Analiza spojev, izdelanih z uporovnim točkovnim varjenjem in lepljenjem

Dolinar, Blaž (author), Klobčar, Damjan (mentor), Šturm, Roman (comentor)

V avtomobilski industriji se pogosto uporablja uporovno točkovno varjenje za spajanje karoserijskih delov, vedno več pa tudi hibridni postopki spajanja. Primerjali smo uporovno točkovno zvarjene, lepljene in hibridno spajane vzorce ter opravili natezno-strižni preizkus ter vizualno in metalografsko analizo. Optimalni varilni parametri pločevine so varilni tok 7,5 kA, čas varjenja 400 ms in sila stiskanja 2,5 kN. Zaradi slabe adhezijske vezi lepljeni spojih niso dosegli željene trdnosti. Hibridni spojih imajo manjšo natezno-strižno trdnost kot varjeni, za kar je krivo lepilo na mestu varjenja.

• Language: Slovenian
• Keywords: uporovno točkovno varjenje (UTV), lepljenje, primerjava spojev, hibridni spoji, pocinkana pločevina, priprava varjencev
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [B. Dolinar]
• Year: 2019
• Number of pages: XXII, 62 str.
• PID: 20.500.12556/RUL-107682
• UDC: 621.791.76(043.2)
• COBISS.SI-ID: 16631835
• Publication date in RUL: 12.05.2019

Secondary language

• Language: English
• Title: Analysis of joints made using resistance spot welding and adhesive bounding

Abstract

Resistance spot welding is in the automotive industry often used for welding body parts as well as hybrid bonding which is lately more and more often in use. We compared resistance spot welded, hybrid and adhesive bonded joints and did a visual inspection, tensile-shear test and metallographic analysis. Optimal welding parameters of sheet metal are welding current of 7.5 kA, welding time 400 ms and welding force of 2.5 kN. Due to poor adhesion, adhesive joints did not achieve the desired strength. Hybrid joints have lower tensile shear strength as welded joints because of adhesive in place where spot weld is made.

• Keywords: resistance spot welding (RSW), adhesive bonding, comparison of joints, hybrid joints, galvanized steel sheet, preparation of workpieces