SU709232A1 - Method of making forgings - Google Patents

Description

(54) METHOD OF MANUFACTURING OF FORCES

I

The invention relates to the processing of metals by pressure, namely, to methods for manufacturing. laziness forgings without overlap on punching slopes.

There is a known method of making forgings without overlaps on mTaN noBOHHbie slopes by stamping a hollow billet in the shape of a truncated cone and pushing it through the matrix 1.. The disadvantage of this method is the low quality of forgings due to the bending of the end parts of the blanks.

The purpose of the invention is to improve the quality of products.

This is achieved by the fact that in the proposed method, before pushing the workpiece through the matrix, the wall of the workpiece at its larger base is pre-bent.

FIG. I shows the position of the workpiece and the parts of the punch at the time of the beginning of the bending of the larger base; in fig. 2 - the same, at the time of the end of the bend; in fig. 3 - at the moment of the start of pushing the workpiece onto the die; in fig. 4 - at the time of completion of processing the blanks. The method is carried out in

a two-punch die containing a matrix I for trimming a burr and bending inside the large base of the workpiece 2, a matrix 3 for pulling, an ejector 4, a punch 5 of pulling, an elastic element 6, a ring 7 and a piercer 8.

The method is carried out in the following sequence. First cut the burr. Then bend the larger base inward. By partially pushing the workpiece into the matrix with a large base. Bending is completed at the moment when the outer diameter of the larger base of the workpiece becomes equal to the outer diameter of the smaller base or the required diameter of the finished forging. After this, the workpiece is pulled over the bottom part or jumper, thereby acting on the end of the workpiece with a pushing force. The pushing force is provided by an elastic element (buffer) or a rigid step of the punch npoTflpHBafmH located at the height occupied by the end of the workpiece after bending the base. 3 At the final moment, the hole is pierced. Example. Punching slopes were removed on technical blanks: and pure lead, having the following dimensions, mm: diameter of the larger base 110.0, diameter of the smaller base 106, wall thickness 6.0, height 25.0. The angle of taper of the matrix for pushing and pulling is accepted. I The processing according to the proposed method was carried out in two stages: bending the larger base to 106.0 mm and pulling with pushing until a cylindrical form was obtained. The use of the proposed method for the manufacture of forgings without allowances on stamping slopes provides an improvement in the quality of the forgings by eliminating the danger of formation of f Ul .1

Claims (1)

FIG. Z vani face burr and a significant reduction in the distortion of the profile of the outer generatrix. Claims The method of manufacturing forgings without overlaps on punching slopes is by punching a hollow billet in the shape of a truncated cone and pushing it through a matrix, characterized in that, in order to improve the quality of products, before pushing the billet through the matrix, the wall of the billet is pre-bent at the larger base. Sources of information taken into account in the examination 1. Atlas V. A., Babenko et al. Die stamping. M., 1965, p. 19, fig. 504.  five