Ultrasonic welding of the round-shaped products made of polyamide 610

The paper considers features of ultrasonic welding of the round-shaped products made of polyamide 610. It proposes a technology for ultrasonic welding of the round-shaped products made of polyamide 610; high-quality hermetic connection was obtained along the entire contour. Physical and mechanical properties of the polyamides determining their ability to weld, as well as the processes occurring during the ultrasonic welding, are described. Ultrasonic welding waveguide-tool of the round shape with the diameter equal to diameter of the titanium alloy product being welded was developed. The technological welding conditions influence on the welded points strength and quality was studied. It was established that in ultrasonic welding of products such as a lid-cup, it is advisable to remove the static welding pressure only after turning off the ultrasonic vibrations and forging the weld. Support-holders and nest-shaped forms allowing the high-quality welding were considered. In order to increase energy concentration on the abutting welded surfaces, a V-shaped edge preparation was selected making it possible to obtain a hermetically sealed welded joint with maximum strength and high surface cleanliness in junction of the round-shaped products made of polyamide 610. It is shown that heat is released on the welded surfaces due to internal friction and hysteresis losses at the cyclic deformation.

References

[1] Kryzhanovskiy V.K., ed. Tekhnicheskie svoystva polimernykh materialov [Technical properties of polymeric materials]. Sankt-Petersburg, Professiya Publ., 2005. 235 p. (In Russ.).

[2] Volkov S.S. Svarka i skleivanie polimernykh materialov [Welding and bonding of polymers]. Moscow, Khimiya Publ., 2001. 376 p. (In Russ.).

[3] Volkov S.S. Ultrasonic welding technology for multi-element rigid plastics. Svarochnoe proizvodstvo, 2003, no. 10, pp. 35–39. (In Russ.).

[4] Karkhin V.A. Teplovye protsessy pri svarke [Thermal processes in welding]. Sankt-Petersburg, Izd-vo Politekhnicheskogo universiteta Publ., 2013. 646 p. (In Russ.).

[5] Volkov S.S., Nerovnyy V.M., Maloletkov A.V. Technological features of ultrasonic welding of rigid plastics in a vacuum. Svarka i diagnostika [Welding and Diagnostics], 2015, no. 6, pp. 29–32. (In Russ.).

[6] Volkov S.S. Technology for ultrasound welding multielement components produced from rigid plastics. Weld. Int., 2004, vol. 18, no. 3, pp. 242–245, doi: https://doi.org/10.1533/wint.2004.3273

[7] Volkov S.S. Effect of dimensions of the gap between the edges on the strength of ultrasound welded joints in rigid plastics. Weld. Int., 2003, vol. 17, no. 6, pp. 482–486, doi: https://doi.org/10.1533/wint.2003.3154

[8] Volkov S.S., Bigus G.A. Technology and equipment for ultrasonic contour welding of ABS plastic products. Svarochnoe proizvodstvo, 2016, no. 9, pp. 51–57. (In Russ.).

[9] Volkov S.S. Ultrasonic butt welding of rigid plastics. Svarochnoe proizvodstvo, 2011, no. 9, pp. 10–14. (In Russ.).

[10] Volkov S.S., Shestel L.A., Sokolov V.A. Ultrasonic welding of polyamide sealing gaskets using infrared radiation. Weld. Int., 2016, vol. 30, no. 2, pp. 150–154, doi: https://doi.org/10.1080/09507116.2015.1036535

[11] Volkov S.S. Ultrasonic butt welding of rigid plastics. Weld. Int., 2013, vol. 27, no. 1, pp. 63–66, doi: https://doi.org/10.1080/09507116.2012.695155

[12] Volkov S.S. Main welding parameters of ultrasound contour welding of polyethylene vessels. Weld. Int., 2011, vol. 25, no. 11, pp. 898–902, doi: https://doi.org/10.1080/09507116.2011.581433

[13] Volkov S.S. Ultrasound welding of brush elements. Weld. Int., 2012, vol. 26, no. 10, pp. 796–799, doi: https://doi.org/10.1080/09507116.2011.653164

[14] Aleshin N.P., Chernyshov G.G. Svarka. Rezka. Kontrol. T. 1 [Welding. Cutting. Control. Vol. 1]. Moscoew, Mashinostroenie Publ., 2004. 624 p. (In Russ.).

[15] Volkov S.S. Joining thermoplastics with metallic and non-metallic materials. Weld. Int., 2013, vol. 27, no. 2, pp. 163–166, doi: https://doi.org/10.1080/09507116.2012.695551