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GENERATING GEAR GRINDING

GENERATING GEAR GRINDING. Infeed in mm per stroke (pass). Feed rate in mm/Rev. Shift Movement. Grinding Perfect Gears: A Tough Puzzle? . Grinding Wheels. Dressing. Machine. Perfect Gears. Coolant. Quality etc. Causes of Gear Errors: Profile Deviations .

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GENERATING GEAR GRINDING

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  1. GENERATING GEAR GRINDING Infeed in mm per stroke (pass) Feed rate in mm/Rev. Shift Movement

  2. Grinding Perfect Gears: A Tough Puzzle? Grinding Wheels Dressing Machine PerfectGears Coolant Qualityetc.

  3. Causes of Gear Errors: Profile Deviations

  4. Causes of Gear Errors: Lead Error

  5. Causes of Gear Errors: Burning & Cracking

  6. Causes of Gear Errors: Concentricity

  7. - good profile form 1 Profile Form

  8. one or two sided - diamond worn on one side - insufficent grinding allowance - insufficient amount of shifting - grit size of wheel too fine 2 Profile Form

  9. - unbalanced grinding wheel - spindel, workpiece out-of round - wrong change gears 3 Profile Form

  10. - wrong profile angle on grinding wheel - wrong value for differential change gears (AZA, NZA) 4 Profile Form

  11. - wobble, faulty fixturing tooling - tailstock centres damaged/faulty - workpiece spindle bearings damaged 5 Profile Form

  12. - unfavorable gear flank/ grinding wheel contact sequence - profile loss on wheel, shifting too small - grinding wheel too soft 6 Profile Form

  13. - insufficient profiling of grinding wheel - tooth profile of grinding wheel too thick 7 Profile Form

  14. one or two sided - root relief of grinding wheel excessive 8 Profile Form

  15. - correct alignment 9 Alignment

  16. - insufficient overtravel 10 Alignment

  17. - grinding wheel imbalance - feed per rev. excessive - grinding spindle ouf-of round - flange damaged 11 Alignment

  18. - insufficient load angle compensation - error in spindle drive system 12 Alignment

  19. - wobble, centres, fixturing faulty - tailstock centre inprecise - workpiece spindle out-of-round 13 Alignment

  20. - work head inclination angle wrongly set - backlash in change gears incorrect 14 Alignment

  21. - wrong value for differential gears - differential gear train out-of-round 15 Alignment

  22. - crowning erratic on left flank due to excessive clearance between stylus and stylus bushing (non-CNC machines only) 16 Alignment

  23. - multi-start grindng when number of teeth divided by number of starts equals even, whole number.

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