Mechanical Power Transmission Series

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TN1-1 Introduction to Gear Noise

Ref:	TN1-1
Author:	J.D.Smith M.A., Ph.D., C.Eng., M.I.Mech.E.
Pages:	20
Tables:
Figures:	7
References:

Index to Paper

• 1.0 CAUSES OF GEAR NOISE
• 2.0 THEORETICAL PREDICTION PROBLEMS
• 3.0 PROBLEM SOLVING
• 4.0 TEST TECHNIQUES FOR THE GEARS
• 5.0 TEST TECHNIQUES FOR THE INSTALLATION
• 6.0 TESTING GEARBOXES IN ISOLATION
• 7.0 ECONOMICS OF PROBLEM SOLVING
• 8.0 LIGHTLY LOADED GEARS
• 9.0 DEDUCTIONS FROM T.E.
• 10.0 FURTHER READING
• APPENDIX

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Gearbox Systems: Miniature Instrumentation for Troubleshooting in Rotating Machinery Applications

Gearbox Systems: Problems and Solutions

Index to Paper

• 1. INTRODUCTION
  • 1.1 DESIGN LOAD BASED ON APPLICATION FACTOR KA
  • 1.2 DESIGN LOAD BASED ON LOAD HISTOGRAM
• 2.0 ON-LINE STARTING
  • 2A STEEL FURNACE DRIVE
  • 2B COMPRESSOR DRIVE
• 3. THE EFFECT OF ENGINE CHARACTERISTICS
• 4. SIMILAR SYSTEMS
• 5. EFFECT OF COUPLING CHARACTERISTICS
• 6. GEAR OVERLOADS DUE TO GEARCASE MOUNTING
  • A) OUT-OF-BALANCE FORCES
  • B) MOVEMENT OF AN AXLE-MOUNTED GEARBOX

 Worm Gears

Index to Paper

• INTRODUCTION
• 1.0 COMPILATION OF THE DESIGNATION
• 2.0 POWER/TORQUE RATING
  • THERMAL RATING
  • MECHANICAL RATING
• 3.0 EFFICIENCY
• 4.0 BACKLASH
• 5.0 LUBRICATION
  • OIL BATH
  • FORCE FEED
  • TYPES OF LUBRICANT
  • VISCOSITY SELECTION
  • GREASE LUBRICATION
• 6.0 DEFLECTION
• 7.0 MESH CONTACT
• 8.0 FAULT TRACIING IN WORM GEAR APPLICATIONS
• 9.0 ALTERNATIVE WORMGEAR FORMS
• 10.0 CONTACT INSPECTION AND ANALYSIS

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Gear Cutting Tools - Part 1

* The presentation contains photographs and CAD data courtesy of: David Brown Textron Power Transmission.

Index to Paper:

• GEARS.
• GEAR PRODUCTION.
• HOBS.
  • Monobloc Ground Form
  • Monobloc Unground Form
  • Inserted Blade
  • Hob Design Features.
• SHAPER CUTTER DESIGN
  • External Gears.
  • Internal Gears.
  • Basic Rack.
  • Quality
• SHAVING CUTTERS.
  • Types.
  • Helix Angle.
  • Diameter / Number of Teeth.
  • Width
  • Serrations.
  • Clearance grooves.
  • Design Life.
  • Quality

Gear Cutting Tools - Part 2

Index to Paper:

• CHOICE
  • FORMING PROCESSES
    • Milling, Broaching, Grinding
  • GENERATING PROCESSES
    • Planing, Shaping, Hobbing
  • FINISHING PROCESSES
    • Shaving, Grinding, Honing/Deburring
• SELECTION
  • GEAR SHAPING
  • GEAR HOBBING
  • SELECTION FACTORS
    • What Type of Hob Should Be Chosen?
    • Options
    • Finishing Operations
• TOOL MATERIALS
  • RELATIONSHIP BETWEEN WEAR RESISTANCE AND HOT HARDNESS
  • TOUGHNESS COMPARISON OF POPULAR HSS
  • MATERIAL REQUIREMENTS FOR MODERN GEAR TOOLS
  • INFLUENCE OF ELEMENTS IN HSS
  • COMPARATIVE HSS CHEMICAL ANALYSIS
• TOOL COATINGS
  • COATING COMPARISON
• SPEEDS & FEEDS
  • SUPER HIGH SPEED DRY CUT HOBBING
    • Comparison Test Data on Liebherr LC153 Hobbing Machine
• QUALITY
  • GEAR QUALITY FROM VARIOUS GEAR PRODUCTION METHODS
• GEAR TOOL MAINTENANCE
  • GENERAL MAINTENANCE
  • SHARPENING OF GEAR TOOLS
  • RE-SHARPENING
  • GASH RADIALITY
  • GASH TO GASH SPACING
  • GASH LEAD ERRORS
  • THE EFFECTS OF RUN-OUT
  • MINIMISING RUN-OUT PROBLEMS
  • QUALITY OF GRINDING
• IN CONCLUSION

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Index to Paper

• THE MANUFACTURE OF ENGINEERING STEELS
  • MELTING PROCESSES
  • CASTING PROCESSES
  • ROLLING
  • TESTING
  • FINAL PRODUCT
  • HEAT TREATMENTS
  • BRIGHT BAR
    • FINER FINISHES
    • THE TESTING OF STEEL
• AN OVERVIEW OF ENGINEERING STEELS
  • INTRODUCTION
    • CARBON STEELS
    • FREE MACHINING GRADES
    • CASE HARDENING STEELS
    • DIRECT HARDENING STEELS
    • STEELS FOR INDUCTION/FLAME HARDENING
    • NITRIDING STEELS
• THE ROLE OF ELEMENTS IN STEELS
• DIRECT HARDENING STEELS
  • DESIGN RELATED TECHNICAL CONSIDERATIONS
  • SOME PROBLEMS ENCOUNTERED WITH DIRECT HARDENING STEELS
    • END CRACKING
    • SURFACE DEFECTS/IMPERFECTIONS
    • HEAT TREATMENT CRACKS DIRECT FROM MILL
    • HEAT TREATMENT CRACKING - SUB CONTRACTOR HEAT TREATMENT
    • FURTHER SAFEGUARDS
  • ADDITIONAL TREATMENTS
• UNDERSTANDING CASE HARDENING (CARBURISING)
  • HISTORY
  • FACTORS AFFECTING SELECTION
  • DISTORTION
  • INDUCTION/FLAME HARDENING STEELS
  • CRACKING
  • APPARENT INABILITY TO HARDEN
  • LOCALISED HARDENING
  • CONCLUSION
  • CRACK DETECTION
  • STEELS WHICH SUIT NITRIDING, CARBONITRIDING AND NITROCARBURISING
  • STEELS USED FOR NITRIDING
  • MACHINABILITY
  • STEELS FOR NITROCARBURISING
  • CARBONITRIDING
  • PRE-TREATMENTS
• MACHINABILITY ADVANCES IN ALLOY STEELS
  • MACHINABILITY OF ALLOY STEELS
  • OBJECTIVES OF THE STEELMAKER
  • MACHINING ADVANTAGES OF INCLTISION MODIFIED ALLOY STEELS
  • SPECIALISED MACHINING OPERATIONS
    • Later Developments - mild/carbon steels
• ACTUAL CASE STUDIES - WHAT'S THE PROBLEM?
  • CASE 1: CUTTER BLADE
  • CASE 2: STEERING BUSH:
  • CASE 3: SECURITY SAFE COMPONENT
  • CASE 4: FINAL TEST RIG FAILURE
  • CASE 5: PINION GEARS - HEAVY MACHINERY
  • CASE 6: CONTROL RACK SHAFT
  • CASE 7: FILTER PLATE
  • CASE 8: SPLINED SHAFT - GLASS MAKING MACHINERY
  • CASE 9: SLIDE WAY - ENGINEERING INSTRUMENTATION
  • CASE 10: RACK SUSPENSION STUD
  • CASE 11: TRACK PIN - HEAVY OFF ROAD VEHICLE (CIVIL)

Index to Paper

• CURRENT DESIGN PRACTICE FOR INVOLUTE AND LEAD CORRECTION FOR SPUR AND HELICAL GEARS.
  • LOAD AND TRANSMISSION ERROR IN SPUR GEARS
  • INVOLUTE CORRECTION IN SPUR GEARS
  • LEAD CORRECTION, CROWNING AND OTHER LEAD MODIFICATIONS
    • LEAD CORRECTION
    • CROWNING
    • THE EFFECT OF LEAD CORRECTIONS ON TE IN SPUR GEARS
• CONTACT IN HELICAL GEARS
• TRANSMISSION ERROR IN HELICAL GEARS
• INVOLUTE AND LEAD CORRECTION IN HELICAL GEARS
• REFERENCES

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Index to Paper

Index to Paper

• CONTROLLED SHOT PEENING OF GEARS AND TRANSMISSION COMPONENTS CONTROLLED SHOT PEENING THEORY
  • INTRODUCTION
    • Residual Compressive Stress Surface Roughness Surface Hardness Grain Size Microstructure.
    • Ultimate Tensile Strength.
  CONTROLS OF SHOT PEENING
  • INTRODUCTION
    • Media control. Intensity Control. Coverage Control
    • Equipment Controls.
  APPLICATIONS OF CONTROLLED SHOT PEENING
  • INTRODUCTION
    • Surface Treatments Welding Electro-discharge machining (EDM) or "Spark Erosion"
    • Grinding
  EXAMPLES OF COMPONENTS WHICH HAVE BENEFITED FROM SHOT PEENING.
  • BLADES CONNECTING RODS. CRANKSHAFTS
  • SHAFTS AND AXLES
• TRANSMISSIONS AND CONTROLLED SHOT PEENING
  • BENDING AND TORSIONAL FATIGUE PITTING OR CONTACT FATIGUE. CARBURISED AND NITRIDED STEELS. DECARBURISATION. GRINDING ABUSE. SHOT HARDNESS. RETAINED AUSTENITE.
  • CORRECTION OF DISTORTION BY SHOT PEENING

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