What are the causes of burrs in laser cutting workpiece and how to solve them?

Burrs refer to irregular metal parts, such as sharp corners and rough edges, which occur at the transition point of the workpiece surface in laser cutting. Burr is one of the common phenomena in laser cutting machine processing. It is also the two major problems that have not been solved so far in the theoretical research of metal cutting, 'burr generation and control'. Burrs directly affect the dimensional accuracy, shape and position accuracy and surface roughness of the machined parts.

1. Causes of burrs in sheet metal processing by laser cutting machine:

The main reason of burr in laser cutting machine is that when laser cutting machine is working on the workpiece, the high energy produced by laser beam irradiation on the workpiece surface makes the workpiece surface vaporize rapidly and evaporate, so as to achieve the purpose of cutting. Titanium Hao Machinery is the company's main products, including rotary tip, screw, axis processing, CNC lathe processing, tool handle, tool rod, chuck connecting rod. But there is a core device here, which we must pay attention to, that is, auxiliary gas. Auxiliary gas is when the workpiece irradiation surface gasification, blowing off the slag on the workpiece surface, if not using auxiliary gas, slag cooling, will form burrs attached to the cutting surface. This is the main reason for burr formation.

Another reason is the quality of the equipment itself, and there is the parameter setting factor, all customers in the purchase of laser cutting machine, must be a professional operator to debug the equipment.

Solutions for burrs in sheet metal processing by laser cutting machine:

1. Air compressor must be equipped to cut with auxiliary gas.

Gas purity should be high, you can change to a better quality gas supplier. Gas purity is very important. It is better not to use cylinder gas, because after two fillings, the purity is not good and the gas is wasted.

For example, when laser cutting stainless steel, nitrogen is recommended as an auxiliary gas. Nitrogen is a flame-retardant gas. Nitrogen not only prevents the explosion point of laser cutting, but also prevents the heated end from instantaneous oxidation. The cutting end will be more smooth and bright. Auxiliary gas should be adjusted to 12-15 kg pressure. Nitrogen under this pressure will not completely prevent combustion, but also can quickly blow away the waste to remove burrs.

2. Find a professional operator to debug the parameters of metal laser cutting machine, until normal, we can successfully complete the cutting operation of metal laser cutting machine.

Some parameters setting factors of laser cutting machine also affect the appearance of slag, which leads to burrs of metal laser cutting machine. Therefore, it is necessary to adjust cutting parameters to the optimum, and the cutting speed of air pressure flow focal length and so on. After many adjustments, it is impossible to cut exquisite workpieces by the parameters provided by the machine.

Laser cutting machine is a precise machine, and its operation is also a delicate work. Often, a data error will cause the abnormal operation of its work. Therefore, it is necessary to work closely and carefully to reduce and avoid errors. Equipment + gas + parameters, adjusted to the best, cutting out the workpiece is no burr, so that laser cutting machine cutting becomes more quality.

Burrs only occur in metal cutting, and there is no burr problem in non-metal cutting. How do burrs arise? In fact, burrs are excessive debris particles on the surface of metal materials. If a material has burrs, then the material can be qualitatively inferior. The more burrs there are, the lower the quality naturally.

Secondly, according to the working principle of laser cutting machine, the reasons and solutions of burr are analyzed and obtained.

1. There is a deviation between the upper and lower positions of the focus of the beam. Solution: Adjust the position of focus and adjust it according to the offset.

2. The output power of the machine is not enough. Solution: Check whether the laser cutting machine works properly. If it is abnormal, it needs to be repaired and maintained in time. If normal, check whether the output value is correct.

3. The wire cutting speed of the cutting machine is too slow. Solution: Adjust and improve the WEDM speed in time.

4. The purity of auxiliary gas of cutting machine is not enough. Solution: Explain how to improve the purity of auxiliary gas.

5. The laser beam of the cutting machine is offset. Solution: debug the focus and adjust it in time.

6. The instability caused by the long operation time of laser cutting machine. Solution: Turn off the machine and restart it.

Metal laser cutting machine is a precise machine, and its operation is also a fine work. Often a data error will cause the abnormal operation of its work. Therefore, it is necessary to work closely and carefully to reduce and avoid errors.