Multi-Spindle CNC Coordinate System Selection
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Solution Overview
Problem
Conventional numerical control devices require operators to perform multiple operations when switching between machining surfaces with different normal vectors, including changing tool attitude and selecting a suitable coordinate system, which is time-consuming and labor-intensive.
Innovation Solution
A numerical control device for multi-spindle machine tools with a rotation axis, equipped with a command-position generating unit, coordinate-system selecting unit, coordinate-value changing unit, and coordinate transforming unit, automatically selects a suitable coordinate system based on the tool attitude and rotation axis angle, simplifying the process of machining surfaces with different normal vectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an operator manually selects and designates a coordinate system when switching machining surfaces, then the machining process can be controlled accurately, but the operator time and labor increase significantly
Solution Approach 1:
The numerical control device automatically selects and designates the appropriate coordinate system based on the current machining surface information, eliminating the need for manual operator intervention. The system serves itself by autonomously determining which coordinate system to use, thereby reducing operator time and labor while maintaining machining control accuracy
Solution Approach 2:
The system pre-establishes multiple coordinate systems corresponding to different machining surfaces in advance. When switching between surfaces, the control device automatically retrieves and designates the pre-prepared coordinate system information, avoiding the need for operators to manually select and set up coordinate systems during the machining process
2Adaptability or versatility
If multiple preset coordinate systems are provided for different machining surfaces, then the system can handle various surface orientations, but the complexity of coordinate system management increases
Solution Approach 1:
The numerical control device incorporates a universal coordinate system management mechanism that can handle multiple coordinate systems through a single automated selection process. The system universally applies the same automatic designation logic across all machining surfaces, regardless of their orientation, thereby providing adaptability to various surface orientations without proportionally increasing management complexity
3Ease of operation
If the operator performs both tool attitude adjustment and coordinate system selection, then complete control over the machining process is achieved, but the operational complexity and time consumption increase
Solution Approach 1:
The system merges the coordinate system selection function with the tool attitude adjustment process. When the operator adjusts the tool attitude for a new machining surface, the control device automatically and simultaneously designates the corresponding coordinate system, combining what were previously two separate operations into one integrated action, thereby reducing time consumption while maintaining complete process control
Data Source
AI summary
A numerical control device according to the invention is a numerical control device for a multi-spindle machine tool including a rotation axis and controlling a tool attitude relative to a machining workpiece, including a first storage device capable of recording a machining program; a second storage device capable of storing coordinate systems; and a central processing unit capable of executing the machining program, selecting a coordinate system suitable for machining from among the coordinate systems stored in the second storage device based on the tool attitude set by the machining program or an external input, and outputting data for machining the workpiece on the selected coordinate system.