What should the counterder hydraulic system meet?

release time:

2022-09-26 13:29

source:

The hydraulic system with closed-loop feedback control is usually used for the welding machine to control the matching of welding current, displacement, top forging force and welding time to ensure the welding quality.

butt-welder

The control sensor can generally choose piezoelectric crystal, string connected at the inlet of the oil cylinder, the measured pressure difference is sent to the service valve for correction. The sensor that controls the pre-heat, the flash amount and the top forging amount, generally chooses the potentiometer or the differential transformer. The linearity of the point potential difference meter is better than the difference transformer, and the different current intensity of each program can also be used to feedback control each program.

In the process of preheating, the hydraulic system should be able to control the welding parts contact pressure and open distance, the top forging is determined by welding heating and pressure mechanism top forging time and forging force to top, if fails to reach the specified top forging retention, that the system of top forging force or improper heat selection, in addition, still need to pay attention to the following matters:

1. The frame rigidity of the welding machine should be considered according to the maximum top forging force, because the deformation will affect the welding quality, and even make the weld crack.

2. Increase the top forging force and increase the cylinder inlet and outlet aperture, to reduce the time required to reach the rated top forging amount, and control the top speed.

3. Non-magnetic materials should be used due to magnetization problems.

4. There should be no magnetic materials in the welding circuit of the welding machine, especially the movement mechanism part should not affect the movement accuracy due to magnetization.

5. The insulation material of the welding circuit part should not be too thick, because when the clamp force and the top forging force is released, the elastic deformation of the insulation plate will also affect the welding quality.

Technical scheme of hydraulic drive system of large tonnage inertial friction welder

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