Four-column
hydraulic press is a kind of mechanical equipment that uses the static pressure of hydraulic oil delivered by oil pump to process metal, plastic, rubber, wood, powder and other products. It is commonly used in pressing process and press forming process, such as: forging, stamping, cold extrusion, straightening, bending, flanging, sheet drawing, powder metallurgy, pressing and so on.
When the four-column
hydraulic press is working, there is a fault that the lifting plate does not rise or the pressure drops significantly when the pressure is maintained. The reasons and maintenance methods are as follows: The lifting plate does not rise during work or the pressure drops significantly when the pressure is maintained. The pressure is unstable or the crawling phenomenon occurs.
The four-column hydraulic press consists of two parts:
Main engine part: The top frame is connected by four uprights, and the oil cylinder is mounted on the cylinder cap. The sliding beam is installed on the top of the machine and the worktable is connected by a plunger, guided by the column, and moves up and down together with the plunger. The parallelism of the sliding beam and the worktable is adjusted by the four nuts under the cylinder cap.
Hydraulic pump station part: The whole hydraulic control system consists of high-pressure pump and control components, which are installed on the oil tank and the bottom plate. The hydraulic pump station is installed above the main engine, and the high-pressure oil pipe is connected with the main cylinder and the lower top cylinder. The actual working pressure of the press can be adjusted by adjusting the remote pressure regulating valve to change the value of the pressure gauge. When adjusting, the handle should be slowly turned to prevent damage to the pressure system components.
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