Method for Controlling Energy Input of a Pulsed Light Arc Plasma in a Joining Process and Device

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention describes a method and apparatus for real-time control of energy input during joining processes such as welding or soldering using pulsed arc plasma. It utilizes two photodiodes, each sensitive to different light wavelengths emitted by the arc plasma, to generate measurement signals in different spectral regions. By comparing these signals, a system can control the energy supply to the plasma very quickly and precisely, improving the quality and safety of the welding or joining process.

Use CasesContent extracted from patent full text and abstract with AI.

• Automated welding systems for thin metal sheets where precise energy input is critical.
• Quality assurance and control in industrial assembly lines involving welding or soldering.
• Retrofit modules for existing welding machines to upgrade them with advanced process monitoring and control.
• Manufacturing of sensitive or heat-sensitive assemblies (e.g., electronics, aerospace components) where over- or under-heating must be avoided.
• Research and development environments needing precise control and monitoring of plasma-based joining processes.

BenefitsContent extracted from patent full text and abstract with AI.

• Enables highly accurate, real-time control of plasma energy input, reducing risk of defects such as burn-through or weak joints.
• Improves process stability and reproducibility in joining thin or delicate materials.
• Facilitates adaptation to different materials and process requirements through adjustable parameters.
• Supports both simple and advanced welding or soldering equipment, enhancing versatility and broad applicability.
• Uses affordable, fast-response photodiodes for efficient sensing, lowering hardware costs and increasing reliability.
• Compact design allows integration into welding heads or machines without significant space requirements.
• Differential signal processing helps compensate for potential disturbances like contamination or misalignment, increasing robustness.

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Patent Abstract

The invention relates to a method for regulating an energy input of a pulsed arc plasma during a joining process, particularly during a welding or soldering process, wherein the method comprises the following steps: Detecting first measurement signals for a first temporal course of emitted light from an arc plasma of the joining process in a first spectral region using a first photodiode, which has a sensitivity maximum at a first wavelength, detecting second measurement signals for a second temporal course of the emitted light from the arc plasma of the joining process in a second spectral region, which is at least partially different from the first spectral region, using a second photodiode, which has a sensitivity maximum at a second wavelength different from the first wavelength, generating control signals in that in an evaluation device the first measurement signals and the second measurement signals are compared, and regulating an energy source, which is configured to provide pulsed energy for the arc plasma in accordance with the control signals. The invention further relates to an apparatus for regulating an energy input.