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Several Factors Affecting The Effect Of Plasma Numerical Control Cutting Machine

Mar 30, 2018

Mechanical failure and other factors, enterprise users in the operation is not properly set up CNC plasma cutting machine cutting parameters will also affect the actual effect of various factors, the following will be the actual use of the experience effect of CNC plasma cutting effect of cutting machine, the majority of users and business communication:


1. cutting current increase cutting current can also improve plasma arc power, but it is the maximum allowable current limit, otherwise it will cause the decline of plasma arc column is thicker and the kerf width increases, the electrode life. 2. electrodes Suliang so-called Suliang refers to the electrode to the cut end of the mouth distance, the appropriate distance can make the arc get good compression in the cutting nozzle, get plasma arc energy concentration, high temperature and effectively cutting. If the distance is too large or too small, the electrode will be burned, the cutting nozzle is burned and the cutting ability is reduced. Suliang generally take 8-11mm. 3. no-load voltage and arc column voltage plasma cutting power supply must have high enough empty voltage to easily lead arc and make plasma arc steady combustion. The no-load voltage is generally 120-600V, and the arc column voltage is generally half of the no-load voltage. To increase the voltage of the arc column, the power of the plasma arc can be increased obviously, so the metal plate which can cut the cutting speed and cut more thickness can be improved. The arc column voltage by adjusting the gas flow and often increase the electrode setback did not reach, but the arc column voltage cannot exceed the no-load voltage of 65%, otherwise it will make plasma arc stability.

4., all factors above cutting speed directly affect the compression effect of plasma arc, that is, the temperature and energy density of plasma arc. The high and high energy of plasma arc determines the cutting speed, so all the above factors are related to cutting speed. On the premise of ensuring the cutting quality, the cutting speed should be improved as much as possible. This not only increase productivity, but also reduce the thermal effect of cut parts deformation and cutting area. If the cutting speed is not suitable, the effect is opposite, and the slags will be increased and the cutting quality will decrease. 5., increasing gas flow rate can not only increase the voltage of arc column, but also enhance the compression effect on the arc column, so that the plasma arc energy is more concentrated and the injection force is stronger. Therefore, the cutting speed and quality can be improved. However, the excessive flow of gas will shorten the arc column, increase the loss of heat and reduce the cutting ability, until the cutting process can not be carried out normally.

The height of the 6. cutting mouth height is the distance between the end of the cutting nozzle and the surface of the cut workpiece. The distance is generally 4~10mm. It is with electrodes Suliang within the same distance to the right, in order to give full play to plasma arc cutting efficiency, otherwise it will make the cutting efficiency and quality to drop or cut mouth burn.