Oscillating Cutting Control for Lower Machine Tool Load
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Solution Overview
Problem
Conventional oscillation cutting techniques burden machine tools significantly, depending on their configuration, especially when dealing with workpieces of tapered or arc shapes, as they require multiple feed axes and complex oscillation directions, leading to increased machine tool strain.
Innovation Solution
A control device for machine tools that includes a cutting edge angle acquisition unit, oscillation amplitude calculation unit, oscillation direction determination unit, and oscillation control unit, which calculates and determines the optimal oscillation amplitude and direction to minimize machine tool burden by shifting the oscillation direction from the machining course to a perpendicular direction, reducing the composite oscillation amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If oscillation is made simultaneously along multiple feed axes (Z-axis and X-axis) for tapered or arc-shaped workpieces, then chip shredding is achieved, but the burden on the machine tool becomes great
Solution Approach 1:
The patent changes the oscillation parameters by determining an optimal oscillation direction based on the cutting edge angle and workpiece geometry. The oscillation amplitude calculation unit calculates the necessary amplitude for chip shredding in the determined direction, replacing the conventional approach of simultaneous multi-axis oscillation with oscillation along a specifically determined direction, thereby reducing machine tool burden while maintaining chip shredding effectiveness
Solution Approach 2:
The patent introduces dynamic adjustment of oscillation parameters during machining. The control device dynamically determines the oscillation direction based on the cutting edge angle and calculates the appropriate oscillation amplitude, allowing the oscillation characteristics to adapt to different machining conditions and workpiece geometries, thus optimizing the balance between chip shredding and machine tool load
2Force
If oscillation direction is changed from machining course direction to reduce machine tool burden, then burden reduction is achieved, but the effect depends on machine tool configuration (inertia differences)
Solution Approach 1:
The patent employs parameter changes by calculating the optimal oscillation direction and amplitude based on the cutting edge angle and workpiece geometry rather than using fixed oscillation directions. This allows the oscillation parameters to be adapted to different machine tool configurations, making the burden reduction method versatile and effective across various machine tools regardless of their specific inertia characteristics
Solution Approach 2:
The control device uses feedback from the cutting edge angle acquisition and oscillation amplitude calculation to determine the appropriate oscillation direction. This feedback mechanism ensures that the oscillation parameters are optimized based on actual machining conditions, enabling the system to adapt to different machine tool configurations and achieve consistent burden reduction effects
3Object-generated harmful factors
If oscillation amplitude is increased to ensure chip shredding in arbitrary oscillation direction, then chip shredding is achieved, but machine tool burden increases
Solution Approach 1:
The patent optimizes the oscillation amplitude parameter by calculating the minimum necessary amplitude for effective chip shredding in the determined oscillation direction. Rather than using large amplitudes to ensure chip shredding, the system calculates and applies the precise amplitude needed, thereby achieving chip shredding while minimizing machine tool burden
Data Source
AI summary
The present invention is to provide a control device for a machine tool that performs oscillating cutting and that enables loads on a machine tool to be versatilely reduced without depending on the configuration of the machine tool. The present invention provides a control device 1 for a machine tool that performs oscillating cutting by causing a tool T and a workpiece W to oscillate relative to each other, the control device 1 including a cutting edge angle acquiring unit 12 that acquires a cutting edge angle θ1 of the machine tool T, an oscillating amplitude calculating unit 13 that calculates an oscillating amplitude required for chipping in any oscillating direction on the basis of the cutting edge angle θ1 of the tool T, an oscillating direction determining unit 14 that determines an oscillating direction on the basis of a calculation result from the oscillating amplitude calculating unit 13, and an oscillating operation control unit 15 that controls, on the basis of machining conditions, an oscillating operation in the oscillating direction determined by the oscillating direction determining unit 14.