A Control Method for Backtracking and Continued Machining of Original Trajectory in NC Machining

Abstract

The invention provides a method based on double track cache regions for controlling rollback and machining continuing of an original path of numerical control machining. The method comprises the following steps: S1, each path step A<n> is saved in a machining path cache region; S2, a rollback command and an original path machining continuing command are given, m is the number of rollback steps, and p is the number of original path machining continuing steps; S3, a path step A<n-x> is obtained, and the method goes to S4 when the path step A<n-x> is blank; S4, when rollback of the path step A<n-x> is completed, the method goes to S6, otherwise, to S5; S5, reverse interpolation is conducted for rollback, and the method goes to S4; S6, the path step A<n-x> is saved into a rollback path cache region, and the method goes to S7; S7, the method determines whether a specified rollback path step A<n-m> is reached, if so, the method goes to S8, and if not, the method repeats S3; S8, the method determines whether machining should be continued according to the original path, and if so, the method goes to S9; S9, a path step A<n-m+y> is obtained for machining, and the method goes to S10; S10, the path step A<n-m+y> is saved into the machining path cache region and deleted from the rollback path cache region, and the method goes to S11; and S11, the method determines whether the machining is completed according to required steps of the original path.

Description

technical field [0001] The invention relates to a control method for retreating and continuing processing of the original track of numerical control machining based on a double track buffer area. Background technique [0002] CNC machine tools are the main equipment for metal material processing, and users can realize automatic processing by programming CNC machining programs. [0003] In the process of processing, sometimes due to the inhomogeneity of the processed material, processing parameters and other factors, it may not meet the processing requirements in an uncertain section, and in some processing processes, due to special control requirements, it is necessary The processing track is retracted. When this happens, it is necessary to use the method of retraction processing to return the tool to the specified position along the original processing track, then start processing again, and continue processing along the original processing track. Because there may be pro...

AI Technical Summary

Problems solved by technology

[0004] Since the current original track back control technology generally adopts the method of single track buffer area, it only realizes single step back and all track back, and cannot realize any step track back and any step without interrupting the processing. Continue processing at any step on the original track after retraction

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