An electroplating jig for shielding tip effect

Abstract

The invention provides an electroplating clamp capable of preventing a point effect when a fastener is locally electroplated. The electroplating clamp capable of preventing the point effect is mainlycomposed of an outer ring made of non-conducting materials, an insulating inner ring made of plastic, and copper hooks, wherein the whole structural surface of each copper hook is coated with insulating paint for insulation, the excircle diameter of the outer ring made of non-conducting materials is 0.5-2 mm greater than the diameter of the electroplated portion of a part, and the length of the outer ring made of non-conducting materials is smaller than or equal to that of the insulating inner ring made of plastic. When the electroplating clamp is in use, the portion, not to be electroplated,of the part is sleeved with the insulating inner ring made of plastic, then the insulating inner ring made of plastic is sleeved with the outer ring made of non-conducting materials, and finally, thetwo ends of the part are clamped by the copper hooks, so that operation is convenient; and the point portion of the part is shielded by the outer ring made of non-conducting materials, so that the point effect is avoided in the electroplating process, current scrambling of the point end is avoided, and the defects of the prior art are avoided.

Description

Technical field: [0001] The invention relates to a jig, mainly an electroplating jig suitable for avoiding the tip effect when local electroplating of fasteners. Background technique: [0002] The production of fasteners is characterized by small parts and large quantities. In particular, some products require partial plating. For a long time, for products that only require electroplating on the rod, we have used insulating tape and thermoplastic tubes to insulate the head to prevent loosening and falling off. Non-plating parts are insulated with special steel inner ring sleeves. The point negative effect occurs due to the point where the sleeve meets the shank of the part and forms a point face. During the electroplating process, due to the effect of the tip effect, when the electroplating time is only two or three hours, the chromium layer has grown rapidly on the tip surface, and forms dendrites to grow around the end surface. Large, crazily robbed the current, result...

AI Technical Summary

Problems solved by technology

Usually, when electroplating such products, the electroplating is carried out within the maximum range of 24 hours according to the specified time of the process, but due to the tip effect grabbing the current, the satisfactory coating and thickness are still not obtained in the end, and the pass rate is only about 50%.

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