Taper-lock external expansion type centering drilling clamp

Abstract

The invention discloses a taper-lock external expansion type centering drilling clamp which comprises a drill plate with a through hole formed in the middle. A boss is arranged at the lower end of the drill plate. Multiple drill bushes are evenly arranged on the drill plate in the axial direction of the drill plate. A step screw is arranged in the through hole in the middle of the drill plate. The lower end of the step screw penetrates through a disc-shaped taper-lock and is provided with a lower nut and an upper nut is installed at the upper end of the step screw. Multiple expansion grooves are evenly formed in the upper side of the disc-shaped taper-lock in the circumferential direction. An inner hole of the disc-shaped taper-lock has the taper so as to be matched with the boss in a sliding mode. The taper-lock external expansion type centering drilling clamp has the following advantages of being large in expansion force, free of deviation in the machining process, capable of being automatically centered, high in machining accuracy, reasonable in design, simple in structure, convenient to operate, small in size, low in weight, convenient to disassemble, assemble and transport, low in production cost and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and relates to a fixture, in particular to an expansion sleeve and outwardly expanding centering drilling fixture. Background technique [0002] At present, with the development of society and the advancement of science and technology, the automobile industry has been greatly developed. More and more automobiles have entered thousands of households. The demand for automobile brake discs is getting older and stronger. The factory often receives a large number of An order for brake discs for cars. The hole position accuracy of the threaded bottom hole on the automobile brake disc is relatively high, and it is processed by using the traditional three-point centering drilling fixture. Because the three-point expansion force is not enough, there will be a small amount when drilling with this fixture. The offset, resulting in processing errors, can not guarantee the position accuracy of ...

AI Technical Summary

Problems solved by technology

The hole position accuracy of the threaded bottom hole on the automobile brake disc is relatively high, and it is processed by using the traditional three-point centering drilling fixture. Because the three-point expansion force is not enough, there will be a small amount when drilling with this fixture. offset, resulting in processing errors, the position accuracy of these holes cannot be guaranteed, resulting in the holes not meeting the requirements of the drawing

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