Holding device

FIELD: mechanic.

SUBSTANCE: holding device includes, as a minimum, several pulling clips, each of which contains, as a minimum, one pulling frame with a closed circuit and two segments separated and located oppositely to each other; between the segments, forming device is located. Each of the segments has supporting surfaces. Each of the pulling clips is designed with the possibility to rotate at one hinge, as a minimum. Also, there is a supporting surface located above the forming device or on its surface, and serving as a support for the supporting surface of the pulling clip, and a device for providing a certain holding force designed as several power components. The pulling frame material is a reinforced compound. The device for producing metal parts by hydro-forming includes, as a minimum, closed forming instrument and holding device. The device for holding the tool includes, as a minimum, pulling clip with at least one closed circuit pulling frame with two segments separated and located oppositely, to each other, between which the forming tool is located. Each segment has supporting surfaces. The device also has supporting surfaces and designed based on the condition of providing certain holding forces between the supporting elements of the pulling clip and a surface located higher or lower of the tool. The line of application of the composite force resulting from the holding forces is located parallel and in a plane, which does not diverge essentially from the plane dividing the pulling clip into two halves in the axial direction. The material for the pulling frame is a reinforced alloy.

EFFECT: increase in performance and quality of manufactured products.

12 cl, 6 dwg

 

The invention relates to a holding device for a device designed for the manufacture of metal parts by plastic deformation in the closed molding tool, and the device for manufacturing metal parts by plastic deformation in the closed molding tool equipped with such a holding device according to the invention.

As used in the invention, the term "plastic deformation in the closed molding tool covers all forming methods, in which the impact force on the working of the workpiece to its deformation occurs inside consisting of several parts, but at the moment of impact forces, essentially, a closed molding tool, and applied to the forming tool holding force, usually more than 3 MN. This method of molding is, for example, so-called hydroforowni under high pressure using divided in the longitudinal direction of the moulding tool.

For hydroturbine used devices, primarily equipped with hydraulic systems. The design of such devices is largely determined by the manufactured work pieces, the original procurement represents, in particular, hollow tubular product is. The main cylinders that serve to transfer forces to the ends of the tubes are arranged vertically or horizontally, so that they will act in opposite directions, in the direction of the original axis of the pipe. One of these cylinders is mostly hollow and has a network connection high pressure, usually attached to the multiplier through pipe connections.

Forming tool comprises at least two parts. In the simplest case, one part of this two-part tool fixedly mounted on the machine table, and the other part provided with a drive and provides the opening and closing movement in accordance with the working cycles. Depending on the desired geometry of the working harvesting devices can operate as divided in the longitudinal direction and in the transverse direction of the molding tools, while retaining the strength of more than 3 MN typically used divided in the longitudinal direction of the molding tools. Such devices often are economical only when a large number of manufactured workpieces, i.e. when used short work cycles.

Device for hydroturbine, equipped with a split in the longitudinal direction of the pipe axis of the molding tool, often made as a multi-column press is whether the frame of the press. The molding tool is mounted so that when replacing the instrument press the plunger moves up one element of the molding tool. During the process of forming the plunger of the press must compensate affecting the molding tool force formed projected from the surface of the workpiece and the internal pressure, and applying force to the forming tool is at least equal to or higher pressures. In connection with due to the production technology of high internal pressures (typically over 1000 bar) is required for this retention efforts more than 3 MN should be provided at the expense of the steel structures of the device that when using multi-column or frame presses requires a relatively large overall height and high installation and working space. In accordance with the perceived force of 3 MN and above and a large private masses corresponding to these structures require expensive foundations and large space. The process of replacing the tool, in particular a forming tool is technologically costly procedure.

From German patent DE 1602475 B2 is known baling device for producing hollow work pieces of steel sheet by cold forming using the internal Hydra is symbolic of pressure, in which the moving parts of the environmental working blank divided form during cold forming are held together by folding the locking hooks. If such a pressing device must be capable of holding force in excess of 1 MN, in particular more than 3 MN, accordingly vary the dimensions of the locking mechanism, in particular the locking hooks or hinges to rotate the locking hooks. Such devices weighs several tons require expensive foundations and have a greater overall height. The locking hooks, if they are able to provide the necessary retention efforts can be operated with great effort and with large energy costs.

Short cycles within 20-40 seconds required for economical operation in industrial production, the result in this case, large inertial forces is not possible. This solution, moreover, leads to the formation of the gap between the parts of the molding tool in the process of directly forming process is explained, in particular, the elastic deformation of the material of the fixing hooks and leads to undesirable deformation of the working of the workpiece during building efforts.

The objective of the invention is the provision of the device is STV and details of the device, having smaller overall height and less own weight, requiring less expenditure in connection with the investment, maintenance and operation, ensuring efficient operation and precluding the formation of a gap between the parts of the molding tool during the molding process.

The objective of the invention is achieved due to the fact that the retaining device according to the invention contains at least:

several traction brackets, with each of the traction brackets has at least one traction frame with a closed loop and two spaced apart and opposite each other by segments, between which is located a forming tool, where each of these segments has at least one bearing surface or bearing surface, and each of the traction brackets rotates, at least one hinge, wherein the material of the traction frame is mainly reinforced the connection

- support surface located above the molding tool or on its surface and which serves as a support for the support surface traction brackets,

- a device that provides holding force of more than 3 MN and having several power elements, and the holding force is attached between the support surfaces and the traction brackets and at least a surface located under formal cnym tool.

The material of the traction frame is basically a material with a tensile tensile strength of 1500 to 4200 N/mm2, limit fatigue strength from 1200 to 3000 N/mm2and a density of from about 1.2 to 2.5 g/cm3.

A device that provides holding force, can be located between the support surfaces of the traction brackets and directly next to the molding tool.

A device that provides holding force, can be located between the support surfaces of the traction brackets and indirectly with the molding tool.

Power elements of the specified device acting on the traction bracket, located so that the center line of application of force of these power elements of the specified device are essentially parallel to and along the plane does not deviate essentially from the plane, which divides in half the traction bracket in the axial direction.

Power elements of the specified device are one or more hydraulic cylinders high-pressure.

Preferably, at least one traction bracket is displaced in the axial direction of the tool.

Traction frame can be made of non-metallic compounds with reinforcement.

Traction frame can be made of compounds with carbon fiber, for example the EP notriptyline fiber, with a fiber content of 50 to 65 volume percent in a matrix of epoxy resin.

The choice corresponding to the invention of the material and its design allows, on the one hand, to ensure the rotation of the traction brackets technically simple manner and with little energy cost, which has a positive effect on the required cycle time and, on the other hand, provides the appearance of a slight dynamic forces.

The use and selection of appropriate invention materials with specified properties of the material used as a structural material, permits, compared with usually used for plastic deformation of materials, in particular, structural steel, new designs and new designs of machines.

For example, the tensile strength tensile connection with carbon fiber is about 2950 N/mm2(structural steel from 320 to 690 N/mm2), the fatigue limit of about 1950 N/mm2(structural steel 350 N/mm2) and a density of about 1.8 g/cm3.

Corresponding to the invention of the element holding mechanism in the form of traction brackets, which provides the necessary force retention, allows purposefully implement superior quality selected according to the invention the material type of connection is on with carbon fiber, for example, the ratio of the effective bearing capacity to the weight of the traction frame will be about 800.

The objective of the invention is also achieved by an apparatus for manufacturing metal parts by hydroturbine, which contains at least a closed molding tool and holding device according to paragraphs 1-8.

In addition, the invention is also achieved by an apparatus for manufacturing metal parts by plastic deformation in the closed molding tool, which includes at least:

traction bracket, and pulling the bracket has at least one designed as a closed loop traction frame with two spaced apart and facing each other by segments, between which is located a forming tool, where each of these segments has at least one bearing surface or a support surface, and the material of the traction frame is mainly reinforced the connection

- support surface associated with the support surface below or above the tool and/or on its surface, where the device is made of conditions for application between the support surfaces and the traction bracket and at least a surface located above or below instrumentarium effort or restraint efforts together, component or components 1 MN, and the holding force or restraint efforts thus affects or is affected by the corresponding traction bracket that the resultant of the force lines of force application runs essentially parallel to and in a plane that is essentially not deviate significantly from the plane, which divides in half the traction bracket in the axial direction.

Traction bracket is made with the possibility of rotation, at least one hinge or offset to the tool in the axial direction.

Embodiments of the invention represented in the drawings and described in detail in the following description.

Figa - side view of the restraint.

Fig.1b is another side view of the holding device according figa.

Figa is a perspective view of an alternative holding device with a closed molding tool.

Fig.2b is a perspective view of the holding device with an open molding tool.

Figa - side view of a part holding tool, lateral projection.

Fig.3b is another side view of the workpiece holding tool according figa.

1 shows a side view of a holding device 1 according to the invention as an integral element of the device for manufacturing metal parts by hydroturbine with consisting of TLDs which parts of the closed molding tool 12. On the Foundation 13 is fixed machine hour 6 consisting, essentially, of a box-shaped design, made of structural steel. Frame 6.3 with 6.2 hours connected with frame 6.1. On the rack 6.2, there are two hinge 8, fixedly mounted in the direction of the longitudinal axis of the machine 6 hours. On the hinges 8 both fixed pulling bracket 2 so that they can be rotated, essentially parallel to the longitudinal axis of the machine 6 hours. The rotation of the traction brackets 2 by means of two hydraulic rotary cylinder 9 located on the frame 6.3. In the four corners of the frame 6.3, relying on it, there are four lifting cylinder 4 connected to the head plate 3. Yoke 3 has a flat support surface 3.1, which are based on the same flat and parallel them located support surface 2.1 of the traction brackets 2 in their closed position. On traverse 3 is fixed to the upper part consisting of two parts of the closed molding tool 12. The lower part of the moulding tool 12 is rigidly fixed on the machine table 7. Machine table 7 lies freely on the surfaces of the pistons of the four working cylinders forming the power elements of the device 5.

Working cylinders mounted on the frame 6.1 so that these power elements of the device 5 acting on the traction bracket 2, preferably containing a number of the hydraulic cylinder pressure, located so that the center line of application of force of these power elements of the device 5 are essentially parallel to and along the plane does not deviate essentially from the plane, which divides in half, pulling the strap 2 in the axial direction. Segments 2.3 mostly made of light metal, such as aluminum alloys. Traction frame 2.2 consist mainly of compounds with carbon fiber, for example notriptyline fiber with a fiber content of 50 to 65 volume percent in a matrix of epoxy resin.

Following the principle of operation of the above device in relationship.

After laying the workpiece in an open molding tool 12 the latter is closed, to which piston rods of the lifting cylinder 4 is brought down so that both parts of the molding tool 12 are closed. Then both traction brackets 2 using the rotary cylinder 9 are installed in a vertical position so that between the support surfaces 3.1 beam 3 and the reference surfaces 2.1 traction brackets 2 is formed an air gap necessary for the installation of traction brackets 2 without touching. Now with working cylinders through the machine table 7 holding force is applied to the forming tool 12. While the machine table 7 and the entire forming tool 12 is lifted to contact supports the s surface of the bar 3 and the traction bracket 2. Then both parts of the closed molding tool 12 is necessary holding force, that is, the molding tool 12 is clamped.

Figure 2 presents a perspective view of an alternative holding device with an open stamp (figa and fig.2b). Machine hour 6 consists essentially of a box-shaped steel structures. The lower frame 6.3 using the four vertical supports rigidly connected with the frame 6.1. In addition, between these frames is the holder of the traction bracket 10 connected with a frame 6.3 using the four spring guides 11. On the holder traction brackets 10 secured both hinge 8. The hinges 8 bottom part attached both traction bracket 2 so that they can be rotated parallel to the longitudinal axis of the machine 6 hours. The rotation of the traction brackets 2 by means of two hydraulic rotary cylinder 9 located on the frame 6.3. In the four corners of the frame 6.1 vertically are four lifting cylinder 4 connected to the head plate 3. Yoke 3 has a flat support surface 3.1, which are based on the same flat and parallel them located support surface 2.1 of the traction brackets 2 in their closed position (figa). Both traction brackets 2 are composed each of two semicircular arranged against each other segments 2.3, and almost semicircular contours of the top of the it and lower segments 2.3 deployed from each other. The annular rigid traction bracket 2.2 covers semicircular contours of the upper and lower segment 2.3 and connected with them. On traverse 3 is fixed to the upper part consisting of two parts of the closed molding tool 12. The lower part of the moulding tool 12 is attached to the chassis 6.1, on the lower side of which are four speakers down the working cylinder. The working cylinder 5 through the four holes of the holder traction brackets 10 are pressed into the bearing area 2.4 of the lower section 2.3. Working cylinders mounted on the frame 6.1 so that when closed, pulling the bracket 2 (figa) the Central line of application of force of this power device element 5 held essentially parallel to and along the plane does not deviate essentially from the plane, which divides the traction bracket 2 in the axial direction in half.

Following the principle of operation of the above device in relationship.

After laying the workpiece in an open molding tool 12 the latter is closed, to which piston rods of the lifting cylinder 4 is brought down so that both parts of the molding tool 12 are closed. Then both traction brackets 2 using the rotary cylinder 9 are installed in a vertical position so that between the support surfaces 3.1 beam 3 and the reference surfaces 2.1 traction brackets 2 is formed in zduny gap, required for installation of the traction brackets 2 without touching. Now with working cylinders force is applied to the bearing surfaces of 2.4 traction brackets 2. While pulling the strap 2 is moved down to contact the abutment surfaces 3.1, 2.1 beam 3 and the traction bracket 2. Then both parts of the closed molding tool 12 by means of working cylinders is necessary holding force, that is, the molding tool 12 of this effort is clamped so that during the molding process hoist parts of the molding tool 12 becomes impossible.

Figure 3 presents a side view of the workpiece holding tool 1 as an integral part of the device for manufacturing metal parts by hydroturbine, equipped with a molding tool 12. On the Foundation 13 is fixed machine hour 6, consisting mainly of box-shaped design, made of structural steel. The lower frame 6.3 using rack 6.2 rigidly connected with the frame 6.1. On the rack 6.2, there are two hinge 8, rigidly fixed in the direction of the longitudinal axis of the machine 6 hours. The hinges 8 are attached both traction brackets 2 and thereby the pair of nodes according to the invention so that they can be rotated, essentially parallel to the longitudinal axis of the machine stand 6.

Alternatively, the traction bracket 2 may be the located with the possibility of axial displacement to the tool 12 (figure 3 not shown).

The rotation of the traction brackets 2 by means of two hydraulic rotary cylinder 9 located on the frame 6.3. In the four corners of the frame 6.3, relying on it, there are four lifting cylinder 4 connected to the head plate 3. Yoke 3 has a flat support surface 3.1, which are based on the same flat and parallel them located support surface 2.1 of the traction brackets 2 in their closed position. On traverse 3 is fixed to the upper part consisting of two parts of the closed molding tool 12. The lower part of the moulding tool 12 is rigidly fixed on the machine table 7. Machine table 7 freely rests on the supporting surfaces of the pistons of the four working cylinders forming the power elements of the device 5. Working cylinders mounted on the frame 6.1 so that these power elements of the device 5 located in such a way that the clamping force or the clamping forces act on the traction bracket 2 so that the resultant of the force lines of force application runs essentially parallel to the plane, which, essentially, does not deviate from the plane, which divides in half, pulling the strap 2 in the axial direction. Segments 2.3 mostly made of light metal, such as aluminum alloys.

Traction frame 2.2 consist primarily of non-metallic reinforced connection, in this case, connect the Oia with carbon fiber, for example notriptyline fiber with a fiber content of 50 to 65 volume percent in a matrix of epoxy resin.

Following the principle of operation of the above device in relationship.

After laying the workpiece in an open molding tool 12 the latter is closed, to which piston rods of the lifting cylinder 4 is brought down so that both parts of the molding tool 12 are closed. Then both traction brackets 2 using the rotary cylinder 9 are installed in a vertical position so that between the support surfaces 3.1 beam 3 and the reference surfaces 2.1 traction brackets 2 is formed an air gap necessary for the installation of traction brackets 2 without touching. Now with working cylinders through the machine table 7 holding force is applied to the forming tool 12. While the machine table 7 and the entire forming tool 12 is lifted to contact the supporting surface of the bar 3 and the traction bracket 2. Then both parts of the molding tool 12 is necessary holding force, that is, the molding tool 12 is clamped.

Thus, the item according to the invention can be used as an integrated element holding the instrument used for the molding of parts from plastics, metals, ceramics and CTE is La.

The shaping of the workpiece can be carried out, for example, by blow moulding or injection molding large plastic parts. For example, using the node according to the invention, consisting of one or more parts according to the invention, it is possible without the formation of cracks close two-part form of the inflatable unit. The basic idea of the invention can be easily known method implemented by a specialist after necessary adaptation to the respective parameters.

Another example use of the invention is casting a known manner of metal, ceramic or glass parts.

1. Holding device for a device for manufacturing plastic, metal, ceramic or glass parts by plastic deformation in the closed molding tool, characterized in that it contains at least some traction brackets (2), each of which has at least one traction frame (2.2) with a closed loop and two spaced apart and opposite each other segments (2.3), between which is located the moulding tool (12), each of these segments (2.3) has at least one bearing surface (2.1) or bearing surface (2.4), each of the traction brackets (2) made with the possibility of rotation, at least on odnomernye (8), the material of the traction frame (2.2) is mainly reinforced the connection support surface (3.1)located above the moulding tool (12) or on its surface and which serves as a support for the support surface (2.1) traction brackets (2)and the device (5) in the form of several power elements to ensure retention efforts more than 3 MN, attached between the support surfaces (2.1) and (2.4) traction brackets (2) and at least the surface underneath the moulding tool (12).

2. The retaining device according to claim 1, characterized in that the material of the traction frame (2.2) is basically a material with a tensile tensile strength of 1500 to 4200 N/mm2, limit fatigue strength from 1200 to 3000 N/mm2and a density of from about 1.2 to 2.5 g/cm3.

3. The retaining device according to claim 1, characterized in that the device (5) is located directly between the support surfaces (2.4) traction brackets (2) and directly next to the moulding tool (12).

4. The retaining device according to claim 1, characterized in that the device (5) is located between the support surfaces (2.4) traction brackets (2) and indirectly with the moulding tool (12).

5. The retaining device according to claim 1, characterized in that the power components of the device (5)acting on the traction bracket (2)are of the living conditions of the Oia ensure the passage of the Central line of application of force of these power elements of the device (5), essentially parallel to and along the plane does not deviate essentially from the plane, which divides in half the traction bracket (2) in the axial direction.

6. The retaining device according to claim 5, characterized in that the power components of the device (5) represent one or more hydraulic cylinders high-pressure.

7. The retaining device according to claim 1, characterized in that at least one of the traction strap (2) is displaced in the axial direction of the tool (12).

8. The retaining device according to claim 1, characterized in that the traction frame (2.2) is made of non-metallic compounds with reinforcement.

9. The retaining device according to claim 7, characterized in that the traction frame (2.2) is made of compounds with carbon fiber, for example, notriptyline fiber with a fiber content of 50 to 65% by in a matrix of epoxy resin.

10. Device for the manufacture of metal parts by hydroturbine, characterized in that it includes at least a closed molding tool and holding device according to any one of claims 1 to 8.

11. Device for the manufacture of metal parts by plastic deformation in the closed molding tool, characterized in that it comprises at least the traction bracket (2)with at least one in is executed as a closed loop traction frame (2.2) with two spaced apart and facing each other segments (2.3), between which is located the moulding tool (12), each of these segments (2.3) has at least one bearing surface (2.1) or one bearing surface (2.4)and bearing surface (2.1), associated with a support surface (3.1)below or above the tool (12) and/or on its surface, where the device is made of conditions for application between the support surfaces (2.1) and (2.4) traction brackets (2) and at least a surface located below or above the tool (12) holding force or restraint efforts together constituting or components 1 MN, and ensure the location of the line of application resultant force from the retaining force or restraint efforts on the corresponding traction bracket (2)essentially parallel to and in a plane essentially not significantly deviating from the plane, which divides in half the traction bracket (2) in the axial direction, and the material of the traction frame (2.2) is mainly reinforced the connection.

12. The device according to claim 11, characterized in that the traction bracket (2) made with the possibility of rotation, at least one hinge (8), or offset to the tool (12) in the axial direction.



 

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FIELD: plastic metal working, possibly manufacture of cylindrical articles from sheet blanks by action of compressed air pressure.

SUBSTANCE: method comprises steps of making flat sheet blanks of different width; discretely securing less width blanks to surface of wide blank; simultaneously imparting to blank cylindrical form and forming hollow lengthwise ribs; on formed cylindrical articles forming lengthwise straight edges arranged in parallel relative to vertical longitudinal plane by cold deforming, for example by means of punch.

EFFECT: lowered metal and labor consumption for forming articles, increased rigidity and carrying capacity.

3 dwg, 2 ex

FIELD: plastic metal working.

SUBSTANCE: invention relates to methods of manufacture of articles from titanium alloys by superplastic molding and diffusion welding. For this purpose at least two blanks of titanium alloy are used. Sections are marked on surface of at least one of blanks to be subjected and not to be subjected to joining, blanks are assembled into pack, heated to preset temperature and force of preset value is applied by press to connect blanks by diffusion welding to get semifinished article, working medium is heated and delivered under pressure into inner space of semifinished article for superplastic molding of at least one of blanks to get article of required form. Diffusion welding is carried out through gaskets made of titanium alloy with flow stress less than that in blanks provided owing to smaller size of grains in gasket as compared with grains in blanks. When article is made of three and more blanks, material preventing connection of sections not to be connected is applied to part of surfaces of one of blanks.

EFFECT: improved quality, reduced labor input.

7 cl, 4 ex, 10 dwg

FIELD: plastic working of metals, namely molding of metallic containers and similar articles.

SUBSTANCE: method is realized for three stages. At stage (a) hollow metallic blank with closed end is placed in cavity of die. Sizes of die cavity are sufficient for embracing lateral surface of hollow metallic blank and wall of die cavity defines desired shape in order to provide initial gap between blank portion and wall of die. At stage (b) blank is subjected to action of inner pressure of fluid for expanding blank outwards practically till its complete contact with wall of die and for imparting to it desired size and shape. At stage (c) punch acts upon blank. Said punch is mounted in zone of one end of die cavity with possibility of motion before or after starting blank expansion but before termination of its expansion inside said end of die cavity. Punch acts upon closed end of blank for shifting said end and for providing deformation of closed end of blank at process of blank expansion till its complete contact with wall of die. Blank is arranged in die cavity in such a way that its closed end is directed to punch and is arranged near punch. Fluid pressure for expanding blank outside is fed by supplying excess inner pressure and providing action of fluid pressure upon closed end of blank. At stage (c) simultaneous feed of excess inner pressure of fluid and control of plunger of punch are realized and closed end of blank is shifted in direction opposite to that of fluid pressure action upon end of blank.

EFFECT: enlarged manufacturing possibilities of method.

19 cl, 12 dwg

FIELD: plastic working of metals, possibly manufacture of radially corrugated bellows type tubes.

SUBSTANCE: apparatus for shaping bellows type tubes includes lower die detachable along its axis and punch. On inner surface of die there are dents and indentations corresponding to profile of bellows. Punch is mounted stationary and it has annular grooves on lateral surface for placing elastic shaping members. Punch also has radial ducts whose number is equal to number of shaping members and axial ducts. Apparatus is provided with distributing unit. Each radial duct is communicated with pressure source through its own axial duct and distributing unit.

EFFECT: enlarged manufacturing possibilities, enhanced efficiency, simplified design of apparatus.

3 dwg

FIELD: processes and apparatuses for hydraulically expanding tubes.

SUBSTANCE: method comprises steps of creating pressure in supplied fluid with use of lubricating oil for hydraulic systems through fluid separator and hydraulic actuator. Apparatus includes fluid separator; pressure hydraulic actuator and probe with seals. Pressure is created in supplied fluid by means of fluid separator and pressure hydraulic actuator by means of lubricating oil for hydraulic systems. Main material of probe is 34CrNiMo6. Maximum number of expansions is determined while taking into account deformations of expanded tubes.

EFFECT: enhanced operational reliability of apparatus.

17 cl, 2 dwg

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