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Research Papers

Microthreading in Whirling

[+] Author and Article Information
Masaki Serizawa

Department of Mechanical Engineering,
Tokyo Denki University,
5 Senjyu Asahi-cho,
Adachi-ku, Tokyo 120-8551, Japan
e-mail: 12ky044@ms.dendai.ac.jp

Motohiro Suzuki

Department of Mechanical Engineering,
Tokyo Denki University,
5 Senjyu Asahi-cho,
Adachi-ku, Tokyo 120-8551, Japan
e-mail: kettle-on-the-stove@ezweb.ne.jp

Takashi Matsumura

Mem. ASME
Department of Mechanical Engineering,
Tokyo Denki University,
5 Senjyu Asahi-cho,
Adachi-ku, Tokyo 120-8551, Japan
e-mail: tmatsumu@cck.dendai.ac.jp

1Corresponding author.

Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MICRO- AND NANO-MANUFACTURING. Manuscript received September 1, 2014; final manuscript received May 26, 2015; published online August 13, 2015. Assoc. Editor: Martin Jun.

J. Micro Nano-Manuf 3(4), 041001 (Aug 13, 2015) (7 pages) Paper No: JMNM-14-1064; doi: 10.1115/1.4030704 History: Received September 01, 2014

Whirling is applied to machining of microscrews on thin wires. A micro whirling machine has been developed for this. In order to suppress the vibration of the workpiece, the wire is inserted in polyurethane tubes clamped on a metal bar. Frequency analyses have been conducted by loading impulse forces at the center of the wire. The dynamic response is improved with reducing the vibration in the clamping force by the developed clamping system. Thirty micrometers microgrooves have been machined on 0.3 mm diameter stainless steel wires with fine surface finish, with the developed machine tool.

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References

Figures

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Fig. 2

Microwhirling machine tool

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Fig. 3

Tool mounted on whirling ring

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Fig. 4

Adjustment of edge alignment

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Fig. 5

Workpiece clamping system: (a) work area and (b) workpiece supporting device

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Fig. 6

Impulse response test

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Fig. 7

Vibration in clamping force: (a) wire without supporting device, (b) wire clamped on supporting device, and (c) wire clamped on supporting device with polyurethane tubes

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Fig. 8

Frequency analysis: (a) wire without supporting device, (b) wire clamped on supporting device, and (c) wire clamped on supporting device with polyurethane tubes

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Fig. 9

Whirling process: (a) actual cutting in whirling and (b) analytical model of whirling

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Fig. 10

Cutting area in whirling

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Fig. 11

Uncut chip thickness

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Fig. 12

Locus of tool motion with workpiece surface: (a) in a quarter of workpiece and (b) magnified

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Fig. 13

Machining examples: (a) example 1, (b) example 2, and (c) example 3

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Fig. 14

Surface profile: (a) profile and (b) three-dimensional image

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