Hollow stabilizer and method of manufacturing the same

Abstract

In a method of manufacturing a hollow stabilizer, a pipe compressing step of compressing an electroseamed pipe in a temperature range of a hot state or a warm state so as to make a rate of a thickness with respect to an outer diameter between 18 and 35% is performed, and a forming step of forming the compressed electroseamed pipe in a stabilizer shape in a cold state is executed. Next, a step of applying a heat treatment to a half-finished stabilizer is performed, a shot peening step of impacting a shot on the half-finished stabilizer is performed, and a step of coating the half-finished stabilizer is performed.

What is claimed is:  
     
         1 . A method of manufacturing a hollow stabilizer comprising: 
 a pipe compressing step of compressing an electroseamed pipe in a temperature range of a hot state or a warm state so as to make a rate of a thickness with respect to an outer diameter between 18 and 35%;    a forming step of forming the compressed electroseamed pipe in a stabilizer shape in a cold state;    a step of applying a heat treatment to a half-finished stabilizer;    a shot peening step of impacting shot on the half-finished stabilizer; and    a step of coating the half-finished stabilizer.    
     
     
         2 . A method of manufacturing a hollow stabilizer comprising: 
 a pipe compressing step of compressing an electroseamed pipe in a temperature range of a hot state or a warm state so as to make a rate of a thickness with respect to an outer diameter between 18 and 35%;    a forming step of forming the compressed electroseamed pipe in a stabilizer shape in a cold state;    a step of applying a heat treatment to a half-finished stabilizer;    a shot peening step of impacting shot on the half-finished stabilizer; and    a step of coating the half-finished stabilizer.    
     
     
         3 . A hollow stabilizer formed by bending a material obtained by compressing an electroseamed pipe in a temperature range of a hot state or a warm state so as to make a ratio of thickness with respect to an outer diameter between 18 and 35%, whereby the thickness ratio is made between 18 and 35% and shot peening is applied to an outer surface portion.