Wobbling Laser Deburring for Reflective Burrs and Smooth Chamfers
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Solution Overview
Problem
Existing laser deburring methods face challenges such as sharp metal burrs reflecting laser radiation, requiring complex setups, and inefficiencies in removing large or deeply attached burrs, especially in industrial applications.
Innovation Solution
A wobbling high-energy laser beam is focused on one side of a workpiece, melting material within a radiation-affected zone to form a curved smooth chamfered edge, with controlled wobbling amplitude and speed to prevent beam propagation beyond the edge, using a modular system with a high-power laser source, wobbling laser head, and multi-axis robot for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a laser beam is used to remove burrs, then the process is non-contact and eliminates consumables, but sharp metal burrs reflect laser radiation reducing effectiveness
Solution Approach 1:
The patent applies dynamic wobbling motion to the laser beam instead of a static beam. The laser beam is made to oscillate or wobble during the deburring process, which allows the energy to be distributed across a wider area and prevents the beam from simply reflecting off the sharp burr edges. This dynamic approach enables effective heating and melting of burrs even when they are highly reflective, resolving the contradiction between process simplicity and removal effectiveness.
Solution Approach 2:
The laser beam is applied in a periodic wobbling pattern rather than a continuous static beam. This periodic motion creates cycles of heating and cooling that gradually melt and remove burrs. The oscillating beam allows repeated exposure to the same areas over time, accumulating thermal energy to overcome the reflective properties of sharp metal edges, thus maintaining reliability while keeping the non-contact advantage.
2Reliability
If contact deburring tools are used, then burrs can be removed effectively, but the tools experience wear and tear requiring frequent replacement
Solution Approach 1:
The patent replaces the mechanical contact deburring system with a laser-based thermal processing system. Instead of using physical tools that directly contact and mechanically remove burrs (which suffer from wear and consumable costs), the invention uses a laser beam to heat and melt the burrs. This substitution eliminates mechanical wear and the need for consumable tool replacements, while maintaining effective burr removal through thermal energy.
Solution Approach 2:
The laser beam acts as an intermediary between the energy source and the burr material. Rather than direct mechanical contact, the laser energy serves as a mediator that transfers thermal energy to the burrs, causing them to melt and vaporize. This intermediary approach allows effective burr removal without the wear and tear associated with direct mechanical tool contact.
3Productivity
If robotic systems are used for automated deburring, then productivity increases, but the system complexity and mechanical interference problems increase
Solution Approach 1:
The patent replaces complex mechanical robotic deburring systems with a simplified laser-based system. Instead of using robots with mechanical deburring tools that require precise path programming, force control, and coordination of multiple axes, the invention uses a laser beam that can be precisely directed and controlled with minimal mechanical complexity. The laser system maintains high productivity through automated beam control while eliminating the mechanical interference problems inherent in robotic mechanical systems.
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 effectively removes burrs and creates a smooth chamfered edge along the entire length of the workpiece, reducing operational complexity and consumable costs, while maintaining the structural integrity of the material.
Implementation Method 1
irradiating a side of a workpiece by a laser beam, thereby heating and melting material within a radiation-affected zone (RAZ) which either includes or terminates close to a sharp jugged edge
Implementation Method 2
The heat generated by the liquefied material is transferred to the edge so that the burrs are melted away
Implementation Method 3
heating and melting material within a radiation-affected zone (RAZ) which either includes or terminates close to the sharp jugged edge depending on a specified chamfer width
Implementation Method 4
The material within the RAZ is liquefied forming a molten pool
Implementation Method 5
A wobbling high-energy laser beam is focused on one side of a workpiece, melting material within a radiation-affected zone to form a curved smooth chamfered edge
Data Source
AI summary
The disclosed method for deburring and chamfering a burred sharp edge, which is defined between two transversely extending sides of workpiece, includes forming a molten pool of material on one of the sides by a laser beam which wobbles transversely to the burred edge. The wobbling amplitude of the laser beam is controlled so that the oscillating beam is prevented from being guided beyond the edge. The heat generated by the molten material is transferred to and liquefies the burrs. As the molten material cools and solidifies, it pools on the surface of the workpiece forming a raised smootcurved surface layer which chamfers the edge.


