CNC Device Safe Restart Path Calculation and Switching
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Solution Overview
Problem
Existing numerical control devices require time-consuming and complex restart procedures, especially for large-scale programs and complicated workpieces, due to the need for manual intervention to avoid interference during automatic operation approaches, and lack warnings for potential tool-workpiece interference during automatic restarts.
Innovation Solution
A numerical control device with an approach path calculation unit, manual operation approach command unit, and approaching operation switching unit that allows switching between automatic and manual operation approaches, calculates a safe path along the tool axis direction, and defines an approach region to ensure safe tool movement and output warnings for unsafe positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automatic operation approach is used to move the tool directly to the restarting machining point, then the restart operation is faster and more efficient, but there is a risk of interference between the tool and the workpiece or machinery members
Solution Approach 1:
The system performs preliminary actions by calculating a safe approach path before executing the automatic operation approach. The approach path calculation unit determines whether the direct path from the current position to the restarting machining point is safe, and if not, calculates an alternative path that avoids interference with the workpiece or machinery members.
2Reliability
If manual operation approach is used to avoid interference during tool movement, then safety is improved, but the restart procedure becomes more complex and time-consuming
Solution Approach 1:
The system performs self-service by automatically calculating and determining the approach path without requiring operator intervention. The approach path calculation unit autonomously evaluates the safety of the direct approach path and calculates alternative paths when necessary, eliminating the need for operators to manually plan avoidance routes while maintaining safety.
3Reliability
If the system requires visual checking and manual operation for complicated workpieces, then interference can be avoided, but the restart process becomes slower and more complicated
Solution Approach 1:
The system replaces the mechanical system of visual checking and manual operation with an automated computational system. The approach path calculation unit uses computer-based algorithms to automatically determine safe approach paths, substituting the operator's visual inspection and manual control with automated path planning that is both faster and more reliable.
4Device complexity
If the numerical control device does not check detailed positional relations during automatic operation approach, then the operation is simpler, but the device cannot output warnings when interference may occur
Solution Approach 1:
The system implements feedback by having the approach path calculation unit continuously evaluate the positional relationship between the tool and the workpiece or machinery members during the automatic operation approach. This feedback mechanism provides real-time information about potential interference risks, enabling the system to output warnings or adjust the approach path as needed.
Data Source
AI summary
A numerical control device includes an approach path calculation unit configured to calculate an approach path to the restarting machining point of the tool, a manual operation approach command unit, and an approaching operation switching unit, wherein the approaching operation switching unit is configured to receive switching request from an operator during the manual operation approach and switch to the automatic operation approach, or, receive manual intervention of the operator during the automatic operation approach and switch to the manual operation approach.