#41
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Congratulations Kent on MSOTM, you have contributed so much to these pages, so it's about time we said thanks for all your help and input.
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David Hamer |
#42
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Wow - thanks to all you guys, very much.
I keep tossing out responses to the posts I feel I can be appropriate to, and then I just keep posting the nonsense I tangle with here. So - a synopsis of the job - since I finished the last panel yesterday. (hobbling on a poached-but healing nicely- foot, and with two hands that got dinged along the way ... sigh. ) Sequence #3 -#7 ... P1030439copy.jpg P1040224 copy.jpg P1030644 copy.jpg P1110736 copy.jpg P1110733 copy.jpg Hand-held air shrinker P1110747 copy.jpg P1040206 copy.jpg P1040219 c.jpg P1040259 copy.jpg P1040264 copy.jpg Straightedge shows depth of shape = 3.5in at each end, diagonally measured across deepest shape. More coming ... Happy Fourth, and best appreciation of our Freedoms!
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. Last edited by crystallographic; 07-04-2020 at 10:45 PM. |
#43
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I subscribe with the same words
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Onorius |
#44
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Hi Kent
Thanks for sharing your wisdom and experience wish us, very much appreciated! Steve
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Steve Hamilton Hamilton Classics Auto Restoration & Metalshaping |
#45
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Well deserved Kent! More like metal shaper of the millennium
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Manny Remember that the best of men, are only men at best. |
#46
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Quote:
One step at a time! mjb
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Marc |
#47
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Congrats Kent. Thanks for all that you have contributed and made available to the community.
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Chris (trying to be the best me I can be) |
#48
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Hi Guys,
Glad to help adding what I can to the storehouse of tools and methods. Here are the last of the 9 panels needed: P1040318 copy.jpg P1040212 copy.jpg And a few misc images of the process, start to finish: AP1030226 c.jpg "Make a plan, work the plan, stick to the plan." Lines show layout of hammer pattern. I follow the pattern, keeping hit rate even so hammer pattern is consistent. BP1030237 c.jpg Oil on a steel surface is an old hammerman trick - mix kerosene and 30wt 50/50 - saves friction, grabbing, hiccups/swells in your pattern. (Or other mixes - penetrating oil and wax? - to taste.) CP1030335 c.jpg Curved marks show where shape is, and where to go. (Vague linear marks are from my flat-faced linear dies, about 1.5in long, and tapered.) DP1030463copy.jpg This is the TM Tech #6 motor that we make. It hits very hard to shape the 16 ga mild steel - shapes fast enough to gain, but not enough to overrun the operator. EP1030518 c.jpg Pretty good amount of shape + good surface. FP1030528copy.jpg Linear marks, tape boundaries starting, shape arriving to 3/4, shoulder sling needed. GP1040291 c.jpg Adding tape boundaries as we go. Linear marks show angle of shape corresponding to the way the metal opens up into the shape needed. 1/2 of panel surface is shaped here. HP1030477 c.jpg Tape boundaries show up better than black pen, after being hammered over. Panel getting close. IP1030455 c.jpg Contour of panel shows shape is near to completion. Hammering (or rolling) this shape in 16 ga stiff steel requires shoulders, arms, elbows, wrists and hands to be in good physical condition. The hammered work-hardened steel needs to be physically cranked into "flat" where the hammer contacts the sheet - OTHERWISE you just add damage rather than shape. !!! And you are also pulling and shoving and torquing the panel to follow your "PLAN" very accurately. End of day will show a good workout has transpired. JP1030480 c.jpg Late in the game like this, the panel snaps HARD into another shape, so your fingers can get tender when "chomped" between the steel jaws of the metal surface and the steel balls, below it... WHANG! Once should be enough, per panel?? Note: This big Six motor is designed to behave/perform like the other 5 motors we make and sell: Controllable at 1 or 2 hits for nitpicking, then a slow pace for very exact shaping, and a gentle lope for pacing out routine patterns, or a good gallop to get you to your destination efficiently. I used all hit-paces on these panels.
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. Last edited by crystallographic; 07-10-2020 at 02:07 PM. |
#49
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Linear dies
From looking at the top surface of the panels you can see vague evidence of linear dies being used to hammer the helix/helicoid - because the shape is "reversed" and not hollow/dished/able to hold water.
P1030050 c.jpg Basic linear die design goes way back into smithing techniques, centuries ago, evidenced by the lined hammer/anvil marks on ancient jewelry. Traditional lower dies have a straight contact area, sometimes rounded over to various degrees, sometimes flat. Helpful to efficient shape production is understanding how die vs shape geometry applies. (aside from the topographic layout of hammer patterns for shaping) The venerable hotdog die: P1110545 c.jpg Leaves this pattern (linear, thin) P1040346 c.jpg Other dies, made for specific reverse curved shapes: P1040341 c.jpg Leave some patterns like these: P1040344 c.jpg Tapered both on width and on length. (lightbulb thingie here ) This job had marks like these: P1040334 c.jpg P1040327 c.jpg P1030162 c.jpg .... Using dies 2in dia. and 3in. dia. When the panel surface can be accurately managed, large dies are helpful - if power is available. (ie: change "planishing" power UP to "PUNISHING" power.) Yes, taper on width helps promote shape efficiency - and taper on length does, too ... and ... when combining both together on one complex shape: !!! (PS: I like to say it took "months of heavy drinking" to arrive at this conclusion.) Yeehaw!
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. Last edited by crystallographic; 07-10-2020 at 05:22 PM. |
#50
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Very impressed with your knowledge and skill set!
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Marcus aka. Gojeep Victoria, Australia http://willyshotrod.com Invention is a combination of brains and materials. The more brains you use, the less materials you need. |
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