Sheet Metal Working

1
Sheet Metal Working

• Soldering and Riveting

2
Types of Sheet Metal

• Steel (Ferrous)
• Non-Steel (Non-Ferrous)

3
Steel Sheet Metal

• Galvanized
• Stainless
• Tin Plate

4
Non-Steel Sheet Metal

• Copper
• Aluminum
• Lead
• Zinc

5
Galvanized Sheet Metal

• Soft steel sheet covered with a zinc coating
• Has a dull appearance

6
Galvanized contd.

• Zinc coating provides a corrosive resistance
• Relatively inexpensive

7
Galvanized contd.

• Used for many purposes
• Roofing
• Ductwork

• Gutters
• Signs
• Posts

8
Stainless Steel Sheet Metal

• High grade steel covered with a coating of
  chromium and nickel
• Has high corrosive properties
• Cleans easily

9
Stainless Steel contd.

• Has a silver/chrome appearance
• Very tough to bend

10
Stainless Steel contd.

• Will last forever
• Very expensive
• Used for many purposes

• Food/dairy industry
• Sinks
• Tables
• Grills
• Utensils

11
Tin Plate Sheet Metal

• Steel coated with pure tin
• Once widely used for sinks, cans, food/dairy
  industry
• Mainly replaced by stainless steel

12
Copper Sheet Metal

• High corrosive resistance
• Used mainly in roofs and gutters
• Very expensive

13
Aluminum Sheet Metal

• Used for
• Gutters and spouts
• Siding
• Wheels and rims
• Cans

• Good corrosive resistance
• Very light weight
• Durable

14
Lead Sheet Metal

• One of the oldest sheet metals
• Used for thick tanks and radiation areas
• X-ray proof

15
Soldering

• The joining of two or more pieces of metal by
  using an alloy with a lower melting point than
  the pieces being joined

16
The Make-Up of Solder

• Tin / Lead
• Examples
• 50/50

• 60/40
• 95/5
• Lead Free Solder

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The Make-Up of Solder contd.

• As you increase the Tin , the melting point of
  the solder is lowered

18
Flux

• Removes/Cleans the oxide film from the surface of
  metal
• Solder would not stick without the use of flux
• May come in many different forms

19
Types of Flux

• Acid Flux
• Hydro-chloric
• Cut Acid

• Rosin Flux
• Powder
• Paste
• Liquid

20
Soldering Tools/Equipment

• Solder
• Electric Soldering Gun
• Sal Ammoniac Block

• Flux
• Gas Bench Furnace
• Propane Torch
• Soldering Copper

21
Riveting Metal

• Fastening device that is held in place by
  spreading one or both ends
• Fastened by using a rivet set or by peining

22
Types of Rivets

• Pop Rivet
• Brass Rivet
• Copper Rivet

• Iron Rivet
• Aluminum Rivet

23
Drilling Holes for Riveting

• Holes drilled in thicker metal are made with a
  portable drill, or better yet a drill press
• Uses high speed twist drill bits which are
  hardened for use in metal