Precautions for oil used in hydraulic system of die casting machine

The hydraulic system is the heart of the cold chamber die casting machine, and the hydraulic oil is the blood of the die casting machine. What problems should be paid attention to when using the hydraulic oil in the hydraulic system of the die casting machine? From two aspects: the first is the selection of hydraulic oil, and the second is the precautions for the use of hydraulic oil.

1、 Selection of hydraulic oil:

For the die-casting machine, the quality of hydraulic oil directly affects the service life of the die-casting oil valve. The damage of any oil valve will affect the normal operation of the machine. If the oil selected at the beginning is inappropriate, the harm to the machine has already occurred, but it is not easy to find. In this way, it will be difficult to repair in the future. Therefore, the selection of hydraulic oil with appropriate variety and viscosity is the primary condition to ensure the normal operation of the system of automatic high precision die casting machine.

1. Selection of hydraulic oil varieties

The variety selection of hydraulic oil is determined by the working environment and working conditions of hydraulic equipment. There are many kinds of hydraulic oil, including anti-wear hydraulic oil, anti combustion hydraulic oil, low pour point hydraulic oil, etc. Generally speaking, anti-wear hydraulic oil should be selected for the hydraulic system of aluminium alloy die casting machine. It is developed from anti rust and anti oxygen hydraulic oil. It not only has good anti rust and anti-oxidation, but also has more outstanding anti-wear performance and longer service life.

2. Selection of hydraulic oil viscosity

When selecting hydraulic oil, it is important to select the appropriate viscosity grade. Temperature is the main reason affecting the viscosity of hydraulic oil. If the viscosity is too low, it will cause leakage and increase wear, resulting in the pressure of hydraulic system not meeting the standard, and the product quality does not meet the requirements. If the viscosity is too high, it will increase the suction resistance of the pump, easily produce cavitation, cause vibration and noise, reduce the response performance of the hydraulic system and reduce the action sensitivity. Generally, No. 46 hydraulic oil shall be selected in winter and No. 68 hydraulic oil shall be selected in summer.

3. Comprehensive technical and economic analysis of oil separation

In the use of hydraulic oil, economy is an indispensable and important part. People often only pay attention to the price of oil products, ignoring the variety and quality of the selected oil. It is understood that the improper selection of oil products in the operation failure of hydraulic system is an important aspect. Therefore, in order to prolong the service life of oil products, save equipment maintenance costs, prolong the service life of hydraulic components and improve operation efficiency, high-quality suitable hydraulic oil can be used. Because high-quality hydraulic oil has very good air release, it is easy to produce bubbles during equipment operation, and it can quickly release small bubbles dissolved in oil, The products produced are more perfect, and its cleanliness and dispersion are also very good. After a period of time, there will be no oil stain on the machine wall, which not only reduces the wear of the machine, but also prolongs the oil change cycle.

2、 Precautions for use of hydraulic oil:

According to statistics, more than 70% of the faults of the hydraulic system of energy saving die casting machine are caused by improper use. Therefore, to ensure the normal and reliable operation of the hydraulic system, we should not only correctly and reasonably select the hydraulic oil, but also correctly use and manage the hydraulic oil. During use, pay attention to prevent the hydraulic oil from being polluted and replace the hydraulic oil in time.

1. Keep the hydraulic system clean

The residual iron filings, metal powder and other impurities during the processing and installation of hydraulic components, if not cleaned in time, will be brought into the oil and flow with the oil.