To provide a vehicle body frame of a two-wheeled vehicle which includes a head pipe having good dimensional accuracy. A head pipe 31 includes a left head half 45L which is obtained by die forming, a right head half 45R which is obtained by die forming, and beads 73, 74 with which the right head half 45R is integrated with the left head half 45L by laser welding. The head pipe 31 is formed by joining the left head half 45L and the right head half 45R to each other with the first and second beads 73, 74 which are laser weld beads. Laser weld beads are significantly smaller in bead width than arc weld beads, and therefore their shrinkage after their solidification is significantly smaller. As a result, a head pipe 31 having good dimensional accuracy is obtained.
Vehicle body frame of two-wheeled vehicle
Fahrzeugkarosserierahmen für ein Zweiradfahrzeug
Châssis de carrosserie de véhicule à deux roues
30.09.2015
Patent
Elektronische Ressource
Englisch
IPC: | B62K Fahrräder , CYCLES |