Laser Scribe Chip Control for Machining
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Solution Overview
Problem
Current machining processes face issues with long or undesired chip lengths, leading to premature tool failure, equipment damage, part scrap, reduced optimization, operator injury, and excess capital equipment costs, as existing methods like specialized tooling and high-pressure cutting fluids are either costly or ineffective.
Innovation Solution
A pre-engineered interruption process using a laser or fluid jet, or a combination of both, is applied to the work piece to create engineered grooves that control chip lengths by introducing break points, allowing chips to sever during machining, thereby reducing stress on machine tools and eliminating the need for coolant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If specialized topography tooling is used to control chip length, then chip breakage is improved, but device complexity and capital equipment cost increase
Solution Approach 1:
The laser applies preliminary action by creating engineered interruptions or grooves on the workpiece surface before machining occurs. These pre-formed features serve as predetermined chip break points that guide chip formation and separation during subsequent machining operations, eliminating the need for complex specialized tooling geometry
Solution Approach 2:
The invention replaces the mechanical complexity of specialized topography tooling with a laser-based energy field system. Instead of designing complex mechanical cutting tool geometries to control chips, the laser creates optical/thermal fields that modify the workpiece surface topology, achieving chip control through non-contact energy application
2Reliability
If high pressure cutting fluid is applied to break chips, then chip control is improved, but operational safety and system complexity worsen
Solution Approach 1:
The laser system replaces the high-pressure fluid jet mechanical system with a non-contact optical/thermal energy system. The laser creates engineered surface interruptions that control chip breakage without requiring high-pressure cutting fluids, thereby eliminating the safety hazards associated with high-pressure jet systems while maintaining effective chip control
Solution Approach 2:
The invention extracts and removes the high-pressure cutting fluid system from the machining process entirely. By using laser-induced surface modifications to create chip break points, the process eliminates the need for cutting fluids, removing both the safety hazards and the complexity of fluid delivery systems
3Length of moving object
If scroll cutting is used to control chips, then chip length is reduced, but tool wear and machining time increase
Solution Approach 1:
The laser creates preliminary engineered interruptions on the workpiece surface that serve as predetermined chip break points. During machining, chips naturally break at these pre-formed locations, achieving short chip lengths without requiring the tool to perform additional scroll cutting passes that would extend machining time
Solution Approach 2:
The laser segments the continuous workpiece surface into discrete zones with engineered interruptions at specific locations. This segmentation creates natural chip break points that divide long chips into shorter segments during machining, achieving chip length control without the time-consuming scroll cutting process
4Reliability
If laser depth penetration is increased to maximize chip control, then chip breakage improves, but finish surface quality deteriorates
Solution Approach 1:
The laser applies local quality by creating engineered interruptions with controlled depth and geometry at specific locations on the workpiece surface. The laser parameters (power, speed, pulse duration) are locally optimized to create sufficient surface modification for chip control while maintaining the overall finish surface quality in non-affected areas
Solution Approach 2:
The laser applies partial action by creating surface interruptions with depth optimized for chip control rather than complete penetration. The engineered grooves are sufficiently deep to create effective chip break points but controlled to avoid excessive material removal or damage to the finish surface, achieving the minimum necessary action for chip control
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 approach results in shorter chip lengths, reduced tool wear, improved surface finish, easier recycling of scrap metal, and decreased operational complexity, as it eliminates the need for specialized tooling and high-pressure cutting fluids, while ensuring consistent and accurate depth control through Real Time Depth Measurement.
Implementation Method 1
applying a pre-engineered interruption process to the work piece to be machined using a laser beam
Implementation Method 2
applying a pre-engineered interruption process to the work piece to be machined using a Fluid Jet
Data Source
AI summary
A process is disclosed for controlling the length of chips or shavings on materials that is inherent to produce long undesired chips when machined. Based on the work piece configuration and surface area to machine a determined outlay and process application for a continuous scribe or arrangements of different scribe pattern or patterns for the part and or surface is selected to provide optimal chip control during the machining operation. Engineered Interruptions are applied to the work object prior to the machining operation to maximize optimal chip control. Controlling the depth of scribe of the laser is accomplished and managed through the interface of hardware, software and electronics.