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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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drop forged/pressed steel ?
Hello,
Does anyone know what is the difference between drop forged and pressed steel (for scaffold couplers)? I mean what is the difference in the manufacturing process? Thanks |
#2
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#3
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So what does the "drop" mean?
Peter |
#4
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According to :
So what does the "drop" mean? The upper part of the die, a "striker" is quite massive, and is raised under power, and then released, letting gravity do the job. This has the advantage that if something is thicker than expected, and can't be crushed all the way, you don't wind up breaking gearing inside the system -- the striker just *stops*. You could even raise it with a hand-cranked system, and release it by pulling out a pin or something similar. It would just be a lot slower that way, so you would have to put the workpiece back on to heat every time you start cranking the striker to its "cocked" position. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#6
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"Christopher Tidy" .(clip) I would guess that the forged couplers will be stronger. Forgings are usually very strong because of the alignment of the grains in the metal. ^^^^^^^^^^^^^^^^^ Another reason forgings are generally stronger is that the dies can be shaped so that the metal varies in thickness as needed for strength. Reinforcing webs and radii can be designed in, to reduce stress, increase stiffness and improve fatigue life. In a stamping, the dies can stretch the material, making it thinner, but they can't make it thick and strong next to a hub, for example. |
#7
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Remember Junkyard Wars? There was an episode on curshing a car to a
particular height and one of the teams built a drop hammeer setup for doing this and they won. The other team build a press and it broke several times. -- Why do penguins walk so far to get to their nesting grounds? |
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