Manufacturing technology of internal and external splines of gear hubs of automatic gearbox clutch

Abstract

The invention discloses a manufacturing technology of internal and external splines of gear hubs of an automatic gearbox clutch. The technology comprises the following steps that firstly, a metal plate is levelled through a levelling machine, and the situation that the plane difference needs to be smaller than 0.2mm is ensured; secondly, the metal plate is punched to form a round metal plate blank; thirdly, the round metal plate blank is drawn in an extension mold to be in a cup shape; fourthly, the cup-shaped blank is rolled through an inner gear hub mold and an outer gear hub mold so that the inner gear hub and the outer gear hub can be preformed; fifthly, the inner gear hub and the outer gear hub are reshaped and formed; sixthly, the side length of each gear hub is subjected to side punching; seventhly, first oil passing holes are subjected to side punching; eighthly, second oil passing holes are subjected to side punching; ninthly, first fastening ring clamping grooves are subjected to side punching; and tenthly, second fastening ring clamping grooves are subjected to side punching. According to the manufacturing technology, the manufacturing procedure of the internal and external splines of the gear hubs of the clutch is shortened, the manufacturing speed of the internal and external splines of the gear hubs of the clutch is increased, the investment of machine platform operation workers is reduced, and the production cost of an enterprise is reduced.

Description

technical field [0001] The invention relates to the field of processing internal and external splines, in particular to a preparation process for internal and external splines of an automatic transmission clutch gear hub. Background technique [0002] After several years of continuous high-speed blowout development, the domestic automobile industry has entered a relatively stable period. The current production and sales scale exceeds 20 million vehicles per year. The huge automobile market also has a huge demand for gearbox clutches. The gearbox clutch is composed of a clutch hub, a friction plate, a steel plate, etc., and the connection and disconnection of the torque are realized through the compression and release of the friction plate. The clutch hub is one of the core parts of the clutch, and the clutch hub and the friction plate usually mesh with each other through the tooth shape. The clutch hub usually has internal longitudinal teeth, external longitudinal teeth or...

AI Technical Summary

Problems solved by technology

[0003] Cutting is done by gear hobbing, broaching, etc., the processing efficiency and material utilization rate are low, the material fiber streamline is cut off, the fatigue impact resistance is weak, and the processing of non-penetrating teeth cannot be realized

Forging extrusion molding requires high equipment tonnage, and usually needs to heat the billet, resulting in high energy consumption

In addition, the forging extrusion molding die bears high extrusion strength and short service life

[0004] In the past, our company used the forging machining method to process the forging blank into a cup shape, and then hobbed the outer teeth by the gear hobbing machine, and processed the inner teeth by the gear shaper or planer. Not only the production is slow, but also the mass production The required process is long, the processing equipment and machine operators are numerous, the floor area is large and the one-time investment is large

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