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Contents
1. Introduction ... 5
2. Aim and scope ... 6
3. Motivation ... 7
Literature overview ... 13
4. Can Production Process ... 13
5. Quality System in a Can Production Process ... 20
5.1.Requirements for quality of beverage cans ... 20
5.2 Quality control tests in the front of the line ... 23
5.3 Quality control tests for decorating and coating operations ... 24
5.4. Quality control of final parameters ... 25
6. Material ... 30
6.1. Properties of stripes from 3104 stripes in H19 ... 30
6.2. Evaluation of material usability ... 31
6.3. Anisotropy ... 32
6.4. Forming limit diagrams ... 34
6.5. Strengthening curves ... 36
7. Complaints ... 38
7.1. Complaints in can making process ... 38
7.2. Logistic operations supporting can making process concerning defects ... 42
8. Statistical Process Control ... 46
8.1. Uncertainty of measurement and its classification ... 46
8.2 Analysis of measurement systems ... 47
8.3 Choice of resolution of measurement devices ... 48
8.4 Design of control charts ... 50
Practical part ... 53
9. Experiment – drawability test ... 53
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9.2 Equipment and characteristics of drawability test ... 54
10. Sampling and results ... 60
10.1. Thickness ... 60 10.2. Mechanical properties ... 63 10.3. Drawability ... 70 11. Analysis ... 75 11.1. Thickness ... 75 11.2. Mechanical properties ... 78 11.3. Drawability ... 87 12. Implementation ... 92
12.1. Procedure of the test and influence of its implementation ... 92
12.2. Control charts for the process ... 95
13. Verification ... 100 13.1. Thickness ... 100 13.2. Mechanical Properties ... 103 13.3. Drawability ... 107 14. Conclusions ... 111 15. List of figures ... 114 16. List of tables ... 117 17. Publication bibliography ... 118
