US724010A - Shearing-machine. - Google Patents

Description

PATENTED MAR. 31, '1903. S. V. HUBER.

SHBARING MACHINE. y APPLICATION FILED APB. 29, 1902,

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MTENTED MAR.'31,'1903. s. v. HUBER.

SHBARING MACHINE. APPLIOATION FILED AP-RZQ, 1902.

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@www PATENTED MAR. 31, 1903. S. V.'HUB'ER.

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P'ATENTED MAR. 31, 1903.

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SHEARING MACHINE. APPLICATION PI-LED APR. 29, 190.2.

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Sv. V. HUBER. SHEARING MACHINE.

APPLIoATIoN FILED APR. 29. 1902.

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SHBARING MACHINE.

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UNITED STATl-is `ATENT FFICE.

` i sIGMUND v; nuln'aotj` rf'rrsBURc., PENNSYLVANIA.

S'HARWGI'MAHINE.

SPECIFICATION forming part of :ne/refe Patent No. 724,010, dated March 31, 1903.

Y pplication filed vApril 29. 1902. Serial No. 105,146. (No model.)

.To ail whom, it may concern:

Be it known that I, SIGMUND V. HUBER, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania; have invented or discovered certain new and useful Improvements in Sheariu g Mechanism of which improvemen ts the following is a specification. The invention describedjherein relates to certain improvements in shear mechanism designed especially for cutting large sections.

Downcut shears, while presenting comparatively few difficulties to their-manufacture, are objectionable in use, for the reason that the feed-tables whereby the article is transferred to the shear must be so arranged that the upper edge of the lower shear-blade is below a plane tangential to the upper surfaces of the feed-rolls' in order that the article maybe fed over such shear-blade. When the upper blade descends in such a form of shear mechanism, the article must be forced down onto the lower blade, and in so doing it is bent or distorted over the feed-roller. Upcut shear mechanisms have been constructed with stationary upper shear-blocks, which must be arranged a distance above the feed mechanism a little greaterV than the thickest piece to be cut. Hencein cutting their sections the article would be Vlifted from the feed-table by the upward movement of the lower shear-block, and if'the article is hot a bending or distortion thereof will occur.

The invention described herein relates to certain improvements in shearing apparatus, including the shearing and feeding elements, wherein provision is made by the adjustment of one of said elements to prevent any distorting or bending movement being imparted to the article operated on4 during the shearing operation, and hence no bending or distortion of the article is liable to occur.

In general terms the invention consists in the vconstruction land combination of parts substantially hereinafter morevfully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a front elevation of my improved shear mechanism. Fig. 2 is a section elevation on a plane indicated by the line II II, Fig. 1. Fig. 3 is a section elevation on a plane indicated by the line III III, Fig. 2. Fig. 4 is a horizontal section on a planeindicated bythe line IV IV, Fig. 1. Fig. 5 is a similar view on a plane indicated by the line V V, Fig. l; and Fig. 6 is a sectional detail lview through the upper shear cross-head and presser-block. Fig. '7 is a sectional elevation illustrating a construction wherein the shearing mechanism is made adjustable relative to the feed-table.l

Fig. 8 is a sectional elevation of the construction shown in Fig.-7, the plane of section being indicated by the line VIII VIII, Fig. 7; and Fig. 9 is a View, partly in section and partly in elevation, illustrating a further modification of my improvement.

`In the construction shown .in Figs. 1 to 6, inclusive,` the shear mechanism consists of a bed-plate 1, to which are secured vertical posts or uprights 2. On the upper ends of these uprights is secured a head-block 3, having formed thereon a ram 4 for the fluid-pressure cylinder formed in a cross-head 6, having its ends connected by rods 7 to the ends of the lower cross-head 8, carrying the shearblade 9. The ends of this lower cross-head 8 are arranged within suitable guideways formed in the inner faces of the posts or standards 2. When 'water is admitted into the chamber in the piston 4, the pressure is exerted against the upper or closed end of the cylinder 5 in the cross-head 6, forcing the latter upward, and with it the cross-head 8 and shear-blade 9. The upper or shear blade"10 is secured to a block or cross-head l1, having its ends arranged in the guides in the posts or standards 2. This cross-head is supported vertically by means of fluid-pressure cylinders 12, in which a constant pressure is maintained. A suitablemeans for connecting the cross-head 11 with the rams or pistons 13 of the cylinders 12 consists of heads 14, carried: by the upper ends of the pistonsl and having their ends connected, by means of rods '15,: to bars 16, pivotally connected to the .cross-.head l1, as clearly shown in Figs. 1 and 2. These cylinders are so proportioned and the pressure so regulated as to iirmly support or hold the cross-head l1 against the adj listing-screws 17, screwing through nuts 18 in the block 3 and having worm-wheels 19 so keyed to the stems of the screws that the latter will rotate with the worm-wheels, but move freely 1on- IOO gitudinally through the same. These Wormwheels 19 are rotated by means of worms 20, formed on shafts 21, provided at their outer ends with beveled pinions intermeshing with corresponding pinions on the shaft 22, which can be rotated by hand or any suitable form or construction of motor. By the rotation of this shaft the cross-head 11 can be forced down or permitted to rise through the operation of the Huid-pressure cylinders 12 as re- .quired by the thickness of the cross-section `presser-block is held in its lowered position,

but with freedom to rise as it is forced up by the article being sheared, by means of a rod 24E, passing up through the block- 3 and having its upper end exposed to the pressure of fluid within the piston 4, so that the presserblock will always be yieldingly held in contact with the article during the shearing operation. In order to prevent the presserblock from dropping out of the guides, lugs 26 are so formed on the cross-head 11 as to engage when the presser-block is in its lowered position shoulders 27 on the inner face of the presser-block, as shown in Figs. 2, 5, and 6.

In lieu of the construction shown in Figs. 1 to 6, wherein the upper or relatively stationary shear-blade is made adjustable with reference to the feed-table, the entire shear mechanism may be made adjustable with reference to the feed-table or supporting device, or the feed-table or article-supporting device may be made adjustable with reference to the upper or stationary shear-blade. A desirable construction embodying the modification wherein the whole shear mechanism is made adjustable is shown in Figs. 7 and 8 and consists of a carrying-block 28, supportcd by posts or pillars 29 through the medium of nuts 30, arranged within slots or recesses in the carrying-block and engaging threads on the posts or pillars. The peritneters of the nuts are made in the form of worm-wheels and are adapted to be rotated by worms on shafts 31, which in turn are rotated through suitably -interposed gearing by a suitable power mechanism, as'the motor 32, mounted on the carrying-block. The posts or pillars are secured to foundation-blocks 33, which are provided with guide-grooves for the reception of wings on the lower or movable cross-head S, carrying shear-blade 9a. The cross-head or lower shear-block 8a' is connected by rods 7 to the cross-head 6, provided with a ram 4, adapted to operate in the cylinder formed in the carrying-block 28. The blocks 33 are preferably formed integral with a connecting-web 34, which serves as a support for the lower cross-head S when in r its lowest position.

In the constructions shown in Figs. 1 to 3 the feed mechanism or other support and the shearing mechanism are so constructed and arranged that the edge of the lower shearblade will be normally below the plane of the feed or supporting mechanism, so that the article to be sheared will pass easily over such blade. When the upper shear-block is adjusted up or down according to the thickness of the article to be sheared, the lower crosshead or shear-block 8 will not be shifted, as the ram Lis free to change its position in its cylinder. Hence the length of stroke of the lower shear-block will vary in accordance with the thickness of the article to be sheared, thereby effecting a considerable saving of time and operating iuid.

As before stated, the support or mechanism for feeding the article may be made adjustable relative to the upper shear-blade. A convenient construction to this end is shown in Fig. 9 and consists ot' a frame 35, provided with bearings for the feed-rollers 36. The vertical adjustment of this table can he effected in any' suitable manner-as, for example, by means of nuts 37, mounted on the threaded rods 3S, which, projecting into sleeves 39 in the frame 35, serve as guides for the latter. The peripheries of the nuts 37 on which the frame rests are toothed to engage worms on the shafts 40, so connected by suitable gearing as to rotate in unison to raise and lower the table. By suitably adjusting the feed-table the upper surface of the article to be sheared can be brought into or nearly into contact with the upper shearblade, so that there will not be any material lifting of the article by the lower shear-blade when forced up to shear the article. The shearing mechanism can be of any suitable or desirable construction of the upcut type. In the construction shown the lower shearblock 8 is connected by rods 7 to the upper cross-head, having the ram 4 formed integral therewith. 'Ihe cylinder is formed in the stationary head-block 3, to which the upper shear-blade is also secured in any suitable manner.

I claim herein as my invention- 1. A shear mechanism having in combination an elevated head-block, a lifting crosshead arranged above said block, a duid-pressure mechanism arranged between said block and cross-head and a movable shear-block arranged below the head-block and connected to the lifting cross-head, substantially as set forth.

2. A shear mechanism having in combination a block carrying the upper shear-blade, a lifting cross-head arranged above said block, a lower movable shear-block connected IIO to the lifting cross-head, and means Afor Vertically adjusting the block carrying the upper shear-blade, substantially asset forth.

3. A shear mechanism having in combination an elevated head-block, a lifting crosshead arranged above said block, a fluid-pressure mechanism interposed between said block and cross-head, a movable shear-block arranged below the head-block and connected to the lifting cross-head and an adjustable shear-block arranged between the head-block and lower shear-block, substantially as set forth.

4. A shear mechanism having in combina-- block arranged below the head-block and connected to the lifting cross-head, an upper shear-block arranged between the head-block and lower shear-block, a presser-block mounted on the upper shear-block and means for holding the presser block yieldingly as against the upward movement, substantially as set forth. n

6. A shear mechanism, having in combination an elevated head-block, a lifting crosshead arranged above said block, a fluid-pressure mechanism interposed between said block and cross-head, a movable shear-block arranged below the head-block and connected to the lifting cross-head, an upper shearblock arranged between the head-block and lower shear-block, fluid-pressure mechanism for vertically supporting the upper shear-block, and mechanism for forcing down the upper shear-block against such fluid-pressure mecha anism, substantially as set forth.

In testimony whereof I have hereunto set my hand.

SIGMUND V. HUBER.

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