SU897374A2 - Method of upsetting beads on rods - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used for die casting of forgings with spikes. According to the main author. St. No. 659265, there is a known method for disembarking bulges on rods, according to which a part of the billet is bent down, a corresponding process, and a thickening is obtained by planting another part of the billet. To provide a single junction of thickenings, a fixed non-deformable part is carried out, and in case of a thickening set, the support of the disembarked portion is provided by the action of the opposing punch, installed in a coaxially outboard joint venture. However, by a known method it is impossible to obtain forgings with two processes that are displaced along the axis of the thickened middle part. The method does not allow forming the middle thickened part of one transition, especially if the length is suspended. exceeds the middle part, 5 (d is the diameter of the workpiece). The purpose of the invention is to provide a single junction design of forgings with two processes displaced along the axis of the thickened middle part. The goal is achieved by the fact that the set of thickenings is carried out by applying a deforming force to the parts of the workpiece adjacent to the middle part, with the same directional support of the parts, opposite W (to their curved processes. And the parts are supported. The preparations are made from both ends at a length corresponding to half the length of the planting part. In Fig. 2 schematically shows the process of making a forging with two processes; Fig. 2 shows section A-A in Fig. 1. At the core blank 1, sections corresponding to the processes are bent. for-. {Hidden punch with a split matrix

(design features of the stamp in Fig. I are not shown). The parts of the workpiece corresponding to the processes are clamped so that one process appears in the half-matrix 2, and the second. In the half-matrix 3. During the course of the stroke, the punches 4 and 5 move in opposite directions on the parts of the workpiece adjacent to the processes. Simultaneously with the punches 4 and 5, semi-triangular 2 and 3 move. The semi-matrix 2 and 3 on the inner side have longitudinal projections and depressions, the surfaces of which serve to support the opposite parts of the planted middle zone. On punches 4 and 5 profiles are made, negative profiles m on semi-matrix 2 and 3.

Under the action of the punches 4 and 5, the central part of the workpiece is deformed and fills the cavity formed by semi-matrix 2 and 3. Since j the bent ends of the workpiece are placed in the corresponding cavities of semi-matrix, they are installed with the possibility of oncoming movement, synchronous movement of the punches 4 and.

The simultaneous impact on the workpiece punches 4 and 5 and the contacting of the parts of the workpiece that are opposite to the processes with the protrusions (surface B in Fig. 2) eliminates the loss of stability of the middle (landed) part of the workpiece and provides high-quality shaping of the thickened part of the forging. If the ends of the forging protrude above the processes, then the puffs 4 and 5 are made with the possibility of movement relative to the punch holders (not shown in FIG. I), i.e. are floating. The protrusions on the semi-matrixes are made so that their ends coincide with the ends of the forging.

During the return stroke of the press ram, the punches 4 and 5 revert to the original

position, and when the semi-matrix 2 and 3 depart, the forging 6 is pushed out of the stream. The proposed method has a number of advantages in comparison with the known ones, namely, it provides a reduction in the production cycle due to the possibility of forming the middle part of the forging in one transition.

The method was tested in relation to the preparation of blanks for tractor parts. It can also be used to obtain various parts (blanks) with processes located at angles other than direct in mechanical engineering and instrument-making, in the production of consumer goods.

Claims (2)

1. The method of landing the bulges on the rods x aut. St. No. 659265, characterized in that, in order to achieve the possibility of making forgings with two processes displaced along the axis of the thickened planted middle part, in one transition, the metal is thickened by applying a deforming force to the parts of the workpiece adjacent to the middle part simultaneous back-up of parts opposite bent shoots. 2. A method according to claim I, characterized in that the support is provided at both ends in a length corresponding to half the length of the disembarked part. Sources of information taken into account in the examination 1. USSR author's certificate W 659265, cl. B 21 3 5/08, 15.06.79.