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Introduction of laser cutting machine

Numerical control laser cutting machine is a machine tool that uses laser as a tool (cutter) to cut workpieces laserpecker 2 pro. With the development of laser cutting machine and laser technology, lasers have experienced three generations of development from YAG (solid-state laser) and CO2 (carbon dioxide laser) to the current mainstream fiber laser. This paper focuses on CO2 numerical control laser cutting machine and fiber laser cutting machine.

Laser cutting laser cutter.

Laser cutting is an advanced material processing and widely used cutting technology laserpecker 1, it is a hot cutting processing method, using high energy density laser beam as a“Cutting tool” to cut the material. The high power density laser beam irradiates the workpiece, which makes the irradiated material reach the ignition point or melt and ablate quickly. The numerical control laser cutting machine has the advantages of precision manufacture, forming process, flexible cutting, one-time forming, high speed and high efficiency, the appearance of laser cutting machine has epoch-making significance for the development of industry.

Laser can cut most metal and nonmetal materials. In the electrical manufacturing industry, it is mainly used for sheet metal processing of switchgear; In the transportation machinery industry, it is mainly used for the manufacture of transportation machinery, handling vehicles and loading and unloading machinery; In the petrochemical industry, it is mainly used for cutting oil sieve seam pipes; In the automobile manufacturing industry, it is mainly used for cutting complex body panels and various curved surfaces, including plane cutting and three-dimensional cutting; In the construction machinery manufacturing industry, it is mainly used for processing mechanical structural parts; In the medical device industry, it is mainly used for the processing of medical devices, and the laser cutting machine can cut most metal materials and nonmetal materials. In the construction machinery manufacturing industry, it is mainly used for machining mechanical structural parts; In the medical device industry, it is mainly used to manufacture medical machinery, which can meet the requirements of precision, safety and surface roughness of medical machinery. In the decoration industry, it is mainly used to cut various public leisure places, such as hall wall decoration, advertising signs and so on. ; In the packaging industry, it is mainly used to process packaging boxes of various shapes and sizes.

The hardware of laser cutting machine is mainly composed of bed, beam, worktable, laser, cutting head, voltage regulator, water cooler, electronic control cabinet, gas source (oxygen, nitrogen, air) , the system includes electrical system, mechanical system, gas system, optical system, hydraulic system, lubrication system and cooling system, is a set of mechanical, optical, electrical, pneumatic, liquid in one of the automatic equipment. The processes used in machine tool manufacturing are bending, welding, machining, and assembly. The main reason is that the gear transmission has high instantaneous transmission precision, can bear heavy load and high efficiency.

CO2 CNC Laser Cutting Machine

The LC series CO2 numerical control laser cutting machine produced by R&D in China is shown in Figure 1. The main machine of the machine tool consists of a workbench (commonly a single workbench toothed workbench and a sprocket-driven exchange workbench) where the mechanical part moves in X, Y and Z axes and a gantry suspension structure. The transmission part is driven by a large screw, and the beam moves in the Y axis of the fixed beam, while the follower slides in the X axis of the fixed beam, and the cutting beam moves in the X axis of the fixed beam and is driven. The beam moves on the fixed beam in the Y axis, the driven slide moves on the beam in the X axis, and the cutting head can move up and down (Z axis) relative to the plate on the driven slide.

The laser is the device which produces the laser light source, is the laser cutting machine core component. CO2 laser light-emitting principle as shown in Figure 2, the external gas from carbon dioxide, nitrogen, helium ternary gas, filled with resonant cavity, through 40,000 volts of high pressure to produce laser, laser in the tail mirror, refracting mirror, mirror period, and finally from the mirror output laser beam.

The advantage of CO2 numerical control laser cutting machine is that it can cut stainless steel with exquisite cross section, as well as non-metallic materials (such as acrylic and plexiglass). ). The disadvantage is that its photoelectric conversion rate is not high, ranging from 8% to 12%, with high power consumption and high equipment maintenance cost. The dust brought by external gas will accumulate on the lens to produce burn marks, and the lens replacement cost is high. Coupled with the development of a new generation of fiber lasers, CO2 lasers are gradually eliminated in the industrial field.

Fibre Laser Cutting Machine

I developed and produced the FC series fiber laser cutting machine as shown in Figure 2, gantry structure, gear and rack transmission part, bed beam for X-axis movement, on the beam slider for Y-axis movement, the cutting head is mounted on the slide block and is used for Z-axis movement through the screw or the module.

The light-emitting principle of fiber laser is shown in Figure 4. The laser is composed of modules, which represent a section of power, and the modules are added together to synthesize the total power. Inside the module is a pump source, which sends pump light through a coupler to generate optical fiber to send laser light.

Fiber laser cutting machine has the advantage of high photoelectric conversion