Precise five-hole positioning and drilling clamp for rectangular cylinder workpiece

Abstract

The invention discloses a precise five-hole positioning and drilling clamp for a rectangular cylinder workpiece and belongs to the technical field of machining. By the adoption of the precise five-hole positioning and drilling clamp for the rectangular cylinder workpiece, the problems that when an existing technique is used for drilling five threaded bottom holes in each of two opposite side walls of the rectangular cylinder workpiece, the probability that the location degrees of the five threaded bottom holes in each side wall are out of tolerance is large, the rejection rate is large, the production cost is high, and the working efficiency is low are solved. A clamp body is a rectangular plate. A through groove is machined in the middle of the lower surface of the clamp body in the length direction of the clamp body. One end face of the clamp body is fixedly connected with a baffle through two connecting bolts. Five shoulder holes of the clamp body communicate with the through groove. One shoulder hole is located in the position of the geometrical center of the clamp body, and the other four shoulder holes are arranged in a rectangle mode. The geometrical center lines of the four shoulder holes arranged in the rectangle mode coincide with the geometrical center line of the clamp body. A drill sleeve is assembled in each shoulder hole, wherein the drill sleeve is in interference fit with the shoulder hole. Two threaded holes of the clamp body communicate with the through groove and are connected with butterfly bolts in a threaded mode. The precise five-hole positioning and drilling clamp is used for precise positioning and clamping when the five holes in each side wall of the rectangular cylinder workpiece are drilled.

Description

technical field [0001] The invention relates to a drilling jig for a rectangular cylindrical workpiece, which belongs to the technical field of mechanical processing. Background technique [0002] A rectangular tube workpiece on a certain product needs to process five threaded holes on two opposite side walls of the rectangular tube workpiece, and the positional tolerance of the five threaded holes on each side wall is required to be controlled at 0.70 mm, so the process of drilling threaded bottom holes becomes a key process. The existing processing procedure is that the first step is fitter marking, the second step is fitter punching, and the third step is fitter drilling. The fitter’s scribing will produce a slight error, the proofing punching error is slightly larger, and the size of the error is random when drilling, which will cause a high probability of out-of-tolerance positions for the five threaded bottom holes. The production rate is high, the reject rate is abo...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of using the prior art to drill five threaded bottom holes on two opposite side walls of the rectangular tube workpiece. The problems of high production rate, high production cost and low work efficiency, and then provide a five-hole precise positioning drilling jig for rectangular tube workpieces

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