To provide a technology which can suppress the occurrence of a crack at a step part while suppressing an increase of the number of processes when manufacturing a door inner panel by press-processing an aluminum alloy plate material.SOLUTION: A manufacturing method of a door inner panel includes a first process for making a first boundary part of a first metal mold contact with a blank material in a state that an external peripheral part of the blank material is held, and a second process for making a third boundary part of the first metal mold contact with the blank material simultaneously when a fourth boundary part of a second metal mold contacts with the blank material by moving at least either of the first metal mold and the second metal mold in an approximation direction, or before the fourth boundary part contacts with the blank material.SELECTED DRAWING: Figure 6

    【課題】アルミニウム合金製板材からプレス加工によってドアインナパネルを製造する際に、工程数の増加を抑制しつつ段差部に割れが生じることを抑制できる技術を提供する。【解決手段】ドアインナパネルの製造方法は、ブランク材の外周部が保持された状態で、第1金型の第1境界部を前記ブランク材に接触させる第1工程と、接近方向に前記第1金型及び前記第2金型の少なくとも一方を移動させることにより、前記第2金型の第4境界部が前記ブランク材に接触すると同時に、又は前記第4境界部が前記ブランク材に接触する前に、前記第1金型の第3境界部を前記ブランク材に接触させる第2工程と、を含む。【選択図】図6


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    Title :

    MANUFACTURING METHOD OF AUTOMOBILE DOOR INNER PANEL AND AUTOMOBILE DOOR INNER PANEL


    Additional title:

    自動車用ドアインナパネルの製造方法及び自動車用ドアインナパネル


    Contributors:

    Publication date :

    2021-11-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL , Bearbeiten oder Verarbeiten von Blechen, Metallrohren, -stangen oder -profilen ohne wesentliches Abtragen des Werkstoffs / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge



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