Beam Welding Control for Sag Prevention
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Solution Overview
Problem
In high mechanical-technological applications, beam welding processes face challenges in achieving high weld quality due to sagging of weld material and difficulty in monitoring the welding depth, especially with dynamic process states and small component geometries, where manual control of beam current is insufficient and nondestructive testing methods are inadequate.
Innovation Solution
A method involving defined beam current settings and periodic pulses to control the melting process, ensuring the weld material is melted only up to a specific depth, creating weld regions that project out and form a pattern representative of weld quality, allowing for easy visual inspection and quality assessment without destructive testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual control of beam current is used to achieve continuous through-welding, then weld quality can be monitored visually, but the rapidly changing process states cannot be countered within the required response time
Solution Approach 1:
The system uses optical sensors to detect the presence or absence of through-welding in real-time during the beam welding process. This feedback signal is automatically fed to the control unit, which adjusts the beam current dynamically without manual intervention. The automated feedback loop enables rapid response to process changes while maintaining visual monitoring capability through the sensor system.
Solution Approach 2:
The manual mechanical control of beam current via potentiometer is replaced by an automated electronic control system. The control unit processes sensor signals and automatically adjusts beam current parameters, substituting the manual mechanical adjustment mechanism with an electronic automation system that responds faster to process variations.
2Manufacturing precision
If beam current is increased to ensure continuous threading through, then welding depth is improved, but material sagging and dripping increase
Solution Approach 1:
The system dynamically adjusts the beam current during the welding process based on real-time sensor feedback. Instead of using a static high current setting, the control unit modulates the current intensity according to the actual welding state, increasing current only when needed to achieve through-welding and reducing it when the melt pool becomes unstable, thereby preventing material sagging while maintaining welding depth consistency.
Solution Approach 2:
The control system applies periodic pulses or variations in beam current rather than continuous high current. This periodic modulation allows the weld pool to stabilize between pulses, preventing excessive material sagging while ensuring that each pulse achieves the necessary penetration depth. The rhythmic current adjustment creates controlled melting cycles that maintain precision without harmful sagging.
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 ensures high weld quality with reduced material sagging and allows for efficient quality evaluation, enabling easy adaptation to component geometries and automation of the welding process, producing a component structure with consistent and high-quality welds.
Implementation Method 1
the components are subjected to beam energy from a first side of the contact region of the components that is facing the energy input in the direction of an opposite second side of the contact region, and are melted at least in certain regions in the contact region
Implementation Method 2
a variation of the beam current is set such that the components are melted in the contact region
Implementation Method 3
a defined beam current pulse is periodically imparted to the variation of the beam current, in order to melt the components in certain regions
Implementation Method 4
produce in the region of the second side weld regions of a weld root of the weld connecting the components that project out of the contact region
Data Source
AI summary
A method for producing a component structure of two components includes subjecting the components to beam energy for melting in a contact region. A variation of beam current is set to melt the components in the contact region over a defined component depth less than the perpendicular distance between sides of the contact region. A defined beam current pulse is periodically imparted to the variation of the beam current, to melt the components at least approximately over the entire perpendicular distance between the sides of the contact region and to produce in the region of the second side weld regions of a weld root of the weld connecting the components projecting from the contact region and form a pattern which representative of a weld quality. Between the weld regions there is no melting of the components in the region between the defined component depth and the second side.