Cutting Tool Diameter Selection for High-Speed Machining
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Solution Overview
Problem
Increasing cutting speed in machining leads to improved efficiency but shortens tool life, resulting in frequent tool changes and increased costs, making it difficult to achieve high-efficiency machining without reducing tool life.
Innovation Solution
A machining condition determining apparatus that adjusts tool diameter and number of revolutions based on the cutting speed, using the equation Vc=π×D×n, to maintain cutting efficiency without shortening tool life, and a cutting tool selecting apparatus that selects tools with optimal diameters for improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cutting speed is increased to improve cutting efficiency, then productivity is improved, but tool life is shortened
Solution Approach 1:
The invention changes the parameters of the cutting tool system by adjusting both the tool diameter and the number of revolutions of the drive motor. By modifying these parameters while maintaining a constant cutting speed (Vc = π × D × n), the system achieves improved cutting efficiency without shortening tool life. Specifically, using a larger tool diameter with correspondingly lower revolutions allows for higher material removal rates while keeping the cutting speed at optimal levels for tool longevity.
2Loss of time
If cutting speed is increased to shorten machining time, then productivity is improved, but tool change frequency increases leading to increased tool cost
Solution Approach 1:
The invention simultaneously changes the tool diameter and drive motor revolutions to maintain optimal cutting speed while improving material removal rate. This approach reduces total machining time without increasing tool change frequency, thereby reducing both time loss and tool consumption costs.
3Productivity
If tool diameter is increased to improve cutting efficiency, then productivity is improved, but the required number of revolutions must be reduced to maintain cutting speed
Solution Approach 1:
The invention deliberately changes both tool diameter and number of revolutions as a coordinated pair of parameters. By increasing tool diameter and simultaneously reducing revolutions while maintaining constant cutting speed (Vc = π × D × n), the system achieves higher productivity through larger material removal per revolution, while the reduced revolution count compensates for the larger diameter to maintain optimal cutting conditions.
Data Source
AI summary
A machining condition determining apparatus (1) includes a first setter (2a) setting a cutting speed of a cutting tool, a storage (3) storing a maximum output value of a drive motor rotating a spindle holding the cutting tool and a number of revolutions of the drive motor corresponding to the maximum output value, a number-of-revolutions determiner (4) obtaining a steady-state value of the maximum output value of the drive motor stored in the storage (3) and determining a number of revolutions of the drive motor corresponding to the obtained steady-state value of the maximum output value, and a tool-diameter determiner (5) calculating a tool diameter of the cutting tool based on the cutting speed set by the first setter (2a) and the number of revolutions of the drive motor determined by the number-of-revolutions determiner (4).