5mn双动拉伸液压机的活动横梁分为两部分，一为拉伸动梁，由拉伸工作缸的活塞驱动；另一为压边梁，由于分布于拉伸动梁四角的四个压边缸的柱塞驱动，两者可以作相对运动。其液压控制系统原理图如图4-11所示，电磁铁动作顺序表如表4-3所示，系统采用逻辑插装阀控制
The action of hydraulic control is described as follows
1. The moving beam fast lowering electromagnets 1ya, 5ya, 8ya and 9ya are energized, and the cartridge valve 9ya is closed,Hydraulic pumpFrom the unloading state to the pressure building state, the cartridge valve 2v is opened, and the oil in the lower chamber of the stretching cylinder can be discharged back to the oil tank. At the same time, the cartridge valve 3v is closed and 4v is opened, and the pressure oil can enter the stretching rigid upper cavity through the hydraulic control one-way valve 5. As the electromagnetic reversing valve 9 is changed to the left position, the pressure oil enters the control chamber of the filling valve 1, so that the flushing valve 1 is opened, and the oil in the flushing tank can smoothly flow into the upper chamber of the stretching cylinder. When the stretching two and the pressure beam drop rapidly together, the upper chamber of the stretching cylinder can be replenished with oil in time to reduce the subsequent pressure building time.
2. Slow drop of movable beam
3. Pressurization
4. Pressure maintaining
5. Pressure relief
6. Return
7. Stop
8. Erect and return of the ejector cylinder
The 5mn double-acting stretching hydraulic press has two operation modes. Manual operation is controlled by buttons, and semi-automatic operation is controlled by travel switch, electric contact pressure gauge, pressure relay and time relay respectively as follows
1. Travel switch 2xk controls the movable beam from fast downward to slow downward.
2. Travel switch 3xk controls the movable beam from slow downward to pressurized
3. Travel switch 4xk or electric contact pressure gauge dj control is changed from pressurization to pressure maintenance
4. Time relay 3sj control from pressure holding to pressure relief
5. Pressure relay yj controls pressure relief to return
6. Travel switch 1xk control or stop
GEO-CANARY-86EA1707