Micro-arc oxidation tool for inner surfaces of connecting nuts

Abstract

The invention belongs to the technical field of nuclear power product manufacturing, and particularly relates to a micro-arc oxidation tool for the inner surfaces of connecting nuts. The tail parts of the connecting nuts are placed in the nut tail position of a lower fixing seat, an upper fixing seat is pressed above the lower fixing seat, and meanwhile, the head parts of the connecting nuts are placed in the nut head position of the upper fixing seat; bolt holes are machined in the upper fixing seat and the lower fixing seat, the upper fixing seat is rotated, the bolt holes of the upper fixing seat and the lower fixing seat are aligned, bolts are inserted into the bolt holes, the upper fixing seat and the lower fixing seat are tightly pressed through nuts, and the connecting nuts are firmly fixed between the upper fixing seat and the lower fixing seat; and the upper fixing seat and the lower fixing seat are each provided with an auxiliary cathode positioning hole, an auxiliary cathode stainless steel wire is inserted into the auxiliary cathode positioning hole of the lower fixing seat through the auxiliary cathode positioning hole of the upper fixing seat, centering positioning and fixing of the auxiliary cathode are achieved, and the auxiliary cathode penetrates through inner cavities of the connecting nuts. The micro-arc oxidation of the ceramic film layer on the inner surfaces of the connecting nuts can be realized.

Description

technical field [0001] The invention belongs to the technical field of nuclear power products and its manufacturing technology and manufacturing process, and in particular relates to a micro-arc oxidation tooling for the inner surface of a connecting nut. Background technique [0002] The micro-arc oxidation process mainly relies on the matching and adjustment of the electrolyte and the electrical parameters of the micro-arc oxidation. The modified ceramic film layer mainly and supplemented with electrolyte components has significantly better anti-corrosion and wear resistance than traditional anodic oxidation coatings. To prepare the ceramic film layer on the inner surface of the connecting nut with a small aperture of Φ3mm, the following problems need to be solved: (1) The micro-arc oxidation of the inner cavity of the lock nut must be realized with the aid of the auxiliary cathode, and the centering accuracy of the auxiliary cathode must be ensured to avoid Swing occurs ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a micro-arc oxidation tooling on the inner surface of the connecting nut, which solves the problem of poor quality of the micro-arc oxidation film caused by the short circuit caused by the inability of the auxiliary cathode to be centered and the poor circulation of the solution, and realizes the micro-arc oxidation in the inner cavity of the connecting nut. Micro-arc oxidation ceramic coating

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