NC Tool Radius Compensation for Noncircular Cutting Traces
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Solution Overview
Problem
Existing cutting processing machines, such as laser processing machines, struggle to accurately correct the tool diameter of cutting tools when the cutting processing trace has a noncircular shape, as they are typically designed for circular shapes and lack precise control mechanisms for noncircular tool traces.
Innovation Solution
A cutting processing machine and method that include a tool radius compensation system, which generates and applies correction signals to adjust the tool trace based on product shape information, allowing for precise control of noncircular tool diameters by recognizing multiple tool traces and adjusting the control center point to maintain consistent tool radius compensation values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional tool radius compensation system is used that assumes a circular cutting processing trace, then the system is simple and easy to operate, but it cannot achieve high precision when the cutting processing trace has a noncircular shape
Solution Approach 1:
The patent implements dynamic tool radius compensation by making the control center point movable rather than fixed. The control center point is dynamically adjusted based on the actual noncircular tool trace shape, allowing the compensation amount to vary continuously along the cutting path. This dynamic adjustment mechanism enables high-precision cutting for noncircular shapes without requiring a complete redesign of the compensation system.
Solution Approach 2:
The patent changes the parameter of the control center point from a fixed position to a variable position that moves along the cutting path. By making the control center point position a variable parameter rather than a constant, the system can adapt to different trace shapes and maintain high precision. The compensation amount becomes a function of position along the trace, enabling accurate correction for noncircular geometries.
2Manufacturing precision
If the control center point is moved to achieve high precision for noncircular traces, then manufacturing precision is improved, but the control system becomes more complex
Solution Approach 1:
The patent performs preliminary calculation of the control center point position and tool radius compensation amount before actual cutting. The system pre-computes the varying compensation values based on the desired noncircular trace shape, storing them as lookup tables or pre-calculated data. During cutting, the system simply retrieves and applies these pre-calculated values, which reduces real-time computational complexity while maintaining high precision.
Solution Approach 2:
The patent introduces the control center point as an intermediary element between the tool trace definition and the actual cutting path control. This intermediary allows the system to decouple the tool trace shape definition from the direct control commands, enabling complex noncircular shapes to be controlled through a simplified intermediate representation that reduces overall system complexity.
Data Source
AI summary
A cutting processing machine (1) includes an NC device (200). The NC device (200) includes a tool radius compensation amount calculator (201), a processing trace calculator (202), and a driving controller (203). In a case where a processing condition (CP) includes cutting tool change information set with a change of a tool trace (TP) during cutting processing and set such that, in a case where the tool trace (TP) is changed, a control center point (CL) is fixed relative to a surface to be processed of a final processed product, the tool radius compensation amount calculator (201) recognizes a plurality of tool traces (TP) included in the cutting tool change information and generates tool radius compensation information (TC) that includes the plurality of tool traces (TP), positions formed with a surface to be processed (MPL), the control center point (CL), and tool radius compensation values (MVL). The processing trace calculator (202) generates a tool radius compensation control signal (TS).