Dissertation > Excellent graduate degree dissertation topics show

CNC machine tool coordinate measuring - Reverse Modeling Research

Author: ZhaoWeiWei
Tutor: WangBiao
School: University of North
Course: Mechanical Manufacturing and Automation
Keywords: machining center curved surfaces measure sketch-based feature constraint optimization
CLC: TG659
Type: Master's thesis
Year: 2007
Downloads: 117
Quote: 0
Read: Download Dissertation

Abstract


How to deal with the datam from the machine center is discussed in the topic. The research on constraints based structural feature model reconstruction method is a new aspect in reversing engineering, which can be used to reconstruct more reliable model. Modeling in current 3D CAD softwares such as CATIA、Pro/Engineer are mainly based on sketch design. According to the idea of modeling and on the basis of segmenting 3D measured date with feature design intention, this thesis studies the reconstruction methods of model sketch-based feature such as extruded and rotational features in structural part models. The main contents of this thesis are as follows:(1)The technique of sketch Profile fitting is studied in this thesis. First the sketch/datam Plane is fitted by Least-Square distance,then the extruded direction or axis with the flank points of the cloud is extracted in quadratic paogramming arithmetic, and certain Points projected to gain 2D sketched datam. Feature Points are defined to segment the sketch datam,and the sketch Profile is generated by fitting separately the line and circle segment.(2) The 2D geometry constraints between or among the features are classified. the expression of ZD constrains and the resolvent about constrains are discussed the algorithms and process of resolving constrains are demonstrated.(3) The generation methods of sketch-based feature model reconstruction are presented in this thesis. Experimental results show that the methods presented here are reliable.(4) It analyses and introduces the geometry data point optimized measure plan and the precision question, in the curved surfaces measure, it provides the method of carries on the data point according to the characteristic point of the gathering.Preliminarily study the measuring methods and path plan of some simple even curve plane in three-dimensional space. Experimental results show that the methods presented here are reliable.

Related Dissertations

  1. Research on Stability of Hierarchical Sattellite Network,TN927.23
  2. Cloud computing environment, software dynamic deployment,TP311.52
  3. Static and dynamic characteristics of gantry machining center structure based on finite element technology,TG659
  4. High Speed Machining Center Milling Machining Parameter Optimization of Internal Combustion Engine Cylinder Block,TG547
  5. Structural Dynamic Characteristic Analysis and Optimization of A 5-Axis Linkage NC Machining Center,TG659
  6. VMC40 processing center and structure design of feed system performance research,TG659
  7. Research on Curriculum Scheduling System Based on Genetic Algorithm,O224
  8. Finite Element Analysis and Optimum Design on Ansys in XH2408 Gantry Style NC Machining Center,TG659
  9. Research on Individual Credit Service Risk Control of Commercial Banks in China,F832.4
  10. Applied Study on High-speed Spindle,TG659
  11. Processing center based on graph theory exercise program innovative design and evaluation research,TG659
  12. Machining center line motion error detection method,TG659
  13. Quantitative Modeling & Application Study of Failure Rate Bathtub Curve of Machine Tool,TG502.7
  14. The Analysis of Dynamical Charaeteristics of Precision Horizontal Machining Center,TG659
  15. CNC Machine Thermal Error Compensation Technology,TG659
  16. Dynamic Characteristics Research of Active Pole Horizontal Machine Center,TG659
  17. Study on Spindle Servo Control of Four-axis Vertical Machining Center,TG659
  18. Research on the Application of New Technology to Machine Tool’s Appearance Design,TG659
  19. Research on the Static and Dynamic and Thermal Property of CNC Machine Tools Based on Machine Joints,TG659
  20. Technology Researching on Box Parts of Heavy-duty Vehicle Transmissions and Fiexible Manufacturing Line Programming,U463.212
  21. Based on the Agent of Mobile Users More Resource Conflict Coordination Technology Research,TP18

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Program control machine tools, CNC machine tools and machining
© 2012 www.DissertationTopic.Net  Mobile