An integrated CAD/CAM system for CNG pressure vessel manufactured by deep drawing and ironing operation

Joon-Hong Park; Chul Kim; Jae-Chan Choi

doi:10.1007/bf02990862

An integrated CAD/CAM system for CNG pressure vessel manufactured by deep drawing and ironing operation

KSME International Journal ◽

10.1007/bf02990862 ◽

2004 ◽

Vol 18 (6) ◽

pp. 904-914

Author(s):

Joon-Hong Park ◽

Chul Kim ◽

Jae-Chan Choi

Keyword(s):

Pressure Vessel ◽

Deep Drawing ◽

Cad Cam

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A CAD/CAM system for deep drawing dies in a simple-action press

Journal of Materials Processing Technology ◽

10.1016/s0924-0136(98)00359-8 ◽

1999 ◽

Vol 87 (1-3) ◽

pp. 258-265 ◽

Cited By ~ 11

Author(s):

S.B Park ◽

Y Choi ◽

B.M Kim ◽

J.C Choi

Keyword(s):

Deep Drawing ◽

Cad Cam ◽

Simple Action ◽

Drawing Dies

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Design of a Combined Redrawing-Ironing Process to Manufacture a CNG Pressure Vessel Liner

Applied Sciences ◽

10.3390/app11188295 ◽

2021 ◽

Vol 11 (18) ◽

pp. 8295

Author(s):

Gunyoung Park ◽

Rockkyu Park ◽

Hyoseo Kwak ◽

Chul Kim

Keyword(s):

Pressure Vessel ◽

Deep Drawing ◽

Processing Time ◽

Continuous Process ◽

Installation Space ◽

Theoretical Formula ◽

Manufacturing Cost ◽

Second Stage ◽

Forming Load ◽

Forming Defects

The liner of a compressed natural gas pressure vessel is manufactured by D.D.I. (Deep Drawing and Ironing), which is a continuous process that uses deep drawing to reduce the diameter of a billet and ironing to reduce the thickness of the billet. In the second stage of the existing D.D.I. process, drawing and two steps of ironing have been performed separately with different dies, which requires a long processing time, high manufacturing cost, and installation space. To solve the above problems, this study suggests a new second stage using a combined redrawing-ironing die. A theoretical formula to calculate the forming load of the combined redrawing-ironing process was established and verified with finite element analysis results. The forming load, maximum thickness reduction ratio in the second stage, and forming defects in the third stage were analyzed by varying the redrawing-ironing ratio in the second stage. The results show that the number of dyes (3 → 1), punch diameter (394.1 mm → 383 mm), and processing time (39.8 s → 20 s) in the second stage were obtained to save production time and cost.

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