DOOR BEAM AND MANUFACTURING METHOD FOR THE SAME

• Main Authors: SHIMOAKA SHINGO, HASHIMOTO SEIICHI, TSUYOSHI TSUNETAKE
• Format: Patent
• Language: English; Japanese
• Published: 16.02.2017
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FORVEHICLES; TRANSPORTING; VEHICLES IN GENERAL; WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILARDEVICES FOR VEHICLES; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

PROBLEM TO BE SOLVED: To securely buckle a pair of webs outward when crushing processing is performed at end parts of door beam made of an aluminum alloy extruded material.SOLUTION: A door beam comprises: an inner flange 2; an outer flange 1; and an aluminum alloy extruded material including a pair of webs 3, 4 connecting the inner flange and the outer flange, wherein crushing processing is performed at end parts in a height direction of webs 3, 4 so that the webs 3, 4 are buckled outward. In a cross section of the door beam before the crushing processing, the outer flange 1 is curved in a recessed shape with a predetermined curvature toward an outer side. The crushing processing causes the outer flange 1 to reduce its curvature or to be flat.SELECTED DRAWING: Figure 1 【課題】アルミニウム合金押出形材からなるドアビームの端部に潰し加工を施す場合に、一対のウエブを確実に外側に座屈させる。【解決手段】インナーフランジ２及びアウターフランジ１と、これらを連結する一対のウエブ３，４を有するアルミニウム合金押出形材からなり、端部がウエブ３，４の高さ方向に潰し加工され、ウエブ３，４が外側に座屈したドアビーム。潰し加工前のドアビームの断面は、アウターフランジ１がアウター側に所定の曲率で凸湾曲している。潰し加工により、アウターフランジ１は曲率が低下し又は平坦化される。【選択図】図１