In this dwg I have been building a 3D curved fillet in a corner where two flanges meet. I use a special method to make this to ensure the fillet follows the radii of the adjacent flanges in the perpendicular planes, which share a common magnitude of radius. This kind of fillet occurs when the sheetmetal worker drills out the corner of the Alclad sheet and then bends the flanges. It reduces the possibility of cracking in the corner.
Okay, thanks to Cj7hawk I have been able to move forward with my trial of the CorelCAD software. Kudos to you Cj7hawk.
With this particular drawing, if you take the SE Isometric, you will see I built a 3D solid fillet in the corner of the two flanges, and unioned this to the plate. As far as I can tell, it follows the views and stays in the same place.
The second fillet was made the same way and in NE isometric it looks right. But it will not union. In fact there is a message when you try, "inconsistent edge-face relationships. At least 2 solids or coplanar regions must be selected."
The process I used was:
(Units in Inches)
(a) in 3D Modelling, draw a sphere Centre x, y, z = 0,0,0.160 radius 0.160
(b) in 3D Modelling, draw a sphere Centre x, y, z =0,0,0.160 radius 0.120
(c) [check both spheres are 3D solids in the property box]
(d) In 3D Modelling, Subtract the inner sphere from the outer sphere. This leaves a hollow sphere with a 0.040 wall thickness.
(d) in 3D Modelling > Home draw a circle centre x, y, z = 0.04, 0.04, 0.5
(e) in 3D Modelling, extrude Circle to a height of z = -1
(f) in 3D Modelling, Subtract the extruded cylinder (formed in step (e) above) leaving a hollow string-bead shape.
(Step (f) has the effect of providing a hole with parallel sides due to drilling while the spheres allow retention of the flange contour. )
(g) At this point it is necessary to use other 3D shapes like boxes to subtract the shell of the sphere away to reveal the curvilinear fillet solid. I did this with several operations but what ever works best may be more of a personal choice.
(h) Usually what remains is two fillets opposite each other and they can be separated and the remote one deleted with Solid Editing > Separate tool. The result is a fairly clean curvilinear fillet in the corner.
When I created the first one, I kept a sketch with coordinates on a sheet of paper. That way I could come back and re-do it if I got some values wrong and check for mistakes.
Your thoughts about what has gone wrong here would be appreciated.
Thank you. CorelCAD Alclad Base Curvilinear Fillet 11042015.dwg
Thanks again for your words of wisdom.
(1) The arc and the line were apparently not part of the union with the flanged plate. So I basically did as you suggested by removed the flanged plate from the space then deleting the arc and line with the Select All, Del steps.
(2) Alodine 1500 and 1200 tm products are a submersion corrosion treatment you can put on Alclad sheet to minimise corrosion in hostile environments. They have different electrical properties For example, you would have a bath of the stuff with suitable OH&S protections in place and dangle the plate into the bath and it would be there for a few minutes. Comes out a nice gold colour. Then you rinse it off in water, dry the plate and it's ready for use a few hours later. The cupal washer is used to separate the copper electrical terminals from the aluminium surface as otherwise corrosion may occur there. Just a scratch can start it. They were intended for high voltage/high current areas such as between ailerons and wing to discharge static and lightning strike currents. They high currents can flow through an aircraft structure including avionics ground points. (Gustav Kirchhoffs Laws 1845).
As you can see from my updated file, I cannot get the Viewport to display the flanged plate. I am also suspicious about it's colour in the Layout 1,
Isn't it meant to be magenta? Alclad Flanged Plate CorelCAD SHP200.dwg
Hmmm. That is way more complicated than I used to know working on Ultralight aircraft.... :(
Anyway, that's really cool - I never knew sheets existed - because I always use 3D model space and print to STL files for 3D printing... I guess I learnt something too.
OK, first sheets - You seem to know that - type "SHEET" and create, delete, copy , etc.
Then viewports - On a sheet, type VIEWPORT then select first corner then second corner and put a viewport to the sheet - I think you've already figured that out, but most of your sheets did not have an active viewport.
Also, here's a neat trick. Select the origin point on your model ( eg, the datum ) and use ALIGN, click on the origin, then instead of selecting a new point, type 0,0,0 and you'll realign with the datum... I didn't know that was possible before now either, but it has it's benefits.
OK, to get a model viewing in the viewport on a sheet.
Select the sheet, select the viewport within that sheet. Click on the "SHEET/MODEL" toggle down the bottom.... or use the following commands
_SHEETMODE
_MODELMODE
In Modelmode, the viewport becomes active and gets thicker. Now select the view of the model you want - eg, front, back, left, right etc. Corner, Even constrained orbit for user-customisable angles. Get it how you want. Now switch back to SHEETMODE.
That's about it - worked fine for me, even with your model - Thanks for teaching me that- I don't print stuff often, but it might become more useful to me in the future. :)
Regards
David
Corrected ( example) file below
Alclad Flanged Plate CorelCAD SHP200 sheeted.dwg
Is that what you mean?
Okay, thanks for that CjHawk.
I am actually hitting another couple of snags.
1. See in the model space here in the file attached, the big spot faced holes need to be in the Front view (not the back as currently shown) and to the bottom left running parallel with the bottom of the screen in 2D Classic view. That's because that is how I drew this flanged plate on paper and it is done to 1st Angle Projection. I know why I am getting those projections - it is because of the way I started to draw the flanges in 2D Classic view.
2. I cannot figure out how to tell CorelCAD that I am working in 1st Angle Projection for my viewport (views) on the A3-1 sheet. So my views don't look like the 1st Angle Projection the way I expect.
Bottom View
Right Side View Front View Left Side View Back View
Top View
In the model space I am seeing the back when clicking on the front an vise-versa.
I am also still have trouble with picking the proper projection e.g. side view, to go into the viewport. Can you just outline those steps for me. I think I am fluking it rather than objectively orienting and placing.
Just off the subject a little, I was trying to place a © symbol into the title block but it doesn't want to do it. Maybe finger trouble???
Thanks again....
Alclad Flanged Plate CorelCAD SHP250.dwg