Front-mounted workpiece chuck

Abstract

The invention discloses a front-mounted workpiece chuck, and relates to the technical field of workpiece chucks. The front-mounted workpiece chuck comprises a main shaft, a chuck seat, a chuck handle, a piston, an air pipe, a collet, a rotary connector, a spring, a pull rod and a cap, the chuck handle and the main shaft are matched and fixed at high precision through a taper hole and rotate together, the chuck seat is fixed on the chuck handle, an inner hole and an inner cavity are formed in the chuck handle, the piston is slidably arranged on the inner cavity, the head of the air pipe is in threaded connection with the piston, the collet is arranged on the chuck seat, the rotary connector is connected with the tail of the air pipe, the head of the air pipe is sleeved with the spring, the end of the chuck handle is provided with threads and connected with the pull rod, the left end of the pull rod is provided with threads, the cap tensions the chuck handle in a matched mode through the threads, the piston is integrated in a chuck mechanism, so that a compact structure and large driving force are realized, the matching with a workpiece main shaft connector is greatly facilitated, supply of an air source or hydraulic pressure is achieved through a small rotating structure at the tail, and the eccentric problem caused by a conventional large rotating connector is avoided.

Description

technical field [0001] The invention relates to the technical field of workpiece chucks, in particular to a front-mounted workpiece chuck. Background technique [0002] In the process of turning or grinding, the workpiece is clamped by pneumatic or hydraulic means, which can realize automatic or manual clamping, the driving parts are front, and the air source or hydraulic pressure is input through the rotary joint at the rear of the spindle, so as to realize workpiece clamping , the current chuck adopts the latter type of rotary cylinder or oil cylinder, and also uses the front type of rotary cylinder. The former must be made with a relatively large diameter when it must be used in a hollow state. The main shaft vibrates and jumps. The latter front-end rotary cylinder also requires a relatively large volume, and under certain conditions of use, it will interfere with the protective cover of the tool or grinding wheel, especially when the grinding machine is used. This probl...

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Problems solved by technology

[0002] In the process of turning or grinding, the workpiece is clamped by pneumatic or hydraulic means, which can realize automatic or manual clamping, the driving parts are front, and the air source or hydraulic pressure is input through the rotary joint at the rear of the spindle, so as to realize workpiece clamping , the current chuck adopts the latter type of rotary cylinder or oil cylinder, and also uses the front type of rotary cylinder. The former must be made of a relatively large diameter when it must be used in a hollow state. When rotating at high speed, due to eccentric installation or manufacturing Vibration and runout of the spindle

The latter front-end rotary cylinder also requires a relatively large volume, and under certain conditions of use, it will interfere with the protective cover of the tool or grinding wheel, especially when the grinding machine is used, this problem is more prominent

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