Biffi,
I would like to offer several comments concerning the wear of the crystals:
===============================================
1) Ref your comment: <<"Some reseachs say that in high temperature, some carbon electrons of the diamond migrate to steel structure which forms Fe carbides...
Regarding your question: <<"We are facing burn mark problem in centerless grinding machine.We are using roller type dresser.The coolant flow is 80 lpm.Grinding wheel drive power is 22kw.The speed,feed is at recommended levels.Do we need to increase coolant flow?Pls do give any info on this...
Check in Thomas Register.
http://www.thomasregister.com/
For Europe, you might want to try:
http://www.tremnet.com/
RamS
SAT SuperAbrasive Techniques, Inc.
http://www.IndustrialDiamondCBN.com
HectorMontalvo (Industrial),
Were you using Resin Bond CBN Centerless Grinding Wheels or Vitrified CBN grinding wheels?
The early problems which I encountered with Resin Bond CBN Centerless grinding were in Dressing the wheel. We used various Dressing Sticks, Dressing Bars which could...
Probably time to get back to the original question:
Is your Company or are you personally doing anything to help keep Precision Grinding Applications in the USA?
Or perhaps you see all of Precision Manufacturing moving to China in the next 10 years? What do you think?
What do you...
funnelguy,
I have been wondering if all we are doing is exporting our:
(1) Manufacturing Related Environmental problems, and
(2) Slavery.
i.e. Regardless of what the politicians say, every time the minimum wage goes up, more of the jobs go overseas, not that corporations wouldn't send the...
Grinder Guy,
The closest thing to this that I have seen is the Thru-feed Centerless Grinding of Fishing Poles. The parts are thrufeed Centerless ground and feed into a Curved tube which bends the poles as they exit the machine generating the taper. Lots of Set-up and playing required to...
Steve,
Great summary of recommendations for "ahloma".
I look forward to reading the responses after he investigates the points you mentioned.
He also mentioned Taper on his 8mm diameter x 205mm length part, so that I would also check the guide allignment on the regulating wheel...
kgt74,
A Pint of Bitter sounds Great! Thanks for the reply.
Yes, I would like to check out the CD on the State and Future of Indian Manufacturing. I expect that it will give clues which are applicable to solving similar problems throughout the world.
I am confident that eventually the...
kgt74,
Thanks for your Thoughtful response. A very good point to include other countries such as India in this thread and your experience with Timken USA and India brings a very good perspective. It is interesting that India is also being bypassed for China due to labor costs. Especially...
Regarding CENTERLESS GRINDING, You would still need to be more specific in your question. The best General Guide was a manual put out by Cincinnati Milacron 30+ years ago, called Principles of Centerless grinding. I believe that Krar and Oswald included most of the key points in their 1974...
As no responses to date, Try again:
Does anybody here know the difference between "Hot Pressed" Vitrified CBN and "Structured Porosity" Vitrified CBN?
Description? Applications? Where to use? Costs? Other differences? Methods of Using? Limitations...
JAB,
Just curious, Did you ever get a response to this message which you posted in 1999? I can possibly help on the grinding of Silicon-Nitride as I have been involved in the centerless grinding of WC and PCD with Diamond grinding wheels as well as centerless grinding of many Steel workpieces...
Is your Company or are you personally doing anything to help keep Precision Grinding Applications in the USA?
Or perhaps you see all of Precision Manufacturing moving to China in the next 10 years? What do you think?
What do you recommend that you feel should be done?
Note: In 1982...
The University of Toledo Micro Machining Center has been conducting research on Roller Burnishing of Universal Joint Journals for the past few years. Perhaps you could contact them.
I don't have the web site, but here is an e-mail address and they will be able to point you in the right...
What are the capabilities of your machining center? Wheel Speed? We would take it on faith that the Tool can be rigidly held and positioned, but is this, in fact, true?
What are the required tolerances which you are trying to achieve? Size? Roundness? Cylindricity? Finish? How Measured...
Vitrified CBN and Vitrified Diamond Grinding wheels appear to be increasingly successful in O.D. and I.D. Cylindrical Grinding applications of Cutting Tools, Bearings, Automotive parts, Appliance Parts, etc.
What has been your experience with Vitrified CBN Grinding Wheels? Vitrified Diamond...
There are Grinding Cycle Monitors available which can be either portable units to connect to permanent pick-ups on the machines. Alternately, you could connect such Grinding Cycle monitors to the machines on a Spot Check or Specific Problem Solving basis.
These Grinding Cycle Monitors are...
Concerning the monitoring of Chatter, I agree with Humboldt and ornerynorsk.
Concerning the correction, IF you are talking about Grinding, then:
1) Machine and Set-up Rigidity. Grinding wheel speed, feed rates, etc.
2) Grinding wheel condition as far as Wheel Trueing, Wheel Dressing, and...
JOSbcc,
You appear to be talking about a Double Disk Grinding machine with some type of Ferris Wheel or Elevator type of loading fixture to securely hold groups of parts as they pass between the Wheels. This would require rather large diameter wheels and would be great for automating the...
