Laser Beam Vibration Control for Precise Sheet Metal Corners
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Solution Overview
Problem
Laser machining apparatuses struggle to cut sheet metal corners with high precision when vibrating the laser beam in a predetermined pattern, leading to potential machining defects.
Innovation Solution
A laser machining apparatus and method that incorporates a moving mechanism, a beam vibrating mechanism, and a vibration control section to progressively adjust the amplitude of the vibration pattern as the machining head approaches and moves away from the corner portion, allowing for precise cutting of sheet metal corners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the laser beam is vibrated in a predetermined vibration pattern during sheet metal cutting, then the cutting efficiency and surface quality are improved, but the corner portion cannot be cut with high precision and machining defects occur
Solution Approach 1:
The patent applies dynamics by making the vibration amplitude variable rather than constant. The vibration control section dynamically adjusts the amplitude based on the machining head position relative to the corner portion, transitioning from a fixed vibration pattern to an adaptive one that responds to changing geometric conditions during cutting
Solution Approach 2:
The patent changes the vibration parameter (amplitude) as a function of position. By modifying the vibration amplitude according to the distance from the corner portion, the system adapts the cutting process parameters to maintain precision at critical locations while preserving efficiency in other areas
2Manufacturing precision
If the laser beam vibration amplitude is reduced progressively from the first position to the corner portion, then the corner cutting precision is improved, but the vibration control complexity increases
Solution Approach 1:
The patent implements feedback control where the vibration control section continuously monitors the machining head position and adjusts the vibration amplitude accordingly. This closed-loop control uses position information to modulate vibration parameters, ensuring precision at corners while automating the complexity management
Solution Approach 2:
The system performs preliminary action by pre-programming the vibration amplitude reduction schedule based on the known corner position. The vibration amplitude is gradually reduced before reaching the corner and maintained at a low level during corner machining, preparing the cutting conditions in advance to ensure precision
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
Enables high-precision cutting of sheet metal corners by dynamically controlling the laser beam's vibration amplitude, ensuring accurate production of products with corner features.
Implementation Method 1
a beam vibrating mechanism configured to vibrate the laser beam for irradiation on the sheet metal in a predetermined vibration pattern
Implementation Method 2
Laser machining apparatuses that cut sheet metals by laser beams emitted from laser oscillators
Data Source
AI summary
A moving mechanism relatively moves a machining head emitting a laser beam, with respect to a sheet metal along a surface of the sheet metal. A beam vibrating mechanism vibrates the laser beam for irradiation on the sheet metal in a predetermined vibration pattern, while the machining head is relatively moved by the moving mechanism. A vibration control section controls the beam vibrating mechanism to progressively reduce an amplitude of the vibration pattern from a first position to a corner portion when the machining head moves toward the corner portion and reaches the first position before the corner portion by a predetermined distance, and progressively increase the amplitude of the vibration pattern until the machining head reaches a second position ahead of the corner portion by the predetermined distance from the corner portion, at a time of producing a product having the corner portion.