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Study and Design on Magnetic Powders Clamping System

Author: TangJianNing
Tutor: ZhouYanFei
School: Nanjing University of Aeronautics and Astronautics
Course: Mechanical and Electronic Engineering
Keywords: Magnetic particle clamping Magnetic field Friction Finite Element Analysis Clamping force Overall structural member
CLC: TG75
Type: Master's thesis
Year: 2010
Downloads: 24
Quote: 0
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Abstract


The overall structure of the piece because of its light weight , small amount of work assembling , high reliability, a significant advantage , is widely used in the aerospace and related fields . Most of these structural parts of large size , complex structure , clamping inconvenient process occurs most often caused by the deformation of the workpiece clamping unreasonable . In this paper, design A magnetic powder to hold the workpiece clamping scheme . The program's basic principle is to use an external magnetic field to to produce magnetization of the magnetic particle , to making magnetic particle positive pressure on the the workpiece wall and bench . When the trend of relative movement of the workpiece during the cutting process , is generated between the wall and the magnetic particle of the magnetic powder and the workpiece and worktable friction, so as to achieve the purpose of clamping the workpiece . In this paper, the electromagnetic field theory and statics as a theoretical basis , the basic principles of magnetic particle clamping , the clamping force mechanism , theoretical analysis , measured by the coefficient of friction of experimental use 80 mesh reduced iron powder as a filling magnetic particle ; using the finite element method simulation of the magnetic field in the filled area of the magnetic powder , the qualitative analysis of the structural parameters of the electromagnetic device , populate the parameters of the magnetic powder of the magnetic field distribution , the analysis showed that the strength of the magnetic induction with the height of the rise in the magnetic particle attenuation pole length , filling width little effect on the magnetic field distribution ; and unit electromagnetic device test test test results validate the finite element modeling , the accuracy and reasonableness of the calculation . Determined through experiments and regression analysis methods to create a holding force with the excitation current , the magnetic powder to fill the functional relationship between the height of the three . Finally, the self - made ??electromagnetic device to actual milling test to verify the feasibility of the magnetic particle clamping techniques .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Cutting tools, abrasives,abrasive tools,fixtures,molds and hand tools > Fixture
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