Dissertation > Excellent graduate degree dissertation topics show

Research of a High Frequency Hydraulic Vibration Application on Cold Extrusion

Author: FengXiaoLong
Tutor: XingTong
School: Zhejiang University of Technology
Course: Mechanical and Electronic Engineering
Keywords: electro-hydraulic vibration exciter cold extruding extrusion force flutter generator
CLC: TG376.3
Type: Master's thesis
Year: 2013
Downloads: 19
Quote: 0
Read: Download Dissertation

Abstract


Along with to go deep and continuously of the research of vibration aided processing,the relevant conclusion shows that by combining the technique of vibration and metal plastic processing during the fabrication, can reduce the surface friction between the blank and die, and can reduce the extrusion pressure. In the past research, are given priority to adopt the mechanical vibration or ultrasonic vibration, they are difficult to achieve a larger vibrate force output and difficult to realize stepless adjustment of frequency and amplitude. However electro-hydraulic vibration instruments have large vibrate force output,and can realize the stepless adjustment of the frequency and amplitude. So will combining the electro-hydraulic vibration exciter and cold extrusion processing technology, under the condition of without increase equipment tonnage, also can extrude difficult forming parts smoothly under normal temperature is more, and it has important theoretical significance and practical value.This paper combining the electro-hydraulic vibration exciter and cold extrusion mould, by the adjustment of frequency and amplitude to find the optimal combination. First of all through the Deform simulation of the system working process and by the method of engineering to calculate force of the working processing and established the mathematical model of the system. Through the experimental to verification. The main work and achievements of this paper are as follows:(1) This paper had expounded the design and characteristic of the vibration cold extrusion system structure, mould design and mechanics check, and made the detailed introduction and analysis of the whole system structure and principle of the experiment.(2) Through the way of engineering analysis to infer mathematical formula of extruded material, and get the extrude pressure. The result can make the contrast with the result of simulation the contrast, and provide reference for the experiment data. And through Deform to simulate two kinds of cold extrusion process,which are with vibration and without vibration,and make the contrast, And on this basis, building on an orthogonal table about the amplitude and frequency, and simulate the data in the table. And finding the optimal frequency and amplitude combination.(3) By establishing the mathematical model of cold extrusion mould with vibration, and to get the system transfer function. On this basis,making the further theory simulation analysis and the experiment analysis of the system for below.(4) Simulating the displacement and stress of the system key parts during the extrusion processing. And through the simulation of MATLAB software to analysis waveform frequency spectrum of the elastic plate under load.(5) Experimental research. Set up the experiment platform, acquisition of experimental data, and analysis the experimental data. Making the comparison between the experimental data and the simulation date, and analyzed the cause of the difference.

Related Dissertations

  1. The Excited Waveform Analysis of the Electrohydraulic Vibrator Based on 2D Valve,TH137.5
  2. Research and Realization of the Key Technology in the Hot Extrusion of Pipe Material Shaping,TG376
  3. The Research of the Excitation Control System for the High-Frequency Fatigue Test Machine,TH87
  4. Crack Failure Research of Crane Based on Finite Element Method and Fracture Mechanics,TH21
  5. The Study of Backward Extrusion Process for Ti-Ni Alloy Tube,TG376
  6. Research on Extrusion Process of Ultra-thin Aluminum Alloy Empennage,TG379
  7. The melt extrusion RP precision analysis and processing,TG376
  8. ECAP contact wire with Cu-Cr-Zr alloys,TG376
  9. Large-diameter thin-walled tube thinning spin forming process research and wall thickness error prediction,TG376
  10. Research on Ball-Spinning Forming for Large Size and Thin-Walled Tube,TG376
  11. Numerical Simulation and Forming Process Optimization on Unsteady Bending of Large-diameter Equal Wall-Thickness Elbow,TG376.9
  12. Analysis and Research on the Spin Forming Process of Tubeless Steel Wheel,TG376
  13. Numerical Simulation and Process Research for Titanium Alloy Tubes,TG376
  14. Research on Technology and Equipment of the Cold Extrusion for Spline,TG376
  15. Research on Ball-Spinning Forming Craft of Thin-Walled Tube,TG376
  16. Hypereutectic high chromium cast iron pieces of quality and its impact extrusion abrasive wear performance analysis,TG376
  17. Large plastic deformation of composite extrusion finite element simulation study,TG376
  18. Preparation of TWIP Steel Research ECAP,TG376
  19. The Numerical Simulation Research on Tube Extrusion Forming Technology of Glass/Aluminium Metal Matrix Composites,TG376
  20. The Research on Surface-strengthening Technology Via Warm Surface-rolling,TG376
  21. Numerical Simulation of Equal Channel Angular Extrution of Fine-Grained GCr15 Alloy Material and Tribological Properties Research,TG376.1

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Extrusion > Extrusion process > Cold extrusion
© 2012 www.DissertationTopic.Net  Mobile