Views:0 Author:Site Editor Publish Time: 2021-04-16 Origin:Site
Since the automatic die casting machine works under high temperature, high pressure, and high speed, the working conditions are relatively harsh, and it will inevitably fail after working for a long time. Such as abnormal noise, unstable movement, even cold chamber die casting machine get stuck at a certain position, the cycle cannot continue, etc. Among them, the hydraulic system, as the core of the nonferrous metal die casting machine, is a relatively faulty component.
Here is the content list:
What is the cause of die casting machine hydraulic system failure?
How to repair failure of die casting machine hydraulic system?
How to do die casting machine hydraulic system daily maintenance?
The cause of the failure of the die casting machine is mainly the failure of the electrical part and the hydraulic system. Among them, failures caused by mechanical damage are easier to judge and eliminate.
The failure of the electrical part is often due to the failure of the motor relay of the die casting machine, or the coil insulation in the solenoid valve is burned, the contact of the contact element is burned, the fuse is blown, and the connection between the electrical circuit and the element is loose.
However, there are more reasons for the failure of the die casting machine hydraulic system, and the failures of the electrical parts and the hydraulic system are often mixed together. Therefore, careful observation, careful inspection and specific analysis are required to determine the cause of the failure.
The inspection method of die casting machine is like a doctor's treatment of a patient: view, listen, touch, smell and so on. These methods can be used to analyze the failure of the die casting machine, determine the symptoms and location of the failure, and the possible causes of the failure.
Die casting machine maintenance is a systematic and comprehensive judgment maintenance process, which must be learned from the proficient process. Maintenance personnel are required to be responsible and abide by the relevant maintenance manual.
Viewing is to see whether the movement is normal or not, and to distinguish whether it is an electrical, mechanical or hydraulic failure. Where is the pressure oil leaking, whether the pressure gauge reading is normal and there are scratch marks or not?
Listening is to listen carefully for normal sound when the die casting machine is working, whether there is a special strong noise or vibration, and whether there is oil leakage when it is still.
If the piston of the oil return cartridge valve in the injection part is stuck with foreign matter, use a flat-head or screwdriver to hold the valve cover, and when injecting, you can hear the sound of oil leakage by leaning your ear against the screwdriver handle.
Touching the die casting machine with hand is to judge whether the temperature is abnormal, the oil temperature, the electromagnet, and the temperature rise is too high.
When the equipment encounters electrical failure, nose can be to smell the electrical parts for burnt and other odors.
First of all, the operator should prevent the use of hydraulic oil that has deteriorated, thickened, and has deposits in die casting machine. When changing hydraulic oil, do not mix new and old hydraulic oil. Be sure to install the fuel tank cap after each oil change.
Then the hydraulic oil of the new die casting machine should be changed after 500 hours of operation, and every 2000 operating hours thereafter.
Every time the hydraulic oil is changed, the filter element should be cleaned up: remove the filter element, immerse it in clean diesel, clean it with a steel brush, and blow it clean with compressed air.
When disassembling any high-pressure parts of the die casting machine, such as hydraulic valves, oil pipes, the pressure oil must be discharged first.
Since there may be residual pressure inside, when loosening the screws, they should be loosened slowly, and the screws can be completely loosened after the residual pressure is removed.
In addition, the oil pipe joints, oil valve installation screws and other connecting parts should be checked at regular intervals. If they are loose, they must be tightened in time to prevent leakage or air from entering the hydraulic system of the die casting machine.
Whether it is in maintenance or daily maintenance, it should be noted that all the hydraulic system pressure, flow proportional valve, control board and relief valve safety pressure parameters involving automatic die casting machine are not allowed to be adjusted randomly. If you purchased a nonferrous metal die casting machine from Longhua Die Casting Machine Co., Ltd, you can consult us cold chamber die casting machine problems at any time for parameters adjustment for safety.