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  • Users: farmENGR
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  1. farmENGR

    grinding wheel question

    Jaydenn, You also say "if you are spinning at 40 RPM you will traverse the part in 1 minute." how are you coming up wth this conclussion?
  2. farmENGR

    grinding wheel question

    Jaydenn, You seem to have gotten very close to my result. Where does the 3.81 come from? thanks, Joe
  3. farmENGR

    Locating- GDT

    yes, thanks guys!! regards, Joseph
  4. farmENGR

    grinding wheel question

    After looking at my work i was in inches and not feet for my first calculation and after seeing feet/ min i saw i made a mistake too. I come up with 10in/12in *ft-1= 0.83 ft to tavel Turning operation: RPM= 12*V/pi * D = 12(60)/ 3.14 * 3 = 76.28 rev * min-1 0.06 and 0.06 are used as Ap...
  5. farmENGR

    Locating- GDT

    pmarc, question does not state wheather it is of asme or iso concern. Locating can be divided into three broad categories. I don't know these three categories. examples are: plane, irreg, radial, OR radial, irregular, and concentric. And a few other choices. I never learned gdt in school...
  6. farmENGR

    grinding wheel question

    Occupant, STNMan calculated 33 minutes and you calculated 3 minutes. Something doesn't seem right
  7. farmENGR

    Reamer question

    thanks Ajacks
  8. farmENGR

    Locating- GDT

    On the topic of 'locating' what are the three broad categories? I think it is irregular, concentric, and plane. I could be wrong. It is a hw question that i can't seem to find in the book or online. thanks
  9. farmENGR

    grinding wheel question

    i do not understand what you have done. can you explain?
  10. farmENGR

    Pipe Flow from resovior to machining center

    28-32m/sec came from our parent company. They are european and design and modify alot of their machines for our business. Yes, i agree it will be alot of fluid spraying at the grinding site.
  11. farmENGR

    grinding wheel question

    i get 28.2 minutes. I don't think that is right though. I am using the time to machine equation for a turning operation. Tm= (L + Ap + Ao)/ f x rpm The rpm i find is very low. 14 rpm
  12. farmENGR

    grinding wheel question

    Hi all, I am looking to find how long it takes a grinding wheel to tavel 10'' along a workpiece. The grinding wheel revolves at 60 fpm. My grinding wheel is 16'' in OD and 1'' wide. The workpiece diameter is 3''. feed is 1/4'' per revolution. I cannot seem to find the correct equation. thanks
  13. farmENGR

    Reamer question

    Hi all, If a reamer cuts oversize and leaves behind a bellmouthed shape at beginning of the hole. What is my problem? Do i need another reamer or is it the alignement of the work piece with the tool? thanks
  14. farmENGR

    Pipe Flow from resovior to machining center

    Ha. I understand you know more about this than i do. I will need to consult with the machine maker? about the discharge capacity as well as the operating point. I don't quite understand the direction i need to go in. I believe our parent company reduced the size of the pipes and made sure...
  15. farmENGR

    Pipe Flow from resovior to machining center

    cvg, The machinings have their own pumps as well. I think we can use the same piping and simply turn up the velocity of the pumps in the machines. There is a value you can change on the controles. Then we can measure the flow rate. I am looking for 84l/min with the given pipe flutes i have...
  16. farmENGR

    Pipe Flow from resovior to machining center

    pumps are centrifugal
  17. farmENGR

    Pipe Flow from resovior to machining center

    I could probably get the pump curves if needed. System loss can be calculated as well then. I believe our parent company had our supplier of the resovior modify their design so that each machine has its own pump. I don't know how they approached the problem but they are just telling us to...
  18. farmENGR

    Pipe Flow from resovior to machining center

    we need a certain velocity so that as the material is ground it is removed in the same pass. To do this we must match the grinding wheel speed to the velocity of the oil. I think we can use the same piping. All we have to do is increase the velocity of the pumps inside the machines to...
  19. farmENGR

    Pipe Flow from resovior to machining center

    Only 1 feedpump runs at a time. The other is a autobackup. Feed opening lines are 2'' female parts. I calculate my velocity to be between 22-32m/sec with either a 3m or 2.5mm OD pipe ID. To acheive the second velocity i will need to increase the velocity of the machine or increase the...
  20. farmENGR

    Pipe Flow from resovior to machining center

    high pressure pumps by Grundfos 50 HZ 3Mot. filter pump is a mtr15-12/2. what does this mean? The lines coming off the pumps are bigger and seem to have a thicker wall than coolant lines in the machines. There is a filter pump, fast fill pump, presure flash pup and cooler pump.

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