Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method of making a forging in closed-dies










Image Number 8 for United States Patent #4967584.

A closed-die forging having an annular flat surface portion and a corner portion at an outer periphery of the annular flat surface portion is made by a method consisting of a rough forging process and a finish forging process. In the rough forging process, a rough forged product is shaped so as to have an annular flat surface portion smaller in outer diameter than the first mentioned annular flat surface portion and a conical surface portion at an outer periphery of the second mentioned annular flat surface portion. The conical surface portion is so shaped as to extend increasingly outwards as it extend in the same direction of movement of a punch of a rough forging die for performing a forming operation. In the finish forging process, the conical surface portion is pushed by a punch of a finish forging die in the same direction as the rough forging product is pushed by the first mentioned punch in the rough forging process and thereby formed together with the second mentioned annular flat surface into the first mentioned annular flat surface portion perpendicular to the direction of movement of the second mentioned punch.








 
 
  Recently Added Patents
Implant for performance enhancement of selected transistors in an integrated circuit
Organizer
LED drive circuit
Pulsed plasma with low wafer temperature for ultra thin layer etches
Driving apparatus having an optical sensor and a thermal sensor for thermal and aging compensation of backlight module and driving method of backlight module
Gangable electrical box and leveling assembly
Virtual links in a routed ethernet mesh network
  Randomly Featured Patents
Portable, modular, small appliance control system
Image display device, image display method, and program
Iterative predictor-based detection of image frame locations
Data recording method and data recording system
Method of producing a permanent magnet rotor
Lock assembly assembled without a bolt
Differential protection device
Apparatus for insulated isothermal polymerase chain reaction
Two-dimensional optical scanner and light stimulus apparatus
Hierarchical structured abstract file system