Numerical Controller for Skiving Tool Path Automation
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Solution Overview
Problem
Conventional numerical controllers require manual calculation of tool paths for skiving machining, making it difficult for operators to achieve desired shapes like circular arcs without distortion during machining.
Innovation Solution
A numerical controller that automatically calculates and controls the tool path and speed based on cutting point path, speed, tool angle, and block progress rate, allowing for precise specification of movement paths for circular arc shape machining and other shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual calculation of tool path is used for skiving machining, then operator control over cutting path is maintained, but operator burden increases and machining complexity increases
Solution Approach 1:
The numerical controller automatically calculates the tool path based on the cutting path specified in the machining program, eliminating the need for manual calculation by the operator. The control unit performs automatic tool path computation using the relationship between cutting path and tool movement path, thereby reducing operator burden while maintaining precise control.
2Ease of operation
If automatic tool path calculation is implemented, then operator burden is reduced, but distortion in cutting path occurs during circular arc machining
Solution Approach 1:
The numerical controller continuously monitors the block progress rate during machining and dynamically adjusts the tool path calculation based on actual machining progress. This feedback mechanism ensures that the tool path is accurately computed considering the real-time machining state, thereby preventing distortion in circular arc cutting paths while maintaining automatic calculation benefits.
Solution Approach 2:
The system dynamically adapts the tool path calculation by incorporating the block progress rate into the computation process. Instead of using a static calculation method, the controller adjusts the tool path in real-time based on machining progress, ensuring accurate cutting path formation during circular arc machining while maintaining operator convenience.
3Ease of manufacture
If conventional skiving machining control is used, then simple linear cutting paths are achieved, but complex shapes like circular arcs cannot be machined accurately
Solution Approach 1:
The numerical controller changes the calculation parameters by incorporating the block progress rate into the tool path computation. This parameter change enables the system to accurately compute tool paths for complex shapes like circular arcs, thereby expanding machining capability while maintaining shape accuracy that was previously unachievable with conventional linear path control.
Data Source
AI summary
A numerical controller capable of automatically calculating a tool path based on a command of a cutting path in skiving machining includes a command analysis unit that determines whether a block read from a machining program corresponds to a skiving machining command, a skiving machining command data calculation unit that calculates a path and a feed speed of a tool based on a path of a cutting point and a feed speed of the cutting point commanded by the skiving machining command when the command analysis unit determines that the block corresponds to the skiving machining command, and an interpolation unit that calculates interpolation data according to a progress rate of the block during actual machining based on the path of the tool calculated by the skiving machining command data calculation unit and a coordinate value during actual machining.