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  • Users: Zinov
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  1. Zinov

    Measure tool wear using vibration or cutting force measurement?

    We had devolopped a new system to monitor wind turbines installed in the ocean. Once the accelero are in place no manual handling is needed. So for a machine shop it is much easier. For your tool brekage in engine blocks,a classic pb, you should start with stub drills or short series drills, ask...
  2. Zinov

    Measure tool wear using vibration or cutting force measurement?

    We have already developed system to do that for high speed machine tools. It works very well. It works for other machinery (pumps, compressor, gear boxes etc..) We have portable kit where you can install the acc. on the non-rotating parts of the spindle. Collect the signals analyse them and have...
  3. Zinov

    Moving into production engineering

    NOOOOooo....don't do it!! you will scrap your life !! Just kidding you. Good luck :)
  4. Zinov

    What exactly is a "rough" surface?

    Forget Williams and Kapoor....these are academics :) Rough or smooth depends on the intended use of the surface. How to measure roughness : profilometer (contact, contactless),comparison (existing samples) Profilometer can provides at least 30 parameters to measure the roughness of a surface...
  5. Zinov

    17-4-PH trim material

    Do you need mechanically stronger material than SS410 Do you need more corrosion resistant material than SS410 17-4PH;SS455C; why not SS420... Zinov
  6. Zinov

    Hi everyone, I am looking for co

    Thanks to All, The parts size is approximately 3.5''x1.5''x0.5''. It is an assembly that shows some <wing> mechanism. RP followed by sanding and painting may produce something acceptable. but not durable. Paint cracks and the model becomes non-presentable. we paid around 5000$ for scaled samples...
  7. Zinov

    Hi everyone, I am looking for co

    Hi everyone, I am looking for companies that can produce realistic marketing products. Like reproduce any the 3D model from glass or high quality coloured plastic. All I found is companies selling pens, cups ,USB which is not what I'm looking for. Rapid prototyping did not produce good finish...
  8. Zinov

    Hello Everyone, Thanks for reading

    Hello Everyone, Thanks for reading my post. I continue to check the resistance of my <tubes> to torque load on solidworks. I have a high discrepancy between FEA and hand calculation Please see attached file for results :167 MPa (by hand) and 402.3 (Cosmos) My questions are : 1-Is my hand...
  9. Zinov

    Help Needed : torque verification

    Thanks mmar, it works, I am@95.6MPa with the new plot. Thanks for the help, Zinov
  10. Zinov

    AL 6061- T6 Alternate

    AA2024
  11. Zinov

    How to calculate the strain of the machine?

    Hoezap, If I am not wrong ; ISO 8688-2:1989 (Tool life testing in milling -- Part 2: End milling). MQL, stands for minimum quantity lubricant or in machinist language --Mist It is a low quantity of oil ejected in the tool nose (go to utube and see lot of shots about it). It was a pleasure to...
  12. Zinov

    Help Needed : torque verification

    Thanks Rumandcola, can you please give me more details on how to do it? Any reference, that can help, will be appreciated. Thanks, Zinov
  13. Zinov

    Help Needed : torque verification

    Hi everyone and Thanks for reading the post. My hand calculation and FEA did not match at all for a new model I am working on it. Therefore, I created a very simple model to make FEA verification. Surprisingly, the results did not match at all. Please see the attached file for the details of the...
  14. Zinov

    How to calculate the strain of the machine?

    Hi Hoezap, concerning your last question : Curled and black, in my opinion this means high vibrations (I expect there will be strips on the back of the chips). In addition, the tool should be under high temperature. Use coolant or MQL. Take care with cast iron and check your pumping filters...
  15. Zinov

    How to calculate the strain of the machine?

    Hi hoezap, Could I say that reducing the inserts passing frequence of 30% I can also reduce the vibration of 30%? When you reduce the tooth passing frequency you lower your exciting frequencies. By lowering the exciting frequencies, you are allowing the machine-tool-structure <to do its job> or...
  16. Zinov

    How to calculate the strain of the machine?

    Hi hoezap, The good thing about the face mill ,in the link, that it has an odd teeth number! In my opinion this will help to reduce vibrations. Personally I prefer face mills with odd teeth numbers. the maximum number of teeth cutting simultaneously can be estimated using the following equation...
  17. Zinov

    How to calculate the strain of the machine?

    Hi hoezap, If you want to play with the cutting parameters to reduce vibrations here some clues : 1-You can reduce the number of inserts on your tool ; the machine runs@383rpm (6.38Hz), let's assume that the face mill has 12 inserts--the insert passing frequency is about 75.56 Hz which is the...
  18. Zinov

    How to calculate the strain of the machine?

    Hi Hoezap: <what is the maximum allowed displacement of the spindle head at your operating speed (generally it is curve or tabulated data, it can be found in the maintenance document)> I will reformulate : For each spindle there is curve : displacement vs speed. In the x axis of the curve you...
  19. Zinov

    Cutting tool failure

    Hi Steel, Would you please name things with their names: Meaning use less 'it', 'them' ,'ones' For example :'ones' refer to tools or gears A clear text will be helpful for everyone. Thanks, Zinov
  20. Zinov

    304 vs 316 stainless steel for shafts.

    I will use 17-4PH or SS455 both heat-treatable. Unless your application needs non-magnetic grade than you should stay in the 300 series. another reason may be the room operating temperature if you have risk of brittle-ductile transition you should stay with 300 series. Finally in term of...

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