US2514554A

US2514554A - Strip feeding apparatus

Info

Publication number: US2514554A
Application number: US4095A
Authority: US
Inventors: Stanley L Nowelsky
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-01-24
Filing date: 1948-01-24
Publication date: 1950-07-11
Anticipated expiration: 1967-07-11

Description

July 11, 1950 s. NOWELSKY STRIP FEEDING APPARATUS 5 Sheets-Sheet 1 Filed Jan. 24, 1948- INVENTOR.

Q ih/ fyy ATTORNEY Julyll, 1950 s. L. NOWELSKY 2,514,554

STRIP FEEDING APPARATUS Filed Jan. 24, 1948 5 Sheets-Sheet 2 h mmn W Hill" IN V EN TOR.

ATTORNEY July 11, 1950 s. 1..- NOWELSKY STRIP FEEDING APPARATUS 5 Sheets-Sheet 3 Filed Jan. 24, 1948 INVENTOR. 5Z ia22@[./V5we% BY ATTORNEY July 11, 1950 s. L. NOWELSKY STRIP FEEDING APPARATUS 5 Sheets-Sheet 4 Filed Jan. 24, 1948 y 1950 s. L. NOWELSKY 2,514,554

STRIP FEEDING APPARATUS Filed Jan. 24, 1948 5 Sheets-Sheet 5 NM NM 1 N V EN TOR. sgzzz L/wwzyg fif/ia A T TORNE Y Patented July 11, 1950 STRIB'FEEDING APPARATUS .StanIeyL. Nowelsky,- Rename J. I

Application January 24, 1 9%8; Serial-No.-4 ,09'5- Thisinvention. relates to; means; for feedingv strip metal stock toa. punchcpressaand; hassmanu advantages over prior art structures for thispurpose. :It'is oneaof t'he objects. of mylpresentirine vention to provide a feeding structureswhich will requireca.minimum..time torsettineup the structure. on ;a press including. the. setting;v for length: ofstrokeior for thickness ofsmaterial,

: Another object is; tOLZDIOS/idG/LEQIEGBQ structure which 1 springcoverthrowsaare. provided: toi-z permit-:certain variations .in-.. the. ;setting .;11p. opera.- tions iwithout. injury to: the; structure- Another object. of 'm-y invention is tit-provide automatic compensation or wear. in .the. feed s'lide'and its-.ztrack. A iurther objectzistoi provid'e-=automatic:brakingroftthe slide and hence prevention ofslippingphtheslide during the lockingcycle and insuretaccurate feeding-at; all times. A further object is; toiprovide zan apparatus which is reversible-in position on its. subsbase. so as to permit. thestock to .be pushed :orpulled through the press.

A still further and important object; isxto provide a stock feeding 'structurefor' punch presses that is simpler and cheaper than those hereto iore proposed.

These and other objects will-J. be'rreadil ywper ceived by: one iamiliar'withsstructuresaof' this kind by reference tov the following specification taken with the annexed:drawingsswherein:

Figure 1 is-a plan viewpf'the structure.

Figure 2 is" a side elevational view: of Figure-1 the parts being shown about'half wayon the forward stroke.

Figure-3 isan end view of Figure-J2 looking from right to leftw-ithoutthe stock.

"Figure 41's an endviewpf-Figure Z-lookin-g from left to rig-ht without the stock.

Figure '5' is a central longitudinal view of 'Fi'g ure 1 but showingin full the control rod and springs carried thereon; the parts being shown about half-'way'on the return-stroke.

Figure 6 isa view of'the line 6- 6" of Figure 2.

Figure 7- -is--=a part-sectional and -elevational viewacross the slide in-front of a modified form of lock means for gripping the stock.

Figure 8 is afragmentary View on the line 8="8 of Figure '7.

In the drawings wherein like numbers refer to correspondingparts, I isa: support plate having holes 2 for fastening ittothe bed plate ofthe press. Fastenedto-the plate-l as by cap screws 3 1s a base member-4 Extending upwardly from opposite sides of the base members l arestandards i andi. Faster-zed at the upper-ends or 1 Claims. (crawl-+2.5 v

' these standardsxbyscrews 59 i's a-shaftflwand ron at) tatably carried on this. shaftv is a lever- Z9. having an arm I 0 adapted: to be connected to a press. operating-.imemberzand" aniarm l.l term-inatinein a :sphericaluendi I2 thatis locatedw betweena pair of collars l3 and I4, each positioned on and-held to ran; operating imember :on rod l 5- in: any sa'tisfactoryimanner asbyxaidowelipin l6. The-double arm. lever .9 is centrally positionedbetween the standards-.5: and (Hay spacing tubular members t8 and: l9 and: provided with a lubricatingmember- 8. :Therod 1'5 also. carries; in a similar mann'er a collar i=1.

The rod lihasone end supported'ina bar-" 20 that is fastened in any satisfactoy'manner to extensioni'l of the standards Eand 6. "The-oppositeen'dof the rod I5 is'supporte'd' by theouter end "22 of-afeedslide- 23. "The end 22 may fastenedto the-feedsl ide or made an integral partthereof. I

"Freelypo'sitioned between the collars Hand [1 ontherod l 5 i's a locking device*24* operativ'ely held in place byspiral' springs 25. and '26 which encircle the rod [I 5 and have their outer ends abutting-against the-stops collars It and IT while their inner endsenfgagexcup' and cone type wa$1 ers'il and 28' that contact with opposite sides or; the iockmember fifths. spring 25' serves: when force is. applied to lever .9 to tilt or rocklo'ckmemher that is pivoted" at. 29'to. opposite upwardly extending sides 23 sozthat, itssomewhat, rounded en'd" 30-will clamp the stock and move; it. forward to the press. When the slide 23, reaches thefull end of its forward stroke as determined by the Iever"'9and the return movement is. started. the. spring lfi'acts on the lock member 24 to tilt it in reverse direction and. causes the end 3&to' be released from. the stock. Coincidenttherewith an eccentric lock3-l' pivotally mounted on a pin-32 carried in. frame members 33., iseaused .byspring. 34....to. move. into locking en agement Withthe stock to prevent. its shiftingbackwardly. The. springBfl is; carried somewhat freely on an adjust.- able. stud 35,.that is carried by a frame member- 36. as will be seen Icy-reference to Figure-5. Slide rails 31. and 38- fastened toparts of the-base member -4 in any" satisfactory manner as hyfcap. screws 39, have at: the stock enteringend-of the structure, members and: M each having zaslot 42 to receive'a locking stud that engages a'clamp. ing washerto hold the members-Mandi I; invadjusted positi0n.= On theinnerends of each member 40 and 4|. is mountedadouble row ballvbesring. Thesef bearings" engage the edges; :o'i: ithe v 3 stock and thereby guide and assist in passing the stock through the apparatus.

Adjacent the members 40 and 4| is a brace rod 45 fastened to the extremities of the slide rails 31 and 38 as by cap screws 46. The slide rails 31 and 38 have inwardly projecting ledges 41 and 4 8 which engage co-operative portions of the slide 23 over fiat bearing surfaces of considerable area.

A very;impojrtant feature of this invention is the use of a'pair of laterally spaced gibs 49 and 50 located in opposite parts of the base member 4 relatively close to the edges thereof so as to be approximately below the sides ;of the slide which carry the feed lock. These gibs are pressed against the bottom of the feed slide by similar springs 5| at opposite ends of the gibs, the tension of the springs is controlled by screws 52. Preferably the gibs 49 and 50 are made of material different from the base of the slide, such' as bronze. These gibs apply to the slidecontinuous and uniform braking-action and provides automatic compensation for wear at the areas 41- and'48 ;and thereby prevents its slipping and insures accurate feeding of the stock at all times. I

The slidehas a centrally located boss 53 which is adapted to engage adjustable stop screws 54 and 55 which are setto co-operate with

springs

25 and, 26 that also act to take up motion of the press armconnected to the arm of lever 9. This means that'the press may be operated with a crank arm instead of a cam which is usually used to provide a dwell while the press punch is going through the stock. The

springs

25 and 26 also provide a safety feature in being able to take care of errors in setting up the apparatus. An adjustable stop 56 is carried by the slide to limit the movement of the feed lock 24 during the return movement of the slide and also to adjust the lock 24 to take care of stocks of different thickness. Lock 3| is likewise-adjust able to'take care of such stocks. l

In Figures 7 and 8 I have shown a modified form of feedlock 51 wherein the stock engaging end is provided with a plurality adjustable set screws 58 which are adapted to engage stock, having a high finish, at points which will be on the scrap and not on the punched out part. A similar construction should be used on the lock corresponding to 3|. Other variations in the details may be utilized without departing from the scope of the appended claims. What I claim is:

1. Stock feeding means for a punch press includmg, a support plate for attachment to the press, a base member fastened to said plate and having spaced guide members fastened thereto, a pair of spaced longitudinally extending gibs carried in the base membena feed slide held in place by said guide members and having a bottom portion resting on said gibs, the slide. having oppositely disposed side parts extending above its bottom portion, a stock gripping campivotally mounted between said slide parts, an operating 'rod supported at opposite ends'of the slide and passing through the upper portion of said cam which is oscillatable thereon, compression springs carried by the rod in fixed position thereon, one on each side of the cam end and engaging it, means operating on the rod adjacent one of said springs and co-operating: therewith for moving the rod to cause the cam to move into stock gripping position, the otherof said springs cooperating withthe rod after the end .of the for- 4 ward movement of the slide to cause the cam to release the stock and means at the stock entering end of the slide for automatically gripping and holding the stock immediately the forward movement of the slide ends.

2. Stock feeding means as set forth in claim 1 further characterized in that said gibs are spring pressed against the bottom of the feed slide.

3. Stock feeding mean as set forth in claim 1 further: characterized inigthat' said gibs are composed of material that is different from that of the slide bottom and. are spring pressed against the bottom of the feed slide.

4. Stock feeding means as set forth in claim 1 further characterized in that automatically acting but adjustable means are associated with said gibs for compensating for wear between them and the slide.

5. Stock feeding means as set forth in claim 1 further characterized in that said means at the stock entering. end of the slide inclues, an adjustable cam lock to function with various thicknesses of stock with oppositely disposed adjustable antifriction bearing rollers for guiding the stock into theslide.

6. A stock feeding'means fora punch press including a feed slidenwith guide members positioned exteriorly and on opposite sides of the slide, the slide having an: upwardly extending end and an operating rod supported in part by said end, a feed cam lock pivoted at its opposite edges to the slide,'said rod passing freely through the upper part of said cam',':spring overthrows carried on said rodqso as to apply pressure to opposite sides'of said'cam, means for actuating the slide by first acting on said'rod adjacent the end of one of said-springs overthrows tocause said cam to move into locking engagement with the stock and thereby move it and the slide forward to the end of its stroke, the other of said springs then acting. on the cam to release it from the stock and an adjustable cam lock at the stock entering end of the slide for gripping and holding thestock ,on the return-movement of the slide.

7. A stock feeding means as set forth in claim 6 further characterized in that means. are provided' for preventing said slide from slipping during the stock locking cycle. e

8. A stock feeding means as setforth in claim 6 further characterizedin that said slide-rests on automatically acting gibs to provide continuous braking action onthe slide. v

9. A stock feeding means for a:punchw press including a feedslide held on opposite sides-between guide members, a single centrally located operating rod carried by the slide at one end, with means for actuating therod, a feed. lock pivoted to opposite sides of the slide but extending upwardly so said rod passes freely therethrough, springs held in operative position on the rod, one on'eachside of the feed lock and engaging it so as tozresiliently apply'to the feed lock, the motion applied totherod, an eccentric look at the stock entering end of the slide for automatically gripping and holding the stock on the return movementof the slide.

10. A stock feed means as set forth in claim 9 further defined in thatone end of each spring engages the feed lock through the medium of a cup and cone type washer, I

,11. A stock feedingapparatus for a punch press including, a base, slide" rails carried by the base on opposite sides thereof with inwardly prol t ne edg i ns derable surfa e ar a and,

directly engaging the slide in vertical and horizontal directions, a feed slide having its edges engaging th inner horizontal and vertical surfaces of said ledges, and also having upwardly extending sides and one end, an operating rod having one end freely carried in said slide end, a frame member for slidably supporting the other end of said rod, a feed lock pivoted to the sides of the slide and having a clearance hole for said rod, springs operatively located on the rod, one on each side of and acting against the lock, resiliently actuated gibs located in the base on opposit sides thereof and acting on the slide preferably under its sides, a spring actuated lock for engaging and holding the stock on the return movement of the slide and anti-friction means at the stock entering end for guiding the stock onto the slide.

12. A stock feeding structure for a punch press including, a base having laterally spaced spring pressed gibs therein, a slide carried by the base and having a bottom portion resting on said gibs, slide rails carried by the base on opposite sides thereof and having ledges extending inwardly over upper surface portions of the bottom of the slideQan operating rod supported at one end by a frame member of the structure while its opposite end is supported by a part of the slide, a feed lock supported by both the slide and the rod, springs operatively located on the rod, one on each side of and acting against the lock and an automatically acting lock for engaging and holding the stock from slipping on the return movement of the slide.

13. A stock feeding means for a punch press including a base member carrying guide members, a feed slide held on its opposite sides between said guide members, a single centrally located operating rod carried at one end by said slide with means for actuating the rod, a. feed cam lock pivoted to opposite parts of the Slide but REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 562,222 Granger June 16, 1896 723,400 MacKenzie Mar. 24, 1903 784,415 McDonald Mar. '7, 1905 1,088,015 Englert Feb. 24, 1914 1,749,505 Pierce Mar. 4, 1930 2,250,530 Hafecost July 29, 1941