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BLACKSMITHY SHOP

BY: MANOJ YADAV
• Black" in "blacksmithy" refers to the
black fire scale, a layer of oxides that
forms on the surface of the metal
during heating.
• The word "smith" derives from an
old word, "smite" (to hit).
Forging
• “Forging is defined as the controlled plastic
deformation of metal into predetermined shapes by
pressure or impact blows, or combination of both.”

• “Forgeability is the relative ability of a material to
deform under a compressive load without
rupture.”
Grain Structure
• Parts have good strength
• High toughness
• Forgings require additional heat treating

grain flow (a) casting (b) machining (c) forging
Forging Materials
1.
2.
3.
4.

Aluminium alloys
Magnesium alloys
Copper alloys
Low carbon alloy
steel
5. Stainless steel
6. Nickel alloys

7. Titanium alloys
8. Iron based super alloys
9. Cobalt based super

alloys
10. Tantalum alloys
11. Tungsten alloys
12. Beryllium
HEATING DEVICES
FORGE FURNACE:
Types of Furnaces
• Box / Batch Type Furnace: This type of furnace is
used for heating small and medium size stock
because they are least expensive. These furnaces
are usually constructed of a rectangular steel frame
lined with insulating and refractory bricks.
• Rotary Hearth Furnace: These are doughnut shaped
and are set to rotate so that the stock is heated to
the correct temperature during one rotation. These
are heated by gas or oil.
Box / Batch Type Furnace
Rotary Hearth Furnace
Rotary Hearth Furnace
Types of Furnaces
• Continuous/ Conveyor Furnace: They are generally
used to heat one end of the larger workpiece. They had
an air or oil operated cylinder to push stock end to end
through a narrow furnace.
• Induction Furnace: In induction furnace the stocks are
passed through induction coils in the furnace. An
induction furnace greatly reduces scale formation due
to oxidation.
• Resistance Furnace: These furnaces are faster than
induction furnace and are often automated. In this
furnace the stock is connected into the circuit of step
down transformer and is heated due to resistance in
circuit.
Continuous/ Conveyor Furnace
Induction Furnace
Resistance Furnace
HAND TOOLS USED IN FORGING SHOP
ANVIL
SWAGE BLOCK
HAMMER

1a. Ball Pin Hammer 1b. Cross pin Hammer

2. Sledge
TONGS
CHISEL
SWAGES

A)Top Swage

B) Bottom Swage
FULLERS

kkkkkkkkk
Flatter
HARDY OR ANVIL CUTTER
PUNCHES
DRIFTS
Forging Process
1. Open Die Forging
TYPES OF OPEN DIE FORGING
• Hand forging: Hand forging is done by
hammering the piece of metal, when it is
heated to the proper temperature, on an
anvil.
• Power forging
– Power Hammer: All power hammers employ the
same general principle of operation, a falling
weight striking the blow, with the entire energy
being absorbed by the work.
– Power Press: It is a machine tool which changes
the shape of workpiece by using pressure rather
than blow in previous case.
Forging Process
2. Impression Die Forging
TYPES OF IMPRESSION DIE FORGING
• Drop Forging: It is done with help of three
types of drop hammers. They are gravity
hammer, air lift hammer and power drop or
steam hammer.
• Press Forging: It is done in presses rather than
with hammers. The action is relatively slow
squeezing instead of delivering heavy blows
• Machine Forging: It consists of applying
lengthwise pressure to a hot bar held between
grooved dies to enlarge some section, usually
the end.
A. Drop forging
B. Press forging
C. Machine/ Upset forging
Forging Process
3. Flashless /Closed Forging
Advantages of Forging Processes
Following are some of the major advantages of forging
processes.
(1) It improves the structure as well as mechanical
properties of the metallic parts.
(2) Forging facilitates orientation of grains in a desired
direction to improve the mechanical properties.
(3) Forged parts are consistent in shape with the
minimum presence of voids and porosities.
(4) Forging can produce parts with high strength to
weight ratio.
(5) Forging processes are very economical for moderate
to high volume productions.
Smith Forging Operations
1. Upsetting
2. Cogging/Drawing
Down/Drawing out
3. Setting Down
4. Fullering
5. Edging

6. Bending
7. Punching
8. Drifting
9. Flattening
10.Swaging
11.Welding
Upsetting
Cogging/Drawing Down/Drawing out
Setting down
Fullering
Edging
Bending
Punching
Drifting
Flattening
Welding
Forging Defects
• Unfilled Section: In this some section of the
die cavity are not completely filled by the
flowing metal.
• Cold Shut: This appears as a small cracks at
the corners of the forging.
• Scale Pits: This is seen as irregular depurations
on the surface of the forging.
• Die Shift: This is caused by the miss alignment
of the die halve, making the two halve of the
forging to be improper shape.
Forging Defects
• Flakes: These are basically internal ruptures
caused by the improper cooling of the large
forging.
• Improper Grain Flow: This is caused by the
improper design of the die, which makes the
flow of the metal not flowing the final interred
direction.
1. Shallow cracks and cavities can be removed
by chipping process.
2. Surface cracks and decarburized areas are
removed by grinding on special machine.
3. Die design should be properly made taking
care of all relevant aspects.
4. Destroyed forgings are straightened in
presses, if possible.
5. Mechanical properties can be improved by
suitable heat treatment process.

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Blacksmithy shop

  • 2. • Black" in "blacksmithy" refers to the black fire scale, a layer of oxides that forms on the surface of the metal during heating. • The word "smith" derives from an old word, "smite" (to hit).
  • 3. Forging • “Forging is defined as the controlled plastic deformation of metal into predetermined shapes by pressure or impact blows, or combination of both.” • “Forgeability is the relative ability of a material to deform under a compressive load without rupture.”
  • 4. Grain Structure • Parts have good strength • High toughness • Forgings require additional heat treating grain flow (a) casting (b) machining (c) forging
  • 5. Forging Materials 1. 2. 3. 4. Aluminium alloys Magnesium alloys Copper alloys Low carbon alloy steel 5. Stainless steel 6. Nickel alloys 7. Titanium alloys 8. Iron based super alloys 9. Cobalt based super alloys 10. Tantalum alloys 11. Tungsten alloys 12. Beryllium
  • 7. Types of Furnaces • Box / Batch Type Furnace: This type of furnace is used for heating small and medium size stock because they are least expensive. These furnaces are usually constructed of a rectangular steel frame lined with insulating and refractory bricks. • Rotary Hearth Furnace: These are doughnut shaped and are set to rotate so that the stock is heated to the correct temperature during one rotation. These are heated by gas or oil.
  • 8. Box / Batch Type Furnace
  • 11. Types of Furnaces • Continuous/ Conveyor Furnace: They are generally used to heat one end of the larger workpiece. They had an air or oil operated cylinder to push stock end to end through a narrow furnace. • Induction Furnace: In induction furnace the stocks are passed through induction coils in the furnace. An induction furnace greatly reduces scale formation due to oxidation. • Resistance Furnace: These furnaces are faster than induction furnace and are often automated. In this furnace the stock is connected into the circuit of step down transformer and is heated due to resistance in circuit.
  • 15. HAND TOOLS USED IN FORGING SHOP ANVIL
  • 17. HAMMER 1a. Ball Pin Hammer 1b. Cross pin Hammer 2. Sledge
  • 18. TONGS
  • 23. HARDY OR ANVIL CUTTER
  • 26. Forging Process 1. Open Die Forging
  • 27. TYPES OF OPEN DIE FORGING • Hand forging: Hand forging is done by hammering the piece of metal, when it is heated to the proper temperature, on an anvil. • Power forging – Power Hammer: All power hammers employ the same general principle of operation, a falling weight striking the blow, with the entire energy being absorbed by the work. – Power Press: It is a machine tool which changes the shape of workpiece by using pressure rather than blow in previous case.
  • 29. TYPES OF IMPRESSION DIE FORGING • Drop Forging: It is done with help of three types of drop hammers. They are gravity hammer, air lift hammer and power drop or steam hammer. • Press Forging: It is done in presses rather than with hammers. The action is relatively slow squeezing instead of delivering heavy blows • Machine Forging: It consists of applying lengthwise pressure to a hot bar held between grooved dies to enlarge some section, usually the end.
  • 32. C. Machine/ Upset forging
  • 33.
  • 34. Forging Process 3. Flashless /Closed Forging
  • 35. Advantages of Forging Processes Following are some of the major advantages of forging processes. (1) It improves the structure as well as mechanical properties of the metallic parts. (2) Forging facilitates orientation of grains in a desired direction to improve the mechanical properties. (3) Forged parts are consistent in shape with the minimum presence of voids and porosities. (4) Forging can produce parts with high strength to weight ratio. (5) Forging processes are very economical for moderate to high volume productions.
  • 36. Smith Forging Operations 1. Upsetting 2. Cogging/Drawing Down/Drawing out 3. Setting Down 4. Fullering 5. Edging 6. Bending 7. Punching 8. Drifting 9. Flattening 10.Swaging 11.Welding
  • 47. Forging Defects • Unfilled Section: In this some section of the die cavity are not completely filled by the flowing metal. • Cold Shut: This appears as a small cracks at the corners of the forging. • Scale Pits: This is seen as irregular depurations on the surface of the forging. • Die Shift: This is caused by the miss alignment of the die halve, making the two halve of the forging to be improper shape.
  • 48. Forging Defects • Flakes: These are basically internal ruptures caused by the improper cooling of the large forging. • Improper Grain Flow: This is caused by the improper design of the die, which makes the flow of the metal not flowing the final interred direction.
  • 49. 1. Shallow cracks and cavities can be removed by chipping process. 2. Surface cracks and decarburized areas are removed by grinding on special machine. 3. Die design should be properly made taking care of all relevant aspects. 4. Destroyed forgings are straightened in presses, if possible. 5. Mechanical properties can be improved by suitable heat treatment process.