tutorial: engineering technology topic: volume forming – hammer forging prepared by: ing. elena...
TRANSCRIPT
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- 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.
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- Volume forming hammer forging
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- Anvils top swage is smooth and hardened
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- 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.
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- Steel hearth fuel is black coal or coke Smiths hammers
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- 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.
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- Type of smith hammers recessed hammers SharpSet (flat) hammer Profiled hammerFore (Sledge) hammer
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- Black smith tongs are adapted to the shape of holding material. Tongs main parts: Jaws Lock Handle Smith tongs Wolf jaws
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- Forging temperatures in Fe Fe 3 C diagram
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- Basic forging operation at hand forging: 1. Extension 2. Smoothing / planishing 3. Shouldering 4. Ramming 5. Bending 6. Punching 7. Black smith welding
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- 1.Extension (Length forging, drawing). It is the most used operation. 2. Planishing is provided by material hammering onto set hammer.
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- 3. Shouldering is rod thinning in given length Shouldering is done on rods one or both sides.
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- 4. Ramming strengthening of semi-product.
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- 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.
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- 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?
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- Explain forge extension. Explain smoothing. Explain shouldering. Explain ramming. Explain bending. Explain cutting. Explain punching.
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- http://www.ksp.tul.cz/cz/kpt/obsah/vyuka/s kripta_tkp/sekce/03.htm http://www.ksp.tul.cz/cz/kpt/obsah/vyuka/s kripta_tkp/sekce/03.htm Strojrensk technologie, Otakar Bothe,1980