Metal deforming – By use of closed-die and coacting work-forcer – With stripping or ejecting from tool
Patent
1989-01-23
1990-02-20
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
With stripping or ejecting from tool
B21J 1308
Patent
active
049015567
DESCRIPTION:
BRIEF SUMMARY
This invention relates to apparatus and a method for ejecting a die-formed component from a segmented die and reloading the die with a fresh billet from which another component is to be formed, in particular where the die-formed component is locked into the die and is releasable only by separating the segments of the die. In the embodiment hereafter described by way of example, the component is an inner member for a cross-groove type of constant velocity ratio universal joint.
The object of the invention is to enable the cycle of ejecting the die-formed component and reloading the die with a corresponding fresh billet to be performed more rapidly than hitherto.
According to a first aspect, the invention provides apparatus for use in die-forming components, comprising:
a segmented die comprising a number of circumferentially disposed segments defining an axial bore between end faces thereof shaped to receive successive billets, and a transversely-extending cavity communicating with the bore into which the billet flows under axial compression as a component is formed;
a die block shaped to receive the die;
ejection/load apparatus for ejecting a formed component from the die and reloading the die with a corresponding fresh billet from which another component is to be formed, comprising means for feeding a fresh billet to one end of the said bore with the die block positioned at an injection/load station, and means for plunging the fresh billet through the bore to abut against one of said components formed and locked in the die thus to force the die partially out of the die block to permit separation of the die segments, and, on separation of the die segments sufficiently to release the component from the die, to plunge the fresh billet further in the same direction through the opened die to push the component free of the die and permit the die to return to the die block;
and means for removing the freed component from the ejection/load apparatus once the die has returned to its closed state received in the die block.
According to a second aspect, the invention provides apparatus for ejecting a die-formed component from a segmented die positioned at an ejection/load station and reloading the die with a fresh corresponding billet from which another component is to be formed, the die comprising a number of circumferentially disposed segments received in a die block and defining an axial bore between end faces thereof shaped to receive successive billets, and transversely-extending cavity communicating with the bore into which the billet flows under axial compression as the component is formed, the apparatus comprising:
means for feeding the fresh billet to one end of the said bore;
means for plunging the fresh billet axially through the bore to abut against the component formed and locked in the die thus to force the die partially out of the die block to permit separation of the die segments, and, on separation of the die segments sufficiently to release the component from the die, to plunge the fresh billet further in the same axial direction through the opened die to push the component free of the die and permit the die to return to the die block;
and means for engaging and resiliently biasing the component axially towards the die centre, in opposition to the direction of action of the plunging means, to force the fresh billet into the bore, and the component onto an end face of the die adjacent one end of the bore, once the component has been freed from the die.
Such apparatus, according to either aspect of the invention, is capable of operating automatically and cyclically in conjunction with a press for compressing the billet within the die to form the component. By combining the reloading of the die with a fresh billet with the ejection of the previously-formed component from the die in the manner described, the apparatus is capable of operating particularly rapidly.
According to a third aspect, the invention provides a method of ejecting a die-formed component from a segmented die and reloading the die wi
REFERENCES:
patent: 2787828 (1957-04-01), Cousino
patent: 2987932 (1961-04-01), Frueauff
patent: 3120769 (1964-02-01), Hatebur
patent: 4693109 (1987-09-01), Connor et al.
Larson Lowell A.
PFD Limited
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