1. Issa al-tobi الكلية التقنية بنزوى Nizwa College of Technology Mechanical Engineering Department SHEET METAL Done by: Issa AL-Tobi

2. Issa al-tobi Sheet metal work Application Application Steps (1) sheet (2)development (3) mark (4) shear (5) bend Steps (1) sheet (2)development (3) mark (4) shear (5) bend Tools Tools Shearing Shearing Bending allowance Bending allowance job job Snips Snips Stakes Stakes Bending M/C Bending M/C Folding M/C Folding M/C Press Press Hammers Hammers

3. Issa al-tobi Application of sheet metal Air conditioning duct systems. Air conditioning duct systems. Roofs. Roofs. Ships Ships Airplane industries. Airplane industries. Restaurant equipment……etc. Restaurant equipment……etc.

4. Issa al-tobi

5. Examples of sheet metals

6. Issa al-tobi Using tools (snips) cutting and bending sheet metal Straight and curved-blade snips

7. Issa al-tobi Continued (hand-lever shears)

8. Issa al-tobi Continued (guillotine) cutting large sheets with straight edges

9. Issa al-tobi Continued (fly press) Where a number of components require the same size hole in the same position

10. Issa al-tobiStakes Using when forming sheet metal into various different shapes. Round bottom square Oval head Creasing iron hatchet Side or pipe Bick iron funnel Half moon Bench mandrel

11. Issa al-tobiHammers Using in the various aspects of sheet metalworking Peining or tucking planishing Welder’s chipping Doming sinking Raising Ball pein

12. Issa al-tobi Some joining Methods Welds Bolts Rivets Solder Clips

13. Issa al-tobi Development of rectangular tray

14. Issa al-tobi Bending Allowance-Ex.

15. Issa al-tobi Bending Allowance Formula = 2  ( r + t/2 ) a/360 Where t = metal thickness r = Bend radius a = bending angle

16. Issa al-tobi Thickness of metal sheet SWG Thickness (mm) 103.2 122.6 142.0 161.6 181.2 191.0 200.9 220.7 240.6

17. Issa al-tobi Practical exercise

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