A deformed element pipe for hydraulic bulging having a peripheral length with an outer diameter gradually increasing or decreasing from one to the other axial side thereof and having a parallel part formed at least one end thereof, and a hydraulic bulging device and a hydraulic bulging method using the element pipe, the device and the method whereby, for example, even when a deformed steel pipe having a cross sectional shape varying in the axial direction as in a tapered pipe is hydraulically bulged, a bulging in which an internal pressure loading and an axial pressing are combined with each other can be performed to provide a larger expansion ratio than before and the joining and plug-in connection thereof to the other part can also be easily performed.

Profile element pipe for hydraulic bulging, hydraulic bulging device using the element pipe, hydraulic bulging method using the element pipe, and hydraulically bulged product

A structure for a side portion of a vehicle is configured in such a manner that a center pillar is provided with an upper pillar section which has an upper end joined to a roof side rail, and a lower pillar section which has a lower end joined to a side sill. The upper pillar section is configured from a hollow metallic pipe consisting of a high-strength steel plate, is bent so as to protrude outward in the width direction of the vehicle, and has a substantially constant cross-sectional shape. The lower pillar section has a closed cross-sectional shape and formed by joining two press-formed parts in the width direction of the vehicle, the two press-formed parts consisting of a steel plate having lower strength than the steel plate of the hollow metallic pipe of the upper pillar section. The lower edge of the upper pillar section is joined at the outer periphery thereof to the two press-formed parts while being inserted in the closed cross-sectional shape section formed by the two press-formed parts of the lower pillar section.

Structure for side portion of vehicle

[Zu losendes Problem] Die vorliegende Erfindung stellt eine Saulenstruktur fur einen Fahrzeugkarosserie-Hinterabschnitt bereit, welche die Verformung einer Saule unterdrucken kann, wenn in einem geschlossenen Zustand der Schiebetur eine nach ausen gerichtete Last in einer Fahrzeugbreiterichtung auf die Schiebetur einwirkt. [Losung] Eine Saulenstruktur fur einen Fahrzeugkarosserie-Hinterabschnitt, bei der eine Schiebetur 6 bereitgestellt ist, welche einen in einer Fahrzeugseitenflache vorgesehenen Offnungsabschnitt 3b offnet und verschliest, bei der ein Saulenabschnitt C an einer Fahrzeugkarosserie-Hinterabschnittseite des Offnungsabschnitts 3b aus einem geschlossenen Abschnitt eines Innenblechs 4 und eines Ausenblechs 2 zusammengesetzt ist und bei der ein Fixierungsmechanismus 11, welcher einen hinteren Abschnitt der Schiebetur 6 in einer geschlossenen Position der Schiebetur 6 fixiert, an dem Saulenabschnitt C an der Fahrzeugkarosserie-Hinterabschnittseite bereitgestellt ist, wobei der Fixierungsmechanismus 11 auf einer Flache bereitgestellt ist, die gegenuber einer Fahrzeugkarosserie-Vorderseite des Saulenabschnitts C an der Fahrzeugkarosserie-Hinterabschnittseite liegt, bei der ein Saulenverstarkungskorper 7, der im Horizontalschnitt einen viereckigen geschlossenen Querschnitt bildet, intern an einer Innenflache des Saulenabschnitts C an der Fahrzeugkarosserie-Hinterabschnittseite montiert ist, an welcher der Fixierungsmechanismus 11 montiert ist, und bei der ein Innenraumseiten-Verstarkungselement 10 zwischen dem Saulenverstarkungskorper 7 und dem Innenblech 4 angeordnet ist, um in einer Fahrzeugbreiterichtung einen Spalt α zwischen dem Innenraumseiten-Verstarkungselement 10 und dem Saulenverstarkungskorper 7 zu bilden.

Pillar structure for vehicle body rear portion

In a vehicle body side portion structure, a center pillar includes an upper pillar section joined to a roof side rail and a lower pillar section joined to a side sill, the upper pillar section including a metallic pipe having a high-strength steel plate, has a substantially constant cross-sectional shape, and is convexly curved outwardly in a vehicle width direction, the lower pillar section is formed by two pressed components including a steel plate having lower strength than the steel plate of the hollow metallic pipe of the upper pillar section and are joined to each other into a closed cross-sectional shape, and the upper pillar section is joined to the two pressed components such that the lower edge part of the upper pillar section is inserted within a section configured by the two pressed components of the lower pillar section and having the closed cross-sectional shape.

Vehicle body side portion structure

The present invention was made with the object of eliminating the short pipe member when attaching a bolting nut to a hydroformed part, preventing an increase in the difficulty of hydroforming for attaching the nut, extending the nut length so as to enable sufficient strength at the time of bolting, and enabling application even to thin wall hydroformed parts and comprises inserting a metal pipe into a split mold having a pierce punch able to be moved perpendicular to an axis of the inserted metal pipe or in a slanted direction, having a front part narrower than a center part, and having around the front part a nut having an inside diameter larger than an outside diameter of the front part and smaller than an outside diameter of the center part; hydroforming it; then making the pierce punch advance to pierce part of the hydroformed part and pushing the nut by a center part arranged behind the nut and embedding the nut in the metal pipe.

Piercing method and piercing apparatus using hydroforming and hydroformed part and structure

PROBLEM TO BE SOLVED: To provide a hydroformed product for improving the quality of a forming having an external section gradually and variously changing its outer diameter. SOLUTION: The hydroformed part is obtained by a method that a tube stock 18, which is roughly conical shape obtained by rolling a steel plate member 18a of roughly trapezoidal shape to trace an external shape change of a product, is subjected to hydroforming. Thus, in the case of the product 14 to have the external section changing gradually and variously its external diameter, the high quality product 14 with a tube expanding rate falling in a restricted range is obtained. COPYRIGHT: (C)2001,JPO

Hydroforming, hydroforming method of the forming and vehicle member using hydroforming

PROBLEM TO BE SOLVED: To provide a hydroformed part capable of improving quality of a product having a small diameter part. SOLUTION: In the hydroformed part among products 14 having a small diameter part 15b smaller than other sections, by forming a section 16 recessed inward to part of a peripheral wall of the small diameter part 15b so that a peripheral length of the small diameter part 15b is roughly the same as a peripheral length of other sections, even for a product 14 having the small diameter part 15b, the product 14 of high quality accommodating a tube expansion rate in a restricted range is obtained.

Hydroformed part, method for hydroforming the formed part and vehicle member using the hydroformed part

PROBLEM TO BE SOLVED: To provide a fixture capable of mounting a vehicle fastening seat member for mounting an exterior mounting part while maintaining a light weight and not requiring a troublesome work/process. SOLUTION: The fixture of the vehicle body is constructed so that a long/ narrow main body 3 forming a tube stock 5 by hydroforming is used, a short tubular member 16 having a nut part 15 for fastening an exterior mounting part 2 is fixed to a prescribed position of an outer peripheral part of the main body 3 with using bulging of the tube stock 5 caused by hydroforming, a part to fasten the exterior part 2 is assembled to the main body in forming the main body 3, the nut part 15 is reasonably assembled to the exterior fixture 2 without requiring a troublesome work/process, further, the main body 3, by work hardening caused through hydroforming, is provided with high toughness in spite of a thin wall so as not impair weight reduction of the fixture 2.

Fixture of vehicle body exterior part

PROBLEM TO BE SOLVED: To provide a skeleton member of a vehicle body capable of developing an advantage of hydroforming to the maximum and increasing rigidity strength of a linear part concentratedly. SOLUTION: The skeleton member of a vehicle body is constituted so that it has a linear part 7 at an end side, and when forming a side member 6 having a bent part 8 at its middle part by hydroforming, forming is conducted by taking a tube expanding rate of the linear part 7 larger than a tube expanding rate of a bent part 8, thus at the linear part 7, high rigidity strength is obtained by a synergism effect of work hardening and stock feeding due to elongation of a peripheral wall of the tube stock 10, and at the bent part 8, forming is conducted well without causing breaking, an advantage of hydroforming is taken to the maximum, the side member having rigidity strength increased concentratedly at the linear part 7 is obtained.

Skeleton member of vehicle body and forming method therefor

The invention provides a sealing material fixing structure of a vehicle cover plate decorating part, which stably discharges rain water invading into an insertion slot for fixing a front window from the insertion slot at a certain position, and thus improves the water discharge performance. In the sealing material fixing structure of the vehicle cover plate decorating part, the insertion slot (14) is formed on the cover plate decorating part (10) at the back part of the front cover of the vehicle and extends in the vehicle width direction; a sealing material (15) extending in the vehicle width direction and the front end of the vehicle front window are inserted together into the insertion slot (14) in a fitting manner, and the front window is fixed in the cover plate decorating part (10); the cover plate decorating part (10) is provided with a first flange part (20) for supporting an end part (15c) of the sealing material (15) in the vehicle width direction, and a gap (21) is formed between a lower wall (17) forming the insertion slot (14) and the sealing material (15) at the end part of the insertion slot (14) in the vehicle width direction.

Yamada Naoaki

Papers

Hydroforming, hydroforming method of the forming and vehicle member using hydroforming

Hydroformed part, method for hydroforming the formed part and vehicle member using the hydroformed part

Fixture of vehicle body exterior part

Skeleton member of vehicle body and forming method therefor

Sealing material fixing structure of vehicle cover plate decorating part