Forging mold manufacturing process of towing bar

Abstract

A process operating a forging mold for manufacturing a towing bar involves having a softened aluminum material after preheating in a mold; the mold contains a molding cavity; one end of the cavity is provided with a contour of a gooseneck of the towing bar and another end is provided with a contour of a middle section of a shank of the towing bar; the mode is then incorporated with an extension mold containing an extension hole for molding an extended section of the shank of the towing bar; a punch performs forging process on the aluminum material in the cavity externally from the extension hole; and the aluminum material is extruded by the punch to extend for a preset length in the direction towards the extension mold to complete the molding of the towing bar.

1 . A process operating a forging mold for manufacturing a towing bar comprising the following steps:
 a. Have a preheated and softened aluminum material in a mold containing a molding cavity, one end of the cavity is made in a contour of a gooseneck of the towing bar; and another end, a middle section of a shank of the towing bar;   b. An extension mold is connected to the mold and provided with an extension hole for molding an extended section of the middle section of the shank of the towing bar;   c. A punch performs forging on the aluminum material in the cavity externally from the extension hole; and   d. As extruded by the punch, the aluminum material extends in the direction of the extension mold for a preset length to complete molding of the towing bar.   
   
   
       2 . The process operating a forging mold for manufacturing a towing bar as claimed in  claim 1 , wherein one end of the punch penetrates into the molding cavity at where the gooseneck of the towing bar and the shank of the towing bar are connected to each other. 
   
   
       3 . The process operating a forging mold for manufacturing a towing bar as claimed in  claim 1 , wherein the punch is provided with a square shank in the shape of a bar. 
   
   
       4 . The process operating a forging mold for manufacturing a towing bar as claimed in  claim 1 , wherein the end of the punch is tapered.