Dissertation > Excellent graduate degree dissertation topics show

Optimization Design of the Tooth Profile of Pre-grinding Gear Hobs

Author: ZhangJing
Tutor: KongXiangWei
School: Northeastern University
Course: Mechanical Design and Theory
Keywords: Hob cutter Pre-grinding Undercut Fillet Simulation
CLC: TG721
Type: Master's thesis
Year: 2009
Downloads: 88
Quote: 0
Read: Download Dissertation

Abstract


The undercutting phenomenon exists on the root of the gear manufactured by pre-grinding hob. Therefore pre-grinding hobs are usually used for the rough working of high precision hardened involute gears. It will be bad for the performance of the gear after grinding, once the undercut is too bog or too small. So the control of undercut is needed. But the pre-grinding gears produced by pre-grinding hobs which is designed by usual method probably cannot have the adequate undercut. Thus, the pre-grinding hob profile should be optimized.A complete geometry of the gear tooth was mathematically derived in terms of the design parameters of the pre-grinding hob cutter, including involute, secondary involute and fillet. The degree of undercutting and the radii of curvatures of a fillet were investigated by considering the model. The pre-grinding can be optimized by applying with the model. The function of optimization design and optimization process for double circular arc pre-grinding gears are introduced. The requirements for the variable parameters are discussed. The influence of variable parameters on undercutting and the radii of curvatures of a fillet is also investigated with Matlab software. At last, a computer program for generating the profile of the gear teeth as developed by simulating the cutting methods. The undercutting phenomenon can be explicitly observed.The calculated model is similar to the generated gear tooth and the practical manufacturing result, which proves that the theory is correct.The methods proposed in this study were expected to be a valuable guidance for pre-shaving hob designers and manufacturers.

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Study of Interaction between Epoxy Molecules and Carbon Fiber Surface with Molecular Simulation,TB332
  3. Research on Mechanism Analysis and Modeling Simulation of Horizontal Well Tractor,P631.83
  4. Study on Springback of High-Strength Steel Stamping,TG386
  5. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  6. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  7. The Brake Performance of Hydraulic Retarder and Simualtion Research on Its Application for Aircraft Arrestment,TH137.331
  8. Satellite Attitude Determination Based on Gyro and Star Sensor,V448.2
  9. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  10. Research on Orbital Control Method for Space Rendezvous and Docking,V526
  11. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  12. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  13. Single Neuron PID Control for Electro-Hydraulic Servo Unit of Ship Rudder,U666.152
  14. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  15. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  16. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  17. Numerical Simulation of Biomass Direct Reburning,TK16
  18. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  19. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  20. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  21. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23

CLC: > Industrial Technology > Metallurgy and Metal Craft > Cutting tools, abrasives,abrasive tools,fixtures,molds and hand tools > Tool > Gear cutting tools
© 2012 www.DissertationTopic.Net  Mobile