Ladder frame the site for motor vehicle

 

(57) Abstract:

The invention relates to the field of motor vehicles, especially vehicles, pick-up trucks and similar vehicles, namely, stair frame nodes for them. A method of manufacturing a frame node for a motor vehicle includes education in the rear, front and center spar modules. The Central spar module is formed by moving the sheet metal material through a series of cooperating rollers, constructed and adapted so that when the rotation come into contact with the opposite sides of the above-mentioned sheet, bending it in configuration, having a General U-shaped cross-section. The cross section has the area of the main vertical wall and a pair of elongated outwardly parallel plots horizontal walls extending from opposite ends of the specified portions of the main wall. This plot main wall bend between two spaced it points in the General case, within its plane tensile one of the mentioned sections of the horizontal walls extending from one end of a specified area of the main sensornogo the end of the specified portions of the main wall. Front and rear spar modules rigidly attached to the opposite ends of the Central spar of the module. An object of the invention is to achieve the possibility of making spars of any desired shape. 2 C. and 25 C.PP.f-crystals, 27 ill.

The present invention relates to spar frame nodes and to the method of manufacturing them.

In the field of motor vehicles, especially vehicles, pick-up trucks and similar vehicles, it is well known supply of the vehicle ladder frame unit for fixing the various units of the vehicle, such as the body, engine, suspension system, etc., In the typical case frame node is composed of a pair of parallel side members extending along opposite sides of the vehicle, and a multitude of transverse elements connecting the side members at spaced points throughout. Frame the node operates as the main carrying load element, to provide stiffness and strength instead of body parts, as is done in "odnokozova" design, which is usually used in model cars.

In the most recent years frame transport nodes conveniently be divided into a front frame module, the Central frame module and the rear frame module. This facilitates manufacture and allows the use of some of frame modules with more than one type or more than one vehicle model. Moreover, the modular design gives the advantage that the various parts of the frame node can be manufactured with different structures. For example, the front frame module is made, preferably, with closed truss spars (i.e., having a configuration, a closed cross-section) to get the frame node with maximum strength to achieve resistance to shock loads and stiffness to torsion under the cab. On the other hand, Central and rear frame modules are made, preferably, with a U-shaped configuration in cross section and open section configuration, angled inwards towards the vehicle in order to increase the bending efficiency and to facilitate the fastening of the transverse elements and other details. Used herein, the term " U-shaped may be synonymous with "S-shaped" configuration, in which the inward turned flanges provided on the respective ends of the U-shaped configuration.

When ishodnym stamp or a large number of other elements forming the form-block, with the help of which pressed (by blow) original sheet metal, usually steel, concluded between them, to form the spars and transverse elements of the desired shape (for example, having a U-shaped configuration in cross-section). During the stamping process the source material serially move and punched in a variety of stamping plants until then, until you get final form. Moreover, stamping form blocks and equipment are relatively expensive and must be replaced often. As a result of this you can understand that the complexity and cost of the equipment associated with the production node stamped frame elements are significant.

Another problem associated with punching a flat metal sheet, is that a significant amount of source material is lost, especially when you need the frame parts of irregular shape. More specifically, when the original sheet of material punched parts which have an irregular shape, then a significant amount of material on the periphery (in particular, the side edges of the sheet) can not be used, regardless of how closely stamped profiles distributed across the sheet. Prov.be due to incorrect form stamped part. It can be understood that in the case of large production volumes, the number of lost material and associated costs will be for stamping significant.

Another problem is posed by the Assembly of stamped parts in the frame node. In the typical case it is done using electrode welding in which to detail is a significant amount of heat. During this Assembly process stamped parts must be clamped in certain provisions for rationing return to a previous state and stresses that are generated during heating and Assembly. Otherwise, without fixing these directions lead to significant distortion of the host ( generally 6-12 mm are typical values). This high Assembly cost and complexity of technological equipment for large production volumes lead to large capital investments, significant manufacturing costs and the cost of secondary operations needed to obtain a quality site.

In patent literature offers processes, according to which the side members are made of profiled sheet metal roller plate bending installation, not punching. More specifically, in U.S. patent N 212 is who consistently bend the sheet into a tubular spar, having a rectangular shape in cross section. Profiling sheet metal bending roller installation offers many advantages compared to stamping. For example, the capital cost of production equipment is much lower. In addition, since the bending roller installation does not create shock stresses inherent stamping shapes-blocks, they need less maintenance and have a long service life. Moreover, as the sheet material passes continuously through a series of rollers, the time required for the manufacture of the spar, is reduced. In addition, since the bandwidth of the original material is completely used in the manufacture of the spar, loss of source material small or absent. The Assembly processes extremely simplified, as the parts are joined during profiling, resulting in a complete profile of the closed box. Therefore, we can understand that the cost of manufacturing when profiling metal roller plate bending installation is substantially less than for stamping.

However, the advantages of profiled sheet metal roller measures in the greater part of the necessary configurations, it is helpful not only to provide a U-shaped Central frame rails in cross-section, but also to give the Central part of the spar bending in the vertical direction, for example, to accommodate the axle of the rear wheels. As opposed to stamping profiling sheet metal can be made only rectilinear side member (i.e., without any bending in the vertical plane), any vertical curves should be performed during subsequent operations. For example, in the aforementioned U.S. patent N 2127618 indicated that straight spar with rectangular profile after the formation can be bent by the bending machine to create the front and back rise. Although it is relatively easy to make in relation to the bend configuration with a rectangular cross-section due to its inherent strength, still trying to bend formed by profiling spar having a U-shaped, were unsuccessful. More specifically, such attempts were ineffective due to the relative weakness configuration with open profile and its sensitivity to undesirable twisting and deformation. The use of closed trouble Assembly of the vehicle due to the requirements due to the geometry of the engine, front suspension and other parts. Final design work is inefficient from the point of view of use of the material and is useful for small volume applications and heavy-duty vehicles when saving attachments can be reconciled with the negative side of the material cost and limitations in the Assembly are not determinative.

Therefore, there is a need to produce a frame node for a vehicle relating to the above. Therefore, the aim of the present invention is to meet this need. In accordance with the teachings of the present invention this objective is achieved by creating a method of manufacturing a ladder frame node for motor vehicles. Two of the stages of the method according to the present invention consist in the formation of the rear spar of the module and in the formation of the front spar of the module. Another stage is the formation of the Central spar module containing a pair of Central side members, with each of the main spars formed by 1) moving the sheet metal material through a number of interacting roliana leaf way which the sheet is bent into a configuration having, in General, a U-shaped cross section together with a plot of the vertical main wall and a pair of elongated areas outside of the horizontal walls extending from opposite ends of the main sections of the wall, and 2) bending of a U-shaped configuration of the sheet, including the bending section of the main wall, in the General case, within its plane tensile one of the horizontal sections of the walls, passing from one end of the main wall, and compression of the opposite of one of the sections of the horizontal walls extending from the opposite end section of the main wall. The final step of the method is to hard mount the front spar of the module and the rear spar of the module to the opposite ends of the Central spar of the module.

Front spar module contains a pair of front side members, which are formed by a profiled sheet metal and then welding for harvesting tubular design. In the process of hydraulic exhaust fluid pressure is used to convert the blank into the configuration of irregular shape, and perform pushing con is th final form. When you make parts of the frame with a closed rectangular cross-section ( for example, the front part of the frame, which absorb impact energy), stamping is becoming more problematic, since it is impossible to ustanovit one-piece tubular element. Instead, when necessary tubular parts, rubber stamp lot extruded profiles, which are welded in length. For example, two facing each other, a U-shaped profile can be welded in a configuration close to a rectangular cross-section. This design is more durable or accurate than one of those in which the tubular element is formed as one unit. You can also understand that in order to perform this process requires additional resources, such as a welding material, and additional man-hours for welding.

It should be noted that the profile of the sheet metal can be used to manufacture the tubular element to the front of the spar. For example, to form a rectangular configuration specified in the aforementioned U.S. patent N2127618, you need to roll the side edges of the strip configuration with a square cross-section up until the side edges of obrazovaniya as a single tubular spar almost rectangular profile of the tubular workpiece, known as the hydraulic processes hood. For example, see U.S. patents NN 5107693, 5233854, 5333775, 4567743, 5070717, 5239852 and 5339667. Although the obtained hydraulic hood side members offer significant advantages when used as front parts spar frame node, still from the prior art modular unknown spar frame unit having the front spars, educated hydraulic hood, and formed by rolling and flexible U-shaped Central spars.

In accordance with the teachings of the present invention, each of the front side members is formed by 1) the premises of the metal tubular element in the cavity of the mold, and the mold has an inner surface that defines the geometry of the cavity, and 2) the fluid inside the metal tubular member with sufficient pressure to expand the tubular element to the outside before coming in contact with the inner surface of the mold with the aim, in essence, approval of the tubular element to the geometry of the cavity.

The purpose of the present invention is also achieved by creating a beam of frame node for a motor vehicle, containing a rear frame unit is in; the Central frame module, including a pair in parallel, the Central side members connected by a Central node of the transverse elements, each of the main spars has, in General, a U - shaped configuration in cross section together with a plot of the vertical main wall and a pair of elongated outwardly, generally parallel, horizontal sections of walls extending from opposite ends of the main wall, each of U-shaped girders bent between two spaced points on it, and one of their plots horizontal walls, stretched from one end of the main wall has a metal grain, essentially stretched in place between the spaced points, and the opposite one portion of the horizontal sections of the walls extended from the opposite end of the main wall has a metal grains, essentially compressed in place between the spaced points; and a front frame module, which includes a couple of, generally parallel, tubular front side members connected by a front cross-site elements.

Detailed description of the drawings.

Figure 1 is a perspective representation showing the beam RA is in cross-section, showing a curved portion of the Central longitudinal member according to the present invention;

figure 2 (B) - cut perspective representation, partially in section, showing the front end of the Central spar and the rear end of the front side member according to the present invention and the manner in rigid connection with each other;

figure 2(C) is a cross section taken along the line 2(C) - 2(C) in figure 2(A);

figure 2D is a perspective representation showing the Central spar according to the present invention;

figure 3 is a schematic view showing the rolling brake installation according to the present invention;

figures 4(a)- 4(J) - cut section showing heavy metal rollers used in the method of profiling sheet metal according to the present invention;

figures 5(A)-5(C) are schematic views showing a clamping device used in the operation of bending according to the present invention;

figure 5(D) - section showing the clamp for fixing the U-shaped side member when the operation of bending according to the present invention;

figure 6(a), 6(C) and 6(E) - longitudinal section, showing the form for hydraulicallyactuated invention;

figure 6(B), 6(D) and 6(F) is the cross-sectional images in figures 6(A), 6(C) and 6(E), respectively, showing the shape for hydraulic extraction and the tubular blank used in the formation of tubular front frame elements according to the present invention;

figure 7 is a longitudinal section similar to the cross section in figure 6(E), but showing an alternative embodiment of the invention.

The figure 1 shows roughly beam frame node 10, made in accordance with the teachings of the present invention. Frame beam node 10 is preferably of modular construction and includes a rear frame module, generally designated by the number 14, the Central frame module, generally designated by the number 16, and the front frame module, generally designated by the number 18. Front frame module comprises a pair of tubular front side members 20, each of which has a closed cross-section, preferably rectangular, shaped to provide sufficient strength and support in the perception of impact energy. The front side members 20 connected arms 22, which are also preferably of tubular form to provide additional strength to the aqueous means, mounted on it. For example, the front frame module contains mounting brackets of the body (for example, as indicated by the number 24), the brackets 26 and pinion type control, mounting brackets 28 of the engine support bracket 30 of the heat sink and the bracket 32 of the tie rod. As will be described in more detail later, the front frame module 18 is formed, preferably, in the process of hydraulic hood, which allows you to obtain substantially equal to the wall thickness of the tubular front spar 20 throughout its length. In addition, during the process of hydraulic hood there is no need roller in the longitudinal welded seam, and thus, the tubular elements are formed as one unit, and they are stronger and superior in size to those produced by punching or profiled sheet metal bending roller installation requiring such longitudinal welds.

The Central frame module 16 comprises a pair of parallel Central side members 36 connected by transverse elements, for example the power cross-reference element 38 of the transverse elements 40 of the fuel tank. The Central frame module also contains the front installation creste is I. The Central side members 36 are rigidly connected with their front ends 54 with the respective rear ends 56 of the tubular side members 20. Preferably, the rigid connection was carried out by welding the ends together. Also preferably, the Central spars 36 had a cross section facing the inside essentially U-Obernai configuration. This configuration of the side members 36 allows you to easily secure a variety of items, giving at the same time, a significant strength of the Central frame module 16.

Central spars 36 is formed, first, by the operation of rolling, to create a U-obrazow configuration in cross-section, and then by bending operations, in order to give the side members 36 minor front and rear vertical curves, marked with the numbers 60 and 62, respectively. Front and rear bends 60 and 62 serve to accommodate different parts, for example holders of the wheels and axles, and suspension of the vehicle.

In figure 2(A) presents an enlarged view of part of one side member 36 around the back of the bend 62. Shown is essentially U-shaped configuration of the spar. U-shaped configuration has a base which 36 are mounted in the finished beam frame node 10. U-shaped transverse profile further comprises a pair of sections 172, 174 horizontal walls extending from opposite ends of the section of a vertical wall. Sections 172, 174 horizontal walls, in General, parallel to each other and are located essentially horizontally when the Central spars in the finished beam frame node. Sections 172, 174 of the horizontal walls are stretched, in General, inward toward the vehicle, resulting in an open area of the U-oblasnoi the configuration of each Central spar in the same way, facing inwards towards the vehicle in order to ensure the fixing of the transverse elements and other details. In figure 2(A) also can be seen that U-obrana configuration additionally comprises a pair of elongated inward flanged sections 176, 178 extending from the respective ends of sections 172, 174 of the horizontal walls, the opposite ends of which are connected with section 170 of the base. These bumpers can, optionally, be omitted.

However, when the flanges 176, 178 are provided, as can be understood from the figures, the knob 176, passing along the outside of the bent portion, slightly thrown out in regueira straight section of the spar 36, the knob 176 is essentially parallel to the section 179 vertical walls, while the Central spar 36 is not bent. As a result of the bending process, as you can see, the grain of the metal element 172 horizontal wall (on the external area of the bend) are stretched, while the grain of the metal element 174 of the horizontal wall (on the domestic portion of the curve) are compressed.

Extension and refinement of section 170 vertical walls also occurs during bending of the Central spar. Most of these strains and utoncennij extends towards the upper part of section 170 vertical walls (approximately one-third the distance down) adjacent to the outer bend. As suggested, in the General case diamond pattern stretch, generally indicated by the number 180, most sprains section 180 of the vertical wall is in the middle in the direction of the bend 62.

In figure 2(B) shows the front end 54 of the Central spar 36 and the rear end 56 of the tubular front of the spar 20. It can be understood that, when the flanges 176 and 178 are provided throughout the length of the Central longitudinal member 36, it is necessary that the rear end 56 of the side member 20, Digas was placed inside the Central lounge and 176 and 178 are removed on the section 54 of the front end, to facilitate the premises side of the rear end of the side member 20 in the U-financially profile. Found that this greatly facilitates the manufacturing process.

Figure 2(C) is a view in cross section taken on line 2(C)-2(C) figure 2(A). In this figure a sophisticated plot 180 shown in the Central part of the bend (60 or 62), section 170 vertical walls. Figure 2(D) is a perspective view showing the Central spar and, in particular, highlighting the location of the thin murine sections 180 to section 170 of the vertical wall.

Referring now again to figure 1, it can be seen that the rear frame module 14 comprises a pair of parallel rear side members 66 connected by transverse elements 68 which are adapted to secure or maintain the spare wheel. The rear side members 66 have a U-shaped cross-section and with their front ends 76 is rigidly connected with the rear ends 78 of the Central side members 36. Similarly, as described with reference to figure 2(B), the front section 76, Digas or moving to the side, is placed inside the rear areas of the Central spar 36 and then welded.

From figure 1 it can be understood that the front section 76 of the rear lawn is s to provide different sizes of the rear side members 66, it is preferable to make such elements 66 conventional stamping operation, since it is difficult to manufacture spar with different sizes in the rolling process. However, when the rear side members 66 are essentially constant height of the vertical wall, the method of rolling can also be used.

Front frame module 18, a Central frame module 16 and the rear frame module 14 is made preferably in the form of individual sections and then assemble them into a complete frame, the node 10. You can understand that one module or more modules can be replaced by modules other configurations (e.g., with other lengths or curves) for use in different vehicles. This modular design promises substantial savings in production costs, since each module can potentially be used in several different types of vehicles.

Now refer to figure 3 showing a rolling installation for the Central side member 36 according to the present invention. Rolling installation, generally designated by the number 100, comprises razmatyvatelja station 104 for reeling the big bands of the original sheet material 108 passes through a series of machining metal devices, including skin-passing mill 101, the correct machine 103 feedstock, punching press 105, rolling mill 107 and off press 109. Rolling mill 107 is composed of several pairs of interacting heavy metal rollers 112. It is desirable that the last row of rollers steriodal section 111 torsion, which straighten any distortion created by the bending in the area of manufacturing of cold-formed sections.

On a training camp 101 to the rolling process is the compression of the metal in a cold state. This makes the metal more durable and at the same time reduces its thickness (for example, approximately 5%), allowing you to make the frame as a whole easier and at the same time gives the possibility of bending metal with smaller tolerances. Straightening machine 103 source material aligns the sheet metal to fix any defects or discrepancies in the sheet. Punching press 105 punches holes required in the Central spar to secure various designs and for fastening the Central spar to other parts of the frame. After the metal sheet is rolled into a U-shaped profile, a predetermined length of the folded metal is cut with the help of the RAM 4(a)-4(I), showing a more detailed view of the sequence of pairs of metal rollers 112 used in the rolling mill 107 for flexible U - shaped Central spar 36. More specifically, in figure 4(a) shows part of the cross-section of the first pair of rollers 122 and 124, intended for the initial editing of the sheet 108 of the source material, to remove any defects or discrepancies that may exist in the source sheet. In figure 4(B) presents the first operation profiling, achieved by means of rollers 126 and 128. As you can see from figure 4(B), the outer contact with the material surface 130 of the roller 126 has a slightly convex shape, while the outer contact with the material surface 132 of the roller 128 has a slightly convex shape, and the sheet material 108 is compressed between the rollers when they interact with the opposite sides of the sheet. In addition to profiling sheet of starting material rotational engagement of the rollers is also used to feed the sheet to the next pair of rollers, such as are rooms 136 and 138 in figure 4(C). Sequential treatment from figures 4(C) to figure 4(D) and then to the figure 4(E) can be understood that the interacting pair salicortin 176 and 178 on the ends of the U-shaped configuration. Next, in figures 4(F)-4(I) one can see that the second sequence of curves is achieved by the use of rollers 148 and 150, 152 and 154, 156 and 158, 160 and 162 as long as the materials were adjusted to the final desired configuration.

In figure 4(J) for additional illustrations shows a simplified cross section of the rollers 156 and 158 in figure 4 (H).

As a result of execution of the process steps shown in figures 3 and 4 (4(a)-4(I), as can be understood, is formed essentially of a continuous U-shaped cross-sectional configuration of the metal; a continuous sheet of metal is cut during subsequent operations (not shown) on the interval necessary for the Central side members 36 length. The rolling procedure is very advantageous compared to conventional stamping as the entire roll of material 106 can be processed continuously without the need for feeder sections beamed frames in a variety of stamping devices and retrieve them. In addition, the U-shaped profile of the Central spars can more accurately create profiling sheet metal rolling setup than punching, because the sequence of curves gives the opportunity gradually to give the material the desired formularise, it is assumed that, in General, more accurate bent profile is obtained with a larger number of stages. For example, figure 3 shows only three pairs of rollers.

In figure 5(A) shows a clamping device, generally designated by the number 200, is used to bend straight line obtained by profiling sheet metal spar, which is made through a procedure shown in figures 3 and 4(a)-4(I). Clamping device 200 is composed of a fixed frame 202, the holder 204 spar and two bending lever 206 and 208. Clamping device 200 is specially manufactured and adapted for flexible U-shaped profiles (with borders and without them) from a metal having a size, shape and weight of a typical straight spar. At the initial stage, as shown in figure 5(B), rectilinear side member, generally designated 210, connected with bolts and a fixed holder 204 and each bending lever 206 and 208. More specifically and as shown in figure 5(D), the fixed bearing and each lever is individually provided with a clamp, generally designated 201, which is composed of the first mandrel 212, which is adapted for fastening section 174 of the lower horizontal walls of the, izgotovlenie profiling sheet metal spar enshrined in the first mandrel 212, a lot of wedges 216, 218 and 220 is injected into the inner confines of the side member of the U-shaped profile. More specifically, the peripheral wedges 216 and 220 are initially injected laterally into the inner limits of the spar (for example, moving from left to right in the figure 5(B)), and then the Central wedge 218 forcibly injected between the peripheral wedges 216, 220, causing peripheral wedges 216, 220 to move away from each other to essentially continuous contact with the inner surface of sections 172, 174 of the horizontal walls and section 170 vertical walls. The Central wedge can also get in touch with section 170 of the vertical wall. Finally, the second mandrel 222 is fixed behind the wedges to engage the outer surface of the flanged sections 176, 178 and the outer surface 172 of the upper horizontal wall. In creating this design spar essentially captured all of its surfaces that are clamped inside the fixed holder 204 and each of the lever 206 and 208. The capture of these surfaces prevents substantial bending, torsion or other unwanted deformation of the U-shaped spar is correctly rotate (in a clockwise direction in the figure 5(C)) around the respective axes 226 and 228 using hydraulic or other power means.

It can be understood that in the operation of bending, shown in figures 5(A)-5(D), and in accordance with that described above with reference to figure 2(A), the end side member 36 contains a significantly modified metal grains. More specifically, it can be understood that the outer parts of the bending metal grains to some extent stretched, whereas the inner parts of the bending of the metal grain somewhat compressed or gathering. All tension or compression occurs in the areas between the spaced points at which the spar is bolted and secured with appropriate fasteners 201, which are contained in a fixed holder 204 and the levers 206, 208. The stretching and compression of the metal, for example, sections 172 and 174 of the horizontal shoulders completely dissimilar to what happens when the spar U-shaped profile made by a stamping operation, as by forging the horizontal walls are not subjected to bending, stretching or compression.

We turn now to figures 6(a)-6(F), which presents a method of forming a tubular front side members 20 of the front frame module 18. As shown in figure 6(a), pre-curved Trona by any known process. Preferably, if the workpiece is formed by rolling the sheet metal material in the finished closed tubular profile and then welded longitudinal seam. In a typical case, the tubular element 300 pre-bend mechanically, for example through the use of pots in a bending machine with computer numerical control. After the tubular element 300 is entered in the stamp, the nozzles 308 hydraulic hood is introduced into opposite ends 306 of the tubular structure 300 and also seal. As half of the 303 and 304 stamp closer towards each other, the tube 300 slightly rumpled, for example to oval in cross section, as shown in figure 6(D).

Then under high pressure up to 1000 MPa, through the nozzles 308 hydraulic drawing into the inner confines of the tubular structure 300 to supply water. This high pressure forces the tubular structure to expand outward from contact with the inner surface 310, bounding the cavity inside the stamp. As shown in figure 6(F), as a consequence, the tubular design takes the form of the inner surface 310.

As the tubular design is supplied with liquid floor height to complement the wall thickness of the metal at its expansion until it comes into contact with the inner surface 310 of the form. This prevents rupture of the tube 300.

It can be understood that during the above process, hydraulic hood quantity of metal per unit length of the tube is changed. More specifically, as the longitudinal outer contour expands outward, the metal is added from the side portions, resulting wall thickness is kept within 10% of the thickness of the original piece. In areas of greatest expansion of the outer contour increases by more than 10%, while the wall thickness is maintained in the range of 10%. The front spars, preferably, have the greatest perimeter (more metal per unit length) on the areas which need the most strength. For example, in figure 1 you can see that tubular front side members 20 are in General the greatest perimeter locations of the front curved sections, designed to reinforce the suspension and the adjacent mounting brackets 28 of the engine.

Figure 7 is essentially the same as figure 6(E), but it shows an alternative configuration form for hydraulic hood and front tubular longitudinal spars. More specifically, in figure 7 we can see that the inner surface of the molding Papoose to create a profiled tubular element with the form, which provides axial crushing during almost constant effort. When the front end 410 of the tubular element ultimately connect with the front bumper of the car, the design is advantageously operates in the direction of improving the characteristics of the depreciation impact in a frontal collision.

Used the method of forming a hydraulic hood more detail disclosed, for example, in Industrieanzeiger, N 20, March 9, 1984 and Metallumformtechnik, Issue 1D/91, zp. 15, and in the following articles: A. Ebbinghaus Precision workpieces in light construction, manufactured through internal hidh pressure mouldings. - Werkstatt und Betrieb, 123 (1990), 3, p. 241 - 243 Ebbinghaus and A. Economic construction with internal high pressure moulded precision workpieces. - Werkstatt und Betrieb, 122 (1991), 11 (1989), p. 933-938; the above publications are fully incorporated in the description by reference.

Although the invention was explained in detail and described using the drawings and preceding description, they should be considered as illustrative and not restrictive nature, and it should be understood that the shown and described the preferred embodiment of the invention and that all changes and modifications that are within the essence and scope of the attached claims, are protected.

1. A method of manufacturing a frame node m is t a pair of Central side members, each of these side members is formed by moving the sheet metal material through a series of interactive videos with obtaining profile and subsequent bending of the spar, characterized in that it comprises a stage of education in the rear, front and center spar modules, the Central spar module is formed by moving the sheet metal material through a series of cooperating rollers, constructed and adapted so that when the rotation come into contact with the opposite sides of the above-mentioned sheet, bending it in configuration, having a General U-shaped cross-section, having the main plot of a vertical wall and a pair of elongated outwardly parallel plots horizontal walls extending from opposite ends of the specified portions of the main wall, the bending of the specified portions of the main wall between the two spaced it points in the General case, within its plane tensile one of the mentioned sections of the horizontal walls extending from one end of the specified portions of the main walls, and compression of the opposite one of the mentioned plots horizontal stgo and rear spar modules to the opposite ends of the Central spar of the module.

2. The method according to p. 1, wherein the front spar module contains a pair of front side members and each front side member is formed by profiling and welding of sheet metal material in the metal tubular element, the premises of the metal tubular element in the cavity of the mold, and the mold has an inner surface that defines the geometry of the cavity, the fluid inside the tubular metal element with sufficient pressure to expand the specified tubular element outside before coming into contact with the inner surface of the mold with the aim, essentially matching the specified tubular element to the geometry of the cavity.

3. The method according to p. 2, characterized in that the stage of bending further comprises coupling the inner and outer surfaces mentioned U-shaped configuration of the sheet at longitudinally spaced points with bending installation and actuation bending installation while maintaining adhesion with the inner and outer surfaces to bend the specified area of the main wall and said horizontal walls at locations between the spaced points.

4. The method according to p. 3, otlichayuschuyusya of the sheet, including the external surface of the vertical wall and the outer surface of each of the horizontal sections of the walls, with fixation of the outer wall of the specified bending installation at spaced points and the introduction of a rigid wedge elements specified bending installation in a transverse direction relative to the aforementioned U-shaped configuration of the sheet into the inner confines of her and the hard clutch in said spaced points to the inner surface of the aforementioned U-shaped configuration of the sheet, including the inner surface of the vertical wall and the inner surface of each of the horizontal sections of the walls.

5. The method according to p. 4, characterized in that the said U-shaped configuration of the sheet further comprises a flanged sections, elongated in the General direction toward each other parallel to the horizontal wall from the ends of the horizontal sections of the walls, the opposite section of the vertical wall, and in which stage clutch further comprises a hard stage clutch outer surfaces of the flanged sections with fixation of the outer wall of the specified bending installation at spaced points and rigid couplings HV spaced points.

6. The method according to p. 4, characterized in that the attachment of the outer wall includes a fixed frame and a movable frame, saralaya the outer surface of the aforementioned U-shaped configuration of the sheet at spaced points, respectively, in which the wedge elements engage the inner surface of the aforementioned U-shaped configuration at spaced points against the fixed frame and the movable frame and in which stage of flexion stage further comprises moving the lever to the specified bending setup to move the movable mandrel and the wedge elements in front of it relative to the fixed frame and wedge elements in front of her so that the area of the main wall is bent, in the General case, within its plane between spaced points, and so that one of the plots with horizontal walls stretched and the opposite one of the sites with the horizontal walls is compressed in place between the spaced points.

7. The method according to p. 5, characterized in that the attachment of the outer wall includes a fixed frame and a movable frame, saralaya the outer surface of the aforementioned U-shaped configuration of the sheet at spaced points, respectively, of R points, against the fixed frame and the movable frame, and in which stage of flexion stage further comprises moving the lever to the specified bending setup to move the movable mandrel and the wedge elements against it relative to the fixed frame and wedge elements against it so that the area of the main wall is bent in the General case, within its plane between spaced points, and so that one of the plots with horizontal walls stretched and the opposite one of the sites with the horizontal walls is compressed in place between the spaced points.

8. The method according to p. 7, characterized in that stage of movement of the arm during bending is caused by movement of one of the flanged sections extending from one outer section of the horizontal sections of the walls, in the direction away from the plot of the vertical walls so that these flanges, in General, no longer stretched toward each other.

9. The method according to p. 2, characterized in that it further comprises a stage forced indentation inside opposite ends of the tubular element, generally in the direction of each other, when the flow of liquid TRU is striated item before placing it in the cavity of the mold.

11. The method according to p. 2, characterized in that the stage of formation of the rear spar of the module contains the stage of movement of the sheet metal material between the interacting stamping shapes-blocks, designed and adapted to compressible to get in contact with opposite sides of a sheet between them, thereby to bend the sheet into a configuration having, in General, a U-shaped cross section together with a plot of the vertical main wall and a pair of elongated areas outside of the horizontal walls extending from opposite ends of the specified portions of the main wall.

12. The method according to p. 7, characterized in that stage a rigid attachment contains a stage of removal of the flanged sections at the ends of the Central longitudinal side members to provide a rigid attachment to the ends of the front rails and move the ends of the tubular front side members in a direction, generally perpendicular to the inner surface of the element vertical walls, up until the ends of the tubular front spars will not come into contact with the inner surfaces of the Central side members at their ends, having sites is Geroev.

13. The method according to p. 2, characterized in that stage a rigid attachment contains the stage of joining the front spar of the module and the rear spar of the module with the opposite ends of the Central spar of the module.

14. The method according to p. 2, characterized in that it further comprises a stage of change in the quantity of metal per unit length of the tubular element as the tubular element extends.

15. The method according to p. 14, characterized in that it further comprises a stage of expansion in one dimension the outer contour of the tubular element in its predetermined parts of more than 10% of the initial external circuit in one dimension while maintaining the wall thickness of up to 10% of the initial wall thickness.

16. Ladder frame node for a motor vehicle, containing a rear frame module, including a pair of parallel rear side members connected by a rear cross-site elements, the Central frame module, including a pair of parallel Central side members, each of the Central side member has a General U-shaped configuration in cross section together with a plot of the vertical main is unjust in the extreme ends of the specified uchastka main wall and the front frame module, including a pair of parallel front side members connected by a front cross-site elements, wherein each of the Central U-shaped girders bent between two spaced points on it and one of the horizontal sections of the walls, stretched from one end of the specified portions of the main wall has a metal grains, essentially stretched in place between the spaced points, and the opposite one area of these plots, the horizontal walls extended from the opposite of the specified portions of the main wall has a metal grains, essentially, is compressed in place between the spaced points, and the front side members have a tubular shape.

17. Site under item 16, characterized in that the specified area of the vertical wall contains metal grain, stretched between two spaced points, plot the vertical wall has a part located closer to the extended horizontal wall, stretched to a greater extent than the part closer to the compressed section of the horizontal wall.

18. Site under item 17, characterized in that the maximum degree of stretch of land vertical wall is concentrated in General the C front spars of the specified front frame module has a front part with alternately increasing and decreasing in external diameter, to improve the shock damping characteristics of the front spars.

20. Site under item 16, characterized in that each tubular front side members has a General rectangular cross-section.

21. Site under item 16, characterized in that each of the mentioned U-shaped Central spar further comprises a pair of flanged sections, each of which extended from the respective ends of the horizontal sections of the walls, the opposite section of the vertical wall.

22. Site on p. 21, characterized in that the flanged sections parallel to the plot of a vertical wall in a place outside of the area between two spaced points, and in which one of the flanged sections bent in such a way that deflected from the vertical section of the wall in the space between two spaced points.

23. Host by p. 22, characterized in that the front and rear frame modules are rigidly attached to opposite ends of the Central frame module.

24. Host by p. 23, characterized in that each of the main rails free of raised areas on the front ends.

25. Site under item 16, characterized in that the number of the P> 26. Site on p. 25, characterized in that in one dimension the outer contour of each of the tubular front side members extended in a predetermined part of his more than 10% relative to its other parts while maintaining the wall thickness of up to 10% relative to other parts.

27. Site under item 26, characterized in that the said tubular side members are between the ends of the curved sections adapted to secure the suspension of the vehicle, and in which the predetermined part of the above mentioned tubular side members, extended more than 10%, are in General between the regions, defining mentioned curved areas.

 

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The invention relates to the field of construction machines and can be used in self-propelled lifting cranes, in particular in the automotive cranes

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Vehicle // 2055769
The invention relates to transport and agricultural machinery

The invention relates to the field of transport engineering, namely to the frames of vehicles

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FIELD: metallurgy industry.

SUBSTANCE: hollow semi-finished product made in the form of a tube is installed in press mould, liquid is injected inside hollow semi-finished product, high liquid pressure is created for deforming hollow semi-finished product and for forming axial component mainly of elongated shape by simultaneous obtaining at least two and mainly equal axial components with their being overlapped in the length direction. After that they are separated.

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FIELD: metallurgy.

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9 cl, 9 dwg

FIELD: process engineering.

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FIELD: transport engineering.

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3 cl, 15 dwg

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FIELD: construction.

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FIELD: transportation.

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9 cl, 3 dwg

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FIELD: automotive industry.

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4 cl, 8dwg

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