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  1. Dobe

    RADIUS ON THE TIP OF A SPLINE

    Hello, I am developing a die that will produce an involute interior spine die. With a die I cannot have sharp corners. Is there some kind of universal size for any radius on the tips of the spline? Everything I look at shows sharp corners. I have developed the part in Gear Trax and...
  2. Dobe

    50 YF Stress Relieve

    Can I stress relieve 50YF SAE 1392 and hold the hardness? Print is asking for Core hardness Rockwell B77 MIN. If so at what temp, how long? We also melonite after forming.
  3. Dobe

    Stress Relieve

    Can I stress relieve 50YF SAE 1392 and hold the hardness? Print is asking for Core hardness Rockwell B77 MIN. We also melonite after forming. If so at what temp, how long?
  4. Dobe

    Balancing ring gear, formed flexplate and timing locator

    I have a weldment of the above parts and cannot get the balancing below .5 or below 1. We weld the flexplate to the ring gear first in a fixture. 2nd fixture welds the 1st 2 components to a hub. and then we weld the timing locator ring in the 3rd weld fixture. We are getting 2.41-2.61 for...
  5. Dobe

    SAE 1566 Material

    I would like to know what is the shearing strength and carbon content of SAE1566 material?
  6. Dobe

    Torque Testing

    We are torquing down bolt at between 48 to 54 ft. lbs. If we are consistly getting 50 - 52 what should the breaking point be when we test them? We are also auditing torque angle. I believe that is set between 10-30 degreees. [ponder]
  7. Dobe

    Stress Relieve temperature for SAE 1050-1055 material

    I am having some trouble finding info on stress relieving high carbon material? I have 1050-1055 Rb 84 min. stock. What temperature is best to take out any stresses?
  8. Dobe

    HEAT TREAT FOR 6150 COLLET

    WE HAVE BEEN MAKEING COLLETS OUT OF 6150. THE QUESTION CAME UP HOW TO HEAT TREAT 6150 FOR THE COLLET TO HAVE SOME FLEX. I HAV SOME OLD NOTES TO HEAT TREAT TO Rc42-46. DO I NEED TO GIVE THE HEAT TREATER ANY OTHER INSTRUCTIONS?
  9. Dobe

    Laser on copper plating

    I have a project where we have changed from ink stamping to lasering required info on a copper plated part. The laser has been missing letters on the copper plating. I am going to work on the intensity to see if there is any difference. I have tried buffing off some of the copper which seems...
  10. Dobe

    4140 ht verses 4142 ht

    I have a print for a housing that calls for 4142 H.T. Having trouble finding this material, but being offered 4140 H.T. What is the difference?
  11. Dobe

    re-heat treat 1095 to shrink

    I have been trying a new process for our 1095 ring, .057 thick x 1.38 ID x 2.12 OD. We normally stress relieve on fixtures, heat treat, quench and draw. We tried stress relieving without fixtures and my ID grew to 1.140 and my OD shrunk 2.11. It was only 100 pieces but was wondering if I can...
  12. Dobe

    Moving SE files to a new server

    We are currently replacing a server, and have some questions regarding copying of existing Solid Edge files from the old server. We tried this before and lost several files. Conversation between Engineers and IT: Is it possible to just name the new drive NTFS 2? (this would ensure there is not...
  13. Dobe

    heat treat SAE 1095

    I am having cracking issues after heat treat and draw. Heat treating at 1550°, quench oil is at 165°, 15 second dwell, draw on flattening fixtures at 720°to obtain a C47-52 hardness. Most all of our 1095 material is not heat treated so this is new to me.
  14. Dobe

    Geo Tolerancing of Steel Castings

    Do we need to add Geo Tolerancing to Steel Castings? And how much tolerancing on machined surfaces should we give the foundry?
  15. Dobe

    Heat Treat of 1045 material

    I have been playing around with heat treating 1045 material. I have gotten good results by raising the oxygen analizer to 66%. But I cannot explain why this works? I am trying to obtain a finished Rc25-32 after quench and finish machine off .015 machine stock.
  16. Dobe

    Heat Treat Quenching

    Anyone do or involved in water quenching, particulary 1045 material?
  17. Dobe

    Heat Treat 1045 Flame Cut Ring

    I am having problems holding Rc 25-32, heat treating 1045 flame cut rings. We currently heat treat 1045 forgings with no problems. Our process is 7.875 OD x 4.5 ID x .75 thick rough: rough machine, leaving .015 for finish machine heat treat 1575F draw 900-980F depending on results from HT Do...
  18. Dobe

    Fatigue Chart

    I need a fatigue chart for S7 tool steel. Or where to find info?
  19. Dobe

    Melonite Process

    We have several parts in our plant that are undergoing process changes for cost savings. We are changing material to 1010 and eliminating the heat treat hardening. Instead we are going to a Liquid Salt Bath Ferritic Nitrocarburizing process (melonite). Because we have a large volume I am...
  20. Dobe

    Induction heater materials

    First, I need a material that can handle high heat of over 1200 F degrees in an induction heater. The material (this is being used as a safety measure) will be designed and placed between the coil and part(the part is 1022 material). The distance between part and coil is .125, so the material...

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