An improved sleeve expansion device

Abstract

The invention discloses an improved swelling sleeve device which is used for machining of a motor case. The improved swelling sleeve device comprises a shaft sleeve; the rear end of the shaft sleeve can be fixed to a machine tool; a shaft hole is formed in the center of the shaft sleeve, and is internally provided with a telescopic shaft capable of moving axially along the shaft hole; the telescopic shaft comprises a connecting part at the rear end and an extrusion part at the front end; a reduced section is arranged on the rear side of the extrusion part; a plurality of swelling blocks are arranged on the peripheral surface of the front end of the shaft sleeve; the extrusion part abuts against the swelling blocks through propping columns that are arranged on the swelling blocks and penetrate into the shaft hole; and an elastic resetting mechanism is arranged between the shaft sleeve and each swelling block. The problems that a swelling sleeve in the prior art is complex in structure, high in operation difficulty, high in cost and small in expansion quantity are solved effectively; the production efficiency can be improved effectively; the production cost can be reduced; and the improved swelling sleeve device has very high practical value.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to an improved sleeve expanding device used for processing motor casings. Background technique [0002] In a factory that produces motor casings, a large part of the processing is to cut steel pipes (workpieces) for processing casings, and cutting pipes requires turning the outer diameter or turning the end face. In the existing processing process, the material is directly blanked. The pipe needs to go through multiple processes such as pipe cutting→inner angle chamfering→finishing both ends of the car. Since the expansion and contraction of the existing expansion sets is very small (usually only 0.3 to 0.4 mm), the pipe after blanking It is necessary to go through the inner corner chamfering process before inserting the expansion sleeve mold for the end face operation, which is time-consuming and labor-intensive. However, most expansion sleeve devices with large expan...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of complex structure, difficult operation, high cost and small amount of expansion in the prior art, and provide an improved expansion device, which has the advantages of simple structure, convenient operation and large amount of expansion. It can meet the requirements of mass and rapid production of motor casings, effectively improve production efficiency and greatly reduce production costs

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