During the operation of a four-column hydraulic press, pressure adjustment is a core link that concerns the performance of the equipment and production safety. The adjustment process has strict requirements and standardized procedures, and the specific key points are as follows:
The primary principle is that the pressure of the hydraulic system must never exceed the rated pressure of the pump, unless it is a special hydraulic press equipped with a pressure boosting device. It must be clearly understood here that the actual pressure of the pump is not directly set by humans but is automatically formed according to the magnitude of the load, which is a basic characteristic of the operation of the hydraulic system. The specified pressure of a four-column hydraulic press is the standard pressure value for the equipment to maintain normal operation.
When carrying out pressure adjustment, the first step is to lower the pressure of the relief valve. Immediately afterwards, switch the throttle valve and the directional valve to the neutral position to close the outlet of the pump and block the flow path of the hydraulic oil. Subsequently, by gradually and finely adjusting the relief valve, the pressure at the pump outlet will steadily increase. During this process, the operator should closely monitor the changes in the pressure value until the target pressure that meets the production requirements is reached. The entire adjustment process needs to be strictly controlled. Any negligence in any link may lead to abnormal pressure, which in turn will affect the processing quality of workpieces and may even cause equipment failures and potential safety hazards.
