Laser cutting machine is a laser beam that focuses the power of adult entrance examination through optical system software. The laser beam irradiates the surface of the product workpiece to make the product workpiece reach the melting point or melting point, while the pressurized steam coaxial with the beam blows away the melted or vaporized metal materials.

1. Beam self-collimation with beam extender.

The beam diameter is inversely proportional to the far-field emission Angle. The larger the beam diameter, the smaller the far-field emission Angle. At present, beam extenders are divided into two types: refraction type and double beam type, whose basic principle is equivalent to an inverted telescope.

The key role is to reduce the far-field emission Angle by increasing the beam diameter, so as to improve the focal size instability and deep focus caused by the change of optical path length. At present, there are few scientific researches on beam autocollimation level in China, most of which are refraction, and there are few discussions on double beam.

The design scheme, production, processing and adjustment of the refraction beam extender are very easy, but because the double lens is very easy to overheat, resulting in the deformation of the lens, the refraction beam extender is only suitable for the self-collimation of the beam with small output power of the Qingdao handheld laser welding machine manufacturer. However, for high power beam autocollimation such as laser cutting machine, double beam expanding mirror is generally used.

However, the Angle of mirror glass can not be determined by analysis method, but can only be obtained by linear fitting of standard value. As a result, it is very difficult to design, manufacture and adjust. Therefore, Qingdao handheld laser welding machine manufacturer compensates the navigation optical system software of laser cutting machine according to the self-collimation method of beam extender beam.

2. Choose a variable Angle lens

According to the total input and output flow of the quantitative pump, the pressure in the stainless steel water tank in the lens can be changed, so as to change the Angle of the focusing double lens and change the main parameter F in the focusing equation. The variable Angle lens can dynamically adjust the state parameters of the beam when the length of the optical path changes, so as to maintain the radius of the focus and the stability of the deep focus.

The VRM system requires a closed-loop control system because of its complex architecture and high cost. Some advanced equipment abroad has chosen this optical path compensation strategy.

3. Equal optical path system software directly driven by AC servo motor.

Compared with the above two optical path compensation measures, the equal optical path has the advantages of simple structure, low cost, convenient adjustment, and can ensure that the total area of the spot on the focusing bifocal lens will not change in the process of continuous production. At the same time, the radius of the focal point and the size of the deep focal point can be changed according to different laser cutting process regulations.

Choosing the mechanism to complete the optical compensation will make the structure of the facility too large, at the same time will increase the complexity of mechanical equipment, installation and adjustment of the difficulty coefficient is large. With the improvement of servo control technology, Qingdao hand-held laser welding machine factory selects AC servo motor instant lifting and other optical path equipment, which has the advantages of simple structure and convenient adjustment. It is an economical and easy to use optical path compensation scheme.

The equal optical path compensation scheme of AC servo motor is mainly composed of laser generator, reflector fixed on the whole body, compensation reflector on the fitness equipment driven by AC servo motor, reflector on the bearing beam and reflector on the Z axis.

When there are different production processing needs, such as laser cutting stainless steel sheet and high carbon steel sheet, the focal size, focal depth and moving speed must be different. At this time, the optical path length can be changed by changing the initial position of the equipath device through the control panel.