US1106741A - Blank shearing and forming apparatus. - Google Patents

Description

E. E. SLICK. BLANK SHEARING AND FORMING APPARATUS.

AT'PLIOATION FILED MAY 22, 1912.

' LWWML Patented Aug. 11, 1914,

WITNESSES arena o nice.

EDWIN E. SLICK, 0F PITTSBURGH, PENNSYLVANIA.

BLANK SHEARING AND FORMING APPARATUS.

Specification of Letters Patent. Application filed May 22,

Patented nag. 11f, rare. 1912. Serial No. 698,882.

To all whom it may concern Be it known that I, EDWIN E. suck, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Blank Shearing and Forming Apparatus, of which the following is a specification.

My invention relates to apparatus for shearing metal blanks which are later subjected to further finishing operations and while not restricted to such use, more particularly relates to apparatus used in cutting a multiple length blank into pieces.

The invention further relates to apparatus for shearing and forming substantially cylindrical blanks therefrom which are used later in making forged metal car wheels and similar articles.

One object of this invention is to provide a cheap and simple apparatus having nov el means whereby a multiple length blank is cut into pieces forming single blanks of a predetermined length. r

Another object of the invention is to provide apparatus having novel means whereby multiple length metal blanks are severed transversely of their axis into single blanks from opposite sides toward the longitudinal axis thereof and a clean cut on the severed surfaces of the blanks is thereby obtained.

A further object of the invention is to provide improved apparatus whereby multiple length blanks are severed into single blanks and single blanks of substantially cylindrical cross section are formed concurrently with theseveringoperations from a multiple length blank of any cross section.

Still further objects of my invention will appear as will be more fully disclosed in the specification and claims.

In the accompanying drawings, forming part of thisspecification, Figure 1 is a sectional elevation showing. apparatus constructed and arranged in accordance with my invention. Fig. 2. is a plan partly in section ofthe apparatus shown in. Fig. .,,1.

Eig. 3 is a side elevation showing theend or a multiple Iengtn blank a snaped at an intermediate POIIItZlI} a severing and blank forming operation. Fig. 4 is an end view vertically'toward and away from each other and the shearknives 4 and 5 advancing and retracting horizontally toward and away from each other. The shear knives are detachably secured on the ends of the pistons or plungers 6, 7, 8 and 9 which are mounted each in one of the double acting hydraulic cylinders 10, 11, 12 and 13. The opposite vertical cylinders 10, 11 and horizontal cylinders 12 and 13 are removably secured in a supporting frame 14 which is provided with'feet 15 by which the apparatus is erected in place on the foundations 16. I

Each of the cylinders, which are removably secured in place, is mounted 011 the frame 14 in the same manner, the stuifing box end of the cylinders being provided with an annular groove 17 and the adjoining portion of the frame 14 is provided with a recess 18 in which a split or sectional ring 19 is inserted. At an intermediate point in the length of the cylinders 10, 11, 12 and 13 an annular flange 20 is provided and a sectional-ring 21 which is split transversely is inserted between one face of the flange 20 and the adjoining face of the frame 14 so as to secure the cylinders rigidly in position on the framework, bolts or other equivalent means are used to fasten the segmental rings 21 in place.

In inserting the cylinders within the openings therefor in the frame 14 the cylinders the opposite are-caused to project into the openings until wardly so as to seat the rings 17 in the recess or groove '18 formed in the supporting frame 14. The sectional rings 21, which are made of the required thickness are then inserted in place and are secured in position so that the cylinders are fastened and securely held in position in the supporting frame 14.

The outer ends of the vided with cylinderheads 22 which are secured place. on theoglinders by means of the transversely divide recessed or counterbored rings 23, the tapering faces forming thesides of the counterbore on the inside of the rings 23, engaging the tapering faces on the cylinder flanges and cylinder heads providing means for'drawing the heads into position and fastening the heads securely in position on-the cylinders. The opposite or cylinders are proinner ends of the cylinders are provided with bushings 24 and glands 25 which co-act to form a stuffing box for the cylinders through which the pistons or plungers project. Inlet openings 26 and 27 on the opposite ends of the cylinders provide means for admitting fluid pressure to the cylinder on opposite sides of the head of the plungers 6, 7, 8 and 9.

As will be seen by reference to the drawings the shear knives or cutters 2 and 3, 4 and 5 have a thin cutting edge 28 extending inwardly from one side surface thereof, and on each cutter is a semi-cylindrical recess 29, the recesses 29 in the opposite shear knives 2 and 3 or 4 and .5 when advanced into engagement with each other forming a substantially cylindrical recess extending inwardly from one face of the opposing pairs of shear knives 2,3 and As shown in the drawings the concave cuttin edges 28 of the vertically movable shear Iinives 2 and 3 are curved inwardly while the cutting edges 28 of the shear knives 4 and 5 extend in a straight line although when desired the cutting edges of both pairs of knives may be concave.

In the operation of my improved apparatus a multiple length blank of rectangular or other cross section is placed in position between the oppositely facing pairs of shear knives. The vertically reciprocating knives 6 and 7 are then caused to advance toward each other by admitting fluid pressure to the inlet ports 26 on the cylinders 10 and 11. In severing blanks from a multiple length blank which is rectangular in cross section, the multiple length blank may be inserted between the shear knives with its top and bottom sides extending horizontally or it may be turned until a line through opposite corners of the blank extend vertically, (as shown by dotted lines in Fig. 1). When the pistons 6 and 7 have been advanced until the adjoining edges of the knives 2 and 3 are in engagement a blank will be partly severed from the portion of the multiple length blank projecting between the cutting edges of the shear knives and, simultaneously with this shearingstep, the semi-cylindrical recesses in the shear knives will form and shape the projecting portion of the blank being severed into a blank of substantially semi-cylindrical cross section. The knives 2 and 3 are then retracted by admitting fluid pressure to the fluid pressure inlets 27 on the other or stufling box end of the cylinders 10 and 11, and fluid pressure is then admitted to the rear end of the horizontal cylinders 12 and-13 so as to advance the pistons 8 and 9 mounted in these cylin ders. j When these pistons move outwardly 1n the cylinders the shear knives 4 and 5 approach, and the-cutting edges 28 thereof engage with the multiple length blank and complete the severing operation from opposite'sides of the blank, the knives moving in a plane at right angles to that of the knives 2 and 3 in the first severing and shaping operation. The knives 4 and 5, when provided with straight cutting edges as shown, in approaching completely sever the partly severed and formed piece from the multlple length blank and also complete the formation of the severed blank, whatever its cross section, into a substantially cylindrical blank or blank of the contour of the recesses. It should be noted that the pairs of shear knives approach the axial center from each side of the multiple length blank in the cutting operations, and, in this important respect, differ from the ordinary shearing operations in which the blanks are severed by the travel of one shear knife through the entire thickness or diameter of the material being sheared, and it also should be noted that the metal is forced inwardly to- Ward its axial center by the curved or concave cutting edge of the shear knives so as to prevent the formation of fins and provide a clean cut sheared surface on the blanks. The above described operations are then repeated as often as is necessary in cutting a multiple length blank into the desired number of single blanks. In making steel blanks for use later in forging metal car wheels the multiple length blank is heated prior to the shearing and form ng operations although with other materials and in making other articles the metal may I or may not be so heated.

The advantages of my invention will be apparent to those skilled in the art. By means of my improved shearing apparatus the blanks are cut from opposite sides toward the axial center thereof and the forma: tion of fins on the marginal edges of the blanks is avoided and prevented. By the use of the recessed forming faces adjacent to the cutting edges of the knives, blanks of any desired cross section are formed frommultiple length blanks of larger size as well as those of a different cross section and blanks of a uniform size and weight are formed simultaneously with the shearing operations.

Modifications in the construction and arknives toward and away from each other, 4

the construction and arrangement of the parts within the scope of the appended claims.

1 claim 1. In a shear a pair of oppositely facing reciprocatory shear knives, a second pair of oppositely facing reciprocatory knives, and means for reciprocating the knives in each pair independently of the other, said knives reciprocating in the same plane, at least one knife in one pair having'a concave cutting edge.

2. In a shear a pair of oppositely facing reciprocatory shear knives, a second pair of oppositely facing reciprocatory knives, and means for reciprocating the knives in each pair independently of the other, said knives reciprocating in the same plane, the cutting edges of at least one pair having oppositely curving concave cutting edges.

3. In a shear a pair of opposed shear knives and means for reciprocating said knives towardand away from each other, and means adjacent to the cutting edges of said shear knives whereby the severed pieces of metal are shaped concurrently with the cutting operation.

4. In a shear a pair of opposed shear knives and means for reciprocating said I said knives having recesses therein whereby the severed metal is formed into a cylindrical blank concurrently with the cutting operation.

5. Apparatus for forming and shearing metal blanks comprising oppositely facing pairs of reciprocatory shear knives, and means for actuating the knives in pairs, said pairs of knives reciprocating in the same plane, the opposing knives in the pairs having recesses therein whereby the metal being sheared is shaped simultaneously with the cutting operations.

6. Apparatus for forming and shearing metal blanks comprising oppositely facing pairs of reciprocatory shear knives, means for actuating the knives in pairs, said pairs of knives reciprocating in the same plane, the opposing knives in the pairs having recesses therein whereby the metal being sheared is shaped simultaneously With the cutting operations, one pair of said knives partly severing and shaping the blanks and the other pair completing the blank severing and forming operations.

In testimony whereof, I have hereunto set my hand.

EDWIN E. SLICK.

Witnesses G. W. NEILL, EARLE R. WALKER.

Images