EDT 程序参数对毛化表面质量的影响

(Baoshan branch, Baosteel Industry Inspection Company, Shanghai,200431)
Abstract This paper sketches the principle and purpose of EDT,and analyzes the relationship between electronical
parameters as well as the influence of each parameter (On-Time, Discharging current, Gap Voltage, etc) on the quality of
texturing surface (Ra,Pc,Rsk) in texturing program, besides, we build the preliminary maths model between main
parameters and Ra.So,besides picking up process parameters from technics data-base,we acquire a new method to obtain
and optimize texturing parameters，in order to predict and control surface of texturing roll, improve the efficiency and
stability of EDT process,and achieve optimal surface quality of cold-rolling plate.
Key words EDT, Ra, Pc
, Rsk
1 电火花毛化的原理
1
电火花毛化(Electro-Discharge Texturing,简称EDT)是依靠脉冲放电所产生的电腐蚀来完成轧辊表面加工
的。毛化过程中，电极和轧辊毛化部分浸入绝缘液中。对电极施加直流脉冲电压，由伺服系统控制电极与轧
辊间放电间隙，当间隙达到0.01～0.2mm时，绝缘液被击穿，然后在低压打毛脉冲下形成放电通道。轧辊表
面金属和电极熔化或气化，并进入产生的蒸气泡中。在放电结束时，气泡破裂，熔化的金属被抛出，使轧辊
表面形成放电凹坑。电火花的形成发生在很短的时间内，毛化时，其发生频率在4～400kHz范围内。在轧
辊旋转及轴向移动的共同作用下，最终产生一个由均匀尺寸和形状的重叠环形凹坑组成的轧辊表面