How to crimping hydraulic hose and fitting?

The sealing of the connection between the hose and the fitting is critical. If it is not properly crimping it can lead to leaks.Hydraulic leaks can result in injury to personnel or damage from machine downtime.This article will talk about the crimping steps to help you avoid mistakes.

One, Preparation:

1. Before crimping the fittings, first determine the material of the hose, the inner diameter of the hose, the number of layers of steel wire of the hose, the length of the hose, the type and size of the fitting and ferrule.?

2. According to the number of layers of hose steel wire to determine the corresponding ferrule (generally low-pressure oil hose selected a layer of ferrule, two layers of steel wire selected two layers of ferrule, four layers of steel wire selected four layers of ferrule, and so on).?

3. After the above data are determined, you can cut the hose according to the required length, and select the corresponding specifications of hose fittings and the number.?

4. After the completion of the cutting of the hose to strip the rubber, a large number of supporting production is recommended to use a more efficient stripping machine. The stripping length is about 4/5 of the sleeve length, and the standard of stripping is until the steel wire inside the hose is exposed. The purpose of peeling rubber is to make the sleeve easier to set into the hose, and the slot in the joint sleeve is better pressed into the steel tube wire to achieve the purpose of a solid fitting connection.?

Two: The crimping process:

1. According to the specifications of the hose selected and replaced with the appropriate mold, turn on the power of the hose crimping machine ready to start the crimping work.?

2. The sleeve and fitting pre-assembly is one of the most important aspects of the crimping process, which directly affects the sealing of crimp pipe fittings. Users in the press tube production is carried out, the sleeve into the hose, the core of the fitting inserted into the hose top, the sleeve adjusted to the core slot. If the sleeve is too inward, the outer wall of the sleeve seal will be pressed into the slot causing a poor seal, while the sleeve is too outward, it will be pressed directly into the fitting or the fitting will be broken.?

3. Put the adjusted fitting into the crimping machine and start the crimping key on the machine to do the crimping work. If it is an automatic crimping machine, the machine will stop automatically after the crimping work is finished, and the mold will open automatically, so the hose can be taken out for the next hose crimping work. If it is a manual operation crimping press, the operator needs to constantly observe the degree of contraction of the sleeve of the crimping fitting, generally the sleeve is tightly wrapped around the outer rubber of the hose, and the place where the contact between the sleeve and the outer rubber of the hose is bent by hand will not appear a gap as appropriate.

Three, check the hose assembly:

1. After the hose crimping is completed, the outside of the hose fitting should be observed, the fitting is tightly wrapped around the outer rubber of the hose, and there will be no gap between the contact of the ferrule and the outer rubber of the hose when bent by hand, and the inner core of the fitting will not be seriously deformed.?

2. With a thin steel wire or rod into the fitting core gently around the inner core wall test friction, the core wall around the smooth and smooth, indicating that the fitting crimping qualified. If there is a feeling of fracture around the core wall, it means that the core of the fitting may be fractured due to excessive crimping pressure, and the hose will be oozing oil or bulging in the process of future use. There is also a situation that the crimping pressure is too strong to cause the inner core to break directly, which is the inner core will be directly crimping, with steel wire or rod can not reach in, the hose for the scrap.

Are these methods helpful to you? Look forward to your comments and discussions.

Topa can supply not only hydraulic fittings and hoses. We can also supply hose crimping machines, skiving machines, etc. Our one-stop service has been recognized by many customers. If you need any help, please contact us.

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