Question
Download Solution PDFIn sheet metal operation two edges are joined by ______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Seaming
- In Sheet metal construction, mechanical seams are employed when joining light and medium gauge metal sheets.
- There are following types of seams:
- Grooved seam
- Pittsburgh seam
- Dovetail seam
- Plain dovetail seam
- Flange dovetail seam
- Beaded dovetail seam
- Double seam
- Butt seam
- Lap seam
- Slip joint seam
Hemming
- The hem is an edge or border made by folding.
- In the hemming process (also called flattening), the edge of the sheet is folded over itself.
- It increases the stiffness of the part.
- It eliminates the sharp edges and prevents damage/wear of the edge.
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