US1534999A - Shearing device - Google Patents

Description

April 2l, l1925.

H. wA'rsoN snmnme DEvIc Filed Dec. 17; 1921 v'4 Sheets-lSheet 2 INVENToR I April 21, 1925. 9 Y 1,534,999

H. C. WATSON SHEARING DEVICE Filed Dec. 17', 1921 Sh''etsshet 3 u lo "D lllll mnu a s,

April 21, 1925.

H. C. WATSON SHEARING DEVICE Filed DeC. 17, 1921 4 SheetSShet 4,

AINVENTOR Patented Apr. 21, 1925.l

UNITEDA STAT- ES PATENT olrlclsz.l

HARRY C. WATSON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO KEYSTONE MACHINE e ENGINEEniNe COMPANY,

PORATION F PENNSYLVANIA.

OF PITTSBURGH, PENNSYLVANIA, A COR- Application led December 17, 1921. Serial No. 523,168.

n J To all whom z may concern.'

Be it known that I, HARRY C. WATSON, .residing at Pittsburgh, Allegheny County, Pennsylvania, have invented a new and useful Improvement in Shearing Devices, of which the following is a full, clear, and eXact description.

` My invention relates broadly to shearing devices, and more particularly to mechanism for shearing hollow articles, especially pipe andtubing.

My invention is particularly useful in 4cutting what is known as crop from lthe ends of pipe. By the use of this invention the crop is cut from the pipe in strip form and',

if desired, may be simultaneously corrugated. This operation is carried out by a simple machine and without the use of a mandrel. By employing my invention the bearingsq for the. shafts carrying the shears may be close enough to the same, to adequately support lthe shears as distinguished from vmachines as heretofore constructed wherein the shafts carrying the shears were extended from the bearings a distance equal to maximum length to be cut from the pipes.

This construction is made possibleby reason of the provision of cutters starting their cut from one edge.

My invention will be better understood upon reference to the following description taken in connection with the accompanying drawings, forming part thereof, and in which: Figure 1 is a side elevationof one form of l machine embodyingmy invention;

Figure 2 .is a plan view of the machine of Figur-e1; l y igure 3v is a section on the line III-+111 ct F1gure22;

Figure 4s an end elevation;

Figure 5 is a detail of construction, and Figure 6 is another detail of constructmn. Referrin -to the drawings, a machine embodying this invention may comprise rotating shears land 2. YThe shear. 1 1s mounted upon a shaft '3, journaled at 4 and 5, and ro-v tated by power gear provided with two universal joints 8 and 9.

5 The section of the shaft upon which the gear,

6 is mounted is journaled at 1() and .1 1f1n a f supportingi frame or casing 12. A-p1n1on13 'is mounteVV 6, through 'a shaft 7,*

on the shaft 3 and 4meshes with'l a pinion 14 on the shaft 15, which shaft carries the shear 2.' The shaft 15 .is journaled at 16 and 17 in a supporting housing 18. Rollers 19 are provided above the shear 2 for holding the pipe in position, each of theserollers 19 being controlled by a set screw 20. When moved to the proper osition, these rollers are securelyI fastene by bolts 21, passing through slots 22, in the supporting means for the rollers.

The shaft 3' is thfreaded at its outer end', and a nut 23 is screwed thereon to hold the shear 1 in place. A set screw 24 bears against thev end of the shaft 3, so as to adjust the longitudinal position of the shaft in order to bringJ the shears in' proper relation to eachother. `The screw 24 passes through a portion 25 of a second supporting housing 48 hereinafter described.

The section of the shaft which carries the power gear 6 also carries a gear 26, which meshes with the gear 27,-on a shaft 28, which is provlded with a clutch 29, as shown in Figure 3. The clutch l29 is arranged to con-v neet the shaft 28 withi a shaft 30, on which 1s mounted a gear 31, shown in detail in Figure 5. The gear 31 meshes with the gear 32, carrying van eccentric in 33, mounted in a bloclr 33, which slides 1n a slot in a rack 34 havlng teeth which mesh with the gear segment 35, for a purpose whichiwill appear later.. The shear shafts 3 and 15, are so mountedl in the supporting housings carried bythe I frame 12 that the axes of said shafts may be changed angularly relative to that of the pipe or other article being sheared. The axes of the shafts 3 and 15 remain parallel #to each other, and the arrangementmf the mounting is such that the shafts 3 and 15 `may be pivotally moved around trunnions 46 projecting in opposite directions'from the housing 48. The axes of the trunnions pass through the shearing point of the shears. The reason Jfor this arrangement will more clearly appear under the description of the operation of the device.

The housing 18in which is journaled the vshaft 15 is supported at onel end on a rod 47 which rests, onthe housing 48. The housing 18 is adjusted by an I'adjusting screw 49 which is screwed througha portion 50 of the housing 48, the end entering into said housing 18 and arranged to support thev same as shown in Figure 3. The upper portion of the screw 49 passesfthrough an arcuate slot/'49 in the frame 12 to allow for the movement of therparts around the trunnions 46. By turning the screw 49 the upper shear 2 may be adjusted vertically relatively to the shear 1, the housing 18 in such cases moving around the rod 47 asv a pivot. The teeth of the gears 14 and 13 are such^as to allow for suchadjustment. Tlie partsof the universal joints 8 and t) are so arranged as to allow for the necessary effective lengthening vof shaft 7 when the parts are moved'around the trunnions 46.

The clutch 29 is operated by a treadle 36, through a clutch rod 37. A

Means may be'provided for corrugating the crop cut from the pipes in order to produce, in effect, a crush test fulfilling inspection requirements regarding the weld in the pipe. l This may be accomplished by corrugating'rolls 38 and 39,'wh1ch mesh with each other, as shown in Figure 4. These corrugating rolls 38 and-'39l are mounted on shafts 40'and 41, respectively.v The shaft 40 is mounted in a movable housing 42 having a pivoted connection 42 at one end nd supported at the otherk end by springs 43. The shaft 41 is driven from shaft 51 which in turn is driven by gears 52, 53 and '54 actuated by power gear 6.' The shaft 40 is driven from agear on the Shaft 51- which meshes with a gear 55 on the endg-of the shaft 40. The' teeth on these gears arelong enough to remain in mesh when the membersy duced into the -machine in the position indicated by the dotted lines 45, Figure 2. At that time, the shear shafts 3V and 15 have been moved around the trunnions 46 to the position shown in Figure 2, so that the longitudinal axis of the pipe is at an angle to the axes of the shear shafts.

The shear 2 operates on the interior of. the pipe and the shear 1 on the exterior. By reason ofv the angular 'relation of' the pipe to the.

shears, the cut is at a corresponding angle to the axis of the pipe, and as the shears are rotated, the pipe is automatically fed into line with the axis of the pipe whereby the end of the pipe may be finished and squared. The crop -is conducted from "the -wherein the shears are at an acute angle to the axis' of the support. i

shears to the cnrrurfating rolls 3S and 39 through the openingzhetween thc sides of thc movable houslng 42, and from there to any desired point. The springs 43 permit the rolls 38 and 39 to separate. sufficiently to -70 allow-the crop to pass between them, but are strong enough to corrugatc the crop. The compression. of the springs may bc changed/by suitable nuts. n My invention has `man advantages, 75,' among which may be mentioned that the shear may be used forl cutting the ipe, without the necessity of mounting the s rear on an extended shaft equal to the length ofthe part of the pipe to be cut oi. The 00 4shear which operates on the interior of the -pi e is carried by a shaft having bearings re atively near the shearing point, so that the shearing strain is easily carried by the' shaft and its supporting members. By real5 son of the strip formation of they crop, crushing of the pipe is avoided. Witha shear, the crystallization of the metal produced by a saw is prevented, as a result of which vthe pipe is not injured by the 9 cutting operation. The use of av shear is` more economical than that of a saw (which has heretofore been the only practicable method used), in that no elaborate safety devices are necessary to protect the workmen fromthe action ofthe saw, and con- Siderable space is saved on that account. It will also be apparent to those skilled in the art thatby the present invention, scrap pifpe, tube and the like may be cut into strip form and the strips used for reinforcingor other purposes, thereby making a salable b -product from scrap material.

Many ot 1er advantages will be ap arent to those skilled in. the art.V `While fhave shown and described one embodiment of my invention in detail, I desire it to be understood that I am not to be limited to the exact -arrangement shown and described, as many chan es may be made in the Vdetails without departing from the spirit of my invention.

I claim:Y v 1. A. pipe cutting machine including an arcuately adjustable shear head having rotary ower driven shears thereon, means for eictlng the arcuate adjustment of said head and for retaining it i-n adjusted position, wherebjT said shears may effectI an angular or directly transverse cutting of a `pipe` irrespective of the axial position of the pipe with respect thereto. Y 2. A pipe cutting apparatus including a 'pipe support, a shearing head arcuately adjustable with respect to the support, power driven shears on the head, and gearing for effecting -alr arcuate movement of the head, said head being adjustable to a position 3. A pipe cutting apparatus including a pipe support, a shearing machine head movable in an arc with respect thereto, rotary shears on the'he-ad, mechanism for rotating the shears, mechanism .for effecting the arcuate movement of said head, and a driving connection between the shear @operating means and the head adjusting mechanism,y

whereby the movement of the head in an arc may be effected synchronously with the rotation of .the shears to insure accurate trimming of the pipe.

4. A pipe cutting apparatus including a pipe support, a shearing machine head movable in an arc with respect thereto, rotary shears on the head, means for adjustingthe rolls in the head, pipe engaging rolls associated with the shears, mechanism for rotating the shears, mechanism for effecting the arcuate movement of said head, and a` driving connection between the shear operating means and the head adjusting mechanism, whereby the movement of the head in an arc may be effected synchronouslywith the rotation of the shears to insure accurate trimming of the pipe.

5. In a machine for cutting pipe, the com-k bination of a shear for operating on the exterior of the pipe, a shear for operating on the interior thereof, a shaft for driving said shears, a iuiiversal joint in said shaft, and means normally holding the shears in adjusted position for moving said shears around a pivot in a vertical line passing through the shearing point, substantially as described.

6. In a machine for cutting pipe, the conibinatiou of' shears, shafts for driving said shears, universal joints in one of said shafts, and means normally holding the shears in adjusted position for changing the cutting' langle of said shears around a pivot in a vertical line passing through the shearing point. substantially as described.

7. In a rotary shearing mechanisln, shear shafts, a shear carried by each of said shafts, a housing in which one of said shafts is journaled, a second housing supporting said first mentioned housing afpivotal connecf l .277 tion between said housings, means for rocking the first mentioned housing about said connection, and means for simultaneously` swinging both of said housings, substantially as described.

In testimony whereof' I have hereunto set my hand.

HARRY o. WATSON.

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