Measuring Thermal Damage to Steel in Grinding Process 2

[weevol]

I wish to devevelop a measurement system to assess amount of damage to hardened tool steel (approx 64 Rc)through high heat generated in grinding process. Measurement system needs to detect approaching "burn" to maximize feed rates in grinding without needing to exceed the threshold for damage to the steel to establish when the feed rate is too fast, then back off feedrate until until acceptable.

Measurement system needs to utilize non-destructive test method.

 

[unclesyd]

What type of grinding wet or dry?
What type machine and wheels?

 

[weevol]

Wet or dry, Various wheels and machines. Main objective is to determine optimum machine settings for CNC grinders, with grinding burn mostly as the critical factor. I know there are various methods to improve grinding conditions to speed up the process before burn, but, visual burn identification is hignhly subjective in my opinion.

There are two main issues I'd like to resolve before I can really experiment.
1) A measurement system that can identify when the material properties are beginning to be altered due to temperature induced into the material (tool steel) by grinding.
2) A reliable measurement system. Currently visual burn/not burn determinition is not very consistent measuring system person to person. I have asked quite a few "experts" grind wheel people, coolant people, metallurgists, others involved grinding tool steel and I haven't relly gotten very far or many consistent answers. I don't believe the answer is easy, but I believe it to be very important to grinding people and their customers. If anyone can lead me to articles, textbooks, other resources, it would be very helpful.

Thank you for your interest.

 

[Kenneth]

http://www.google.com/search?hl=en&...tion+barkhausen+X-ray+diffraction&btnG=Search

 

[waner]

hi,would sugest you contact a company called stresstech,not sure if they're swedish or finish,manufactured a system to measure the exact grinding burn value for production !!!

 

[tomwalz]

Hardness testing?

Thomas J. Walz
Carbide Processors, Inc.

http://www.carbideprocessor.com