To provide a method of press-forming an automobile outer panel that forms a character line while preventing a line shift, and a press-forming device.SOLUTION: A method of press-forming an automobile outer panel according to the present invention is a method that press-forms a metal blank 51 into an automobile outer panel 61 having a character line 63 and panel face parts 65a and 65b by using a punch 3, a die 5, and a blank holder 7. A die-side forming face part 5b for forming the panel face part 65a is provided with an elastic body 9 protruded toward the punch 3 side. The method includes the steps of abutting the elastic body 9 before the die 5 against the metal blank 51, and squashing the elastic body 9 to press-form the metal blank 51 while pressing the same. In the method, the elastic body 9 is protruded from the die-side forming face part 5b such that friction force between the squashed elastic body 9 and the metal blank 51 becomes equal to or more than an absolute value of a difference in tensile force generated on both sides of a portion 53 corresponding to the character line 63.SELECTED DRAWING: Figure 1
【課題】線ずれを防止してキャラクタラインを形成する自動車用外板パネルのプレス成形方法及びプレス成形装置を提供する。【解決手段】本発明に係る自動車用外板パネルのプレス成形方法は、パンチ3とダイ5とブランクホルダ7とを用い、金属素板51を、キャラクタライン63とパネル面部65a及び65bとを有する自動車用外板パネル61にプレス成形するものであって、パネル面部65aを成形するダイ側成形面部5bに、パンチ3側に突出させた弾性体9を設け、弾性体9をダイ5に先行して金属素板51に当接させるステップと、弾性体9を押し潰して金属素板51を押圧しながらプレス成形するステップと、を備え、押し潰された弾性体9と金属素板51との摩擦力が、キャラクタライン63に相当する部位53の両側に生じる張力の差の絶対値以上となるように、弾性体9をダイ側成形面部5bから突出させるものである。【選択図】 図1
METHOD OF PRESS-FORMING AUTOMOBILE OUTER PANEL AND PRESS-FORMING DEVICE
自動車用外板パネルのプレス成形方法及びプレス成形装置
2021-04-08
Patent
Electronic Resource
Japanese
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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