| 摘要 |
PROBLEM TO BE SOLVED: To provide a wire cut electric discharge machine supplying a working liquid whose temperature is controlled from a clear water tank or a waste water tank to the working tank and controlling the water temperature of the working liquid in the working tank constant. SOLUTION: The water temperature of the working liquid in the working tank is detected by a temperature sensor, and a detected water temperature value Td is obtained (SA1). A difference valueΔT of the detected water temperature value Td and a reference water temperature value Tth preset inside a control device is obtained (SA2). Whether the difference valueΔT is greater than an allowable difference valueΔt(≥0) is determined, and when the difference valueΔT is greater than the allowable difference valueΔt, a step SA4 is executed, whereas when the difference valueΔT is the allowable difference valueΔt or below, a step SA5 is executed (SA3). A working liquid storing pump is driven so that the number of revolution of the working liquid storing pump is proportional to the difference valueΔT, and the process of this control cycle is finished (SA4). Drive of the working liquid storing pump is stopped, and the process of this control cycle is finished (SA5). COPYRIGHT: (C)2011,JPO&INPIT
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