Poor heat dissipation on the local surface of the part leads to dissolution of the part

(1) Improve the existing tooling, change the auxiliary cathode rod in the center hole of the part to a hollow tube, add a through hole in the lower half of the tube wall of the hollow tube, and connect the hollow tube with the compressed air pipeline to accelerate the internal Due to the unstable rising trajectory of the compressed air at the bottom of the tank, it cannot rely solely on the agitation of the compressed air at the bottom of the tank. It is necessary to separately install compressed air pipes on the parts. For such parts, the aluminum rod used in the oxidation process is changed to hollow Aluminum tube, the bottom of the aluminum tube is blocked, and small holes are evenly drilled in the lower 1/3 area. As an auxiliary cathode, it also acts as a compressed gas stirring tube. Connect the aluminum rod to the power cathode, and use a plastic hose to connect it Connected with the compressed air of the production line, in this way, during the hard oxidation process, the mixing problem of the inner hole solution of the part is solved, and the local overheating of the inner hole solution is avoided, causing the part to dissolve.

(2) Improve the layout of the compressed air stirring pipelines of the hard oxidation tank, add a compressed air stirring tube, improve the stirring ability of the compressed air to the tank liquid, and promote the heat dissipation of the inner holes of the parts. After the cross-sectional area of the existing tank is increased The solution mixing effect is not good, add a manual pipeline to the two original compressed air design of the production line to strengthen the solution mixing effect