Laser Cutting Separation Check for Incomplete Part Release
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Solution Overview
Problem
Existing cutting technologies face challenges in ensuring complete separation of workpiece parts from residual parts, leading to interference contours that can damage machinery and disrupt the cutting process.
Innovation Solution
A method and machine that utilize a machining jet, such as a laser beam, to check for incomplete separation by adjusting the intensity of the processing beam at a test position within the cutting contour, ensuring complete separation without re-cutting, using a cutting gas beam to gently dislodge the workpiece part if incomplete, and employing sensors to detect radiation interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cutting process is performed without verification, then productivity is maintained, but reliability deteriorates due to incomplete separation causing interference contours
Solution Approach 1:
The patent implements a feedback mechanism by using sensors to detect whether the workpiece part has been completely separated from the residual part after cutting. The detection unit monitors the cutting result and provides feedback to the control unit, which then determines whether verification cutting is necessary. This closed-loop feedback system ensures reliable separation verification while avoiding unnecessary re-cutting operations that would reduce productivity.
2Reliability
If verification cutting is performed to ensure complete separation, then reliability is improved, but productivity deteriorates due to additional cutting operations
Solution Approach 1:
The patent applies partial action by performing verification cutting only when necessary. The control unit evaluates the detection signal to determine whether the workpiece part is completely separated. Verification cutting is executed only when the evaluation indicates incomplete separation, rather than performing it unconditionally on every workpiece. This selective approach minimizes additional machining time while ensuring reliability when needed.
3Speed
If high intensity beam is used for cutting, then cutting speed is improved, but harmful factors increase due to potential damage to residual parts
Solution Approach 1:
The patent implements dynamic control of the processing beam intensity. The control unit adjusts the beam intensity based on the cutting phase and detection results. During verification cutting, the beam intensity is reduced compared to the main cutting operation. This dynamic adjustment allows the system to maintain high cutting speed during the primary cutting phase while minimizing damage to the residual workpiece during verification, thus reducing harmful factors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures reliable and safe separation of workpiece parts from residual parts, preventing interference contours and minimizing damage to machinery by avoiding re-cutting and ensuring precise control over the cutting process.
Implementation Method 1
employing sensors to detect radiation interactions
Implementation Method 2
using a cutting gas beam to gently dislodge the workpiece part if incomplete
Data Source
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Figure 3~4b
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AI summary
The invention relates to a method for cutting a workpiece (2), comprising the steps: cutting the workpiece (2) along a predefined cutting contour (18a) in order to separate a workpiece part (17) from an offcut part (19), and checking whether the workpiece part (17) has been completely separated from the offcut part (19) during the cutting process. In one aspect of the invention, the workpiece (2) is re-cut along an additional cutting contour (18b) that is laterally offset to the predefined cutting contour (18a), if the check establishes that the workpiece part (17) has not been completely separated from the offcut part (19). In a further aspect, the check whether the workpiece part (17) has been separated from the offcut part (19) comprises the following steps: irradiating the workpiece (2) with a preferably pulsed machining beam (3) at a check position inside the predefined cutting contour (18a); detecting radiation generated by the interaction of the machining beam (3) and the workpiece (2); and evaluating the detected radiation in order to check whether the workpiece part (17) has been completely separated from the offcut part (19) during the cutting process, wherein the intensity of the machining beam (3) at the check position is increased during the irradiation with the machining beam (3) and the irradiation with the machining beam (3) is stopped as soon as the check determines that the workpiece part (17) has not been completely separated from the offcut part (19) during the cutting process. The invention also relates to an associated machine for cutting a workpiece (2).