Copper bar continuous travelling tinning method and equipment

Abstract

The invention discloses a copper bar continuous travelling tinning method and equipment, which includes the follows steps: step S101 is that a to-be-tinned copper bar of 4 to 6 meters in length undergoes ultrasonic thermal bebinding and water-spray washing through a transmission system; step S102 is that the to-be-tinned copper bar undergoes electrolytic degreasing and water-spray washing; step S103 is that to-be-tinned copper bar undergoes acid activating and water-spray washing; step S104 is that the to-be-tinned copper bar undergoes pre-pickling and purified water washing; step S105 is that the to-be-tinned copper bar undergoes tinning and connected with a conducting wheel in a sliding way, and the flowing cooling water pipe on the upper side of the conducting wheel performs water-spray washing after the tinning; step S106 is that the tinned copper bar undergoes hot water washing, weak acid neutralization and water-spray washing; and step S107 is that the tinned copper bar undergoes hot water washing and drying through blowing, so as to obtain the finished product. The method and equipment enable the to-be-tinned copper bar to continuously travel at a uniform speed in the electroplating baths through the transmission system, can electroplate under high current density, and improve the tinning efficiency; the surface of the tinned surface is uniform, smooth and is highly anti-corrosive, the harmful waste gases as alkali and acid mist produced during the tinning process can be purified by the equipment, and the equipment doesn't pollute the environment.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a continuous moving tinning method and equipment for copper bars. Background technique [0002] In the important industrial fields of electric power, electrician, and electricity, copper bars are widely used in electrical switch engineering (such as power distribution cabinets, transformers, power transmission and transformation) as conductive connection carriers. In order to prevent oxidation and improve conductivity, especially in copper bars The overlapping parts need to be coated to prevent oxidation. [0003] At present, the copper bar uses the hanging tinning method. At least one anode plate and cathode plate are installed in the tank. The anode plate is connected to the positive pole of the power supply. To connect the contacts, there is a gap between the anode plate and the copper bar. The copper bar suspended by the hanger is partially or entirely placed in the e...

AI Technical Summary

Problems solved by technology

[0003] At present, the copper bar uses the hanging tinning method. At least one anode plate and cathode plate are installed in the tank. The anode plate is connected to the positive pole of the power supply. To connect the contacts, there is a gap between the anode plate and the copper bar. The copper bar suspended by the hanger is partially or entirely placed in the electroplating bath, and a layer of tin plating is plated on the surface of the copper bar to prevent oxidation, but , in the electroplating process of this process, the contact point between the copper bar suspended by the hanger and the power supply is fixed, and the current density around the electrical connection contact point increases with the farther away from the fixed electrical contact, and the corresponding current The smaller the density, the uneven electroplating layer on the surface of the copper bar and the unevenness of the surface. Moreover, as the power-on time increases, the surface temperature of the electrical connection contact point of the copper bar rises sharply, and the electrical connection contact point of the copper bar rises sharply. The higher the temperature, the lower the current density on the surface, which will lead to a decrease in the electroplating efficiency; in this process, the electroplating tank is in an open state. When the copper bar is electroplated, the plating solution in the tank is heated and volatilized, and the acid mist exhaust gas generated by electroplating cannot be sealed. Collection and treatment, exhaust gas cannot be sealed, acid mist permeates the space, poor working environment, seriously affects the environment, acid mist is harmful to health

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