Four-jaw chuck clamp used for high-precision four-jaw chuck

Abstract

The invention relates to the technical field of machine tool clamps, and discloses a four-jaw chuck clamp used for a high-precision four-jaw chuck. A displacement detecting mechanism used for detecting moving displacement of various clamping jaws is arranged in a four-jaw chuck. A control and compensation mechanism is arranged and can carry out fine adjustment and compensation on the moving condition of the clamping jaws, and therefore after the displacement detecting mechanism detects that the displacement difference value of displacement of certain or multiple clamping jaws and the other clamping jaws reaches a set threshold value, the control and compensation mechanism can carry out fine adjustment and slowing down in the moving situation of the clamping jaws large in displacement so asto keep synchronous centering and clamping with the other clamping jaws. Thus, even screws are worn to different degrees, synchronous drive can be achieved precisely, the centering function of synchronous clamping is guaranteed, operation can be achieved simply by controlling action of nuts and T-shaped sliding blocks, and operation is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of machine tool fixtures, in particular to a four-jaw chuck fixture for high-precision numerically controlled machine tools. Background technique [0002] At present, for the processing of parts such as shafts and pipes, chucks are generally used to achieve positioning. Chucks are generally capable of centering clamping. Because the four-jaw chuck generally consists of a disc body, four small bevel teeth, and a pair of claws. The four small bevel teeth mesh with the coil wire. The back of the coil wire has a flat thread structure, and the claws are installed on the plane thread in equal parts. Therefore, when the four-jaw chuck is locked, use a wrench or a drive motor to move the small bevel gear. When the wire is rotated, the flat thread on the back of it makes the claws approach or withdraw from the center at the same time. Because the pitches of the flat rectangular threads on the coil wire are equal, ...

AI Technical Summary

Problems solved by technology

However, since the chuck needs to be clamped, the screws or coil wires are subjected to greater stress and wear during clamping. Therefore, with long-term use, the wear of the screws on each jaw is different. After the screw is worn out, the positioning accuracy will be significantly affected, and it is difficult to achieve accurate centering

Images