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TECHNICAL BRIEFS

Attractive Fixture System Based on Magnetic Field and Friction Force for Numerically Controlled Machining of Paper Honeycomb Core

[+] Author and Article Information
Yinglin Ke

Mechanical and Energy Engineering College,  Zhejiang University, Hanzhou 310027, People’s Republic of China and The State Key Lab of Fluid Power Transmission and Control,  Zhejiang University, Hangzhou 310027, People’s Republic of China

Gang Liu

Mechanical and Energy Engineering College,  Zhejiang University, Hanzhou 310027, People’s Republic of Chinaliugang1218@sina.com

1

Corresponding author.

J. Manuf. Sci. Eng 127(4), 901-906 (Mar 25, 2005) (6 pages) doi:10.1115/1.2039944 History: Received March 12, 2004; Revised March 25, 2005

In order to improve the precision of machining and reduce the processing cost of paper honeycomb core, a new method is presented to fix the honeycomb core work piece to the working platform using magnetic and frictional forces. In this method, iron powder is used as a medium instead of the traditional adhesive-based material to achieve the bonding between the work piece and the working platform. Iron powder is poured into honeycomb cells until it reaches the desired height using a numerically controlled iron powder feeder system. In addition, a magnetic working platform is manufactured and placed on top of the station of the milling machine. The magnetic field produced by the magnetic working platform is leaded to the iron powder while the magnetic field control system switches on. More precisely, the mutual magnetic attraction between the iron powders located in different cells of the honeycomb and between the iron powder and the platform is generated. While cutting force is applied to the work piece, two types of friction force occur. One is between the iron powder and the wall of the honeycomb cells, and other one is between the work piece and the working platform. Once the resultant friction force balances the machining load, the work piece will be then fixed to the platform. In this paper, a new bonding system based on the new method is introduced and demonstrated.

Copyright © 2005 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Polyethylene glycol method

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Adhesive tape method

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Principle and structure

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Figure 5

Distribution of magnetic poles

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Test result for honeycomb core

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Test result for table board

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Figure 8

Relationship of friction force and iron powder height

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Fixture equipment

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Control principle

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Figure 11

Fixture equipment

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Figure 12

Machining results

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Figure 13

Structure of the feeder system

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Structure of vibration feeder

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Structure of switch

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Figure 16

Relationship between iron powder height and move speed of feeder

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