Integrated type chuck

Abstract

The invention discloses an integrated type chuck. According to the main content, the integrated type chuck comprises a rotary shaft, an SMA sleeve, a clamping jaw and a mounting shaft; an axial conical hole is machined in the center of the right end of the rotary shaft; the big end of the conical hole in the rotary shaft is on the right side; an outer cone is arranged at the left end of the mounting shaft; the mounting shaft is installed in the conical hole of the rotary shaft; the clamping jaw at the left end is locked; the clamping jaw and the rotary shaft are integrated; three or four cutting grooves are evenly distributed in the right end of the clamping jaw; the cutting grooves divide the clamping jaw into three or four sections; a cutting groove is machined in an inner hole at the right end of the SMA sleeve; the SMA sleeve is installed on the surface of the outer circle of the clamping jaw in an interference mode; and the left end of the SMA sleeve abuts against the step of therotary shaft.

Description

technical field [0001] The invention relates to the technical field of spindles, in particular to an integrated collet. Background technique [0002] With the rapid development and application of micro-machine tools for micro-cutting technology, the speed of the micro-spindle and the rotation accuracy of the tool have been continuously improved, and correspondingly high requirements have been put forward for the dynamic balance performance and dynamic characteristics of the tool clamping mechanism. Requirements, especially at ultra-high speeds, the tool clamping mechanism requires high dynamic balance and good centering, so as to ensure high-speed, ultra-precision machining, otherwise the higher the speed, the greater the centrifugal force, when it reaches the system In the critical state, the tool will be excited, and the result will be a decrease in processing quality, shortened tool life, accelerated spindle bearing wear, and damage to the tool and spindle in severe cases...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development and application of micro-machine tools for micro-cutting technology, the speed of the micro-spindle and the rotation accuracy of the tool have been continuously improved, and correspondingly high requirements have been put forward for the dynamic balance performance and dynamic characteristics of the tool clamping mechanism. Requirements, especially at ultra-high speeds, the tool clamping mechanism requires high dynamic balance and good centering, so as to ensure high-speed, ultra-precision machining, otherwise the higher the speed, the greater the centrifugal force, when it reaches the system In a critical state, the tool will vibrate, resulting in a decrease in processing quality, shortened tool life, accelerated wear of the spindle bearing, and damage to the tool and the spindle in severe cases

The spring collet is widely used in the micro-spindle, but its structure is still relatively complicated. The smaller the size, the worse the dynamic balance, and its manufacturing and installation errors will be transmitted to the tool, which will aggravate the beating of the tool.

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