Five-axis processing of plastic parts How to ensure the quality of processing?
Five-axis processing of plastic parts is a more commonly used form of processing now. It can process complex-shaped parts that ordinary machine tools cannot process. However, when using five-axis processing, you also need to master the corresponding technology, otherwise you will be processing complex parts. Quality problems are prone to occur when
1. Compile the tool program
Although the tool length compensation function in five-axis machining is still effective, the tool radius compensation is invalid. This is because the ISO file does not provide enough data to recalculate the tool position. Therefore, in order to ensure reliable machining quality, it is necessary to compile different programs for different diameters of the tool when performing five-axis machining.
2. Use post processor
The difference between five-axis and three-axis machine tools is that there are two rotating coordinates on the five-axis machine tool and the tool position is converted from the workpiece coordinate system to the machine tool coordinate system, and the coordinates need to be changed several times in the middle. With the help of the current popular post processor generator, the post processor of a three-axis Cnc Machine tool can be generated only by inputting the basic parameters of the machine tool. For five-axis CNC machine tools, there are currently only some improved post-processors and the post-processors of five-axis CNC machine tools need to be further developed.
3. Solve the problem of nonlinear error and singularity
The kinematics of five-axis machining after the introduction of rotating coordinates is much more complicated than that of three-axis machine tools. One of the main problems related to rotation is the nonlinear error and it belongs to the programming error. In order to avoid this error, the programmer cannot know the size of the nonlinear error in the pre-calculation stage. Only after the machine tool program is generated by the post processor, the nonlinear error It is possible to calculate the error.
Although five-axis machining has more advantages than ordinary machining methods, in order to avoid the inefficiency of the entire machining process and the unsatisfactory quality of the machining, when using the five-axis machining of plastic parts, everyone should program the tool first. After that, we must make good use of post-processors and solve problems such as non-linear errors.
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