Hydraulic clamping apparatus for machine tool

Abstract

The invention hydraulic pressure clamping device on the lathe belongs to a mechanic technique field which solves problems that the existing clamping device is of difficult operation, low efficiency and low processing accuracy. The hydraulic pressure clamping device is set at the case at the lathe head including main shaft, clamping head and pulling tube. The pulling tube is fixed together with the clamping head inserting into main shaft with the pulling tube at the end of the main shaft. The other end of the main shaft is installed with a hydraulic pressure cylinder with a piston inside fixed with the pulling tube. A core shaft pierce through the piston with two through holes set on the shaft axially of which the inner hole communicates respectively with the hydraulic cylinder cavities by both sides of the piston and its outer hole is linked with hydraulic channels. This clamping device is handily, high efficiency and great clamping force due to it achieves clamping in hydraulic principles, moreover can maintain considerable processing accuracy for the lathe so to lengthen its service life.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a lathe, in particular to a clamping device in the lathe. Background technique [0002] Lathes are generally used to process small and medium-sized workpieces, and their clamping devices are connected to the main shaft of the lathe. The clamping device can quickly clamp the workpiece, and the spindle drives the workpiece or the tool to rotate after clamping the workpiece. [0003] Most of the clamping devices of existing lathes are of pure mechanical structure. As provided by Chinese patent 012466573 "instrument lathe clamping device", it is made up of parts such as main shaft, pull pipe, collet, adjusting disc, three-jaw seat and shift fork ring. Same as the ordinary instrument lathe, the clamping device also moves the clutch taper sleeve by turning the fork ring, and pushes the adjustment disc to move, so that the chuck is tightened to clamp the workpiece. Since the clamping ...

AI Technical Summary

Problems solved by technology

[0004] 1. Every time the workpiece is clamped, the shift fork must be moved, which is laborious and inefficient.

[0005] 2. Since the entire mechanical device is exposed, especially the long extension of the shift fork, it not only makes the appearance of the lathe unsightly, but also takes up space, causing unsafe hidden dangers

[0006] 3. The fine metal powder produced by the existing clamping device during the processing of the workpiece will enter the parts such as the chuck and the drawing tube, which directly affects the processing accuracy and service life of the lathe

[0007] 4. In the existing clamping device, the pull tube and the clutch claw are slightly eccentric, which generates centrifugal force and cannot rotate at high speed

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