Pressure resistance of the press

The high-pressure hydraulic cylinder with high impact pressure of the press, if the pressure resistance performance is not good, it is easy to cause accidents such as deformation and damage of parts, so the pressure resistance test must be carried out. The pressure of the press pressure test is generally 1.25-1.5 times the nominal pressure. Higher requirements are only made in exceptional circumstances. The purpose of the pressure test is mainly to investigate the strength and connection strength of each part of the hydraulic cylinder, of which the most important is the strength of the cylinder barrel and the cylinder head, the connection strength of the cylinder head and the cylinder barrel, and the connection strength of the piston and the piston rod. In addition.. The pressure test can also check whether some castings will leak due to looseness, pores, and blisters, and whether there is oil leakage at the welded parts.

When the pressure test of the press is carried out, the piston is generally stopped at the two ends of the stroke of the hydraulic cylinder. If in order to check the connection strength between the piston rod and the piston, it is necessary to stop the piston 11 in the middle position and carry out the pressure test on the test section in the middle position.

Press high humidity performance

If the hydraulic cylinder of the press can still operate normally for a long time under high temperature conditions, the high temperature performance is good. The ability of a hydraulic cylinder to work under high temperature conditions is important for some hydraulic cylinders. For example, construction machinery exposed to the sun, and the manipulator next to the heating furnace, the working environment temperature is already very high, and the heat of the hydraulic system will cause the cat skin to drop and the leakage to increase. If the sealing material cannot meet the high temperature requirements, damage such as sticking will also occur. Generally, hydraulic cylinders can adapt to high humidity of about 90'C, and special requirements can be negotiated separately. This article is from the official website of WORLD Press Machine Machinery, www.pressmachine-world.com, please indicate the source!