The Investigations of Friction under Die Surface Vibration in Cold Forging Process

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The Investigations of Friction under Die Surface Vibration in Cold Forging Process

Authors
Publisher
Technical University of Denmark
Keywords
  • However
  • Furthermore
  • Finally
  • The Objective Of This Thesis Is To Fundamentally Study The Influence Of Die Surface Vibration On Fri
  • The Research Includes Vibrating Tool System Design For Metal Forming
  • Theoretical And Experimental Investigations
  • And Finite Element Simulations On Die Surface Vibration In Forging Process
  • After A General Introduction To Friction Mechanisms And Friction Test Techniques In Metal Forming
  • The Application Of Ultrasonic Vibration In Metal Forming
  • The Influence Of Sliding Velocity On Friction Is Described
  • Some Earlier Investigations Of The Application Of Ultrasonic Vibration On Drawing
  • Rolling And Other Metal Forming Process Show That The Load And Friction Coefficient Would Be Decreas
  • Investigations On Forging Processes And Under Low Frequency
  • Especially The Quantitative Analysis Of Friction Reduction Are
  • Quite Limited
  • The Thesis Describes The Two Types Of Vibrating Tool System For Implementing The Die Surface Vibrati
  • The Tool Developing Can Be Divided Into Two Stages: The First Stage Is To Design And Manufacture A P
  • And The Second Stage Is To Design And Manufacture A More Practical Tool System Which Can Be Used To
  • The High Performance And Power Piezoelectric Actuator Stack As The Vibration Source Will Be Used For
  • The Prototype Experiments Were Conducted With Cylinder Upsetting And Ring Compression Test
  • Further Investigations Focus On Rectangular Specimen Compression Test In Order To Investigate The Me
  • In The Experiments
  • Die Surface Orientation
  • Frequency And Amplitude Of Vibration
  • Vibrating Wave Form And The Direction Of Vibration Has Been Taken Into Account As The Parameters Whi
  • The Results Reveal That Friction Could Be Reduced Up To 50% With Vibration Being Applied In Forming
  • By Using Finite Element Method
  • A Series Of The Simulations Of The Cold Forging Process Under Die Surface Excitation Have Been Imple
  • Especially The Influence On Metal Flow
  • Stress And Strain Distribution
  • The Results From Fem Simulation Show That Die Surface Vibration Have Significant Influence On The Me
  • Strain And Stress Distributions In A Deformed Work Piece
  • A Number Of Validation Tests With Or Similar To Industrial Components Are Presented To Verify The Po

Abstract

The Investigations of Friction under Die Surface Vibration in Cold Forging Process - DTU Orbit (17/04/14) The Investigations of Friction under Die Surface Vibration in Cold Forging Process - DTU Orbit (17/04/14) The Investigations of Friction under Die Surface Vibration in Cold Forging Process Jinming, S. 2002 Technical University of Denmark. 150 p. Publication: Research › Ph.D. thesis – Annual report year: 2002

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