Problems while creating the holes on the unfold parts , fold it back and assemble it

[madhu.rajagopal]

Hello All ,

Sheet metal : I am madhu , i am facing  problems while creating the holes on the unfold parts , fold it back and assembly it , suppose we have two semi-circular parts with counter flanges with different angles ( example 160 and 150 degree ) & there are radial holes on both the parts which has to be aligned during assembly ,i tried creating holes from the Centre of the flat sheet & fold it back, i did not work though ,  i have attached the inventor assembly files , can somebody help me in resolving this ,

[madhu.rajagopal]

Hello All ,

Sheet metal : I am madhu , i am facing  problems while creating the holes on the unfold parts , fold it back and assembly it , suppose we have two semi-circular parts with counter flanges with different angles ( example 160 and 150 degree ) & there are radial holes on both the parts which has to be aligned during assembly ,i tried creating holes from the Centre of the flat sheet & fold it back, i did not work though ,  i have attached the inventor assembly files , can somebody help me in resolving this , 

[CCarreiras]

You must add here the parts also (ipt files), iam file doesn't bring the parts inside only the info on how they are connected in the assembly.

[madhu.rajagopal]

adding the part files .

[JDMather]

You did not use a common datum for the location of the Holes?

...and

because your cylinders are different radii the arc length along curve should be different.

(1.418 along a smaller radius is not the same a 1.418 along a longer radius (in terms of angle of rotation.))

The easy way to model this is by multibody solids and push out the assembly

or

locate the holes along the arc in the Contour Flange sketch... and get Arc Length.

If you can't figure it out - post back and I will finish the solution.

In the end - you can use the Origin Planes to assemble.

[johnsonshiue]

Hi Madhu,

In your case, the holes are drilled in flattened state. After Refold, the holes are no longer cylindrical. This is why Mate constraint may not work. You could create two workpoints from the hole loops. Then create a workaxis from the two workpoints. In this way, you can create a Mate constraint to align the workaxes and also another Mate to coincide the workpoints.

Many thanks!

[madhu.rajagopal]

thank you @JDMather , i tried the multi solid method it did work for me ( refer the attachment) , but how to modify the individual parts later if we have too , please comment .

and 

can we copy the sketch from one part to another and to create counter flange , please comment

[JDMather · Accepted solution]

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@madhu.rajagopal wrote:

thank you @JDMather , i tried the multi solid method it did work for me ( refer the attachment)...

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In the real world will the holes be made in the flat state or in the folded state?

(Normally the holes are made in the flat state - in which case your technique is not 100% correct.)

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@madhu.rajagopal wrote:

...but how to modify the individual parts later if we have too , please comment .

Modify them in the original part - the derived parts will update.

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@madhu.rajagopal wrote:

...can we copy the sketch from one part to another and to create counter flange , please comment

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Or you could Derive only the sketch for each part from the master into new parts.

(Would need to follow a slightly different technique for deriving sketches.)

[IgorMir · Accepted solution]

Hi,

Here is a set of files (IV2020 format) to top up your collection of solutions to your question.

Cheers,

Igor.

[madhu.rajagopal]

Hello IgorMir,

thank you , the solution is working for me .