US1588576A

US1588576A - Rivet-slotting machine

Info

Publication number: US1588576A
Application number: US674171A
Authority: US
Inventors: Arthur R Havener
Original assignee: Judson L Thomson Manufacturing Co
Current assignee: Judson L Thomson Manufacturing Co
Priority date: 1923-11-12
Filing date: 1923-11-12
Publication date: 1926-06-15
Anticipated expiration: 1943-06-15

Description

A. R. HAVENER RIVET SLOTTING MACHINE June 15 1926.

Filed Nov. 12. 1925 5 sheetssneet 1 I7 buen/7501.

June l5 1926. .1,588,576

A. R; HAVENER RIVET SLOTTING MACHINE Filed Nov. 12, 1923 5 Sheets-Sheet 2 5 L Www@ 1,588,576 A. R. HAVENER RIVET sLoTTING MACHINE June 15, 1926.

Filed Nov. l2, 1923 5 Sheets-Sheet 3 IHA/ambo?.

fly-' agar vJune 15 1926. f

' A. R.HAVENER RIVET sLoTTING MACHINE Filed Nov. 12, 1925 5 Sheets-Sheet 4 5 Sheets-Sheet 5 Filed NOV. 12, 1923 0 kfw w .Figi/6;

Patented June 15, V1926.

y UNITED STArss ARTHUR R. HAVENER, GF WAYLAND, MASSAHSETTS, .ASSIGNOR T0 JUDSON Il. THOMSON MANUFACTURING CO., OF WALTHAM, MASSAUHUSETTS, A CORPORA- TION 0F MASSACHUSETTS.

RIVET-SLOTTING IACHINE.

Application filed November 12, 1923. Serial No. $214,171.

This invention relates to a machinefor slotting the Shanks of rivets.

rlhe object ofthe invention is to provide a machine which wiil perform the worl; very rapidly as compared with machines which have heretofore been employed for this purose. This result isA attained by feeding a plurality of rivets to a rotary cutter during one rotation of the cutter, the rivets being held firmly in position during the slotting operation and ejecting mechanism being provided which operates a plurality of times to eject a plurality of rivets from the ma.- chine during one rotation of the cutter shaft.

The preferred embodiment of my invention hereinafter described i and claimed, utilizes a plurality .of cutter blades vfast to a rotary member anda rivet fed -intoposition andy held in position for each of the cutter blades respectively, which are fastened tos-aid cutter member. In View of the speed with which the rivets must be fed to the cutter blades, it is necessary,A to feed the rivets successively to a carrier by positively actuated vmechanism instead of depending upon `gravity to perform this function.

In tlie embodiment of my invention here- ,1 inafter disclosed, two cutter .blades are emi, n time will be twice `that of the machine ein-- ployed, and assuming that the cutter shaft lrotates at the same speed as in machines of this class heretofore employed, the number of rivets slotted by the machine in a given ploying a sing'le cutter blade and only feeding one rivet to the cutter blade for one rotation of the cutter shaft.

The invention consists in the combination ,and arrangement of parts set forth in the the :left of Figure 1. 1

Fig. l is a detail front elevation of the mechanism for actuating the rivet driver andholder. Y y y Fig. 5 is a detail front elevation of the mechanismY which actuates therivet carrier.

Fig. 6 is avfront elevation ofthe rivet ejecjting mechanism. y l

l1"ig. 7 is a front eleif'ation, breiten away, and illustrating the cutter blades and the rotary member to which they are fastened.v

Fig. 8 is a sectional elevation taken on line .F ig. 9 is a detail sectional elevation taken on line 9 9, Fig. 1.

Fig. 10r is a detail elevation viewed in the direction of the arrow a, Figure 1, and illustrating the mechanism for feeding the rivets from the raceway tothe carrier.

Fig. 11 is a detail elevation similar to 10,showing the parts in .different relative positions.

Fig. 12 is a side'elevation of a slotted rivet.

llig. 13 is an enlarged front elevation partly in section, illustrating the driver in its lowermost position and a rivet ready tc kbe fed into the rivet carrier and another rivet held. in, position for slotting, with portion of the position.

Fig. lllis an elevation viewed in the direction'of the arrowd, Fig. 13, the work support and ejector' plate being shown in section. y Y

y Fig. 15 is a plan view viewed in the direction of the arrowv c', Fig. 13, illustrating the ejector plate and a portion of thework support. Fig; 16 is a detail cross section ,taken on line lf3-1G, Figure 15.

cutter shown in operative ln practical operation the machine is positioned with the median longitudinal line of the driver at an angle of about 60 toa horizont'al plane, as illustrated in Fig. 13.

Like numerals refer vto like vparts throughout theseveral views ofthe drawings.

lnthedrawings, '15 is the frame ofl the machine, '16 is the cutter shaft which is rotated by a pulley, or other suitable means, not shown in the drawings. Av gear 17 is fastened to the cutter shaft 16 and meshes into another gear 18 fast to a cam shaft .19. The

a nut andcollar '25, see Figs.` 7 andl 8.

l gear y17 havingA twice the pitch Vdiameter of the gearjlS, so that onero-v 'lhe cutter blades 20 and2l The cutting edges 20iand 21 of the cutter blades 2O and 21 respectively are eccentric to the axial line of the cutter shaft 16, and

in the operation of the machine the-cutter asa whole, consisting of the

discs

22 and 23 and the

cutter blades

20 and 21, rotates in the direction of the arrow b, Figf7.

The rivets 26, to be slotted, are fed from a hopper, in a manner well known to those skilled in this art, down a raceway 27 and are fed from the bottom of vthe raceway, one by one, to an auxiliary raceway 28 by a slide 29, there being a slot 8O in said slide to receive the rivet when it is being transferred from the raceway 27 to the'raceway 28.

This construction is old in the art and is fully described in United States Letters Patent Nos. 879,895 and 879,896 to J. E. Perrault, patented February 25, 1908, Machine for etting rivets, to which reference may be had in this connection. Y

The rivets 26 slide one at a time down the raceway 28 until the lowermost rivet 26 engages a driver and holder 31, as illustrated in Figs. 13 and 14.

A reciprocatory motion is imparted to the slide 29 by Vlever 32 pivot-ed at 33 to the frame of the machine and having a rocking' .motion imparted thereto by a spring arm 34,

the free end of which projects through a hole 35 in the arm 36 of said lever 32. VThe spring arm 34 is fastened to a. split block 37 which is clamped by a screw 38 to a rod 39 see Fig. 2. A reciprocatory motion is imr parted to the rod 39 by a cam 40, Figs. 2

and 4 fast to the cam shaft 19 and by a spring` 41, one yend of which is fastened to a pin 42, and the other end to an ear 43 on the hub 44 of an arm 45. The slide 29 slides in ways provided upon the frame of the machine and has rigidly fastened to the front end thereof an arm 46, to the lower end of which is fastened a feed finger 47, see Figs. 10 and 11 13 and V14. The feed finger 47 is positioned to pass above the shank of the vrivet 26 on the raceway 28 when the slide 29 ismoved toward the right, from the position illustrated in Fig. 10 to the position .illustrated in Fig. 11, and by this movement the linger 47 will positively force the rivet 26 on'the raceway 28 against the driver 31 and infso doing` the feed linger 47, which is of thin -flat material and resilient, will be broughtinto tension, so that when the driver 31 moved upwardly, untilthe lower end thereof is above thehead of the rivet 26, the rivet 26 will be immediately forced into a rivet carrier 48, which consists of two side plates 49, each of which is fastened to a fiatV spring and said'fl'at springs are fastened, by means of a bolt 51 and a nut 52 to a carrier slide 53, see Figs. 3 and 5.

A reciprocatory motion is imparted to the lslide 58 by a'cam 54 which is engaged by a cam roll 55 journalled upon an arm 56, see

Figs. 2 and 5, the arm 56 being fast to'a rock shaft 57 journalled upon arbearing 58 on the frame of the machine. The opposite end of the shaft 57 has another arm 59 fast thereto, to the upper end of which is fastened a pin 60 which projects through a slot 61 in one end of a link 62, the other end of` said link being pivotally connected at 63 to carrier-slide 53. A spring 71 is connected Y Aat one end to the pin 60 and at the other end to the pin 63 and normally holds lthe pin 60 in engagement with the left Ahand end of the slot 61, see Fig. 5, while the roll 55 on the arm 56 is held in. engagement with the cam 54 by a spring 72. This mechanism provides yielding means between the cam'54 and the carrier 48, in the event of any ,obstruction to the normal operation of the device occurring. 1

A reciprocatory motion is imparted to the rivet driver and holder 31, Figs. 1 and 4, by a slide73 arranged `to slide in ways provided in the frame of the machine and driven by a linl 74 and arm 75 which isV fastened to a rock shaft 76 journalled in

bearings

77 and 78 in the frame -of the machine. Y

A rockingmotion is imparted to the rock shaft 76 by an arm 79 which is connected by the pin 42 to the rod 39, to which a reciprocatory motion is imparted by the camv 40,

are hereinbefore set forth.

The rivet 26, see Fig. 9, is driven by thedriver and holder 31 out of the rivet carrier Y48 and into a hole 80 in the work support 81. The work support 81 is fast to the frame of the machine and has a ridge 82 extending upwardly therefrom and longitudinally thereof, upon which the head of the rivetl V26 rests, and upon which it is firmly held by the rivet driver and holder 31. V

lVhen the parts are in the positions illustrated in Fig. 9, the rivet is in readinessY The ejector plate 84 is fastened to an armV 86, which is fastened to a rock shaft 87 journalled to rock in a bearing 88 in the frame of the machine and having fastened to its rear end the arm 45, to which motion is imlil) parted by a cam` 88 fast to the cam shaft 19 and engaging a cam roll 89 rotatably mounted upon a pin 90 on the lower end of the arm 45.

The Vgeneral operation of the mechanism hereinbefore specifically described is as follows zi Rivets to be slotted are fed from a hopper, not shown in the drawing, but in a manner well known to those skilled in the art, downy the raceway 27 and are transferred one by one from the bottom of said raceway by the slide 29 to the auxiliary raceway 28. The lowermost rivet 26 in said auxiliary raceway is transferred to the carrier 48 by the feed linger 47, actuated by the arm 46, and slide 29 in a manner hereinbefore described. Said rivet 26 having been transferred to thek carrier 48 is carried downwardly by said 'carrier toward the work support 81 and is then driven by the driver and holder 31 downwardly out of the carrier 48 and into the hole 80 in the work support 81, with its head resting upon the ridge 82 forming a part of said work support. lVhen in this position, the bifurcated portion A85 of the ejector plate 84-projects beneath the head of the rivet 26 and the rivet is held firmly in position by 'the rivet driver and holder 31 and by the slide 73, link 74 and arm 75, it being noted `that when in this4 position the link 74 and arm 7 5, which together form a toggle, are positioned on dead centers. 1

It is very desirable that the driver and holder 31 when feeding the rivet downwardly'` out of the rivet carrier 48 should be actuated by a yielding or spring pressure, but that it should' be held rigidly in position againstl the head of the rivet 26 when the slotting operation is taking place and this is accomplished by the mechanism illustrated particularly in Figs. 2 and 4 wherein it will be noted, as hereinbefore specifically set forth, that the spring 41 acts to rock the

arms

75 and 79 downwardly and the cam 40 acts to rock said arms upwardly so that the slide 73 and driver 31 through the link 74 are moved downwardly with a yielding pressure by means of the spring 41, but the arm 75 and link 74 when in their downward position, as shown in Fig. 4, constitute a toggle with the pivots on dead centers so that the driver and holder 3l when in that; position is positively locked against any upward pressure and the rivet 26 is locked in position while being slotted by the rotary cutter. The driver and holder 31, slide 73,

vlink 74 and the

arms

75 and 79 on their upward movement are positively actuated by the cam 40. The object of this construction is to avoid damage to the different vparts hereinbefore referred to, that is, to the different parts which actuate the driver 80 and holder 31 so that in case a rivet is not in the cutter blades 2O or 21 and after the slotting j f operation has been performed the rivet` driver and holder moves upwardly and the ejector plate 84 is actuated to eject the rivet from the machine and into the tray y83.

Another rivet is now fed and held in position to be slotted, as hereinbefore described, and will be slotted by the other of the two cutter blades 2O or 21 and ejected from the machine, after being slot-ted by the ejector plate v84.

I claim:

l. A `rivet slotting machine having, combination, a rotary cutter, mechanism' to feed a plurality of rivets to said cutter during-a single rotation thereof and means to hold said rivets in-position l'while the cutter during a single rotationsuccessively com" pietes the slotting of the shanks thereof.

2. A rivet slotting machine having, in combination, a rotary cutter, mechanism to positively feed a plurality of rivets to said cutter during single rotation thereof and Vmeans to hold said rivets in position while the cutter during a single rotationfsuccessrvely completes `the slotting of the shanks thereof.

A 'rivet vslo-tting machine having, in

-combinatioin-a rotary cutter, mechanism to feed a rivet to each of said cutter blades respectively during a single rotation of said rotary member, and means tohold said rivets in position while said cutter'blades, during a single rotation of said rotary member,

successively complete the slotting of the shanks thereof.

5. A rivet slotting machine having, in combination, a'rotary cutter shaft, a cutter fast thereto, a cam shaft and cams, mechanism to rot-ate said cam shaft and cams Y gle rotation of said' cutter shaft, mechanism actuated by said cams to teed a rivet to each of said cutter blades respectively during a single rotation of said cutter shaft and means izo actuated by one of said cams to hold said rivets in position successively While said cutter blades are slotting the shanlrsthereof.

7. A rivet slotting machine having, in combination, a rotary cutter, a rivet carrier, a raceway, mechanism to positively feed rivets from sait racevvay on tosaid carrier, a Work support, a driver, and mechanism to move said driver to feed a plurality of rivets successively from said carrier on to said Work support during a single rotation of said .cutter and to successively hold saidy rivets in position Aon saidrivork support While said cutter, during a single rotation thereof, is successively slotting the shanlrso't` a plurality of said rivets.Y

S. A rivet slotting machine having, in combination, a rotary cutter, a rivet carrier, a raceway, mechanism to feed rivets troni said raceway on to said carrier, a Work support, a driver, mechanism to move said driver to successively feed a plurality or rivets from said carrier on to said Work snpport and hold Vsaid rivets in position While said cutter,'during a single rotation thereof, is slotting the shanls ot said rivets, an ejecting lever positioned beneath the head of each rivet during the slotting operation and mechanism to move said ejectin'g lever a plurality of times during one rotation oit said cutter to eject a plurality of rivets from said machine aiter the slottingfoperation has been Ypertormed.

i). A. rivet slotting machine having, l in.V

combination, a rotary cutter, a rivet carrier, a raceivay, mechanism to Vfeed a plurality of rivets successively from said raceWay on to said carrier during a single rotation. of said cnttena Work support, a driver, a slide to Whichsaid driver is faste-ned, mechanism embodyinga toggle joint to impart a plurality olE reciprocatory motions to said slide and driverduring a single rotation ot' said `cutter and reetsaid rivets successively from said carrier on to said Work support and rigidly hold them successively in position While said cutter, during a' single :rotation thereof, is successively Vslottinn' the Shanks of said rivets, and means to eject successively a plurality ot rivets during one rotation of said cutter. Y c Y l0. fr rivet slotting machine having, in

combination, a rotary cutter, a rivet carrier,

a raceivay, mechanism to positively feed a rivet Jfrom'said raceway onto said carrier, a ".verlr support, a driver and mechanism to move said vth'iver to yieldingly feed a rivet `fromV said carrier onto said Work support and positively hold said rivet in position thereon While said cutter is slotti'ng the shank thereof, said rivet-feeding mechanism and driver-actuating mechanism being operable to successively feedand position two rivets to be slotted by said cutter during one rotation thereof. Y f

'ln' testimony whereof have hereunto set my hand, f

ARTHUR n. nAvENER.