How to Design the cnc plasma cutting machine steel Running Speed?

CNC plasma cutting machine steel enable the quick cutting of any electrically-conductive material. We can help you identify the best CNC plasma cutter for your needs, based on your job requirements and material thickness. 

Plasma cutting is a processing method that uses the heat of a high-temperature plasma arc to partially or partially melt (and evaporate) the metal at the workpiece kerf, and uses the momentum of the high-speed plasma to remove the molten metal to form the kerf.

How to design the running speed of plasma cutting machine According to the design specification, the upper limit of plasma cutting operation speed is 3500mm/min, which is the actual running cutting speed of index-controlled cutting machine. In fact, many manufacturers will run at no load when introducing products to users. Speed is the main, the speed can reach 7000mm / min or more. But in any case, such a large speed range is relatively difficult for the user to grasp. How to design the running speed of different thickness materials for different materials when cutting? The following Plasma Welding Machine Suppliers will answer your questions.

There are many factors affecting the quality of plasma cutting, such as the no-load voltage and arc column voltage, the cutting current, the electrode shrinkage, the cutting height and other plasma arc cutting process parameters, which will directly affect the stability of the cutting process, cutting Quality and effectiveness. In general, factors such as no-load voltage and arc column voltage, cutting current magnitude, electrode shrinkage, and cutting nozzle height directly affect the compression effect of the plasma arc, that is, the temperature and energy density of the plasma arc, while the plasma arc High temperature and high energy determine the cutting speed, so it can be said that many of the above factors are essentially related to the cutting speed. As a CNC cutting device, the cutting speed should be increased as much as possible while ensuring the cutting quality. This not only increases productivity, but also reduces the amount of deformation of the cut parts and the heat affected area of the slotted area. If the cutting speed is not suitable, the effect is reversed, and the sticking slag is increased, and the cutting quality is lowered.

Plasma Cutting Torch

At present, the Gas Cutting Machine is divided into several types according to the different cutting aid gas. The cutting speed specifications of different auxiliary cutting gases are also different. Take the air plasma arc cutting as an example. When cutting the carbon steel plate, the cutting current of 230A is taken as the standard, 6mm. The cutting speed of the thickness carbon steel plate can reach 3300mm/min, and when the thickness is adjusted to 40mm, the cutting speed is limited to 500mm/min to ensure the cutting effect and quality. If you switch to other auxiliary cutting gas, such as cutting with pure oxygen, the cutting speed is reduced more. At the same cutting current of 230A, although the pure oxygen plasma cutting of 6mm thickness carbon steel can be increased to 3700mm/min, the cutting of 40mm carbon steel plate is cut. The speed is only 350mm/min.

Advantages of NC plasma cutting machine

1.Better cutting quality

Scum, heat affected zone, top fillet and cutting angle are the main factors affecting the cutting quality.

Especially in scum and heat affected zone, plasma cutting is much better than flame cutting. There is no residual scum on the edge of plasma cutting, and the heat affected zone is much smaller.

2.Scum

Plasma process uses high temperature charged gas to melt metal and blow the melted metal material off the cutting surface.

Flame cutting is to use the chemical reaction between oxygen and steel for cutting, which will produce iron red slag or scum.

Because of the difference of this technology, the scum produced by plasma cutting is less, and the attached scum is easier to remove. These scum can be easily knocked down without grinding or removing, greatly reducing the time required for secondary processing.

Fewer grinding operations lead to higher productivity.

3.Heat affected zone

Heat affected zone

The size of the heat affected zone (HAZ) is one of the important issues in metal cutting.

High temperature will change the chemical structure of the metal, making the heated edge dark (tempering color) and warping. If the heated edge is not removed, the workpiece may not be suitable for secondary welding.

No matter what process is adopted, the faster the torch moves, the smaller the heat affected zone will be.

Because of the rapid cutting characteristics of plasma, the heat affected zone is smaller, which shortens the time spent in the secondary processing to remove the heated edge.

Some flame cutting users may also pay attention to the fire color.

The heat affected zone cannot be seen from the outside, but the tempering color is not. It will change the color of the metal.

In the same way, the rapid cutting of plasma makes the area of fire color smaller.

4.Higher productivity

With CNC plasma cutting and piercing speeds up to 8.5 times faster than flame cutting, the productivity gains can be significant, not counting the time saved in preheating and secondary processing.

5.Lower cost per part

When analyzing costs, it is important to understand the difference between operating costs and operating costs per part or per meter.

So, how to determine the actual cost of cutting a part?

The running cost per meter is the total cost of cutting per hour divided by the total length (meters) that can be cut in one hour. The costs involved in cutting include vulnerable parts, electricity, gas, manpower and sustainability costs.

Cost per part is the total length of cutting required to produce a part multiplied by the cost per meter of operation.

The cutting speed of plasma system is faster, and the number of parts produced in a certain time is more, so the cutting cost of each part is much lower.

For hand-held cutting, calculating the cost of each job or task can better evaluate the cost savings.

The running cost per hour multiplied by the total time required to complete the job equals the cost of the job.

For flame cutting, the preheating time and long secondary processing time must be calculated in the required time.

6.Higher profitability

The lower cost per part of plasma system directly leads to the increase of profit.

Cutting every part can save money and thus increase profit margin.

The more parts are cut per hour, the more total profit will be increased.

7.Easier to use

For users who use flame cutting, it takes time to learn and practice to master the setting of flame chemical parameters and maintain the chemistry of flame.