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중고 수직형 머시닝센터의 재제조 공정 표준화 기술 개발에 관한 연구

A Study on the Development of Standardization Technology for Remanufacturing Process of Used Vertical Machining Center

Journal of the Korean Society for Precision Engineering 2017;34(8):517-524.
Published online: August 1, 2017

1 창원대학교 기계공학부

2 창원대학교 클러스터사업단

1 School of Mechanical Engineering, Changwon National University

2 R&D Cluster Agency, Changwon National University

#E-mail: cmlee@changwon.ac.kr, TEL: +82-55-213-3622, FAX: +82-55-267-1160
• Received: May 12, 2017   • Revised: May 26, 2017   • Accepted: June 11, 2017

Copyright © The Korean Society for Precision Engineering

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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  • Remanufacturing Technology Development of Industrial Hydraulic Cylinder
    Kyu-Chang Lee, Woo-Hyun Son, Sang-Jin Park, Hak-Soo Mok
    Journal of the Korean Society of Manufacturing Technology Engineers.2018; 27(6): 539.     CrossRef

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A Study on the Development of Standardization Technology for Remanufacturing Process of Used Vertical Machining Center
J. Korean Soc. Precis. Eng.. 2017;34(8):517-524.   Published online August 1, 2017
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A Study on the Development of Standardization Technology for Remanufacturing Process of Used Vertical Machining Center
J. Korean Soc. Precis. Eng.. 2017;34(8):517-524.   Published online August 1, 2017
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A Study on the Development of Standardization Technology for Remanufacturing Process of Used Vertical Machining Center
Image Image Image Image Image Image Image Image Image Image Image Image
Fig. 1 Diagram of resource circulation
Fig. 2 The structure of vertical machining center
Fig. 3 Work operation sheet for disassembly of main body structure
Fig. 4 Work operation sheet of ATC
Fig. 5 Remanufacturing process chart of performance evaluation
Fig. 6 Flow chart of the developed program
Fig. 7 Windows by remanufacturing process of program
Fig. 8 Window of check list
Fig. 9 Measurement environment of position precision and repeatability
Fig. 10 Measurement environment of spindle run-out
Fig. 11 Measurement environment of noise level
Fig. 12 Standard of performance evaluation
A Study on the Development of Standardization Technology for Remanufacturing Process of Used Vertical Machining Center

Remanufacturing process of main body structure

Process Process picture Process summary
Equipment
in stock
- Check the appearance of equipment
- Check operation of driving part
- Performance evaluation
Disassembly - Disassembly of peripheral and covers
- Disassembly of bed, column, table, saddle
- Disassembly of unit
Cleaning - Bed, column, table, saddle cleaning
- Removal of paint
Working of
slide faces
- Removal of turcite
- Slide faces machining
- Reattachment of turcite
- Oil groove machining
- Slide faces grinding machining
Painting - Painting of bed, column, table, saddle
- Slide faces scraping
Assembly - Installation of pipe
- Adjustment of gib
- Assembly of bed, column, table, saddle
- Assembly of unit
Performance
evaluation
- Machining precision evaluation
- Check the noise
- Check the spindle run-out

Remanufacturing process of unit and utility system

Unit Process picture Process summary
Spindle - Disassembly of spindle
- Spindle cleaning
- Check the bearing
- Replacement of bearing
- Spindle grinding machining
- Assembly of spindle
- Check the spindle vibration, noise and balance
ATC - Disassembly of ATC
- Check the magazine and replacement of tool pot
- Dram, bracket, cam box cleaning and grinding
- Painting of bracket, cam box
- Installation of pipe, power
- Assembly of ATC and performance evaluation
Ball-
Screw
- Check performance using indicator
- Measurement of ball-screw vibration
- Replacement of ball-screw in case of necessity
NC - Disassembly of cable, connector and power box
- Replacement of NC system
- Check the operation

National development situation of remanufacturing process

Process Process
technology
Commercial
technology
Systems
technology
Classification 4 4 4
Disassembly 1 2 2
Cleaning 4 3 1
Inspection 4 2 1
Adjustment 3 4 4
Reassembly 3 3 1
*1- Excellent, 2- Good, 3- Normal, 4- Bad

Measuring equipment of performance evaluation

Equipment Manufacturer Model name
Laser range finder RENISHAW XL-80
Indicator Mitutoyo 513-405
Phone meter SVAN SVAN971

Measurement result of position precision and repeatability

Position precision
Classification Position Forward Reverse Both
Before
remanufacturing
X axis 39 53 93
Y axis 76 97 103
After
remanufacturing
X axis 11.6 5.6 11.9
Y axis 11.6 6 11.8
Repeatability
Classification Position Forward Reverse Both
Before
remanufacturing
X axis 17 8 92
Y axis 31 53 53
After
remanufacturing
X axis 9.9 3.9 10.3
Y axis 6.2 3.2 6.7

Measurement result of spindle run-out

Classification Number of measurement
1st 2nd 3rd 4th 5th
Before
remanufacturing
42 40 42 40 42
After
remanufacturing
20 22 20 20 20

Measurement result of noise

Classification Forward Left Right
Before
remanufacturing
81.3 84.5 83.7
After
remanufacturing
75.8 77.5 73.2
Table 1 Remanufacturing process of main body structure
Table 2 Remanufacturing process of unit and utility system
Table 3 National development situation of remanufacturing process
Table 4 Measuring equipment of performance evaluation
Table 5 Measurement result of position precision and repeatability
Table 6 Measurement result of spindle run-out
Table 7 Measurement result of noise