Manufacture of high strength hollow stabilizer

Abstract

Abstract PURPOSE:To obtain a hollow stabilizer having high strength and remarkably improved durability for fatigue by upsetting and bending an electric welded steel pipe in hot state and increasing the wall thickness of a part to be bent. CONSTITUTION:An electric welded steel pipe 1 is heated by a high-frequency induction heating device 2 by winding a high-frequency heating coil 3 only around a part 1 to be bent. Next, the pipe 1 is sent to an upsetting device to upset only the heated part by forcing in punches 5 from its both sides in a state of restricting its outer diameter by an outer-diameter restricting device 4 to increase the wall thickness of said part to the inner-diameter side. nest the pipe 1 is bent by a bending die 7 and a bending punch 6. After finishing the bending, this hollow stabilizer 8 is dipped in the water to perform its hardening by quenching.

Inventors

• 👤 Takashi Morikawa
• 👤 隆 森川

Bibliographic Details