Views: 4 Author: DURMAPRESS Publish Time: 2022-08-10 Origin: DURMAPRESS
With the deve opment of the economy. the appication of stainless steel p ate is more and more extensive.
Its products are now widely used in construction engineeringmachinery manufacturing container manufacturing,shipbuilding,bridge construction and other industries.
At present the cutting method of stainless steel thick plate is mainly laser cutting
The technology of laser cutting stainless steel thick plate is becoming more and more mature, which gradually replaces the traditional stainless steel cutting technology
In order to achieve high-quality cutting effectwe need to master certain process skills.
Generally speaking,the medium plate refers to the steel plate with a thickness of 10.0-
25.0mm,the plate with a thickness of 25.0-60.0mm is called thick plateand the plate with a thickness of more than 60.0mm is extra thick plate.
In order to cut high-quality thick stainless steelstainless steel product manufacturers need to fully understand the laser cutting processes
Criteria for laser cutting thick plate
The laser cutting section will form vertical lines
The depth of the grain determines the roughness of the cutting surface
The shallower the grainthe smoother the cutting section.
The deeper the grainthe coarser the section.
In addition, the shallower the grainthe higher the cutting quality
For thick sheet metal,the perpendicularity of the cutting edge is very important
When it is far away from the focusthe laser beam becomes divergentwhich may lead to inconsistency between the upper and lower widths of the slit;
If the cutting edge deviates too much from the vertical linethe workpiece will not be standard enough and difficult to use
The more vertical the edgethe higher the cutting quality
The cutting width determines the inner diameter of the profile.
During actual cutting, it is necessary to adjust parameters and compensate the cut materials to ensure that the workpiece is the required size.
When cutting thick plates at high speed,the molten metal is not ejected from the notch below the vertical laser beam, but eiected at the back of the laser beam.
This will form a curved pattern at the cutting edge
To solve this problem it is necessary to reduce the feed rate at the end of the cutting which can greatly eliminate the formation of grain.
Burr is a very important factor to determine the quality of laser cutting
Burr removal requires additional workwhich will be calculated in time and labor cost.
Therefore, whether there is burr is the basic standard to judge whether the laser cutting is qualified.
6. Heat affected area
The heat-affected area refers to the depth of the area where the internal structure changes.
In laser cuttingthe metal area near the notch is heatedwhich may lead to the change of metal structure.
For example some metals harden.
If cutting causes a part to heat rapidly,it will deformwhich is particularly important in fine machining.
Controlling laser power and using short laser pulses can reduce component heating and avoid deformation.