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1:09 AM
October 11, 2010
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A short time ago I was scrolling through the product list at DGI and came across this product from Kurt.
It is a tooling fixture that replaces three common vice tools; parallels, vice stop, and angle blocks, as well as one they didn't think of is a V block. This tool works by placing pins in strategic holes to allow for them reference the workpiece in a respective orientation and replicating several different tools. As amazing as this product is, it comes at a fee, it costs as much as a 6" glacern vice. So as any hobbyist would do I have decided to make this item my self. I have already figured out the hole placement for this product and have finished a drawing plan. I would love to share the plans I have made for this, but the problem is that this was recently patented and is not yet in pubic domain so I may be in violation of an intellectual property law.
3:28 AM
October 14, 2010
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Hey, that's pretty cool Alex! The only potential problem I see is getting chips in those holes making it difficult to clean out, but that would be more of a problem only in high production applications.
Chris
4:57 AM
November 15, 2010
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Nice! Kind of like the A2Z sacrificial tooling plate/table for Sherline mills. I would imagine that as soon as you change any dimensions or make any improvements the patent issue is irrelevant, but there are better people than me on this list to advise you on that—
8:13 PM
January 9, 2009
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These seem pretty cool. Please PM me so I can take a look at the plans.
One question tho, I'm having trouble visualizing how you would use the plates as a vblock. Can you fill me in?
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10:17 PM
October 11, 2010
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Patent lawyer can be vary aggressive, and I'm afraid that I have already crossed a line, with posting this topic. I hope that I could make a compromise and later send some images of the finished product. As for the V block, imagine a cylinder that is half an inch tall and with a diameter of two inches, and you wish to mill a flat or drill a hole as if you were making a hole for a set screw, then you could place two pins in the jaws about one inch apart and it will cradle the work piece between the two pins. In a production environment hundreds of parts can be made with perfect alignment.
Also to respond to i44troll's comment, residue free painters tap can be used to fill the unused holes.
11:20 AM
January 9, 2009
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Painters tape, now that's a good tip! I've got a few holes on my machines that are constantly gathering chips (like the holes for the steady rest that bolts to my apron). I'm going to cover these with painters tape the next time I clean my lathe.
Thanks for the tip! It's one of those "why didn't I think of that?" moments.
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11:42 AM
October 14, 2010
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The job-shop that I worked at previously had several fixture plates that had tapped holes all over the surface per every square inch. To keep those holes from being filled with chips they inserted set screws in every tapped hole. The idea was to remove only the screws that were necessary for the setup. Problem not solved! Every hex drive-hole opening had to be cleaned out before you could ever get the set screw out of the hole!
I made it a habit to position my coolant jets downward and program a toolpath (coolant path!) that went over every tapped hole repeatedly while I went to get my tools, fixtures, and program materials. By the time I had everything available and ready for the job the chips were clear and I could then easily set the job up.
Chris
12:09 PM
January 9, 2009
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Yep, I tried set screws also, but had the same problem with chips filling the hex key hole. That's better than chips filling the threads, but only a little bit better. Clever idea to program your CNC setup like that. I'll have to remember that for when I get into CNC.
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9:17 PM
October 11, 2010
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I was thinking, where the tap can't be used perhaps wood dowels could be used as corks in the fixture plate. Just buy a yard long dowel and chop it into a hundred pieces, and when you don't need the holes plugged they could be stamped out.
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