Abstract
Recently, there has been a tendency in the industry to use electrochemical processing methods based on the use of milli- and microsecond pulses of different polarity and amplitude instead of a direct current. The use of a pulsed current in many cases makes it possible to obtain the desired effect by cheaper means and to provide additional controllability of the electrochemical process by adjusting the time parameters of the current pulses. This also ensures reduction of the energy costs of the polishing and cleaning process of surfaces as compared to direct current processing and increasing the efficiency of processing when the rate of smoothing the surface microroughness referred to the total removal of the metal rises significantly. For example, the application of bipolar pulses in polishing of many metallic materials eliminates the use of expensive and hazardous chromium electrolytes. The use of pulse mode during electrolyte-plasma polishing makes it possible to achieve the reduction of energy consumption and to increase of process efficiency while maintaining high intensity, processing quality and environmental safety. In order to study the effect of pulses parameters and the duration of a pause between them on the characteristics of the surface of parts made of various metallic materials in electrochemical and electrolyte-plasma processing modes the special power supply was modeled, designed and manufactured. The power supply provides the possibility of regulation frequency, the duration of the positive and negative pulses and the duration of the pauses between them a wide range. It makes it possible to generate current pulses up to 50 A at a voltage of 0 to 400 V of positive and negative polarities and is able to regulate their duration in the range from 10.0 μs to 8.1 s with the possibility of changing the ratio of the pulse duration and pauses from 1:1 to 1:9.
Highlights
Исследования показали, что электрохимические процессы, связанные с анодным растворением и пассивацией, развиваются не сразу, а с различной динамикой в микро- и миллисекундном диапазоне времени [1, 2]
There has been a tendency in the industry to use electrochemical processing methods based on the use of milli- and microsecond pulses of different polarity and amplitude instead of a direct current
In order to study the effect of pulses parameters and the duration of a pause between them on the characteristics of the surface of parts made of various metallic materials in electrochemical and electrolyte-plasma processing modes the special power supply was modeled, designed and manufactured
Summary
Применение биполярных импульсов при полировании многих металлических материалов позволяет отказаться от использования дорогостоящих и вредных хромсодержащих электролитов. Для исследования влияния временных параметров импульсов тока, а также длительности пауз между ними на характеристики поверхности деталей из различных металлических материалов в процессе электрохимической обработки и при переходе процессов в область электролитно-плазменной обработки при повышении напряжения смоделирован, разработан и изготовлен специальный источник питания, обеспечивающий возможность регулирования частоты, длительности положительного и отрицательного импульсов, а также пауз между ними в широком диапазоне. Разработанный источник питания позволяет формировать импульсы тока до 50 А при напряжении от 0 до 400 В положительной и отрицательной полярностей и способен регулировать их длительность в диапазоне от 10,0 мкс до 8,1 с при возможности изменения соотношения длительности импульсов и пауз от 1:1 до 1:9.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
