Four-claw automatic centering chuck and machine tool

Abstract

The invention relates to machine tool clamping, and provides a four-claw automatic centering chuck. The four-claw automatic centering chuck comprises a rotary base. The rotary base is provided with amounting hole. The four-claw automatic centering chuck further comprises two sets of two-claw clamping mechanisms. Each two-claw clamping mechanism comprises two sets of clamp claw assemblies and a screw. The screws of the two sets of two-claw clamping mechanisms cross with each other. Each clamp claw assembly comprises a rotary clamping claw and a drive part, and the rotary clamping claws are distributed on the mounting hole. The two rotary clamping claws of each two-claw clamping mechanism are arranged oppositely, and the moving paths of the two rotary clamping claws of each two-claw clamping mechanism are located on the same straight line. In each two-claw clamping mechanism, one rotary clamping claw is in right-hand thread connection with the screw, and the other rotary clamping claw is in left-hand thread connection with the screw. The invention further provides a machine tool which comprises the above chuck. The rotary clamping claws of the chuck are synchronously closed or opened under the action of the drive parts, clamping force is constant and can be adjusted according to the actual condition, and when clamped, a workpiece can move and penetrate from the middle of the rotary base; and the clamping range is wide, the speed is high, and the locating precision is high.

Description

technical field [0001] The invention relates to machine tool clamping, in particular to a four-jaw automatic centering chuck and a machine tool. Background technique [0002] The Zhongtong four-jaw automatic centering pneumatic chuck is the main component of the tube laser cutting machine tool. One end of the workpiece is clamped by the rear clamp on the main shaft of the machine tool, and the other end is clamped and positioned by the pneumatic chuck installed at the end of the machine tool. The workpiece rotates and moves in the pneumatic chuck as required, and then the laser is focused on the cutting head to cut the workpiece cutting. [0003] Current status: [0004] 1) The structure of the current Zhongtong pneumatic four-jaw chuck is too complicated, and it is easy to get stuck; the clamping range is small; the clamping force within the clamping range is inconsistent and easy to loosen; it cannot directly clamp a rectangular workpiece with a large ratio of rectangles...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a four-jaw automatic centering chuck, which aims to solve the problems of the existing four-jaw chucks such as small clamping range, insufficient clamping accuracy, complex structure, and no clamping force compensation function.

Images