| 摘要 |
PURPOSE:To obtain a strong wire electrode with good conductivity by coating a steel core wire with a conductive metal applicable with great bond strength that is an electrode material suitable for electric discharge machining. CONSTITUTION:A core wire C is made of a steel wire material basically composed of iron, and a coating layer S is formed by electrodeposition of a conductive metal, such as copper, copper alloy and aluminium, that is suitable for electric discharge machining electrode material around the core wire C to produce a wire electrode 1 having a diameter not more than 0.5mm.. The electrodeposition to form the coating layer S of a metal having good conductivity is carried out by feeding pulse current to the core wire C which is filled with a flow of electrolyte. Coating of the core wire C with a conductive metal can be achieved by, in addition to electrodeposition, plating, dip coating, sintering or others. Electrodeposition, dip coating and plating are reliable and easy to be adopted, while coating by electrodeposition employing pulse current is superior in performance. |
