modeling human hand

[2ms1]

I am new to CAD and am designing an artificial hand structure
constituted of artificial bones and tendons (so I dont have to do skin
or anything). The artificial bones will actual look just like the
actual bones of a human hand though being made out of a nylon. I
would like the model to look like the real thing too. What
approach might one take in accomplishing this?



View attachment 1798

 

[Mr.Plastic]

Hello 2ms1,


Thats a Tall order for a new to cad person but, here goes...try each bone as a rotation protusion about an axis. That should help with assembly. The smaller bones in the palm might be harder to represent due to the irregular shape. The tendons are going to be tuff to do(no pun intended). Please tell us the amount of detail needed and what version of pro you are using and I am sure there are plenty of us that can help you out.


Mr.P

 

[2ms1]

I have Wildfire 2.0. As far as my skill-level, I read through the
entire Shaum Tickoo Pro/E Wildfire Release 2.0 book and did every
tutorial in it. So I think I have been introduced to decent
wealth of the standard features. In the last chapter where he has
you build assemblies piece by piece w/o any individual instruction
(instruction only for assembling but not for making the indi components
themselves) I had no problem making all the various parts quite
efficiently. However, those were all standard hardware sorts of
things with very uniform geometry. I haven't a clue right now how
to make one of these bones with all its 3d non-uniformity.



The idea of rotation protrusion is a start however I think I would like to include even more variation if possible.



Edited by: 2ms1

 

[Mr.Plastic]

2ms1,


Ok, I made a rotation protrusion (Dog Bone) then used >insert>advanced>solid free form and pick a surface. You can make the grid fine (I defaulted 9x9) and go thru the surfaces to get the look you need. It's a start.


Mr.P





View attachment 1809

 

[megaladon]

i think free form will be the way for you to go


if you are working with the student version of wildfire i think you could use a skeleton model "no pun intended"


that way you could later control all joint angles in one part


http://www.ptc.com/cs/cs_25/howto/aba986/aba986.htm

 

[Miko]

Mr. Plastic Wrote: then used >insert>advanced>solid free form and pick a surface. You can make the grid fine (I defaulted 9x9) and go thru the surfaces.. Your idea is interesting...


I did not understant how to create it..Do you think the Deformator ofsurfaces with Restyle with polygonial mesh?Please could you upload a zipped file of your model?
Edited by: Miko

 

[dr_gallup]

For most of these applications people use 3D scan data, either laser scan or CAT scan if the original owner of the hand is still attached to it. You get a cloud of points and then create surface approximations and eventually solidify the whole mess.

 

[Mr.Plastic]

Miko,


I cannot get the zip file because today was my last day and I start at my new job tomorrow yahoo!!! outta there! Yes!


Sorry for the jubilent outburst...


I rotated a protrusion using a spline to define the shape ( I just mirroredthe spline for symmetryabout the horzaxis) to get the "Dog" bone. Then used solid free form- picked a surface-manipulated it. I then repeated that function on other surfaces.


2ms1, might try having the bones madeusingSLA, may be cheeper and quicker than having them machined from nylon. I have used a couple of good companies for getting SLA if you need.


Mr.P

 

[[-Skint-]]

2ms1, Thats a very interesting model to achieve, I would love to see the final model when you complete it. keep us informed of your progress.


Good Luck .