Expansion fixture device

Abstract

The invention relates to the technical field of fixtures, in particular to an expansion fixture device. The expansion fixture device is characterized by being composed of a pull rod, flat section bodies, extension springs, a wedge block and a fixture body. A center through hole is formed inside the fixture body, and the pull rod is arranged inside the center through hole. The outer surface of the right side of the fixture body is provided with six evenly-distributed axial long grooves in a milling mode, and the six flat section bodies capable of forming a complete circle are arranged in the axial long grooves. The exterior of each flat section body is provided with a groove, and the extension springs are arranged in the grooves in a sleeved mode. The lower surface of each flat section body is provided with a conical surface. The wedge block is arranged in the center hole of the fixture body, connected with the pull rod through threads and provided with six evenly-distributed inclined grooves which are matched with the conical surfaces of the lower portions of the flat section bodies respectively, and a hexagon screw head is welded to the right end face of the wedge block. The expansion fixture device is simple in structure, and the wedge block is of a complete circle type.

Description

technical field [0001] The invention relates to the technical field of clamps, in particular to an expansion clamp device. Background technique [0002] When processing workpieces, sometimes external expansion self-centering fixtures are used. The current fixtures have been finished in the inner hole of the workpiece. The existing external expansion fixtures are easy to damage the finished inner hole surface, and even make the cast iron Cracks appear in parts of brittle materials, and when the workpiece is thin, it is easy to deform, so that the processed outer circle retains the deformed shape. Contents of the invention [0003] In order to overcome the disadvantages of the above-mentioned technical problems, the present invention provides a simple structure, wedge-shaped block full-circle outward expansion fixture device. [0004] The technical scheme that solves the above-mentioned technical problem is as follows: [0005] The external expansion fixture device consist...

AI Technical Summary

Problems solved by technology

[0002] When processing workpieces, sometimes external expansion self-centering fixtures are used. The current fixtures have been finished in the inner hole of the workpiece. The existing external expansion fixtures are easy to damage the finished inner hole surface, and even make the cast iron Cracks appear in parts of brittle materials, and when the workpiece is thin, it is easy to deform, so that the processed outer circle retains the deformed shape

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