Laser Strip Processing With Continuous Web Indexing
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Solution Overview
Problem
Laser processing methods, particularly 'step and repeat' operations, are inefficient due to prolonged downtime and higher costs compared to conventional processing, especially when dealing with web materials requiring slower processing modes for tight tolerances or patterned cuts.
Innovation Solution
A method involving a laser processing system that supports a moving web on a movable table with a secondary motion system, allowing for simultaneous indexing and pausing of the web to alternate laser processing between strips, combined with high-speed beam switching between scanners, to achieve continuous 'step and repeat' processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If step and repeat mode is used for laser processing web material, then manufacturing precision is improved, but productivity deteriorates due to constant stopping and starting
Solution Approach 1:
The web is pre-indexed to precise positions using a secondary motion system before laser processing begins. This preliminary positioning allows the laser to process each strip without stopping the web, eliminating the need for repeated stopping and starting while maintaining tight tolerances through accurate pre-positioning
Solution Approach 2:
The system maintains continuous web motion throughout the laser processing operation. The secondary motion system continuously indexes the web to the next position while the laser processes the current strip, ensuring the web never stops moving and the laser operation is uninterrupted, thereby maintaining both precision and productivity
2Productivity
If web is indexed and table retracted simultaneously, then productivity is improved, but device complexity increases
Solution Approach 1:
The motion system is segmented into two independent subsystems: a primary motion system that moves the entire table assembly, and a secondary motion system that indexes only the web. This segmentation allows simultaneous operation of both systems without interference, enabling the web to be indexed while the table is retracted, thereby increasing throughput while managing complexity through functional separation
Solution Approach 2:
The system operates in two independent motion dimensions simultaneously: the table moves in one dimension (retraction/extension) while the web indexes in another dimension (lateral positioning). This multi-dimensional approach allows both operations to occur concurrently without mechanical interference, improving productivity while distributing system complexity across independent motion axes
3Productivity
If dual web system is implemented for alternating processing, then productivity is improved by 400%, but device complexity increases significantly
Solution Approach 1:
Two web processing systems are merged into a single integrated platform sharing common infrastructure including the laser source, control system, and primary table motion. Each web has its own secondary indexing mechanism, but both webs utilize the same laser beam and control architecture. This merging achieves the 400% productivity increase while minimizing added complexity by eliminating redundant systems
Solution Approach 2:
The laser system and table assembly are designed with universal multi-functionality to handle either one web or two webs simultaneously. The same laser beam can process either web, the same table can support both webs, and the control system can manage either single or dual web operations. This universality enables the productivity boost from dual web processing without requiring completely separate dedicated systems for each web
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
Significantly increases throughput by up to 400% while maintaining efficiency and reducing downtime, achieving continuous laser processing of web materials with improved productivity and cost-effectiveness.
Implementation Method 1
laser processing a plurality of parts during a first pass of the moving web below a laser beam
Implementation Method 2
portions of the web need to be removed and/or tight tolerances are required. In this mode of operation, the web is typically advanced over a tooling template with cut out portions that allow the desired portions of the web to be laser processed and evacuated into a vacuum system through the cut outs in the template
Data Source
AI summary
System and method of laser processing a section of web, or “strip” in a “step and repeat” manner while doing so with a continuously moving web during laser processing. The combination of continuous laser processing with a step and repeat manner of cutting parts from the strip, increases throughput for parts. The method includes retracting and indexing a web between passes of continuous laser processing of the web of material and alternating laser processing between two webs in a dual web system further increases throughput results from laser processing.