MANUFACTURING METHOD FOR HOLLOW RACK BAR AND HOLLOW RACK BAR MANUFACTURING APPARATUS

A manufacturing method for a hollow rack bar made of a hollow shaft material and including a toothed section which has a rack on an outer surface and a shaft section which is formed thinner than the toothed section, the manufacturing method includes drawing the hollow shaft material by using a die a...

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Bibliographische Detailangaben
Hauptverfasser:	UEMOTO, Toshifumi, YAMAWAKI, Takashi, ISHIKI, Nobumoto
Format:	Patent
Sprache:	eng
Schlagworte:	LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL MOTOR VEHICLES PERFORMING OPERATIONS PUNCHING METAL TRAILERS TRANSPORTING
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Beschreibung
Zusammenfassung:	A manufacturing method for a hollow rack bar made of a hollow shaft material and including a toothed section which has a rack on an outer surface and a shaft section which is formed thinner than the toothed section, the manufacturing method includes drawing the hollow shaft material by using a die and a plug, and preforming regions of the hollow shaft material including a toothed section forming region configured to form the toothed section and a shaft section forming region configured to form the shaft section to have thicknesses according to the regions respectively, and forming the rack at the toothed section forming region of the hollow shaft material which is preformed.