Dissertation > Excellent graduate degree dissertation topics show

Study on the Mechanism of Mild-Soft Sheet Metal Forming and the Method of Avoiding Crack

Author: ChenTongHai
Tutor: YangGuang
School: Wuhan University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Stamping Mechanism Stress-strain Avoid cracking PLC
CLC: TG386
Type: Master's thesis
Year: 2006
Downloads: 191
Quote: 0
Read: Download Dissertation

Abstract


Stamping a process widely used method in the real production as a sheet metal pressure processing. However, often partial destruction of the metal blank in the stamping process. Once the destruction of the blank stamping it is impossible to continue, or produce waste, which would seriously affect the production schedule and cost. Therefore, sheet metal stamping mechanism and avoid cracking method has some theoretical significance and practical value. Research of the paper from the plastic forming technology of metallic materials at home and abroad to start, for domestic sheet metal stamping forming the cracking processing, analysis, comparison on the basis of the research method of stamping identified through qualitative analysis of stamping forming in seeking to avoid cracking processing research ideas. First, through the analysis of three typical of metal crystal lattice structure and its deformation under external force to clarify the impact factors of the physical substance of elastic-plastic deformation of metal under external force, deformation and plastic deformation of metal macro The analysis of the plastic forming the foundation. Second metal specimen tensile curve analysis, the system elaborated Metal Forming stress - strain law reveals metal plastic deformation constitutive relations and the process of forming material strain hardening properties of Forming provides a theoretical basis for the study sheet metal stamping regularity and qualitative analysis processing cracking. Third, the for stamping process characteristics, the sheet metal blank geometric shape characteristics and the special nature of the mold, stamping in deformation zone the vast majority of cases are the characteristics of the plane stress state, summed up the law and failure analysis of stamping tropism method. On this basis, through a specific process of a sheet metal stamping process analysis, processing Cracking clarify the forming process and accordingly take the appropriate measures to avoid cracking. Finally, test results are verified, and to avoid cracking the method applied to real production. The hydraulic mechanism to automatically control the processing of the programmable controller by a company fuel tank bracket stamping process, to achieve the adjustment of the speed of stamping, thereby reducing the forming speed. Be able to better use of the strain hardening and plastic deformation of the metal forming reasonable match, and effectively avoid the cracking of the fuel tank bracket forming process.

Related Dissertations

  1. Study on Hermetic EDGE Sealing of Anodic Bonding for Vacuum Glazing,TQ171.1
  2. Reactive Hot-Pressing and Mechanical Properties of （ZrB2-ZrO2）/BN Composites,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. The Effect of Composite Additive on the SNCR,X701
  6. Kunming Transient Population Community Present Situation, Question and Countermeasure Preliminary Study,C924.25
  7. The Development of Electric Control System for Product Line of Cross-Linked Cable,TP273.5
  8. The Research on a New Modular Self-Reconfigurable Robot,TP242.2
  9. Study on Wastewater Purification Effect of the Free Surface Wetland with Different Substrates and Plant Combination,X703
  10. Research on Key Technologies of Automatic Steel Wire Galvanizing Production Line Based on Gas Reduction Method,TQ153.15
  11. The Research of the Dynamic Process of Advertising Public Opinion,G206
  12. Research of Multicast Protocol in Wireless Sensor Networks,TN929.5
  13. Study on Application of Non-phosphate Additive in Frozen Penaeus Vannamei and Mechanism of Water-holding,TS254.4
  14. Incentive Mechanism Research of the New Generation of Migrant Workers,F272.92
  15. Shandong Province,university research projects Integrated Management Model,G644
  16. Process and Mechanism of Eucalyptus Pulp Bleaching Catalysed by Cu2+/Co2+,TS745
  17. The Environmental-Friendly Method and Process of Removing Non-Cellulosic Matters from Bamboo for Textile Fiber,TS652
  18. Minority environmental rights,D922.68
  19. Research and Implementation on Service-Oriented Multi-Agent System Cooperation Mechanism,TP393.09
  20. Studies on the Models of the Reform of Chinese Marine Management System,D630
  21. Gel - Foam Preparation of porous alumina insulation materials,TQ174.1

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Cold stamping ( sheet metal processing) > Cold stamping process
© 2012 www.DissertationTopic.Net  Mobile