Ultrasonic Welder Dynamic Parameter Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ultrasonic welders face variations in weld results due to temperature fluctuations in the ultrasonic stack, which affect heat energy levels, leading to inconsistent weld parameters in automated installations.
Innovation Solution
Implementing a dynamic adjustment method where the weld parameter for the next cycle is set based on the average heat energy parameter of the ultrasonic stack, using a controller to monitor and adjust the power supply according to changes in stack heat energy, such as temperature, resonant frequency, or phase difference, within predetermined thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the ultrasonic welder operates under stable conditions with fixed weld parameters, then the device complexity is reduced and ease of operation is improved, but manufacturing precision deteriorates due to temperature fluctuations affecting weld consistency
Solution Approach 1:
The patent implements a feedback control system where the controller continuously monitors weld parameters and stack temperature, then dynamically adjusts the weld parameter for subsequent cycles based on detected deviations. This closed-loop feedback mechanism maintains weld consistency despite temperature fluctuations without requiring overly complex manual intervention systems.
Solution Approach 2:
The patent transitions from static fixed weld parameters to dynamic adjustable parameters. The controller automatically modifies weld parameters in real-time based on detected temperature changes and weld performance, allowing the system to adapt to varying conditions while maintaining precision without excessive complexity.
2Manufacturing precision
If the weld parameter is dynamically adjusted based on stack heat energy, then manufacturing precision is improved, but device complexity increases due to additional monitoring and control mechanisms
Solution Approach 1:
The controller monitors stack heat energy parameters (such as temperature or resonant frequency) and uses this feedback to dynamically adjust weld parameters. This feedback loop ensures consistent weld quality by compensating for temperature-driven variations in heat energy, while the automated nature of the adjustment prevents excessive system complexity.
Solution Approach 2:
The patent replaces manual parameter adjustment mechanisms with automated electronic control. The controller automatically detects heat energy changes and adjusts weld parameters without requiring complex mechanical intervention systems, thereby improving precision while keeping the added complexity manageable through electronic automation.
3Productivity
If the ultrasonic stack temperature is allowed to fluctuate during operation, then productivity is improved by continuous operation, but manufacturing precision deteriorates due to varying heat energy levels
Solution Approach 1:
The patent enables continuous high-productivity operation by dynamically adjusting weld parameters in response to temperature fluctuations. Rather than requiring the stack to reach a stable temperature before each weld, the system adapts parameters in real-time, allowing continuous operation while maintaining consistent weld quality throughout the production cycle.
Solution Approach 2:
The controller changes weld parameters (such as energy, time, or amplitude) based on detected stack heat energy levels. This parameter adjustment compensates for temperature variations that occur during continuous operation, ensuring weld quality consistency is maintained even as the stack temperature fluctuates during high-productivity continuous welding cycles.
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 approach stabilizes weld results by adapting to changes in stack heat energy, ensuring consistent performance even under varying ambient temperatures, thereby maintaining optimal weld quality.
Implementation Method 1
Electrical energy from a power supply 122 at a frequency of 20-60 kHz is converted to mechanical energy by the ultrasonic transducer 102. The mechanical energy converted in the ultrasonic transducer 102 is transmitted to an application 108
Implementation Method 2
The ultrasonic horn is typically one-half wavelength long at the resonant frequency that is produced by the ultrasonic transducer 102
Implementation Method 3
The ultrasonic horn causes oscillatory compression/decompression of the plastic parts with respect to each other causing surfaces of the plastic parts abutting each other at a weld interface to be heated, eventually melting together
Implementation Method 4
The mechanical vibration that results on a horn tip 110 is the motion that performs the task of welding the parts 112, 114 together
Data Source
AI summary
An ultrasonic welder includes dynamic adjustment of a weld parameter used to control welds of weld cycles during serial operation of the ultrasonic welder. The ultrasonic welder includes a power supply controlled by a controller and the controller sets a value of the weld parameter for a next weld cycle based on a value of a stack heat energy parameter indicative of heat energy in the ultrasonic stack prior to beginning the next weld cycle. The controller controls the power supply based on the value set for the weld parameter to control a weld in the next weld cycle.