A jig for broaching two small holes of a lifting lug

Abstract

The invention discloses a clamp for broaching two small holes of a lifting lug, which comprises a clamp body, a trapezoidal support block, a positioning sleeve, a pre-positioning device, a wedge block combination mechanism and a manual adjustment mechanism; the trapezoidal support block is arranged on the clamp body The positioning sleeve is a central through hole structure and is arranged at the center of the clamping body; the pre-positioning device includes a pre-positioning pin for positioning the large hole end of the workpiece, a lifting lug for the workpiece The pre-positioned support screws and supports positioned on the bottom end face; the wedge block combination mechanism is arranged on the trapezoidal support block, and the wedge block combination mechanism is a central through hole structure; the wedge block combination mechanism The inner side faces are expanded so as to be close to the two inner side end faces of the lifting lug of the workpiece; the manual adjustment mechanism is used to control the expansion and contraction of the wedge block combination mechanism. The invention can prevent the deformation of the workpiece when two small holes are broached in an automobile lifting ear part, and can well ensure the dimensional accuracy and coaxiality accuracy of the two small holes.

Description

technical field [0001] The invention relates to the technical field of mechanical processing broaching clamps, in particular to a clamp for broaching two small holes of a lifting lug. Background technique [0002] At present, in the prior art, the lifting lugs at the two ends of the automobile rear leaf spring are generally connected to the brackets of the frame with pins and hinges when the parts are used. So as to play a normal buffering role. When mass-producing spring lifting lug parts, the blank is generally formed by die forging, so that the metal fibers are not cut off as much as possible, so as to maintain a certain toughness and ensure the strength and stiffness requirements during work. In order to obtain good performance, high technical requirements are usually required when machining lifting lug parts. [0003] The machining process of the lifting lug parts is divided into rough milling the two ends of the large hole, drilling and reaming the large hole, fine m...

AI Technical Summary

Problems solved by technology

Especially when broaching the two small holes, the broaching machine tool is used for processing, but because there is a certain error in the size of the end face of each workpiece, the workpiece is easily deformed when the existing fixture is used to broach the two small holes of the lifting lug, and the two broaching The precision of the small hole is not high enough, and the coaxiality error of the two small holes is relatively large, and the overall processing yield is not high, which in turn affects the working accuracy, performance and life of the car

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