Expanding type thin-walled workpiece clamping device used for lathe machining

Abstract

The invention discloses an expanding type thin-walled workpiece clamping device used for lathe machining. The device comprises a clamping head, a plurality of expanding sleeves, a threaded rod, an elastic expanding sleeve, and a gland nut. One side of the clamping head is fixedly connected with the front end of the threaded rod. The threaded rod is sleeved with the plurality of expanding sleeves. The tail end of the threaded rod is provided with a pressing plate and the gland nut in sequence, and the pressing plate and the gland nut are cooperated with each other and used to apply axial pretightening force on the expanding sleeve. The outer sides of the plurality of expanding sleeves are provided with an elastic rubber sleeve. The outer side of the elastic rubber sleeve is provided with the elastic expanding sleeve. The outer peripheral surface of the elastic expanding sleeve is provided with a plurality of rubber strips used to increase friction force between the elastic expanding sleeve and a to-be-processed thin-walled workpiece. The device is characterized by rational design, simple structure, high workpiece processing precision, convenient dismounting for workers, low worker labor intensity, high production efficiency, long service life of the clamp, low production cost, and easy popularization and use.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and relates to a clamping device, in particular to an outward expansion type clamping fixture for turning thin-walled circular tube workpieces. Background technique [0002] Due to the characteristics of thin wall, poor rigidity and weak strength, thin-walled circular tubes are prone to stress deformation, thermal deformation and vibration deformation during processing. When the thin-walled round tube is turned, it needs to be clamped by the three-jaw chuck on the lathe spindle. However, due to the thin wall, poor rigidity and weak strength of the thin-walled round tube, it is easy to deform under the clamping force of the three-jaw chuck. , which affects the accuracy requirements of its dimensional accuracy and shape tolerance. At the same time, because the thin-walled round tube is thin, the cutting heat generated during the turning process will cause thermal deformation of the th...

AI Technical Summary

Problems solved by technology

[0002] Due to the characteristics of thin wall, poor rigidity and weak strength, thin-walled circular tubes are prone to stress deformation, thermal deformation and vibration deformation during processing.

When the thin-walled round tube is turned, it needs to be clamped by the three-jaw chuck on the lathe spindle. However, due to the thin wall, poor rigidity and weak strength of the thin-walled round tube, it is easy to deform under the clamping force of the three-jaw chuck. , which affects the accuracy requirements of its dimensional accuracy and shape tolerance. At the same time, because the thin-walled round tube is thin, the cutting heat generated during the turning process will cause thermal deformation of the thin-walled round tube, making it more difficult to guarantee and control the size of the thin-walled round tube.

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