Method for processing gear ring blank for automobile synchronizer

Abstract

The processing method for a round bar blank into a synchronizer geared ring blank for vehicles are like this: feeding, heating, descaling, metal gathering, punching, discharging end face, extending molding and trimming to make the round bar into a geared ring blank with 50-78 mm diameter, 10-15 wall thickness, 45-60 mm in height. By applying rolling ring processing technique in the process, it greatly reduces the manufacturing cost, improves precision, bettering the heat treatment performance of finished parts, reducing subsequent processing quantity, with improved productivity and lengthened durability of the finished geared ring. After several times road test, compared with traditional manufacturing method, this synchronizer can lengthen durability by 30%, reduce cost 15%, and improve productivity 10%.

Description

technical field [0001] The invention belongs to the technical field of automobile synchronizers, and in particular relates to a processing method for a ring gear blank of an automobile synchronizer. Background technique [0002] The automobile synchronizer ring gear is one of the important parts in the automobile transmission mechanism. Its processing quality, structure and service life directly affect the normal driving of the automobile and the personal safety of the drivers and passengers. my country's automobile industry started late, and its blank forging processing technology is relatively backward. For hollow thin-walled ring gear blanks such as synchronizer rings, it is difficult to meet the blank size requirements by using traditional forging methods. In actual production, only Steel pipes can be used as raw materials. [0003] The traditional hole reaming and rolling technology of ring parts uses bar as the blank. The mold manufacturing is complex, the service life...

AI Technical Summary

Problems solved by technology

For the ring gear blank, the excessive difference in outer circle and wall thickness will directly affect the machining quality, especially when turning the outer circle and inner hole, it is easy to cause machining defects such as tool damage and excessive surface finish of the part, which directly affects The performance of finished parts also affects the accuracy and service life of the machine tool itself

[0007] (3). Using traditional steel pipes as raw materials must be cut with a sawing machine or a cutting machine.

Now, if the total length of each tube is 6m, if the length of the blank is 52mm, 115 pieces can be loaded, and if the length of the blank is 55mm, only 109 pieces can be loaded, and the waste of raw materials will reach 5.5%.

[0008] (4). Due to the relatively loose internal fiber structure of steel pipe raw materials, the parts processed as blanks have large deformation after heat treatment, poor comprehensive mechanical properties, and short service life of parts.

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