Ruled Surface Machining Paths for Soft Cutter Error Compensation
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Solution Overview
Problem
Current 3D CAM software for ruled surface machining with soft cutters faces issues such as discontinuity in speed and acceleration, large errors in machining vector movement trajectories, and inconsistencies in upper and lower contours due to natural defects of beam cutters, lacking effective control and compensation.
Innovation Solution
A method and apparatus for generating a ruled surface machining path that involves acquiring target ruled surfaces, generating mathematical models, determining current machining speeds based on these models and preset parameters, and calculating machining path data to optimize speed and control natural defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the continuous smooth curve is cut into a series of straight segments for programming, then the machining path can be generated using traditional CAM software, but the continuity of speed and acceleration is destroyed and the error of machining vector movement trajectory becomes very large
Solution Approach 1:
The patent divides the continuous smooth curve into a series of straight segments for programming purposes. This segmentation allows traditional CAM software to generate the machining path while enabling subsequent optimization of speed and acceleration continuity at the segment level, thus resolving the contradiction between ease of manufacture and manufacturing precision.
Solution Approach 2:
The patent optimizes the parameters (speed and acceleration) at the connection points of straight segments to ensure continuity. By adjusting these parameters dynamically, the method maintains smooth motion while using segmented paths, thereby reducing trajectory errors and improving manufacturing precision without sacrificing the ease of path generation.
2Ease of manufacture
If traditional NC machining is used for ruled surface machining, then rigid cutter machining can be performed, but there is no control and compensation for the natural defects of soft cutter machining such as taper errors and skirt-like errors
Solution Approach 1:
The patent introduces feedback mechanisms by calculating and compensating for the natural defects of soft cutters. The system determines the actual machining path by considering the deflection characteristics of soft cutters, and adjusts the programming path accordingly to compensate for taper errors, skirt-like errors, and barrel-like errors, thereby improving contour consistency.
Solution Approach 2:
The patent performs preliminary compensation calculations before actual machining. By pre-calculating the expected deflection and error patterns of the soft cutter, the system adjusts the machining path in advance to counteract these natural defects, ensuring better contour consistency without requiring complex real-time control during machining.
3Device complexity
If the length of straight segment is increased to reduce programming complexity, then the programming process becomes simpler, but the error of machining vector movement trajectory becomes very large
Solution Approach 1:
The patent dynamically adjusts the parameters at the connection points of straight segments (speed, acceleration, and direction) to compensate for the errors introduced by segmentation. This allows the use of longer straight segments for simpler programming while maintaining high machining precision through parameter optimization at critical points.
Solution Approach 2:
The patent introduces dynamic optimization of motion parameters along the machining path. By making the speed and acceleration profiles adaptive rather than constant, the system can use fewer, longer segments while maintaining precision through dynamic adjustment of motion characteristics at segment transitions.
Data Source
AI summary
A method, an apparatus and a device for generating a ruled surface machining path, and a medium relate to the field of numerical control machining technologies. The method includes: acquiring each target ruled surface in a three-dimensional diagram of a target workpiece to be machined; generating a mathematical model of each target ruled surface according to each target ruled surface; determining a current machining speed according to the mathematical model and preset machining process parameters; and calculating machining path data corresponding to the target ruled surface according to the current machining speed. The technical problems of large errors and lack of control and compensation on natural defects of “soft knife” machining in the existing ruled surface machining method are solved. The beneficial effects of reducing errors of ruled surface machining and improving control and compensation on the natural defects of “soft knife” machining are obtained.