ESTIMATION METHOD OF AGGLUTINATION PORTION TO MOLD UPON FORMING

PROBLEM TO BE SOLVED: To provide an estimation method of an agglutination portion capable of estimating the portion on which agglutination to an aluminum-plated mold is easy to proceed in a hot stamp of an aluminum-plated steel plate.SOLUTION: A method for estimating a portion on which aluminum plating of a steel plate is agglutinated to a mold upon such a hot stamp that a heated aluminum-plated steel plate is press-formed by using the mold and is cooled in the mold to form an article includes an analysis step S1 for determining a temperature distribution, a surface pressure distribution and a distribution of surface compression stress of a steel plate on press forming and in a procedure of cooling upon the hot stamp by using an analysis in which a thermal analysis is linked with a structural analysis, a result processing step S2 for calculating a distribution of a product of the surface pressure and the surface compression stress on the basis of the surface pressure distribution and the distribution of the surface compression stress and a judgment processing step S3 for judging an agglutination generation state to the aluminum-plated mold on the hot stamp on the basis of the distribution of the product of the surface pressure and the surface compression stress. 【課題】アルミニウムめっき鋼板のホットスタンプで、アルミニウムめっきの金型への凝着が進行しやすい部位を予測可能な凝着部位の予測方法を提供する。【解決手段】加熱されたアルミニウムめっき鋼板を、金型を用いてプレス成形し、金型内で冷却して成形品に加工するホットスタンプに際し、鋼板のアルミニウムめっきが金型へ凝着する部位を予測する方法であって、当該予測方法は、熱解析と構造解析を連成させた解析により、ホットスタンプ時のプレス成形および冷却の過程における鋼板の温度分布、面圧分布および面内圧縮応力の分布を求める解析ステップＳ１と、面圧分布および面内圧縮応力の分布に基づき、面圧と面内圧縮応力との積の分布を演算する結果処理ステップＳ２と、面圧と面内圧縮応力との積の分布に基づき、ホットスタンプにおけるアルミニウムめっきの金型への凝着発生状態を判定する判定処理ステップＳ３とを含む。【選択図】図１