Auger Tube Overlap

[farmerpat]

Hello!


Hopefully everyone survived beer o clock this past weekend!


I want to create an auger tube that is a piece of sheetmetal bent into a circle,and overlapped at the seem. I am having trouble understanding how to overlap the sheetmetal. I have tried creating the flat piece and bending it using two bends of different radii, but it doesn't seem right because I can not spec the overlap. I thought about extruding the tube, but am having trouble drawing the section thatI want to extrude.


Does anyone have any input as to how to create this seem? What is the bestmethod to post illustrations in mcadcentral?


Thanks!

 

[sip]

Hi, farmerpat.


Use a thin protrusion for your sketch. Make sure your outside radius is larger than the material thickness. You can upload a file in several formats using the little floppy disc in upper right.


Sip
Edited by: sip

 

[especial]

"I want to create an auger tube that is a piece of sheetmetal bent into a circle,and overlapped at the seem. I am having trouble understanding how to overlap the sheetmetal."


with wildfire2 you can easily make those overlap. can't you use the overlapped option to help you create the desire bent?


how about the bent concept used on tubes you use for exhaust in heaters, air conditioners,and fans in your home.these tubes you buy at home depot.


what are you moving feed, corn orpowder?

Edited by: especial

 

[sanjeevkar1]

i am waiting for some pictures

 

[farmerpat]

Thanks everyone for your input so far.


The augerwill be moving grain.


2007-07-31_094627_augertube.zip Please see attached file for illustrations of the tube.


Besides overlapping the seam, would it also be possible to line up two holes in the two bends? The only problem I have here is that the axes don't follow the holes when I make each bend.


I caught myself assuming there are two bends to accomplish this...is there a way to do this with one bend?

 

[especial]

unbend your circle, put your holes then bend back, i think. or just drill to match note


farmerpat why not make it out of a regular pipe? how thick is your material?

 

[farmerpat]

The holes were placed in anunbent state. A drill to match is probably a good idea. But, I still don't understand how to createa specified overlap...back to the original question... it might be a good idea to sketch the section and extrude?

Pipe will not work in this situation because diameter~270mm and thickness~5mm There will also be some cuts made in the tube, and the overlap is desired for strength.


Please keep posting thoughts.

 

[rcg137]

You can write a relation for a curve that will give you the desired overlap


extrude a surface, convert to sheetmetal partandoffset wall from the surface


Here is an example of the relation


/* For cylindrical coordinate system, enter parametric equation
/* in terms of t (which will vary from 0 to 1) for r, theta and z
/* For example: for a circle in x-y plane, centered at origin
/* and radius = 4, the parametric equations will be:
/*&nbs p; r = 4
/* theta = t * 360
/*&nbs p; z = 0
/*---------------------------------------------------------- ---------
r= 1.6 + t * (1.65-1.6)
theta= t * -360 * 1.15
z=0



View attachment 3968


Hope this helps

 

[farmerpat]

Hey thanks! That works pretty good! see attached if you are curious:


2007-08-01_112452_augertube_2.zip


So I ran into another problem. Any advice is much appreciated.


I made the diagonal cuts in the tube by two methods:


1) I unbent the tube and created a spline through a number of datum points (see attached) 2007-08-01_114030_augertube_cutflat.zipand then i can rebend it and make a flat pattern etc, no problem. But, I think I would rather make linear cuts in the tube and have Pro/E tell me the points/curve geometry when I make the flat pattern...


2)So I madethe linear cuts in the extruded tube, therefore not requiring the time to make all those datum points, but now i can't make a flat pattern. Does anyone know why I can't make a flat pattern?2007-08-01_115533_augertube_cuttube.zip It tells me "WARNING: No geometry to unbend." (the tube waspreviously ubentto make the holes)


Thanks everyone for your input so far!

 

[farmerpat]

As I mentioned above (refer to the attachments) is there any way to make the extruded cuts in the tube and then have Pro/E tell me what the dimensions of that cut should be in the flat pattern/state?

Edited by: farmerpat