Knock Outs
- Thread starter dmckee101
- Start date
HaroldL
Alibre Super User
This is one of the sheet metal formed features I have been asking for as long as I have had Alibre sheet metal. Formed features are still marked as "Accepted" and under review according to the User Feed Back forum.
Using a Dimple will not work since you need a sheared edge on the KO.
The only way I've been able to place a knock-out is to use Part Modeling features. (You need to turn of the Part Modeling Tool Bar). First use an Extrude Cut equal to 1/2 material thickness then convert the edge of the cut to a sketch which is then Extruded as a Boss to the full material thickness. I haven't been able to create the tab that holds the KO slug in place without a heck of lot more work than it's worth. But at least I get a feature that can be dimensioned on a drawing even though it is not technically accurate.
H.
v12.0
Using a Dimple will not work since you need a sheared edge on the KO.
The only way I've been able to place a knock-out is to use Part Modeling features. (You need to turn of the Part Modeling Tool Bar). First use an Extrude Cut equal to 1/2 material thickness then convert the edge of the cut to a sketch which is then Extruded as a Boss to the full material thickness. I haven't been able to create the tab that holds the KO slug in place without a heck of lot more work than it's worth. But at least I get a feature that can be dimensioned on a drawing even though it is not technically accurate.
H.
v12.0
Attachments
Ralf
Alibre Super User
...please take a look: viewtopic.php?p=29016#29016
That could help a bit...
That could help a bit...
dmckee101
Alibre Super User
Harold - I did see your previous posts (I usually search before I post) and noted the lack of the capability. I was just hoping somebody might have had a better idea than mine. It looks like you are doing your work around in part modelling. I did get a work around in Sheet Metal but it's still not satisfactory.
For what it's worth here what I did:
.Pick tab surface as sketch plane
..Draw a circle
...Create Cut.
....Create a plane offset by -.5 mm (in this case) using the tab surface as base geometry.
.....Pick offset plane as sketch plane
......Draw same size circle as previous one
.......Make it concentric with previous Cut
........Create Tab.
Ralf - Thanks but I'm trying to create knock out like you might find in an electrical junction box (at least the ones in the states). It's like a incomplete cut, with a little left in one or two spots.
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For what it's worth here what I did:
.Pick tab surface as sketch plane
..Draw a circle
...Create Cut.
....Create a plane offset by -.5 mm (in this case) using the tab surface as base geometry.
.....Pick offset plane as sketch plane
......Draw same size circle as previous one
.......Make it concentric with previous Cut
........Create Tab.
Ralf - Thanks but I'm trying to create knock out like you might find in an electrical junction box (at least the ones in the states). It's like a incomplete cut, with a little left in one or two spots.
*<[]
{>