Cutting Edge Track Correction for Wear-Accurate Turning
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Solution Overview
Problem
The shape of a machined workpiece may deviate from a target shape due to factors such as wear of the cutting edge, necessitating machine downtime for replacement, which affects productivity.
Innovation Solution
A method and program for correcting the track of a cutting edge by setting it obliquely to the workpiece's axial line of rotation, measuring the machined surface errors, and using interpolation or approximation to adjust the cutting edge's position before subsequent machining, ensuring high accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cutting edge is used continuously without replacement, then productivity is maintained, but machining accuracy deteriorates due to cutting edge wear
Solution Approach 1:
The patent changes the parameters of the cutting edge track by calculating correction amounts based on measured machining errors. The control unit adjusts the track parameters (position coordinates) to compensate for cutting edge wear, allowing continuous use of the cutting edge while maintaining machining accuracy through dynamic parameter adjustment.
Solution Approach 2:
The patent implements a feedback mechanism where the measurement unit measures the actual machining surface, the control unit calculates the difference between target and actual surfaces, and this error information is used to correct the cutting edge track for subsequent machining operations, enabling continuous accurate machining.
2Manufacturing precision
If the cutting edge track is corrected based on measurement errors, then machining accuracy is improved, but device complexity increases due to additional measurement and control systems
Solution Approach 1:
The control unit performs multiple functions: it controls the cutting edge movement, calculates machining errors from measurement data, determines track correction amounts, and updates the cutting edge track. This multi-functionality reduces the need for separate dedicated correction devices, minimizing additional system complexity while achieving high machining accuracy.
Solution Approach 2:
The system performs self-correction by using its own measurement and control capabilities to detect and compensate for cutting edge wear. The control unit automatically calculates and applies track corrections without external intervention, making the system self-sufficient and reducing the need for additional complex correction equipment.
Data Source
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AI summary
A method of correcting a track of a cutting edge (2A) for machining by cutting a rotation symmetry plane (1A) of a rotating workpiece is provided. The cutting edge (2A) is set obliquely to an axial line of rotation (10) of the workpiece and moved in a direction inclined with respect to the axial line of rotation (10) while it is in contact with the rotation symmetry plane (1A). With movement of the cutting edge (2A), a point (3_t) on the cutting edge in contact with the rotation symmetry plane (1A) is moved along the cutting edge (2A) from a first end portion (3_1) of the cutting edge to a second end portion (3_5) of the cutting edge opposite to the first end portion. The correction method includes measuring, by a measurement unit, a shape of the cut and machined rotation symmetry plane (1A), calculating, by an operation unit, an error of the measured shape of the rotation symmetry plane (1A) from a target shape of the rotation symmetry plane (1A) in a direction of the axial line of rotation (10), and correcting, by the operation unit, a component in the direction of the axial line of rotation (10) of a track of a point of cutting based on the error.