Flexible four-jaw chuck

Abstract

The invention discloses a flexible four-jaw chuck, and particularly relates to a flexible four-jaw chuck used for clamping irregular workpieces. On the basis of an original self-centering four-jaw chuck, four medium blocks embedded with upper single-acting jaws are added, are connected with lower linkage jaws in a hinged manner, can rotate freely and are independent modules, and a T-shaped worm gear is arranged on each medium block and matched with the same in a sliding pair mode. Each medium block turns to be locked at a constant angle in a mode that a worm drives the T-shaped worm gear, and meanwhile, the upper single-acting jaw embedded on the upper face of each medium block can move frontwards and backwards through rotation of a lead screw and is locked automatically by the aid of a self-locking function of the lead screw. The flexible four-jaw chuck can clamp regular or irregular workpieces by the aid of the rotatable medium blocks, a use range of the chuck is enlarged, and clamping safety, stability and processing accuracy of the workpieces are improved.

Description

[0001] technical field [0002] The invention relates to a machined workpiece chuck, in particular to a flexible four-jaw chuck capable of clamping irregular workpieces or rotating bodies. Background technique [0003] General-purpose fixtures mainly include vices, three-jaw chucks, four-jaw chucks, etc., which are mainly used for clamping and fixing workpieces (or blanks) with regular shapes, but for some workpieces with irregular or complex shapes (or blank), it is obviously impossible to achieve reasonable clamping with the above three fixtures. However, unreasonable clamping often reduces the machining accuracy, damages the workpiece (or blank), and eventually causes a large error in the size of the workpiece. Sometimes even the processing process is full of danger due to insufficient clamping force. Not only that, general fixtures often need to be disassembled repeatedly to clamp regular workpieces (or blanks) of different shapes, and the process is cumbersome. Cont...

AI Technical Summary

Problems solved by technology

[0003] General-purpose fixtures mainly include vices, three-jaw chucks, four-jaw chucks, etc., which are mainly used for clamping and fixing workpieces (or blanks) with regular shapes, but for some workpieces with irregular or complex shapes (or blank), it is obviously impossible to achieve reasonable clamping with the above three fixtures

However, unreasonable clamping often reduces the machining accuracy, damages the workpiece (or blank), and eventually causes a large error in the workpiece size

Sometimes even the processing process is full of danger due to insufficient clamping force

Not only that, general fixtures often need to be disassembled repeatedly to clamp regular workpieces (or blanks) of different shapes, and the process is cumbersome

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