Automobile differential mechanism front shell forging flashless hot die forging forming process

Abstract

The invention discloses an automobile differential mechanism front shell forging flashless hot die forging forming process. The automobile differential mechanism front shell forging flashless hot dieforging forming process comprises the technological forming steps of blank preparation, primary upsetting, secondary upsetting and final forging, wherein a blank is fed into a primary upsetting die, the formed rod part of the blank is fed into a lower die cavity of the primary upsetting die, the head of the blank is fed into an upper die cavity of the primary upsetting die, the formed rod part ofthe blank does not participate in upsetting at all, the head of the blank is subjected to upsetting, and the blank is subjected to upsetting to form a primary upsetting part; in the secondary upsetting process, the primary upsetting part continues to be subjected to upsetting and is fed into a secondary upsetting die, and a secondary upsetting part is obtained by conducting upsetting on the primary upsetting part; and in the final forging process, the secondary upsetting part is fed into a final forging die and is subjected to upsetting to form a forged part. According to the automobile differential mechanism front shell forging flashless hot die forging forming process, the two-step forming upsetting process is adopted to meet the requirements for ingredient distribution of the forged part, and flashless forging forming of large shell parts with complex structures is realized. The automobile differential mechanism front shell forging flashless hot die forging forming process has the advantages that the dies are simple in structure, the forged part is good in fullness and free of defects such as wrinkles and errors, and operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of forging, and relates to a flash-free hot die forging forming process of a front shell-like forging of an automobile inter-axle differential. Background technique [0002] Refer to the process steps of the hot die forging forming process for the existing automobile differential front shell forgings figure 1 Shown: blank - upsetting - pre-forging (with flash) - final forging (with flash) - trimming. [0003] The defective that existing forming technology exists is: [0004] 1. The positioning from upsetting to pre-forging is inaccurate, and the material is easily deflected during forming. There will be more material on one side (more material is discharged into the flash), and less material on one side, resulting in less material on the side Forgings have filling and dissatisfaction defects; [0005] 2. The cavity of the upper mold is shallow, it is difficult to check the error of forgings, forgings are ...

AI Technical Summary

Problems solved by technology

[0004] 1. The positioning from upsetting to pre-forging is inaccurate, and the material is easily deflected during forming. There will be more material on one side (more material is discharged into the flash), and less material on one side, resulting in less material on the side Forgings have filling and dissatisfaction defects;

[0005] 2. The cavity of the upper mold is shallow, it is difficult to check the error of forgings, forgings are prone to error defects, and defective products are easy to be produced;

[0006] 3. This process adopts open forging (with flash), the rod is completely formed by extrusion, and the lower end of the forged rod is full of difficulties, so the small steps of the rod cannot be accurately formed;

[0007] 4. Low production efficiency: heavy parts, slow manual operation; edge trimming is required, low production efficiency

Images