| 摘要 |
A reinforcement part 4 for a roof side member of a motor vehicle, the reinforcement part is configured in one piece and has cross sections 12, (14, fig. 6). The cross sections vary in a vehicle longitudinal direction and are formed to steadily merge into one another. The cross sections have a steady contour on a circumference and are of a closed design. The reinforcement part may be produced according to an internal pressure method. The internal pressure method may be a blowforming method. The internal pressure method may be a hydroforming method. The reinforcement part may extend on a vehicle from an A pillar 2 to a D pillar 3. The reinforcement part may be arranged in a guide rail (7) for a vehicle sliding door. A roof side member is also provided, the roof side member comprising the reinforcement part, a one piece inner panel (5, fig 3) comprising a bulge (6) for a portion of a guide rail of a sliding door.
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