Results 41 to 60 of 68
09-24-2011, 05:34 PM #41
The yellow line indicates the positioning of the sheet against a back-gauge for a down-stroking press brake, before the press action.
The green line indicates the positioning of the sheet against a back-gauge for an up-stroking press brake, before the press action.
Here instead of adding a base to the modified die, the red area indicates the edge of the top die holder which must be machined off to stop fouling the sheet at a 45 degree up angle.
Here note the edge of the die labelled "L" is at a sloping angle to the vertical. The reason for this is to provide a positioning stop for the sheet (as an alternative or additional stop to the use of a back-gauge stop) to allow space between the corner of the previous bend in the sheet and the edge of the die, to allow for the sheet being pulled in by the bend. The "L" angle shown is for illustrative purposes only. I have not worked out what the angle should be for best results yet.
If folding 2m x 0.5m sheets, the longest unsupported length is 0.5m, not much longer than a steel ruler, and at 0.9mm it will be thicker, so plenty stiff enough to support its own weight. So what if it vibrates briefly when the press is done? No problem.
On the other hand, if a special corrugating die set is used, then the sheet does not need to be flipped over at all.
See the shape of the modified die in this post, in particular the line labelled "L" in the diagram which is one way to deal with the issue you correctly raise. A CNC controlled back-gauge can also stop the previous bend of the sheet being positioned too close to the die.
09-26-2011, 09:51 AM #42
09-26-2011, 05:00 PM #43
Guys, dont waste time on this mans request untill you -
1 - Google '"peter dow" corrugated'
He's been on almost every forum arguing & causing trouble
2 - Read this > Meet the lonely heart from hell - The Daily Record
3 - Read his website > HERE
He lives on state handouts in a 1 bed flat & see's himself as the head of state in Scotland
A few peter dow Quotes-
Only now with the advent of the internet can intelligent educators such as myself start explaining the truth. However, it is hard work and the chances are that only when what I am saying appears on TV will most people actually be able to understandAustralian bush-fires: mass manslaughter by the Queen
09-26-2011, 06:39 PM #44
That's fucking hilarious. I love the hip to waist ratio in women searching that should be a post in the Meteorology section :-) heck a certain Dutch man would probably make him a custom measuring device :-)
Jugs, you have truely shown us the light on this one :-) We truly owe you a great debt to the service and time savings your post has saved UK Practical machinist members.
digger doug liked this post
09-26-2011, 08:47 PM #45
HAAA.... HAAAA .... HAAAAA.... HAAAAAAA......
I knew something just wasn't ''right'' with this guy.
09-26-2011, 09:10 PM #46
Last edited by FishTaco; 09-26-2011 at 11:13 PM.
09-27-2011, 01:49 AM #47
09-27-2011, 04:31 AM #48
09-27-2011, 05:04 AM #49
Getting back on topic to practical machining ...
The press brake double V-die tool, the Amada 12206, can be custom modified by grinding to allow the tool to "revisit" previously formed corrugations to allow the bends to be selectively increased to curve or straighten panels.
Amada quoted £226 or $350 extra for the modification in addition to the £127 or $200 for the cost of the standard tool. Maybe a practical machinist here can quote to modify this tool?
09-27-2011, 08:20 AM #50Amada quoted £226 or $350 extra for the modification in addition to the £127 or $200 for the cost of the standard tool. Maybe a practical machinist here can quote to modify this tool?
Thats a good price for tool + modification,- go for it,
- most places I know with the equipment to do that, would charge you £250/300 just for the modification. (so your getting the tool for free, that should appeal)
Thats what I would charge you + tool +transport + vat @ 20% -cash up front.
cant see any one daft enough to do it cheaper, as you've already found out.
So now that's sorted, just take it to your local press shop & pay them to work your tool for you,
while you get on with more important things.
10-04-2011, 07:30 AM #51
10-04-2011, 09:49 AM #52
thermite liked this post
10-05-2011, 10:00 PM #53
On the basis of population, I'm sure us yanks have more nutters, because we have more people. But how about on a per capita basis? More nutters per thousand population? I don't quite know how to approach the issue.
And then there's the degree of nuttiness to consider. Does one REALLY crazy person outweigh two who are just mildly weird? The UK has a great reputation for harboring eccentrics, but is this based on reality, or is do you have a better PR firm? Perhaps we actually have more eccentric people, but you guys count better?
Counting poses more problems. Suppose you have a schizophrenic person with three personalities, and they're all weird. Does that count as three separate nuts?
These are the ideas that kept me from getting into the really good schools. . ..
Hip-to-waist ratio for child-bearing?? Ok, this round goes to the UK
But we'll be back
10-06-2011, 07:20 PM #54
adama liked this post
10-07-2011, 03:25 AM #55
10-07-2011, 04:47 AM #56
10-07-2011, 10:17 AM #57
TeachMePlease liked this post
10-07-2011, 12:24 PM #58
Nah ones trying to make posh corrugated iron, the others trying to solve the worlds energy needs by proving everyone on the planet to date is stupid and has solved the perpetual motion problem.
At least Posh corrugated irons possible and could be done :-)
Ie they may both be a bit eccentric, but at least ones governed by the current laws of physics.
10-07-2011, 01:36 PM #59
10-07-2011, 01:56 PM #60
You poor Yanks and Brits.
At least all us Canucks know that antimatter can only work if you use stainless for the vessel and of coarse the sheets would need to be corrugated.