Because different cutting power sources and cutting torches cut different metal plates and materials of different thicknesses, they all have the best technical parameters. Therefore, the cutting speed standard that is most suitable for equipment and workpieces, etc. must be determined. .
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Description for Food Processor 10 In 1
400W
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2 speeds with pulse
shink bag packing
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Cutting speed: The best cutting speed scale can be selected according to equipment selection or determined by experiment, because of the thickness of the data, raw materials are not the same, the melting point is high and low, the thermal conductivity is fine and the external tension after melting, etc., cutting speed is also corresponding Change. The primary performance:
1. Moderately improved cutting speed can improve the cutting quality, that is, the cutting is slightly narrowed, the cut surface is more flat, and the deformation can be reduced together.
2, the cutting speed is too fast so that the cutting line energy is lower than the required amount, the jet in the slit can not quickly blow the melted cutting melt to immediately form a large amount of rear drag, accompanied by cutting off the slag, cut off The appearance quality is reduced.
3. When the cutting speed is too low, because the cutting point is the anode of the plasma arc, in order to maintain the stability of the arc itself, the anode spot or anode area must find the conduction current locally near the nicks near the arc, together with the jet flow. Radiate more heat in the radial direction, so that the cutting becomes wider, and the information on both sides of the cutting is cut and solidified at the bottom edge to form a slag which is not easy to be finished, and the top edge is cut off due to excessive melting due to heating.
4. When the speed is extremely low, the arc will even subside because the cut is too wide. This shows that the outstanding cutting quality and cutting speed are inseparable.
According to the design standards, the upper limit of plasma cutting operation speed is 3500mm/min. This is the practical operating cutting speed of the exponentially controlled plasma cutting machine. In practice, when many manufacturers introduce products to users, they will mainly run at no-load speed. Can reach 7000mm/min or more, but in any case, such a large scale of speed, it seems relatively difficult for the user to grasp, for different raw materials, different thickness of the data when cutting design how to run speed.
There are many factors that affect the quality of plasma cutting. For example, various plasma arc cutting technology parameters such as no-load voltage and arc-column voltage, cutting current size, electrode inner shrinkage, cutting tip height, etc., will directly affect the stability of the cutting process and cutting. Quality and function. In general, the no-load voltage and arc-column voltage, the size of the cutting current, the electrode internal shrinkage, and the height of the cutting tip directly affect the contraction effect of the plasma arc, that is, the temperature and energy density that affect the plasma arc, and the plasma arc The high temperature and high energy rate determine the cutting speed, so it can be said that many of the above factors are essentially related to the cutting speed. As a numerical control cutting device, the cutting speed should be improved as much as possible while ensuring the cutting quality. This not only improves productivity, but also reduces the amount of deformation of the cut parts and the heat affected zone of the kerf area. If the cutting speed is not suitable, the effect is reversed, and the sticky slag is added and the cutting quality is reduced.
Currently, plasma cutting is divided into different types according to the cutting aid gas. Different standards of cutting gas cutting speed are also different. Taking the air plasma arc cutting as an example, when cutting a carbon steel plate, a cutting current of 230 A is used as a standard. 6mm thickness of carbon steel plate cutting speed can reach 3300mm/min is more suitable; and when the thickness is adjusted to 40mm, the cutting speed is limited to 500mm/min to ensure the cutting effect and quality. If the use of other auxiliary cutting gas, such as cutting with pure oxygen, cutting speed decreases more, at the same cutting current of 230A, despite the 6mm thickness of carbon steel plate, pure oxygen plasma cutting can be improved to 3700mm/min, but for 40mm carbon steel plate Cutting speed is only 350mm/min.
In general, because different cutting power sources and cutting torches have different best technical parameters when cutting different metal materials and different thickness materials, it is necessary to determine the most suitable based on the actual conditions of equipment and workpieces. Cutting speed standard.
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