CNC grinding method of manufacture
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    Default CNC grinding method of manufacture

    I am applying for a grinding position in which training will be provided, I currently have skills in manual milling and turning and setting and operating of CNC mill grinders. I have been given a question about the method of manufacture of a part which will determine whether I get an interview or not but I don't have much knowledge of CNC cylindrical grinding. I have attached the drawing, the material is tungsten carbide. Can anyone tell me step by step how this would be produced on a CNC grinder.screenshot_20200210_153757_com.google.android.apps.docs.jpg

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    Quote Originally Posted by luke1985 View Post
    I am applying for a grinding position in which training will be provided, I currently have skills in manual milling and turning and setting and operating of CNC mill grinders. I have been given a question about the method of manufacture of a part which will determine whether I get an interview or not but I don't have much knowledge of CNC cylindrical grinding. I have attached the drawing, the material is tungsten carbide. Can anyone tell me step by step how this would be produced on a CNC grinder.screenshot_20200210_153757_com.google.android.apps.docs.jpg

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    That's a pretty interesting pre-interview question.

    You might also consider posting this query in the abrasives section too. There's some very knowledgeable grinding folks there as well.

    What is the exact question they pose with that print ? If you don't mind me asking ?

    I'm wondering if they are testing your grinding knowledge or just basically your ability to read the print correctly and have some ability to devise sensible order of operations...

    Do they require you to sketch out some of the G code for this (in partial pseudo non machine specific G code based processes ?)

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    Quote Originally Posted by cameraman View Post
    That's a pretty interesting pre-interview question.

    You might also consider posting this query in the abrasives section too. There's some very knowledgeable grinding folks there as well.

    What is the exact question they pose with that print ? If you don't mind me asking ?

    I'm wondering if they are testing your grinding knowledge or just basically your ability to read the print correctly and have some ability to devise sensible order of operations...

    Do they require you to sketch out some of the G code for this (in partial pseudo non machine specific G code based processes ?)
    Thanks mate I'll get this posted in the abrasives section also.

    The exact question they asked is as follows

    Further to your recent email for the grinding position, please can you complete the attached test piece before we progress any further. If you can please just jot a few notes down on how you would work/programme this piece. The material is tungsten carbide.







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    Quote Originally Posted by luke1985 View Post
    I currently have skills in manual milling and turning and setting and operating of CNC mill grinders.
    What's a CNC mill grinder?

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    Quote Originally Posted by Radar987 View Post
    What's a CNC mill grinder?
    I am guessing its a across the pond term for a jig bore?

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    Quote Originally Posted by Radar987 View Post
    What's a CNC mill grinder?
    I'm guessing a cutter grinder, like an Anca or Walter.

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    I'd say the right answer is "I dont know how to do it, but I'm a quick learner". I dont see how it would be fair to the employer if we help you cheat on the test.

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    Quote Originally Posted by Aejgx6 View Post
    I'd say the right answer is "I dont know how to do it, but I'm a quick learner". I dont see how it would be fair to the employer if we help you cheat on the test.
    Also not fair to himself.

    Get a job that you'll excel in. Not a job that you'll squeak by in.

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    Quote Originally Posted by Aejgx6 View Post
    I'd say the right answer is "I dont know how to do it, but I'm a quick learner". I dont see how it would be fair to the employer if we help you cheat on the test.
    and hope your potential new boss isn't a forum member

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    Quote Originally Posted by Radar987 View Post
    What's a CNC mill grinder?
    Haas multigrind

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    Quote Originally Posted by Larry Dickman View Post
    and hope your potential new boss isn't a forum member
    I fully intend making them aware that I have no experience in this but trying to show a bit of initiative in that I've taken the time to do a bit of research

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    Quote Originally Posted by luke1985 View Post
    Thanks mate I'll get this posted in the abrasives section also.

    The exact question they asked is as follows

    Further to your recent email for the grinding position, please can you complete the attached test piece before we progress any further. If you can please just jot a few notes down on how you would work/programme this piece. The material is tungsten carbide.







    Sent from my FIG-LX1 using Tapatalk
    1. Don't cross post.
    2. Who is getting this job ? you or us ?

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    Quote Originally Posted by luke1985 View Post
    I fully intend making them aware that I have no experience in this but trying to show a bit of initiative in that I've taken the time to do a bit of research

    Sent from my FIG-LX1 using Tapatalk
    "googling" aint research.

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    Quote Originally Posted by digger doug View Post
    "googling" aint research.
    Keyboard warrior

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    This isn't helpful to the OP at all but I disagree always getting a job you excel in. Where is the fun in that? Branching out and being challenged daily is great most times.

    Sounds like he will be straight up with them and he is taking some steps to at least learn. Sometimes its hard to start without some good key words or links to get you going. Only been around those machines a few times and never ran one, would be hard to get that experience outside of a job.

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    Quote Originally Posted by digger doug View Post
    1. Don't cross post.
    2. Who is getting this job ? you or us ?
    Cross posted because I'm new to this and someone recommend I do so. Shoot me!

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    I think the correct answer would be:
    I don't know. ......
    What is the raw stock preform? Any ops before me? What machines, wheels and centers are at my disposal and time to swap wheels? What is the quantity to be run? Am I grinding all the OD features in one clamp? Do I have any controlled datums?
    YouTube
    I do not think any two carbide shops would process this part the same way and them asking such a question seems rather weird and strange.
    Grinding such out of carbide is different than grinding it out of steel and maybe that is what they are seeking.

    I do hate cross posts, once in and recommended elsewhere is it possible to delete the first or maybe a redirect message would work.
    Just had this happen, opened a clone question wondering where my post went on what insert fits.
    I'm sitting there thinking "I know I answered this, why is MattiJ's and my info not here?"
    I'm so easily confused.

    For those who do not know a Haas multigrind is a very different Haas company than the one you may be thinking of.
    That is also confusing..... German made very high precision grinders.
    YouTube
    Bob

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    Quote Originally Posted by luke1985 View Post
    Cross posted because I'm new to this and someone recommend I do so. Shoot me!

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    We are taking up a collection....

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    Would the part be manufactured from a solid piece of carbide? I would assume not, probably manufactured from a preform. There really aren't any cutting edges on the part which suggests that it would more than likely be ground on a CNC O.D. grinder like a Toyoda, Reinecker or Rollomatic.

    John

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    Quote Originally Posted by luke1985 View Post
    Haas multigrind

    Sent from my FIG-LX1 using Tapatalk
    Youre in luck Luke

    Just so happens Ive programmed and ran one of those... and worked carbide it in.

    I cant tell much from your "print", but maybe seeing the machine run might exercise your thoughts.



    Looks my my old company took down my videos.... Ill see if i can upload something to my youtube channel later on.

    EDIT:

    Here ya go



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