Machine Tool Control for Oscillation Cutting Surface Roughness
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Solution Overview
Problem
Existing techniques struggle to accurately calculate and set machining conditions and oscillation conditions for oscillation cutting while considering surface roughness, leading to deteriorated surface quality in machined workpieces.
Innovation Solution
A control device for machine tools that includes a condition acquisition unit, a surface roughness calculation unit, and a surface roughness output unit, which calculates and displays surface roughness based on machining and oscillation conditions, allowing for easy setting and verification of these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If oscillation cutting is performed to prevent chip entanglement, then chip evacuation is improved, but surface roughness deteriorates
Solution Approach 1:
The patent applies dynamics by making the oscillation conditions variable rather than fixed. The control device dynamically adjusts oscillation amplitude and frequency based on real-time chip morphology detection, allowing the system to adapt oscillation parameters to maintain both effective chip evacuation and acceptable surface roughness throughout the machining process
Solution Approach 2:
The patent implements parameter changes by modifying oscillation conditions (amplitude, frequency, waveform) based on detected chip characteristics. The control device changes these parameters in response to chip morphology feedback, transforming the oscillation cutting process from a static to a dynamically adjusted operation that balances chip evacuation with surface quality
2Manufacturing precision
If oscillation conditions are adjusted to improve surface roughness, then surface quality improves, but chip evacuation effectiveness deteriorates
Solution Approach 1:
The patent implements feedback by using a detection device to monitor chip morphology in real-time and feed this information back to the control device. This closed-loop feedback system enables the control device to automatically adjust oscillation conditions to maintain optimal balance between surface roughness and chip evacuation, eliminating the need for manual trial-and-error parameter adjustment
Solution Approach 2:
The system applies self-service by automatically detecting chip morphology and self-adjusting oscillation parameters without external intervention. The control device uses the detection device's chip morphology information to autonomously optimize oscillation conditions, making the system self-regulating and adaptive to changing machining conditions
3Productivity
If machining conditions are set without considering surface roughness calculation, then machining efficiency is maintained, but surface roughness control becomes difficult
Solution Approach 1:
The patent applies preliminary action by calculating and predicting surface roughness before actual machining occurs. The control device uses the surface roughness calculation function to determine optimal oscillation conditions in advance, based on desired surface roughness specifications, and then sets these conditions automatically, eliminating the need for post-machining surface quality adjustments and rework
Data Source
AI summary
Provided is a technology with which it is possible to calculate surface roughness, and to easily set machining conditions and oscillation conditions while checking the calculated surface roughness. A control device 1 of a machine tool is for machining a workpiece while oscillating a cutting tool and the workpiece relative to each other, and comprises: a condition acquiring unit 12 that acquires machining conditions and oscillation conditions; a surface roughness calculation unit 13 that calculates surface roughness on the basis of the machining conditions and oscillation conditions acquired by the condition acquiring unit 12; and a surface roughness output unit 14 that outputs the surface roughness calculated by the surface roughness calculation unit 13.