Fixture for multi-hole and multi-plane finishing of disc-shaped large castings

Abstract

The invention discloses a clamp for disc-shaped large casting multi-hole and multi-plane finish machining. The clamp comprises an annular boss arranged on a base. A clamping disc is obliquely connected to the top of the annular boss through a rotating shaft. A plurality of lower positioning pieces are arranged between the clamping disc and the annular boss and fixedly connected to the annular boss. A plurality of upper positioning pieces are connected to the top of the clamping disc. The upper positioning pieces and the lower positioning pieces are arranged in the circumferential direction of the clamping disc respectively. Each upper positioning piece and the corresponding lower positioning piece are provided with a plurality of corresponding connecting holes. Products to be machined penetrate through the connecting holes in the upper and lower positioning pieces through a plurality of connecting pieces to be connected and fixed. The portion, close to the rotating shaft, of the clamping disc is provided with a plurality of clamping devices. The clamp is simple in structure, low in cost and high in clamping stability, collision and damage phenomena caused by repeated clamping are reduced, and machining efficiency and product machining quality are improved.

Description

technical field [0001] The invention relates to the technical field of large parts, especially the finishing of large castings, in particular to a clamp for porous and multi-plane finishing of large disc-shaped castings. Background technique [0002] Large-scale parts, especially long and irregular large-scale castings after casting, need to be finished with multiple surfaces or multiple installation positions after casting to meet the local functionality and connectivity of large-scale castings. Requirements, but especially for large castings with many curved surfaces and complex surface shapes, in the finishing process, whether it is positioning or processing after positioning, the operation requires the cooperation of multiple people at the same time, and each surface and each A part of the processing must be fixed separately, which makes the processing period longer and wastes manpower. During processing, there will also be a phenomenon of knife vibration, which will aff...

AI Technical Summary

Problems solved by technology

[0002] Large-scale parts, especially long and irregular large-scale castings after casting, need to be finished with multiple surfaces or multiple installation positions after casting to meet the local functionality and connectivity of large-scale castings. Requirements, but especially for large castings with many curved surfaces and complex surface shapes, in the finishing process, whether it is positioning or processing after positioning, the operation requires the cooperation of multiple people at the same time, and each surface and each A part of the processing must be fixed separately, which makes the processing period longer and wastes manpower. During processing, there will also be a phenomenon of knife vibration, which will affect the local dimensional accuracy of the large casting to be processed. In severe cases, it will cause scrapping and positioning. The accuracy is not good

And each positioning may require different fixtures, and the cost is relatively high

[0003] For large spherical parts or castings, when clamping, due to unstable clamping, it will cause tool vibration of the processed parts, resulting in insufficient surface finish of the processed parts and inaccurate processing dimensions.

In addition, during the finishing process of large spherical parts or castings, repeated clamping and repeated positioning are required. Different processing directions require separate positioning, which is time-consuming and laborious, with a long construction period and inaccurate positioning accuracy.

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