Forged pieces making method and forging complex for performing the same

FIELD: plastic metal working, namely production of forged pieces of ingots in forging complexes.

SUBSTANCE: method comprises steps of billeting ingot and forging it in several passes. Billeting is performed in four-striker forging apparatus for billeting ingots. At each unit reduction ingot is reduced in vertical plane at higher deformation degree than in horizontal plane. Forging complex includes forging press with movable tool table having several positions for changing forging tools. Tool has at least two four-striker forging device. Each device has four strikers secured to holders of upper, lower and lateral strikers. In first position of table four-striker forging device for billeting ingots is arranged. Angle between inclined surfaces in each holder of lateral striker of said device is in range 95 - 160°. Working surfaces of upper and lower strikers are longer than working surfaces of lateral strikers. When all strikers are in closed position, rectangle is formed in their cross section.

EFFECT: possibility for forging ingots with large cross section at improved efficiency.

6 cl, 7 dwg, 2 tbl, 1 ex

 

The invention relates to the field of metal forming, and in particular to methods produce forging of ingots for forging complexes consisting of hydraulic forging presses with one or two handles and equipped chetyrehpostovye forging devices.

The invention can be used in machine-building and metallurgical industry for the production of forgings of different cross sections of carbon and alloy steels, and alloys of ferrous and non-ferrous metals.

A known method of manufacturing forgings, including heating of the ingot and the subsequent forging it to the press with two handles in multiple passes through four-way compression in chetyrehpostovyh forging devices with additional macro shifts of the metal in the transverse plane of the workpiece at each single compression, filing and kantowski workpiece [1].

Use chetyrehpostovyh forging devices can significantly improve the performance of the process, the accuracy of the forgings and the yield of metal compared to traditional manufacturing processes of forging hammers and presses. However, this method does not provide a sufficiently high efficiency of the process and the yield of metal.

There is also known a method of manufacture of forgings, including the forging of sitkana press with one or two handles in several passes by pulling in chetyrehpostovyh forging devices with additional macro shifts of the metal in the transverse plane of the workpiece at every single quadrilateral the compression and calibration blanks, filing and kantowski, cutting forgings [2]. Use chetyrehpostovyh forging device allows to obtain high precision forgings.

However, the known method does not allow forging ingots of large cross-sections in chetyrehpostovyh forging devices. Therefore the initial forging of ingots is realized with two strikers, which reduces the efficiency of the process.

Known for forging complex containing a forging press with top and bottom plates for fastening the forging tool, equipped with locks to hold the tool, a movable tool table having several positions shift forging tools, forging tools, consisting of two or more chetyrehpostovyh forging devices strikers, positioned at the tool table, and two manipulators [1].

This forging complex provides significantly higher efficiency of the process compared to the use of automated forging complexes with traditionally used tool is flat and cut-out strikers.

The disadvantages of this forging complex is the low productivity of the process, as well as low accuracy and surface quality forgings circular cross-section.

Also known forging complex for the manufacture of forgings Ave the property of metals and alloys titanium subgroup, containing a forging press, a movable tool table having several positions of the shift of the forging tool, forging an instrument consisting of two or more chetyrehpostovyh forging device, positioned at the tool table, each of which consists of holders of the upper and lower forging dies with inclined surfaces, kinematically connected with them two brackets side Boykov with inclined surfaces corresponding to the inclined surfaces of the holders of the upper and lower forging dies attached to the holders of the heads, and one or two manipulators [2].

Known for forging complex provides a high yield of metal, precision forgings, as well as the surface quality of the forgings of large cross-section when making them mostly from metals and alloys titanium subgroup.

The disadvantages of the known forging complex are the low productivity of the process in the forging of large ingots, as well as the impossibility of forging ingots of large cross-sections without prior biliteracy their two strikers.

The objective of the invention is to develop a method of producing forgings and forging complex with special chetyrehpostovye forging devices for its implementation, providing the possibility of forging ingots of large cross sections in h is trehvalkovyh forging devices and improving the performance of the process.

The solution is achieved in that in the method of manufacturing of forgings including biliteracy ingot and subsequent forging press with one or two handles in several passes by pulling in chetyrehpostovyh forging devices and calibration blanks, filing and kantowski, cutting forgings, what's new is that biliteracy of the ingot is carried out in chetyrehsetovom forging device for biliteracy ingot, and the ingot, when every single compression, compresses in a vertical plane with a greater degree of deformation than in the horizontal plane.

The solution of the invention is also achieved by the fact that compression of the ingot in the vertical plane carried out with the degree of deformation 1.3-3.0 times higher than in the horizontal plane of the ingot.

The solution of the invention is achieved by the fact that after biliteracy ingot are drawn and calibration blanks in the second forging device in one set of universal cut-out strikers.

The solution of the invention is also achieved by the fact that the felling of calibrated workpieces produced in chetyrehsetovom forging device for biliteracy ingots.

In addition, the solution is achieved by the fact that in forging complex containing a forging press, a movable tool table that has multiple positions is the third change of the forging tool, as well as forging an instrument consisting of two or more chetyrehpostovyh forging device, positioned at the tool table, each of which consists of holders of the upper and lower forging dies with inclined surfaces, kinematically connected with them two brackets side Boykov with inclined surfaces corresponding to the inclined surfaces of the holders of the upper and lower heads, and four strikers attached to the holders of the heads, and one or two manipulators, new is that in the first position of the tool table is chetyrehballnoe forging device for biliteracy ingots, while the angle between the sloping surfaces each holder side striker this the device is 95-160°and working surfaces of the upper and lower heads of the longer working surfaces of the side Boykov and form in cross section, with the cloistered position of all Boykov, the rectangle with the ratio of adjacent sides of 1.1 to 3.0.

And, finally, the solution is achieved by the fact that in the second position the tool table is chetyrehballnoe forging device with a set of universal cut-out strikers for pulling and calibration blanks of circular cross-section, the working surface of each of which consists of a Central section with the concave is th surface, adjacent to two sides of the sections with convex surfaces and two flat side portions of the inclined surfaces, when this ratio is maintained

R/r=3-10,

where R is the radius of the concave surface of the Central section; r is the radius of the convex surfaces adjacent to the Central section.

Patented method of manufacture of forgings and forging complex for its implementation are explained figure 1-7.

Figure 1 presents the scheme of forging complex with two handles, a top view;

figure 2 is a front view on a forging press with three chetyrehpostovye forging devices;

figure 3 is a front view on a forging press in the position in which chetyrehballnoe forging device for biliteracy bars installed in the working area of the press;

figure 4 is a front view on a forging press with chetyrehochkovym forging device with a set of universal cut-out strikers;

figure 5 is a front view on a forging press with chetyrehochkovym forging device for biliteracy ingots at the time of compression of the ingot;

figure 6 is a front view on a forging press with chetyrehochkovym forging device at the time of compression of the wedge cut-out strikers;

7 is a front view on a forging press with chetyrehochkovym forging device for biliteracy ingots at the time of felling forging an axe.

Kovach is the first complex consists of a forging press 1, manipulators 2, 3, rolling tool table 4 multiple (3 shows) position change of the forging tools, forging tools (chetyrehpostovyh forging devices) 5-7, the control unit 8 (Fig 1). Chetyrehballnoe forging device 5 is attached to the top 9 and bottom 10 plates of a press and tool table with special locks (not shown) (figure 2). The number chetyrehpostovyh forging devices placed on the positions of the tool table before forging, is determined depending on the technological process. For the implementation of the patented method in the first position of the tool table 4 is chetyrehballnoe forging device 5 for biliteracy ingots (figure 2). Chetyrehballnoe forging device for biliteracy ingot consists of a holder 11 of the upper firing pin 12, a holder 13 of the lower firing pin 14, the brackets 15, 16 of the side of the heads 17, 18 (figure 3). In this case the angle between the sloping surfaces (angle α) each holder side striker this forging unit is 95-160°and the working surface of the upper 12 and lower 14 Boykov ("nm", "kf") longer than the working surface of the side of the heads 17, 18 ("nk", "mf"). Working surfaces of the heads 12, 14, 17, 18 form in cross-section, at the close position, the rectangle nmfk" with respect to adjacent sides of 1.1 to 3.0. On the second or the and the second and third positions of the tool table set forging device for pulling and calibration of the workpiece by a known method [2].

In addition, for the implementation of the patented method in the second position the tool table 4 can be located chetyrehballnoe forging device 6 with a set of known (flat or cut) for pulling the workpieces (1, 2). In this position the tool table can be placed forging device 6 with a set of universal cut Boykov 19-22 (1, 2, 4). These jaunty designed for pulling and calibration blanks of circular cross-section. The working surface of each cut-out striker consists of a Central section with a concave surface adjacent to two sides of the sections with convex surfaces and two flat side portions of the inclined surfaces, when this ratio is maintained

R/r-3-10,

where R is the radius of the concave surface of the Central section;

r is the radius of the convex surfaces adjacent to the Central region (figure 4).

The third position of the tool table 4 can be placed to another chetyrehballnoe forging device 7 for the formation of any special cross-sectional size along its entire length, or at separate sites, or only for calibration of forgings (figure 1).

The way in forging forging complex is as follows. Initially prepared to work forging complex. For this is th before hammering in the first position of the tool table 4 set chetyrehballnoe forging device 5 for biliteracy ingots, but on the second chetyrehballnoe forging device for pulling the workpiece to the required sizes of forgings (figure 1). If necessary, the third position third set of the forging device for calibrating the blanks. Immediately before the issuance heated to forging temperature of the ingot from the furnace by means of instrumental table 4 serves in the working area of the press 1 of the forging device 5 for biliteracy ingot (figure 2). With the remote control, press 8, the operator gives a command for fixing the upper movable part of the forging device to the top plate 9 of the movable beam press with special locks (figure 1 and 2). After performing these operations, forging complex is ready for operation.

Heated to forging temperature, the ingot is taken out of the heating furnace and using the pointing device 2 serves in a working zone of the press 1, which produces its biliteracy in chetyrehsetovom forging device 5 for biliteracy ingots (figure 1). In the process of biliteracy ingot, when every single compression, compresses in a vertical plane with a greater degree of deformation than in the horizontal plane (figure 5). After each single compression submit and the casting-off of the ingot around its longitudinal axis. Due to different degrees of deformation of the ingot (figure 5 compressed part of the cross-section of the ingot is shaded) in the vertical and izontally planes occur more macrodipole strain and provide a more intensive study of the cast metal structure. The combination of the method of forging ingot with increased reductions in the vertical plane and special design chetyrehvalkovoj forging device for biliteracy ingots allows forging ingots of large cross-section without changing the dimensions of the device and the working space of the press. Compression of the ingot in the vertical plane carried out with the degree of deformation 1.3-3.0 times greater than the compression in the horizontal plane of the ingot, i.e. perform ratio ε12=1,3-3,0, where ε1the degree of deformation of the ingot in the vertical plane, ε2the degree of deformation in the horizontal plane of the ingot. When the ratio of ε12<1.3 not provided intensive deformation study of cast metal structure and high quality metal forgings.

When the ratio of ε12>3,0 significantly decreases the performance of the forging process, which is also irrational. After biliteracy ingot in a forging device, the workpiece is removed from the working zone of the press, disconnect the movable part of the forging device 5 from the upper plate of the press 1 and remove this device from the working area of the press (1, 2). Then get into the working area of the press 1 chetyrehballnoe forging device 6 for pulling obtained after bilaterality workpiece, fix the device in the upper plate 9 press 1. Then continue forging billet forging device 6. The last, final, operation, calibration forging is performed in chetyrehsetovom forging device 7 for calibrating forging, after you install it in a working zone of the press (figure 2).

The feed of the workpiece after biliteracy in forging unit 5 for biliteracy ingots by the present method can also be implemented in the forging device 6 universal cut-out strikers 19-22 (4, 6). At the final stage of drawing the workpiece 23 (shaded its cross-section) is calibrated using the same universal cut-out strikers 19-22 in forging device 6 (6).

The obtained calibrated forgings are ready to perform the following operations - cutting, which separate the metal bottom and profitable parts of the ingot and, if necessary, cut the forging into pieces of desired length.

Through patent-pending method and cutting device can be produced in chetyrehsetovom forging device for biliteracy ingots 5 (1, 7). After installation in the working area of the press forging device for biliteracy bars 5 and its disclosure calibrated forgings 24 set in the desired position on the lower firing 14 (Fig.7). Then on top of forgings 24 put the axe 25 and introducing it into the body of the forging with the top what about the striker 12, by cutting. Side Boiky this device does not reach forgings and therefore do not interfere to make the process of logging.

In the patented forging complex at the first position of the tool table is chetyrehballnoe forging device for biliteracy bars (1, 2). In this device, the angle between the sloping surfaces of the side holders of the heads 15, 16 (angle α) is 95-160° (figure 3). In addition, the operating surfaces of the upper and lower heads of the longer working surfaces of the side Boykov and form in cross section, with the cloistered position of all Boykov, rectangle with related parties

l1/l2=1,1-3,0,

where l1=nm=kf; l2=nk=mf (figure 3).

This design of the forging device allows you to forge ingots of large cross-sections and get forgings of high quality.

When the angle α<95° not ensured high quality metal forgings and it is not possible to carry out biliteracy ingot of large cross-section.

When the angle α>160° not ensured high performance of the forging process.

When the ratio of the adjacent sides of the rectangle l1/l2<1,1 is not ensured high quality metal and is not always possible to promovate ingot of large cross-section.

When l1/l2>3,0 not obespecivaet the high productivity of the process.

The location of the second position of the tool table chetyrehvalkovoj forging device universal cut Boykov and the use of this device for pulling and calibration blanks significantly improves the performance of the forging process due to the intense axial extrusion billet feeding and rapid transition to its calibration, without loss of time to replace strikers. When R/r<3 clamps on the surface of the forgings at its pullback cut-out strikers.

When R/r>10 not provided with high precision forgings during calibration.

Example. Ingot weight of 10 tons with a maximum cross-sectional dimension of 905 mm of steel HNM heated in the gas chamber of the furnace to a temperature of 1180°and protovale the automated forging complex containing hydraulic forging press with force 18 MH, two synchronously operating with each other and with the press, forging manipulator, and equipped with two chetyrehpostovye forging devices.

While in the first position of the tool table was located chetyrehballnoe forging device for biliteracy ingots, and the second - chetyrehballnoe forging device with a set of universal cut-out strikers for pulling and calibration blanks.

The angle between the sloping surfaces each holder side striker chetyrehballnoe is the first forging device for biliteracy ingots was 125° and working surfaces of the upper and lower forging dies were longer working surfaces of the side Boykov 1.5 times.

In chetyrehsetovom forging device containing a set of universal cut-out strikers were stored ratio

R/r=5,

where R is the radius of the concave surface of the Central section;

r is the radius of the convex surfaces adjacent to the Central section.

The ingot was bilaterally in chetyrehsetovom forging device for biliteracy bars to the cross-sectional dimension of 680 mm When biliteracy ingot compression of the ingot in the vertical plane was carried out with the degree of deformation in 2 times more than the compression in the horizontal plane. Then took a forging device for biliteracy ingots from the working area of the press, established with the help of a tool table forging device with a universal cut-out strikers and continued forging in this device. When this first made the drawing of the workpiece cut-out strikers to a diameter of 310 mm Kontokali after each passage at an angle of 45° and the degree of deformation in each single compression 18-35%. The resulting billet with a diameter of 310 mm grooved in the same strikers for two passes to obtain a diameter of 300±1 mm In the calibration process the workpiece filed after each single compression on the value of 80-120 mm and centovalli on the goal of 10-15° . After calibrating forging replaced forging devices. Forging device with a universal cut-out strikers brought from the working area of the press, and in its place established a forging device for biliteracy ingots. Using this device, made cutting forgings by clicking on the axe top brisk.

The performance of the forging process was 12300 kg/h (on the finished forgings). Quality forgings meet the requirements of GOST.

For comparison for the base object adopted a method of manufacturing forgings and forging complex for its implementation, which is the prototype of the patented method.

This technology is heated to forging temperature, the ingot weighing 10 tons of steel 5 ChNM first pratoviale in the press with force 18 MN two flat strikers (billeterie), then in chetyrehsetovom forging device for rough forging four flat strikers, and then calibrated in chetyrehsetovom forging device for calibrating forging cut the strikers. The resulting forging is cut into the same press using two flat heads.

The performance of the forging process was 10120 kg/h

Thus, the performance of the forging process in comparison with the method and forging device adopted for the base object, increased by 21.5%.

In table 1 and table 2 shows the experimental data is, which confirm the efficiency claimed in the invention of the parameters (means and forging complex).

Thus, the method of manufacture of forgings and forging complex for its implementation, which claimed enhance process performance 7.2-21.5 per cent of obtaining high quality forgings, as well as the possibility of forging ingots of large cross-sections in chetyrehpostovyh forging devices.

Table 1
no experienceAttitude ε12Capacity, kg/hNote
11,2-Not provided as required by GOST quality metal
21,312200
32,012300
43,011600
53,29800
6 prototype-10120

Table 2
no experienceα, Cl1/l2 unitsR/r unitsCapacity, kg/hNote
1931,55-Not provided as required by GOST quality metal
2951,5512000
31251,5512300
41601,5510850
51651.5510080
61251,055-It is not possible to promovate
71251,1512100
81253,0510900
91253,1510100
101251,52,9-The clamps on the surface of the forgings
111251,51011400
121251,511-The forging was tolerances ±5 mm
13 prototype---10120

Sources of information

1. Lizorkin VA, Kushnir, Y., Tyurin VA, Zaluzhny YG, Kulikov V.A., Degtyareva T.V. improving the efficiency of the forging drawing blanks of special steels and alloys on the presses. / Press-forging production, 1994, No. 2, p.3-5/.

2. RF patent №2220020, MKI B 21 J 1/04, 9/02, 5/02, 2003

1. The method of manufacture of forgings including biliteracy ingot and subsequent forging press with one or two handles in several passes by pulling in chetyrehpostovyh forging devices and calibration blanks, feeding, kantowski and cutting forgings, characterized in that biliteracy of the ingot is carried out in chetyrehsetovom forging device for biliteracy ingot, and the ingot when every single compression compresses in a vertical plane with a greater degree of deformation than in the horizontal plane.

2. The method according to claim 1, characterized in that the compression of the ingot in the vertical plane carried out with the degree of deformation, 1.3-3.0 times greater than the degree of deformation in compression in the horizontal plane of the ingot.

3. The method according to claim 1 or 2,characterized in that after biliteracy ingot are drawn and calibration blanks in the second forging device in one set of universal cut-out strikers.

4. The method according to claim 1 or 2, characterized in that the cutting grooved billet produced in chetyrehsetovom forging device for biliteracy ingots.

5. Forging complex containing a forging press with a movable tool table having several positions of the shift of the forging tool, as well as forging an instrument consisting of two or more chetyrehpostovyh forging device, positioned at the tool table, each of which consists of holders of the upper and lower forging dies with inclined surfaces, kinematically connected with them two brackets side Boykov with inclined surfaces corresponding to the inclined surfaces of the holders of the upper and lower heads, and four strikers attached to the holders of the heads, and one or two of the manipulator, wherein in the first position of the tool table is forging chetyrehballnoe device for biliteracy ingots, while the angle between the sloping surfaces each holder side striker this device is 95-160°and working surfaces of the upper and lower heads of the longer working surfaces of the side Boykov and clicks the form in cross section with the cloistered position of all the heads of the rectangle with the ratio of adjacent sides of 1.1 to 3.0.

6. The complex according to claim 5, characterized in that the second position of the tool table is chetyrehballnoe forging device with a set of universal cut-out strikers for pulling and calibration blanks of circular cross-section, the working surface of each of which consists of a Central section with a concave surface adjacent to two sides of the sections with convex surfaces and two side portions with flat sloping surfaces, with sustained ratio:

R/r=3-10,

where R is the radius of the concave surface of the Central section;

r is the radius of the convex surfaces adjacent to the Central section.



 

Same patents:

Forging complex // 2243056
The invention relates to the processing of metals by pressure and can be used in the manufacture of forgings made of various steels and alloys forging ingots of various cross-sections

The invention relates to the processing of metals by pressure and can be used to obtain the forging of ingots and pre deformirovannykh billets for forging complexes

The invention relates to the processing of metals by pressure, namely, devices for counter-punching drums

The invention relates to mechanical engineering, in particular for forging machines

The invention relates to the processing of metals by pressure, namely, mechanical presses

The invention relates to forging and pressing machinery

FIELD: metal working by ultrasonic forging; manufacture of blades at enhanced technical and service characteristics.

SUBSTANCE: edge of plate is placed between taper surfaces of strikers located opposite each other for forming wedge-shaped blade and is subjected to deformation by ultrasonic forging. Plate is moved relative to longitudinal axes of strikers in transversal direction. Strikers connected with ultrasonic oscillation source are rotated about their longitudinal axes with the aid of drive. Taper working surface of each striker has recess whose generatrix corresponds to shape of surface of wedge-shaped blade.

EFFECT: improved quality of tool cutting edge; increased productivity; enhanced wear resistance of fittings.

19 cl, 9 dwg

FIELD: hot plastic working of metals, namely technological fittings for crank hot forging presses and steam-air hammers mounted in forging-forming shops.

SUBSTANCE: closed die set includes upper and lower halves and lower knocking out member. In lower half of die set there are compensators in the form of vertical slits having holes in their end portions and uniformly arranged around die set configuration. Knocking out member may be in the form of pushing core.

EFFECT: simplified design of die set, possibility for using low-waste forging processes realized in widely used standard equipment.

2 dwg

FIELD: plastic metal working, possibly in forging shops of metallurgical and machine engineering plants for making motor vehicle wheels and similar products.

SUBSTANCE: tool includes die, punch mounted in slide of press and shape part of knocking out member, both movable along die; annular pressure yoke and annular stop. Yoke has stepped cylindrical outer surface and through opening whose diameter corresponds to that of punch. Annular stop has through stepped opening. Upper step of die opening is cylindrical one and it has diameter corresponding to outer diameter of lower step of pressure yoke. Stepped opening of annular stop has lower step with diameter less than diameter of upper step of said opening and less than outer diameter of upper step of pressure yoke. Height of said step is less than depth of upper step of opening of annular stop.

EFFECT: enhanced geometry accuracy of semi-finished products of wheels.

2 dwg

FIELD: plastic working of metals, possibly in forging shops of metallurgical and machine engineering plants for making automobile wheels and similar products.

SUBSTANCE: tool includes die with through round stepped hole having upper large-diameter step; punch mounted on slide of press and shaped part of knocking out member, both mounted with possibility of motion along axis of die. Tool also includes unit for stepwise regulation of bottom thickness and height of cup. Said unit includes clamping round stepped yoke secured to slide and embracing upper part of punch and also upper and lower spacing rings. Upper spacing ring is arranged between upper end of large-diameter step of yoke and press slide, lower spacing ring is arranged under shaped part of knocking out member. Upper step of die hole is cylindrical one, its diameter corresponds to outer diameter of yoke step turned downwards. Shaped part of knocking out member, upper and lower spacing rings are changeable ones.

EFFECT: enlarged manufacturing possibilities of tool due to possibility for making semi-finished products of wheels of different types and dimensions.

2 cl, 1 dwg

FIELD: plastic working of metals, namely production of nano-crystalline materials with improved degree of mechanical properties.

SUBSTANCE: die set includes deforming unit with inlet and outlet ducts of the same rectangular cross section and ram. In first variant of invention deforming unit is in the form of two parts with crossing planes. Crossing planes of first part having grooves are connected with crossing planes of second part. Inlet and outlet ducts are restricted by said grooves and partially by crossing planes of second part. In second variant of invention deforming unit is in the form of two plates and two other parts. Thickness of each plate is equal to dimension of side of rectangular cross section of inlet and outlet ducts; each plate has two crossing planes. Said plates are mutually joined by means of two other parts according to condition of arrangement of two crossing planes of first plate opposite to two crossing planes of second plate. Inlet and outlet ducts are restricted by means of two crossing planes of first plate, two crossing planes of second plate and partially by planes of other parts.

EFFECT: enhanced operational reliability of die set, improved quality of formed product.

5 cl, 9 dwg, 1 ex

FIELD: plastic working of metals, possibly manufacture of parts with shaped contour, for example polyhedral parts.

SUBSTANCE: method comprises steps of forming round cross section semi-finished product; embossing its surface for forming relief in the form of alternating protrusions and recesses and shaping curvilinear contour of said relief. Size of shaped contour corresponds to size of profile of ready part. Diameter of described circle passing through apexes of curvilinear protrusions is selected in range consisting of (1.15 - 1.35) of diameter of inscribed circle passing through apexes of recesses of part. Curvilinear contour of protrusions and recesses is shaped due to acting upon semi-finished product by means of shaping tool having profile of working surface in the form of curvilinear protrusions. The last have curvature radius with curvature centers spaced from part symmetry center by distance exceeding by 1.65-1.8 times distance from said symmetry center till curvature centers of curvilinear protrusions of part. Curvilinear recesses are alternated with curvilinear protrusions on working surface of shaping tool. Diameter of described circle passing through apexes of said recesses consists (1.15 - 1.35) of diameter of inscribed circle passing through apexes of curvilinear protrusions.

EFFECT: enlarged manufacturing possibilities of method and apparatus.

8 cl, 8 dwg

FIELD: plastic metal working with use of plastic deformation, namely manufacture of nano-crystalline materials with improved mechanical properties.

SUBSTANCE: die set includes bandage to which cone insert having four parts is pressed -in; lower support; inlet and outlet ducts of the same rectangular cross section; and ram. Parts of cone insert are made in such a way that they are defined by two mutually crossing planes and by portion of cone surface cut off by said planes. Rib formed by means of two mutually crossing planes in each part of cone insert is cut off by such a way that assembled parts of insert define inlet duct with three portions. Two portions have rectilinear walls; one portion has helical walls. The last portion is arranged between said portions with rectilinear walls. Outlet duct is restricted by lower support and by two adjacent parts of cone insert having grooves in its lower end.

EFFECT: enhanced intensity of plastic deformation of metallic blank, simplified design and increased useful life period of die set.

7 dwg

FIELD: plastic metal working with use of intensive plastic deformation, namely manufacture of nano-crystalline materials with improved degree of mechanical properties.

SUBSTANCE: die set includes slider and plate restricting inlet duct; stationary stop closing inlet duct and restricting together with plate outlet duct; ram and member for knocking out blank. Said member is joined with motion drive unit and it is mounted with possibility of introducing into additional through duct formed in slider. According to first variant of invention at initial position of slider its through duct is arranged in front of outlet duct. Slider may be shifter before starting pressing process by value exceeding size of through duct. According to second variant of invention through duct of slider is arranged in front of outlet duct in lower limit position of slider. Said cone-shape through duct of slider is closed by means of plug pressed-in to it.

EFFECT: improved design providing possibility for extracting last blank out of outlet duct before starting pressing of next lot of blanks.

2 cl, 5 dwg

FIELD: metallurgy; metal plastic working.

SUBSTANCE: invention can be used in form forging shops of metallurgical and machine-building plant in manufacture of vehicle wheels and like articles. Proposed tool contains die and punch holder with punch and knock-out with shaped part movable relative to die. Punch is enclosed by replaceable round holder with support flat and support surface. Die is provided with socket in upper part whose diameter corresponds to outer diameter of holder, and with support flat. Holder is installed for longitudinal displacement and engagement by its support flat and support surface with support flat of die and with punch holder, respectively. Shaped part of knock-out is made replaceable to provide possibility of making wheels of different type-sizes using one tool.

EFFECT: enlarged operating capabilities.

2 cl, 2 dwg

FIELD: plastic working of metal, possibly in forging shops of metallurgical and machine engineering plants for making wheels of automobiles and similar articles.

SUBSTANCE: tool includes die, punch, knocking out member with shaped portion, unit for stepped regulation of bottom thickness and height of cup. Said unit is in the form of apparatuses for changing length of punch and depth of die. In upper part of punch female type yoke with through stepped opening is mounted. In upper part of die there is seat whose diameter dimension corresponds to outer diameter of yoke. Depth of die is changed by means of apparatus in the form of flat ring arranged over shaped portion of knocking out member. Apparatus for changing length of punch is in the form of flat round gasket arranged inside yoke over punch. Punch has in its upper portion large-diameter step corresponding to diameter of large step of yoke opening.

EFFECT: possibility for producing by means of one tool semi-finished products of wheels with different combinations of width and thickness values.

3 cl, 3 dwg

FIELD: plastic working of metals, possibly in forging press shops in machine engineering enterprises for making parts by sheet forming with use of ingots of own production.

SUBSTANCE: method comprises steps of plastically deforming ingot by forging in four-striker device in forging press at forging reduction ratio 1:2 -1:5 till producing forged piece with diameter d =(0.2 - 0.8)d1 where d, d1 -diameters of forged piece and blank for sheet forming at allowance for working respectively. The forged piece is cut normally to its lengthwise axis by blanks multiple to several blanks for sheet forming. Prepared blanks are heated till temperature of plastic deformation, upset till diameter d1, annealed and turned according to diameter of round blank for sheet forming, Then blanks are cut normally to their lengthwise axis by measured blanks for sheet forming.

EFFECT: improved factor of metal using, simplified process.

1 ex, 1 tbl

Ring making method // 2286862

FIELD: plastic metal working.

SUBSTANCE: invention can be used in metallurgy and aircraft industry at manufacture of important parts, mainly, parts of gas-turbine engines. According to proposed method, blank is subjected to cross upsetting to form plate. Then plate is installed in flat dies with provision of vertical direction of plate material fiber and is subjected to spinning to form disk. After spinning, blank is turned over, its end surfaces are leveled, blank is broached and rolled to final sizes.

EFFECT: improved physical and mechanical properties of article in direction of action of maximum loads in operation.

3 cl, 1 ex, 1 tbl

FIELD: plastic working of metals, in particular, production of forged pieces with elongated axes from ingots and preformed blanks.

SUBSTANCE: method involves forging preliminarily heated blank in several stages combined with squeezing in two mutually perpendicular planes in four-striker forging apparatus. Each of upper and lower strikers of four-striker forging apparatus has two working portions divided by cuts. Each of two lateral strikers has one working portion extending into cuts of upper and lower strikers. First stage includes forging process performed in several passes combined with squeezing in vertical plane, with squeezing force of said processes exceeding squeezing force applied in horizontal plane by 20-80%, tilting after each squeezing process and feeding. Feeding value is defined from cited ratio. Second stage includes forging process combined with squeezing processes of equal force in two mutually perpendicular planes until blank surface is leveled.

EFFECT: improved quality of metal of forged pieces.

2 cl, 1 tbl, 1 ex

FIELD: plastic working of metals, namely manufacture of shaped blanks of axles of undercarriage of rolling stock.

SUBSTANCE: method comprises steps of making rough blank from ingot; then forging rough blank for making shaped blank. Rough blank is forged during several passes. Forging operations for making rough blanks and forging operation for making shaped blank are realized in four -striker forging apparatus by squeezing at shear deformations in cross plane of blank during each single squeezing. Single squeezing stages during first three forging passes at making rough blank are realized at displacing metal between strikers and then squeezing said portions of blank in radial direction. Four-side radial squeezing operations are realized for making shaped blank.

EFFECT: improved efficiency of method.

1 tbl, 1 ex

Up!