Expansion fixture device

A technology of expanding and clamping, applied in the direction of expanding the mandrel, etc., can solve the problems of inner hole surface damage, part cracks, outer circle deformation, etc.

Inactive Publication Date: 2015-02-25
CHANGZHOU CHANGOU METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment Construction

[0012] As shown in the figure, the external expansion fixture device consists of a pull rod 1, a flat petal body 2, a tension spring 3, a wedge block 4 and a clamp body 5. The clamp body 5 is provided with a central through hole, and the pull rod 1 is provided with a central through hole. Inside, six uneven axial long grooves are milled on the outer surface of the right side of the clamp body 5, and six flat petals 2 that can form a full circle are arranged in the axial long grooves. The full circle shape can ensure the surface quality of the inner hole of the workpiece. The flat petal body 2 is provided with a groove for a set tension spring 3, and the tension spring 3 is arranged in the groove, and the two tension springs 3 compress the six flat petal bodies 2 together without separation, and the flat petal body 2 The lower surface is provided with a tapered surface, the wedge-shaped block 4 is placed in the center hole of the clamp body, and is threadedly connected with the ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B31/40
CPCB23B31/404
Inventor 周黎仙
Owner CHANGZHOU CHANGOU METAL PROD
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