| 摘要 |
PROBLEM TO BE SOLVED: To provide a jump control device of a die sinking electric discharge machine for shortening processing time, and improving processing accuracy, by quickly and surely discharging sludge, regardless of a difference in a processing shape. SOLUTION: This jump control device has a shaft feed control part 7 for controlling a vertical position of an electrode 1 to a workpiece 2 by controlling a driving quantity of a main spindle 4, and a jump condition inferring part 8 for inputting a jump condition to the shaft feed control part 7 by inferring the jump condition including at least one of a jump-up quantity ju and a jump speed jmp for allowing the electrode 1 to make jump motion after pulse discharge, by using at least one of the length (h) up to an upper surface of the workpiece 2 from a processing surface on the tip of the electrode 1, the outer peripheral length L of the electrode 1 in the upper surface of the workpiece 2, the processing area S on the tip of the electrode 1, clearance (d) between the electrode 1 and the workpiece 2, a tip width (w) of the electrode 1, kinematic viscosity (n) of a processing liquid and a Reynold's number Re of the processing liquid. The shaft feed control part 7 performs feedforward control on the electrode 1 by using the jump condition inferred by the jump condition inferring part 8. COPYRIGHT: (C)2006,JPO&NCIPI
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