Fixing device for workpiece inner hole machining

Abstract

The invention provides a fixing device for workpiece inner hole machining. The fixing device comprises bases, positioning blocks and clamps, wherein each positioning block is connected with the corresponding base; each clamp is arranged on the corresponding base and is connected with the corresponding base; the positioning blocks are used for determining positions of the clamps; the clamps are used for clamping a workpiece subjected to inner hole machining; each clamp is provided with conical convex structures; and the convex structures prick into the surface of the workpiece, so that clamping force is reduced while tight clamping is ensured, and machining precision of the workpiece.

Description

technical field [0001] The invention relates to the technical field of fixtures, in particular to a fixing device based on inner hole processing and its application. Background technique [0002] At present, when many thin-walled rotating aluminum alloy workpieces are processed on ordinary CNC lathes, hydraulic three-jaws are usually used or welding materials are added to the three-jaws to increase the clamping of the contact surface with the workpiece. The traditional three-jaw When the jaw chuck is clamped, when the clamping force is released, the workpiece is seriously deformed, and the roundness tolerance of the inner hole exceeds the requirement of the inner hole size tolerance. At the same time, the roundness of the inner hole is irregular, and the tightening and positioning are unstable during subsequent processing. It directly affects the machining accuracy. In the final analysis, the workpiece is too thin and deformed during the clamping process. [0003] In order ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem that the clamping force of the fixture device for the processing of the inner hole of the existing thin-walled workpiece is too large, which causes the workpiece to be deformed by compression, so that the size of the inner hole exceeds the required precision. A workpiece inner hole processing and fixing device, the fixing device includes a base, a positioning block, and a clamp, the positioning block is connected to the base, the clamp is arranged on the base and connected to the base, and the positioning block is used In order to determine the position of the clamp, the clamp is used to clamp the workpiece that needs to be processed in the inner hole, and the tapered protrusion structure is arranged on the clamp, and the protrusion structure is used to penetrate into the surface of the workpiece to ensure clamping while reducing pressure. The small clamping force improves the precision of workpiece processing, and through the flexible connection design of the clamp and the base, it can be clamped even when the outer surface of the workpiece is irregular, which improves the versatility of the fixture

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