Pattern Layout

[G.Patton]

Hello,

I pulled this picture off another metalshaping site,
can someone explain the determining factor as to how and where the tape is to be laid out on the car.


http://www.lazze.us/album/step2pics/willysproject/week1/w00.jpg

thanks

[Wray Schelin]

Hi George,

That tape pattern has been laid out to pick up contours to make profile gages. You can see the profile gages in the right foreground. The profile gages are in effect buck stations. You only need to space them so that they pick up the surface profile information.

The gages will help you arrange the part. The flexible shape patterns help you add the correct amount of area and in the right spot.

When you have a true surface to copy it makes the job a lot easier. The best situation is to have a true surface, a good wireform/bondo copy buck, and flexible shape patterns. If you have all of those elements making panels is a lot easier. When you have all three elements of the shape you have the complete picture. Most often that is not the case when making panels, usually you have a broken bent puzzle with missing pieces. Moving the metal is often times the easy part it. The hard part is having the information to work with.

If you are doing a one off job you just don't have the budget-both money and time- to build the information you need. So what happens is frustration.

That body is a collection of very easy shapes. The Cobra nose you are doing is many times more difficult to build than that Willys.

Wray

[G.Patton]

Hi Wray,

In regards to how the tape is laid out on the
car,,What is your approach to doing that?,,space it as evenly
as possible with the occasional piece when the contour
changes?

thanks

[Wray Schelin]

George wrote:
In regards to how the tape is laid out on the
car,,What is your approach to doing that?,,space it as evenly
as possible with the occasional piece when the contour
changes?

Hi George,

It will vary according to the shape. You just have to make sure that you pick up all of the surface changes .

Spacing between stations can be 12", 8" or 6". If a lot of surface changes happen you need them even tighter to insure capturing the information.

Wray

[Dawai]

Okay, how about a computer scanner? taking a scan off a vehicle, or designing one in a 3d program. This is real complicated, it involves a laser led and webcam and a way of moving camera or part. Imagine the money to be made selling scans of antique cars.. Hey, I like money..

THEN, using a surf program to compare the bent metal with the Curvature dictated by the design, one overlapping on the screen the other showing the needed Changes to create the bent part. One on a e-wheel scanning as you wheel would be the cat's meow. Immediate change and correction to desired. Don't look down, just watch the changes. Raise this part, shrink that one. http://www.cadtutor.net/dd/studio/terrain/images/terra-02.jpg Imagine a overlay grid on that for desired outcome?

Someone with a program that could break a completed profile to puzzle like parts.. yeah.. I got to make small parts cause the big ones are so interactive with "other" bends. :idea:

No bucks needed. No tape needed, One time investment in a camera, a laptop and software.

[FriarTuck]

Being no expert here, I can see that spacing would be like the lines on a topographical map. The more information to be gathered, the closer the lines are together. I think that is just what Wray was saying. The lines need to be close enough together as needed to adequitely record the "arrangement".

Wow, I hope that didn't sound as dumb as I think it did....

Tuck

[Ernie Ferrucci]

Being no expert here, I can see that spacing would be like the lines on a map. The more information to be gathered, the closer the lines are together. I think that is just what Wray was saying. The lines need to be close enough together as needed to adequitely record the "arrangement".

Wow, I hope that didn't sound as dumb as I think it did....

Tuck
Hi tuck
Doesn't sound dumb at all, the topographical map is a good analogy. That made me think of another simple way of thinking of it: the latitude and longitude lines of a globe map, one set being the buck lines and the other being the profile gauge.

[Boogiemanz1]

Too bad we can't make a view as a relief map with the lines representing 1 inch of elevation............john

[FriarTuck]

So like on a topo, the more severe the conture, the closer the lines would be together. I think we might be straying a bit from the original question. :lol:

Tuck

[jodastream]

hi

i look for a such software someone know a good tool ?
what kind of laser will be needed ?

i know about a german software but they is only good for small pieces
and the other is a realy big 3d laserbox for scan a complete building costs over 250000.- USD :eek:

greez martin