四柱液压机具有独立的动力机构和电气系统，采用按钮集中控制，可实现调整、手动及半自动三种工作方式:机器的工作压力、压制速度，空载快下行和减速的行程和范围，均可根据工艺需要进行调整，并能完成顶出工艺，可带顶出工艺、拉伸工艺三种工艺方式，每种工艺又为定压，定程两种工艺动作供选择，定压成型工艺在压制后具有顶出延时及自动回程。
How to deal with the working pressure that cannot be adjusted during operation? Let's look at the reason why the working pressure of the four-column hydraulic press cannot be adjusted:
1. Check whether the cartridge valve and the reversing valve are stuck
2. Check that the circuit failure is likely to be the main reason why the hydraulic pressure cannot rise under normal conditions. It is recommended to use a screwdriver to poke the small reversing valve to see if it is stuck, and then check whether the indicator light of the rising small valve is on,
3. The main relief valve in the system of the four-column hydraulic press is seriously worn, resulting in overflow and debris, so it will be stuck.
6. Whether the four-column hydraulic press system is balanced and the girder is stuck, of course, there are not many such problems.
7. The total flow rate of the pump is abnormal, such as the total flow rate of the pump is inversely proportional to the working pressure
8. See whether the working pressure of the hydraulic transmission system belongs to normal conditions
9. The direction valve of the lower chamber of the hydraulic transmission system is stuck, and the oil also enters the upper and lower chambers.
10. The valve core of the charging valve of the hydraulic transmission system is stuck, which is probably the cause of the debris or the spring fracture.
How to deal with the working pressure that cannot be adjusted during operation? Let's look at the reason why the working pressure of the four-column hydraulic press cannot be adjusted:
1. Check whether the cartridge valve and the reversing valve are stuck
2. Check that the circuit failure is likely to be the main reason why the hydraulic pressure cannot rise under normal conditions. It is recommended to use a screwdriver to poke the small reversing valve to see if it is stuck, and then check whether the indicator light of the rising small valve is on,
3. The main relief valve in the system of the four-column hydraulic press is seriously worn, resulting in overflow and debris, so it will be stuck.
4. The flushing valve on the upper part of the oil cylinder is not opened, so it cannot rise normally.
5. Check whether the cylinder is broken.6. Whether the four-column hydraulic press system is balanced and the girder is stuck, of course, there are not many such problems.
7. The total flow rate of the pump is abnormal, such as the total flow rate of the pump is inversely proportional to the working pressure
8. See whether the working pressure of the hydraulic transmission system belongs to normal conditions
9. The direction valve of the lower chamber of the hydraulic transmission system is stuck, and the oil also enters the upper and lower chambers.
10. The valve core of the charging valve of the hydraulic transmission system is stuck, which is probably the cause of the debris or the spring fracture.