Fixture for machining outer circle of commutator

Abstract

The invention discloses a fixture for machining an outer circle of a commutator. The fixture for machining the outer circle of the commutator is characterized by comprising an air cylinder (1), a pull rod (2), a positioning mandrel and a positioning block (4), wherein the pull rod (2) is connected with the air cylinder, the pull rod is arranged in the positioning mandrel, the tail portion of the pull rod (2) is arranged to be of an I-shaped groove structure, and the positioning block (4) is placed in a groove. According to the fixture for machining the outer circle of the commutator, the head portion of the positioning mandrel (3) is arranged in an inner hole of the commutator in a sleeved mode, the positioning block (4) is placed in the I-shaped groove of the pull rod (2), the pull rod (2) tensions the positioning block (4) under the action of tension of the air cylinder (1), and thus positioning of the commutator is carried out. By the adoption of the mode, turning can be directly carried out on the outer circle and the end face of the commutator, and the purpose of one-time forming is achieved. Meanwhile, repeated positioning errors of repeated machining of commutator products are reduced, and machining efficiency of the products can be effectively improved.

Description

technical field [0001] The patent of the present invention relates to an improved invention of a jig for processing the outer circle of a commutator. Background technique [0002] In the existing technology, there are the following three common positioning methods for machining the outer circle of the commutator. The first one is to turn the outer circle of the commutator on the instrument lathe through a thimble first, and then turn the end face or inner circle of the commutator whose outer circle has been turned through another instrument lathe after turning. This technical method has cumbersome procedures and many repeated product positioning times, which increases the positioning error of the product during processing, and the product processing efficiency is low. In the second case, the tail of the mandrel is positioned with a threaded connection nut. Although this method has high production efficiency, the number of times the employee operates the nut with a wrench is...

AI Technical Summary

Problems solved by technology

This kind of technical method has cumbersome procedures and many repeated product positioning times, which increases the positioning error of the product during processing, and the product processing efficiency is low.

In the second case, the threaded connection nut is used for positioning at the tail of the mandrel. Although this method has high production efficiency, the number of times employees use a wrench to operate the nut is high, and the labor intensity is relatively high.

In the third case, the core shaft of the internal expansion structure is used for positioning, and the processing efficiency is very high. However, due to the use of internal expansion for positioning the inner hole, it is easy to crack and strain the inner hole, which increases the probability of product waste.

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