A double-sided finishing fixture for large thin-walled flanges and flange processing technology

Abstract

The invention relates to the technical field of mechanical processing technology equipment, in particular to a double-sided finishing fixture for a large thin-walled flange and a flange processing technology, including an upper permanent magnetic disk, a lower permanent magnetic disk, a non-magnetically conductive intermediate connecting disk, and several guides. Rotary positioning claws made of magnetic materials, the upper permanent disk and the lower permanent disk are fixed into one body through the intermediate connection disk, and are located between the lower end surface of the upper permanent disk, the upper end surface of the lower permanent disk, and the outer circle of the intermediate connection disk. A space for an annular groove is formed; the rotary positioning claw is provided with a rotating shaft, an upper positioning claw, and a lower positioning claw, and the rotary positioning claw is installed on the upper permanent magnetic disk and the lower positioning claw of the space part of the annular groove through the rotating shaft. Between the permanent disks, the upper positioning claw and the lower positioning claw are arranged in opposite directions around the center of the rotating shaft. Adopting the present invention can realize fast switching between the positioning of the lower end face of the flange and the positioning of the upper end face of the flange without hoisting and turning over the flange, and has high processing efficiency and good processing precision.

Description

technical field [0001] The invention relates to the technical field of mechanical processing equipment, in particular to a double-sided finishing fixture for a large thin-walled flange. Background technique [0002] Flanges are widely used in industrial equipment, and the most commonly used flange material is carbon steel. In many important applications, flanges are required to have high dimensional accuracy and geometric tolerance accuracy, including better roundness of the inner and outer circles of the flange, better flatness of the flange itself, and better flatness of the flange itself. The hole and the outer circle must have better concentricity, and the upper and lower end surfaces of the flange must have better parallelism, etc. [0003] In the prior art, for the processing of large thin-walled flanges, a vertical lathe is usually used for lathe processing, specifically, a universal chuck or a special clamping tool installed on the vertical lathe workbench is used t...

AI Technical Summary

Problems solved by technology

[0004] However, there are two problems in the finishing or semi-finishing machining of large thin-walled flanges using the existing lathing technology: one is that the flanges will be deformed after being clamped on the vertical lathe due to the poor rigidity of the large thin-walled flanges. A certain clamping deformation occurs. When the flange processing is completed, the elastic deformation of the flange recovers after the clamping is released, resulting in the loss of roundness, flatness and parallelism of the flange; the second is that the flange needs to process the outer circle, the inner The surface of the four positions of the hole, the upper end surface, and the lower end surface, so it needs to be clamped several times during the processing process. Face adjustment processing, etc., and the flange needs to be hoisted and turned over for surface adjustment processing

However, the large thin-walled flange itself is heavy in weight and poor in rigidity. Multiple clamping and hoisting turning over will not only reduce the processing efficiency, but also cause certain clamping and hoisting deformation of the flange, and produce two clamping The positioning error of the flange can easily lead to out-of-tolerance accuracy indicators such as roundness, concentricity, flatness, and parallelism after the final processing of the flange.

Images