The method of clearing melt tumor after cutting of plasma cnc cutter
Plasma cutting arc in the material cutting surface because of the cutting process parameters set different formation width, depth and shape of irregular notches, the uniform cutting surface produce interruptions, at the same time in the cutting surface of the lower edge of the formation of hanging slag, the composition of the main iron oxide. This is a plasma arc incision melt tumor problem.
When cutting copper, aluminum and its alloys, the bottom of the incision is not easy to recombine with the molten metal due to its good thermal conductivity. These molten tumors are "hanging" under the incision, but are easy to remove. We take stainless steel as an example, because of the poor fluidity of stainless steel melting metal, it is not easy to blow all the molten metal out of the incision during the cutting process. Stainless steel thermal conductivity is poor, the bottom of the incision is easy to overheat, so that the incision remains with the melting metal that has not been blown out, and the lower part of the incision melting synthesis, cooling solidification after the formation of so-called molten tumor or hanging slag. Stainless steel toughness is good, these melt tumors are very tough, not easy to remove, to mechanical processing brings great difficulties. Therefore, the removal of stainless steel plasma arc cutting of molten tumor is a more critical issue.
MeisarCNC plasma cnc cutting
The specific measures for removing the melt ingress are as follows when using the plasma arc cutting process:
1. Choose the right gas flow and cutting speed. The gas flow is too small blowing force is not enough, easy to produce a molten tumor. When other conditions remain the same, as the gas flow increases, the incision quality is improved, and the incision without a melt tumor can be obtained. However, the excessive gas flow causes the plasma arc to become shorter, so that the plasma arc to the lower part of the melting capacity of the poor, after cutting the amount of drag increased, the incision is V-shaped, but easy to form a melttumor.
The quality of the incision is mainly assessed by the width of the incision, the verticalness of the incision, the roughness of the incision surface, the depth of the cut, the melt at the bottom of the incision and the hardness and width of the heat influence area of the incision. The surface mass of the plasma arc incision is between oxygen-acetylene cutting and band saw cutting, when the thickness of the plate is more than 100mm, due to the lower cutting speed to melt more metal, often forming rough incision.
The standard of good incision is: its width should be narrow, the cut cross-section is rectangular, the cut surface is clean, no slag or hanging slag, the hardness of the incision surface should not hinder the machining after the cut.
2. To ensure the concentricity of the electrode and nozzle. The pair ingendbetween electrode and nozzle, will lead to the gas and arc symmetry is destroyed, so that the plasma arc can not be well compressed or produce arc partial blow, cutting capacity decreased, incision asymmetry, causing the increase of melttumor, serious cause dingiarc, so that the cutting process can not be smooth.
3. To ensure that the plasma arc has sufficient power. Plasma arc power increase, that is, plasma arc energy increased, arc column elongation, so that the temperature of the melting metal in the cutting process increases and the flow is good, at this time under the action of high-speed air current blowing force, the melting metal is easy to be blown off. Increasing the arc column power increases the cutting speed and the stability of the cutting process, making it possible to use a larger air flow to enhance the blowing force of the air flow, which is very beneficial to eliminate incision melt.
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After repeated tests, the company successfully developed a square tube numerical control plasma cutting machine, with the special square tube numerical control system and special software, can be three-dimensional simulation operation, more intuitive, both convenient and fast, but also accurate and practical, after years of unremitting efforts, Meisar CNC products have been exported to domestic and foreign, focus on serving the needs of welding cutting equipment enterprises and individuals, professional tailor-made cnc cutting machine for users. In the export of CNC cutting machine with Asia, Africa, Europe and the United States and other multinational trading partners to establish a good cooperative relationship to promote the development and sales of foreign cutting machine market! The road is long, the spirit of "little is big, honesty-based" spirit of enterprise, to "leading technology, excellent quality, reasonable price" for the development of purposes, through the normative development to "strengthen customer service" as the goal, further enhance the competitiveness of enterprises and sustainable development of the ability to build CNC high-quality cutting equipment and unremitting pursuit.
