US1149737A - Rivet cutting and upsetting machine. - Google Patents

Description

N. DEDRICK.

III-VET CUTTING AND UPSETTING MACHINE.

' APPLICATION FILED NQV. 6.19M.

Patented Aug..10, 1915.

2 SHEETS-SHEET I.

1; wt y M N. DEDRICK.

RIVET CUTTING AND UPSETTING MACHINE.

APPLICATION FILED NOV 6-1914.

Patented Aug. 10, 1915.

2 SHEETS-SHEET 2- Wow/9 IIOLUMBIA PLANOGBAPH c0., WASHINGTON, D. c.

NICHOLAS DEDRIGK, OF MANITOWOG, VVISCONSIZN'.

RIVE'I CUTTING AND UPSETTING MACHINE.

Specification of Letters Patent.

Patented Au 10, 1915.

Application filed. November 6, 1914. Serial No. 870,577.

My invention refers to rlveting mechanism and has for its object to provide a simple, durable and effective rivet cutting and heading mechanism, the construction and arrangement being such that a reciprocative head, on its working stroke, successively effects a clamping engagement of material worked upon carrying a rivet between said head and a fixed anvil. The neXt operation severs the protruding end of the rivet by shear mechanism and the final operation upsets the severed head of said rivet by a blow independent of the movement of said head.

Specific objects of my invention are to provide a two-part reciprocative head comprising a presser member and an independently movable riveting member; to provide a power actuated plunger in connection with the riveting member and means for controlling the same; to provide a cutting shear associated with the presser-foot head member, and means in connection with the riveting head member for controlling said shear; to provide a plunger and a correlated springcontrolled trip hammer for generating the riveting power; to provide a lock and release mechanism for said spring-com trolled trip hammer under control of movement of one of the head members; to provide a yieldable rivet-centering plunger in connection with the presser-foot member, whereby a rivet is more effectually centered under the plunger mechanism; to provide a cushion connection between the presser-foot members and means for positively actuating the riveting member of said head, whereby a cushion effect is'had with relation to the presser-foot member when the latter is seated upon the article being worked upon, which article is seated. upon an anvil; to provide interchangeable cutting blades for the shears, and to provide a double track cam mechanism in connection with the head riveting member for operating the shears, the cam and associated mechanism being so designed with relation to said shears that,

upon the working stroke of the head, the presser-foot is first caused to engage the goods and clamp the same upon a mandrel and, following this movement, the cutting blades of the shears are caused to close upon and sever the rivet to be operated upon, whlch movement is followed by a slight eX- pansion of the cutting blades to permit a clearance for the plunger mechanism that is then brought down by impact of the trip hammer to upset the severed end of said rivet, it being understood that the trip hammer mechanism has been previously loaded by the initial downward travel of the two members comprising the head.

WVith the above and other minor objects in view the invention consists in certain peculiarities of construction and combination of parts as set forth hereinafter with reference to the accompanying drawings and subsequently claimed. I

In the drawings, Figure 1 represents a side elevation of a riveting machine embodying the features of my invention, with parts in section as indicated by line 11 of Fig. 2; Fig. 2, a detailed face view of the head portion of said machine with parts removed and parts in section as indicated by line 22 of Fig. 1; Fig. 3, a detailed crosssection of the riveting machine head, the section being indicated by line 33 of Fig. 1; Fig. at, a detailed cross-section of the head, the section being indicated by line H of Fig. 1 to particularly illustrate a rivet centering or gaging plunger, and Figs. 5, 6 and 7 illustrate enlarged detailed sectional views ofthe working elements of the head showing the positions they assume in the several steps in the operation of cutting and riveting for confining a series of layers.

In the exemplification of my invention shown by the drawings, the same is particularly designedfor usein connection with riveting the metallic binder strips of small articles such as leather pocketbooks, purses or the like, but, it is obvious-that the essential elements of the machine may be em ployed for cutting and riveting in connection with the manufacture of a variety of articles not mentioned.

Referring by characters to the drawings, 1 represents a bed-plate having an anvil 2 projecting upwardly therefrom, the same being provided with a laterally projecting socketed horn 2 that serves as a convenient rest for the articles being operated upon.

Rising from the rear portion of the bed is a neck 3, which neck supports a base 4; having a vertically disposed dovetailed channel at in its face. The channel 4: is provided for the reception of the dovetailed flanges 5 comprising part of a presser-foot member 6 constituting one member of reciprocative head. The companion head element consists of a riveting member 7, the side walls of which are dovetailed for engagement with a correspondingly dovetailed channel 7 that is arranged longitudinally of the presser foot member. Thus it will be seen that the presser-foot member is slidably mounted within the base and the riveting member is correspondingly slidably mounted within the presser-foot member of the head. The upper end of the riveting member is formed with a cap 8, the rear end of which extends through a slot 9 that is formed in the upper end of the resser-foot member 6. A plunger piston 10 projects from the rear end of the cap 8 and is slidably fitted into a dash-pot 10 that is formed in the body of said presser-foot member. Tnterposed between the bottom of the dash-pot and the plunger piston 10 is a cushion spring 10, whereby a cushioning or yielding connection is effected between the head members, clownward movement of the plunger piston being limited by engagement of the cap with the lower face of the presser-foot slot, while movement in the opposite direction of said piston is limited by a key-pin 11 which engages a slot 11 that commumcates with the dashpot chamber. The riveting member is provided with a lever-receiving slot 12 above its cap portion 8 for the reception of the headed end 13 of an actuating lever 14:, which lever is suitably fulcrumed between ears 3 that project upwardly from the neck 3 that forms part of the frame of the machine. The rear end of this actuating lever is connected by a link 14% to a spring-controlled foot treadle, not shown, whereby the actuating lever is controlled. It should be understood, however, that, avhile I have mentioned one means of operating the actuating lever 14, power may be applied to the same in any suitable manner other than that shown, or other means than a lever may be employed for imparting a reciprocating motion to the composite head previously mentioned. The lower end of the presser foot member 6 has secured thereto a stop block 6 which is adapted to engage the rear bottom edge of the base 4:, whereby upward movement of the presser-foot member is limited. Thus the spring-control in connec tion with the foot treadle, not shown, will normally hold the head suspended in the position as illustrated in Fig. 1 of the drawings, in which position the upper portion of the cap 8 extending from the riveting member engages the upper wall of the slot 9 that is formed in the presser foot member 6, whereby the latter is positively held at the terminal of its idle stroke. The riveting member of the head has fixedly secured thereto a barrel 15 having upper and lower thimbles 15, 15, respectively, and slidably mounted in the barrel is a stem 16 having a head 16 that is guided in the bore of said barrel. Surrounding the stem 16 and interposed between the head 16 and the thimble 15 is a coiled spring 17, which coiled spring exerts downward pressure upon the stem, whereby its head is normally held in engagement with the bottom 'thimble 15 of the barrel, the said mechanism constituting a trip hammer. The upper end of the trip hammer stem 16 terminates with a notched nose 16", the notch being adapted to engage a correspondingly notched nose 18 of a trigger 18, the said trigger being fulcrumed between ears 19 that project from the upper end of the presser foot member 6. The trigger is guided at an intermediate point by passing through a slot that is formed in a forwardly projecting lip 8 of the cap 8 of the riveting member 7 and said trigger is also normally held in looking engagement with the nose of the stem 16 by a leaf spring 20 which is secured to the upper end of the aforesaid presser foot member. The trigger is also formed with a cam lug 21, which cam lug is engaged by the lip 8 of the riveting member 7 when said riveting member reaches the approximate end of its working stroke, this portion of the stroke being independent of any movement of the presserfoot member 6 of said head.

A fulcrumed stud 22 extends forwardly from the lower portion of the presser-foot member 6 and mounted upon said stud are oscillatory arms 23 that constitute a rivetcutting shear. The upper ends of the arms are preferably provided with anti-friction rollers 23, which rollers engage double tracked cams in the form of slots 24, the salne being developed from plates 25, which plates are secured by screws 25 to the face of the riveting member 7 as best shown in Fig. 2. The retaining screws, as shown, are preferably passed through elongated openings in the cam-plates, whereby said camplates are capable of slight adjustment and this fine adjustment is determined by manipulating a tapered head master screw 25 and fixed by firmly setting the screws 25 that serve to bind the companion cam-plates, it being understood that said plates may, in some instances, be formed integral with each other, such construction as shown and described in detail being for the purpose of economy in the manufacture.

' The lower short legs of the shear arms 23 are spaced apart and have dovetailed.

grooves 26 therein for the reception of cormars? respondingly dovetailed tongues 26', which tongues project from the rear faces of cutting blades 27 Thus said blades, can be removed for renewal or for sharpening purposes and when fitted in the dovetailed grooves, they are locked by binding screws 27", the said blades being composed of hardened steel.

Asbest shown in the magnified views, Figs. 5 to 'Z inclusive, the lower faces 27 of the blades, in conjunction with the ends of the shear arms, constitute presser feet for engagement with the article to be worked upon, the said presser foot surfaces being slightly crowned upward to a cutting edge, whereby the rivet body A is severed at a point slightly above the material through which the rivet projects for the. purpose of providing suitable metal whereby an upset head may be formed.

The pivot stud 22, which carries-the shear arms, is, as shown, centrally bored for the reception of the shank 28 of a guide. box 28, the shank of said guide box being firmly held by'a screw threaded locking; plug 28" which enters the recessed stud and engages the threaded end of the aforesaid shank.

Reciprocatively mounted within the guideplug 28 and; the barrel thimble 15 is a riveting plunger 29, the bottom end of which, as best shown in Fig. 7, is preferably formed with a concaved rivet heading recess 29. A collar 30 is mounted adjacent to the upper end of theplunger29, and between said collar and the top portion of the box 28 there is interposed a light coiled spring 31 adapted to exert sufiicient pressure to hold the plunger in its receded position of rest with relation to the guide-box 28, which pressure also causes the upper end of said plunger to project within the trip-hammer barrel when the bottom of said barrel is freed from engagement with the head 16. Between the collar 30 and the lower face of the barrel-thimble 15 is interposed a short sectionofbuffer spring 31 In order to facilitate alinement of a rivet A with the spring-controlled riveting plunger 29, I provide a feeler or guide plunger 32, which guide plunger is arranged to have yielding play at a. right angle to the riveting plunger and is; mounted in a sleeve 33 that is carried at the extreme end of the presser-foot member 6. The said sleeve is in screw-threaded union with a. concentrically bored recess 83 that is formed in the extreme end of the foot member, the recess being intersected by transverse slots. 34. These slots are adapted to receive aguide pin 35 that projects from the plunger, whereby the latter is held against rotary movement in its seat. The plunger is normally held forward by a coiled. spring 36 which engages the rear end of the plunger and abuts a screw plug 36 that is in threaded union with the rear end of the bore 33; The forward exposed end of the plunger carries, a rivet guiding head 32 which is formed with a backwardly flared rivet-(1cm tering socket 32".

Referringto the drawings and especially Figs. 5 .to. 7 inclusive, in the operation ofmy invention, for. example, when the metal binders of a pocketbook are to be riveted, the article is seated upon the anvil horn, as best shown in Fig. 1. The. article, in this exempl fication he Operation, s fr ment of a pocketbook comprising an outer leather jacl zet a and an inner pocket strip 7), the edges, of which, are fitted together and seated within an L-shaped binder c. A flat clamping binder c is then seated to the L- shaped' binder and the series of rivets in the form of small nails are then passedthrough apertures in the several elements, as shown, the said rivets being disposed at suitable intervals apart and the frictional engagement ofthe rivets is sufficient to hold them in the position as illustrated in Fig. 1. The crowned head of the rivet, as shown, is seated within the head socket 2 of the anvil horn, which socket is alined with the trip hammer mechanism and plunger and the extreme end; of the rivet element will engage a socket 32 in the yieldable rivetguiding plunger 32'. The operator now manipulates1 the foot treadle mechanism, whereby the actuating lever 14: will cause the reciprocati qehead to move down bodily until the presser-foot faces of the shears abut the material to be operated upon, whereby said material isolamped with rela-, tion to the anvil horn. Thus the presserfootmember 6 of the head has completed its; movement and the actuating lever 14 which engages the riveting member 7 of the head. now causes said riveting member to move downward. independent of the arrested member and, in describing said movement, attention iscalled to the fact that the cushion mechanism embodying the spring 10 will exert a gradual increasing clamping force upon the material. In the initial independent movement of the riveting element of said head, owing to the configuration of the cam. slots 24, the cutting blades of the shears will be brought together, whereby the rivet body will be cut ofi, as shown in Fig 6 ofthe drawings. Further movement ofthe riveting member cams will cause the cutting blades to recede, whereby clearance therebetween is had to permit a riveting operation. This operation takes place at approximately the finish of the working stroke.

In connection with the riveting movement attention is called to the fact that, as the riveting member 7 starts uponv its. independent. travel downward, the trip hammer spindle 16 will be held from further movement by its engagement with the nose of the trigger 18. Hence the barrel carried by the riveting member 4 travels downwardly upon the now fixed stem 16, whereby the coiled spring 17 is compressed or loaded above its normal tension. Thus it will be seen that when the riveting member has approximately completed its working stroke, the lip 8 of said member will engage the cam lug 21 of the trigger, whereby the same is tripped or released from its engagement with the nose of the stem 16 and the compressed spring will now cause the trip hammer to shoot downward, the impact being against the upper exposed end of the plunger 29. Owing to the fact that the plunger spring 31 is of quite delicate tension, the hammer-like power applied to said plunger will cause the same to strike the exposed end of the rivet A a blow sufiicient to upset the same in any desired manner, whereby the metallic binder elements of the intermediate bodies are firmly riveted together and, in this sudden downward movement of the riveting plunger, it will be noticed that its upsetting end will travel through the socket 32 of the rivet guiding plunger head, whereby the latter will recede slightly. The Work is now shifted to aline another rivet under the mechanism and the operation repeated so on throughout in order to cut off and upset the series of rivets, the feeding movement by hand being similar to that used in connection with shoe-operating or stapling machines. With each recovery movement of the head it is obvious that the two elements comprising the latter will lift successively in such manner that the riveting member, which is positively operated, will engage the presser-foot member and bring the parts at rest withrelation to each other to the position shown in Fig. 1 of the drawings, whereby the nose 16 of the trip hammer spindle 16 will again elfect interlocking engagement with the nose of the trigger 18 which has slight rearward yield to permit such engagement.

From the foregoing description it is obvious that for the coiled spring 17, which constitutes a power storage means whereby impact is given to the riveting plunger, other motive force may be employed.

I claim:

1. A rivet-cutting and upsetting mechanism comprising a presser-foot member adapted to come to rest upon the work to be operated upon, a positively actuated riveting member in slidable union therewith, a power-controlled upsetting plunger carried by the riveting member, means associated with the presser-foot member for delaying movement of the spring-controlled plungeras said riveting member advances coincident to the presser-foot member coming to rest,

whereby power is stored for actuating the plunger, means associated with the riveting member for releasing the delayed springcontrolled plunger as said riveting member continues its movement, and a cam-actuated cutting shear afiixed to the presser-foot.

2. A rivet cutting and upsetting mecha nism comprising two members in slidable union constituting a head, a fixed base into which the head is slidably mounted, means for reciprocating the head, an upsetting plunger carried by one of the members, means for imparting a riveting I impact thereto independent of the head reciprocating: means, a shear carried by one of said members, a shear-actuating cam carried by the other member, and means carried by one of the head members for controlling the plunger impact means.

3. A rivet cutting and upsetting machine comprising a presser-foot member adapted to come to rest upon work to be operated upon, a positively actuated riveting member in slidable union therewith, a power-controlled trip hammer carried by the riveting member, a plunger cooperative therewith,

means associated with the presser-foot member for retarding the trip-hammer whereby power 1s stored for imparting movement thereto, means associated with the riveting member for releasing the hammer retarding means, and a cam-actuated cutting shears afiixed to the presser-foot.

4. A rivet cutting and upsetting machine comprising a presser-f0ot member and a riveting member, the said members constituting a head, reciprocative means engageable with the members whereby the riveting member is caused to travel a greater distance than the presser-foot member, a spring-com trolled trip hammer carried by the riveting member, a plunger cooperative therewith, a trigger carried by the presser-foot member engageable with the trip hammer, trigger release means carried by the riveting member, and a cam-actuated cutting shear affixed to the presser-foot member.

5. A rivet cutting and upsetting machine comprising a bed having an anvil extending therefrom, a vertically disposed base mem- 1 her carried by the bed, a presser-foot member in slidable union with the base having a slot adjacent to its upper end, a riveting member in slidable union with the presserfoot member, an actuating lever extending 1 through the presser-foot slot in engagement with the riveting member, a cam-actuated cutting shear carried by said presser-foot member positioned over the anvil, a springcontrolled trip hammer mounted upon the riveting member having a stem provided with a locking nose, a riveting plunger engageable with the trip hammer, a trigger carried by the aforesaid presser foot member for locking engagement with the nose 1 stem of the trip hammer, and releasing means for the trigger carried by the presserfoot member.

(3. A rivet cutting and upsetting machine comprising a presser-foot member and ariveting member in slidable union therewith the said members constituting a head, means for imparting independent movement to the head members, means for cushioning the relative movement of said head members, a shear mechanism carried by the presserfoot member, means for actuating the same extending from the riveting member, a spring-controlled riveting plunger carried by said riveting member, a springcontrolled trip hammer adapted to engage the riveting plunger, means for effecting locking engagement between the trip hammer and presser-foot member, and means for releasing the locking mechanism coincident to independent movement of the riveting head member.

7. A rivet cutting and upsetting machine comprising a presser-foot member and a riveting member in slidable union with each other, means for imparting independent sliding movement to the head members, a. stud extending from the presser-foot member, oscillatory shear arms mounted upon the stud, cutting blades carried by said arms, a double tracked cam-plate carried by the riveting member engageable with the arms whereby movement of the cutting blades is controlled in both directions, a spring-controlled trip hammer, guides therefor affixed to the riveting member, a riveting plunger positioned under the trip hammer, a guide for the riveting plunger associated with the riveting member, a second guide for said plunger associated with the shear-blade stud, a trigger mechanism for effecting locking engagement with the trip hammer, and means for releasing the trigger carried by the aforesaid riveting member.

8. A rivet cutting and upsetting machine comprising a presser-foot member and a riveting member, the said members constituting a head, reciprocative means engageable with the members whereby the riveting member is caused to travel a greater distance than the presser-foot member, a spring-controlled trip hammer carried by the riveting member, a plunger cooperative therewith, a trigger carried by the presserfoot member engageable with the trip hammer, a stud extending from the presser-foot member, a guide-box carried by the stud for the plunger, oscillatory cutting blades mounted upon the stud, and a cam carried by the riveting member for actuating the cutting blades.

In testimony that I claim the foregoing I have hereunto set my hand at Manitowoc in the county of Manitowoc and State of Wisconsin in the presence of two witnesses.

NICHOLAS DEDRICK. Witnesses G. A. NYHAGEN, E. L. PLEUSS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G.

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