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[CN 201910791542.8] Deep drawing hydraulic press with two-way variable pressing force and use method thereof
[CN 201910791542.8] a two-way variable pressing force drawing hydraulic press and its use method title: a two-way variable pressing force drawing hydraulic press and its use method application number: CN 201910791542.8 applicant: Foshan kangsida hydraulic machinery co., ltd. application date: 2019-8-26 patent type: invention application for a two-way variable pressing force drawing hydraulic press, including a main cylinder, a lower cylinder and a frame, the main cylinder is installed above the frame, the lower cylinder is installed under the frame. The oil circuit of the master cylinder is equipped with a master cylinder proportional relief valve, the oil circuit of the master cylinder is equipped with an independent compensation oil source, and the oil circuit of the lower cylinder is equipped with a lower cylinder proportional relief valve. The signal acquisition terminals of the master cylinder proportional relief valve, the independent compensation oil source and the lower cylinder proportional relief valve are all connected to the signal output terminal of the controller, the independent compensation oil source is used to realize the real-time and high-responsiveness effect of the master cylinder pressure compensation. The invention can realize the hydraulic pad deep-drawing process, the lower cylinder anti-top deep-drawing process mode and the corresponding continuous secondary deep-drawing process action on the same hydraulic press, and the corresponding each deep-drawing process mode can adjust the pressure edge force of the plate forming in real time according to the preset loading curve.
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