Dissertation > Excellent graduate degree dissertation topics show

Research on Forming Theory and Machining Technology of Extruding Screw

Author: LiJingMin
Tutor: OuChangJin
School: Zhejiang University of Technology
Course: Mechanical and Electronic Engineering
Keywords: extruding screw helical surface mathematical model machining technology
CLC: TQ320.6
Type: Master's thesis
Year: 2010
Downloads: 64
Quote: 0
Read: Download Dissertation

Abstract


Extruding machines are used widely in the rubber and plastics industry because of its special character. With rapid development of the extruding theory and extruding process, and with the deep understanding of extruding material, it occurs kinds of special shape extruding screws. At present, the machining process of the extrusion screws in domestic is behind,the main process of manufacturing extruding screw is by using gernerl lathe and milling machine with forming cutter-tools and by using simple numerical control machine. It is difficult to meet the needs of manufacturing high precision and complex modelling screws. Meanwhile, the method of design stays on by general CAD, it does not adapt to the needs of enterprise development . So, it has vital significance to enchance screws design capability、processing level and productivity by means of researching extruding screws design method、manufacture technology and machining process. The works and results of research in this paper is incarnated as follows:1、Setting up mathematical model of variable lead and conical surface alien extrusion screw Starting from forming theory of helical surface, it provides the basis of the design and machining process of alien extrusion screw.2、Putting forward the parametric design method of alien extrusion screw by using the parametric principle ; Realizing extrusion screw parametric modeling by using Solidworks and achieving the goal of rapid design of alien extrusion screw.3、By means of helical surface shaping theory and single parameter envelope theory , this paper analyses kinds of processing methods of helical surface by using forming cutter-tools. Meanwhile, milling tools shape is calculated by means of Matlab, and the key machining processes of parallel twin-screw are analysed, and its process planning is made.4、Thinking over existing shortcomings of present screw machining process, One new cylindrical screw surface machining process is proposed and its machining mathematical model is set up with milling cutter. This pape analyses machining error and intervene phenomenon of this new process . By compared with traditional processes, this new process has machining efficiency advantage. 5、Analysing CNC processing methods of alien extrusion screw by means of envelope shaping theory and CNC machining principle.

Related Dissertations

  1. Design and Simulate Analysis of Active Subsoiler by the Planetary,S222
  2. Exploration and Simulation on Semi-solid Billet by Induction Heating in Temperature Field,TG249.9
  3. Research on the New Type Brushless Wound-Rotor Asynchronous Motor,TM343
  4. Simulation analysis of permanent magnet synchronous motor power factor,TM341
  5. Design of Grid-Connected Solar Photovoltaic System and Research on Effect of PV on Power Grid,TM615
  6. Study on Switched Reluctance Motor Drives without Rotor Position Sensor,TM352
  7. Numerical Simulation on Three Dimensional Heat Transfer and Flow of Supercritical Hydrocarbon Fuel,TK124
  8. Cutting Parameters Optimization Based on Improved Genetic Algorithm,TP18
  9. Research of Corrosion Dynamics of Mild Steel under Thin Electrolyte Layer Based on Random Corrosion Units Model,TG171
  10. Modeling and Controlling Researches on Strip Steel Hot-Dip Galvanizing Annealing Furnace,TG155.1
  11. Shaped Catalyst in Hydrocarbon Steam Reforming Process and Application of Dynamics,TQ032
  12. Construction of the Drilling Fluid Continuous Pressure Wave QPSK Signals and Its Transmission Characteristics Study in the Directional Wellbore,TE254.1
  13. The Simulation on Kinematics and Dynamics of Key Institutions on Micro-corrugated Board Produced,TB486
  14. Numerical Simulation Study on Hydraulic Characteristics in Long Distance Water Diversion Tunnels,TV135
  15. Present Situation and Prediction of Seawater Intrusion in Coastal Region of Tangshan,X143
  16. Research on Development of Water-Saving Agriculture System of the Minqin Oasis,S274
  17. Experimental Study and Analysis on Head-feed Threshing and Separating Device,S225.3
  18. Research on Predictions of Arable Land Quantity in County-Level Land-use Planning,F224
  19. Research on Liquid Dehumidifition Technology Apply in Waste Heat from Dry System,TU834
  20. Quantitative Calculation of DCS Reliability Index,TP273.5

CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > General issues > Production process and production technology
© 2012 www.DissertationTopic.Net  Mobile