Ventilation Device for Laser Cutting Metal Strip Dust
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Solution Overview
Problem
Existing metal cutting apparatuses face the challenge of cutting dust adhering to or welding with the underside of metal plates, requiring significant effort to remove the cutting dust from the cut metal plates.
Innovation Solution
Incorporating a ventilation device with support strips and a dust discharge shaft, which utilizes passive or active ventilation to prevent backflow and ensure complete removal of cutting dust into the dust collection device, thereby eliminating the need for manual removal from the metal plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a dust discharge shaft is used to remove cutting dust during laser cutting, then cutting dust removal is achieved, but cutting dust adheres to or welds with the underside of the metal plate
Solution Approach 1:
The patent applies preliminary anti-action by introducing a ventilation device that creates a controlled air flow in advance to counteract the harmful backflow of cutting dust toward the metal plate. The ventilation channels are positioned to preemptively establish a protective air current that prevents dust adhesion before it occurs, thereby resolving the contradiction between dust removal and dust adhesion prevention
Solution Approach 2:
The ventilation device acts as an intermediary element between the dust discharge shaft and the metal plate. It mediates the air flow dynamics by creating a controlled ventilation current that separates the dust removal function from the plate surface, allowing dust to be discharged without adhering to the plate underside
2Object-generated harmful factors
If cutting dust is removed through the discharge shaft, then dust collection is achieved, but backflow occurs in the direction of the underside of the cut metal plate
Solution Approach 1:
The ventilation channels are designed to create a preliminary counter-flow of air that opposes the backflow tendency of discharged dust. This pre-established air current acts as a protective barrier, ensuring that dust particles are directed away from the metal plate underside rather than flowing back toward it
Solution Approach 2:
The patent utilizes pneumatic principles by employing ventilation channels that generate controlled air flows. The air pressure and flow dynamics within these channels are designed to create a unidirectional current that prevents dust backflow while maintaining effective dust collection, resolving the reliability issue
3Object-affected harmful factors
If manual removal of cutting dust from metal plates is performed, then dust adhesion is addressed, but operational effort and time are significantly increased
Solution Approach 1:
The ventilation device enables the system to self-regulate dust adhesion prevention without requiring manual intervention. The automated air flow control through the ventilation channels continuously prevents dust accumulation on the metal plate underside, eliminating the need for manual dust removal operations and maintaining high productivity
Solution Approach 2:
The system performs preliminary action by preventing dust adhesion in the first place through the ventilation device, rather than requiring subsequent manual removal. The continuous air flow established by the ventilation channels proactively keeps the metal plate surface clean throughout the cutting process, thereby maintaining operational efficiency
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 ventilation system effectively prevents cutting dust from adhering to the metal plates, ensuring efficient and automated dust removal, reducing operational effort and ensuring continuous production with minimal dust accumulation.
Implementation Method 1
Passive ventilation involves sucking in air by the ventilation device. The air is sucked in, e.g., by a Venturi effect, which forms as a consequence of the cutting gas flow due to the cutting gas, which is directed in the discharging direction.
Data Source
AI summary
An apparatus for cutting metal plates out of a metal strip includes a laser cutting apparatus that is movable back and forth in a transport direction of the metal strip, and a support device for supporting the metal strip to be cut. The support device includes a first support device having a first support strip and a second support device having a second support strip located opposite the first support strip, wherein the first and the second support strip are moved concurrently with the laser cutting apparatus such that a laser beam of the laser cutting apparatus is always oriented towards a gap formed between the first and the second support strip. A dust discharging device is arranged downstream of the support strips in a discharging direction directed away from the laser cutting apparatus. The support strip and/or the dust discharge shaft includes a ventilation device for ventilating the gap.