Ultrasonic Welding Horn Mounting System Gap Control
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Solution Overview
Problem
In ultrasonic welding, existing systems lack precise control over the gap between the horn and anvil, which affects the physical characteristics of the welded product, and do not adequately limit degrees of freedom to ensure consistent parallel alignment of the horn's longitudinal axis with the anvil's.
Innovation Solution
A mounting system that restricts the horn and anvil to specific degrees of freedom, allowing only rotational motion about their respective axes and translational motion perpendicular to these axes, with additional adjustments using threaded fasteners to control the gap and align the horn's longitudinal axis parallel to the anvil's.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the horn is allowed to move freely in multiple directions, then the system has greater flexibility for positioning, but the gap control between horn and anvil becomes imprecise and alignment consistency deteriorates
Solution Approach 1:
The mounting system is segmented into distinct functional components: a base structure, a positioning mechanism with adjustable arms, and a horn support assembly. Each segment handles a specific degree of freedom, allowing independent adjustment of gap distance and angular alignment while maintaining overall system precision without excessive complexity
Solution Approach 2:
The mounting system incorporates dynamic adjustment capabilities through movable arms and adjustable joints that allow the horn position to be modified during setup and maintenance. This dynamic positioning system enables precise gap control and alignment while maintaining structural integrity, resolving the contradiction between precision and complexity
2Manufacturing precision
If the horn longitudinal axis is not aligned parallel to the anvil longitudinal axis, then adjustment flexibility is increased, but the welding product physical characteristics deteriorate
Solution Approach 1:
The mounting system incorporates preliminary alignment features such as guide rails, reference marks, and pre-configured angular positions that facilitate accurate parallel alignment between the horn and anvil axes. These preliminary structural elements enable precise alignment to be achieved through simple operational adjustments rather than complex procedures
Solution Approach 2:
The system replaces complex mechanical alignment procedures with simpler mechanisms such as adjustable pivot points, spring-loaded positioning elements, and gravity-assisted alignment features. These mechanical substitutions maintain precise axis parallelism while significantly improving the ease of operation during setup and adjustment
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 configuration enables precise control over the gap and alignment, improving the consistency and quality of the welding process by reducing unnecessary degrees of freedom, thus enhancing the manufacturing of products with specific gap requirements.
Implementation Method 1
The converter (also referred to as a 'transducer') receives the AC signal and responds thereto by compressing and expanding at a frequency equal to that of the AC signal
Implementation Method 2
The horn vibrates, typically at 20,000 Hz to 40,000 Hz, transferring energy, typically in the form of frictional heat, under pressure, to the parts
Implementation Method 3
transferring energy, typically in the form of frictional heat
Data Source
AI summary
An ultrasonic rotary welding apparatus and methods of using the same are disclosed. The ultrasonic welding device includes an ultrasonic horn and an anvil. The ultrasonic horn is constrained by a mounting system. The mounting system permits the horn to exhibit two degrees of freedom. The first degree of freedom permits translational motion in a direction perpendicular to the longitudinal axis of the horn. The second degree of freedom permits rotation about an axis perpendicular to both the longitudinal axis of the horn and the direction of translational motion.