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PRESSURE EQUALIZING DEVICE FOR DIE CUSHION PIN AND METHOD FOR PREDETERMINING PEAK OIL PRESSURE
PRESSURE EQUALIZING DEVICE FOR DIE CUSHION PIN AND METHOD FOR PREDETERMINING PEAK OIL PRESSURE
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机译：模具垫销的压力均衡装置及峰值油压的确定方法
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摘要
PURPOSE:To prevent the damage and oil leak of pressure equalizing hydraulic cylinders and to prolong a plunger life by increasing the total quantity of the oil to be sealed in the pressure equalizing device of die cushion pins. CONSTITUTION:The plural die cushion pins are provided in the bolster of a press; simultaneously, the pressure equalizing hydraulic cylinders supported by the die cushion are provided in each lower part of the die cushion pins; and in the pressure equalizing device for the die cushion pins for which the above provisions are mutually connected in order to seal in a prescribed hydraulic pressure, the total oil quantity to be sealed in the device is increased. Consequently, a shock applied to the unused hydraulic cylinders is made small, the first peak pressure is thereby made small, and the life of the pressure equalizing hydraulic cylinders are prolonged.
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