Not always the sheet is bent along the marked line — this applies particularly to small details. The case will help the cutter, sharpened an old saw blade. Along the fold lines, make a small incision on the side where you will have to bend the part. To the strength of the tin not diminished, the fold line propagte.
The cutting of sheet metal before bending: 1 — tin detail, 2 — cutter.
V. TOLCHENNIKOV
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