US912250A - Chamfering and countersinking machine. - Google Patents

Description

C. F. MESSINGER. GHAMFERING AND COUNTBRSINKING MACHINE.

APPLICATION FILED 91m22.190s.

91 2,250. Patented Feb. 9, 1909.

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A. V" (e www X @w C. E'. MBSSINGER. GHAMFBRING AND GOUNTERSINKING MACHINE.

APPLICATION FILED APB.2Z, 1908.

912,250. Patented Feb. 9, 1909.

5 SHEETS-SHEET 2.

C. P. MESSINGER.

GHAMFERING AND GOUNTERSINKING MACHINE.

APPLIOATION FILED J9129.291999.

91 2,250. Patented Feb, 9, 1999.

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C. F. MESSINGER.

GHAMFERING AND GOUNTERSINKING MACHINE.

APPLICATION FILED APR. 22,1908.

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C. F. MESSINGER.

CHAMPERING AND GOUNTBRSINKING MACHINE.

APPLICATION FILED APR.22,1908.

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UNITED STATES- PATENT OFFICE.

CHARLES l". MESSINGER, Ol'` CHICAGO, ILLINOIS, -ASiSlGN-Olt ,'l() CHICAGO NUT COMPANY, OF

' CHICAGO, ILLINOIS, A .0(`)ltIOltA'llON OF ILLINOIS.

C HAMFERING AND COUNTERSINKING MACHINE.

Specification of Letters Patent.

Patented Feb. 9, 1909.

Application filed Api-i122, 1908. Serial No. 428,513. substituted for application 'lled April 1, 1907, Serial No. 365,307.

To all whom fit may concern:

Bc it known that l, CHARLES F. MESSIN- oER., a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful I'm novcinent in Chainiering and Countersin 'ing Machines, of which the following 1s a specification.

This invention relates generally to machines for cham'feringv and countersinking any object made of relatively soft metal but -for the purpose of description is referred to as a machine for operating upon iin-ts:

The object of the invention is to provide an automatic machine which. will ,take a .blank having a hole therein and countersink one or both ends of' the hole and at the same time chamier oilthe outer corners of the nut or other object which themachine is designed to work.

The invention consists in mechanism for accomplishing the foregoing objects, which can be made with reasonable economy, readily put in place, which is ellicient in operation and is not readily liable to get out of order.

More in detail the invention consists in a novel carrier for feeding the nuts to the chamfering and countersinking tools, combined with an automatic mechanism for stopping the machine so that the dies may not be injured in the event of more than one nut occupying the place of one nut in the feeding mechanism approaching the chanif'ering and countersinking dies, and in novel features and details of construction which will be hereafter more fully described and claimed Fig. 7 is a front detail view oi the suppleA mental `feeding mechanism or chute for feeding nuts down to the main 'feeding plate or disk of the Inachine. Fig. 8 is a detail rear view of a portion of the bed of the machine, `nd a side view of the part lillustrated in F,g. 6.

Fig. 9 is aside view, partially in section, of the parts illustrated in, Fig. 8. Fig. 10 is a detail view taken on line 10-10 l.of Fig. 3. Fig. 11 is aside detail'view of the lower end of the nut chute as seen from the right side of Fig. 7.v Fig. 12 is a front and Fig 13 a side view of the rods attached to the punch press-head which engage the escapements oi" the inclined nut chute. Fig. 14 is a detail plan view of thc supplemental bed of the machine,showing the entrance to the slide or runway by means of which the finished nuts escape from the machine. Fig. 15 is an enlarged detail view o'l" the chamferedand covuntersinking dies. Fig. 16 is a perspective view ol' a nut blank before it has been operated upon by the machine of my invention, while Fig. 17 is the corresponding view of the finished product.

'lhe machine is designed to take a plurality of nut blanks such as are illustrated in Fig. 16, and automatically carry them between 'upper and lower dies, those articularly illustrated in Fig. 15 being designed to chamfer the corners 3() of the nut and countcrsink the upper ends`-31 and also the lower' ends (not shown) of the hole 32 through they nut. In order to carry out this work'it is necessary that the upper die, or more properly die member, 26 mounted in the head 2S and the'corresponding lower die, or more properly -die member, ,27 mounted or formed in the table 29 shall be operated bya powervful machine and that thenut blank shall be accurately fed in between the die members. In order to do this, I provide an ordinary punch. press, which forms no art of the invention proper, the same consisting of a base frame 35 carrying a bed plate 36, from which rises a mainframe 37 in which are mounted suitable guides 34 in which slides a punch head38. This punch head is suspended in the guides upon a suitable connectmgtrod 39 which has its upper end secured tof/an eccenric 4() suitably mounted upon a shaft 41 j'ournaled in the upper portion of the frame 37 at 42 and 43 in the ordinary manner. Rotating the shaftl41 will therefore cause the reciprocation of the head 38 toward and from the bed plate 36. On the shaft 41 is a wheel 45 normally in communication with an eX- ternal source of power by means oiga belt or any other suitable mechanism. Between the shaft 41 and this wheel 45 is av clutch mechanism, of any one of the ordinary types cf construction, the details of which are not necessary, to be shown here, adapted when thrown in to cause the wheel 45 to operate the shaft 41, and whenv thrown out to disconnect said wheel and shaft. When the clutch is thrown in as above described the pin 46 is in the position shown in Fig. 2; when the pin 46 and rod 47 are moved upward a short distance from the position in said iigure the clutch is thrown out. This upward movement or throwing out of the clutch is caused by a sprin not shown, Within the mechanism of the c utch.

ivoted upon a suitable pin or stud 50 projecting from the frame 37 of the press, is a lever 51, having on its forward end an en larged portion 52. Also pivoted on the stud 50 adjacent to this lever is a supplemental lever 49 pivotally connected at 53 to the rod 47. The rear end of the lever 51 is pivotally connected at 54 to the rod 55 which rod is in turn pivotally connected at 56 to one end 57 of a foot lever 58. The enlarged end 52 of lever 51 has connected to it a spring 59, secured at some convenient place as 60 to the frame 37. The lever 51 and supplemental lever 49 are normally locked together by the combined action of dog 142 and spring 59 which will, together with the operation of this part of the device, be hereafter described.

In applying the invention to the punch press just described, there is secured 1n the ower end of the punch head 38 a block 28 heretofore referred to, carrying in its lower end one or more of the u per dies 26 and upon the table 36 I mount y screws 66 su' plemental table 29 above referred to. Illrom this block 28 extends a guide pin 64 adapted to enter a suitable hole 92 in the feed plate 75 to insure the feed plate, to be hereafter described, always being in proper register with the die members.

Pivotally mounted upon ins or studs 67 extending from opposite si es of the block 28 is a U shaped strip or bar 68 adaped to normally hang down in the position of Fig. 8 and partially cover the upper die 26. Extending from one portion of the strip or bar 28 is a pin 70 adapted to enter and travel in a cam track 71 secured to the table 29, the

same being so shaped that as the block 28 ascends it will cause the bar 68 to move in the arc of the -circle u on the pins 67 and thus throw away from the dies 26 and 27 any object which comes in contact with this bar 68, thereby, as will more fully appear hereafter, stri ping from the dies 26 any finished nuts whic tend to stick to them as the dies ascend; in other words, this is an automatic knock out. I do not limit myself to the form of the cam-track 71 here shown. Any controlling mechanism which will operate the knock out bar 68 in the manner described spirit of the invention.

grasso In order to deliver nut blanks or other articles to be worked upon to the dies 26 and 27, I pivotally mount as shown upon the center of the base 29 ahorizontal main feed plate 75. On the outer edge or periphery of this plate 75 are notches 77 adapted to be engaged by a ratchet dog 79 on the end of the ro y80 normally sprin pressed by the spring 81 into contact with t rese notches 77. This dog is, as shown in Figs. 3 and 4, mounted in one arm 82 of a bell crank j ournaled upon a shaft 83. The other bell crank arm 84 is connected with the vertical rod 85 whose opposite end is connected to a crank pin 86 on the shaft 41 heretofore described. Rotation of the shaft 41 rocks the bell crank 82-84 and causes the dog 79 to reciprocate along the peri heryof the disk 75 and in so doing rotate tlib same in a counter clockwise direction as viewed in Fig. 3. In order to be sure that the frictional contact of the dog 79 will not in withdrawing from the notches 77 in the plate 75 partially rotate the disk in a clockwise direction, )I provide a suitable spring catch 88, which locks the plate in position during the retractingmotion of the arm 82.

In the plate 75 just described, I provide three sets of radially arranged holes, 90, 91 and 92, the first two of said holes being for the two upper dies 26, and the holes 92 being adapted to have the directing pin 64 pass through them as heretofore described. The result of this is that when a particular hole 92 is engaged by the pin 64, the two holes 90 and 91 1n the plate adjacent thereto will be in such a ositlon that the dies 26 may pass throu h t em into en agement with the dies 27. provide the ho es 91 and 92 so that a nut blank may be fed into each one of them at a proper point in the revolution of the disk 75 and may then be carried by this disk into engagement with the workingl dies 26 and 27 and after being operated by them, be carried to a point where they may be delivered from the machine. As I have rovided two sets of working dies 26 and 27 1n radial position, it is of course necessary to rovide two adjacent holes 90 and 91 at eac operative position of the machine; but if a larger or smaller number of operating dies were provided on each radius of the plate, a greater or less number of these nut retaining holes would have to be provided. I so space the holes 92 around the circumference of the plate 75, and so proportion the parts controlling the stroke of the crank arm 82 and consequently of the dog 79 heretofore described, that each complete revolution of the shaft 41 which makes a complete reciprocation of the head 38and consequently of the pin 64, will move this plate 75 from one hole 92 to the next durin one such complete reciprocation of the head 38 of the punch press, the plate 75 bein of course at rest during the period of time w rile the dies are acting on nuts inthe plate,` being so locked by in 64.

I deliver t e nut blanks which are to be operated upon by the machine to the plate 75 by means of suitably supported inclined chute 100, .which chute is divided into ytwo separate tracks or assage ways 98 and 99, one adapted to de iver nut blanks to the holes 91 heretofore described, and the other being adapted to deliver nut blanks` to the holes 90 heretofore described. If only one set of these holes were used, only one passageway would be required, and were more than two of such sets of holes placed radially in the plate an additional number of passa e ways in chute 100 would be required.` n each of the passage ways, near its bottom, is pivotally mounted at 101, an escapement dog 102, having a tooth 103 adapted to rest in front of and below the bottom nut 120 in a particular chute passage way, and another tooth 104 adapted to be, as shown in Fig. 7, over the central hole in the next succeeding nut 121. These escapements 102 are held in tlie ositions of Fig. 7 by vsprings 106 and 107, as s own in Fig. 11. Extending from the upper portions of the escapements 102 are projecting arms 110, the arm on each escapement being adapted to be engaged by the angular face 111 on one of the rods 112 which are, as best shown in Figs. 12 and 13, slidably mounted in tubes 114 rigidly connected to the unch head 38. These rods 112 are normal y pressed down by springs 11.6 within the respective tubes, the possible motion of the rods being limited by the screws 117 entering tlie particular rod through the slot 118. The purpose of this spring connection between each rod 112 and its tube 114 is to allow movement of the rod in the event of an imperfect nut being under escapement 102 and preventing the escapements moving when the rodsstrike it. This to prevent breaking of one or both the parts. As a particular rod 112 descends upon its particular escapement dog 102, the face 111 of the rod strikes the arm 110 and rocks the escapement in a counter clockwise direction from the position of Fig. 6, with the result that the bottom nut 120 is released and allowed to pass on down the chute into the adjacent ole in the feed plate 75, while the next succeeding nut 121 is retained temporarily in position in the chute by the tooth 104 entering its center. When the punch block starts to ascend, the rod 112 is withdrawn from the arm 110, thereby allowing the spring to return the esca ement 102 to normal position of Fig. 7. 'lPhis withdraws the tooth 104 from the nut 121 and allows it to fall down against the tooth 103 ready to be delivered to the feed late upon the next descent of the punch blbck and its attached rod 112. It is of course understood in connection with the foregoing that the operator feeds nut blanks into the passage ways of the chute 100 through the hopper 123 and that there is a continuous row o nut blanks extending up each passage way in the chute 100 from the escapements 102. When the nut blanks have thus been fed through the chute 100 into the holes and 91 in the feed plate 7 5, and have assed under the dies 26 and 27 and have geen countersunk and chamfered l.in the manner described, the plate carries them on around the top of the base plate 29 until they come to the opening 125 leading into the delivery chute 126, from which the finished nuts fall into any suitable receptacle. u

In order to insure all finished nuts falling out of the holes in the feed plate 75, I provide a wiper 127, mounted on a suitable supporting arm 128, adjacent to the entrance 125 to chute 126, which wi er has upon it some flexible material which) will enter the assing holes in the plate 75 suiiiciently to dislodge the nuts therein so that they will drop through the opening 125 into the chute 126 in the manner described.

In order to protect the dies 26 and 27 from injury in the event of two nuts bein iled one on top of the other in a common lgao e in the plate 75 passing around the machine and being thus carried to a position where said nuts will both be between said dies, I provide a mechanism whereby such a pile of nuts will automatically stop the machine. A shaft 130 is journaled in a suitable support 131 on the right side of the machine as viewed in Fig. 2. Rigidly secured to this shaft by means of a set screw 133 is a crank arm 134, carrying a bar 135 normally grazing or slightly clearing the plate 75 over the ho es 90 and 91, in which the nut blanks are carried tothe punch dies. This bar 135 is located as shown between the oint of delivery froin the chute 100 and t ese dies 26 and 27, and it is also so located that any nut or other obstruction upon the plate -7 5 above its surface will strike said bar and cause it to move the crank arm 134 and shaft 130 in a counter clockwise direction as viewed in Fig. 1. 130 is another cran larm 137, to which is pivotally connected at 138 one end of a rod 140 whose opposite end is pivotally connected at 141 to a lever 142 pigoted at 143 upon the enlarged portion 52 of tFe lever 51 heretofore described. This lever 142 has some form of a pointed tooth 145 adapted to engage the angular. corner 146 of said supplemental lever 49 so that when the operator depresses foot lever 58 and thus moves the parts to the osition of Fig. 1, this lever 142 normally hollding the sup lemental lever 49 and attached rod 47 in t e position shown; In this position the machine operates continuously as long as the operator holds his foot upon the foot lever. When now with On the o l posite end.' of this shaft the machine thus in continuous o eration, an obstruction, such as a nut blan out of its normal position on the plate 75, attempts to pass under the bar 135, the engagement of the nut blank with that bar rocks the shaft 130 lin a counter clockwise' direction as heretofore described with the result that the lever 137 pulls the rod 140 to the left, as viewed in Fig. 1; whereby the angular corner 145 on the trigger 142 is pulled off from the angular comer 146 on the supplemental lever 49. As soon as thistakes place, the spring (not shown) in the main clutch mechanism controllin T rod 47 immediately lifts the left hand end of the supplemental lever) 49 and attached rod 47 thus, as heretofore described, throwing out the clutch and sto ing the machine, this notwithstanding t e fact that the foot lever is still de ressed by being engaged by the operators oot. The operator now removes his foot from the operating lever thus permittin spring 59 to return said lever to norma positlon. The operator now removes the foreign obstruction from the plate 75 and depresses lever 58 thereby rotating lever 51 1n a` counter clockwise direction, thereby starting the machine. As soon as this de ression has gone far enough to allow the atch 142 to assume its normal position of Fig. 1, the

spring 148 pulls the bar 140 and attached';

parts into this position.

In the complete operation of the entire machine, arts of which have heretofore been described, the operator starts the machine as just described and feeds a plurality of nut blanks into the hopper 123. These blanks slip down the passage ways in the chute 100 a ainst the escapements 102. With repeate descents of the punch press, nuts are fed one by one in the manner described into each pairof holes 9() and 91 in the rotating plate 75. If pro erly so fed, they pass under the bar 135 wit out moving the same. If improperly fed, so that they protrude seriously above the surface of the plate 75, they cause said bar 135 and its attached parts to stop the machine in the manner described. If the nut blanks succeed in passing this bar 135 as they should, they finally reach a position where they are between the punch dies 26 and 27. When the upper dies 26 strike the lower dies 27 the nut blanks are chamfered and countersunk as described, and as the head 28 ascends, carrying the dies 26 away from the nuts the knock out mechanism strips the nuts from the dies, the plate 75 carries them on around under the wiper 1.27 over the hole 12.5, where they drop from the feed plate into chute 126 and thence into any suitable receptacle.

I have described the machine as lboth chamfering and countersinking but manifestly dies to do only one of said operations or to perform some other similar operation may be used without departing from my invention.

In the base plate 29 I make adjacent to the bottom of the chute 100 corrugations or ridges 1,50, acloss the path of travel of the nut blanks in the holes 90 and 91, the same being designed to Vbe engaged by any nut blanks whlch do not fall in flat position in the holes in the plate and thus cause said blanks to turn themselves over to fiat position before reaching the bar 135.

I claim:

1. In a machine of the class described in combination with. two die members and means for bringing them into operative engagement; means for feeding a plurality of objects to be worked upon, one at a time, between the dies and automatic means capable of stop ing the movement of the die members a apted to be engaged and set in motion by an object to be worked upon which is carried by said feeding mechanism but is out of its normal position thereon.

2. In a machine of the class described in combination with two die members and means for bringing them into working enga ement, means or feeding a plurality of objects to be worked one at a time between the die members, a bar adjacent to the feeding mechanism ada ted to be engaged and moved by one of t e objects to be worked upon misplaced upon the feeding means and a out to pass between the two parts of the die and mechanism connecting said bar to the clutch and a clutch controlling the power applied to the machine the whole so arran ed that when said bar is moved as descri ed it cuts off the power from the machine.

3. In a machine of the class described in combination with two die members and means for bringing them into o erative engagement, ower driven means or feeding a plurality o the objects to be worked upon,

one at a time, between the dies, a shaft joui'- 4naled adjacent to the feeding mechanism, a

crank arm extending over said shaft carrying a rod or bar extending over a portion of the feeding mechanism ada ted to be en aged by objects to be worke upon misp aced upon the feeding mechanism, another crank arm securedto said shaft, a connecting rod having one end secured to said second crank arm,l a trigger mechanism having the other end of said'rod pivotally secured thereto and a mechanism for controlling the application of power to the machine normally enga ed by said trigger mechanism in such a way t at power is then supplied to the machine and that when an object misplaced upon the feeding mechanism of the machine strikes said bar and tilts the first mentioned shaft, it re;` leases said trigger mechanism and shuts off the power from the machine.

4. In a machine of the class described in jects to be worked upon combination with two die members and the holes in the plate to turn said objects means for bringing them into operative enover to normal position as and for the purgagement, a feed plate ada ted to carry ob-k poses set forth.

etween the die In witness whereof, I have hereunto submembers, there being holes in said feed late scribed my name in the presence of two Witadapted to register with said die mem ers, nesses.

means for feeding objects to be worked, one into each successive hole in said feed late and means adjacent to the point of said eeding of the ob'ectsto be worked, adapted to engage said objects as they are dropped into CHARLES F. MESSIVNGER.

Witnesses:

DWIGHT B. CHEEVER, C. J. CHms'roFFEL."`

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