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핫 프레스 포밍을 위한 고열전도성 금형에 대한 연구

Tough High Thermal-Conductivity Tool Steel for Hot Press Forming

  • 투고 : 2015.11.07
  • 심사 : 2016.04.26
  • 발행 : 2016.06.30

초록

Due to the need for advanced technologies in the automotive industry, the demand for lighter and safer vehicles has increased. Even though various nonferrous metals, like Aluminum, Magnesium and also Carbon Fiber Reinforced Plastic (CFRP), have been implemented in the automotive industry, a lot of technical research and development is still focused on ferrous metals. In particular, the market volume of High Strength Steel (HSS) parts and Ultra High Strength Steel (UHSS) by hot press forming parts has expanded significantly in all countries' automotive industries. A new tool steel, High Thermal-Conductivity Tool Steel (HTCS), for stamping punches and dies has been developed and introduced by Rovalma Company (Spain), and it is able to support better productivity and quality during hot press forming. The HTCS punches and dies could help to reduce cycle time due to their high thermal conductivity, one of the major factors in hot press forming operation. In this study, test dies were manufactured in order to verify the high thermal conductivity of HTCS material compared to SKD6. In addition, thermal deformation was inspected after the heating and cooling process of hot press forming. After heating and cooling, the test dies were measured by a 3D scanner and compared with the original geometry. The results showed that the thermal deformation and distortion were very small even though the cooling time was reduced by 2 seconds.

키워드

참고문헌

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피인용 문헌

  1. A Study on the Cooling Performance of Newly Developed Slice Die in the Hot Press Forming Process vol.8, pp.11, 2018, https://doi.org/10.3390/met8110947
  2. 탄소섬유복합재료의 시트크로스 부품에서 진공수지주입성형에 의한 성형성 평가 vol.16, pp.3, 2017, https://doi.org/10.14775/ksmpe.2017.16.3.024
  3. 실사이드 부품의 롤포밍공정에서 고주파유도가열 부가조건에 따른 기계적 특성 및 미세조직 평가 vol.16, pp.6, 2017, https://doi.org/10.14775/ksmpe.2017.16.6.087
  4. Smart Roll Forming Based on Real-Time Process Data vol.17, pp.5, 2016, https://doi.org/10.14775/ksmpe.2018.17.5.045
  5. Development of Direct Heating Press Mold for Energy Saving in Rubber Press Molding vol.28, pp.2, 2016, https://doi.org/10.7735/ksmte.2019.28.2.86
  6. 곡선형 냉각채널 금형을 사용한 프론트 필라 핫스탬핑 공정에서 금형냉각시간이 기계적 특성에 미치는 영향 vol.18, pp.6, 2016, https://doi.org/10.14775/ksmpe.2019.18.6.033