DEVELOPMENT OF ELECTRO-PNEUMATIC VALVE FOR COLD AIR FLOW CONTROL
2002 年 2002 巻 5-3 号 p. 721-726
詳細
2002 年 2002 巻 5-3 号 p. 721-726
Dry-cutting/grinding system utilizing compressed cold air is environment-friendly machining since it uses nocutting/grinding oil and the cutting chips are easy to recycle. In this system, the control valve dealing with the cold air of -10--30°C has to satisfy both the insulation from heat sources around and the linkage with an externalvalve-actuator. The former is avoidance from heat transfer and the latter is connection with heat conductor. For there quirement of two contrary functions, we have developed an electro-pneumatic valve that equips both the vacuuminsulation layer inside and the latch-mechanism using the magnetic force of a permanent magnet. The thermal transmittance of the developed valve, which is the index of the heat conduction into the cold air, indicates about onethirtieth of the conventional value.
