Overall waveform piece machining technology for automobile clutch

Abstract

The invention relates to an overall waveform piece machining technology for an automobile clutch, and belongs to the technical field of clutch machining. The overall waveform piece machining technology comprises the steps that a 65 Mn steel belt in the spheroidizing annealing state is prepared, and procedures including punching, necking, center hole punching and blanking are carried out; overall waveform piece quenching is carried out, wherein feeding washing, quenching and post washing are carried out; and tempering leveling, tempering molding and anti-rusting treatment are carried out. The overall waveform piece machining technology has the beneficial effects that eight waveforms are formed on a circumference of an overall waveform piece, and the mold height can meet the requirement forcoincidence. Compared with an overall waveform piece machined through original technology by means of axial compression endurance tests, the fatigue decrement is reduced.

Description

technical field [0001] The invention belongs to the technical field of clutch processing. Background technique [0002] One of the functions of the clutch is to ensure the smooth start of the car. During the coupling process of the clutch, the wave plate plays the role of axial vibration reduction, and the wave plate is divided into two types in structure, integral type and split type. The corrugated sheet is mainly subjected to alternating loads, impact loads, and shear stresses, so it is easy to produce fatigue attenuation and cause the car to start shaking. The material used for the corrugated sheet is 65Mn, which requires high elastic limit, yield strength and fatigue strength. [0003] At present, the processing technology of the overall corrugated sheet is punching - punching groove - punching center hole - blanking forming - heat treatment tempering - rust prevention, the raw material is heat treatment steel strip, width 226mm, thickness 0.8mm, hardness 440-485 HV 3...

AI Technical Summary

Problems solved by technology

The problem in the process described above is that the quenched spring steel strip has a certain hardness, and a certain amount of springback will be generated during the forming process of the blanking forming process. There is a correlation between the amount of springback and the thickness and width of the steel strip used, and the overall In the entire circumferential direction of the corrugated sheet, the direction of the steel strip fiber is inconsistent. In order to ensure the consistency between the waveforms of the entire corrugated sheet, it is usually necessary to repeatedly adjust the size of the surface drop of the mold in the forming process, and the workload is large.

The overall corrugated sheet after stamping has molding stress. The tempering at 350°C mentioned in the above process belongs to medium temperature tempering. In order not to change the comprehensive performance of raw materials, the tempering temperature cannot be increased for stress relief tempering. As a result, the axial deformation of the wave plate will have a certain degree of attenuation during use. If the axial deformation of the wave plate is too attenuated, the car will shake when it starts

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