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Join Date: Jun 2007
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Drawings for Finished Parts

06/22/2007 10:02 AM

A formed aluminum part is available with no drawings. What are the presently available methods of getting a precise drawing?

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Guru
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#1

Re: Drawings for Finished Parts

06/22/2007 4:11 PM

Reverse engineering. For those who don't know what that is, you simply measure every detail and create a drawing from your measurements. No science to it.

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Guru

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#3
In reply to #1

Re: Drawings for Finished Parts

06/22/2007 8:01 PM

There's no engineering involved either. Reverse engineering is just another term for copying.

Some of the more sophisticated Coordinate Measuring Machines (CMM) will create 2D drawings (including dimensions) as well as 3D models off a sample part.

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Guru
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#2

Re: Drawings for Finished Parts

06/22/2007 5:14 PM

Is it an extruded section, a manufactured, machined or a casting?

Is it anodized?

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Guru
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#4

Re: Drawings for Finished Parts

06/22/2007 8:58 PM

So reverse engineering is.

you can measure it by either 3D coordinate machine or laser 3D gauge and then use 3D machine tools or light sense plaste to recover it.

But now people begine to use doulb eyes photo method and then through software to draw on computer.(machine version)(but not as precise as above description)

in usa there are lots of companies can do it, and so do our chinese. I can help you if you hope a cheaper price.

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Power-User

Join Date: Apr 2007
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#5
In reply to #4

Re: Drawings for Finished Parts

06/23/2007 11:44 AM

imho, there can be alot more involved to reverse engineering than just copying something, especially if it is a device, even something as simple as a bearing..........just because you measured it doesn't mean that you can make it...

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#6
In reply to #5

Re: Drawings for Finished Parts

06/23/2007 1:54 PM

Geeez reef diver, you mean that there might be certain material properties as a result of method of manufacture as well as raw material choice?

I guess there might need to be some engineering after all in the reverse engineering copying sphere.

FYI: good lab analysis would involve not merely chemical analysis but mechanical property and metallographic examination.

milo

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Anonymous Poster
#7
In reply to #5

Re: Drawings for Finished Parts

06/24/2007 9:07 AM

At the beginning of ww2, Someone sold some radial engines to the Japs. They reverse engineered them and went into the war with a bunch of engines that were not new but copies of some worn out engines. Discovering their mistake they recovered by changing the specs. Classical expample of reverse engineering by way of copying. If it is a used part be sure to allow for wear.

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Anonymous Poster
#8

Re: Drawings for Finished Parts

06/24/2007 9:31 PM

What the hell did you do that for? you know how hard I worked to develop my ideas? get rid of it.

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Anonymous Poster
#9

Re: Drawings for Finished Parts

10/30/2007 9:19 PM

Given the dimensions of a component Is there a formulae to determine the number of draws required?

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Users who posted comments:

Anonymous Poster (3); Bluestone (1); cnpower (1); Hendrik (1); Labyguy (1); Milo (1); reefdiver (1)

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