A workpiece clamping device and machine tool

Abstract

The invention discloses a workpiece clamping device and a machine tool, comprising a box body, a workpiece shaft and a pneumatic brake. The pneumatic brake includes a brake cylinder, which is annular and connected to the workpiece shaft. Inner cavity, the inner cavity has the inner ring cavity wall for locking the workpiece, and the inner ring cavity wall has elastic deformation ability; the spring skin cavity is arranged in the inner cavity, the outer edge of the spring skin cavity is tightly connected with the brake cylinder body, and the spring skin The inner edge of the cavity is in contact with the inner ring cavity wall; among them, after the spring skin cavity is deflated, the spring skin cavity stretches in the radial direction, and exerts a force on the inner ring cavity wall, and the inner ring cavity wall hugs the workpiece; the spring skin cavity is inflated After that, the spring skin cavity expands in the axial direction, and the inner ring cavity wall rebounds and separates from the workpiece. This solution achieves the effect of clamping and loosening by shrinking and expanding in the radial dimension. With this clamping structure, positioning and clamping with high torque and high rigidity can be achieved; at the same time, due to the compact and ingenious structure, the size is smaller than that of the traditional hydraulic piston clamping mechanism.

Description

technical field [0001] The invention is used in the field of machine tools, especially the clamping of workpieces on the machine tools, and particularly relates to a workpiece clamping device and a machine tool. Background technique [0002] In recent years, the machine tool industry has developed rapidly, the competition has become more and more fierce, and the requirements for the processing capacity of machine tools have become higher and higher. Large tightening, high precision and strong stability. The traditional hydraulic structure requires more space, the hydraulic power system, the working environment is not clean, and the clamping twist is large. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a workpiece clamping device and a machine tool. [0004] The technical scheme adopted by the present invention to solve its technical problems is: [0005]...

AI Technical Summary

Problems solved by technology

The traditional hydraulic structure requires more space, the hydraulic power system, the working environment is not clean, and the clamping and twisting are large.

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