Forging four-striker apparatus

FIELD: plastic working of metals, possibly forging ingots and billets in hydraulic forging presses.

SUBSTANCE: apparatus includes two holders of upper and lower strikers having inclined surfaces. Said holders are kinematically coupled with two holders of lateral strikers having inclined surfaces corresponding to those of holders of upper and lower strikers. Four strikers are secured to respective holders by means of clamps and tightening studs. Each of upper and lower strikers has two working portions mutually divided by cutout. Each of lateral strikers has one working portion entering cutouts of upper and lower strikers. At least one adjusting plate is placed between holder of lower striker and lower striker. Lower striker is secured to its holder by means of two Г-shaped clamps. Inclined surfaces of said clamps are forced to inclined surfaces of holder of lower striker; riffled surfaces of said clamps are forced to two friction plates arranged on lateral surfaces of lower striker. Pins passing through openings of adjustment plates and entering openings of holder of lower striker are mounted in lower striker.

EFFECT: lowered cost of making tool, reduced time period for readjustment of it.

2 cl, 5 dwg

 

The invention relates to the field of metal forming, namely chetyrehochkovym forging devices, and can be used in the forging of ingots and billets on hydraulic forging presses.

It can be used in machine-building and metallurgical industry for the production of forgings and products with a long axis of the circular, square and rectangular cross-section of the structural, tool, stainless, heat resisting and other hard steels and alloys.

A well-known tool for band-pass radial forging blanks, consisting of four strikers, two of which have two working area on each firing, split neckline, and two others - one job site, entering the slots of the first pair of strikers (Forging on radial crimp machines. Vautrin, Vasaparken, Iaspei, etc. Under the General editorship Vaulina. M., engineering, 1990, s-16).

This tool ensures forging of rectangular cross section in a wide range of sizes high quality radial forging machines, which is provided for adjustment of the closed height of the heads.

The disadvantage of this tool should include the inability to use it in a well-known chetyrehpostovyh forging devices on hydraulic forging presses with the same effect, that and radial forging machines. This is because in chetyrehpostovyh forging devices used on hydraulic forging presses, there is no regulation of closed height Boykov separately for each pair of strikers. Therefore, using this tool in this chetyrehsetovom forging device, you can get forgings rectangular cross-section only in a narrow range of sizes.

It is also known chetyrehballnoe forging device consisting of two brackets 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 Boykov using clamps and tie rods (patent of Ukraine No. 34978 A, class B 21 J 1/04, B 21 J 13/02. Publ. in the Bulletin of Fig. No. 2, 2001).

A disadvantage of the known device is that it does not provide for adjustment of the shut height of the heads, and therefore, it cannot produce forgings of rectangular cross section in a wide range of sizes in one set of strikers.

The invention solves the problem by changing the design chetyrehvalkovoj forging device to provide a forging of rectangular cross section in a wide the range of sizes using a single set of Boykov, which in turn will reduce the cost of manufacture of the tool and reduce the time for changeover.

The technical result is achieved by the fact that in chetyrehsetovom forging device consisting of two brackets 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 Boykov using clamps and tie rods, two of which, the upper and lower jaunty, have two working area on each firing, split neckline, and the other two side striker have one job site, entering the notches of the upper and lower forging dies to extend the range of cross sections of workpieces according to the present invention between the holder bottom firing pin and lower the striker has one or more adjustment plates, the lower die is attached to the lower holder striker with two l-shaped clamps, which, on the one hand, their inclined surfaces pressed against the inclined surfaces of the lower holder striker, and with the other hand to the two friction plates fixed to the side surfaces of the lower firing pin. In the lower fixed firing pins passing through the TVersity adjustment plates, and included in the holder opening of the lower firing pin, and intended for centering the adjustment plates.

The achievement of the technical result is strengthened by the fact that the friction plate is made of copper.

The design variant of the inventive chetyrehvalkovoj forging device represented in figure 1-5.

1 schematically shows chetyrehballnoe a forging device in a static state, a front view;

figure 2 - cross section A-a in figure 1;

figure 3 - chetyrehballnoe forging device during the formation of the forging of rectangular cross-section (shown shaded cross-section forgings);

figure 4 is a graph of a function A=f () for a set of strikers without adjusting the elevation of the lower firing pin, where a is the strip thickness, strip width;

figure 5 - graphs of functions A=f (), A=f’(C) for a set of heads with adjustable height of the lower firing pin.

Chetyrehballnoe forging device consists of a holder top striker 1, the holder bottom striker 2, the brackets of the side of the heads 3, 4, the upper firing pin 5, the lower firing pin 6, the side of the heads 7, 8, guides 9-12 (figure 1). Boiky attached to the holders of the heads with the help of clamps 13 istinic studs 14. Between the lower holder striker 2 and the lower brisk 6 has one or more adjustment plates 15 (figure 2). Clamps 13, holding the lower die 6, to them who are of l-shaped form (figure 2). On the one hand clamps 13 their inclined surfaces pressed against the inclined surfaces of the lower holder striker 2, and on the other hand grooved surfaces on the friction plates 16, fixed with screws on side surfaces of the lower firing pin 6 (figure 2). At the bottom of the striker 6 is fixed pins 17 which pass through the holes in the adjusting plate 15 and go (on a sliding fit in the holes of the holder bottom striker 2 for centering the adjustment plates 15 (figure 2). In addition, the pins 17 hold the lower die 6 from moving in the direction of the longitudinal axis relative to the holder bottom striker 2 when crafting. Of the four known 5-8 attached to the holders Boykov 1-4 using clamps and studs, two upper and lower Boiky have two working area on each firing, and the other two side striker have one job site, entering the notches of the upper and lower forging dies (1, 2).

Work chetyrehvalkovoj forging device is as follows.

Chetyrehballnoe forging device, assembled for the particular size of the forging of rectangular cross section, is installed in the working space of the press and include the press. When raising the movable beam press with the upper plate up holder top striker 1, attached to the top plate of the press, also remedies together with the upper brisk 5 up. Simultaneously with the guide 9-12 holder top striker 1 divorces holders side Boykov and 3.4 together with the side strikers 7, 8, opening the workspace of the device (Fig 1, 3). Then the workpiece manipulator served in the active area of the device. After that include the working stroke of the press, in which its movable yoke moves the upper holder 1 striker with the striker 5 in the direction towards the workpiece (shown shaded cross-section) and with the striker 6 compresses it in the vertical plane (figure 3). Simultaneously with the inclined surfaces of the upper holder 1 striker moves toward the workpiece holders 3, 4 side of the heads 7, 8, which compresses it in radial and tangential directions. After the compression of the workpiece traverse the press moves up, revealing the device, and the compression cycle is repeated.

If you wish to produce forgings of rectangular cross-section other sizes on command from the remote control, press a device is disconnected from the upper beam of the press. Using the tool table of the forging device is removed from the working zone of the press. Then, removing the tie rods 14, remove the l-shaped clamps 13, holding the lower die 6, raise this head and change the adjustment plate 15 (Fig 1, 2). Then head 6 space the Ute on the adjusting plate 15, install the l-shaped clamps 13 which, on the one hand, their inclined surfaces pressed against inclined surfaces of the lower holder striker 2, and on the other hand, their grooved surfaces on the friction plates 16 by means of the tie rods 14 (Fig 1, 2). The friction plate 16 is installed in grooves made on the lateral surfaces of the lower firing pin 6, and is fixed with screws (figure 2). For centering the adjustment plates 15 are provided guide pins 17, which are fixed (pressed) at the bottom of the striker 6. After you install the necessary adjustment plates 15 die 6 is lowered to contact with the adjusting plates. This guide pins 17 go into the holes of the adjusting plate 15, aligning them, and then into the holes in the holder bottom striker 2. Pins 17 hold the lower die 6 from moving it relative to the holder bottom striker 2 for large axial loads (figure 2). The friction plate is made of a soft metal, for example copper. When tightening bolts holding the l-shaped clamps 13, the last of their corrugated surfaces embedded in soft friction plate, thus creating a strong bond with them, to prevent vertical displacement of the bottom firing pin 6 (figure 2).

In one set of strikers without height adjustment lifting the lower boik what you can get forgings, dimensions of cross-sections which are located on the graph of the function A=f(B), depicted in figure 4. The thickness of the strip may vary from size And1to size and band width - sizeaboutto the size of the B1(figure 4).

In the inventive forging device with adjustable height of the lower firing pin due to the adjustment plates can be obtained forgings, dimensions, cross-sections which are located between the graphs of functions A=f (), A=f’(C) in the shaded area (figure 5). Size Δ=A2-A1corresponds to the maximum value of the ascent of the lower firing pin with the adjustment plates.

Thus, in the present invention by changing the closed height of the heads is possible to produce forging of rectangular cross-section in a wider range of sizes in one set of strikers compared to chetyrehochkovym forging device, taken as a prototype. This reduces the cost of manufacturing the tool, as well as reduce the time for readjustment when changing from one size of the stripes on the other 30-40%.

1. Chetyrehballnoe forging device containing two holders top and bottom heads with inclined surfaces, kinematically associated with two holder side Boykov with inclined surfaces corresponding to nuklon the m surfaces of the upper and lower holders Boykov, and four firing pin attached to the holders Boykov using clamps and tie rods, two of the heads of the upper and lower have two working area on each of them, separated by a neck, and the other two side striker have one job site, entering the notches of the upper and lower forging dies, characterized in that between the lower holder striker and lower the striker has one or more adjustment plates, the lower die is attached to the lower holder striker with two l-shaped clamps, which on the one hand their inclined surfaces pressed against the inclined surfaces of the holder the lower firing pin, and on the other hand their corrugated surfaces of the two friction plates fixed to the side surfaces of the lower firing pin, while the lower fixed firing pins passing through holes in the adjusting plate and coming into the holder opening of the lower firing pin.

2. The device according to claim 1, characterized in that the friction plate is made of copper.



 

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