Dissertation > Excellent graduate degree dissertation topics show

The Research and Optimal Design of the High-speed and High-precision Movement Mechanism for SMT Equipments

Author: JiangTao
Tutor: TangHuoHong
School: Hefei University of Technology
Course: Mechanical Engineering
Keywords: SMT equipments High-speed and high-precision motion mechanism Gantry structure Dynamic simulation Structural optimization
CLC: TH112
Type: Master's thesis
Year: 2013
Downloads: 9
Quote: 0
Read: Download Dissertation

Abstract


High-speed and high-precision Placement Machine is the most critical equipment in the SMT equipments, whose speed and accuracy are the most important performance indicators and the motion mechanism with high speed, high precision and high stability is the key to reflect its performance. With the goal of designing a high-speed and high-precision motion mechanism for SMT equipment, some common movement mechanisms in existing Chip Mounter were researched. A new X-Y type movement mechanism with gantry structure was designed after comprehensive analysis of the advantages and disadvantages of the various mechanisms and the initial model of this new type movement mechanism was established. The beam and base of the mechanism were designed in detail, in which the materials, manufacturing methods and structure of parts and structural lightweight were involved.In order to ensure the mechanical strength and stiffness, the mechanical behaviors of the base and beam under the static and dynamic load were researched in ANSYS separately by the static checking and transient kinetic analysis. The dynamic characteristics of the sub-structure of the movement mechanism and overall were studied by modal analysis technology, the analysis of the structure of the natural frequencies and mode shapes showed that the dynamic characteristics of the sub-structure has a very important influence on the overall dynamic performance. What’s more, the weakness or redundancy of the structure has been optimized and the overall dynamic performance was enhanced.A multi-rigid-body model and a rigid-flexible coupling multi-body model of the motion mechanism were established by ADAMS based on combination of rigid and flexible multi-body dynamics theory and finite element method, dynamic simulations were respectively conducted in their full motion cycle to analyze and study the elastic vibration and dynamic accuracy of the actuator (i.e. Placement Head).The accuracy of the modeling of rigid-flexible coupling was verified by the comparison of two kinds of simulation results. According to the results, the structure of the beam has been optimized, which has the greatest impact on the vibration of mechanism, and the vibration significantly weakened as well as the dynamic accuracy has been improved that meets the requirements of the use of high speed and high precision SMT machine.

Related Dissertations

  1. The Study of Dynamic Simulation of the Passive Dynamic Quasi-Quarupedal Walker,TP242.6
  2. Finite Element Analysis and Optimization Design of a Tractor Cab,S219.02
  3. Study of the Belt Conveyor Dynamic Simulation Based on AMESim,TD528.1
  4. Gatling machine gun in a modeling and simulation analysis,TJ24
  5. TVM subway ticket design and analysis of the transmission device,U293.22
  6. Nonlinear Structural Dynamics Analysis and Optimization Design on Naval Gun Driver,TJ391
  7. Prediction and Simulation of Air Quality of Coal Mining Area Based on VGIS System,X831
  8. Motorcycle Damping System and Riding Comfort Research,U483
  9. Dynamic Characteristic Simulation and Study of Sliding Coal Plow,TD421.62
  10. The Structural Optimization and Marketing Strategy of Qilu Bank Online Banking Product,F832.2
  11. Dynamic Simulation Research on Coal Project Economic Evaluation System Based on System Dynamics,F426.21
  12. Structure Optimization of Cyclone Separator with Radial-Inlet in Preliminary Syngas Purification Process,TQ051.8
  13. Performance Study and Structural Optimization on Heat Exchanger with Helical Baffles,TK172
  14. Study on Structural Optimization in Composite Culture Sytem of Ctenopharyngodon Idellus with Hypophthalimicthys Molitrix and Litopenaeus Vannamei,S966.12
  15. ZL16H Loader Virtual Prototype Modeling and Dynamic Simulation and Mechanics Research on Working Device,TH243
  16. Structural Performance Analysis and Optimization of Machine Tool Bed,TG659
  17. Study on the Structure of a New Type High Precision Adjusting Platform with Two-dimension,TH703
  18. Centrifugal dewatering based OGRE 3D Simulation System Design and Implementation,TP391.9
  19. SWATH catamaran Fatigue Analysis and Optimization of a typical node,U674.951
  20. Research on Policies and Inner-structure Adjustment of WuXI Environmental Protection Industry,X324
  21. Study on Coal Mining Subsidence Mechanism and Surface Displacement Deformation Prediction,TD325

CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanics (mechanical design of the basic theory ) > Of mechanism
© 2012 www.DissertationTopic.Net  Mobile