Verify paper print to CAD file so we can use the CAD models for inspection purposes

K

kdee122

#1
We have customers that provide CAD models and paper prints for the products we manufacture. The customers have so far stated that the paper print is the master and that the model is ref. only.

Does anyone have a way to efficeintly verify the paper print to the cad model so we can use the models for inspection purposes.

Many of the products that we manufacture are very complex and it can take several days to write a CMM program to inspect a part working from the paper print.

Z
 
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CarolX

Super Moderator
Super Moderator
#2
Z – Welcome to the Cove….perhaps I can help a bit with this one.



First off, that is most unusual for the paper to be the master. Usually, it is the solid model that is the master. Most modern CAD systems derive the prints from the solid model. Changes made on the print would cause issues with the model.

Why does the customer say this? Is it because of notes, dimensioning, tolerancing. I could understand that. Can you ask why, and let them know you want to use their solid models for you CMM programming. I bet they will be ok with that.

The only other alternative is to have someone go thru the print and the model and do a feature by feature comparison.
 
#3
Hello Z, and welcome to the Cove
bigwave-d2.gif
kdee122 said:
We have customers that provide CAD models and paper prints for the products we manufacture. The customers have so far stated that the paper print is the master and that the model is ref. only.
I agree with Carol. That sounds strange. Don't the prints come from the CAD model, and if not: what are they using the CAD model for?

/Claes
 

Wes Bucey

Quite Involved in Discussions
#4
Claes Gefvenberg said:
Hello Z, and welcome to the Cove
bigwave-d2.gif
I agree with Carol. That sounds strange. Don't the prints come from the CAD model, and if not: what are they using the CAD model for?

/Claes
I echo Claes and Carol. This is a situation where you need open communication with your customer, so your Quality department and his can be as efficient as possible in ensuring the product conforms to requirements. It may very well be his Quality department would enjoy the same efficiencies as yours in using CAD files (Solid Works?)
 
Q

QualityJedi

#5
If your customer states that the paper CAD is the master then you really have limited options regarding final inspection. Much like automotive inspection, when critical dimensions are called out on a print or spec sheet you should focus your analysis and measurements on what is approved for production/acceptance. If you are unsure of yourself or your decision I would agree with the advice of the previous posts and contact your customer. Another option, just to be safe, would be to submit a "First Piece" to your customer for evaluation and approval for use as your model.
 
K

kdee122

#6
I am well aware of the advantages of using the model as master. I made the switch from automotive to aerospace and the customers seem to be in the stone age. The customer/s does not update the model with regularity and we often find inconsistances between the model and the 2D drawing.

We currently are attmepting to verifiy the model to the paper print by making our own 2D prints of the model and then verifiy that the dimensions are the same as the customer supplied 2D drawing. Do you have a more effective way to do this?

Z
 

CarolX

Super Moderator
Super Moderator
#7
Can you import their model into your CAD system and then revise it to match the current drawing? This would eliminate the construction of your own 2D models.

Can you provide some more info on what CAD system you and your customer are using?

In my current position with my employer, one of my responsibilities is to import solid models from a variety of CAD programs into our system for engineering and inspection use. I may be able to give you some additional direction in this.
 
K

kdee122

#8
We use Pro-E and have currently been importing and fixing/verifying the CAD model to the "paper" print. However I need to do this in a well documented, reliable and efficient manner.
 

CarolX

Super Moderator
Super Moderator
#9
kdee122 said:
We use Pro-E and have currently been importing and fixing/verifying the CAD model to the "paper" print. However I need to do this in a well documented, reliable and efficient manner.
I don't know of any other method that would be more effcient at this time for you., unless you can get into a reverse engineering mode to create your solid. How well does Pro-E work at importing? I know we didn't select it as our import software because it couldn't support other formats.
 
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