How to use a plasma cutter ？

How to use plasma cutting machine?

Before use and when cutting

1.Check and confirm that the power supply, air source, and water source have no leakage, air leakage, or water leakage, and the grounding or zero connection is safe and reliable.

2.The trolley and workpiece should be placed in an appropriate position, and the workpiece should be connected to the positive electrode of the cutting circuit, and there should be a slag pit under the cutting working surface.

3.The nozzle aperture should be selected according to the material, type, and thickness of the workpiece, and the cutting power, gas flow, and electrode shrinkage should be adjusted.

4.The automatic cutting trolley should be run empty and the cutting speed should be selected.

5.Operators must wear protective masks, welding gloves, hats, filter dust masks, and soundproof earmuffs. Personnel who do not wear protective glasses are strictly prohibited from directly observing the plasma arc, and bare skin is strictly prohibited from approaching the plasma arc.

When cutting, the operator should stand upwind to operate. The air can be drawn from the lower part of the workbench, and the open area on the workbench should be reduced.

1. When cutting, when the no-load voltage is too high, check the electrical grounding, zero connection, and the insulation of the torch handle. The workbench should be insulated from the ground, or a no-load circuit breaker should be installed in the electrical control system.

2.The high-frequency generator should be equipped with a shielding cover, and the high-frequency circuit should be cut off immediately after the high-frequency arc is used.

3.The use of thorium and tungsten electrodes should meet the requirements of Article 12.7.8 of jgj33-2001.

Cutting operation and protection of cooperating personnel

1. The plasma cutting machine used on site should be equipped with rain, moisture, and sun sheds, and should be equipped with corresponding fire fighting equipment.

2. When cutting at high altitude, safety belts must be worn, fire prevention measures should be taken around and below the cutting, and a special person should be supervised.

1. When it is necessary to cut pressurized containers, sealed containers, oil drums, pipes, and workpieces stained with flammable gases and solutions, first eliminate the pressure in the containers and pipes, eliminate flammable gases and solutions, and then flush toxic, harmful and flammable Substances; for containers with residual grease, they should be rinsed with steam and alkaline water first, and the lid should be opened to confirm that the container is cleaned, and then filled with water before cutting. Welding in the container should be taken to prevent electric shock and poisoning. And suffocation measures. Air holes should be left in the sealed container, and equipment ventilation equipment should be installed at the inlet and outlet when necessary; the lighting voltage in the container should not exceed 12v, and the welder and the workpiece should be insulated; the special person should be placed outside the container. It is strictly prohibited. Cut inside a container that has been sprayed with paint and plastic.

2. It is strictly forbidden to cut pressure vessels and pipelines, live equipment, load-bearing structures, and containers containing flammable and explosive materials under pressure.

3. Welding and cutting are not allowed in the open air on rainy days. When working in a humid area, the operator should stand in a place with insulating materials and wear insulating shoes.

After the operation, the power should be cut off, and the air and water sources should be turned off.

The technology behind plasma cutting involves a thermal cutting process in which a beam of ionized gas, or plasma, heats an electrically conductive metal beyond its melting point, then blows away the melted material, leaving a hole or a cut. As a plasma torch is moved across material a cut is made, much like that of a saw blade. Plasma cutting can be done using a hand held torch, however a table mounted plasma cutter with a computer controlled gantry system can be used for a higher degree of accuracy for more complicated cutting operations.

Plasma Cutting System Applications

Plasma cutting systems allow simple or complex shapes to be cut into materials like common steels and aluminum. Any material that conduct electricity can be cut with a plasma torch. Some materials, such as those that create toxic fumes, can be cut with plasma cutting systems that incorporate venting, gas selection, and other special features. Advantages offered by plasma cutting systems include rapid, repetitive cutting with a high degree of accuracy. Plasma cutting replaces tedious, multi-step cutting and drilling processes, which improves efficiency by saving hours of layout work.

Types of Plasma Cutting Systems

CNC plasma cutting systems are typically divided into two types – standard and high definition. While both plasma cutting systems operate using the same technology, the high definition plasma cutters feature a different torch design and gas feed. The high-definition plasma cutters give 1-3 degrees of cut bevel, virtually no dross, and make oxide-free cuts on mild steel. The standard definition plasma gives 3-5 degrees of cut bevel, dross that will need to be cleaned prior to welding, and makes oxide-free cuts on only stainless and aluminum.