ISO 18278-2:2016
Resistance welding — Weldability — Part 2: Evaluation procedures for weldability in spot welding
ISO 18278-2:2016 provides specific test procedures for the determination of the acceptable welding current range and the electrode life.
It is applicable for the evaluation of the weldability of assemblies of uncoated and coated sheets of individual thicknesses from 0,4 mm to 6,0 mm.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Welding equipment
4.1 General
4.2 Electrodes
4.3 Welding current
4.4 Mechanical settings
4.5 Measurement of parameters
4.5.1 Welding current and electrode force
4.5.2 Electrode cooling water flow rate
4.6 Measurement of results
4.6.1 Weld diameter
4.6.2 Detection of expulsion
5 Preliminary adjustments
5.1 Electrode alignment
5.2 Electrode conditioning
6 Determination of the welding current range
6.1 Test specimens
6.2 Welding parameters
6.3 Test procedure
6.4 Current range criteria
6.5 Three sheet and multiple stack-ups
7 Estimation of electrode life
7.1 Test specimens
7.2 Welding parameters
7.3 Procedure
7.4 Test criteria, interpretation of results
8 Test report
8.1 General
8.2 Welding current range
8.3 Electrode life
Annex A (informative) Electrode alignment
Annex B (informative) Specific conditions for steel sheet customer qualification
Annex C (informative) Test specimens for mechanical characterization
Annex D (informative) Example of test report for welding current range
Annex E (informative) Example of test report for electrode life test
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Welding equipment
4.1 General
4.2 Electrodes
4.3 Welding current
4.4 Mechanical settings
4.5 Measurement of parameters
4.5.1 Welding current and electrode force
4.5.2 Electrode cooling water flow rate
4.6 Measurement of results
4.6.1 Weld diameter
4.6.2 Detection of expulsion
5 Preliminary adjustments
5.1 Electrode alignment
5.2 Electrode conditioning
6 Determination of the welding current range
6.1 Test specimens
6.2 Welding parameters
6.3 Test procedure
6.4 Current range criteria
6.5 Three sheet and multiple stack-ups
7 Estimation of electrode life
7.1 Test specimens
7.2 Welding parameters
7.3 Procedure
7.4 Test criteria, interpretation of results
8 Test report
8.1 General
8.2 Welding current range
8.3 Electrode life
Annex A (informative) Electrode alignment
Annex B (informative) Specific conditions for steel sheet customer qualification
Annex C (informative) Test specimens for mechanical characterization
Annex D (informative) Example of test report for welding current range
Annex E (informative) Example of test report for electrode life test
Bibliography