Sheet Metal one of the processing technology - laser cutting

- Feb 19, 2019-

Laser cutting uses a focused high-power-density laser beam to illuminate a workpiece, causing the material to be irradiated to rapidly melt, vaporize, ablate, or reach a flash point. At the same time, the molten material is blown off by a high-speed airflow coaxial with the beam, thereby cutting the workpiece. open. Laser cutting is one of the hot cutting methods.


Laser cutting is characterized by fast cutting speed and high quality. Specifically summarized as the following aspects.

(1) Good cutting quality

Laser cutting can achieve better cutting quality due to the small laser spot, high energy density and fast cutting speed.

1 The laser cutting slit is narrow, the slits are parallel and perpendicular to the surface, and the dimensional accuracy of the cut parts can reach ±0.05mm.

2 The cutting surface is smooth and beautiful, the surface roughness is only a few tens of microns, and even laser cutting can be used as the last process. No machining is required, and the parts can be used directly.

3 After the laser is cut by the laser, the width of the heat-affected zone is small, the performance of the material near the slit is almost unaffected, and the deformation of the workpiece is small, the cutting precision is high, the geometry of the slit is good, and the shape of the slit cross-section is relatively regular. Rectangular.

(2) High cutting efficiency

Due to the transmission characteristics of the laser, the laser cutting machine is generally equipped with multiple numerical control worktables, and the entire cutting process can realize numerical control. During operation, it is only necessary to change the numerical control program to apply the cutting of different shapes of parts, which can perform two-dimensional cutting and three-dimensional cutting.

(3) Fast cutting speed

Cutting a 2mm thick low carbon steel plate with a power of 1200W, the cutting speed can reach 600cm/min; cutting a 5mm thick polypropylene resin plate, the cutting speed can reach 1200cm/min. The material does not need to be clamped and fixed during laser cutting, which saves the fixture and saves the auxiliary time of loading and unloading.

(4) Non-contact cutting

There is no contact between the torch and the workpiece during laser cutting, and there is no tool wear. To machine parts of different shapes, there is no need to change the "tool", just change the output parameters of the laser. The laser cutting process has low noise, low vibration and no pollution.

(5) There are many types of cutting materials

There are many types of laser cutting materials, including metal, non-metal, metal-based and non-metal matrix composites, leather, wood and fiber.

(6) Disadvantages

Laser cutting Due to the limitation of laser power and equipment volume, laser cutting can only cut medium and small thickness plates and tubes, and the cutting speed decreases significantly as the thickness of the workpiece increases.