Milling finish machining method for side wall of difficult-to-cut material or large-size three-dimensional molded surface part

Abstract

The invention discloses a milling machining error online detection self-adapted machining method for a side wall of a difficult-to-cut or large-size three-dimensional molded surface part. The method comprises the following steps: after machining a three-dimensional molded surface layer by layer, measuring an appearance error of the three-dimensional molded surface; and automatically calculating compensation according to a detection value to determine a final finish machining track so as to finish the finish machining of the three-dimensional molded surface. According to the milling machining error online detection self-adapted machining method, a part size in a machining process is measured so that machining comprehensive errors caused by the factors including tool abrasion, part rigid deformation, non-uniform hardness and the like are eliminated, and the machining precision of the difficult-to-cut or large-size three-dimensional molded surface part is greatly improved.

Description

technical field [0001] The invention relates to the field of numerical control milling, in particular to a method for milling and finishing the side walls of three-dimensional surface parts, and is particularly suitable for milling and finishing of difficult-to-cut materials or large-scale three-dimensional surface parts. Background technique [0002] In actual production, as figure 1 Typical parts shown, the side walls of such parts are composed of slopes at a small angle to the normal to the bottom surface, forming a three-dimensional profile. The processing of this kind of three-dimensional surface parts is usually to use R knife or ball head knife for layer cutting. If the strength of the workpiece is low or the structure is limited (for example, the size of the round corner is required), the R angle of the tool cannot be too large (to control the cutting force), and the Z-direction layer cutting step distance needs to be small, so its The processing paths are long. ...

AI Technical Summary

Problems solved by technology

From previous processing experience, it can be seen that the problem of cutting tool wear is particularly prominent in the processing of large parts and difficult-to-cut materials. The reason is that during the processing of large parts, the tool will gradually wear out as the cutting length increases. It cannot be solved by manual inspection and adjustment of tool parameters, which will affect the processing quality of parts

Second, there will be tool clearance caused by insufficient rigidity of the parts, resulting in poor machining accuracy

In addition, the uneven hardness of the parts will also cause milling contour errors

Images