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 machine base and two two-claw clamping mechanisms, wherein each two-claw clamping mechanism comprises two clamping claws, two transmission assemblies and a driving part; each transmission assembly comprises a driving rod, a driving connecting rod, a clamping connecting rod and a clamping rod which are hinged sequentially to form a parallelogram; and a hinged point between the driving connecting rod and the clamping connecting rod is hinged on the machine base and is positioned on or near a connecting straight line between a first elongating end and a second elongating end. The invention also provides a machine tool comprising the chuck. The four clamping claws can be shrunk towards the middle part under the action of the driving part to realize workpice clamping, and the speed and the precision are high; furthermore, a parallel four-rod mechanism formed by the driving rod, the driving connecting rod, the clamping rod and the clamping connecting rod performs transmission between the clamping claws and the driving part, the four clamping claws can be shrunk towards the circle center in pairs to realize workpiece clamping, and the clamping speed, the clamping precision and the clamping force are high.

Description

technical field [0001] The invention relates to a machine tool, in particular to a four-jaw automatic centering chuck and a machine tool. Background technique [0002] Machine tool chucks are the most commonly used accessories for machine tools. Different parts to be processed must correspond to different sizes and different types of chucks. Especially for laser cutting machine tools, most of the parts to be processed are rectangular. The current situation is that when processing rectangular parts, Only four-jaw chucks can be used to clamp workpieces, and the four-jaw chucks currently used: 1) Traditional four-jaw chucks cannot automatically center and clamp workpieces, and usually must be adjusted repeatedly and continuously through measurement or experience. The respective positions are used to achieve the purpose of centering and clamping, so the auxiliary time is too long, which seriously affects the production efficiency; 2) In the past two years, a chuck with four claw...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a four-jaw automatic centering chuck, which aims to solve the problems of troublesome centering of existing chucks or too short clamping stroke or unreliable clamping force

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