A processing method and mold for a shaft sleeve used in an automobile steering transmission mechanism

Abstract

The invention discloses a processing method for a shaft sleeve used for an automobile steering transmission mechanism. In the method, an E35+N seamless steel tube is used as a parent material, a flanging die composed of a male die and a female die is used, and the shaft sleeve is manufactured by flanging each end of the seamless steel tube for three times, wherein a first flanging angle is 30-45 degrees, a second flanging angle is 45-70 degrees and the third flanging angle is 70-93 degrees; while flanging the first end, a descending speed of the male die is controlled to be 50-100 mm / min; while flanging the second end, the descending speed of the male die is controlled to be 150-200 mm / min; in each flanging process, lubricating oil is injected between the parent material and the female die through a lubricating oil hole on the male die, and simultaneously, compressed air is injected between the parent material and the female die through a cooling air hole on the male die so as to cool the parent material; one end is flanged firstly, and the other end is flanged later. The method has the following technical benefits that: at a part with an inner angle of 90 degrees, the phenomenon of thickening cannot be caused; 2, at an excircle part of the flange, the phenomenon of thickness reduction cannot be caused, and hair cracks and wrinkle the material can be effectively avoided. The method further discloses a die using the method.

Description

technical field [0001] The invention relates to a processing method and a mold for a shaft sleeve of an automobile steering transmission mechanism. Background technique [0002] The function of the steering transmission mechanism is to transmit the force and motion output by the steering gear to the steering knuckles on both sides of the steering bridge, so that the steering wheels on both sides are deflected, and the deflection angle of the two steering wheels is changed according to a certain relationship, so as to ensure that the wheels are in line with the steering wheel when the car is turning. The relative sliding of the bottom surface is as small as possible. [0003] In order to ensure driving safety, the parts that make up the steering system should have sufficient strength. The shaft sleeve is one of the key parts. In the current processing method of the shaft sleeve, there are fine cracks in the outer circle of the flanging, and there is a phenomenon of thinning...

AI Technical Summary

Problems solved by technology

In the current processing method of the shaft sleeve, there are fine cracks in the outer circle of the flange, and there is a phenomenon of thinning or thickening the wall thickness. It is difficult to control the roundness of the outer circle and the flatness of the end face.

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