US1561803A

US1561803A - Strip-straightening attachment for rotary shears

Info

Publication number: US1561803A
Application number: US520541A
Authority: US
Inventors: Smith Henry Collier
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-12-07
Filing date: 1921-12-07
Publication date: 1925-11-17
Anticipated expiration: 1942-11-17

Description

ov. 17 [561.803 N 1925 H. c. SMITH y STRIP STRAIGHTENING ATTACHMENT FOR ROTARY SHBARS Filed Dec. 7, 1921 2 shans-Sheet 1 INVENTOR. c. M

nnnm

ATTORNEY.

H. C. SMITH &TRIP STRIGHTENING ATTAHIENT FOR ROTARY SHEARS Nov. 17, 1925.

Filed Dec. 7; 1921 2 Sheets-Sheet 2 Q INVENTOR.

x ATTORNEY.

Patented Nov. 17, 1925.

PATENT OEFICE;

HENRY'COLLIER SMITH, OF' ST. IVIARYS; OHIO STRIP.-STRAIGHTENING ATTACHMENT FOB' ROTARY SH'EARS:

Application. filedDecember?, 1921. Serial NO. 520.541)

Be it known that-I, H nNRY CoLLIER SMITH, a citizen of the United: States, and residing at St. li iarys, i in the County" of Au glaize and State of Ohio; have nvented a new and Ihproved Strip-Straightenng;At--

tachment for Rotary Shears; of which :the

following is a specification;

lChis invention relates straightening and flattening strips-cutfrom 'sheets by rotaryshearsr or Cuttet's;` and its object is to=provde=a simple and easily ad justedmechanism which can-be readily: at-' tached to or deta'ehed-from:the: frameof the-2 shears. i r

This invention consists of a pairof ;roll-- ers attached to rotaryentters for: the purpose of lengthening-the outer edge'` of the strip beingsevered from' a sheet ithe inner edge of the sheet* being stretched by means of the cutters inmakingjthe cntand for the further purpose of feeding the rear end of the strip entirely through the cutters.

lt 'further consists in` a pair of 'rollers adapted to engage the-severed-strip and twist it contrary to the eurl` impartedstoit during the shearingoperation in: order `to remove the cnrl and thus flatten.t-he--strip.-

It' also consists inadjustable mountings for thestraightening rollers to provide for varatons n the amount of curl: in thes strips as they leave the: eutters It also consistsin 'anadjustable guide :for one edge of the sheetbeing slitted and of the severed strip in order to straighten the' strip edgewise and to: properly` position it between the twisted rolls.-

It also consists' in the deta1'ls--o-f=construc-- tionillustrated in thecaecomp any ing' drawings and particularly` pointed out: in: the

claims.

In the drawings, Figy lisa sideelevationr of a rotary shear provided with my nove] stral'ghtening. meehanismi F lg 2. isa front 7-7 of Fig. 6.. Fig; 8 is aplan'ofa guide tor'severed strips:

Similar referencecharacters refer to like parts. throughout" the several Views;

Therotary. shear shown in Fig. 1 is of well known design and isequipped with roto means for tary cuttersl and 2 of substantally the same size, mounted on' the substantially' parallelshafts &and 4 respeetivelywhich eX-- tend in opposite directions The sheet 5'to' be slitted ispassedbetweenthese Glitters-'and a strip 6 is'severed therefrom in the usual': manner. In Fig. 4 these cutters are shown 111 operative positonend the' npper conical cutter 1 is shown provided with a-conical extension? while'a eonieal rol'1 8 is m'ounte-d on the-hub 9 of the-eonieal cntter 2.' Rotary Glitters-;ofthis character are nsually ma de with th ir cutting. edges` of'the i same* diameter' in order to reduce frietion andz' heat ing. The feed 170118 isthereforerlarger than the roll 7. A spaeingtwasher 10 ofhard v ta'y cutters froni any ductile material; the 9 inner edge thereof is stret'ehedand:bent by the shearing process, causing the strip 'to become eurved edgewise and' helical in shape: This may beinpart' obviated: by the feed r lls 7'and 8 whichengage the'outer edge of the severed stripandi may stretch it to some extent. In all rotary shears, the; line of shear isseldom at` the planepassin'g through the axes of the cutters, but is usu-..

ally at one side of this plane the distance depending on the lap of the cntters andthe:

thiclnessof thesheetbeing sheared.: Dni ing the outtng, the sheet is fed alongsby the cutters, but when a strip is severed, the

'strip and sheet stop; In the presentbase the rolls 7 and 8 force the' severed strip along beyond 'this common' plane ofthe cutters.

The curve or twist is not usually removed or prevented by the' rolls v7 and 8' and straightening rollers are therefore provided. Brac kets 12 and 13 are secured to the ;traine 14 of the'shear and a bar 15 is carried thereby. A supporting plate ,16 is adjustably' mcnnted on` this bar and'a 'uidebar is carried-by this plate. This guidebar is preferably formed -of anupper member 17, a

lower memberl, a centralmember19"and I hearing platesQO, the last preferably of hard steel. Any desired means may be employedto unite the parts of this guide bar and the supporting plate. The lower member 18 of this guide bar extends forward on the feed side of the cutters and supports [ne sneet being slitted up to the rotary cutters the edge of the sheet being guided by an adjacent plate 20. Beyond the cutters this member 18 is preferably flush With the bottom edge of the plate 20.

Mounted on the guide bar is a base 22 which has a small boss 23 which carries a pin 24 on which a lover 25 is mounted. This lever carries a pin 26 at its inner end on which the twisting or straightening roller 27 is mounted and a pin 28 is journaled in its outer end. A bracket 29 on this -base22 carries a screw 30 which turns in the threaded real' end 31 of this pin 28. By turning the screw 30, the roller 27 is moved up or down.

A plate 32 is attached to the frame 14 and a bar 33 is slidable in a dove-*rail groove 34 therein. An arm 35 carries a screw 36 by means of which this bar is supported. The upper end of this bar carries a pin 37 on which is mounted the lower twisting oi' straightening roller 38 which co-acts with the roller 27 to untwist the strips as they are severed from the sheet l-eunted on this pin 37 is a head 39 which has an arm 40 which has an eye 42 at its enter end in. which the stem 43 is slidable. A wing niit 44 holds this arm against the spring 45 and an eye 46 at the inner end of this stem is mounted on the pin 47 carried by the bar It is evident that the

members

27 and 38 are not necessarily rotatable, as they would accomplish the same purpose if they were rigid, but the friction is greatly reduced by having them irotatable. Neither is it necessary for these rollers to have beveled faces.

Mounted on the head 39 is a guide plate 48 which has a beveled edge toward the cutter- 2 and which can be tipped down to receive the severed strip as it leaves the cutting rolls, this plate having a notch 49 to admit the roller 38. By properly positioning this guide plate and the two rollers 27 and 37, any twists in the severed strips may he entirely eliminated.

The strip as it leaves the cutters and the twisting rollers may have a permanent curve edgewise which may be removed by means of a roller 51 extending through the guide plate 20 and earried by a pin 52 in a slide bloch 53 mounted in the bracket 54, as shown in Fig. 8. A screw 55 mounted in this bracket is connected t-o the block 53 by means of small clips 56, if desired. The roller 51 being adjustable in and out pushes the strip 6 in to a greater or less extent and hends it in its own plane to straighten it. This member 51 may again be non-rotatable, hut in such case the friction would be gi'eater.

The operation of the st raightening meehanisin is apparent froni the foregoing description. By this Construction sheets or strips of any desired material and of any size may be passed through between the cutters and slitted to produce fiat and straight strips of even width. This is par ticularly valuable when long ribbons of duetile metal are to be slitted into narrower ribbons. It is apparent that this sheet guide and strip straightening attachment may be used with any other type of rotary shear and may be adapted to such other types by skilled engineers.

The details and proportions of the several parts of this straightening mechanism may all be changed by those skilled in the art without departing from the spirit of my invention as set forth in the following claims.

I claim 1. In combination with a shear provided with a pair of conical rotary cutters, and conical rolls co-axial with said cutters to grip severed strips between them.

2. In combination with a shear provided with a pair of conical rotary cutters, and conical rolls co-arial with said cutters to grip severed strips between them, one of the rolls being -of greater diameter than the other.

3. In combination with a rotary shear provided with substantially parallel shafts extending in opposite directions and conical rotary cutters on the adjacent ends thei-cof` and conical feed rolls co-aXial with said cutters to grip severed strips between them, one of the rolls being at the enter end of ene cutter and the other at the inner end of the other cutter.

4. In combination with a shear provided with a pair of rotary cutters and shafts therefor a pair of straightening rollers having beveled faces adapted to engage and twist severed strips as they leave the cutters and parallel shafts for said straightening rollers.

5. In combinati on with a shear provided with a pair of rotary cutters, a pair of straightening rollers adapted to engage severed strips after they leave the cutte's, parallel shafts on which the rollers are mounted, the faces of the'rollers being heveled and adapted to twist the strips; and means to adjust the rollers relative to each other.

6. In combination with a shear having rotary cutters, a guide plate t-o receive severed strips, and a pair of straightening rellers adapted to engage the strips as they leave the guide plate and twist them the axes of the straightening rollers being at an angli to the aXes of the rotary cutters.

7. In combination with a shear having rotary cutters, a guide. bar extending at right angles to the aXes of the cutters and adapted to support and guide a sheet 'to the cutters a pair of feed rolls adapted to engage the strips as they are severed by the cutters and a pair of straightening rollers adapted to twist the severed strips. i

8. In combination with a shear having rot-ary cutters, a guide bar extending at right angles to the axes of the cutters, and adapted to support and guide a sheet to the cutters, a pair of feed rolls adapted to engage the strips as they are severed by the cutters, a pair of straightening rollers adapted to twist the severed strips, and an adjustable guide plaate for the strips between the feed rolls and straightening rollers 9. In combination with ;a shear having rotary cutters, a pivotally mounted plate adapted to receive the severed strips from the cutters, means to 'swing the plate, a pair of straightening rollers adapted to engage the stripsas they leave said plate to twist them, and means to move the guide plate toward and from one of said rollers.

10. In combination with a shear having rotary cutters, a pivotally mounted plate adapted to receive the severed strips from the cutters, means to swing the plate, a pair of straightening rollers adapted to engage the strips as they leave said plate to twist them, and means to move the guide plate toward and from one of said rollers, said plate being pivo'ted on the aXis of the lower straightening roller.

11. In combination with a shear having rotary cutters, a pivotally mounted plate adapted to receive the severed strips from the cutters, means to swing the plate, a pair of straightening rollers adapted to engage the strips as they leave said plate to twist them, means to move the guide plate toward and from one of said rollers, a support for the other roller, and means to move the upper roller toward and from the guide plate.

12. In combination with a shear having rotary cutters, a pivo'tally mounted plate adapted to receive the severed strips from the cutters, means to swing the plate, a pair of straightening rollers adapted to engage the strips as they leave said plate to twist them, means to move the guide plate toward and from one of said rollers, a guide bar for the sheets from which the strips are to be severed, a lever mounted on the guide bar and having one of the straightening rollers mounted at one end, and means 'to Swing said roller. r

13. In combination with a shear having rotary cutters, a guide bar extending at right angles to the aXes of the cutters and adapted to support and guide a sheet to the cutters, a pair of feed rolls adapted to engage the strips as they are severed by 'the cutters, a pair of straightening rollers adapted to twist the severed strips, and a guide roller adapted to engage the outer edges of the severed strips.

14. In combination with a shear having rotary cutters, a guide bar extending at right angles to the aXes of the cutters and adapted to support and guide a sheet to the cutters, a pair of feed rolls adapted to engage the strips as they are severed by the cutters, a pair of straightening rollers adapted to twist the severed strips, a guide roller adapted 'to engage the outer edges of the severed strips, and means to adjustably supportthe guide roller.

15. In combination with a shear having rotary cutters, the eombination of a guide bar adapted to support and guide a sheet to be slt'ted, a pair ofrolls co-aXial with the cutters adapted to feed severed strips from the cutters, a guide plate adapted to receive the sev'ered strips, a. pivot on which the plate is mounted, means to move the pivot up and down, means to Swing the plate on the pivot, a straightening roller mounted on 'said pivot, a lever mount'ed 011 the guide bar, a second roller mounted on the lever oppo- 'site the first named roller means'to adjust the lever, the faces of the rollers being `beveled to twist the strips, and a roller movable at right angles to the straightening rollers adapted to engage one edge of 'the sever'ed strip to bend it edgewise.

16. In combination with a. shear provided with rotary cutters to slit a sheet of metal and support it in a predetermined plane, a pair of rotary straightening members having their aXes spaced apart from the aXes of the cutters and adapted to engage 'severed strips in a different plane from that of 'the sheet as said strips leave the cutters.

17 In combination with a shear provided with rotary cutters to slit a sheet of metal and support it in a predetermined plane, a pair of rotary straightening members having their axes spaced apart from the aXes of the cutters and adapted to engage severed strips in a different plane from that of the sheet as said strips leave the cutters and means to adjust said straightening member relative to said first named plane.

18. In eombination with a shear having rotary cutters adapted to produce strips of metal, and an adjus'table member spaced a distance from the cutters adapted to engage two edges of each of the severed strips to straighten them.

19. In a metal cutting shear, the combination of ro'tary cutters for slitting sheets into strips, means to guide the sheets along straight lines and curl removing means operated by the cutters through the medium of the strips which are being cut.

20. A metal cutting shear having rotary cutters for slitting sheets into strips, means to guide the sheets along straight lines and curl removing means and strip straightening means operated by 'the cutters through the medium of the strip which is being flattened and straightened.

HENRY COLLIER SMITH.