Terminals-electroplating process and production process of metal stamping processing terminals

The electroplating process and production process of terminal blocks and metal stamping processing terminals. Terminals processed by stamping metal processing are only raw materials and must be electroplated before they can be used on connectors. In order to improve efficiency, high-speed selective continuous electroplating is now used. Let me introduce to you the electroplating process and production process of the terminal: terminal processing 1. Electroplating purpose: to prevent oxidation of the material, reduce the contact resistance, increase the solder resistance, and increase the wear resistance, it directly affects the electrical conduction of the line, the connector 2. The understanding of electroplating is that in the connector manufacturing, coating on the contact shrapnel is the most widely used method. Electroplating is the deposition of metal ions in the electroplating solution to the cathode, and the metal ions can come from the solubility in the electroplating solution. The anode, to supplement the metal ions deposited on the cathode. In this simple unit, the deposition and electroplating process is mainly controlled by the chemical action of the solution and the current distribution on the cathode surface. The plating material, such as gold, is deposited on different points of the underlying base metal and gradually thickens on the surface of the plating during the electroplating process. When a certain thickness is reached, the plating layer'completely' covers the surface of the underlying metal. That is, the degree of coating coverage is determined by the surface characteristics and cleanliness of the base metal and the electroplating process. The most common disadvantage of the electroplating process is that there are many pores in the coating. This kind of pores with many pores is called porosity. 3. Electroplating principle Electroplating is a method of surface treatment. It uses electrode reaction to form a coating on the surface of the workpiece. 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. In the electrolyte solution, under the action of external direct current, the anode metal is dissolved into metal ions and precipitated on the cathode (workpiece), thereby forming a plating layer that is firmly combined with the workpiece. 4. The terminal plating layer material is generally nickel (Ni). ) The bottom layer, and then selectively plating tin/lead (Sn/Pb), gold (Au) or palladium (Pd) and other metals as needed. The plating layer is very thin, and the general unit is mile (u'). 1 u'u003d 1 Micro inch u003d 10-6 × 25.4 mm u003d 1/400 × 0.01mm u003d 1/400 1u u003d 39.4 u'5. Introduction to the continuous plating process a. Warm punching and discharging: confirm the quality of the stamping materials, and connect the terminals to be plated Into the warming belt of the electroplating machine. b. Chemical degreasing: Cathodic electrolytic degreasing is used for the purpose of degreasing. c. Electrolytic degreasing: The cathode electrolytic degreasing method is adopted for the purpose of degreasing. d. The purpose of washing with water is to wash away the alkaline degreasing liquid stuck to the material belt, so as not to bring it into the next station and neutralize excessive acid. e. Acid activation: the purpose is to remove the surface oxide (CuO) of the material and neutralize the alkali that is too degreasing. f. Secondary washing: wash away the sulfuric acid on the surface of the material. g. Ni plating: The purpose is to make a base for protection. Ni plating must be covered with Au and Sn/Pb immediately, otherwise it is easy to be oxidized and the guide wheel cannot spark, otherwise it is easy to peel off and produce pinholes. h. Recovery water washing: the purpose is to wash and recover the Ni taken out. i. Washing: The purpose is to prevent Ni from being brought into the lower station. j. Sn/Pb plating: purpose to improve terminal solderability. k. Post-treatment: including hot water washing → blunt water washing → drying → drying, the purpose is to remove the chemical solution attached to the surface of the terminal, so that the terminal is in a dry environment and prevent the terminal from corrosion and discoloration. l. Receipt: confirm the quantity and quality, and paste the label. n. The development of the warehousing society is inseparable from the wide application of the electronics industry, the rapid technological update, and the innovation of terminal technology in electronic products. Welcome new and old customers to call or write to us. Dongguan Precision Electronics Co., Ltd. will work with you Share achievements, win-win cooperation, and develop together!