Hollow Splayed Triangle In 3d

[fitzj]

http://wikisend.com/download/465250/

http://wikisend.com/download/823150/

My autocad skills are not great as you will see from the drawings but can someone help me out?

I need some help to master this project in 3d. Its a frame to hold a foam pad. From the front it will appear a 50mm deep but in reality its 150mm splayed back to fit corner of room.

I need to create flanges to assemble it after the foam is fitted so I presume rivets would do but struggling with the flanges. I would have though a 20mm flange would be enough for the rivets. Any suggestion or help would be appreciated.

Many thanks

[ReMark]

I looked at your drawings but I'm a little unclear on how the triangle is to be fitted into a corner. Is it supposed to be standing up with the top of the triangle pointing towards the ceiling?

[fitzj]

http://s1019.photobucket.com/user/fitzj/media/Triangle.jpg.html

Hope this helps

[ReMark]

OK...so it sort of looks like a speaker that is positioned in the corner of a room right up against the ceiling. Is that about right?

 

Are the front edges chamfered (beveled)? And is the front of the object slanted from the top edge back towards the corner of the wall?

[fitzj]

From the front it appears to be a Equatorial Triangle 810 by 50mm deep. Their is a flange of 20 on the front. This keep the foam in place.

At the back it is splayed back to give an overall depth of 150mm from the front. I splayed it back at 45 degrees from the 50 mm point. The back also has the 20mm flange

[ReMark]

Sorry. I have a general idea what you are talking about but unfortunately at the moment I cannot assist you. However, if you can be patient another forum member may be able to help you. When I finish what I am working on I will check back on this thread to see if you have solved your problem.

[ReMark]

I understand why the sides have to taper back since they are parallel to the walls but why slope the back of the triangle at the op edge? That part is butts up against the ceiling and isn't seen anyway.

 

The "flange", as you call it, in the front would create a 20mm deep recess for the foam right? Is it 20mm thick as well?

[ReMark]

I'm not sure I got it 100% right but this is what I came up with.

The top portion in magenta is flat and not angled since it will be tight to the ceiling.

[fitzj]

Many thanks for sticking with me. Very much appreciated.

[ReMark]

That almost looks like a three sided picture frame. It could probably be done using the LOFT command.

[ReMark]

A variation on the theme.

[ReMark]

A slightly different view.

[fitzj]

Hi ReMark

That's getting close but I feel the angle on the splay is around 45 degree to get it to fit?? More of a splay as you can see the triangle opening on the back side is very small.

[fitzj]

Some pictures I done in Photoshop.

[ReMark]

I'm not sure where we stand at this point. It appears you have the knowledge to do this.

[fitzj]

I haven't included the holes for the rivets as I am not sure how to join the unit, Just wondering if I had a 20mm flange on the inside of one side of each piece and then just three holes on the other side would I be able to use a rivet. It has to be assembled after the foam is inside. The sides are not an issue is angles splayed that need about three rivets each.

[fitzj]

I am new to autocad so its a challenge all the way. I must try the loft tool. Never used it before.

[ReMark]

Rivets? For what purpose? I'd bend/weld the whole thing. Then you would need a method for attaching it to the wall.

 

As for my version it will fit in the corner of a room just as constructed. And yes, the sides are 45 degrees. However, the way I did it means the face of the triangle is straight up and down. Is that correct or is this whole thing tilted as well? Is the bottom corner of the triangle closer to the corner of the wall than the top is?

 

What is this supposed to be anyway?

 

BTW...you indicate an overall depth on this frame of 150mm. Yet the height of the small triangle at the back as you have drawn it in your "All sections.dwg" does not match up with the overall height of the frame. So, which takes precedence? The depth? The overall depth of my triangle is 150mm.

 

Another question re: same drawing. Why are your crosshairs set to an isometric snap? If you need to draw a line at an angle either type the distance and angle at the command line, rotate your UCS or use the SNAPANG system variable to do so.

Edited April 25, 2014 by ReMark

[ReMark]

I keep thinking you are leaving information out or we are talking two different languages and something is getting lost in translation.

 

Here yet is another version.

 

The larger triangle has a measurement of 810 for all three sides. The smaller triangle at the rear has a measurement of 320.7303. Where did that come from? It was taken from one of the views in your "All sections.dwg". The front to back depth is 150. I did not measure the angle of the slanted sides.

 

The thickness is 20 as you indicated which seems awfully thick for something that is going to be riveted and not welded.

[ReMark]

No response? Alright then, guess I'll call it a day. Good luck with your project. BTW...to produce the triangle in post #19 I used the LOFT command and the SUBTRACT command. There are probably two other ways to achieve the same results but someone else will have to show you.

 

Bye.