Perforated Metal Sheets - The Ultimate FAQ Guide | CNstamping

Perforated screen plating is to add a plating layer on the surface by using electrode reaction to form a coating on the surface of precision stamping parts. The material (workpiece) with a conductive surface is used as the cathode, and the dissolved metal (Ni, Sn/Pb, etc.) is used as the anode. It is placed in an electrolyte solution. Under the action of external direct current, the anode metal It dissolves into metal ions and precipitates on the cathode (workpiece) to form an electroplated layer firmly bonded to the work piece.

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The reason of material pulling during micro-hole stamping is that the punch die is not separated from the sheet material in time, which causes the material to be stripped. The punch die return spring force can be increased and replaced if necessary. The punch lift the stainless steel micro-hole mesh but failed to extract it from the stainless steel micro-hole mesh. The stripping was caused by insufficient unloading force. When the punch moved upward, the sheet did not leave the punching needle and moved upward with the sheet. 

Generally, only two processes: heating and cooling are used for tooling heat treatment.

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Before heated the precision stamping die, first buried & sealed the mold in the underground pit furnace, secondly add carbon-rich liquid to the furnace; (those liquid can be decomposed into carbon atoms at high temperature and penetrate into the micro-hole mold). Thirdly put the mold in a preheated furnace, wait for a period of time to reach the preset temperature and keep it warm, finally take out the mold.

Place the heated stamping mesh tooling in a cooling tank, the cooling method used here is quenching. There is an aqueous solution or oil in the quenching pool, put the punching die in for a period of time and take it out; then heat it with a high-frequency machine (it is a super high-power machine that changes 50HZ frequency into 200HZ current) to complete the quenching process.

Micro-hole stamping die heat treatment only used heating and cooling method, but generally, there are three processes for heat treatment: heating, heat preservation, and cooling.