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A Study for Stamping of Patchwork with Resistance Spot Weld

저항 점용접에 의한 실러 패치워크 적용 판재 프레스 성형 연구

  • Received : 2018.04.11
  • Accepted : 2018.08.03
  • Published : 2018.08.31

Abstract

Recently, research on the development of lightweight vehicle bodies is increasing continuously as a response to fuel economy regulations. To reduce the weight of a vehicle body, a conventional steel plate has been substituted by light weight material with high specific strength and the jointing of multi-materials is generally applied. On the other hand, the customer's demand for safety and emotional quality in NVH (Noise, Vibration and Harshness) is becoming increasingly important. Therefore, a light weight with proper strength and NVH quality is needed. In the view of light weighting and NVH quality, the application of a vibration proof steel plate can be an effective solution but the formability of a sandwich panel is different with a conventional steel sheet. Therefore, careful analysis of formability is required. This study aims to characterize the formability of a sandwich high-strength steel plate. The high-strength steel plates of different thicknesses with resistance spot welding and sealer bonding were analyzed using forming limits diagram through a cup drawing test.

Keywords

Cowl Module;FEM;Forming Limit Diagram;Sealer Patchwork;Stamping

Acknowledgement

Supported by : 한국산업기술진흥원

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