logo
NOTICE:  This is the new PunchCAD forum. You should have received an email with your new password around August 27, 2014. If you did not, or would like it reset, simply use the Lost Password feature, and enter Answer as the security answer.
Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error
Modeling a pitman arm (#2799)
Options
Go to last post Go to first unread
Previous Topic Next Topic
mikeschn  
#1 Posted : Friday, December 25, 2009 8:07:06 AM(UTC)
mikeschn

Rank: Senior Member

Joined: 8/21/2007(UTC)
Posts: 284

Thanks: 5 times
Was thanked: 2 time(s) in 2 post(s)
I only have Viacad 2d/3d. I was wondering, how one would model a pitman arm using VC. I am especially interested in how you would handle the 7 draft on the sides, since VC2d/3d doesn't have the draft command.

I've attached a sample drawing that you can use as a starting point.

Let's have some fun with this one... and share your models...

UserPostedImage

Mike...
ViaCAD Pro 12 on Windows; Viacad Pro 14 on Mac
Back to top
L. Banasky  
#2 Posted : Friday, December 25, 2009 9:00:38 AM(UTC)
L. Banasky

Rank: Senior Member

Joined: 2/16/2007(UTC)
Posts: 612

Thanks: 172 times
Was thanked: 158 time(s) in 108 post(s)
I'm thinking you want the tapered hole for the ball stud, Draw a half tapered rectangle with the 1 1/2" per foot taper. Do a lathe solid, move to position on the end of the arm, and subtract solid from the arm. Hope this helps, time is tight today, Merry Christmas.
Larry
Back to top
mikeschn  
#3 Posted : Friday, December 25, 2009 9:55:15 AM(UTC)
mikeschn

Rank: Senior Member

Joined: 8/21/2007(UTC)
Posts: 284

Thanks: 5 times
Was thanked: 2 time(s) in 2 post(s)
Originally Posted by: L. Banasky Go to Quoted Post
I'm thinking you want the tapered hole for the ball stud, Draw a half tapered rectangle with the 1 1/2" per foot taper. Do a lathe solid, move to position on the end of the arm, and subtract solid from the arm. Hope this helps, time is tight today, Merry Christmas.
Larry


That may be true, but I was playing with the forging, not the machining... actually I am just interested in how the outside of the model is best created in VC.

Mike...
ViaCAD Pro 12 on Windows; Viacad Pro 14 on Mac
Back to top
jdi000  
#4 Posted : Friday, December 25, 2009 3:05:47 PM(UTC)
jdi000

Rank: Administration

Joined: 7/29/2007(UTC)
Posts: 1,862
United States

Thanks: 1 times
Was thanked: 87 time(s) in 81 post(s)
Mike


here is a quick crack at it...


Regards

Jason
File Attachment(s):
parmji.vc3 (1,330kb) downloaded 5 time(s).
jdi000 attached the following image(s):
parm.PNG (44kb) downloaded 5 time(s).

You cannot view/download attachments. Try to login or register.
Windows 11, 10
Back to top
mikeschn  
#5 Posted : Friday, December 25, 2009 5:26:52 PM(UTC)
mikeschn

Rank: Senior Member

Joined: 8/21/2007(UTC)
Posts: 284

Thanks: 5 times
Was thanked: 2 time(s) in 2 post(s)
Good model Jason... double rail sweep! I like it...

I especially like that you added the blend radii to the parting line!

Any other ideas? Maybe a loft?

Mike...
ViaCAD Pro 12 on Windows; Viacad Pro 14 on Mac
Back to top
Steve.M  
#6 Posted : Friday, December 25, 2009 7:36:17 PM(UTC)
Steve.M

Rank: Senior Member

Joined: 6/18/2008(UTC)
Posts: 978

Was thanked: 1 time(s) in 1 post(s)
Originally Posted by: mikeschn Go to Quoted Post
Good model Jason... double rail sweep! I like it...


One of the problems with sweeping is possible self intersecting or distorted surfaces. That will probably be why Jason has added rads to the leg, rather than attempting to creating sharp corner intersections
If you look at the model posted by Jason, you can see some distortion of the sweep surface.
I think, if those sharp corners are required, then it would be easier to create sections along the sweep profile and use skin solid.

I will have a play.

- Steve
Back to top
Steve.M  
#7 Posted : Friday, December 25, 2009 10:37:35 PM(UTC)
Steve.M

Rank: Senior Member

Joined: 6/18/2008(UTC)
Posts: 978

Was thanked: 1 time(s) in 1 post(s)
Found time to have a quick play. Modeled as drawn.
Steve.M attached the following image(s):
2009-12-26_042548.png (32kb) downloaded 5 time(s).

You cannot view/download attachments. Try to login or register.
Back to top
Steve.M  
#8 Posted : Saturday, December 26, 2009 2:38:45 AM(UTC)
Steve.M

Rank: Senior Member

Joined: 6/18/2008(UTC)
Posts: 978

Was thanked: 1 time(s) in 1 post(s)
Mike,

A quick mov to show the model above. Nothing fancy in the modeling, just done to produce the model quickly/easily(I used VC pro, but used only tools available in 2d/3d)

Move direct download

Model file download

- Steve
Back to top
mikeschn  
#9 Posted : Saturday, December 26, 2009 10:22:00 AM(UTC)
mikeschn

Rank: Senior Member

Joined: 8/21/2007(UTC)
Posts: 284

Thanks: 5 times
Was thanked: 2 time(s) in 2 post(s)
Very nice Steve,

I would have never thought of splitting the model to change the elevation of the bosses. Good job on that! And thanks for sharing that movie.

I have off all of next week, so I am thinking about trying the movie thing too!

Mike...
ViaCAD Pro 12 on Windows; Viacad Pro 14 on Mac
Back to top
Users browsing this topic
Guest
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Powered by YAF.NET 2.1.2 | YAF.NET © 2003-2025, Yet Another Forum.NET