Anglicky v odborných předmětech "Support of teaching technical subjects in English“ Tutorial: Engineering technology Topic: Volume forming – hammer forging Prepared by: Ing. Elena Nová Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.
Transcript
Slide 1
Slide 2
Tutorial: Engineering technology Topic: Volume forming hammer
forging Prepared by: Ing. Elena Nov Projekt Anglicky v odbornch
pedmtech, CZ.1.07/1.3.09/04.0002 je spolufinancovn Evropskm socilnm
fondem a sttnm rozpotem esk republiky.
Slide 3
Volume forming hammer forging
Slide 4
Slide 5
Anvils top swage is smooth and hardened
Slide 6
Free (smith) forging is divided on: 1. Hand 2. Machine Hand
forging uses hand forging tools on anvil. For smith / hammer
forging is used different machines, namely power hammer and
presses.
Slide 7
Steel hearth fuel is black coal or coke Smiths hammers
Slide 8
Hammers are made from steels with Carbon content C 0,7 to 1%.
Both sides of hammer are hardened. Recessed/stepped hammers have
hardened only surface.
Slide 9
Type of smith hammers recessed hammers SharpSet (flat) hammer
Profiled hammerFore (Sledge) hammer
Slide 10
Black smith tongs are adapted to the shape of holding material.
Tongs main parts: Jaws Lock Handle Smith tongs Wolf jaws
Slide 11
Forging temperatures in Fe Fe 3 C diagram
Slide 12
Basic forging operation at hand forging: 1. Extension 2.
Smoothing / planishing 3. Shouldering 4. Ramming 5. Bending 6.
Punching 7. Black smith welding
Slide 13
1.Extension (Length forging, drawing). It is the most used
operation. 2. Planishing is provided by material hammering onto set
hammer.
Slide 14
3. Shouldering is rod thinning in given length Shouldering is
done on rods one or both sides.
Slide 15
4. Ramming strengthening of semi-product.
Slide 16
Forged welding is the oldest type of welding. Forged welding is
done at temperature of 1300 deg. C (white heat / incandescence).
Welding is called butt weld (short rods of dia. 15mm) or
overlapping.
Slide 17
How is smith forging divided? Name forging tools. Name hammer
types? Name basic black smith works. What temperature is used at
forged welding? What is used at machine forging?