Plasma arc cutting machine is a plasma cutting technology with the help of metal materials processing machinery, its use is divided into manual and automatic two kinds, the following to teach you how to use the plasma cutting machine:
1, manual non-contact cutting
(1) the torch roller contact workpiece, the nozzle away from the plane of the workpiece between distance Adjust the distance between the nozzle and the plane of the workpiece to 3 ~ 5mm. (The host cuts the "cut thickness selection" switch to high-grade).
(2) Turn on the torch switch, ignite the plasma arc, cut through the workpiece, moving in the direction of cutting at the same speed, cutting speed to cut through the premise, should be fast rather than slow. Too slow will affect the quality of the cut, or even break the arc.
(3) cutting is complete, turn off the torch switch, the plasma arc is extinguished, at this time, the compressed air delayed spray to cool the torch. After a few seconds, automatically stop spraying. Remove the torch to complete the cutting process.
2, manual contact cutting
(1) "Cutting thickness selection" switch to the low gear, a single machine to cut the thinner plate used.
(2) Place the torch nozzle at the starting point of the workpiece to be cut, turn on the torch switch, ignite the plasma arc and cut through the workpiece, and then move along the direction of the cut seam at the same speed.
(3) cutting is completed, open and close the torch switch, at this time, the compressed air is still spraying, a few seconds later, automatically stop spraying. Remove the torch to complete the cutting process.
3, automatic cutting
(1) Automatic cutting is mainly used for cutting thicker workpieces. Select the switch position of "cutting thickness selection".
(2) After removing the torch roller, the torch is firmly connected with the semi-automatic cutting machine, and the coupling is provided in the random accessory.
(3) connected to the semi-automatic cutting machine power supply, according to the shape of the workpiece, the installation of the guide rail or radius rod (if the guide rail for straight-line cutting, if the cutting circle or arc, you should choose the radius rod).
(4) If the torch switch plug is dialed down, replace the remote control switch plug (available in the random accessory).
(5) According to the thickness of the workpiece, adjust the appropriate travel speed. And will be semi-automatic cutting machine on the "reverse", "down" switch in the cutting direction.
(6) Adjust the distance between the nozzle and the workpiece to 3~8mm, and adjust the center of the nozzle to the starting strip of the workpiece cutting seam.
(7) Turn on the remote control switch, cut through the workpiece, turn on the semi-automatic cutting machine power switch to cut. In the initial stage of cutting, should always pay attention to the situation of the cutting seam, adjust to the appropriate cutting speed. And always pay attention to whether the two machines work normally.
(8) cutting is complete, turn off the remote control switch and semi-automatic cutting machine power switch, complete the cutting process.
Second, the use of plasma cutting machine, what are the precautions
Plasma cutting machine is a cutting speed and high efficiency of the new cutting machine, the use of a lot of things need to pay attention to, including:
1, the use of the pre-cutting and the precautions
(1) before use, you should check and confirm the power supply, gas, water, ensure that there is no leakage of electricity, Leakage of gas, water, grounding or zero-connection is safe and reliable; trolley, workpiece should be placed in the appropriate position, and should make the workpiece and the cutting circuit positively connected, and there should be a slag pit under the cutting work surface.
(2) should be selected according to the workpiece material, type and thickness of the nozzle aperture, adjust the cutting power supply, gas flow and electrode shrinkage.
(3) The automatic cutting trolley should be run by the empty car, and select the appropriate cutting speed.
(4) The operator must wear a protective mask, welding gloves, hat, filter film dust mask and soundproof ear muffs. Personnel not wearing protective goggles are strictly prohibited from directly observing the plasma arc, bare skin is strictly prohibited from approaching the plasma arc.
(5) cutting, the operator should stand in the upwind operation. Can be drawn from the lower part of the table, and it is desirable to reduce the open area of the operating table.
(6) when cutting, when the no-load voltage is too high, should check the electrical grounding, zeroing and torch handle insulation, should be insulated from the table and the ground, or in the electrical control system to install the no-load disconnect disconnector.
(7) The high frequency generator should be equipped with shielding shroud, and the high frequency circuit should be cut off immediately after arcing with high frequency.
2, cutting operation and with personnel protection precautions
(1) the site of the plasma cutting machine, should be equipped with rain, moisture, sun machine shed, and should be equipped with appropriate fire fighting equipment.
(2) high-altitude cutting, you must fasten the safety belt, cut and cut around and below the fire prevention measures should be taken, and there should be a person to monitor.
(3) when the need to cut pressurized containers, sealed containers, oil drums, pipelines, workpieces stained with flammable gases and solutions, should be eliminated to eliminate the pressure of containers and pipelines, to eliminate the flammable gases and solutions, and then rinse the poisonous, hazardous and flammable substances; there are residual oil and grease containers should be rinsed with steam, alkaline water and open the cover mouth to confirm that the containers are cleaned, and then filled with fresh water before cutting. Cutting. Measures should be taken to prevent electric shock, poisoning and asphyxiation when welding and cutting in containers. Cutting and sealing the container should be left out of the air holes, if necessary, in the air inlet and outlet at the installation of ventilation equipment; container lighting voltage shall not exceed 12V, the welder and the workpiece should be insulated; the container should be set up outside the person to monitor.
(4) is strictly prohibited in the container has been sprayed with paint and plastic cutting.
(5) the pressure state of the pressure vessel and pipeline, charged equipment, bearing structure of the stressed parts and containers containing flammable and explosive substances is strictly prohibited to cut.
(6) rainy days shall not be in the open air welding and cutting. When working in the wet area, the operator should stand in the place where the insulated items are laid, and should wear insulated shoes.
(7) After the operation, the power supply should be cut off in time, shut off the gas source and water source.