Laser Panel Marking for Precise Formability Measurement
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Solution Overview
Problem
Current methods for measuring formability in metal panels, such as those used in the automotive industry, rely on caustic chemical etching, which is hazardous, time-consuming, and operator skill-dependent, leading to inaccuracies and increased manufacturing delays.
Innovation Solution
A system and method for laser etching metal or plastic substrates to apply patterns like QR codes and dot patterns autonomously or manually, using a laser to mark panels for strain and formability measurements, eliminating the need for caustic chemicals and improving precision and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If caustic chemical etching is used to apply circle patterns for formability measurement, then the measurement capability is achieved, but the process becomes hazardous, time-consuming, and operator skill-dependent
Solution Approach 1:
The patent replaces the chemical etching system with a laser-based marking system. Instead of using caustic chemicals to etch circle patterns onto metal panels, the invention uses a laser to directly mark or print the patterns onto the panel surface. This substitution eliminates all chemical hazards, operator exposure risks, and the need for chemical handling, storage, and disposal procedures while maintaining the capability to create precise measurement patterns for formability analysis
Solution Approach 2:
The patent changes the fundamental parameter of the marking process from chemical-based to energy-based (laser). By transitioning from chemical etching to laser marking, the process parameters change from chemical concentration, temperature, and exposure time to laser power, pulse duration, and scanning speed. This parameter change enables automated, precise, and repeatable pattern application without the harmful effects of chemicals
2Measurement precision
If electro-chemical etching process is used to create circle patterns, then strain measurement capability is achieved, but the process time increases and productivity decreases
Solution Approach 1:
The patent applies the circle patterns directly onto the metal panels before they enter the forming press, using a laser marking system that can quickly and accurately deposit the measurement patterns in advance. This preliminary action eliminates the need for post-formation chemical etching, allowing panels to be immediately prepared for formability measurement without waiting for chemical reactions to complete, thereby significantly reducing cycle time and increasing productivity
Solution Approach 2:
The patent replaces the slow electro-chemical etching process with a rapid laser marking system. The laser can instantly create the required circle patterns on panel surfaces without the time-consuming chemical reactions, electrolyte application, and cleaning steps associated with electro-chemical etching. This substitution reduces pattern application time from minutes or hours to seconds, dramatically improving throughput
3Manufacturing precision
If manual chemical etching is performed by operators, then pattern application is achieved, but operator skill dependency leads to inaccuracies
Solution Approach 1:
The patent implements an automated laser marking system that performs the pattern application independently without requiring operator intervention during the actual marking process. The system uses pre-programmed parameters, automated positioning, and computer-controlled laser delivery to consistently produce accurate circle patterns. This self-service capability eliminates variability introduced by manual operations, ensuring uniform pattern quality regardless of operator skill level
Solution Approach 2:
The patent replaces manual chemical etching operations with an automated laser marking system controlled by computer software. Instead of relying on operators to manually apply chemicals and control etching parameters, the system uses automated laser scanning, precise motion control, and digital parameter management. This substitution eliminates human error and skill dependency, providing consistent, repeatable, and highly accurate pattern application
4Manufacturing precision
If caustic chemicals and cleaners are used for etching and surface treatment, then the circle pattern is created, but waste generation and environmental impact increase
Solution Approach 1:
The patent replaces the entire chemical-based etching and cleaning system with a laser marking system. Instead of using caustic chemicals to create patterns and subsequent cleaners to remove residues, the laser directly marks the patterns onto the panel surface through controlled material removal or coloration. This substitution eliminates all chemical waste streams, including etchant solutions, rinse waters, and contaminated cleaning agents, resulting in zero chemical waste generation while maintaining pattern quality
Solution Approach 2:
The patent extracts and removes all chemical substances from the pattern application process. By using laser energy instead of chemical reactions, the invention completely eliminates the need for etching chemicals, electrolytes, and cleaning agents. This extraction of chemicals from the process eliminates the associated waste generation, environmental contamination, and disposal requirements while preserving the functional outcome of creating accurate measurement patterns
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
The laser etching system provides accurate, reliable, and expedited formability measurements, reducing labor and chemical exposure risks while enhancing safety and reducing waste, allowing for precise deformation analysis even under high-temperature processes like welding.
Implementation Method 1
A method for laser etching a substrate surface to apply a pattern thereon, including autonomously marking a panel
Data Source
AI summary
A method, system and devices for autonomous marking of a substrate and for conducting formability measurements. The method, system and devices may be used to apply markings to a substrate, such as panels that are used to construct articles. The panels, for example, may be automobile panels. The markings preferably are applied on the panel autonomously with a laser etching, and with robot device that is controlled to form a precise pattern of indicia (e.g., dots), on the panel surface. An x, y, z, gantry coordinate system may be used to guide the operations of the robot device to position the device for etching at precise locations on the substrate surface. Once etched, the panels may be processed, such as, by stamping or cutting, and the deformation of the dot pattern may be used to determine strain and formability properties.