Forging plant: the standardization of hydraulic equipment forgings is the development trend of forging technology. The standardization of hydraulic equipment forgings is in a priority position in hydraulic components. Among the published hydraulic component standards, hydraulic cylinders account for a large proportion. The significance of standardization is well known. It is not only convenient for production management, design and manufacturing, but also conducive to technical exchange, organization of professional cooperation and product matching. If non-standard parameters are adopted, non-standard seals or other parts and forgings must be required, which not only causes difficulties in design and manufacturing, but also brings trouble to users in maintenance and spare parts.

Forging parts factory: in order to strengthen the standardization of hydraulic and pneumatic components and systems, the international organization for Standardization ISO established the technical committee of hydraulic and pneumatic systems and components in 1989, and the third group is responsible for formulating and reviewing the standards related to hydraulic cylinders and cylinders. China joined the organization in 1978. Since the 1970s, China has actively carried out the standardization of hydraulic equipment forgings. In addition to formulating national and ministerial standards for hydraulic cylinders, various industries also have the joint design of various series of hydraulic cylinders. Hydraulic cylinders also have different names such as "oil cylinder", "power cylinder" and "actuator", and sometimes broader names such as "hydraulic motor" and "actuator" are used. According to the current regulations, except that the Aerospace Department can be called "actuator", other occasions should be collectively referred to as hydraulic cylinder.

Forging plant: pay attention to specific concepts when using terms. For example, for the names of both ends of a single piston hydraulic cylinder, Japanese JIS stipulates that end a is the cylinder head, while USAS stipulates that end B is the cylinder head, so the reader should judge according to the actual situation. There are no specific provisions on both ends of the hydraulic cylinder in Chinese standards. For the convenience of description, this book stipulates that end a is the cylinder bottom and end B is the cylinder head. For double piston rod hydraulic cylinder, it is called upper and lower cylinder heads or left and right cylinder heads respectively, not the cylinder bottom. When the piston moves towards the cylinder head, it is called push out. At this time, the force is called thrust, and the moving speed is called push out speed. On the contrary, it is called pull in speed, pull in speed and pull in speed respectively.