![]() | Shearing - Course: Technique of working sheet metals, pipes and sections. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 17 p.) |
The different shearing techniques are distinguished by the kind of cutting.
Cutting-in
A cut is performed that is only partially penetrating the material. Thus, the material is not cut completely.
Cutting-in is mostly effected in preparing the subsequent bending-off procedure.
Figure 21. Cutting-in for subsequent
bending
Cutting-off
A cut is performed, going through the material completely and thus separating the material. The cut-off and extremely bent material is scrap.
Figure 22. Cutting-off
1 workpiece, 2 waste
Cutting-out
The material is completely cut alongside a line closed in itself.
The material cut out is the workpiece, the rest is scrap.
Figure 23. Cutting-out
1 workpiece, 2 waste
Punching
The material is completely cut alongside a line closed in itself. The material cut out is scrap, the material surrounding is the workpiece.
Figure 24. Cutting-out
1 workpiece, 2 waste
Which stages are passed through in a shearing
process?
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What is the difference between the techniques of cutting-out and
punching?
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