SU1662734A1 - Die for making parts - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to the die tooling used for the manufacture of products with a periodic profile. The purpose of the invention is to increase productivity in the manufacture of parts such as gears. The stamp comprises an upper plate with fixed core and hollow parts of the punch and pushers and clamps installed in its cavities, a lower plate with guides, clamps, lower punch, an intermediate plate with a matrix insert and a matrix. In the stamp, the working surface of the hollow part of the punch is made in the form that coincides with the working surface of the die, and is set with projections opposite the depressions of the latter. The stamp provides that the compression force of the pusher springs should be greater than the compression force of the springs acting on the intermediate plate. During the reverse course of the top plate, the intermediate plate rises under the action of springs and is brought to its original position. Thereafter, the forging is pushed by the action of the ejector onto the lower punch. 2 Il.

Description

The invention relates to the processing of metals by pressure, in particular to the die tooling used to make bevel gears.

The purpose of the invention is to increase productivity in the manufacture of parts such as gears.

Figure 1 shows the stamp in the initial state after loading the blank (left) and before its deformation (right), a longitudinal section; Fig. 2 is the same after forming the forging (left) and pushing it out (right).

The stamp comprises an upper plate 1 with a core 2 fixed on it and a hollow 3 parts of the upper punch with a clamp 4 and pushers 6 and springs 7 installed in a closed ring 5 of its cavities, a lower plate 8 with a centering cavity A, with guides 9, springs 10, lower punch 11, stop 12, lower ejector 13, intermediate plate 14. In the intermediate plate 14, the upper 15 and lower 16 parts of the band are installed, the matrix insert 17, the matrix 18 and the stop 19. The working surface of the hollow 3 part of the upper punch is made according to matching form with the working surface of the matrix 18 and mounted with protrusions and opposite the cavities of the matrix b. In the plate 1 the upper ejector 20 is also mounted. The spring-loaded intermediate plate 14 is held in the upper fixed position by screws 21

The stamp works as follows.

Pre-heated billet 22 is installed in the cavity of the matrix 18 (figure 1 left). During the working stroke of the press, the slider together with the plate 1, moving downwards, inserts a punch into the matrix insert.

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the workpiece enters the cavity of part 3 of the punch and during the further press before the forming process begins, the workpiece is symmetrically placed relative to the working surfaces of the die and the punches (Fig. 1 on the right) due to the pressing of the intermediate plate 14 to the bottom plate 1 under the action of the pushers 6 compressing the springs 10 and then the process of forming the forging begins, which ends when the press slider reaches the lower fixed position (Fig. 2, left). During the return stroke of the press ram, the upper plate 1 rises up and the upper punch connected with it, the intermediate plate 14 is brought to its initial position by the action of the springs 10. Then, using a special device with pneumatic, hydraulic or mechanical drive (not shown), the lower ejector 13 is lifted, acting on the lower punch 11, which removes the forging 23 from the forming die cavity (Fig. 2, right). After removal of the forging from the die zone, the ejector 13 is lowered by relieving the loads acting on it from said special device, and the die is brought to its original position. When working out the extrusion process of the forging 23, it is possible to remove it from the die cavity together with the upper punch and to separate it from the punch, it is provided to actuate the upper ejector 20 using a special device with pneumatic or hydraulic drive.

Claims (1)

Claims for obtaining parts comprising an upper and a lower plate, an intermediate plate, spring-loaded relative to the lower plate, a matrix with a working surface fixed to the intermediate plate, and also a punch mounted in the lower plate and an ejector, characterized in that increase productivity in the manufacture of parts such as gears, it is equipped with a punch mounted in the top plate and made consisting of a central core part and covering its hollow part with a profile This working surface in the form of radially alternating protrusions and depressions, the working surface of the die is also made in the form of radially alternating protrusions and depressions, while the protrusions of the working surface of the hollow part of the punch are located opposite the depressions of the working surface of the die, the intermediate plate is spring-loaded pushers whose force of compression of the springs exceeds the force of compression of the springs placed between the intermediate and lower plates. 7 12 W 13 (rig.1 (Reg. 2 Yu