Features and maintenance guidelines of 300ton 400ton 500ton four-column hydraulic press machine
Four-column hydraulic press machine is a kind of mechanical equipment that uses the static pressure of oil pump to transport hydraulic oil 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. Its principle is to use Pascal’s law to make use of liquid pressure transmission machinery, there are many varieties. Of course, the uses are also varied according to needs. For example, according to the type of liquid that transmits pressure, there are two types of hydraulic press machine and hydraulic press machine.
The four-column hydraulic press machine has an independent power organization and electrical system, and centralized control by buttons can realize three working modes: adjustment, manual and semi-automatic: the working pressure of the machine, the pressing speed, the stroke and scale of the no-load fast descending and deceleration, all can be based on The process requirements can be adjusted, and the ejection process can be completed. Three process methods, the ejection process and the stretching process, can be used. Each process has two types of process actions: constant pressure and fixed stroke. The constant pressure molding process is after pressing. With ejection delay and automatic return.
The four-column hydraulic press machine adopts a relatively independent power mechanism and electrical system to a certain extent, and selects the button for centralized control during operation, which can realize the adjustment and semi-automatic operation methods. Its mobile work table is driven by a frequency conversion controller, and its electrical selection is a better PLC programmable controller. Through the innovation of the YH25-315D “T”-shaped mobile workbench, it is beneficial to improve the automation level of this series of hydraulic press machine, improve the production efficiency, and reduce the labor intensity of operators. Use liquid as the medium to transmit energy, use the hydraulic circuit of the sub-cylinder, the oil temperature is low, the idle stroke speed is above 10MM/sec, the working speed is below 20MM/sec, the equipment is in standby, and the noise when sliding up and down does not exceed 75 decibels, using a four-column three-plate structure, the vertical accuracy of the movable plate is controlled by four precision guide bushes, and the parallel accuracy of any point between the lower working surface and the upper working surface is below 0.08MM.
Daily use and maintenance guidelines for hydraulic press machine
Maintenance guidelines for hydraulic press machine
- Carry out smooth maintenance according to the smooth requirements of the machine.
- After each year of operation of the hydraulic press machine, the hydraulic oil should be released from the oil tank of the bed to clean the oil tank, and the filtered hydraulic oil should be refilled. The amount of oil should be confirmed at 3/4 of the height of the oil mark.
- The oil filter net on the oil suction pipe must be cleaned or washed regularly.
- Regularly check whether the handle, knob and button are damaged.
- The motor must be kept clean, and the mesh cover of the air inlet of the motor must always be kept in a good ventilation state and must not be blocked.
- 10 minutes before leaving get off work every day, refuel the hydraulic press machineto smooth and wipe the machine tool.
- It is forbidden for non-operators to operate the equipment, and it is usually necessary to stop the machine when people leave the machine.
Where hydraulic press machine are prone to failure
Oil pump: The plunger, sliding shoe, and return disc are worn, and the internal leakage is serious, resulting in a low system pressure rise. Control valve group: The control valve is the main component of the system pressure, and it will definitely affect the system pressure when something goes wrong. Such as spring deformation, poppet valve wear, valve stuck and so on. Oil cylinder: The oil cylinder is the performance element of the hydraulic press machine. If the seal in the oil cylinder is damaged, there will be internal leakage or the pressure of the series cavity system will not be high, which will seriously cause the oil cylinder to be damaged and unable to work.
Filling valve: The filling valve leaks, the oil in the upper chamber of the master cylinder flows back to the filling tank, and the upper chamber of the master cylinder cannot build pressure.
In view of the operating principle of the hydraulic press machine and the parts that are prone to failure, it is recommended to use a special hydraulic oil filtration and purification equipment to regularly filter and purify the smooth hydraulic oil of the hydraulic press machine to ensure the normal smoothness of the hydraulic press machine. The frequency of equipment failures and the effect of extending the service life of hydraulic press machine.
