Cold precision forging forming technology for inner spline lock ring with inverted cone

Abstract

The invention discloses a cold precision forging forming technology for an inner spline lock with an inverted cone. According to the body of the technology, precision forging forming of an end face ratchet and an inner spline is synchronously finished through a cold blocking forming procedure. The technology specifically comprises the following procedures of material preparing, ring rolling blankmanufacturing, annealing treatment, surface treatment, blank turning, phosphating, cold precision forging and finish machining. Few procedures are adopted, the work efficiency is high, and most importantly, machining of the end face ratchet and the inner spline is synchronously finished through one-time cold blocking forming work. Due to the fact that the position degrees of the ratchet and the inner spline in a lock ring are achieved through a die, precision is guaranteed, and consistency is good. In addition, the rolling and cold precision forging forming technology is adopted, on one hand,the original metal flow line is kept in the forming process, and on the other hand, the tissue density of the raw material is greatly improved; and accordingly, the abrasion resistance and strength ofproducts can be better improved, and the manufactured lock ring completely meets the requirement for automobile matching

Description

technical field [0001] The invention relates to a metal plastic forming process, in particular to a cold precision forging forming process, in particular to a cold precision forging forming process of an inner spline lock ring with an inverted taper. Background technique [0002] The lock ring is a very important transmission part in the automobile gearbox. This ring member has a ratchet on one end, and an inner spline with an inverted taper in the inner hole, and there is a gap between the end ratchet and the inner spline. Higher positional requirements. Since the positions of the two parts to be processed are 90° apart, and the forming methods are completely different, the conventional process separates the ratchet and the internal spline, that is, different processes are used to achieve processing. For example, the forging or milling process is used to make the ratchet on the end face, and the roll forming process is used to process the internal spline. The processing t...

AI Technical Summary

Problems solved by technology

However, there is a fatal shortcoming of powder metallurgy forming process, which is the poor structure density of the product, and the wear resistance of the lock ring is relatively poor, ...

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