Clamping deformation resistant jig for machining large-diameter elbow

Abstract

The invention discloses a clamping deformation resistant jig for machining a large-diameter elbow. Three combined clamping blocks are arranged on a clamping base plate, each combined clamping block consists of an upper clamping block, a lower clamping block, a base plate and connecting bolts, inner sides of the upper clamping blocks and the lower clamping blocks are provided with circular arc-shaped gaps and form a circle consistent with the outer circumference of an elbow to be machined after closed, the upper clamping blocks and the lower clamping blocks are connected and fastened by the connecting bolts, and the base plates are arranged at the bottoms of the lower clamping blocks and are provided with chutes. Lock bolts pass through the chutes on the base plates of the combined clamping blocks and fix the combined clamping blocks on the clamping base plate after being fastened. In the invention, the large-diameter elbow is clamped by adopting a way of directly clamping a pipe blank in a surface-contact manner, thus the elbow does not generate a radial compaction force in the clamping process and is not easy to generate the radial forced deformation and the torsional moment; in addition, the clamping deformation resistant jig disclosed by the invention is applied to machining of a large-diameter thin-wall elbow machine, thereby ensuring the machining precision of the elbow.

Description

technical field [0001] The invention belongs to the field of manufacturing and assembling tooling fixtures for mechanical processing, and relates to a machining fixture, in particular to a large-diameter elbow machining fixture that prevents clamping deformation. Background technique [0002] Due to the processing conditions of the lathe itself and the high-precision requirements of the bevel of the end face of the elbow, the machining of the port of the large-diameter elbow needs to be carried out on a milling and boring machine. Since the contour of the elbow is arc-shaped, the clamping and positioning of the elbow is difficult. Especially for large-diameter elbows, due to the large size of the elbow, according to the traditional machining and clamping method, it is difficult to ensure that the end face of the elbow after processing is flat, and the processing angle is difficult to meet the requirements, and it is not ideal. result. [0003] Aiming at the characteristics...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a large-diameter elbow machining fixture that prevents clamping and deformation, which can overcome the excessive clamping or pressing force of the existing elbow machining fixtures, and make the elbow, especially the thin-walled elbow The problem of the deformation of the head can be solved, so as to prevent the deformation caused by the clamping of the elbow during the machining process, so as to ensure the technical effect of machining accuracy.

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