There are many problems in the use of metal laser cutter, including errors in the laser cutting process and poor laser cutting results. How did these errors occur? Now the editor will answer for you.
1. The geometric error of the workpiece
Due to the influence of various reasons, the surface of the processed object is uneven, and heat will be generated during the cutting process, which makes the surface of the thin plate part easy to deform, and due to the uneven surface, the laser focus and the position and ideal position of the surface of the processed object will be affected. Random changes.
2. The cutting thickness of the material exceeds the standard
The thickness of the cutting material exceeds the standard. Take 3000 W as an example, the thickness of the sheet cut by the laser cutter is less than 20. The thinner the sheet, the easier the cutting.
The better the quality. If the sheet is too thick, the laser cutter will be difficult to cut. In the case of cutting, there will be errors in machining accuracy, so it is necessary to determine the thickness factor of the plate.
3. Wrong plan preparation
In the processing of the fiber laser cutter, the processing path on the complex curved surface is fitted by straight lines, arcs, etc. There are errors between these fitted curves and the actual curves. These errors lead to errors between the relative position of the actual focus and the surface of the processed object and the ideal programming position. And some teaching programming systems will bring some deviations.
4. The occurrence of focus position error in laser cutting
In the cutting process of the fiber laser cutter
, there are many factors that will cause the focal length and the relative position of the surface of the processed object to change. This is also related to the surface finish of the processed product, the clamping method of the workpiece, the geometric error of the machine tool, and the length of the machine tool. The deformation of time load, the thermal deformation of the workpiece during processing and other factors are related, and these factors will cause the deviation of the laser focus position and the ideal position (programmed position).
These random errors are unavoidable. Only through online detection and control can the errors be reduced, thereby improving the working accuracy of the fiber laser cutter.
When using the laser cutter, we import the prepared drawings into the program, and then use the typesetting software to arrange the drawings on the board, so that the laser cutter can process products in batches. Among them, although the typesetting process is very short, there is a lot of knowledge hidden in it. If the layout is slightly wrong, it will have a great impact on the cutting effect of the entire board. So, let us list six points to note in typography.
1. Corner melting
When cutting angle steel at a lower speed, the laser will melt the corner, which is caused by overheating. A small radius is generated at the corner to maintain high-speed laser cutting, avoid overheating and melting of the steel plate when cutting the corner, so as to obtain a good cutting quality, shorten the cutting time, and improve productivity.
2. Coplanar cutting
When two or more parts are combined into a group, a large number of conventional graphics should share the same side as much as possible. Cutting on the same side can greatly shorten the cutting time and save raw materials.
3. Disposal of remaining materials
After cutting the part, it is necessary to remove the skeleton like excess material on the worktable of the laser cutting equipment as soon as possible to facilitate subsequent cutting operations. For laser cutting equipment without automatic discharge device, the remaining material of the skeleton can be cut into small pieces for quick removal. To avoid personal injury caused by heavy and sharp edges of the operator.
4. Partial spacing
In general, when cutting thick plates and hot plates, the distance between the parts should be large, because the heat effect of thick plates and hot plates is large, and it is easy to burn edges when cutting sharp corners and small people, which affects the cutting quality.
5. Leadership environment
In the process of thick plate cutting, in order to better connect the cutting seams and prevent burns at the beginning and end of cutting, a transition line is often introduced before and after cutting, which are called lead and tail. Leads and tail wires are useless to the workpiece itself, so they should be arranged outside the scope of the workpiece. At the same time, the leads should not be set at sharp corners and other places where heat is not easy to dissipate. The connection between the lead and the slit should be as far as possible to use an arc transition method to make the machine run stably and avoid burns caused by the stalling of the corner.
6. Partial collision
In order to maximize production efficiency, many laser cutter worked continuously for 24 hours, using unmanned automatic loading and unloading devices to hit the cutting parts, causing damage to the cutting head and interruption of production, resulting in huge losses. This requires attention when sorting:
1 Choose a suitable cutting path to bypass the cutting part to reduce collisions.
2 Choose the best cutting route to shorten the cutting time.
3 Automatically or manually combine multiple small parts with micro joints. After cutting, the disassembled parts can be easily disconnected from the micro-connection.