Curved-Surface Die Tool Selection Using Curvature-Based NC Parameters
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Solution Overview
Problem
Current machining methods for multi-curved surfaces using curved-surface compound die tools are inefficient due to the need for manual setting of machining conditions and difficulty in selecting tools with suitable radii of curvature and diameters, leading to labor-intensive and time-consuming processes.
Innovation Solution
A tool selection device and NC program creation system that analyze the machining region's shape and curvature information to determine feed and pick feed directions, creating parameter information for selecting appropriate tools based on minimum and maximum radii of curvature, corner curvature, and fillet portion characteristics, ensuring tools with suitable blade shapes are chosen for efficient machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual setting of machining conditions is used for curved-surface compound die tools, then operator control over machining parameters is maintained, but labor time and complexity increase significantly
Solution Approach 1:
The system performs self-service by automatically analyzing the machining region's shape data, determining curvature parameters, and selecting appropriate tools without operator intervention. The tool selection device independently completes the entire workflow from shape analysis to tool recommendation, eliminating manual labor while maintaining optimal machining conditions
Solution Approach 2:
The patent replaces the manual mechanical process of tool selection with an automated computational system. The tool selection device uses computer-based algorithms to analyze shape data and calculate curvature parameters, substituting human operator judgment with automated mechanical-computational analysis
2Productivity
If curved-surface compound die tools are used for multi-curved surfaces, then machining capability is improved, but difficulty in selecting appropriate tools increases
Solution Approach 1:
The tool selection device acts as an intermediary between the machining requirements and the tool selection process. It mediates by automatically analyzing shape data, calculating curvature parameters (Rmin, Rmax), and matching these parameters with appropriate tool specifications, thereby simplifying the complex selection process
Solution Approach 2:
The system transforms the complex qualitative assessment of tool suitability into quantitative parameter-based selection. By extracting specific curvature parameters (minimum radius of curvature, maximum radius of curvature) from the machining region and matching them with tool parameters, the system converts complex selection into a systematic parameter-matching process
3Manufacturing precision
If multiple tools are selected for different machining regions, then machining precision is improved, but number of tools and setup complexity increase
Solution Approach 1:
The system segments the machining region into multiple sub-regions based on curvature characteristics, allowing different tools to be assigned to different segments. This segmentation enables precise matching of tool parameters to specific machining requirements while maintaining systematic control over the overall machining process
Data Source
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AI summary
The purpose of the present invention is to easily select a curved-surface compound die tool that is appropriate for machining of a structural model having a double curved surface. A tool selection unit (21) has an analysis unit (211) and a selection unit (212). The analysis unit (211) determines a pick feed direction and the feed direction of a tool on the basis of information relating to the shape of a machining region including a double curved surface or a machining surface in the machining region, and creates parameter information in which at least a value relating to the smallest curvature radius in the machining surface and a value relating to the largest curvature radius in the pick feed direction are recorded. The selection unit (212) selects a tool to use for machining the machining region on the basis of the parameter information, from among a plurality of tools having a bottom cutting edge formed in a curved-surface shape and a side cutting edge formed in a curved-surface shape having a curvature radius different from the curvature radius of the curved surface of the bottom cutting edge.