Functional Surface Modification by Forced Discharge Dispersion.

通过电火花加工在工件或结构件表面形成一种功能表面，使放电被强制分散。为了分散放电，用掺杂硅片作为电极，或用硅粉混合油作为工作液。束状导线也被用作放电分散的电极。通过这些方法，实现了工件表面无裂纹细小的加工。此外，还可以使用细丝电极或绿色紧凑型电极在工作件上附着材料。用这些电极加工的表面，特别是用硅电极加工的表面，具有显著的耐腐蚀性。采用TiC绿色紧凑型电极对表面进行改性处理，表面硬度可达2000Hv以上，且在切割过程中具有较高的耐磨性。采用多根细丝组成的点阵式加工单元进行快速成型加工。通过在每根细丝上分布足够的脉冲来实现毫米量级的无裂纹加工，在实际加工中证实了这些方法可以对冷锻模具或刀具刃口进行表面修整。

This study aism to generate a functional surface on a work piece or on the surface of structural elements by electrical discharge machining in whch discharges are forced to disperse.In order to disperse discharges, a doped silicon plate is used as an elctrode or silicon powder mixed oil is used as working fluid. Bundled wires are also used as the electrode for the discharge dispersion. Crack less fine surface is realized on the work piece by means of those methods. Furthermore, a thin wire electrode or a green compact electrode is used for materials accretion on a work piece. The surfaces machined with these electrodes especially with a silicon electrode have remarkable corrosion resistance. The hardness of the modified surface by a TiC green compact electrode gets more than 2000Hv and it has high wear resistance in cutting process.Some end effecters with inch worm mechanism are developed for electrical discharge machining by use of a robot or traditional machine tools. Dot matrix type machining unit with several thin wires are used for rapid prototyping process. Millimeter order crack less machining is realized by adequate pulse distribution onto each thin wire.It has been confirmed that the surface of a cold forging die or a cutting tool edge can be modified by these methods in practical processes.