A flexible drive fixture for rotating workpieces

Abstract

The invention relates to a rotary workpiece flexible driving fixture which comprises a rotary chassis ad a flexible chuck, wherein the rotary chassis is mounted on a machine tool spindle and coaxiallyand freely rotates relative to the machine tool spindle; the flexible chuck is mounted on the rotary chassis through a flexible connecting rod; and a flexible connecting spring is arranged on the flexible connecting rod in a sleeving manner. The rotary workpiece flexible driving fixture has the following benefits: flexible clamping and fixing of a rotary workpiece are realized through adopting the flexible connecting rod, a flexible connecting hole and a flexible connecting spring, so that stress and elastic deformation generated during the clamping process of a cylindrical workpiece can be avoided, the machining precision and quality can be ensured, the defects that the roundness error, the taper error and the cylindricality error are excessively large, a shaking line and a feeding lineare generated on the machining surface during the finish machining process of the cylindrical workpiece are eliminated, and the structural precision and the degree of finish of the workpiece can be remarkably improved.

Description

technical field [0001] The invention belongs to a mechanical rotation transmission mechanism, in particular to a flexible drive fixture for a rotating workpiece. Background technique [0002] In the processing of cylindrical workpieces, the commonly used processing method is to use a fixture (usually a chuck) to clamp one end of the workpiece, and the other end of the workpiece is supported by the tip, but the axis of the clamping force of the fixture and the center of the tip The line cannot guarantee an accurate coaxial state, which will cause a certain radial stress on the workpiece between the fixture and the tip, which will affect the processing quality during high-precision processing, and the roundness error will be too large after the workpiece is finished. After the workpiece is machined, the taper is too large, the cylinder is too large, and the vibration pattern on the machined surface is obviously affected by the smoothness of the problem. The improvement method...

AI Technical Summary

Problems solved by technology

In this way of clamping the workpiece, the chuck will also generate additional forces on the workpiece while clamping the workpiece, including radial and axial forces, which will cause internal stress or elastic deformation of the workpiece. After completion, deformation occurs under the action of internal stress or elastic recovery, which affects the processing quality of the workpiece, especially in the process of diameter machining.

Images