Welding characteristics of 27, 40 and 67 kHz ultrasonic plastic welding systems using fundamental- and higher-resonance frequencies

Tsujino, Jiromaru; Hongoh, Misugi; Yoshikuni, Masafumi; Hashii, Hidekazu; Ueoka, Tetsugi

doi:10.1016/j.ultras.2004.02.009

Cited by 27 publications

(8 citation statements)

References 5 publications

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“…Since the penetration of the welded nuggets into each other is unknown, using an energy director is not possible. In the ultrasonic welding of metals, nuggets are formed almost exactly under the sonotrode [15]. But in the ultrasonic welding of PMMA, due to the rigidity of the polymer and the direction of the tool vibration which differs from the USW of metals, in order to have the nuggets approximately under the sonotrode, workpieces were cut as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Kirkland [14] has extracted the fundamental formulas needed in frequency selection in ultrasonic plastic welding. Additionally, Tsujino et al [15] have investigated frequency characteristics of welding machines by using a combination of 90 kHz and 27 or 20 kHz vibration systems and have shown its increasing strength of polyvinyl chloride specimen joints compared with that of 27 kHz plastic welding systems. Moreover, Espinoza et al [16] have optimized the ultrasonic welding machine parameters such as weld time, hold time, and pressure on the burst strength of the joints of polyurethane Fig.…”

Section: Introductionmentioning

confidence: 99%

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Strength modeling and optimizing ultrasonic welded parts of ABS-PMMA using artificial intelligence methods

Norouzi

Adineh

2011

Int J Adv Manuf Technol

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The present work deals with modeling and optimization of ultrasonic welding (USW) process parameters including welding time, pressure, and vibration amplitude influencing strength of the welded parts of acrylonitrile butadiene styrene (ABS) and poly(methyl methacrylate) (PMMA) using artificial intelligence (AI) methods. Experiments performed on samples by spot welding workpieces of ABS and PMMA. The experimental data are used for training of artificial neural networks (ANN), adaptive neuro-fuzzy inference systems, and hybrid systems. It is found that ANN had better predictions compared with the other AI methods. The best model was a feed-forward back-propagation network, with uniform transfer functions (TANSIG-TANSIG-TANSIG) and 4/2 neurons in the first/second hidden layers. The best predictor is then presented to genetic algorithm (GA) and particle swarm optimization (PSO), as the fitness function and for optimizing the USW machine parameters. After the optimization, results of this part revealed that GA and PSO have comparable results and the calculated strength increased by 10%, as compared with a non-optimized case. In order to confirm the computational results, validating experiments are performed which their outputs demonstrates good agreement with the optimization result.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strength modeling and optimizing ultrasonic welded parts of ABS-PMMA using artificial intelligence methods

Norouzi

Adineh

2011

Int J Adv Manuf Technol

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“…Mahmut 1 analyzed the tensile property of ultrasonic seam based on polypropylene, polyester, and polyamide/polyester blend of thermal bonded nonwoven fabrics to investigate the effect of the ultrasonic seam, fiber type, fabric area density, and bonding surface on ultrasonic seam strength and elongation at break properties. Tsujino et al 13,19,20 studied the welding characteristics of ultrasonic welding systems based on 20, 40, and 67 kHz frequency levels and achieved a larger value of weld strength using 67 kHz welding equipment. Subhas and Renuka 3 have stated that a poor energy transmission takes place at lower pressure force; consequently, the fabric temperature was not raised to the required level as well as the fiber orientation was not maintained.…”

Section: Introductionmentioning

confidence: 99%

Effect of ultrasonic welding process parameters on seam strength of PVC-coated hybrid textiles for weather protection

Hussen

Kyosev

Pietsch

et al. 2021

Journal of Industrial Textiles

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Using a lapped seam, PVC-coated hybrid textiles with uniform thickness were bonded by continuous ultrasonic welding and conventional joining method with the help of hot air tape welding technique for weather protection purposes. Three fundamental sewing parameters at two distinct levels and three primary welding parameters at three levels based on 6 and 12 mm welding widths were used. To consider the effect of welding and sewing parameters on seam strength, full factorial designs of experiments were designed, fabricated, and tested. The thermal behavior and possibility of chemical conversion in the welding zone under the influence of ultrasonic vibrations were examined. Variation in width of heat-affected zone of weld seam was measured. The seam strength of ultrasonic weld seam compared with that of conventional seams, and superior seam strength yielding parametric levels were assessed. The parametric influence of both joining techniques on seam quality and their tendencies in the relationship were analyzed statistically. The weld seam strength (1256.392 and 2116.93 N/50 mm) was optimized numerically and identified its trend with the variation of the weld seam. The discovered relationship led to the conclusion that the variation in the weld seam can be used to estimate the tensile strength of the weld seam through the developed effective numerical model as a non-destructive testing method, and its outcome was successful as a destructive testing method. The result shows that the ultrasonic weld seam provided a higher tensile strength ( > 75%) than the conventional seam for both evaluated welding widths and obtained statistically significant results.

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“…The bulk motion system described in 1.2.1 and 1.2.2 was used for simple force and displacement control for an in-depth study of the use of different waveforms on polymer vibration welding on ABS plastic sheet. Previous work by others has studied the effects of frequency (Stokes, 1988b) as well as simultaneously using multiple harmonics while welding (Tsujino, 2004), although none yet have investigated the effect of different waveforms. A basic Fourier analysis reveals that square waves and triangle waves can be described by a superposition of many other sine waves of varying frequency and amplitude.…”

Section: Effect Of Waveform On Polymer Vibration Welding In Absmentioning

confidence: 99%

“…Research has also been conducted on not only frequency effects (Benatar, 1989b), but also the effect of welding with multiple harmonics in use simultaneously, which resulted in a larger effective weld area and weld strength (Tsujino, 2004). Strong frequency effects are also seen in far-field welding of semicrystalline polymers, where it has been found that locating weld joints at vibration anti-nodes can have a significant impact on weld quality (Benatar, 1989a).…”

Section: Introductionmentioning

confidence: 99%

Desktop microforming and welding system powered by a flextensional Terfenol-D transducer

Witthauer

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Welding characteristics of 27, 40 and 67 kHz ultrasonic plastic welding systems using fundamental- and higher-resonance frequencies

Cited by 27 publications

References 5 publications

Strength modeling and optimizing ultrasonic welded parts of ABS-PMMA using artificial intelligence methods

Strength modeling and optimizing ultrasonic welded parts of ABS-PMMA using artificial intelligence methods

Effect of ultrasonic welding process parameters on seam strength of PVC-coated hybrid textiles for weather protection

Desktop microforming and welding system powered by a flextensional Terfenol-D transducer

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