JPS5881100U - Compressed air circuit for driving pneumatic hydraulic drive device for press slide knockout device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Fig. 1 is a pneumatic/i-pressure circuit diagram of a conventional pneumatic/hydraulic drive device for a slide knockout device, Fig. 2 is a pneumatic/hydraulic circuit diagram of a pneumatic/hydraulic drive device for a slide knockout device according to the present invention, and Fig. 3 is a vertical cross-sectional view of the booster cylinder, and Figure 4 is a vertical cross-sectional view of the main parts of the booster cylinder when the check valve is open.
FIG. 5 is a longitudinal sectional view of the main parts of the booster cylinder when the oil supply valve is open.

Claims (1)

[Claims for Utility Model Registration] 1. A piston 1 is installed in the input cylinder chamber 7 of the booster cylinder 5 that drives the slide knockout device 2 of the press 1.
1 is inserted so as to be movable back and forth, and the input cylinder chamber 7 is divided into a high pressure chamber 13 and a low pressure chamber 14 by the piston 11.
The high pressure chamber 13 is connected to the knockout pressure setting circuit 22 and the cushion pressure setting circuit 20 via the circuit switching valve 17 for switching the knockout pressure cushion, and the high pressure chamber 13 is connected to the knockout pressure setting circuit 22 and the cushion pressure setting circuit 20 so as to be switchable. A pressure reducing valve 18 for pressure setting is interposed, a knockout pressure setting circuit 22 is connected to the compressed air supply pipe 16, a cushion pressure setting relief valve 26 is provided in the cushion pressure setting circuit 20, and the circuit switching valve 17 is switched. Driving a pneumatic-hydraulic drive device for a slide knockout device of a press, characterized in that the internal pressure of the high pressure chamber 13 can be switched between a relatively high knockout pressure and a lower cushion pressure thereby. compressed air circuit. 2 Utility Model Registration In the compressed air circuit for driving the pneumatic-hydraulic drive device for a slide knockout device of a press as described in claim 1, the cushion pressure setting circuit 20 is connected to the compressed air supply pipe 16, and the relief valve 26 is connected to the compressed air supply pipe 16. A low pressure setting pressure reducing valve 24 for cushion pressure compensation is interposed between the compressed air supply pipe 16 and the gap. 3. In the compressed air circuit for driving the pneumatic-hydraulic drive device for a slide knockout device of a press as described in claim 2 of the utility model registration claim, the relief valve 26 is configured with an external pilot-operated relief valve, and the low pressure setting pressure reducing valve 24 The pilot port 26b of the relief valve 26 is connected to the pressure reducing outlet 25 of the
and the inlet 33a of the check valve 33 for differential pressure generation, and the cushion pressure setting circuit 21 which connects the outlet 33b of the check valve 33 for differential pressure generation and the high pressure inlet 26a of the relief valve 26.
Something that is equipped with. 4 Utility Model Registration In the compressed air circuit for driving the pneumatic-hydraulic drive device for a slide knockout device of a press as described in claim 3, the relief valve 26, the check valve 33 for generating a differential pressure, and the low pressure setting pressure reducing valve 24 An integral combination of