Workpiece Mounting Adjustment to Prevent Machine Tool Stroke-Over
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Solution Overview
Problem
Existing machine tool control systems face difficulties in smoothly processing workpieces due to stroke-over issues, where the tool's movement exceeds the machine's movable range, leading to incomplete processing and potential damage to the workpiece.
Innovation Solution
A workpiece-attachment-information reporting device that sets a movable range for the machine tool, calculates the operating range based on the workpiece's mounting position and posture, and reports the target mounting posture to ensure the operating range is within the machine's movable range, thereby avoiding stroke-over.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tool is made to retract to avoid stroke-over, then stroke-over is prevented, but the ability to smoothly process the entire area of the workpiece is compromised
Solution Approach 1:
The system performs preliminary calculation of the operating range based on the tool path and workpiece mounting position/posture before actual machining. By computing the required movement range in advance and comparing it with the machine's movable range, the system can determine appropriate workpiece mounting adjustments before machining begins, preventing stroke-over without needing to retract the tool during processing.
Solution Approach 2:
Instead of adjusting the tool position in the vertical dimension (retraction), the system shifts the problem to the workpiece mounting position and posture dimensions. By calculating and reporting the target mounting position/posture that ensures the operating range fits within the movable range, the solution moves from vertical tool adjustment to horizontal workpiece positioning, enabling complete area processing without stroke-over.
2Ease of operation
If the workpiece mounting position or posture is not optimized, then setup is simpler, but stroke-over occurs leading to processing failures
Solution Approach 1:
The system provides feedback by calculating and reporting the target mounting position or posture based on the tool path and machine movable range. This feedback loop allows operators to adjust the workpiece mounting to the recommended position/posture, ensuring that the operating range will fit within the movable range while maintaining simple mounting procedures.
Solution Approach 2:
The system changes the parameters of workpiece mounting position and posture to optimize the operating range. By calculating the required movement range from the tool path and comparing it with the machine's movable range, the system determines the optimal mounting parameters that prevent stroke-over while keeping the mounting process straightforward.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A workpiece-attachment-information reporting device (10) is equipped with: a range-setting unit (13) for setting a movable range in a prescribed feed-shaft direction of a work machine; a position-orientation-setting unit (14) for setting the attachment position or orientation of a workpiece; a route-setting unit (12) for setting a tool route on the basis of the attachment position or orientation of a workpiece; a range calculation unit (15) for calculating the operational range in the prescribed feed-shaft direction of a work machine, given that the tool has moved relative to the workpiece along the tool route; a target-position-orientation calculation unit (16) for obtaining the target attachment position or orientation of the workpiece with the calculated operational range being within the movable range; and a reporting unit (6) for reporting the target attachment position or orientation.