Motor case one-step turning method and clamp

Abstract

The invention relates to the technical field of metal machining, in particular to a motor case one-step turning method and a clamp. The problem that finish machining of an inner hole and two end faces of an existing motor case needs to be completed by two steps, and is low in precision is solved. The motor case one-tool turning method comprises the steps that a, an inner hole, the end face and an inner spigot joint on the end face of a motor case are roughly machined in a two-face rough-boring machine tool; b, one end A is selected, then, an outer spigot joint is machined in circumferentially-arranged lugs for motor end cover installation at the end A, and the end A is machined to enable the annular plane at the position, attached to the motor end cover end face, on the end face to form an annular boss; c, the motor case end A is fixedly installed on the clamp of a numerically-controlled machine tool, wherein the clamp is annular, and the inner ring of the clamp is provided with an inner spigot joint in tight fit with the outer inner spigot joint at the motor case lugs; d, the numerically-controlled machine tool is used for finish machining of the inner hole and the two end faces of the motor case, and only the annular boss of the end face A is cut to reach the needed motor case axial size except that the inner spigot joint of the end face A is machined.

Description

technical field [0001] The invention relates to the field of motor manufacturing, in particular to a motor casing-tool lathe processing method and a fixture thereof. Background technique [0002] At present, the finishing machining of the motor casing in my country's motor industry still uses the traditional U-turn turning process. It takes four steps to complete from rough turning to finishing turning; the general processing process first processes the end face and stop of the casing on an ordinary vertical lathe. The mouth and the inner hole; and then turn around to process the plane and seam of the other end of the casing. The machining process requires four clampings: two times of rough turning and two times of fine turning. Practice has proved that after a clamping process, the casing is a thin-walled part, and the spigot and the inner hole are deformed under the action of thermal internal stress. There is still a certain positioning error in U-turn turning using seam p...

AI Technical Summary

Problems solved by technology

Therefore, the requirements for the size and tolerance of the inside of the casing are very high, which adds a certain degree of difficulty to the processing.

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