TY - GEN

T1 - Investigation and optimization of process parameters and tools for underwater bonding of brackets

AU - Lemmrich, Luzie

AU - Vaccari, Leandro

AU - Fröck, Linda

AU - Hassel, Thomas

AU - Flügge, Wilko

N1 - Funding Information: The IGF project number 21.002 BG / DVS number V4.3223 of the Forschungsvereinigung Schweißen und verwandte Verfahren e.V. des DVS,Aachener Straße 172, 40223 Düsseldorf, Germany, was funded by the Federal Ministry of Economics and Climate Protection via the AiF within the framework of the program for the promotion of joint industrial research (IGF) on the basis of a resolution of the German Bundestag. The authors would like to thank the sponsors for funding the research project. Sincere thanks also go to companies of the project-accom- panying committee for providing materials and content support for the research project.

PY - 2023

Y1 - 2023

N2 - The research project presented here provides an advanced process for the adhesive underwater bracket joining. As an alternative to the previously established underwater welding process, it comes with a number of bene-fits, such as low heat input, no damage or weakening of the components to be joined, and fewer risks for divers. In order to make the bonding process for the subsequent retainer attachment safer and more repeatable, a pro-totype for performing a multi-step injection process was developed within the scope of this project. Various process parameters were analyzed and adjusted at the Fraunhofer IGP to achieve strong adhesion. Based on this knowledge, a demonstrator tool for manual and semi-automated bonding under water was developed. This is being tested in realistic trials by divers in the UWTH water basin. To investigate the aging of the adhesive layer in a wet environment, holder samples were stored in laboratory as well as open water and then tested in a tensile shear tests.

AB - The research project presented here provides an advanced process for the adhesive underwater bracket joining. As an alternative to the previously established underwater welding process, it comes with a number of bene-fits, such as low heat input, no damage or weakening of the components to be joined, and fewer risks for divers. In order to make the bonding process for the subsequent retainer attachment safer and more repeatable, a pro-totype for performing a multi-step injection process was developed within the scope of this project. Various process parameters were analyzed and adjusted at the Fraunhofer IGP to achieve strong adhesion. Based on this knowledge, a demonstrator tool for manual and semi-automated bonding under water was developed. This is being tested in realistic trials by divers in the UWTH water basin. To investigate the aging of the adhesive layer in a wet environment, holder samples were stored in laboratory as well as open water and then tested in a tensile shear tests.

KW - adhesive bonding

KW - material questions

KW - underwater adhesive bonding

UR - http://www.scopus.com/inward/record.url?scp=85171545285&partnerID=8YFLogxK

U2 - 10.53192/WAC20230250

DO - 10.53192/WAC20230250

M3 - Contribution in non-scientific journal

AN - SCOPUS:85171545285

VL - 2023

SP - SP50-SP55

JO - Welding and Cutting

JF - Welding and Cutting

SN - 1612-3433

ER -