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  1. mechvhstech

    LEAN Certification Opportunities

    Debodine, Hopefully my late response to your post is of some help; I was busy working on my Lean Bronze Certification (SME) and have some input on the same for you. I did a lot of research on certifications before choosing LBC There are several good points about the LBC : 1. It is from SME, AME...
  2. mechvhstech

    Large Workpiece Machining

    Not to beat a dead horse, we ran into P-20 machining a few years back and for productivity gains and as a cost cutting measure switched to PX-5 (aka modified P-20-RC 29–33 prehardened ) that machines about 30-40% faster), we also changed our tooling to increase tool life -> yes we did the above...
  3. mechvhstech

    Chaplet posts for GI Grade 25

    Hello All, We use Grade 8 bolts to support chaplets in the green sand mold. We are also experiencing uneven wear on these chaplets owing to pouring temps. Does anyone have any insight to whether changing the matl. to ceramic or tool steel improve performance? Thanks. VHS...
  4. mechvhstech

    Just in Time. Ouch

    Lean principles or any other manufacturing technique has little to offer against natural calamities; what lean does promote is teamwork,standard work,kaizen etc (house of lean) that help jump back on track sooner than a mass produce ever could. The Aisin Fire was a great example of Toyota's...
  5. mechvhstech

    What is a good website to view new and up-coming technolodgy?

    www.mmsonline.com ========================================= [2thumbsup] Mech Rulz [2thumbsup]
  6. mechvhstech

    What operations ACTUALLY REQUIRE work instructions?!

    In my experience every task (simple or complex) requires an SOP (standard Operating Procedure). Each operator works in accordance to his/her technical IQ, some may find a complex task relatively simple. At Dell the simplest of tasks is time studied and performed in a standard fashion, the...
  7. mechvhstech

    Gray Cast Iron Casting Cooling

    Arun: I had a cooling tunnel with a forced air + mist cooling system. This is similar to the one I have seen with a conveyor mode. Are you familiar with such as system? Thank you for all your answers. -mechvhs ========================================= [2thumbsup] Mech Rulz [2thumbsup]
  8. mechvhstech

    Gray Cast Iron Casting Cooling

    Swall : Some of them are large thin walled castings (48" X 31" X 8") though there are a few variations. The CI grade is 25 and they are shaken out (some sand always exists therefore after cooling there is shot blast operation). As mentioned they are shaken out and transported to a cooling...
  9. mechvhstech

    Gray Cast Iron Casting Cooling

    I am a Lean Manfacturing Engineer hence my knowledge in metallurgy is limited (though my fascination for this field has lead to try and learn);.....a major bottleneck in my process is the cooling time (static air-8 hrs) after the component (gray cast iron) is cast. At what temperature can I...
  10. mechvhstech

    Inch Vs Metric Feed

    Thanks for your reply BillPSU, but I am dealing with a radial drill w/ feed. For 11 1/2 TPI it feeds @ .087", I wonder if i can use the same tool and feed at 2.2085 mm on the metric feed machine ?? Regards, mechvhs ========================================= [2thumbsup] Mech Rulz [2thumbsup]
  11. mechvhstech

    Inch Vs Metric Feed

    That is 11 1/2 or .0869" pitch. ========================================= [2thumbsup] Mech Rulz [2thumbsup]
  12. mechvhstech

    Tapping Question

    How do I tap a 1.5-11.5 TPI (feed .0869")on a machine that has all metric scales? Thanks, -mechvhs ========================================= [2thumbsup] Mech Rulz [2thumbsup]
  13. mechvhstech

    Inch Vs Metric Feed

    I am spec-ing out a radial drill for our Chinese operation. All our specifications are in inches and the machines available in that plant are metric feed, so I installed a digital read out that helped them with the drills and feeds. But what about tapping a thread (say 11/2 threads per inch) how...
  14. mechvhstech

    Is Hydrotesting Really Necessary on Low Energy Piping Systems?

    Does the hydro test have to performed with Water ONLY? Can the same pressure be generated with a water based coolant? I guess i know the answer to this one ...but looking for comments anyways... Thanks vhs ========================================= [2thumbsup] Mech Rulz [2thumbsup]
  15. mechvhstech

    Bonding stainless steel

    Try pliobond 20 or 30 works well with galv steel sheets. ========================================= [2thumbsup] Mech Rulz [2thumbsup]
  16. mechvhstech

    Any successful implementation of 5s?

    BillPSU is absolutely right! Any kind of Lean inititation must have top management acceptance. But the system should also have overall acceptance. But remember 5 S is only a small cog in the giant leab wheel. We started lean implementation 5 years back and we are still learning...it took Toyota...
  17. mechvhstech

    marking steel for galvanizing

    We encountered a similar problem a few years back, we notched a corner to indicate galv.Seemed to work :)) -vhs
  18. mechvhstech

    Machinist sayings or "quotes"

    My two cents : 1. MINE IS NOT TO ASK WHY MINE IS JUST TO TOOL AND DIE ! 2. NUT SCREWS WASHERS AND BOLTS! (a little risque but quite a fav.) 3. WE LEAD AND QUILL NO BUGS BO BYTES :)) ! Regards, -vhs
  19. mechvhstech

    Hurco vs. Mazak

    The prime concern of any equipment purchase is the budget. There is no comparison between the Hurco and the Mazak. Would you compare a Honda Civic to a Lexus ? Again almost everything depends on your budget, how many shifts are you running , what is your ROI, are you going to lease the piece of...
  20. mechvhstech

    Lean manufacturing

    In principle, lean is not to be viewed as a tool, it is more like a tough manufacturing management. Everything is inter-related. Last year we achieved 65% reduction in lot size and 80 % reduction in set up times across all product types… All this was possible only because we identified the...

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