Abstract:
Ein Verfahren zum Herstellen eines Getriebelaufrads, welches als Schaltrad mit Kuppelverzahnung für ein Fahrzeug-Schaltgetriebe ausgebildet ist, umfasst die folgenden Verfahrensschritte: in einem ersten Verfahrensschritt (a) wird ein durch Warmumformen hergestellter Zahnradrohling mit Kuppelverzahnung geschmiedet, wobei die Zähne der Kuppelverzahnung mit einem das Einkuppeln fördernden Zahndach versehen sind, welche als Zahnüberbreiten ausgebildet sind, in einem zweiten Verfahrensschritt (b) wird der Zahnradrohling durch Kaltkalibrieren zu einem teilfertigen Schaltrad umgeformt, wobei die Zähne der Kuppelverzahnung in einer genauen Zwischenform mit Zahndach (t) und über die Zahnbreite gleichbleibendem Zahnquerschnitt ausgebildet werden, in einem dritten Verfahrensschritt wird das teilfertige Schaltrad (c) nochmals durch Kaltkalibrieren zu einem endfertigen Schaltrad umgeformt.
Abstract:
Systems and methods in accordance with embodiments of the invention implement bulk metallic glass-based macroscale compliant mechanisms. In one embodiment, a bulk metallic glass-based macroscale compliant mechanism includes: a flexible member that is strained during the normal operation of the compliant mechanism; where the flexible member has a thickness of.5 mm; where the flexible member comprises a bulk metallic glass-based material; and where the bulk metallic glass-based material can survive a fatigue test that includes 1000 cycles under a bending loading mode at an applied stress to ultimate strength ratio of.25.
Abstract:
A process for cold forging a metal fastener such as a self-clinching standoff includes a punch and die set at the final head trimming station which produces the shear burr only on the underside of the fastener head where it is not visible after installation. At this station, a fastener blank (16) having a tubular barrel and a temporarily formed circular head is placed into a bore of the punch (23) with a barrel of the fastener residing in the bore with the underside of the circular head abutting an end face of the punch. The forging apparatus then moves the die toward the top side of the fastener until a polygonal cutting edge of the die (12) shears metal from around the edges of the circular head of the fastener blank. Movement of the die stops when the cutting edge lies beyond the underside of the head of the fastener. At this point, a knock-out pin (21) which is reciprocal within the bore of the punch forcibly ejects the fastener through a passage in the die to a point beyond an opposite side of the die. The forging apparatus then moves the die away from the punch and, once the die is clear of the punch, a stripper sleeve (25) which is reciprocal about the outside surface of the punch moves from a retracted position over the end of the punch removing a residual scrap ring (18) from around the outside of the punch.
Abstract:
Systems and methods in accordance with embodiments of the invention implement bulk metallic glass-based macroscale compliant mechanisms. In one embodiment, a bulk metallic glass-based macroscale compliant mechanism includes: a flexible member that is strained during the normal operation of the compliant mechanism; where the flexible member has a thickness of.5 mm; where the flexible member comprises a bulk metallic glass-based material; and where the bulk metallic glass-based material can survive a fatigue test that includes 1000 cycles under a bending loading mode at an applied stress to ultimate strength ratio of.25.
Abstract:
An improved cartridge case completely produced net shape on a progressive cold former that includes a trim to lengthy station with an internal shearing tool.