Improvement of Hydraulic Control Circuit of Y-2000 Tension Hydraulic Press Master Cylinder

Improvement of the hydraulic control circuit of the 2000 main hydraulic cylinder of Changzhou University of Technology Changsha 4I.OOS3 Li Guang Tan Jianping Hu Junping 2000 stretching hydraulic press is a key equipment of a factory, its maximum working pressure is 20 cutting mainly to complete the drawing forming process of 812 steel plate. Jiji's production capacity and operational reliability play a key role in the overall production. The main cylinder of the hydraulic press is a single plunger cylinder, and the maximum working pressure of the plunger diameter of the master cylinder is 20 sen. The flow rate is 480. The main cylinder control circuit mainly completes the function of rapid descent, pressure holding and pressure relief, and the like. The hydraulic compressor mainly has a large reversing impact that does not meet the prescribed dwell time, and often the pressure relief is not complete during the designed pressure relief time, so that the reversing stroke has a great impact on the return line.

The main cylinder of the 2000 extension hydraulic press was screwed into the road and improved. Improved 6 hydraulic system principle multi-stage series drive main valve. In the inlet and outlet of the master cylinder. Use the neodymium reversing pilot valve, 戎 control the plug-in valve lsL6. Re-operation; Wi-plug valve (1) g25, adjust the orifice damping device of each channel, the main valve can be operated smoothly, reduce the system hydraulic pressure The impact of the direction; the electromagnetic reversing pilot valve uses a ball valve. The pressure drop caused by the valve unloading during the pressure keeping process is avoided; the control circuit has a self-locking function. The hydraulically controlled directional control valve is in the right position when the main cylinder is not fully relieved. The drain valve 150 is closed. Therefore, the amount of pressure + 会 will flow to the return line. It avoids the rushing of the rushing 1 such as 1 through the improved master cylinder control loop, which satisfies the requirements of the normal operation of the equipment.