US2840026A

US2840026A - Press serving mechanism

Info

Publication number: US2840026A
Application number: US531441A
Authority: US
Inventors: Jr Walter S Eggert
Original assignee: Budd Co
Current assignee: ThyssenKrupp Budd Co
Priority date: 1955-08-30
Filing date: 1955-08-30
Publication date: 1958-06-24
Anticipated expiration: 1975-06-24

Description

INVENTOR Walter Siggertlr.

2 Sheets-Sheet l W. S. EGGERT, JR

PRESS SERVING MECHANISM up "Eu Wm ATTORNEY June 24, 1958 Filed Aug. 30, 1955 June 24, 1958- w. s. EGGERT, JR

PRESS SERVING MECHANISM 2 Sheets-Sheet 2 Filed Aug. 30, 1955 INVENTOR Walter SiqgzrUr.

ATTORNEY PRESSSERVING,MECHANISM 7 Walter S'..Eggert, Jr., Philadelphimtla, assignor .to The Budd Company, Philadelphia, Pa a corporation of Pennsylvania Application Augustl30, 1955, Serial No. 531,441

1 Claim. (Cl. 111-50 This invention relates to press serving mechanism and has for an object the provision of improvements in this art.

One of the particular objects is to provide mechanism which will eject the workpiece very rapidly after it has been formed by the press.

Another object is to provide ejecting mechanism which will first move the workpiece clear of'press parts and then eject it.

Another object is to provide ejecting mechanism which will act without sharp blows on the workpiece so as to avoid injuring it. 1

Another object is to provide an ejector having means for locating a workpiece when fed to the press and for holding it accurately in position to engage the press parts.

Another object is to provide an ejector having a tilting holder which is moved to an inclined position when a workpiece is to be ejected.

Another object is to provide an ejector having a pushout element which is maintained closely adjacent the workpieceand which is made as a replaceable part and of a material which will not injure the press if it accidentally gets between the dies.

The above and other objects and advantages of the invention will be apparent from the following description of an exemplary embodiment, reference beingmade to the accompanying drawings, wherein:

Fig. 1 is a plan view of the ejector mechanism alone and showing a workpiece in chain lines;

Fig. 2 is a vertical section taken on the line 2-2 of Fig. 1 and showing the blank and parts of a press with the press closed;

Fig. 3 is a view like Fig. 2 but showing the press in partly open position and the workpiece being removed;

Fig. 4 is a transverse vertical section taken on the line 44 of Fig. 1; and

Fig. 5 is a transverse vertical section taken on the line 5-5 of Fig. 1.

The press with which the present serving mechanism is illustrated comprises abase 10, a lower die 11, and an upper die 12 carried by a ram so as to have reciprocatory movement from and toward the lower die.

The particular article or workpiece on which the press operates is a hub drum W having an end disk Wa secured in the cast drum proper Wb. When the drum is cast around the outer edges of the disk it causes deformation of the disk so it is necessary to give the disk a restrike stroke in the finishing dies to straighten and true it.

The serving mechanism with which the present invention isparticularly concerned comprises a slide 15 which has the general shape of an elongated horseshoe and which is mounted toward-the oiftake open end on pivots 16 carried by bearings mounted on the press base. A flange We of the drum rides on the sides of the slide and when the slide is raised at the front end to clear the drum from the lower die after the upper die has reice tractedi enough for clearance the drum. may move oh the open.outer end of the slide to any desiredreceiving means. For example it may be deposited upona travelling conveyor which will take it away.

Means are provided. for raising the front end of the slide, the means hereshown comprising alift 17 in the form of an air cylinder carried by pivots. 18 on bearings 19. mounted on the press base and having apiston rod 20'piv otally connected by a journal means 21 and bearing brackets 22. to the frontendof the Slide.

Means are provided on the slide for positively and quickly forcing the workpiece off the slide when the slide has been moved up sufiiciently to clear the workpiece from the die, the means here shown comprising a push-off device 25 in the form of an air cylinder secured beneath the slide and having a piston rod 26 for acting upon the workpiece. The tip 27 of the piston rod which stands closely adjacent the side of the drum may be formed of a material such as nylon which is resilient and softer than the drum so that it will not injure the drum and which will have a very long life. There is another advantage in using a compressible non-metallic material and that is that the press will not be injured if it should by chance close on the tip. The tip is made detachable, as by being screwed on the piston rod so as to be readily replaceable if injured or worn; Since the tip is located close to the side of the workpiece it does not act with a hammer blow to injure the workpiece.

A shock absorbing element 30, as of Fabreeka, may be used for cushioning the drop of the slide.

In operation, a drum is placed by a Workman in the front end of the slot in the slide and pulled forward until it seats properly in the lower die, the slide being down in its lower position. When the drum is seated in the die its flange stands clear a short distance above the slide.

The press operates to re-shape the disk or head of the drum and as the upper die withdraws the lift 17 acts to raise the front end of the slide to clear the drum from the lower die. .When the slide is at the top of its stroke, normally while the ram is still rising, the pushoff device 25 acts to force the drum rapidly off the outer end of the slide. The push-off device then withdraws and the lift lowers the slide ready for a new drum to be fed in before the press acts again. For safety, the operator is required to push the run button on the press but the discharge and feeding actionsare so rapid that there may be practically no pause in the action of the press.

It is thus seen that the invention provides simple, eificient and quick-acting means for forcibly ejecting workpieces in order that the press may work rapidly and effectively. One workman is eliminated and it is not necessary to reach in and lift out the finished workpiece with the danger and fatigue which were formerly entailed. The serving device is simple and unitary in nature and may be quickly removed by taking out the slide hinge pins and the lower pivot pin of the lift. The air hose lines are readily disconnected in known manner. For simplicity they have been omitted from the drawings as have the electrical connections and the connections with the press controls since these can be readily understood without illustration.

While one embodiment of the invention has been described by Way of illustration it is to be understood that there may be various embodiments within the general scope of the invention.

What is claimed is:

Press serving apparatus comprising in combination with the relatively movable dies of a vertical-axis press,

the slide having a portion :Jshaped to position and hold a workpiece while being operated upon, by the dies and an jopen channel extending away'ffrdm the positionin'g'portionj alongwhich a workpiece can slide out .of the press a lift connected to the free end: of v the slide adjacent the o ut 'of' forming position in the dies and holding 'it on a slope, and ejecting means mounted at the" positioning portion at the free end "of the slide and including anejector the slide is tilted up.

a slide'hing ed at one end awy from the dies to permit the partof the slide at the dies to move up ariddown,

positioningportion foriraising it to lift a workpiece References Cited in the file of this patent UNITED STATES PATENTS Taylor L Jan. 1, Townsend L. Apr. 16, Dinzl -2 May 21, Butterfield Dec. 2, Franz .Q Aug. 19, Rund Dec. 23, Ingersoll" Feb. 2, Weyrnotithet al. Nov. 23, Kay Aug. 13,

' FOREIGN PATENTS Germany June 1,