Forging apparatus

Patent metadata

Field	Value
Publication number	US-9718118-B2
Application number	US-201414577430-A
Country	US
Kind code	B2
Filing date	Dec 19, 2014
Priority date	Jan 9, 2014
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A forging apparatus and method is disclosed in which an extrusion punch is held between an upper press and a lower press and propelled towards a billet by a ram to form an extruded shaped component. The extrusion punch has a striking face in which a recess is formed. During the extrusion process, material from the billet enters the recess so as to lock the extrusion punch and the shaped component together. Accordingly the shaped component is not lifted up with the upper press when it is separated from the lower press and so the position of the shaped component after the forging extrusion operation is known accurately and reliably.

First claim

I claim:

1. A method of forging a shaped component comprising:
positioning a billet in a lower press;
moving an upper press into engagement with the lower press so as to locate the billet between the upper press and the lower press;
striking the billet with a striking surface of an extension punch in a forging direction so as to force the billet into a cavity formed by the upper and lower presses, the cavity defining the shape of the shaped component; and
moving the upper press and the lower press away from each other, wherein:
the extrusion punch comprises a recess formed in the striking surface into which material from the billet enters as the billet is forced into the cavity, thereby locking the shaped component and the extrusion punch together such that both the shaped component and the extrusion punch remain locked together in the lower press as the upper and lower presses are moved away from each other.

2. A method of forging a shaped component according to claim 1 , further comprising:
positioning the extrusion punch in the lower press before moving the upper press into engagement with the lower press; and
striking the extrusion punch with a separate ram so as to cause the striking of the billet with the extrusion punch.

3. A method of forging a shaped component according to claim 1 , wherein:
the upper and lower presses move relative to each other in a clamping direction, the clamping direction being perpendicular to the forging direction; and
the extrusion punch and shaped component are locked together at the recess so as to restrain relative movement in the clamping direction more than in the forging direction.

Assignees

• Rolls Royce Plc

Inventors

• Mcbain John

Classifications

• B21C23/183

  by forward extrusion · CPC title

• B21K3/04

  blades, e.g. for turbines; Upsetting of blade roots · CPC title

• B21K3/00 Primary

  Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like · CPC title

• B21J5/025

  Closed die forging · CPC title

• B21J9/027

  with punches moving along auxiliary lateral directions (B21J13/025 takes precedence) · CPC title