NC Program Conversion Using Machine Stiffness for Machining Accuracy
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Solution Overview
Problem
When a cutting target workpiece is machine-processed using an NC machine tool, the processing accuracy may not be maintained when the NC program tuned for one machine is used on another machine, due to differences in machine stiffness and tool characteristics.
Innovation Solution
A method for converting an NC program used in one processing machine to another by receiving information about the stiffness of the destination machine or toolset, and performing a conversion process to adapt the program for the new machine, ensuring appropriate processing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an NC program tuned for a certain NC machine tool is used as is for controlling another NC machine tool, then the ease of operation is improved, but the manufacturing precision deteriorates
Solution Approach 1:
The system changes parameters of the NC program based on stiffness information of the destination machine tool and toolset. By receiving stiffness data and automatically adjusting program parameters, the system maintains manufacturing precision across different machines while preserving ease of operation through automated adaptation.
2Manufacturing precision
If the NC program is tuned according to the NC machine tool used actually, then the manufacturing precision is improved, but the adaptability deteriorates
Solution Approach 1:
The conversion system provides universal functionality by enabling NC programs to be adapted across different machine tools. By implementing automated conversion based on stiffness information, the system makes the NC program tuning process applicable to multiple machines, thereby improving adaptability while maintaining the precision benefits of machine-specific tuning.
Solution Approach 2:
The system dynamically changes program parameters based on destination machine characteristics. This allows a single tuned program to be systematically adapted to different machines through parameter adjustment, combining the benefits of machine-specific optimization with cross-machine adaptability.
3Manufacturing precision
If trial cutting is performed to correct feed rate, then the manufacturing precision is improved, but the loss of time increases
Solution Approach 1:
The system performs preliminary action by obtaining stiffness information before actual machining and using this data to pre-calculate appropriate program parameters. This eliminates the need for time-consuming trial cutting while maintaining manufacturing precision, as the conversion system prepares optimized parameters in advance based on machine characteristics.
Solution Approach 2:
The system replaces the mechanical trial-cutting process with a computational conversion system. By substituting physical trial cutting with automated parameter conversion based on stiffness data, the system achieves the same precision improvement without the time loss associated with iterative trial cutting.
Data Source
AI summary
The present invention makes it possible to convert an NC program used for one processing into an NC program capable of securing appropriate processing accuracy in another processing machine. Provided is an NC program conversion process method by a conversion system which converts a conversion source NC program for executing a processing in a conversion source processing machine into a conversion destination NC program for executing a processing in a conversion destination processing machine, wherein an input of information relating to (1) stiffness of the conversion destination processing machine or (2) stiffness of the tool included in a conversion destination toolset is received, and on the basis of the received information relating to the stiffness, a conversion source NC program 1424 is converted into a conversion destination NC program 1425.