The influence of different power, speed and focal length on cutting effect

2023-04-08

• Power is one of the important factors affecting cutting

In the process of laser cutting, in addition to considering the cutting speed, the type and thickness of the material to be cut and other factors, also should consider the material, shape and Angle of the material to be cut.

In order to improve the cutting quality, the best cutting power should be selected as far as possible.

In machinery manufacturing and repair, often encounter a variety of different materials of the workpiece, these workpiece in addition to the size of the larger, complex shape, but also with soft material, low strength

Point. In the machining process of these workpieces, it is necessary to choose the corresponding machining method according to the characteristics of the material. For example, the hardness of steel plate is higher, so the cutting machine should be used when cutting

High power cutting speed; And for aluminum alloy and other materials, hardness is low, so when cutting should choose small power, slow cutting speed cutting machine.

When the power is changed at a constant speed, the depth of cutting will gradually deepen with the increase of power. During the cutting process, the maximum should be determined according to the type, thickness and cutting speed of the material to be cut

Good power, so as to obtain the best cutting effect.

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• Below we show the effects of different power cutting effects

It can be concluded that the higher the power, the deeper the cutting depth; The lower the power, the shallower the cut.

Effect of speed on cutting effect

In the cutting process, with the increase of the speed, the cutting surface will become smoother and smoother, but this is only relative to the cutting speed. 

The faster the cutting speed, the lower the surface roughness.But there is still some roughness on the surface.

At different cutting speeds, the heat affected zone of the material being cut will change, and this change is also related to the material itself. At room temperature, when the cutting speed is low (≤5m/s),

The heat affected zone of the material being cut Narrows and the surface becomes smooth. For some materials with special requirements (such as stainless steel, titanium alloy, etc.), the cutting speed should be adjusted appropriately. If in the same

Under the condition, when the steel plate is repeatedly cut, individual notches are found to be not smooth.

The influence of focal length on cutting effect

Laser focal length, refers to the laser beam from a point to another point of the furthest distance. It reflects the relationship between the optical axis of laser beam and the optical axis of objective lens.

According to the focal length formula of optical system, the shorter the focal length, the higher the magnification, and the longer the focal length, the lower the magnification. But for ordinary laser amplification

In terms of multiples, the focal length is almost constant numerically.

Under certain conditions (such as: the optical system parameters are the same), the shorter the focal length, the longer the focal depth, vice versa;

When the laser is focused on the focal point of the lens, the distance from the focal point of the laser to the center of the lens is called the depth of focus (i.e. the distance between the center of the laser beam in the lens).

When the focal depth is constant, the shorter the focal length, the longer the focal depth.

The reciprocal ratio of the focal length of the lens is called the variable-magnification ratio or variable-magnification coefficient.

It can be seen that; 1. As the focal length increases, the slit will become wider and wider

2. The depth of the cut becomes shallower as the focal length increases