Expand parts using a cone

[md63825]

I am trying to figure out a way to expand four fingers that are constrained to slide in one part with a cone shaped driver. The orange areas of the fingers have the same taper as the green area on the driver. I have tried using the inside tangent constraint and it doesn't work. Any ideas?

[Anonymous]

Use a mate constraint but do a "select other" until the axis disappears and
only the face is highlighted on each conical face.

QBZ


wrote in message news:5114948@discussion.autodesk.com...
I am trying to figure out a way to expand four fingers that are constrained
to slide in one part with a cone shaped driver. The orange areas of the
fingers have the same taper as the green area on the driver. I have tried
using the inside tangent constraint and it doesn't work. Any ideas?

[md63825]

It will constrain but it removes all freedom of movement up and down on the cone. Fingers will not slide in and out.

[WalkerRA]

Technically the parts only "fit" in one position.

You could use the contact solver to drive the fingers out as the driver moves. Unfortunately they won't go back in as the driver reverses.

Another option is to constrain the bottom corner point of the conical surf on the finger to the driver surface.

-Russ

[Anonymous]

Russ is right! A cone-cone mate *really* only fits in one location.

A true conical slide would need the "slide" surfaces to be cylindrical.

Or, you can just fake it by using workaxes created from the "taper" sketch
line in the conical revolve feature.

DiVx codec needed to view attached animation.

QBZ


wrote in message news:5114983@discussion.autodesk.com...
It will constrain but it removes all freedom of movement up and down on the
cone. Fingers will not slide in and out.

[md63825]

I have attached a zip file which contains the assembly. If you wouldn't mind, please take a look at it, because I still can't get it to work. Thanks.

[Anonymous]

Those are all R7 Version parts.

I suppose I could do a step by step tutorial type of thing.

The Expanding Finger model had the solid definition completely disjoint from
the original sketch. It would be soooo easy to pull a workaxis off the
sketch but your sketch is on the opposite side. (how the heck did you do
that?)

Actually, it doesn't really matter! It will still work so I can move
forward.

QBZ


wrote in message news:5115556@discussion.autodesk.com...
I have attached a zip file which contains the assembly. If you wouldn't
mind, please take a look at it, because I still can't get it to work.
Thanks.

[md63825]

When I modeled this part, I revolved it from a profile and removed a .150 gap in between each finger to represent cutting the part into four pieces.and then cut three of the four sections away to leave a single finger. And when I did that, apparently of the three sections I cut away, the sketch for the revolve was on the one opposite the on left. All I would need to do, is modify the last extrude to leave the section that contains the sketch.

[Anonymous]

Can Workfeatures be arrayed in R7?? (I don't think so)

Y'see, this is why we have one freaking massive IV NewsGroup! -so we can
show you how easy it is to do things in the newer releases.

QBZ


wrote in message news:5115603@discussion.autodesk.com...
When I modeled this part, I revolved it from a profile and removed a .150
gap in between each finger to represent cutting the part into four
pieces.and then cut three of the four sections away to leave a single
finger. And when I did that, apparently of the three sections I cut away,
the sketch for the revolve was on the one opposite the on left. All I would
need to do, is modify the last extrude to leave the section that contains
the sketch.

[Anonymous]

You will have create a few sketch definitions to get the other 3 Workaxes on
the Driver in R7.

Also notice the color coded Assembly Constraint visual face feedback.

shamelessly using(marketing) R10 and Composer (symbol catalog
functionality).
(Scott will be so proud)

QBZ



wrote in message news:5115603@discussion.autodesk.com...
When I modeled this part, I revolved it from a profile and removed a .150
gap in between each finger to represent cutting the part into four
pieces.and then cut three of the four sections away to leave a single
finger. And when I did that, apparently of the three sections I cut away,
the sketch for the revolve was on the one opposite the on left. All I would
need to do, is modify the last extrude to leave the section that contains
the sketch.

[md63825]

I greatly appreciate your help, but you ended up with the same thing I was getting. I watched the video you posted and the assembly is working opposite to how it should. As the Cam Expander moves down into the assembly, it should expand the fingers and they should come back in as it comes up. Imagine O-rings in the two grooves around the fingers. The video you posted shows the fingers expanding as the Cam Expander comes up.

[Anonymous]

Bwhahahahah! sick!

You're right!

The first animation was correct with my own files.

You have to fix that wacked Expanding Finger model so that the Revolve
Sketch isn't disjoint from the resultant solid.

Should I show you how to do an animation with expanding O-Rings too??

QBZ


wrote in message news:5115795@discussion.autodesk.com...
I greatly appreciate your help, but you ended up with the same thing I was
getting. I watched the video you posted and the assembly is working opposite
to how it should. As the Cam Expander moves down into the assembly, it
should expand the fingers and they should come back in as it comes up.
Imagine O-rings in the two grooves around the fingers. The video you posted
shows the fingers expanding as the Cam Expander comes up.

[md63825]

Hey, I live my life trying to always learn new things. I'm game if you are. I was a Marine for eight years, I've been a machinist for over fifteen years, I still take college courses, I've owned my own business now for over three, and I've just started teaching a Machinist class at the University. I'm all about learning! The day I stop learning will be the day I stop living.

[md63825]

I think I fixed the finger to what you need. So, are you constraining the tapered line drawn in the sketch of the profile of the finger to the tapered surface of the Cone (Cam Expander)? Or are you creating an axis along the tapered line of the sketch and constraining to it?

[md63825]

Modified Finger assembly

[Anonymous]

I used Axis-Axis constraints to simplify things. You could constrain
directly between the visble sketches or sketch entity to faces but why make
things more complicated.

Expandable o-ring animation attached.

QBZ


wrote in message news:5115845@discussion.autodesk.com...
I think I fixed the finger to what you need. So, are you constraining the
tapered line drawn in the sketch of the profile of the finger to the tapered
surface of the Cone (Cam Expander)? Or are you creating an axis along the
tapered line of the sketch and constraining to it?

[md63825]

I got it!!!! I went back into the Finger and made the sketch for the profile visible and added an axis using the tapered line. I then went into the Cam Expander sketch and added an axis using the tapered line in its profile. Additionally, I had to create three other sketches @ 90's and create an axis on the tapered line for each of them. Then I returned to the assembly and constrained the axis of each finger created to each axis created on the cone.

Thanks a million Quinn. You da man!!!!