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TALAT Lecture 4705: Quality Assurance
TALAT Lecture 4705: Quality Assurance
TALAT Lecture 4705: Quality Assurance
TALAT Lecture 4705: Quality Assurance
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TALAT Lecture 4705: Quality Assurance

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This lecture describes the factors important for the quality assurance of adhesive joining; it gives information about the destructive and non-destructive testing methods for the quality control of …

This lecture describes the factors important for the quality assurance of adhesive joining; it gives information about the destructive and non-destructive testing methods for the quality control of adhesive joining. General background in production engineering and material science, some knowledge of mechanics and polymer science is assumed.

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  • 1. TALAT Lecture 4705 Quality Assurance 4 pages, 4 figures Basic Level prepared by Lutz Dorn, Technische Universität Berlin Objectives: − to describe the factors important for the quality assurance of adhesive joining − to give information about the destructive and non-destructive testing methods for the quality control of adhesive joining Prerequisites: − general background in production engineering and material science − background in mechanics and polymer science Date of Issue: 1994  EAA - European Aluminium Association
  • 2. 4705 Quality Assurance Table of Contents 4705 Quality Assurance ...........................................................................................2 4705.01 Test Methods and Test Procedures ........................................................ 2 4705.02 Literature/References ............................................................................... 4 4705.03 List of Figures.............................................................................................. 4 4705.01 Test Methods and Test Procedures The quality assurance in adhesive joining starts with the choice of suitable adhesives and continues with the control and regulation of the adhesive, auxiliary mediums, joining parts, adhesive preparation and working and the adhesive joining. The biggest problem is that a completely non-destructive method for testing adhesive joints does not exist. Consequently, preventive measures are most important: quality should be produced and not tested (Figure 4705.01.01). Quality Assurance 1. Controlling the Adhesive For Example: Manufacturer`s Data Sheet Incoming Ware Control Storage Condition Production Clearance 2. Control of Adhesive For Example: Mixing Ratio Pot Life Application Method Application Amount Single or Double-Sided Application Hardening Parameters (Temperature, Time, Pressure) 3. Control of Joining Parts and their Pretreatment For Example: Dimensional Control Freedom from Burrs Pretreatment Methods Process Parameters 4. Control of Adhesive Joint For Example : Functionality Test (Component) Random Sample Testing (Component) Comparative Tests (Specimen Sample) Non-Destructive Testing (Component) alu Quality Assurance 4705.01.01 Training in Aluminium Application Technologies TALAT 4705 2
  • 3. The test methods are based on the tests for metals which have been correspondingly modified. The statistical destructive methods serve primarily to determine and control characteristic values for the adhesive (Figure 4705.01.02). Testing of Adhesive Joints Testing Adhesive Joints Destructive Tests Considering Special Non-Destructive Tests Environmental Conditions Acoustical Methods Static Dynamic Ultra Sound Adhesive Joint Strength DIN 53283 Fatigue Strength Shear Stress-Glide DIN 54451 DIN 5328 Electrical Methods Tensile Strength DIN 53228 Compressive-Shear Str. DIN 54452 Torsion-Shear Strength DIN 54454 Thermal Methods Creep Strength DIN 53284 Peel Strength DIN 53282 And DIN 53289 Radiation Methods Impact Strength alu Test Methods for Adhesive Joints 4705.01.02 Training in Aluminium Application Technologies A disadvantage of all non-destructive tests is that these allow the measurement of pores, non-uniform adhesive layer thickness and absolute joining defects but not, however, the quality of adhesion of the adhesive and joining parts surfaces. Specially prepared test samples which are also run through the normal manufacturing process are used to control the adhesive joining process. The simplest forms of test samples are the peel samples and the tensile-shear samples (Figure 4705.01.03 and Figure 4705.01.04). Testing Adhesive Joints Force F Mean Separating Force F 0 30 90 100 [%] Angled Peel Test According to DIN 53 282 Diagram Length alu Testing Adhesive Joints - 1 4705.01.03 Training in Aluminium Application Technologies The former are subjected to the same technological conditions as the adhesively joint component and then used for comparative tests, since these indicate the presence of production defects most clearly. TALAT 4705 3
  • 4. Testing Adhesive Joints - 2 + + Floating Roller Peel Test Climbing Drum Peel Test According to DIN 53 289 According to ASTM D 1781-76 alu Testing Adhesive Joints - 2 4705.01.04 Training in Aluminium Application Technologies The surfaces of parts which have to be joint are treated prior to joining in order to have an optimal adhesion force between joint part surface and the adhesive layer. 4705.02 Literature/References 1. Habenicht, G.: Kleben. Springer-Verlag Berlin-Heidelberg-New York 1990. 2. Sauer, J.: Neue Aspekte der Qualitätssicherung bei der Herstellung von Klebverbindungen mit zweikomponentigen Klebstoffen. Dissertation TH Aachen 1989. Adhäsion Buchreihe Heinrich Vogel Fachzeitschriften, München 1989. 3. Brockmann, W.: Schadensuntersuchungen an Klebverbindungen und ihre Lehren. Aus: Tagungsband Fertigungssystem Kleben, TUB-Dokumentation (1984) H. 21, S. 280-297. 4. Endlich, W.: Kleb- und Dichtstoffe in der modernen Technik. Vulkan Verlag Essen 1990. 5. Brockmann, W., Dorn, L. und Käufer, H.: Kleben von Kunststoff mit Metall. Springer Verlag Berlin-Heidelberg-New York 1989. 4705.03 List of Figures Figure No. Figure Title (Overhead) 4705.01.01 Quality Assurance 4705.01.02 Test Methods for Adhesive Joints 4705.01.03 Testing Adhesive Joints - 1 4705.01.04 Testing Adhesive Joints - 2 TALAT 4705 4

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