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Anonymous Poster

Machine Size Scaling Question

02/07/2011 6:54 PM

I have a question that always seem to replay in my mind!

As an operator it looks like some machines within 3 or 4 sizes are

just scaled up clones.

Is it possible after realizing a working proven design to simply scale up all parts within a cad. prgm. and build it?

Or does every structural part see different stress/loads for each

size machine therefore must be reengineered from scratch?

Just curious.

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Guru

Join Date: Jun 2009
Location: South of Minot North Dakota
Posts: 8376
Good Answers: 775
#1

Re: Machine size scaling question.

02/07/2011 7:31 PM

Yep. Sometimes thats about all there is to it. Make a good reliable design and then just copy it onto smaller and larger versions.

I think some auto makers could do well to learn from this opposed to spending billions retooling and redesigning everything every time they come out with a new model.

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Anonymous Poster
#2
In reply to #1

Re: Machine size scaling question.

02/08/2011 8:06 AM

Thanks for relpy.

That makes computers a very powerfull tool.

Amazing,didnt think it would be that easy.

Thanks

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Guru
Hobbies - DIY Welding - New Member

Join Date: Apr 2008
Location: Bristol, Tennessee
Posts: 1177
Good Answers: 58
#3

Re: Machine Size Scaling Question

02/08/2011 3:33 PM

Close, but no cigar. Shafting, bearings, pulleys and gears come in fixed sizes. Machines move up in increments, according to what is available. Manufacturers will use mass produced components to control costs. Custom castings and sheet metal can be incorporated to maintain a certain corporate look, but everything custom is expensive. Competition forces manufacturers to keep costs down. You can't just blow up a drawing and make a bigger one.

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mike k
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Anonymous Poster
#4

Re: Machine Size Scaling Question

02/08/2011 8:07 PM

OP guest here.

Large international companies like Cat. Hitachi Komatsu etc. is my target of question.It appears they mass produce most parts themselves.

So would this be just a scaling issue to them ?

Has anyone out there engineered machines for these companies.

I guess my core question is do fabricated parts strength/size relationships change

proportionally, within reasonable size ranges say +- 40%?

I have been runnig them for 30 yrs. and am becoming quite amazed what they have become in terms of smooth controlled power.

I have many quandries of the secrets behind the engneering.

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