Production method and upsetting equipment of half-shell with high dimensional accuracy

Abstract

The invention relates to a method for the production of deep-drawn half-shells (2, 42) with high dimensional accuracy, which have a bottom area (3) and side frames (5) and optionally have convex rim (44), wherein the half-shells (2, 42) prefabricated from blank sheets are formed into finished half-shells, wherein the prefabricated half-shells have a stock allowance due to their geometry, and the prefabricated half-shells (2, 42) , 42) In the process of forming the finished half-shell, due to the blank margin, the half-shell (2, 42) is upset in the upsetting equipment through at least one forging process to form the finished half-shell. Since the size of the upsetting gap (38, 76) is reduced to the actual wall thickness of the side frame of the prefabricated half-shell when the upsetting device (4, 40) is closed, it is achieved by the method described above. The object of the method and the device which can improve the reliability of the process in the production process. In addition, since two side walls (18, 20, 56, 58, 80, 82) are provided, the two side walls (18, 20, 56, 58, 80, 82) and the second device half (8, 48 ) The bottom area (14, 54) of the forging die (12, 52) forms the corresponding die together and the two side walls (18, 20, 56, 58, 80, 82) can be along relative to the forging punch The moving direction of (10, 50) moves in a vertical or oblique direction, so the upsetting equipment according to the present invention achieves the above object.

Description

technical field [0001] The invention relates to a method for the production of deep-drawn half-shells with high dimensional accuracy, which have a base area and side frames and optionally flanges, wherein the half-shells prefabricated from blanks are formed into finished products Half-shells, in which the prefabricated half-shells have a stock allowance due to their geometrical shape and which undergo at least one forging operation in an upset forging plant during the formation of the finished half-shells from the prefabricated half-shells due to the stock allowance The half-shells are upset to form the finished half-shells. Furthermore, the invention relates to an upsetting plant for producing half-shells with high dimensional accuracy, said upsetting plant having at least a first plant half and a second plant half, the first plant half having an upsetting punch head, the shape of the upset punch corresponds to the inner contour of the finished half-shell, the second device ...

AI Technical Summary

Problems solved by technology

However, in actual production, the blank does not always have a uniform thickness, so there is a certain tolerance in the material thickness of the half-shell after the deep drawing process, at least in the side frame area

But in the above method, the half-shells with the above tolerances cannot be perfectly calibrated in their circumferential direction

Specifically, the flange area (if there is a flange) and the side frame area of ​​the upsetting material will have an undesired wrinkled shape during the upsetting process. Aspects reduce local dimensional accuracy

Furthermore, problems arise in the machining of half-shells with low springback due to the springback of the prefabricated half-shells and the resulting lower dimensional accuracy of the prefabricated half-shells

Images