 | Sawing - Course: Manual woodworking techniques. Instruction examples for practical vocational training (Institut für Berufliche Entwicklung, 23 p.) |
 |
|
Instruction Example 2.3. Overlapping Joint
The strips produced in the previous instruction example are now worked after an intermediate operation (planing). Now fine cuts with the grain and across the grain shall follow to manufacture wood connections.
Figure
Material
Cut to length and planed out strips from the instruction example 2.2.
Tools, measuring and testing means
Folding rule, pencil, try square, marking gauge, slitting saw, fine tooth wood saw
Auxiliary accessories
Carpenter’s bench
Necessary previous knowledge
Measuring, scribing, reading of drawings
|
Sequence of operations |
Comments | |
| |
| |
|
1. |
Prepare the working place. |
Check for completeness. |
| | | |
|
2. |
Draw the frame strips together. |
The best side of the frame strips shows in-wards; mark as datum edge. |
|
| | |
|
3. |
Scribe all length sizes (length of the frame wood and of the overlapping wood). |
Clamp and scribe parallel strips together. |
| | |
|
|
4. |
Scribe the working sizes along the thickness of the workpiece. |
With a workpiece thickness of “a” the thickness of the half joint should be “a/2”. |
| | | |
|
5. |
Clamp the frame strips vertically. |
|
| | | |
|
6. |
Check the slitting saw. |
|
| | | |
|
7. |
Saw with the grain. |
Guide the saw horizontally and steadily; leave half of the scribed line. |
| | | |
|
8. |
Clamp the frame strips horizontally. | |
| |
| |
|
9. |
Check the fine tooth wood saw. |
|
| | | |
|
10. |
Cut the steps of the half joint. |
A precise cut is necessary for the tightness of the joints. |
| |
| |
|
11. |
Check the result. |
|
Figure
|
|