Next Article in Journal
Experimentally Validated Extension of the Operating Range of an Electrically Driven Turbocharger for Fuel Cell Applications
Previous Article in Journal
Design and Multi-Objective Optimization of a 12-Slot/10-Pole Integrated OBC Using Magnetic Equivalent Circuit Approach
Article

New Method for Determining the Machine-Hand Welding Times Using Ultrasonic Welding Machines with Rotary Sonotrode

1
Department of Clothing Technology, Faculty of Textile Technology, University of Zagreb, 10000 Zagreb, Croatia
2
Department of Textile Design and Management, Faculty of Textile Technology, University of Zagreb, 10000 Zagreb, Croatia
3
Department of Electroacoustics, Faculty of Electrical Engineering and Computing, University of Zagreb, 10000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: António Bastos Pereira
Machines 2021, 9(12), 330; https://doi.org/10.3390/machines9120330
Received: 4 November 2021 / Revised: 25 November 2021 / Accepted: 30 November 2021 / Published: 2 December 2021
(This article belongs to the Section Material Processing Technology)
The paper presents a new method for determining the machine-hand welding times of synthetic polymer materials using ultrasonic welding machines with rotary sonotrode. The method is based on the claims and observations of W. Möller intended for the clothing industry in the 1990s, according to which there is a spontaneous drop in sewing speed when strongly curved seams are joined, which is due to the possibility of human reactions. The method for determining machine-hand sewing times of curved seams was well accepted in garment production processes. It is used to standardize production time. Using ultrasonic welding machines with rotary sonotrode, the problem of determining the time of ultrasonic joining of curved seams on clothing or technical textiles remained unsolved. That is why is completely new and original model was created, which combines eight technical parameters of ultrasonic welds, eight technological parameters of the production process and seven ergonomic parameters depending on the psychophysical conditions of the workers. The systematic development of the mathematical relationship of all 23 parameters mentioned and the corresponding mathematical expressions for determining and calculating these parameters are presented. These results were also verified by experimental measurements, which show a favourable correlation between the calculated and measured machine hand times. The relationships between the recommended welding speeds, the critical radii of curvature and the number of reactions required according to Möller and the new model are also presented. An analysis of the success in the application of Möller’s and the new model was also performed. View Full-Text
Keywords: ultrasonic welding; rotary sonotrode; polymer materials; garment manufacturing; human reaction; machine-hand times; ergonomic parameters ultrasonic welding; rotary sonotrode; polymer materials; garment manufacturing; human reaction; machine-hand times; ergonomic parameters
Show Figures

Figure 1

MDPI and ACS Style

Rogale, D.; Rogale, S.F.; Knezić, Ž.; Fajt, S. New Method for Determining the Machine-Hand Welding Times Using Ultrasonic Welding Machines with Rotary Sonotrode. Machines 2021, 9, 330. https://doi.org/10.3390/machines9120330

AMA Style

Rogale D, Rogale SF, Knezić Ž, Fajt S. New Method for Determining the Machine-Hand Welding Times Using Ultrasonic Welding Machines with Rotary Sonotrode. Machines. 2021; 9(12):330. https://doi.org/10.3390/machines9120330

Chicago/Turabian Style

Rogale, Dubravko, Snježana F. Rogale, Željko Knezić, and Siniša Fajt. 2021. "New Method for Determining the Machine-Hand Welding Times Using Ultrasonic Welding Machines with Rotary Sonotrode" Machines 9, no. 12: 330. https://doi.org/10.3390/machines9120330

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop