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Hot-stamping die-cooling system for vehicle door beams

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Abstract

The need for lightweight automobiles has promoted the rapid development of hot stamping. The cooling system of the hot-stamping die determines the performance of hot-stamped workpieces. By establishing a simplified hot-stamping model, we determined that the temperature-time curve of a workpiece is an exponential function. Our research results showed that the depth from the die surface to the cooling pipes has the biggest impact on the cooling rate and uniformity of the workpiece; the correct depth must be ensured to obtain a uniform quenching rate. By studying the cooling buffer flumes, we discovered that the water flow in the pipes becomes more uniform with increasing flume width. With an increase in the flume height, the water flow uniformity in the pipes first increased, and then decreased. In addition, augmenting the pipe diameter near the inlet improved the water flow uniformity in the pipes.

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Abbreviations

D :

cooling pipe diameter

a :

space between two pipes

b :

depth from die surface to cooling pipes

y :

workpiece temperature

x :

cooling time

\(\bar \nu \) :

flow uniformity in the middle of pipes

v max :

max. flow velocity in the middle of pipes

v min :

min. flow velocity in the middle of pipes

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Authors and Affiliations

  1. State Key Laboratory of Advanced Forming Technology and Equipment, Advanced Manufacture Technology Center China Academy of Machinery Science & Technology, Beijing, 100083, China

    Zhong-de Shan, Yong-sheng Ye & Mi-lan Zhang

  2. School of mechanical engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Yong-sheng Ye & Bao-yu Wang

Authors
  1. Zhong-de Shan
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  2. Yong-sheng Ye
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  3. Mi-lan Zhang
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  4. Bao-yu Wang
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Correspondence to Zhong-de Shan.

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Shan, Zd., Ye, Ys., Zhang, Ml. et al. Hot-stamping die-cooling system for vehicle door beams. Int. J. Precis. Eng. Manuf. 14, 1251–1255 (2013). https://doi.org/10.1007/s12541-013-0170-3

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  • DOI: https://doi.org/10.1007/s12541-013-0170-3

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