Skip to main content
SpringerLink
Log in

Forming-die-free integrated stub-end manufacturing process using spinning

  • Published:
International Journal of Precision Engineering and Manufacturing Aims and scope Submit manuscript

Abstract

Stub ends are used to connect pipes in piping arrangements and are generally manufactured by welding two sub-components. This welding process is time consuming and causes pollution. Stub ends can also be produced without welding via a general spinning process using thicker pipe; however, the production cost is high, because different forming dies must be prepared in order to obtain various stub end sizes. Material loss also occurs. A flexible manufacturing process that does not use forming dies is proposed in this paper. The stub-end shape is formed by rolling dies instead of an outer mold. During this process, the lap roller motion is dependent on the required degree of forming. To determine the effects of the process parameters and to identify the optimal process, a commercial finite-element-method (FEM) code, DEFORM Ver. 11.0, is employed here. The lap-guide and lap-roller movement speeds are the main process parameters. Based on the simulation results, a 3-inch stub end meeting the ASME B16.9-2007 code requirements is fabricated. After production, the forming load is examined and the measured pressure on the ring roller is found to agree with the calculated value. The dimensions of each part of the stub end also satisfy requirements.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Abbreviations

G:

stub-end lap diameter

R:

stub-end fillet radius

T:

stub-end lap thickness

vLR :

movement speed of lab roller

t:

process time

References

  1. Kim, J. S., Cho, J. R., and Jeong, H. S., “Manufacturing Method of Long-Neck Flange,” KR Patent, No. 100688066, 2007.

    Google Scholar 

  2. Jeong, H. S., Son, C. W., Oh, J. S., Choi, S. K., and Cho, J. R., “Friction Welding Process Analysis of Piston Rod in Marine Diesel Engine and Mechanical Properties of Welded Joint,” Transactions of Materials Processing, Vol. 20, No. 3, pp. 236–242, 2011.

    Article  Google Scholar 

  3. Cho, G. R., Bae, W. B., and Choi, G. D., “Pipe Joint Forming Method by Local Rapid-Heating,” KR Patent, No. 100424335, 2003.

    Google Scholar 

  4. The American Society of Mechanical Engineers, “Factory-Made Wrought Buttwelding Fittings,” ASME B16.9-2007, 2007.

    Google Scholar 

  5. Kastuteru, A., Manufacturing Method of Lap-Joint Pipe, JP Patent, No. Shou64-71527, 1989 (in Japanese).

    Google Scholar 

  6. Park, H. W., Kwon, J. H., Kim, J. S., and Cho, J. R., “The Development of Manufacturing Method of Integrated Lap Joint by Spinning Process,” Proc. of Korean Society for Technology of Plasticity Spring Conference, pp. 163–166, 2010.

    Google Scholar 

  7. Faraji, G., Mashhadi, M., Dizadji, A., and Hamdi, M., “A Numerical and Experimental Study on Tubular Channel Angular Pressing (TCAP) Process,” Journal of Mechanical Science and Technology, Vol. 26, No. 11, pp. 3463–3468, 2012.

    Article  Google Scholar 

  8. Hong, L. P., “The Development of Manufacturing Method using Spinning Process of Integrated Stubend for Piping Connection,” M.Sc. Thesis, Department of Mechanical Engineering, Koran Maritime and Ocean University, 2013.

    Google Scholar 

  9. Gwak, G.-Y., Jeon, J.-W., Cho, J.-R., Choi, J.-Y., and Kim, J.-S., “Development of Integrated Stub End by Spinning Process,” Int. J. Precis. Eng. Manuf., Vol. 16, No. 7, pp. 1473–1477, 2015.

    Article  Google Scholar 

  10. Park, J. E., Han, C. S., Choi, S. W., Kim, S. S., and Na, K. H., “The Spinnability of Multi-step Cylindrical Cup in Spinning Process,” Proc. of KSPE Autumn Conference, pp. 1016–1020, 2001.

    Google Scholar 

  11. Kang, J. S., Park, G. S., and Kang, E. S., “Design of Hydraulic & Control System for the Disc Spinning Machine,” J. Korean Soc. Precis. Eng., Vol. 19, No. 9, pp. 157–165, 2002.

    Google Scholar 

  12. Lee, H. W., Hwang, D. W., Song, S. A., and Kim, C., “A Study on the Improvement of Hot Spinning Process for Weight Lighting of CNG Vessel (Type II),” Proc. of KSPE Spring Conference, pp. 135–136, 2012.

    Google Scholar 

  13. Jeong, D. S., Kim, S. T., Choi, D. B., Ye, S. B., and Seol, S. S., “A Study on the Thermal Characteristics of Spindle for the Spinning Machine,” Proc. of KSPE Spring Conference, pp. 565–569, 2005.

    Google Scholar 

  14. Kim, Y. H., Park, J. W., and Cho, H. S., “An Analysis of Tube Spinning for Shock Absorber on Vehicles,” J. Korean Soc. Precis. Eng., Vol. 17, No. 3, pp. 33–38, 2000.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Korea Maritime and Ocean University, 727, Taejong-ro, Yeongdo-gu, Busan, 49112, South Korea

    Gi-Yeol Gwak & Jong-Rae Cho

  2. Technical Service Team, Pessco, 303, Daedong-ro, Sasang-gu, Busan, 46981, South Korea

    Jin-Young Choi & Jae-Soo Kim

Authors
  1. Gi-Yeol Gwak
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Jong-Rae Cho
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Jin-Young Choi
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Jae-Soo Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Jong-Rae Cho.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Gwak, GY., Cho, JR., Choi, JY. et al. Forming-die-free integrated stub-end manufacturing process using spinning. Int. J. Precis. Eng. Manuf. 17, 679–684 (2016). https://doi.org/10.1007/s12541-016-0083-z

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12541-016-0083-z

Keywords

Search

Navigation