|3942351||Manufacture of hollow workpieces|
While performing an ironing operation (a specific kind of drawing operation) on a hollow workpiece by means of a mandrel or punch and a die, the workpiece is caused to leave the die at a speed exceeding the speed of the mandrel, and the resulting forward ...
|3934446||Methods of and apparatus for production of wire|
Methods of and apparatus for the production of wire are presented. Previously, the most economic and popular process was drawing. In each pass, a small reduction was obtained and normally several dies in tandem were mounted on a single wire drawing machin...