US1446460A - Shearing machine - Google Patents

Description

Feb. 27, 1923.

H. HERMANI.

SHEARING MACHINE.

FILED SEPT. 16. 1921.

8 SHE'ETSSHEET 1.

Feb. 27, 1923.

H. HERMANI.

SHEARING MACHINE.

FILED SEPT. 16. 1921.

8 SHEETSS HEET 2.

Feb. 27, 1923. I 1,446,460.

H. HERMAN].

SHEARING MACHINE.

F ILED SEPT. 16. 192]. 8 SHEETS-SHEET 3.

'H. HERMANI.

Feb. 27, 1923'.

SHEARING MACHINE.

8 SHEETSSHEET 4.

FILED SEPT. 16. 1921.

SHEARING MACHINE.

FILED SEPT-16; 1921- 8 SHEETSSHEET 5..

' Feb. 27, 1923. 1,446,460.

' H. HERMAN].

SHEARING MACHINE.

FILED SEPT. 16. 1921. 8 SHEETSSHEET 6.

juvenior Feb. 27, 1923.

H. vHERIVIANI- SHEARING MACHINE.

8 SHEETSSHEET 7.

FILED SEPT-16.1921.

M mg 9 am fnrenior Hiemyffermamu a f M Patented 1? ch. 27, llQZd.

HENRY HERMANLOF BALTIMORE, MARYLAND,ASSIG1\TOR T0 run mm .nnconarrivd COMPANY OF BALTmoREpoF BALTIMORE, MARYL a JERSEY.

.. ll A CORPORATION NEW SHEARING MACHINE.

7 Application filed September 16, 1921. Serial no. 50;,175.

To all whom it may concern:

Be it known that I, HENRY HERMANI, a citizen of the United States, and resident of Baltimore, in the county of Baltimore City and State of Maryland, have invented certain new and useful Improvements in Shearing Machines, of which the following is a specification.

My invention relates to machine for trimming sheets or plates (usually of sheet metal), and especially to machines for trimming two adjacent sides of a plate at one setting.

A principal object of the invention is'to provide means for trimming the two adjacent sides of the plate in substantiallyone operation, or by quickly-sequential opera tions in one cycle of the machine, and to produce a sharp and true corner at the intersection of the side cuts. Although lthe invention valuable in any case where it is desired to trim a plate v or sheet in the indicated manner, it has been devised with especial reference to the trimming of thin metal or tin plates, bearing a plurality of lithographed designs, which are subsequently cut apart along parallel lines, and the separate strips or pieces so produced are formed into can bodies, or like artlcles' In this particular case, the

important object is to' remove surplus or uneven margins of the main plate along oneend and side of the large plateand at the same time produce true edges with relation to the individual designs to enable or facilitate the correct separation of these designs by subsequent operations. The performanceofthe two cutting operations in quick sequence, at one setting of the plate, reduces. cost and increases output by avoiding a separate setting of the plate for each -.cutting operation, and usuallyalso the transfer 'of'theplate' from one. shearing machine to another between cuts: I a

Other objects are to provide various improved gage .and stop devices to facilitate the placing of the plates for the double cutting operations, although certain ofv these improvements are valuable in cutting or shearing machines of other types,'and to improve other structural and operative featuresof machines of this. general class.- v The characteristics and advantages of the invention .are further. suiliciently explained in connection with a detail description of the accompanying drawings, which show an exemplifying embodiment of the/invention. After considering this, it fwill be evident to persons skilled in the art that many variations may be made within the principles of the invention, and l contemplate the employment of any structures that are properly within the scope of the appended claims.

lln the drawings:

Fig. 1 is a front elevation of a embodying theinvention.

. Fig. 2 is a view from the right of Fig. 1, partly in elevation and partly in section.

V Fig. 3 is a left-hand elevation of- 4: is a top plan.

machine with some parts broken away, of one of the lower shear blades, the movable blade extension, and operating mechanism. for the movable extension.

Fig. 6 is a perspective detailof the same. Fig. 7 is a detail invertical section of a pair of shear blades,the work stop for that pair, and adjacent mechanism.

Fig. Fig. 7'. e a

Fig. 9 is a-n elevation from the right of Fig. 8. i o

Fig. 10 is a face view of a typical lithographed metal plate, for the trimming of which the machine is, in one form, especially adapted. f t

The work table 1 is supported by end uprights or legs- 2, between which is secured an under-frame comprising bars 3, 4 and 5.

and underframe. In the present embodiment, the driving mechanism comprises the 8 is a top pla detail of the stop of The shear driving mechanism. which may vary greatly, is supported on the legs hill .volves freely onthe shaft. and is provided. I

with clutch mechanism at 8, and a pedalle- 'VeIIi9'l'30ntI0lS the clutch, to connectthe shear blades .operatively with the driving pulley, .as. usual .in shearing machines.

shaft may also be provided with afriction brake 10, also as usual, to prevent overstroke. A gear 11 on the main shaft engages a gear 12 on a, parallel shaft- 13, mounted in hearings on frame. bars 5, and gear12 is connected by an idler gear 16 to another The mamgear 17 on a shaft 18, also mounted in bear-- a ings on frame bars 5. Each of shafts l3 and 18 has, at the end opposite from its gear, a crank-pin 19, and each crank pin is connected by a pitman' 20 to an arm 21,. depending from one of the movable shear bars, in this case the diagonally moving shear bar 22. The main shaft 6 carries a pair of eccentrics 23, which are connected by eccen-.

- trio links 24 to arms 25, depending from the cal table side flanges 30, as sufliciently shown other movable shear bar, in this case, the vertically moving bar 26. By the described mechanism, or other suitable means, theshear bars are reciprocated in a certain sequential relation in each operative cycle of the machine, for reasons explained hereafter, the-relative movement of the bars being controlled by the relative angular positions on their respective shafts of eccentrics 23 and crank pins 19.

Stationary shear blades 27 and 28 are arranged along-two adjacent sides of the table. specifically, in the present embodiment, blade 27 is secured to the rear side of the table, and blade 28 is secured to the lefthand side. The blades may be detachably secured by screws 29, passing through vertiin Figs. '7, and may be supported by. screws 31 passing through lugs '32. An end portion of one of the stationary shear blades overlaps the end of the other blade and the cutting edge of the last named blade is extended'along the end of the first named blade. Specifically, in the present instance, the rear blade 27 overlaps the end of the side blade 28 and the respective cutting edges meet at a-point 33. .One of the stationary blades, specifically,,in the present instance,

= the rear blade 27, is provided with an extension 34' which has substantially the same cross sectional form as the main blade, and this shear blade extension is carried by a substantially upright arm 35 mounted to oscillate on a pin 36 secured in an upright framemember 37. The arm is also desirably provided with" a lug 38 adapted tofit with suitable closeness in an aperture 39 in vertical table side flange 30 adjacent to the end of the main rear shear blade 27 Thebladeextension is normally held in active position, as shown in figs. 5 and 6, by a spring 40 tensioned between a stationary frame point and a rod 41 secured in a. horizontally ofl'set upper portion 42 of arm 35. At the upper shear blade 47 the cuttting edge of which is arranged diagonally as usual 1n shear mechanism. This rear moving shear blade 47 cooperates with the rear stationary blade 27 and a sheet, usually of metal, such as tin plate, being placed on the table for cutting in a manner more fullydescribed hereafter, the lower blade extension 34 is held in active position, as shown in Figs. 5 and 6, by the spring 40, or other suitable means, and the moving blade descends and makes ashearing out along the cutting edge of the stationary blade and its extension, this cut crossing the intersecting line of the stationary side cuttingblade 28. A true cut is thus made all along one edge of the work sheet, the-cut extending across the left hand margin of the sheet beyond the line along which the sheet is to be subsequently cut by the other pair of shear blades, thus insuring a true corner cut of the rear sheet margin without bending or otherwise injuring thesheet adjacent to the point where the other margin cut is to be subsequently made.

The other shear bar 22 is mounted in diagonally arranged guides 48 in anupstanding frame member 49 at'the left of the table, and is reciprocated by'the connectinglinks 20, previously described. This bar carries diagonally moving shear blade 50 which 00-- operates with the stationary side blade28. The cutting edge of blade 50 is also arranged diagonally so as to inake .a shearing .cut. \Vhen the rear-blade descended, as previously described, the side blade was lifted and removed laterally from the path'of the rearblade by reason of its angular motion. After the rear blade retreats vertically the side blade descends angularly and makes a shear ing out along the edge of the stationary side blade 28, this cut passing across thecutting line of the stationary rear blade 27. To permit the cut to be made in this way across the line defined by the cuttting edge of the rear bar and its extension, the extension- 24 is withdrawn at a suitable time previous to the approach of the side cutting blade by any suitable mechanism." In the present embodiment, for this purpose the side shear bar is provided'with a cam piece 51 having a vertical slot and secured to the shear bar by studs 53 "and screws 54 passing through the slot and engaging in the studs,

' so that the .cam piece may be adjusted vertically. The cam p ece carries a rearward pro ection 55 which has a lower straight cam face 56 to engage the cam roller 43.

as previously mentioned. At a proper point in the descending movement of the side shear bar the cam face 56 strikes the roller 43 and rocks the arm 35. on its pin and the arm with the blade extension 34 is with drawn into a recess 57 in the upright frame member 37, out of the path of movement of the diagonally moving blade, and is retained until the diagonally moving blade again retreats upward. In this way the second cut is made straight across the first cutting line, and the two outs produce a plate which is perfectly trimmed along two adjacent sides, with a true angular corner at the intersection ofthe trim lines.

In the broader aspect of the invention any suitable gage or stop devices may be provided to assist in locating a plate on the table in proper cutting position, and evidently the machine may be adapted for various classes of work where it is desired to shear plates along two adjacent sides, with a true corner. The present invention, however, is especially adapted for trimminglithographed metal sheets, and the gage and stop devices provided in the present embodiment of the invention will be described with especial reference to the characteristics of lithographed sheets of a certain class. Such a sheet is shown in F ig. 10, in which the plate S is provided on one side with a 'lithographed design, in this case consisting of a plurality of parallel similar individual designs D, each of these being intended for the production of a can or box body after the individual designs are severed along the lines 2?. To enable the sheet to be properly severed along the lines If in subsequent operations, and to insure the true cutting of the left hand ends of the individual designs or plate sections, the lithographed design desirably includes parallel gage or cutting lines a along one side, which may be designated as the top of the plate, at some distance inward from the edge n, and other parallel gage or cutting lines I) along the left margin at a point somewhat inward from the adjacent edge n. Similar parallel gage lines 0 may in some cases be placed along the bottom of the sheet and similar lines 03 may be placed along the right hand end of the sheet. Any two intersecting pairs of gage lines, such as a and .b are properly located with relation to the individual design divisions t and to the desired left hand ends of the designs, that is to say, the gage lines I),

are spaced a proper distance equal to the length of the individual can blank from the othenenddefinedbythe lines d, and the per and lower edges in'and I whole. design is arranged so that it always comes within the limits ofthe plate, but sincesuccessiveplates areusually of more 4 or less irregular tormpwithimore or less ragged edges, especially the sideedges Wand the entire design has ain'oreo'r'less varylines 'a orj betwe'en the two'g'age lines,v and also the'slde gage'line Forbetween them,

an upper edge and, an adjacent side edge of the plate are in proper relation to the enand subsequent cutting operations may then be properly performed in a convenient and accurate manner. It is evidently desirable in order to eliminate rehandling and speed up production, to perform both of the margin cuts at the same setting of the plate and desirably in one cycle of the cutting mechanism and this is provided for by my invention, as already explained. I

To locate the plates on the table in relation tothe rear cutting blades, stops 61 are provided, consisting of vertical narrow fiat metal strips secured to the rear shear bar in such a way that their-vertical or stop faces are slightly behind the cutting edge of the moving plate. Desirably these stops are adjustable, and, to provide for adjustment and for otherwise conveniently mounting the stops, they are formed as parts of angle strips, the horizontal members 62 of which are provided with slots-63. These horizontal members overlie a flat bar 64 arranged parallel to the shear bar. This bar 64 is provided with longitudinal slots 65, and near its ends it is secured to the shear bar by vertical bolts 66 and nuts 67. Screws 68 provided with lock nuts 69 pass through'the intersecting slots of stop arms 62 and of the horizontal bar 64. By loosening nuts 69 the stops may be moved laterally and also in and out in relation to the shear blade in an obvious way, and secured in adjusted position by tightening the nuts. The stops areadjusted so that when the plate, such as plate S is shoved over the table and the edge m encounters the stops the cut will be made adjacent to the inner gage line wor somewhere between the two lines a.

The other pair of shear blades is provided in the present embodiment with a single gage or stop 70, this being in the present instance carried bya stationary part of the machine, rather than by the moving shear bar, but movably mounted so as to properly cooperate with the moving shear blade. The stop 70 proper consists of a narrow flat vertical strip of metal secured to a horizontal strip 71, which is' carried by a stem 72, and

the stem is located in a hole 73, bored in a slide or head '74 and secured in ad'usted position by a set screw'75. Thesli ephas flanges 7 6 fitting in undercut guide grooves 77 in a guide piece 7 8 secured tov a horizontal bar? 9, the ends of whichare secured tothe u'prightjframe member 48 by screws 80. Frame member 48 has an aperture 81.to,acco'mmodate the stop mechanism. 4 Bar 7 9 has a horizontal slot 82' through which )assesa screw 83 secured to the vertical gui e memher 7 8 and the screw is provided with a nut 84. When the nut is loosened the guide member 78 may bemoved laterally along bar 79 to adjust the stop in a horizontal direction and the adjustment may then be secured by tightening the nut. The stop may be moved in and out horizontallv to position it the required distance back of the cutting edges of the shear blades by loosening screw 75 and moving the stem 72 in or out. The upper end of the stop 70 proper is positioned to be engaged'by the under face of the shear blade or the shear bar in its downward movement, as sufficiently shown in- Fig. 7,

and to be depressed bv the bar so that the stop does not interfere with the cutting movement; and the stop is held up so that whenever the bar is retracted it extends above the 'table level to engage the plate when the latter is positioned, by a spring 87, stretched between a clip 88 secured under nut st and an arm 88" secured to the slide by a screw 89. g i

To further assist in locating the work for cutting and especially in some cases to assist in the initial setting of the stops, for a particular class of work, an adjustable position sion bars 94:, bolted on,

shown in F ig.

ing or gage bar 91 of angle section may be provided. This is adjustably secured on the table surface bybolts 92 passing through parallel T-slot-s 93 in the table, and for the positioning of unusualy large sheets the table may be provided with forward extenand provided with slots 95 in line with the main slots 93. The gage bar 91 also has longitudinal slots 96 in its lower or horizontal web, through which the bolts 92 pass, so that the bar may be adjusted in the direction of its length, as well as forward and back across theface of the table, and may also be arranged diagonally, if necessary. The upstanding web of the bar is desirably provided with adjustable stops or gage devices 97, which have stems passing .through longitudinal slots 98 in the gage web and secured by nuts 99.

A. typical lithographed plate, such as 10, is frequently provided with gage marks a and w located on plate margins outside of the gage lines a, b, c or d. For instance, in the present case the lower margin of the plate has two gage marks to and the left hand margin has one gage mark a. When the gage marks are arranged as shown the stops 61 and 70 areusually positioned in accordance with the positioning of the gage marks and the additional or auxiliary gage bar 91 may be removed from the machine. In some cases, however, the

side gage mark, such as'c, is placed at the opposite end of the sheet, and in'that case the sheet is turned half way around andthe stop is then adjusted opposite the gage mark o, w ich in this case is at the left as the machine is viewed in-Fig. 4;. The gage bar 91 is put in position and the lugs97 are adjusted directly opposite the gage marks w which are then at the further side of the sheet. As each subsequent sheet is put inv position for trimming it is pulled down against the lugs 97 and to the left againstthe stop 70. The foregoing is onl one example of the use of such auxiliary or additional stop or gage device. a Evidently it may be otherwise employed in other classes of work to assist in initially locating the stops or to locate the sheets for cutting.

The invention also includes means for carrying off the trimmed plate margins. catch trough 100 is secured below the side cutting blades in a position to receive the trimmings and in this trough runs the upper stretch of a belt 101 guided by pulleys 102, one of which is driven by a belt 103 running over a pulley 104 on one of the horizontal shafts 18. The upper stretch of belt 101 discharges the trimmed margins from the trough at a convenient point for disposal. A guide plate or deflector 105 is secured to the table beneath the rear shear blades. The trimmings at this point fall on the deflector and are directed to a convenient point clear of the machine.

What I claim is 1. In shearing mechanism for trimming two angularly-meeting sides of a sheet or plate, shearing mechanism for each of said sides constructed and arranged to cut on both sides across tion and produce a clean and true corner cut. l

2. In shearing mechanism for trimming two angularly-meeting sides of a sheet or plate, means for shearing both sides of the plate by successive tWo-and-frooperations in one operative cycle of the mechanism.

3. In shearlng mechanism for trimming two angularly-meeting sides of a sheet or plate, a pair of shear blades for each of said sides, and means for operating both pairs of bladesindependently and successively in one cycle of the machine to trim both sides of the plateat one setting.

1. In a shearing machine for trimming two angularly-meeting edges of a sheet or plate, an independently operable shearing means for each of the sides, each of said means arranged to cut across the point of side-intersection, and means for operating said shearing means inclose suceessionto the point of side-intersecproduce atwo-edge and corner cutat one.

setting ofthe plate.

- 5. In a shearing machine for trimming two angularly-meeting edges of a sheet or plate, an independently operable shearing means for each of the sides, each of said means arranged to cut across the point of side-intersection, and means for operating said shearing means in,close succession in one operative cycle of the machine to produce a two-edge'and corner cut at one setting ofthe plate.

6. In a shearing machine for trimming two angularly-meeting edges of a sheetor plate, two stationary cutter blades undereeeneo lying the respective lines of cut, a movable blade for each stationary blade, each arranged to extend across the edge intersection, and means for operating the movable blades successively and withdrawing one before the advance of the other.

7. In a shearing machine for trimming two angularly-meeting edges of a sheet or plate, two stationary cutter blades underlying the respective lines of cut, a retract able member for one of the stationary blades, extending beyond the cutting line of the other blade, a movable blade for each stationary blade, each arranged to extend across the edge intersection, means for operating the movable blades successively and withdrawing one before the advance of the other, and-means for withdrawing'said retractable member after operation of the corresponding movable blade and before advance of the other movable blade.

8. In a machine of the class described, a table, two stationary shear blades arranged along meeting sides of the table. a retractable shear-abutment extending the cutting edge of one blade across the end of the other, amovable shear blade cooperatin with each stationary blade, each movab e blade being arranged to extend across the intersection of the edge lines of the stationary blades, means foroperating the movable blades successively in One cycle of the machine, and means for retaining the abutment in o erative position for the cutting action 0 its corresponding movable blade and for retracting it during cutting advance of the other movable blade.

9. In a machine of the class described, a table, two stationary shear blades arranged along meeting sidesof the table, a retractable shear-abutment extending the cutting edge of one blade across the end of the other, a movable shearblade cooperating with each stationary blade, each movable blade being arranged to extend across the intersection of the edge lines of the stationary blades, means for operating the movable blades successively in one cycle of the machine, means for retaining the abut-- ment in operative position for the cutting action of its corresponding movable blade, and means acting between the other movable blade and said abutment for withdrawing the latter as the blade approaches cutting position.

10. A shearing machine comprising a work table, a stationary shear blade along one side of the-table, a movable blade extension in line with the fixed blade, a retractable carrier supporting the extension, and means for moving the carrier to and from operative-position.

11. A shearing machine comprising a work table, a stationary shear blade along one side of the table, a movable blade extension in line with the fixed blade, a retractable carrier supporting the extension, means for moving the carrier to and from operative position, and means for locating the carrier and extension definitely in relation to the fixed blade when in operative position.

12. A shearing machine comprising a work table. a stationary shear blade along one side of the table, a movable blade extension in line with the fixed blade, 'a' retractable carrier supporting the extension, means for moving the carrier to and from operative position, and a lug secured to the carrier and arranged to enter a' recess in the table to definitely locate the extension in operative relation to the fixed blade.

13. A shearing machine comprising a' sion, a diagonally moving shear'blade cooperating with the second fixed blade and arranged to cut across the cutting line of the first fixed blade and its extension, and means for moving the movable shear blades in. sequential relation.

14. A shearing machine comprising a work table, a fixed shear blade secured along one side of the table, a movable extension forming a continuation of the fixed blade, a. vertically moving shear blade to cooperate with the fixed blade and extension, a second. fixed shear blade secured along a side of the table and. having its cutting edge intersecting the cutting edge of the first fixed blade, substantially along the joining line of said first fixed blade and its extension, a diagonally'moving shear blade cooperating with. the second fixed blade and arranged to cut across the cutting line of the first fixed blade and its extension, means for moving the movable shear blades in sequential relation, and means for withdrawing the blade ex--v tension prior to the approach of the diagonally moving blade.

15. A' shearing machine comprising a.

'table, afirst fixed blade secured to one side Elli) extension carrier for retracting the blade extension during the cutting vipproach of said second. movable blade.

16. A shearing machine comprising a work table, two pairs of shear blades arranged along two meeting sides of the table, one blade of each pair being movable in a generally vertical direction, drive shafts connected to move the two movable shear blades in relative sequence and a main drivingmember connected to the drive shafts.

17. A shearing machine comprising a work table, two pairs of shear blades arranged along two meeting sides of the table, one blade of each pair being movable in a generally vertical direction, a main drive shaft located below and parallel to one of the movable blades, eccentric and links connecting the main shaft to said blade, other parallel drive shafts connected to the main shaft, and link connections between said other drive shafts and the other movable blade.

18. In a shearing machine, a work table, a fixed shear blade, a movable shear blade,

a stop bar secured at the rear to the movable blade and longitudinally slotted, and one or more work stops carried by the stop bar and provided with slots and locking members intersecting the stop and bar slots to admit of adjustment of each stopv longitudinally and transversely in relation to the shear blade, the stops having stop faces depending below the upper surface of the fixed blade.

19. In a shearing machine, a work table, a fixed shear blade thereon, a movable shear blade, a vertically movable stop carrier, means for retaining the carrier normally in elevated position, a work stop supported by the carrier and arranged to normally project above the level of the fixed blade and to be depressed by downward movement of the movable blade, and means admitting of adjustment of the stop both longitudinally and transversely in relation to the shear blades.

Signed at Baltimore and State of Maryland this 14: day of September A. D. 1921.

HENRY HERMANI.

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