US2431869A

US2431869A - Scrap cutter

Info

Publication number: US2431869A
Application number: US681495A
Authority: US
Inventors: Haller John
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-07-05
Filing date: 1946-07-05
Publication date: 1947-12-02
Anticipated expiration: 1964-12-02

Description

J. HALLER SCRAP CUTTER Dec. 2, 1947.

2 Sheets-Sheet 1 Filed July 5, 1946 .HHHHHHHHHHHHTW' IN VEN TOR.

TTYS

J. HALLER "SCRAP CUTTER Dec. 2, 1947.

Filed July 5, 1946 2 Sheets-Sheet 2 IN V EN TOR.

@ma M7454 Patented Dec. 2, 1947 UNITED STATESifPATENT OFFICE SCRAP CUTTER John Haller, Nbrthviue, Mich.

Application July 5, 1946, Serial No. 681,495

10 Claims. l

This invention relates to cutting machines, and I 1 cutting machine which is operable in timed relationship with an adjacent punching or stamping machine or other material working machine, so as to cut the scrap material therefrom into portions of suitable length for easy disposal.

Another object is to provide a scrap cutter operated from the reciprocable ram of a punch press to cut the scrap material into portions of predetermined length.

Another object is to provide a scrap cutter, as set forth in the preceding objects, wherein a lostmotion connection is provided between the scrap cutter and the machine to which it is connec'ed so that only such portion of the motion of the machine is transmitted to the scrap cutter as is necessary for the operation thereof.

Another object is to provide a scrap cutter, as set forth in the preceding objects, wherein the cutting plunger thereof is operably connected to the reciprocable ram of a punch press through an adjustable lost-motion connection which may be varied according to the thickness of the material being cut.

Other objects and advantages of the invention will become apparent during the course of the following description of the accompanying drawings, wherein:

Figure 1 is a fragmentary front elevation of a punch press having a material-feeding device and scrap cutter associated therewith and operable thereby in accordance with the present invention;

Figure 2 is a vertical section along the line 2-2 in Figure 1, showing the scrap cutter of the present invention in front elevation and with the operating bracket of the punch press shown in dotted lines;

Figure 3 is a central vertical section through the scrap cutter of Figure 2, taken along the line 3-3 in Figure 4;

Figure 4 is a rear end elevation of the scrap cutter shown in Figure 2; and

Figure 5 is a top plan view thereof.

Referring to the drawings in detail, Figure 1 shows a scrap cutter, generally designated ID, according to a preferred form of the invention, as connected to a conventional punch press, generally designated II, the latter of which operates a material feeding device, generally designated I2. The details of the punch press I I are conventional and form no part of the present invention, and the material feeding device I2 is disclosed and claimed in my co-pending application, Serial No.

2 576,821, led February 8, 1945, which issued as U. S. Patent No. 2,428,493 on October 7, 1947, for Stock feeding mechanism for punching, stamping, and cutting machines.

For purposes of the present disclosure, it is sufcient to state that the punch press II has a vertically movable plunger I3 reciprocable in guide members I4 attached to the upper portion of the punch press frame `(not shown). Secured to the lower end of the plunger I3 is a ram I5 having a punch unit I6 secured to the lower end thereof. The punch unitv IB is also conventional and may be of any suitable type, depending upon the nature of the workpieces to be punched or stamped. For purposes of illustration, the punch unit I6 is shown as consisting of a base or support I'I to which a pair of spaced punches I 8 and I9 are connected. The punches I8 and I9 cooperate with die portions (not shown) in a conventional die'unit 23; The latter is secured to the bed 2| of the punch press II by any suitable means, as by the bolts 22. The die unit itl is providedwith

material guides

23 and 24 located on opposite sides thereof and configured to guide a strip of material 25 over the vdie unit 2U so as to be properly positioned for subjection to the punching or stamping operations of the punch unit I5.

The material 25'is' preferably in the form of a relatively thin elongated strip or band, such as strip sheet material, and is fed to the punch unit I 6 and die unit 20 by means of the material feeding device I2. The feeding mechanism of the feeding device I2 is operated step-by-step in -respense to the reciprocating motion of the press plunger I3 by means of a bracket 26 secured thereto as at 21 and having a downwardly extending arm 28 operably connecting the plunger I 3 to the material feeding device I2. At its opposite end the bracket 26 hasa second downwardly extending arm 29 having a slotted or recessed portion 30 through which an'operating connection is made to the cutting machine IB in order to operate the latter in .responseto the operation of the plunger I3 ina manner analogous to the operation of the material feeding device I2.

The cutting machine` I0 consists of a base-or bed 3I (Figures Zand 4;) having spaced vertical bores 32 in which are received the lower ends of uprightsor strain rods'33. The base 3l also is provided with oppositely extending bosses 34 forming supporting feet .and having slotsV 35 therein (Figure) for'the reception of bolts or other suitable fasteners 36 by which the cutting machine IU is-secured tothe bed 2l of the punch The bed 3| is provided with a similar recess 45" and threaded bores 46 for the receptiorrofa'..

lower cutting blade 41 with a cuttingedge 48 arranged in shearing relationship witltheeut;

ting blade 40 and secured inither'recessf 45by;

fasteners 49 passing through holes 50 in the cutting blade 41 and threaded into thebores'- The fasteners 49 also pass through holes 5| in a vertically extending and laterally4 bent material guide V522 having an elongated horizontal.. slot .53 aligned with the. cutting-z` edge'f48i1and adapted'to slidably receive theimaterialfstrip 25:(Figureif3).

The upper part of r.thefplaterr31 is rnovidedwvith upwardly'projecting' spaced# ribszor, ears: 54 having' aligned bores55 (Figures) in'whichisimounted a'pivot pin' 561 Theiatterzalsoipasses'through a bore 51 in theprojectingarm '158; ofi aneccentric'member 59 an'dhasits oppositeafaces closely adjacent f the Iinner`V faces. of L the ribs:` orfearsf'54. The upper portionoftheeccentric arm 591s pro'- vided with a`bore'60r'which receives-zandiis'enzgaged by an approximately'fcylindrical 'eccentric 6| mounted upon or formingalportion of '-a shaft 62" (Figures 3andv 4). Th'eshaft" 62` isI journaled at one V:end in1a'fbore163lpa'ssing horizontallyrthrough a top: member-64' having vertical bores 65 receiving thel vreduced diameter: portion 66 'of the uprights-133, therebyprovidingannular:

shoulders |51 l thereon as" seatssfr` the .topzmem'- berz 64. The upper ends of fthevuprightsfz33': are threaded 'as `at to receivefnutsT692`(Figure 4) byfwhich the-top member/64 isrretained in-*postionA upon the uprights'v332` The opposite end"of=-th'el shaft62" is "journaled in`r arbore 10in afface'plate `1| whichwisrsecured by the fasteners 12 to the top member64; the fasteners 12 passingethroughrlioles:13 fin titre/face plate 1| rand threaded intofthreadedlholes l'14 iin the top member 64%(Figuref3)l The -topfme1nlz er 64-is lprovided'with-- a cavi-ty1f15-havingran inner 4 engagement with the opposite sides 95 of an operating arm 98. The latter is provided with a hub 91 having a bore 93 (Figure 3) journaled on the outer surface 99 of the hub 82. Thus, the operating arm 96 is loosely and swingably mounted upon the hub 82 and applies its operating force to the shaft 62 by way of the stop screws 92, thereby forming a lost-motion connection therebetween.v Y

Extending laterallyffrfomftl'e opposite sides 95 of the operating arm 96 areparallel ribs |00 forming with the face |0| of the arm 96 a guide groove |02 for the reception of a rectangular bloc-k |03 slidable therein during adjustment. The arm `96 is providedwith spaced holes |04 for the receptionV4 of'a'V stud |05 (Figure 2) passing through oneoftthe-holesflM. The stud |05 is integral with the block |03 and carries a roller |01 having a/bore |08 therefor. The outer ends |09 and ||0 of the stud |05 aref of reduced diameter and threaded toreceive` nuts': I|| andi ||2.`` respectively these :engaging :washes'l |3'l and l I4 'so 1 as tohold Y the parts nini assembly" and f permit "free rotation of the'roller;|| uponthevstudzlp. The roller |91 l engages the '.slotzori'recess :fin ,the arm 29 off the bracketz26,a sliding!l connection being thus established'therebetween.-

Operation yofthe invention Prior "to the operatinwof thee'scrapcuttin'g 'ma'- chine`|0 of vthis invention'ftlie stopscrews 92 are adjusted in the bosses 90 (Figure :2)jof 'the'stop support 80 Yuntil theswinging ofi the operating arm 96"in responsetowhe'reciprocation of the press plunger I3; bracket26andbrack'et arm 29 providesa sufcient amount'of lostrmotion to impartasuitable length ofistrole to-the platen abutment wall :16'ipara1lel torth'e innerswall 11 .of

theffaceplateil; The-'abutment surfacesfland 11iare spaced apart lat apporximately rthe-sa'me separation as the/thicknessesfofthe reccentrcal and eccentric arm 59 (Figure 3) 1 The topf memberfllfis'lprovidedfwith fa'y horizontally extending boss Av18h`avir`1g :ano-end face 19" against Vwhich the rear surface-80f of-'a stop support' 8| isin contact.,1 The`v stopizsupport 8| iss-provided 'with` a-hub"82 lhealing-ani internal bore tance .toward 'and Aaway"from the cutting blade 41 to accommodate the: thickness." of j the materia125 being work'ed'upon: 1

When these adjustments 'have 'been' made' and the materiali 25 hasV beenthreaded;v through the material .feeding device. 2 Tandlthe guides `23 and 24 of the die unit 20, the punch'pr'ess `is started inoperation. As` thepress plunger; I3 moves downward, the punch.unit t |6 stamps; outl work piec'esfrom the material ,strip.l25}l.and on its return stroke, the plunger 21'4 operates they feeding device. |2to ,advance theimaterialstrip 25-step by step vin the direction rof.`thescrap;.y cutter |0 through itsrconnection witlil.the,`plunger |3,by the bracket 2|./` v v When the :material strip; 25 Jreaches thel ,scrap cutteri0; theoperator-, threads;1 it through the elongated. aperture .53 :inthe material. guide 52 so 'that' it is'vguided .'intof ther space between the cutting edges 4| and 48 of the cuttng b1ades;40 yand-41v(Figure,3). Asthe arm-29 of the bracket 26 reciprocates--in response sto.sthevrecipviocation of the press plunger 3, it engages-land swings the,operatinglf arm .96 `,(lig-iire'fz) by ,reason ofthe engagement of the roller.t|01.inff-theslot: The swinging of the. operatingarrm ccausesfitoto'engagepthe ,rounded endf94e-of the stopl/-screwsr,92, imparting.' this @swinging motionrtoxtheestop,supe port r8|-,

The swinging :ofthestop'support- 8| rotates Ithe eccentric.` shaft 62 aandfieccentric FSI through its connection: .therewith-'by Wayzof the squaredgbore 84and squaredshaft portion853 Thezrotationof the eccentric6| fin theJ-bore=60i4of th'efeccentric arm 59- causeslthe latter tos/move-,downwardly (Figure-4) thereby-movirrgtheplatenY 31andcut;

ter blade 4I downwardly into shearing engagement with the cutting blade 41 and material strip 25 therebetween by reason of the pivotal connection between the eccentric arm 59 and pivot pin 56. This action cuts off the end portion of the material strip 25 into pieces of any desired length, depending upon the feeding rate of the material feeding device I2. After the cutting action has been performed, the cutting blade 40 and platen 3'! move upward in response to the upward motion of the operating arm 96, bracket arm 29, bracket 26 and press plunger I3. The foregoing cycle of operations is repeated indefinitely as long as the material strip 25 is fed into the scrap cutter I0 by the material feeding device I2.

While I have shown and described my invention in detail, it is to be understood that the same is to be limited only by the appended claims, for many changes may be made without departing from the spirit and scope of my invention.

What I claim is:

l. A scrap cutter for connection to and operation by a material-working machine having a reciprocable member, said cutter comprising a frame having a guide structure, a blade carrier movably engaging saidguide structure for guidance thereby, a cutting blade connected to said frame, a cutting blade connected to said blade carrier in shearing relationship with said frame blade, and mechanism interconnecting said carrier and said machine member and responsive to the reciprocation thereof for moving said carrier in timed relationship therewith, said mechanism including a lost-motion connection disposed between said machine member and said carrier whereby to move said carrier a predetermined distance in response to a different distance of motion of said machine member.

2. A scrap cutter for connection to and operation by a material-working machine having a reoiprocable member, said cutter comprising a frame having a guide structure, a blade carrier movably engaging said guide structure, for guidance thereby, a cutting blade connected to said frame, a cutting blade connected to said blade carrier in shearing relationship with said frame blade, and mechanism interconnecting said carrier and said machine member and responsive to the reciprocation thereof for moving said carrier in timed relationship therewith, said mechanism including a lost-motion connection disposed between said machine member and said carrier whereby to move said carrier a predetermined distance in response toa different distance of motion of said machine member, and having an adjusting device adjustably engaging a portion of said lostmotion connection.

3. A scrap cutter for connection to and operation by a material-working machine having a reciprooable member, said cutter comprising a frame having a guide structure, a blade carrier movably engaging said guide structure for guidance thereby, a cutting blade connected to said frame, a material guide disposed adjacent said frame blade for guiding material to said frame blade, a cutting blade connected to said blade carrier in shearing relatio-nship with said frame blade, and mechanism interconnecting said carrier and said machine member and responsive to the reciprocation thereof for moving said carrier in timed relationship therewith, said mechanism including a lost-motion connection disposed between said machine member and said carrier whereby to move said carrier a predetermined distance in response to a dii-ferent distance of motion of said machine member.

4. A scrap cutter for connection to and operation by a material-working machine having a reciprocable member, said cutter comprising a frame having a guide structure, a blade carrier movably engaging said guide structure for guidance thereby, a cutting blade connected to said frame, a material guide disposed adjacent said frame blade for guiding material to said frame blade, a cutting blade connected to said blade carrier in shearing relationship with said frame blade, and mechanism interconnecting said carrier and said machine member and responsive to the reciprocation thereof for moving said carrier in timed relationship therewith, said mechanism including a lost-motion connection disposed between said machine member and said carrier whereby to move said carrier a predetermined distance in response to a different distance of motion of said machine member, and having an adjusting device adjustably engaging a portion of said lost-motion connection.

5. A scrap cutter for connection to and operation by a material-working machine having a reciprocable member, said cutter comprising a frame having a guide structure, a blade carrier movably engaging said guide structure for guidance thereby, a cutting blade connected to said frame, a cutting blade connected to said blade carrier in shearing relationship with said frame blade, a rotary element mounted on said frame, an eccentric device connected to said rotary element, a motion-transmitting element operatively interconnecting said eccentric device and said blade carrier, and motion-converting mechanism operatively connecting said rotary element and said machine member and responsive to the relciprocation thereof for rotating said rotary element.

6. A scrap cutter for connection to and operation by a material-working machine having a reciprocable member, said cutter comprising a frame having a guide structure, a blade carrier movably engaging said guide structure for guidance thereby, a cutting blade connected to said frame, a cutting blade connected 1go said blade carrier in shearing relationship with said frame blade, a rotary eement mounted on said frame, an eccentric device connected to said rotary ele` ment, a motion-transmitting element operatively interconnecting said eccentric device and said blade carrier, and motion-converting mechanism operatively connecting said rotary element and said machine member and responsive to the reciprocation thereof for rotating said rotary element, said motion-converting mechanism including a lost-motion connection disposed between said machine member and said rotary element whereby to move said carrier a predetermined distance in response to a diirerent distance of motion of said machine member.

7. A scrap cutter for connection to and operation by a material-working machine having a reciprocable member, said cutter comprising a frame having a guide structure, a blade carrier movably engaging said guide structure for guidance thereby, a cutting blade connected to said frame, a cutting blade connected to said blade carrier in shearing relationship with said frame blade, a rotary element mounted on said frame, an eccentric device connected to said rotary element, a motion-transmitting element operatively interconnecting said eccentric device and said blade carrier, and motion-converting mechanism v:ingla lost-motion connection disposedbetween,

said 7machine member and said rotary element, -said lost-motion connection including an adjustting-:device adjustably engaging a portion of said lost-motion connection whereby to move said carrier a predetermined distance in response to a f Idiferent distance of `motion of said machine fmember.

8. `A scrap cutter for connection to and operation by a material-working machine having a recipr-ocable member, said cutter comprising va "frame having a guide structure, a ,blade carrier Vmovably engaging said guide structure for guid- --ance thereby, a cutting blade connected to said cframe, a. cutting blade connected to said blade -carrier in shearing relationship with said frame -blade,-a rotary element mounted on said frame, v=an eccentric device connected to said rotary element, a motion-transmitting element operatively interconnecting said eccentric device and said lblade carrier, and motion-converting mechanism operatively connecting said rotary element and ysaid machine member and responsive to the revciprocation thereof' for rotating said rotary element, said motion-converting mechanism including an armfreely swingable about the axis of said rotary element, spaced stops operatively connected to said rotary-element and selectively envgageable with said arm in response to the swinging thereof, and an operation connection disposed between said arm and said machine mem- "ben 9. A scrap cutter for connection to and opera- "tion by a material-Working machine having a revciprocable member, said cutter comprising a frame having a guide structure, a blade carrier Y-movaloly engaging said guide structure for guidance thereby, a cutting blade connected to said `frame, a cutting blade connected to said blade carrier in shearing relationship with said frame blade, a rotary element mounted on said frame, an eccentric device connected to said rotary element, a motion-transmitting element operatively interconnecting said eccentric device and said blade carrier, and motion-converting mechanism operatively connecting said rotary element and -said machine member and responsive to the re- -ciproc,ationthereofiior;rotating-,said rotaryeiement, saidfmotion-converting mechanism Ainclud- :ing an arm freely swingable about thefaxis ;of said rotary-element, spaced stops operatively con- ;nected to said-rotary element'and selectively engageable with saidiarm 'in response to the swinginglthereof, andan operation connection dis- '.posed'between;saidV arm and said machine mem- ,ber, at least'one of said-stops being adjustably movable 'relativelyto'said rotary element for :varying the-point of engagement thereof with saidarm.

. 10. A scrap-cutter-for connection to and operavtion by a material-working machine having a reciprocable member, said cutter comprising :a frame having a guide structure, a blade carrier movably engaging saidguide structure for lguidance thereby,l a cutting yblade connected to said frame, a cutting-'blade connected to said blade carrier in shearing relationship with said frame blade, a rotary element-mounted on said frame, an eccentric device connected* to said rotaryelement, a .motion-transmitting element operatively interconnecting said eccentric device and said blade carrier, and motion-converting mechanism operativey connecting said rotary element and said machine member and responsive to the reciprocation thereof for rotating said rotary element, said motion-converting mechanism including an arm freely swingable about the axis of said rotary element, spaced stops operatively connected to said rotary element and selectively engageable with said arm in response to the swinging thereof, and an operation connection disposed between said arm and said machine member, said operating connection including a projection on said arm and an elongated actuating portion connected to said machine member and slidably engaging said projection.

` JOI-IN' HALLER.

REFERENCES CITED The following references are of recordin the le of this patent:

UNITED STATES PATENTS Number Name Date 1,016,547 Cahill Feb. 6, 1912 1,421,354 VLittell June 27, 1922 1,883,996 Leland Oct. 25, 1932