Temperature of workpieces

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Aline Baumeister
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Temperature of workpieces

Post by Aline Baumeister »

How is your feeling about the importance of the workpiece temperature?
How do you use the functionality of compensation in your daily business: the sensor is at its standard position or do you adapt it to each workpiece individually?

And what would you think about knowing the temperature before you start the measurement?
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Tom Oakes
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Re: Temperature of workpieces

Post by Tom Oakes »

A few questions to you

What kind of tolerances are you trying to hold?
How big are your parts?
What temperature is your environment?
What temperature is your part?
“There are no stupid questions; however, they are the easiest to answer.” :o
Tom Oakes
Methods Machine Tools Inc.
www.methodsmachine.com
Aline Baumeister
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Re: Temperature of workpieces

Post by Aline Baumeister »

to keep it as simple as possible I'll take a sample application:
tolerances are <10 µm with lengths of approx. 500 mm
environment is an air conditioned measuring room at target temperature of 21 °C
workpiece temperature varies between 21 and 24 °C, sometimes higher as it comes from production areas
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Tom Oakes
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Re: Temperature of workpieces

Post by Tom Oakes »

Yes, certainly temperature compensation should be considered in this application.
“There are no stupid questions; however, they are the easiest to answer.” :o
Tom Oakes
Methods Machine Tools Inc.
www.methodsmachine.com
Frank Dr. Richter
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Re: Temperature of workpieces

Post by Frank Dr. Richter »

3°C workpiece temperature variation on a 500 mm length workpiece would lead to a geometric workpiece change (thermal expansion) of roughly:
36µm for aluminum workpieces ((24 µm/K/m)*0,5m*3K)
17µm for steel workpieces ((11 µm/K/m)*0,5m*3K)

So yes, temp compensation is important ;)

Regards,
Frank
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