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Hard chrome plastic mechanical shaft power
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[日期：2007-4-25 11:31:36]
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Hard chrome plastic mechanical shaft power! Chromium Plating and the quality is directly related to the stability of the current density. Chromium Plating parts of a direct impact on the quality of the surface, in order to guarantee the quality of coating parts, normally used to the cycle of change, Current improve efficiency and speed electroplating, crystalline coating meticulous, well-distributed, scalability and strong, abrasion resistance, corrosion resistance can be strong. These processes are carried out at different current densities, we have to ask DC pulse controlled in a certain range. With the development of electronic technology, electroplating workers already feel superior to the vast majority of ordinary thyristor rectifier DC power supply. But Thyristor Controlled process, with the conduction angle of the changes, which have caused a large difference between the peak and average. as a result, the current density smoothing disconnected. According to the information already concluded that the power factor is greater than 5% of the ripple caused the grain scheduling shift chromium plating. In this new way of thinking under the guidance SCR Design October 2001, I built a 15000A/12V pros and low output ripple power each of the different types of test equipment products chromium plating. 1, chromium plating layer of modern technology is the guarantee of high-quality single-phase full-wave using electroplating workers. Six-phase and three-phase half-wave rectifier power supply chrome plating and chromium plating layer appeared black, gray, white. I take the original factory parts to conduct a six-phase rectifier chromium plating, life test only half of the product life indicators. Power workers of these precious data is the basis for creating new products. The general trend is that the current power supply components used since closing Transistor and its turn-off thyristor. discrete-control mode (digital) and continuous (analogue). The former uses a PWM control principles, power constraints, second breakdown and complex manufacturing process, the corresponding costs are relatively high. The latter six-phase rectifier increases Crystal Gateway smoothing reactor, the ripple factor of less than 1%. 15000A/12V power rectifier in the voltage smoothing reactor to 3~4V loss is relatively large. Power levels of chromium plating on the performance requirements are relatively high. Ripple factor in the accuracy and stability, especially chromium plating process control curve, only to maintain the current density accuracy can we guarantee the quality and stability of the chromium-plating. According to the information and experience Bath solution in the current density is greater than a certain value until they produce a chemical reaction. Factor in general ripple rated at 20% of spare parts under the current or voltage, ripple factor of less than 5%. asked the accuracy of 1%. To ensure that performance is required to achieve the above process, I design low ripple KF power (see figure), which are characterized as follows : (1) Multi-phase generator used to reduce the ripple factor, reduce energy loss and improve network harmonic disturbance; (2) regulation, and two-channel continuous loop over the PI regulator, tracking speed, high accuracy; (3) control, according to user requirements soft start, manual cycle to change, curve control and computer control interface; (4) the protection functions, the limit pressure, limiting, overvoltage and overcurrent, undercompaction, phase-, and short-circuit protection function; (5) adoption of multiphase converter 10000 following the loop balanced power reactor. The main circuit is not used more than 10000 Power Reactor balance, the use of multi-phase generator, so that equipment is simple, good heat dissipation. 2, KF : key data in practical application and use, the bath for resistive and capacitive load. Sv also be measured by the decline of fiber. 3. KF Rectifier performance comparison with the quality of chromium plating : (1). by the quality of chromium plating current density stability of the Division I KF-15000A power used in process control process. → conflicts -- such as cleaning process workpiece and the workpiece so electroless plating layer rapid integration → creamy white crystalline evenly → slow or chromium plating layer transition Smoothing to reduce the stress of two layers of chromium and chromium layer nuclei are linked closely, using static control precision, Ripple factor in the low performance, guarantee the stability of the current density. The rectifier and two other rectifier Life Test contrast, in high temperature, high pressure, strong wear and corrosion under the conditions of strong, the rectifier better than other structures. (2) Due to the current Auto plating quality and output current regulator small plating larger workpieces, Plating interface using two relatively clear. KF rectifier output current, voltage regulation for smooth workpiece surface plating to achieve a uniform, Electroplating rate will increase 180%. (3) large-scale workpiece quality and smoothing chromium plating thyristor rectifier current density due to the phase difference The difference between peak and average output different. The lower the number the more peak phase, in the smaller role of anti-peace wave, the output current pulse of the small, Because of its high frequency, low voltage addition, it will be very easy to make current row. So KF Rectifier Corporation successfully completed the coordination of all major companies electroplating. (4) chromium plating on the quality and reliability of the system power supply is unreliable, for a metal plating bath in the intergranular corrosion. selective corrosion, stress corrosion combined, the result was exacerbated by the workpiece surface micro-roughness. Meanwhile, the process of corrosion on the surface of the hydrogen adsorption of hydrogen generated over the amount of balance, exacerbated by coating embrittlement. 10000~10010A in precision measured changes in current, voltage 11V unchanged. KF 11000~12000A rectifier current scope of the changes. 10.00~10.10V voltage changes. 4. 1985 KF series rectifier. Stability and chromium plating current density is based on the quality and the surface treatment, the impact on the quality of the workpiece more comprehensive and integrated design. Under the conditions of modern technology, KF series rectifier achieve a better indicator. |
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