US2323017A - Machine for setting or driving rivets and the like - Google Patents

Description

June 29, 1943. w. c. DENT I 2,323,017

' MACHINE FOR SETTING 0R DRIVING RIVETS AND THE LIKE Filed July 25, 1941 2 Sheets-Sheet l I In 9) v 45 14 Jun; 29, 1943. Q T 2,323,017

MACHINE FOR SETTING OR DRIVING RIVETS AND THE LIKE Filed July 26; 1941 2 Sheets-Sheet 2 ATTORNEY Patented June 29, 1943 MACHINE FOR SETTING ORDRIVIN G RIVETS AND THE LIKE William Carlyle Dent, Birmingham, England, as-

signor to Baxters '(Bolts, Screws Limited, Birmingham, England l & Rivets) Application July 25, 1941, Serial Na 4 04,016

In Great Britain July 26, 1940- 2 Claims.

This invention relates to machines for setting or driving rivets and the like, being of the kind in which the said rivets or the like are fed in succession to a pocket or holding device for" operation upon by a setting or driving tool, the pocket comprising a pair of jaws carried by angularly-movable members acted upon by a spring tending to close the jaws to grip a rivet between them.

One of the objects of the present invention is to provide improved means for releasing therivet from the pocket at the time of setting the rivet whereby wear of the pocket and plunger is avoided.

Another object is to avoid the formation of a flash or rim around the head of the rivet during the setting operation, especially in the case of countersunk or flush rivets.

According to the invention, the jaws of the pocket are positively opened, prior to the setting operation, by means of the ram or tool acting upon the angularly-movable members carrying said jaws. This positive opening of the pocket obviates the wear upon both plunger and pockets which is occasioned when the tool forces the rivet from the pocket during the setting operation, as is the usual practice. The pocket carrying members may have opposed arms, projections or cam surfaces adapted to be engaged by a, conical part on the ram or tool, whereby the pocket jaws are spread apart prior to the setting operation.

The tool has a lower end of larger diameter than the head of the rivet to be set, to avoid the formation of a flash or rim on the surface of the head, and it contains a spring-pressed plunger which, after the opening of the pocket, engages the rivet prior to the main tool fully descending to set the rivet.

Figure 1 of the accompanying drawings is a side elevation of one form of the invention showing the setting tool and the pocket at the top of their travel, the pocket being in a position to receive a rivet from the chute.

Figure 2 is a similar view when the setting tool is fully lowered. V

Figure 3 is a front elevation with the pocket and tool in the positions represented in Figure 1.

Figure 4 is a plan of the pocket.

Figure 5 is a vertical section through the setting tool, when raised, on a larger scale.

Figure 6 is a vertical section through the setting tool when lowered on to the work, also on a larger scale.

Referring to the drawings, the riveting machine may be of; any general construction, for example, as described in my application Serial No.l402, 3 62. A vertically-sliding ram carries a setting tool; I. arranged to co-opera'te with a stationary an vil- Zupon which the work 3 is placed.

The rivets are fed from a hopper into a chute 4 (Figure 3) which'delivers themone at a time to a pocket or holder 5. This pocket 5 consists of two recessed separable jaw parts, each of half cup'form, adapted to receive and rigidly grip a rivet between their lower ends. These pocket parts are carried by armsfi secured upon the lower ends of vertical shouldered carrier rods or pins 1, which are rotatably mounted to turn, at their, upper. ends,.,within bearing holes in a block 8 secured to the underside of an angleshaped plate 9 and to turn, by their shouldered lower ends, within bearing holes in a crosshead I0 attached to the lower end of a depending part I I of said block 8. Fixed to the pins I are arms I2, I2, the outer ends of which embrace the shank of tool I and which are connected by a spring I3 (Figure 4) that maintains them against said shank and tends to close the pocket parts 5 together so as to grip a rivet between them. The angle-shaped plate 9 constitutes a pocket carrier or slide and is adapted to be raised and lowered, being vertically guided by two rods I4, I5, attached to the plate and slidable in passages I6, I1, in the guide block I8 of the machine frame. One of the rods may be acted upon by a spring (not shown) that tends to raise the pocket, and it is adapted to be acted upon by pedal-operated mechanism, as described in my said application Serial No. 402,362, in order to lower the pocket to take a rivet to the work. Upon the shank of tool I is adjustably fixed a collar 20 having a conical lower end 2| which cooperates with the arms I2 of the pocket carrier to cause the parts of the pocket 5 to separate to release the rivet when the tool descends (Figure 2) and to slightly open the said pocket to receive a fresh rivet from the chute 4 when the pocket rises (Figures 1 and 3). Thus, after the pocket has been lowered to cause a rivet to be partially inserted into the holes of the work components 3, the tool I descends and the conical end 2I of the collar 20 thereon engages the arms I 2, thus spreading them apart and causing the two parts of the pocket 5 to separate and thereby release their grip upon the rivet. As the tool further descends its lower end engages the rivet head and in co-operation With the anvil 2 effects the setting of the rivet lower end with an axial hole (Figures and 6) and fitted therein is a plunger 22 which normally projects (Figure 5) fromthe s'aid'lower I end of the tool, being thrust downwards-bya' spring 23. This plunger 22 engages the rivet head as the pocket parts 5 are 'opened and before the main part I of the tool contacts wlththe rivet, so as to thrust the rivet fully into thehole and hold it firmly in position; "Asthe stool-deer scends further, its main part moves relatively over the stationary plunger 22 until its end,

face is flush with the end of the plunger and in engagement with the rivet (Figure 6) when the inner end ofthe plunger engages a stop 24; so that the plunger and 'mai-ntool act as asolid unit for effecting the actua-l'setting offlthe'rivet;

and as the 'end' of the" main -t6o1-1lis of considerably larger diameter than? the-rivet head, the latter is forced intothe 'countersink'of-the hole with its top face perfectlyflat without anyilash and without any distortion-bf the work, and flush with the top surface'of-the work.-'---"-I'he't00l and plunger, however, may be shaped to forma head of a domed'or othergshape; 4 Iclaimz, v

1. A machine 'for-clriving"or-setting rivets 0r the like comprising a driving or setting toolprovided with a downwardly-presented conical part, a vertically-movable pocket carrier, a pocket for holding a rivet consisting of spring-pressed jaws, and angularly-movable members carrying the pocket jaws and mounted on the pocket carrier, the conical part of the tool co-operating with the angularly-movable members when the tool and pocket are raised in order to cause the pocket to open slightly to receive a rivet and also acting on said angularly-movable members when the tool descends and the pocket has been lowered, in order to open the pocket and release the rivet thereinprior to the tool engaging the rivet.

- 2. A machine for driving or setting rivets and the like comprising a driving or setting tool provided with a downwardly-presented conical part locatedon its shank at a point above the 0perative lower end'of the tool; a fixed frame, a slide member vertically guided in said frame; a bracket depending from the slide; a pair of spaced vertical rods rotatably mounted in the depending bracket; a pair of arms extending from the" lower ends of the respective vertical rods; opposed pocket jaws carried by the outer ends of the arms, being adapted to receive and hold, a rivet or the like between them; a pair of spaced upper horizontal arms attached to the vertical rods and embracing the tool shank, being adapted to be engaged and spread apart by the cone, when the tool descends and the pocket Vjaws have been lowered, in order to open said jaws and release the rivet therein prior to the tool engaging the work; and a spring acting on the upper horizontal arms and tending to close them about the tool shank. r

i WILLIAM CARLYLEv DENT.

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