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
Field emission cathode device and field emission display using the same
Advertising system and method
Method and apparatus for detection of the remote origin fraction of radon present in a measuring site
Disk drive
Address generation unit for accessing a multi-dimensional data structure in a desired pattern
Mobile communication device monitoring systems and methods
Case for electronic device
  Randomly Featured Patents
Reinforced polymer panel and method for building construction
Liquid applicator
Methods for wafer-level packaging of microfeature devices and microfeature devices formed using such methods
Retroreflective articles having light-transmissive surfaces
Electro-sensitive composition
Extrusion molded facade panel
Electrochemical cell having a mass flow field made of glassy carbon
Valve for controlling the temperature of the water in a washing machine or dishwasher, methods of treating water in these machines which can be implemented by means of said valve and machines
Exterior surface configuration of an automobile front light assembly
Simplified radon testing package