US1883956A - Shears - Google Patents

Description

Oct. 25, 1932. KLING 1,883,956

' SHEARS Filed Jan. 12. 1931 4 Sheets-Sheet 1 Mvevvlar: F650 5 M/A/ Oct. 25, 1932. KUNG 1,883,956

SHEARS Filed Jan. 12. 1931 4 Sheets-Sheet 2 i I bat/922507": FEED 5 Aim/c7 W v M F. E. KLlNG Oct. 25, 1932.

SHEARS Filed Jan. 12, 1931 4 Sheets-Sheet 3 j QFEED E M/A/G, 5y

Oct. 25, 1932.

EARS

Inventor.- FEED 5 K4 l/VG,

Patented Oct. 25, 1932 UNITED STATES FIRED E. KLIN, or YOUNGSTOWN, OHIO SHEARS Application filed January 12, 1931.

This invention relates to metal cutting shears and more particularly to oscillating shears which are employed for severing metal, such as hot billets or bars, into short lengths suitable for rolling. The billets or bars to be sheared or out are adapted to be out into a plurality of short lengths for rolling and are heated in a furnace prior to shearing or cutting. The heated bars or billets are pushed or run out on a suitable table and between the blades of the shear of this invention and a short length suitable for rolling is sheared or cut off the bar or billet, after which the remaining portion is either run back to clear the shear or is run back into the furnace until the next cutting step is made. The above method of handling and shearing billets or bars forms no part of this invention, and is a practice well known in the art.

It is among the objects of this invention to provide billet cutting shears which shall be of simple and durable mechanical construction embodying a minimum number of parts.

It is a special object of the invention to provide means for maintaining the knives of the shears in cooperative alinement during the complete cutting cycle to prevent deformation of the ends of the cut bars.

The construction and operation of the shears will be more clearly understood in connection with the accompanying drawings constituting a part hereof, in which like reference characters designate like parts and in which Figure 1 is a front elevational view of a shear embodying the principles of this invention; Figure 2 a cross-sectional view of the knife and knife-holder showing the end of the cutting stroke; Figure 3 an end elevational view of the structure shown in Figure 1; Figure 4 a sectional elevational view taken along the lines IVIV of Figure 1; and Figure 5 a similar view taken along the lines VV of Figure 1.

Figures 6 to 9 illustrate the cutting action of the blades from the beginning to the end of one cutting stroke.

With reference to the several figures of the drawings, the structure therein illustrated Serial No. 508,348.

comprises a frame work consisting of vertical supports 1 having transverse frame members 2 and having a pair of oscillating shafts 3 and 4 journalled in the upright frames with their axes in parallel relation.- A short crank shaft 5 having double cranks 6 and 7 is journalled intermediate the shafts 3 and 4 and is connected to oscillate the latter through cranks 8 and 9 and connecting rods A pair of arms 11 are mounted for movement with the shaft 3 and engage a pair of trunnions 12 of a swinging knife holder 13 in which the cutting blade 14, Figure 2, is mounted. A second knife holder 15 carrying blade 16 is rigidly secured for movement with shaft 4. The knife holder 15 is pro- Vided with rollers 17 which engage yokes 18 f the upper knife holder 13, the yokes acting as guides for the rollers which are slidable therein to maintain the knife holders in cooperative alinement during the cutting cycle, as is illustrated in Figures 6 to 9 inclusive of the drawings, Figure 6 illustrating the beginning of the shearing action of the knives and Figure 2 the position of the knives at the end of the cutting stroke.

As will be more clearly understood in connection with Figure 4 of the drawings, the trunnions 12 of the upper knife holder have their axes in substantial alinement with the cutting edge of the blade 14 to stabilize the knife holder in its cutting movements, and in comparing Figures 2, 4 and 5 of the drawings, the roller 17 will be seen in its extreme positions in the yoke, Figure 2 being the position at the end of the cutting stroke and Figures 4 and 5 at the beginning of the stroke.

' The complete cutting cycle takes place during a revolution of the crankshaft 5. The bar or billet to be cut is run out on a suitable table and between the shear plates, and is free to move on the table with the oscillation of the shear plates and their holders during the shearing or cutting operation.

As the shaft 5 revolves the shear blades and. their holders are first moved through their shearing stroke and then are returned to open or rest position. The shear blades and their holders travel through an arcuate path during both their cutting or shearing and re turn strokes. During the cutting or shearing stroke of the blades the bar or billet moves forwardly on the table with the blades, and on the return stroke of the blades, unless the uncut portion of the bar or billet is run back on the table to clear the upper blade 14, the blade will push the uncut bar back along the table until the blade clears the bar.

Although one embodiment of the invention has been herein illustrated and described, it will be obvious to those skilled in the art that various modifications may be made in the details of construction without departing from the principles herein set forth.

I claim:

1. Metal cutting shears comprising, in combination, a supporting framework, a pair of operating shafts journaled in said frame, a crankshaft disposed between said first named shafts, cranks and connecting-rods joining said shafts, a pair of arms movable with one of said pair of shafts, a knife holder having a knife blade secured to its lower edge, said knife holder being pivotally joined to said arms on an axis substantially in alinement with the cutting edge of said. knife blade, a knife supporting frame mounted for move ment with the other of said pair of shafts, yokes on each end of said knife holder and rollers on each end of said knife supporting frame, said yokes being engaged over said rollers to maintain said knife holder and said knife supporting frame in cooperative alinement during their complete operating cycle. a 2. Metal cutting shears comprising, in combination, a supporting framework, a pair of operating shafts journaled in said frame, means for operating said shafts, a pair of arms fixedly secured to one of said pair of shafts and having trunnion-receiving openings adjacent their free ends, a knife holder having a knife blade secured thereon and provided with trunnion members adjacent each end and having their axes in substantial alinement with the cutting edge of said knife blade, the trunnions of said knife holder being mounted in said trunnion-receiving openings of said arms to form a pivotal connection between said knife holder and said arms, a knife supporting frame fixedly secured on the other of said pair of shafts, a knife blade carried by said knife supporting frame, and cooperating means carried by said knife holder and said knife supporting frame forming a sliding connection between said holder and said frame for maintaining said shear blades in cooperative alinement during their complete operating cycle.

3. Metal cutting shears comprising, in combination, a supporting framework, a pair.

of operating shafts journaled in said frame, means for operating said shafts, a pair of arms fixedly secured to one of said pair of reeaeee shafts and having trunnion-receiving openings adjacent their free ends, a knife holder having a knife blade secured thereon and provided with trunnion members adjacent each end and having their axes in substantial alinement with the cutting edge of said knife blade, the trunnions of said arms to form a pivotal connection between said knife holder and said arms, a knife supporting frame fixedly secured on the other of said pair of shafts, a knife blade carried by said knife supporting frame, yokes on each end of said knife holder and rollers on each end of said knife supporting frame, said yokes being engaged over said rollers to maintain said knife holder and knife supporting frame in cooperative alinement during the complete operating cycle.

4. Metal cutting shears comprising, in com bination, a supporting framework, a pair of oscillating shafts journaled in said frame, a crankshaft disposed between said first named shafts, cranks and connecting-rods joinin said shafts, a pair of arms fixedly mountec on one of said pair of shafts and provided with trunnion-receiving openings adjacent their free ends, a knife holder having a knife blade mounted thereon and provided with trunnion members at each end, said trunnion members being positioned on said knife holder so that their axes are in substantial alinement with the cutting edge of the knife blade carried by said holder, said trunnions being mounted in said trunnion-receiving openings of said arms to form a pivotal connection between said knife holder and said arms, a knife supporting frame fixedly secured to the other of said pair of shafts and having a knife blade secured thereto, yokes on each end of said knife holder, and rollers on each end of said knife supporting frame, said yokes being engaged over said rollers to maintain said knife holder and knife supporting frame in cooperative alinement during their complete operating cycle.

In testimony whereof, I have hereunto set my hand.

FRED E. KLING.

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