Constraining holes and slots???

[Anonymous]

A typical type of bolted connection for us may involve 2 parts - 1 with
slots and the other with holes. The Insert constraint works great for
constraining a hole to a hole, but how can I constrain the hole to the slot
and still allow it to move from one end of the slot to the other? With the
translational constraint, it seems like you need a bolt or something to
actually ride on the surface of of a slot (or whatever other feature). I
would like to be able to keep the bolt/hole/slot all centered on each other
(i.e. the bolt shaft is not actually touching anything, it has some
clearance all around it). Any ideas?

Thanks,

Blane

[Anonymous]

I usually create a workplane (long axis) in each slot. I can then mate
the slot plane to the center axis of the bolt or mating hole. I also
create a work axis in the center of the slot to mate to a bolt or hole.

BTBeilke wrote:
> A typical type of bolted connection for us may involve 2 parts - 1 with
> slots and the other with holes. The Insert constraint works great for
> constraining a hole to a hole, but how can I constrain the hole to the slot
> and still allow it to move from one end of the slot to the other? With the
> translational constraint, it seems like you need a bolt or something to
> actually ride on the surface of of a slot (or whatever other feature). I
> would like to be able to keep the bolt/hole/slot all centered on each other
> (i.e. the bolt shaft is not actually touching anything, it has some
> clearance all around it). Any ideas?
>
> Thanks,
>
> Blane
>
>

--
Hal Gwin
Mechanical Designer
Xenogen

Dell Precision 650
Dual 2.66 GHz Xeon
1.5 GB DDR
Quadro4 900 XGL
nVidia 6.14.10.4345 drivers
Dell UltraSharp 19" LCD

[Anonymous]

I also make use of slotted holes, and I also make work axis at the center of
the slotted hole(s).

I do not use the Part-Bolt-Part constraint methode, I always constrain Part
To Part (bolts to be added later on).

"Hal @ home" wrote in message
news:28538495C190CD32A70538ED12FF3971@in.WebX.maYIadrTaRb...
> I usually create a workplane (long axis) in each slot. I can then mate
> the slot plane to the center axis of the bolt or mating hole. I also
> create a work axis in the center of the slot to mate to a bolt or hole.
>
> BTBeilke wrote:
> > A typical type of bolted connection for us may involve 2 parts - 1 with
> > slots and the other with holes. The Insert constraint works great for
> > constraining a hole to a hole, but how can I constrain the hole to the
slot
> > and still allow it to move from one end of the slot to the other? With
the
> > translational constraint, it seems like you need a bolt or something to
> > actually ride on the surface of of a slot (or whatever other feature).
I
> > would like to be able to keep the bolt/hole/slot all centered on each
other
> > (i.e. the bolt shaft is not actually touching anything, it has some
> > clearance all around it). Any ideas?
> >
> > Thanks,
> >
> > Blane
> >
> >
>
> --
> Hal Gwin
> Mechanical Designer
> Xenogen
>
> Dell Precision 650
> Dual 2.66 GHz Xeon
> 1.5 GB DDR
> Quadro4 900 XGL
> nVidia 6.14.10.4345 drivers
> Dell UltraSharp 19" LCD
>

[Anonymous]

I usually mate the edge of the slot to the axis of the hole with an offset
equal to half the slot width. You don't have to create a workplane this
way, but if you change the size of the slot, you have to change the offset
distance. I think both ways have merit.

-Mike

[Anonymous]

You could also create a sketch line on the part constrained to the centerpoints
of the slot ends. Then, constrain the bolt to that. This would solve the size
AND workplane issues.

--
Dave Jacquemotte
Automation Designer
www.autoconcorp.com



"mpower" wrote in message
news:3C276FA4A7CB5B435871769DDD3D83EE@in.WebX.maYIadrTaRb...
> I usually mate the edge of the slot to the axis of the hole with an offset
> equal to half the slot width. You don't have to create a workplane this
> way, but if you change the size of the slot, you have to change the offset
> distance. I think both ways have merit.
>
> -Mike
>
>

[Anonymous]

I create a small diameter cylinder (0.05" dia.) in the center of the
slot at the time of creating the slot, or add it later if the slot was
already created. The cylinder gets covered with the bolt or screw at
assembly time. I use the cylinder to project it to the mounting plate
where I place the PEM nut.

>
>
>

[Anonymous]

These are all fine suggestions, some of which I think I have already tried.
Simply getting the hole constrained to the slot has not been a problem.
However, unless I am missing something, these methods would result in the
hole either being stationary or totally unconstrained to move along (and
beyond) the long axis of the slot. I want the hole to be able to move back
and forth along the length of the slot without being able to move past the
ends of the slot. I've about decided that it can't be done, but I am hoping
some ingenious user has solved (read "found yet another required IV
workaround") this problem. BTW, like Teun, I usually mate parts to parts
and add-on the fasteners later.

Thanks,
Blane

[Anonymous]

Extrude an obround by project the slot and offsetting so the surface is the
same diameter as the screw. Now us a transitional constraint with the body
of the screw and the extruded surface. Constrain the head of the screw to
you part. It should slide along the surface you created. Now constrain the
bolt to the hole. I can post and example if you need it.