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Screw connection constraints?

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Message 1 of 5
aklempner
174 Views, 4 Replies
‎12-14-2003 05:26 AM
‎12-14-2003 05:26 AM

Screw connection constraints?

Hi, I'm fairly new to MDT and I have a question about constraining parts library fasteners. If I make a screw connection with say, a bolt, flat washer, then on the otherside another flat washer, a lockwasher, and a nut, should I constrain each of these parts individually after they are placed in an assembly? It is too bad they are not placed automatically with constraints. I have a feeling that if I leave them unconstrained, I will have problems down the road, but that is an aweful lot of work. I mean if I have to do 8 of these that is 40 sets of constraints... I'm hoping someone can tell me if there is a better way to do it. Thanks.
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Message 2 of 5
Anonymous
in reply to: aklempner
‎12-14-2003 05:26 AM
‎12-14-2003 05:26 AM

Simple workaround to linder the pain:

 

- create a new local assembly named something like
"fastener-xyz"

- activate this subassembly

- make sure you are in 2d wireframe mode, so that
you can see the whole other geometry

- insert your screw connection

- exit fastener-xyz assy

- copy&constrain this fastener-xyz in as many
places you need it

This gives you a lot fewer constraints and makes
life with fastener far easier

 

Regards,
--
Leo Laimer
Maschinen-
und Fertigungstechnik
A-4820 Bad Ischl - Austria


style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
Hi,
I'm fairly new to MDT and I have a question about constraining parts library
fasteners. If I make a screw connection with say, a bolt, flat washer, then on
the otherside another flat washer, a lockwasher, and a nut, should I constrain
each of these parts individually after they are placed in an assembly? It is
too bad they are not placed automatically with constraints. I have a feeling
that if I leave them unconstrained, I will have problems down the road, but
that is an aweful lot of work. I mean if I have to do 8 of these that is 40
sets of constraints... I'm hoping someone can tell me if there is a better way
to do it. Thanks.
Report
0 Likes
Message 2 of 5
Anonymous
in reply to: aklempner
‎12-14-2003 05:26 AM
‎12-14-2003 05:26 AM

There is one good thing about having to constrain
all these fasteners - as a designer it helps you feel the pain of the guy in the
shop who actually has to put these things together.

 

I know I have reevaluated if 3 fasteners might not
do as well as five, in the old (2d) days I would have just made an array out of
the assembly



style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
Hi,
I'm fairly new to MDT and I have a question about constraining parts library
fasteners. If I make a screw connection with say, a bolt, flat washer, then on
the otherside another flat washer, a lockwasher, and a nut, should I constrain
each of these parts individually after they are placed in an assembly? It is
too bad they are not placed automatically with constraints. I have a feeling
that if I leave them unconstrained, I will have problems down the road, but
that is an aweful lot of work. I mean if I have to do 8 of these that is 40
sets of constraints... I'm hoping someone can tell me if there is a better way
to do it. Thanks.
Report
0 Likes
Message 4 of 5
aklempner
in reply to: aklempner
‎12-14-2003 05:26 AM
‎12-14-2003 05:26 AM

Thank you. That definitly will cut down on the time I spend constraining things.
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Message 4 of 5
Anonymous
in reply to: aklempner
‎12-14-2003 05:26 AM
‎12-14-2003 05:26 AM

Dave,

Excellent point!

MDT works best, if you try to think, model and
assemble the way it is done in the shop.

Regards,
--
Leo Laimer
Maschinen-
und Fertigungstechnik
A-4820 Bad Ischl - Austria


style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">

There is one good thing about having to constrain
all these fasteners - as a designer it helps you feel the pain of the guy in
the shop who actually has to put these things together.

 

I know I have reevaluated if 3 fasteners might
not do as well as five, in the old (2d) days I would have just made an array
out of the assembly



style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
Hi,
I'm fairly new to MDT and I have a question about constraining parts library
fasteners. If I make a screw connection with say, a bolt, flat washer, then
on the otherside another flat washer, a lockwasher, and a nut, should I
constrain each of these parts individually after they are placed in an
assembly? It is too bad they are not placed automatically with constraints.
I have a feeling that if I leave them unconstrained, I will have problems
down the road, but that is an aweful lot of work. I mean if I have to do 8
of these that is 40 sets of constraints... I'm hoping someone can tell me if
there is a better way to do it. Thanks.
Report
0 Likes
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