Servo hydraulic press is one of the most widely used equipment in the production of product molding, since the advent of the 19th century, the servo hydraulic press has developed rapidly in the wide adaptability of the work, so that it has been widely used in various departments of the national economy. Because the hydraulic system and the whole machine structure of the servo hydraulic press have been relatively mature, the development of the servo hydraulic press at home and abroad is not only reflected in the control system, but also mainly manifested in high speed, high efficiency and low energy consumption; Electromechanical hydraulic integration, in order to make full and reasonable use of mechanical and electronic advanced technology to promote the improvement of the entire hydraulic system; Automatic, intelligent, to achieve automatic diagnosis and adjustment of the system, with fault preprocessing function; Hydraulic components are integrated and standardized to effectively prevent leakage and pollution.
As the main engine and hydraulic system of the two major components of the servo hydraulic press, due to the maturity of technology development, there is no big gap between domestic and foreign models, the main difference is in the processing technology and installation. Good process makes the machine in filtration, cooling and protection from shock and vibration, there is a significant improvement. In the oil circuit structure design, domestic and foreign servo hydraulic presses tend to be integrated, closed design, cartridge valve, superimposed valve and composite components and systems in the hydraulic system has been more widely used. In particular, integrated blocks can be professionally produced, with good quality, reliable performance and short design cycle. In recent years, the circuit composed of new hydraulic components developed on the basis of the integrated block also has its unique advantages, it does not need another connector, its structure is more compact, the volume is relatively smaller, and the weight is lighter without pipe connection, thus eliminating the leakage, vibration and noise caused by tubing and joints. The logic cartridge valve has the characteristics of small size, light weight, good sealing performance, small power loss, fast action speed and easy integration, which began to appear in the early 1970s and has been developed rapidly.
In this way, the automatic production level of the manufacturer is not high, resulting in the consistency of the product is difficult to ensure. The quality of raw materials used in the production of hydraulic products in China is also more obvious than that in advanced countries. For example, cylinder parts, seals, etc. The quality of these original devices themselves determines the service life of the servo hydraulic press, and its rigidity, heat resistance and strength of the body are key factors to ensure the quality of the servo hydraulic press. In addition, China's core technology of numerical control hydraulic seal independent development ability is insufficient, the lack of innovation with independent intellectual property rights, which is also an important factor hindering the development of China's hydraulic industry.
