Stamping-Laser Coordinate Offset Compensation for Sheet Processing
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Solution Overview
Problem
Combined stamping-laser machines face challenges in accurately determining and compensating for the offset between stamping and laser coordinates due to manufacturing tolerances, thermal expansions, and mechanical deformations, leading to errors in processing metal sheets.
Innovation Solution
A method is introduced to automatically determine and correct the offset by introducing a structure into the workpiece using either the stamping or laser device, measuring its position, comparing it to an expected position, and adjusting the coordinates of the stamping or laser device to compensate for the offset, utilizing optical measuring methods such as detection light beams and reflected light barriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment method is used to compensate for offset, then the machine can operate with simple equipment, but the determination of offset measure is complicated and susceptible to errors
Solution Approach 1:
The system performs self-measurement and self-correction of the offset. The stamping device or laser device introduces a structure into the workpiece, then the same or other device measures the actual position of this structure and automatically calculates and applies the offset compensation, eliminating the need for manual measurement and adjustment by the operator.
Solution Approach 2:
The patent replaces manual mechanical measurement and adjustment methods with an automated measurement and calculation system. The system uses coordinate data from the processing device and actual position data from measurement to computationally determine the offset and automatically adjust the coordinate system, substituting human operation with automated computational processes.
2Productivity
If manual offset compensation is performed, then the equipment remains simple, but the processing time increases due to complicated manual adjustment
Solution Approach 1:
The system automatically performs the entire offset compensation process without requiring operator intervention. The device introduces a measurement structure, measures its position, calculates the offset, and applies compensation automatically, significantly reducing the time required compared to manual methods while maintaining equipment simplicity.
3Manufacturing precision
If offset compensation is not performed accurately, then the process remains simple, but errors occur in the assignment of laser processing to stamping processing
Solution Approach 1:
The system introduces a measurement structure into the workpiece, measures its actual position using the processing device's own coordinates, compares this with the expected position, and uses this feedback information to calculate and apply the correct offset compensation. This closed-loop feedback mechanism ensures high precision in coordinate assignment.
Solution Approach 2:
The patent replaces complex mechanical alignment procedures with an automated computational approach. The system uses coordinate data from the processing device and actual measurement data to computationally determine the offset and automatically adjust the coordinate system, eliminating the need for complex manual alignment operations.
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
This method allows for rapid, accurate, and error-free compensation of the offset, improving the precision and efficiency of processing metal sheets by automating the offset correction process, reducing manual intervention and susceptibility to errors.
Implementation Method 1
heat input from the laser radiation
Implementation Method 2
thermal expansions of the mechanisms, collisions, manufacturing tolerances for different cutting heads, ageing, and a possible thermal expansion of the processed workpieces over the processing duration, in particular owing to a heat input from the laser radiation
Data Source
AI summary
A method for recognition and compensation of an offset measure between stamping coordinates of a stamping device and laser coordinates of a laser device in a combined stamping-laser machine for processing a plate-shaped workpiece, particularly a metal sheet, includes introducing a structure into the plate-shaped workpiece by respectively using the stamping device or the laser device. A measurement variable of the introduced structure is determined respectively by the laser device or the stamping device. The measurement variable is compared with an expected variable, and a deviation of the measurement variable from the expected variable corresponds to an offset measure. The offset measure is balanced with the coordinates of the laser device in the laser coordinate system or with the coordinates of the stamping device in the stamping coordinate system in order to compensate for the offset measure between the stamping coordinates and the laser coordinates.