Influence of Plastic Machining on the Quality of a Clinching Joint in Aluminum
Waldemar Matysiak, Jakub Kowalczyk
TL;DR
This paper studies how plastic deformation affects the strength of clinching joints in aluminum and explores non-destructive methods to assess sheet thickness changes.
Contribution
The study introduces a non-destructive ultrasonic method to evaluate sheet thickness reduction in clinching joints.
Findings
Increased crumpling in sheet metal improves the strength of clinched joints, with 60% crumpling yielding 712 N strength.
Ultrasonic longitudinal wave speed is the most effective non-destructive measure for assessing sheet thickness reduction.
Abstract
Permanent joints are commonly used in vehicle construction. The main methods used are gluing, welding and heat sealing. However, other joining methods that utilise plastic deformation of sheet metal are also becoming increasingly common. These methods include the sheet metal clinching joint. This is a joint that allows sheet metal to be joined, often in combination with bonding. Sheet metal of various thicknesses is used in vehicle construction and is subjected to plastic working. The main objective of the work was to assess the influence of plastic working of sheet metal on the strength of clinching joints. An additional objective was to determine the possibility of assessing the degree of aluminum sheet thickness reduction in a non-destructive manner using the ultrasonic (UT) method. The tests carried out showed that as the crumple increases, the strength of the clinched joint is…
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Taxonomy
TopicsAdvanced Welding Techniques Analysis · Metal Forming Simulation Techniques · Mechanical Behavior of Composites