All kinds of keen professional skills, except for a few cases can start the plate boundary, generally must be in the board through a small round hole. Previously, in the laser stamping die compound machine, a hole was first broken with a punch needle, then the laser was used to start cutting the small hole.

It is more more widely used in industrial production manufacturing. But every application is infallible, smooth sailing, so in case of a problem, how to solve it? Let's look at it one by one today!

1. Professional skills of cutting holes

All kinds of keen professional skills, except for a few cases can start the plate boundary, sheet metal cutting manual must generally wear a small round hole in the plate. Previously, in the laser stamping die compound machine, a hole was first broken with a punch needle, then the laser was used to start cutting the small hole. There are two kinds of root pressing methods for laser cutting starting without punching machine tool

Single pulse hole breaking: the pulse light with peak output power is used to melt vaporize a small number of materials. In the form of sheet metal cutting, common gas N2 is used as the matching vapor to reduce the hole expansion caused by causticization. The air pressure is lower than the CO2 working pressure when cutting. Each pulse of light only produces a small gushing of particles, which is pushed forward slowly. Therefore, it takes several seconds for a thick steel plate to break a hole. Once the hole is broken, the steam body is replaced with CO2 to carry out cutting. As a result, the hole diameter is smaller, the hole quality is better than that of explosion. Therefore, the laser generator used should only have high power, but also the time of light the characteristics of indoor space. In addition, stronger gas supply control system software is needed for the single pulse hole breaking, so as to carry out the conversion of vapor type, air pressure operation at the time of hole breaking.

Explosion hole: the material forms a dent in the middle after being reflected by a CW laser, then a hole is formed by rapidly removing the melted material by the oxygen flow coaxial with the particle beam. Generally, the size of the hole is related to the thickness of the plate, the diameter of the explosion hole is equal to half of the thickness. Therefore, the explosion hole diameter of the plate with partial thickness is large round, which is suitable for the parts with high processing accuracy requirements, but only for waste. In addition, because the common working pressure of CO2 is the same as that of cutting, the splashing is very large.

2. The analysis of burr on the workpiece when laser cutting processing stainless steel cold rolled aluminum coated steel plate

The above situation mainly considers the factors that show the burr when cutting high carbon steel, but it is easy to simply speed up the cutting rate, because sometimes the plate can be cut through by adding the rate, which is especially true in the production processing of aluminum coated cold-rolled steel sheet. At this time, we should sort out think about other factors of CNC lathe to solve, such as whether the nozzle should be replaced, the slide track fitness movement is unstable, etc.

3. Analysis of the deformation of small round hole in cutting production

It is because CNC lathe in the production processing of small round holes is to listen to the opinions of explosion, but to use the way of single pulse hole breaking, which makes the laser kinetic energy in a small area excessively gather, burning the non production processing area, resulting in hole deformation, endangering the quality of production processing. At this time, we should change the single pulse hole breaking mode into explosion hole breaking mode in the production processing program flow to solve the problem. On the contrary, the laser cutting start-up with low output power is just the opposite. In the production processing of small round holes, we should listen to the opinions of the single pulse hole breaking method to obtain good surface smoothness.

4. Solutions for abnormal flame when cutting high carbon steel

This kind of situation will harm the production processing quality of cutting cross section smoothness of parts. At this time, under the condition that all other main parameters are normal, the following conditions should be considered: the nozzle nozzel of laser head is consumed, the nozzle should be replaced immediately. When there is no new nozzle replacement