Centering tool clamp for numerically-controlled machine tool

Abstract

The invention discloses a centering tool clamp for a numerically-controlled machine tool, and relates to the technical field of numerically-controlled machine tools. The device comprises an outer cylinder, wherein a limiting end ring is arranged on the inner side of the opening end of the outer cylinder; the inner wall of the outer cylinder is rotationally connected with threaded sleeves; the inner walls of the end parts of the threaded sleeves are in threaded connection with clamping frames; the outer walls of the end parts of the threaded sleeves are sleeved with gear rings; fixing seats arearranged on the inner wall of the outer cylinder in an annular array manner; the tops of the fixing seats are rotationally connected with transmission frames in meshing transmission with the threadedsleeves; and the outer cylinder is rotationally connected with driving gear rings in meshing transmission with the transmission frames through second annular grooves. According to the centering toolclamp for the numerically-controlled machine tool, driving gears are in meshing transmission with the gear rings when rotating, limiting guide blocks on the inner sides of the gear rings cooperate with limiting guide grooves in the circumferential side faces of threaded end rods, and under the limiting effect of guide rods and guide sleeves, the distance of a single clamping frame can be adjusted,an eccentric workpiece can be centered, clamped and fixed, operation is easy, and construction is convenient; and the mounting clamping force is relatively strong, so that actual processing requirements are met.

Description

technical field [0001] The invention belongs to the technical field of numerical control machine tools, in particular to a centering fixture for numerical control machine tools. Background technique [0002] CNC machine tool is a high-precision and high-efficiency automatic machine tool, equipped with multi-station cutting tools, has a wide range of processing performance, and can process complex workpieces such as straight cylinders, oblique cylinders, arcs and box threads, grooves, worms, etc. It has various compensation functions such as linear interpolation and circular interpolation, and has played a good economic effect in the mass production of complex parts. [0003] At present, CNC machine tools generally use chucks to clamp parts such as shafts and pipes. When the disk is locked, when the small bevel gear is pulled with a wrench or a drive motor, the wire will rotate. The flat thread makes the jaws approach or withdraw from the center at the same time. Because of...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of centering fixture for numerical control machine tools, through the cooperative use of outer cylinder, threaded sleeve, clamping frame, gear ring, driving gear, transmission frame and driving ring gear, solves the problem of existing numerical control The centering clamping operation of the machine tool for the eccentric workpiece is complex and the clamping force is small

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