In fact, the processing effect of the laser cutting machine is very good, so you can rest assured to use the laser cutting machine for processing, but after a period of time, many factors will cause a certain decrease in the processing accuracy of the laser cutting machine, so you know the processing of the laser cutting machine Accuracy error?
The processing accuracy of laser cutting machines is currently the main standard parameter used in the industry to measure the quality of machine tools. In the process of equipment sales, sales staff will give a detailed description of the processing performance of the product. The processing accuracy of the laser cutting china machine is mainly within the error range of 0.5 mm, and some manufacturers provide high-precision laser cutting machine tools with a processing accuracy of 0.3 mm, but generally speaking, there is still a certain error range of cutting accuracy, which is what we call Machining tolerances.
The processing of the laser cutting machine is based on the cutting drawings of the design company. Generally speaking, the size of the part cutting drawing has a clear tolerance area and value indication. Considering the inconsistency of the tolerance zone position of the cut parts, it may be necessary to eliminate the above tolerance zone through a variety of technological methods in the actual cutting process.
In the programming of laser cutting machines, if the methods and techniques are used properly, it is of great significance to ensure and improve the machining accuracy of CNC machine tools. Many dimensions of the parts have tolerances, and the positions of the tolerance zones cannot be consistent. However, the NC program is usually compiled according to the contour of the part, that is, according to the basic size of the part, ignoring the influence of the position of the tolerance zone. In this way, even if the precision of the CNC machine tool is very high, the processed parts may not meet the dimensional tolerance requirements.
In terms of processing methods, radius compensation can be used to compensate for the effects of cutting tolerances. This method is relatively simple for the actual cutting operation. The specific idea is still that the program of the laser cutting machine control system is based on the basic dimensions, that is, the calculation and the program are based on the basic dimensions of the part, and the outer circle is processed by the same turning tool, but it is not different in the process of processing. The tool radius compensation value is used for the same tolerance zone. In this way, we need to know the radius of the tool tip arc (this part of the processing path is parallel to the x-axis and z-axis, so there is no need to know the radius of the tool tip arc), so it is inconvenient to use and can only be used in some CNC systems .
The above processing methods may be more complicated in the later cutting operation. In the early stage of cutting, it is also feasible to modify the size of the cut piece according to the drawing requirements to eliminate the influence of the tolerance zone. The specific idea is to change the position of the basic size and tolerance zone; the realization is to adjust the position of the basic size and tolerance zone on the premise of keeping the part size unchanged.
It is generally adjusted according to the symmetrical tolerance zone and the adjusted basic size and tolerance. Program according to the adjusted basic size to ensure the machining accuracy using the same turning tool and the same tool compensation value (the machining path is parallel to the x-axis and z-axis at this time, and tool compensation is not required). Of course, if the parts need to be finished (such as fine grinding), in order to ensure sufficient grinding allowance, the basic size can be slightly increased (the tolerance zone is asymmetric at this time).