Analysis of processing errors

Error in the machining principle. The error in the machining principle is that in the actual machining process of mechanical parts, the use of methods, tool contours and gear ratios similar to the theoretical machining methods will cause the resulting parameters of the part to deviate from the theory. The most common cause of accuracy error in CNC machining. There are two reasons for this error: a. In actual work, CNC machine tools use similar machining methods to make the machining process look similar. theory, the machining methods used are different from the theoretical ones, which will inevitably lead to errors in the machining principles. b. The tools used in actual machining are different from the theoretical forms, such as the use of tool contours requires the tool. the tool surface must have very high precision, but in actual operation, the tool used in machining can not meet the ideal requirements. Generally, approximate tool surfaces such as arcs, straight lines, etc. are used to replace the linearity. cause errors in the machining theory in the process of tool contour machining. a. Errors in the process system caused by changes in the position of the force point of mechanical parts. the system usually changes according to the cutting position. The change in position between them causes the force point of the workpieces to change constantly, and in the staggered position, a certain error occurs due to the degree of machining. b. errors. During machining, the force point of the workpieces changes constantly, and the degree of cutting at the points will also be different. Since the workpieces themselves have uneven materials, shapes and sizes, the cutting force of different force points will be different during the machining process, which leads to errors in the machining technology.