punch feature

[Zac-C]

Created my first punch....there is a couple of issues i need help with please

1. When i place the punch onto  a sheet metal metal part face it places the punch upside down

2. When i place the punch onto  a sheet metal metal part face it is placed at a 90 degree angle

What do i need to change so that it places the punch/s on top of the face and also flat on the face.....

Thank you

Inv-2013

IJC

[JDMather]

Can you attach the original *.ipt file from which the punch was created?

[Zac-C]

file attached

Are there parameter rules for applying correct size fillets as well to .ide part?

Thanks

IJC

[JDMather]

The usual practice is to make the inside (smaller) fillet radius the same as the thickness of the material (parameter).

It can be bigger, and in some cases smaller.

Since you are using 2013 it will be a while till I can post example of how to correctly model your punch.

[Zac-C]

Thank you

I do have an option to view on Inventor 2014 as well

Thanks for the fillet info

IJC

[JDMather]

The way you have created this - there are too many uneeded dependencies to place the feature.

 

Notice the projected edges, you don't want to have to pick edges when placing your punch, only the sketch point (which Inventor will find automatically).

[JDMather]

Ahhh, seems like I create this tutorial every week, but now I can't find where I posted the steps last week.

Step 1.

Create your sketch shown - notice that there is no projected geometry at all (not even origin center point).

Also it should be noted that the sketch is created on part face (not on an origin workplane).

Projected geometry would create dependencies that we don't want.

Add two perpendicular construction lines (I purposely did not make them horizontal or vertical to emphasize avoiding dependencies where possible - even though in this case it doesn't matter because the symmetry of the feature).

Create a workplane perpendicular to one of the construction lines by picking one of the construction lines and the sketch point.

Cut the hole and then start a new sketch on the user created workplane.  Project Geometry the sketch line (you might have to turn on the visibility of the sketch after making the Cut feature. 

[JDMather]

Continue the sketch (notice I turned off the visibility of the previous sketch and went into Slice Grapics (F7).

Notice the short object line highlighted red here.

You can use a "tighter" bend radius, but be sure to tie formula to Thickness variable and outside bend to inside bend so that material thickness between the bends is correct.

Continue with the sketch profile that will be used for a Revolve feature.

I use equal (=) constraints wherever logical - do not project edges (note the line highligted red was not projected).

You want to control by creating/avoiding dependencies by logic.

Might not be critical in this simple punch - but take it to the extreem now - to develope robust technique for future complex punches.

 Speaking of robustness - might need to create a table of acceptable sizes for this as certain sizes would cause the math to fail.

We will get to that (table creation).

[JDMather]

Attach your ipt file up to this step.

[Zac-C]

Thank you

File attached up to your last step

[JDMather]

Your are missing at least 4 Tangent constraints resulting in wrong size arcs.

Also, the Origin Center Point is (automatically) projected into this sketch (not shown), be sure to delete it.

[Zac-C]

Thanks Please see attached

[Zac-C]

.I did fix up the Tangent Constraints.Are you referring to the centre point at the top of the Line for revolution

[Zac-C]

What are the next steps please

[JDMather]

The power supply for my 2014 machine died - so it will be tomorrow till I can get back to this.

But you are almost done.

Revolve the sketch and create your punch tool.

Tomorrow I will show how to set up size table.

[Zac-C]

Thanks JD...i will create the punch and check back for the table

Thanks

[Zac-C]

Thanks

I have revolved and added fillet but it places the punch on an angle

Thanks

[JDMather]

I don't know what that means, "on an angle?"

There is no punch feature in the last file you attached.

[Zac-C]

Maybe i do have it working correctly...please see attached

please advise of any issues you see

Thanks