Cylinder liner spinning and flanging processing method and special fixture thereof

Abstract

The invention discloses a cylinder case rotary pressing-curling processing method and its special clamp, and the method: installing and griping the cylinder case in the clamp and rotating the clamp, adopting a rotary pressing wheel to expand and press the mouth of the cylinder case to form a 120-150 degree bellmouthing, adopting an extrusion wheel to planish the big platform, loosening the cylinder case griped by the clamp and then ejecting the cylinder case and completing the processing, where the special clamp is a clamp: there is a space between the inner and outer bodies, the diameter of one side of the outer body is greater than that of the other side, there is a push-remove case between the inner and outer bodies on one end of the clamp and there is a conical stopper on the other end of the clamp, there is a pull rod set in the center of the inner body, and the pull rod is connected with the conical stopper. It has the characters of simple processing procedures, accurate assembly and positioning, high processing precision, high working efficiency and low labor strength.

Description

1. Technical field [0001] The invention belongs to the technical field of engine cylinder sleeve processing, and in particular relates to a cylinder sleeve spinning flanging processing method and a special fixture thereof. 2. Background technology [0002] At present, the flanging process of the cylinder liner has been completed by the press, the stamping flanging die, and the punch. The stamping flanging is formed by two stampings. It adopts the form of opening and closing molds, which needs to be opened manually. There is a gap between the petals, the pressure is high during stamping, and the mold is easily damaged. Two processes, two stations, and two presses are operated separately, and it needs to be clamped twice to form, and the labor intensity is high. The alignment of the datum is not rigorous, that is, the degree of alignment between the die hole and the center of the punch is poor, the positioning accuracy of the station is poor, the processing is difficult, and t...

AI Technical Summary

Problems solved by technology

[0002] At present, the flanging process of the cylinder liner has been completed by the press, the stamping flanging die, and the punch. The stamping flanging is formed by two stampings. It adopts the form of opening and closing molds, which needs to be opened manually. There is a gap between the petals, the pressure is high during stamping, and the mold is easily damaged. Two processes, two stations, and two presses are operated separately, and it needs to be clamped twice to form, and the labor intensity is high. The alignment of the datum is not rigorous, that is, the degree of alignment between the die hole and the center of the punch is poor, the positioning accuracy of the station is poor, the processing is difficult, and the processing accuracy is not easy to guarantee. The workpiece does not rotate when the flange is formed, and it is easy to cause large The intersection arc between the end surface of the platform and the inner hole of the cylinder liner is relatively large, and there is a phenomenon of deflection. Post-processing quality

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