Machining Error Calculation for Interrupted Cutting Tools
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Solution Overview
Problem
Current machining error calculation methods for interrupted cutting with rotation tools are not precise enough, leading to suboptimal machining conditions and increased errors in workpiece shape.
Innovation Solution
A machining error calculation apparatus and method that calculates the displacement of the rotation tool's center based on cutting resistance force, relative tool-edge position, and absolute tool-edge position, allowing for precise determination of machining errors by considering dynamic properties and vibration states of the tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional machining error calculation methods are used for interrupted cutting, then the calculation process is simple, but the machining error calculation precision is insufficient
Solution Approach 1:
The calculation system is segmented into distinct functional units: cutting resistance force calculation unit, tool center displacement amount calculation unit, relative tool-edge position calculation unit, absolute tool-edge position calculation unit, machined shape calculation unit, and machining error calculation unit. Each unit handles a specific aspect of the calculation process, enabling high-precision machining error calculation through systematic decomposition of the complex calculation task.
2Measurement precision
If the displacement amount of the rotation center is used directly as the machining error, then the calculation is simple, but the machining error calculation is not precise because it does not account for the relative position of the cutting edge during rotation
Solution Approach 1:
The system dynamically calculates the relative tool-edge position based on the rotation phase of the rotation tool, and combines this with the tool center displacement to determine the absolute tool-edge position. This dynamic approach accounts for the changing position of the cutting edge during rotation, enabling precise machining error calculation that reflects the actual machining conditions at each phase of the rotation cycle.
Data Source
AI summary
The present invention discloses a machining error calculation apparatus for calculating the machining error more precisely through analysis. The apparatus comprises: a tool center displacement amount calculation part for calculating a displacement amount of a rotation center of the rotation tool according to the cutting resistance force in the rotation tool, in the case that the cutting resistance force generated in the rotation tool during said interrupted cutting is varied; a relative tool-edge position calculation part for calculating a relative tool-edge position of the cutting-edge portion with respect to the rotation center of the rotation tool; an absolute tool-edge position calculation part for calculating an absolute tool-edge position of the cutting-edge portion with respect to the workpiece, based on the displacement amount of the rotation center of the rotation tool and the relative tool-edge position; a machined shape calculation part for calculating the machined shape of the workpiece through transferring the absolute tool-edge position on the workpiece; and a machining error calculation unit for calculating a machining error of the workpiece based on a difference between the machined shape of the workpiece and an objective shape of the workpiece.