A method to actively prevent interference collisions between alternate tool paths in digital manufacturing operations

Abstract

The invention belongs to the technical field of mechanical processing and discloses a method for actively preventing a take-over tool path in a digitized manufacturing operation room from interferenceand collision. A machine tool safety point is arranged in such a way that a reciprocating tool path between a CAM programming and machining operation evading point and a machine tool safety point canbe prevented from interference and collision, and the reciprocating tool path is used as the take-over tool path in a machining operation room; according to features of a machine structure and a control system, an NC program segment for the machine tool to move from the machining operation evading point to reach the safety point is designed; at a machining operation take-over position, the NC program between the machining operation evading point and the machine tool safety point can be automatically added in an NC program generated after machining operation post-processing is realized throughdevelopment of a machine tool-specific post-processing program. The method disclosed in the invention is advanced in design principles and convenient and reliable in implementation. Requirements forCAM tool path designers can be lowered. The method is actually verified on a plurality of different machine tools, take-over tool path in the machining operation room in digitized manufacturing can becompletely prevented from interference and collision, and active safety can be realized.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for actively preventing interference and collision of alternate tool rails during digital manufacturing operations. Background technique [0002] CAM programming NC machining is generally an integrated machining of NC programs generated by multiple machining operations and post-processing in one clamping. Interference collisions between machine tools and process systems often occur during machining. The interference collision in CAM programming NC machining is divided into two types: the interference collision of the inner tool path in the processing operation and the interference collision of the alternate tool path in the machining operation. [0003] In order to avoid the interference and collision of alternate tool paths between CAM programming and machining operations, it can be completed by coordinating and setting operation avoidance poin...

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Problems solved by technology

[0004] 1. For multi-axis machining, the replacement toolpath between machining operations often has a large span and is unimaginable. It is very complicated and cumbersome to coordinate and set operation avoidance points between machining operations. not achieve the desired effect;

[0005] 2. All the avoidance points set in the processing operation are relative to the machining zero point of the part program, and change with the clamping position of the part on the machine tool table and the movement of the program zero point. The setting of the point position is relatively conservative, and the avoidance cannot be fully realized;

[0006] 3. For machine tools with different structures and strokes, the setting requirements for operation avoidance points are often different, and some of them have relatively large differences

Avoiding interference and collision by coordinating and setting avoidance points between machining operations is aimed at a certain type of machine tool, and the versatility of NC programs generated by the tool path of the same machining operation on machine tools with different structures is greatly limited;

[0007] 4. Since the setting of the avoidance point of the processing operation of different parts is different, the difference is still relatively large. When adjusting the processing sequence of the processing operation, it is necessary to adjust the avoidance point according to the requirements of the front and rear processing operations. The workload is heavy, and it is easy to forget and make mistakes.

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