Views: 1 Author: Site Editor Publish Time: 2022-11-02 Origin: Site
Our daily by the coil in the most common applications are: motor inductance transformer and loop antenna, etc In life we often encounter when using coil were black, black the reason is simple: the oxidation of copper wire, metal oxide black is this industry But the specific cause of copper oxide and improve the method is very complicated to suit the remedy to the case Dongguan Fuying Electronics has been engaged in coil production and manufacturing for more than 20 years, and has accumulated rich experience in coil design and production, fault troubleshooting. Next, we will explain the reasons for the blackening of the coil to you Before some manufacturers use the commonality of copper rod, copper content can be up to 99.95%, but even so, there are still 0.05% of copper impurities, the hard to avoid in the process of processing the surface of the copper will be exposed to air and oxidation Now with domestic copper smelting technology, using the domestic oxygen-free copper, it has been greatly improved the black copper wire of the problem But due to the processing of the copper rod, especially copper wire core anneal process and finished product storage condition is bad, the copper wire itself would have slight oxide copper wire insulation problems Copper wire insulating paint can be divided into impregnating varnish Enameled wire paint covering paint silicon steel sheet varnish corona proof paint etc. Five categories One of impregnating varnish is used as a dip motor, electric appliance coil Impregnation paint can play a gap in the insulation system and fill the microhole, and form a continuous film on the surface of the impregnated material, and make the coil bonded into a solid whole, effectively improve the integrity of the insulation system, thermal conductivity, moisture resistance, dielectric strength and mechanical strength of the performance Secondly, it also plays the role of heat dissipation. If the insulating paint is soaked, the coil after drying can be regarded as a whole, and the inner and outer layers of heat can be easily transmitted, so as to play the role of heat emission Or relatively relatively backward, the production and processing of macerate paint time is easy to drop, the phenomenon of failure three use of environmental problems We in the process of using the coil copper wire, often there will be collision friction, washing slowly, a large amount of moisture and contact with the coil, the use of waste oil lubrication, resulting in conductor surface residue and insulation layer damage, resulting in the subsequent processing of conductor oxidized four copper wire annealing process Copper wire annealing is the copper wire slowly heating to a certain high temperature after a period of time, and then at the corresponding rate of cooling a metal heat treatment copper wire annealing can reduce the hardness, improve the cutting machinability to eliminate residual stress, stable size, reduce deformation and crack tendency; Refine the grain, adjust the organization, eliminate the organization defects but according to the experience of Fuying coil once the temperature is higher than 50 in the production process, the prescribed pumping time is insufficient, the content of SO2 is high, the protection gas is not pure will cause the shortage of annealing, after a period of time the copper wire will be easy to black.