US1097874A - Bending-machine. - Google Patents

Description

T. F. PHILIPPI.

BBNDING MACHINE. APPLIUATION FILED SEPT. 25, 1913.

1,097,874, I Patented May 26, 1914,

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LLL u i inventor: flbbwb T. .Philip 1 ,gwgw v x COLUMBIA PLANOGRAPH 120.. WASHINGTON, D. c.

THEODORE r. rnitirri, OE-EAST. s1. Louis, rumors.

BENDING-MACHINE I Specification of Letters Patent.

Patented May 26, 1914.

Application filed September 25, 1913, Serial No. 791,755.

To all whom it may concern Be it known that I, THEODORE F. PHILIPPI,

a citizen of the United States of America, and a resident of the city of East St. Louis, in the county of St. Clair and State of Illi nois, have invented certain new and useful Improvements in Bending Machines, of which the following is a full, clear,.and ex-- act description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to a simple machine for bending a variety of objects of various thicknesses and shapes, the machine being so constructed as to permit quick adjustment of its parts, in order that it will be operable in bending difierent thicknesses of material,

and pro duce required bends and numerous degrees of angles, with the inner corners of the bends either sharp or round, as may be desired.

Figure I is a perspective view of my bending machine. Fig. II is a vertical longitudinal section through my machine. Fig. III is a vertical cross section through the machine, at the location of the rotatable arbor. Fig. IV is an enlarged side elevation of the forward port-ion of the machine, with the parts shown in the positions assumed in a bending operation, a portion of the base section of-the machine being broken out to afford a view of the stepped gage at the far side of the machine.

Inthe drawings: A designates the base section of my machine, and B the top section.

The base section A includes an arbor box 1 located near the front end of the section, in which is a bore extending transversely of said section, in which'is a bending arbor to be hereinafter more particularly referred to. The base section'also includes a table 2 extending rearwardly from the arbor box 1, at the rear end of which is a vertical abutment 3.

4 is a front horizontal extension projecting from the arbor box 1, and constituting an abutment.

5 designates a-j aw at one side of the base section A, contiguous'to the arbor box 1, and having its forward end extended partially across the bore in said box.

The top section B of my bending machine is located immediately above the base section, and is provided at one side with a jaw 7 overlying the jaw 5 of the base section and movable toward and away from said jaw 5.

The jaw 7 likethe jaw 5, extends partially acrossthe bore in the arbor box 1, and said aw is preferably provided at its bottom with a wear plate 8, of steel, or other hard wear resisting material.

The top section B is tiltably supported on the base section A by fulcrum screws 9,

which extend vertically through the top sec tion and rest upon thetable of the bottom section, the said screws being located near the rear end of the top section. The forward end of the top section is normally held in elevated position, and returned to an elevated position after it has been depressed, by means hereinafter described, by a lift spring 10, surmounting the tail end of the section back of the fulcrum screws 9, the said spring being arranged around a post 11 attached to the base section and extending through a slot 12 in the top section, said post being screw threaded at its upper end and having thereon a nut 13, by which the spring 10 may be placed under tension.

let designates a screw post extending vertically from the arbor box 1, and through a slot 15 in the top section B. This post is provided with a clamp nut 16, by which downward pressure may be exerted upon the forward end of the top section to move the,

jaw 7 of said section toward the jaw 5 of the base section to clamp a piece of material to'be bent between said jaws.

17 designates a horizontal adjusting screw in the rear abutment 3, of the base section A.

This screw extends longitudinally of the machine and bears against the rear end of the top section, and it is employed in the adj ustment of the top section of my machine, in order that'the jaw 7 of said section may be properly adjusted,forwardly orbackwardly, relative to the jaw of the base section, as is necessary for bending objects of different thicknesses or bending the objects with angles of different degrees. A

At the front end of the top section B is a downwardly extending lug 18, which engages the side face of the abutment extension 4: of the base section, and at the rear end of said top section is a horizontal lug 19,which bears against the rear abutment 3 on, the base section. The front lug 18 bears against the abutmentextension 1 at the side of said abutment farthest from the jaws 5 and 7, and the lug 19 bears against the abutment 3 at the side of said abutment corresponding to that at which said jaws are located, this arrangement hein made for a purpose that will be hereinafter made plain.

21 designates a rotatable arbor mounted in the arbor box 1 of the base section A, the

said arbor being therefore arranged trans versely of the machine. One end of this arbor is contiguous to the jaws 5 and. 7, and the arbor is provided at its end with a presser arm or segment 22, movable around the axis of the arbor so that it approaches the upper jaw 7 when the arbor is rotated to bend an object clamped between the jaws. The presser arm is preferably provided with a wear plate 23. The bending arbor is held from longitudinal movement by a retaining screw 2-1 extending through the arbor box into the groove 21 in the arbor.

Rotation is imparted to the bending arbor by a handle bar 25, which extends transversely through the arbor at its end opposite that provided with the presser arm 22, the said handle bar being held in adjusted positions in said arbor by a set screw 26 mounted in the arbor.

2T designates a gage projecting from the base section of my machine at the side of the machine at which the handle bar 25 is located. This gage comprises a plurality of steps at different distances from the axis of the bending arbor, any of which may receive the engagement of the rear arm of the handle bar 25, to regulate the degree of movement of the handle bar and, consequently, the degree of rotation of the arbor. Determination of the step of the gage which receives the engagement of the handle bar is made by longitudinal movement of the bar in the arbor, so that the rear arm of the handle bar will extend to a greater or less degree beyond the arbor and will, when the handle bar is moved, strike a step of the gage in the path of its movement, which is first within the compass of movement of the handle bar arm.

28 designates stop screws arranged in the extension a of the base section A, by which the downward movement of the front end of the top section B may be limited. These screws serve to prevent an excessive strain being imposed upon the top section by the operation of the clamping nut 16, clamping an object between the jaws 7 and 5, and are more particularly important in avoiding breakage of the jaw 7 by such strain.

In the practical use of my bending machine, the upper section B of the machine is normally upheld at its forward end by the lift spring 10, so that the jaw 7 of said section is separated from the jaw 5 of the base section a distance sutlicient to permit of the introduction of an object to be bent between said jaws. At this time, the presser arm 22 of the bending arbor 21 is in a lowered position, as seen in Fig. I, so that its face which is to engage the object positioned between the jaws is in the same plane, or beneath the plane, of the top surface of the lower jaw. In positioning the object to be bent between the jaws, the proper placing of the object is facilitated due to the side of the base section above said jaw being flat, and also due to the outer faces of the jaws being flat and, therefore, the object to be bent may be readily squared relative to the arbor before the bending operation takes place. After the object to be bent has been disposed between the jaws 5 and 7, the upper jaw 7 is moved downwardly into clamping engagement with said object by manipulation of the clamping nut 16 on the post 14-, which causes the forward end of the entire top section to be depressed for the desired movement of'the jaw carried thereby. The object to be operated upon now extends over the working face of the arbor presser arm and the bending operation is effected by rotating the arbor, through the medium of the handle bar 25, and the rotation of the arbor causes the presser arm to move forwardly and upwardly in an arc of a circle, the movement in such direct-ion being continued until the desired bend has been effected.

In the illustration in Fig. IV, the bend secured by the movement of the bending arbor is a right angled one, and when a bend of this degree is effected, the handle bar strikes against the top step of the gage 27, due to the rear arm of said bar being of such length that it will not pass said step. It will be obvious that if the rear arm of the handle bar is shortened by adjustment of the bar in the arbor, the object between the jaws may be bent to a greater degree, and the arm of the handle bar will strike a lower step; and it will also be obvious that a bend of less degree than that illustrated in Fig. IV may be obtained by less rotation of the bending arbor.

The lug 18 and 19 of the top section B and the abutments 4 and 3 of the base section which receive said lugs are important features of my machine, in that they seive to hold the top section in alinement with the base section when it is subjected to lateral strain by pressure against the jaw 7 transmit-ted from the presser arm of the arbor. This is particularly important in view of the jaws being located at the side of the machine, so that there is a twisting strain imposed on the upper section during the act of bending an object clamped between the jaws.

I claim 1. A bending machine comprising a'bottom section having a side jaw, a top section surmounting said bottom section having a side jaw overlying the jaw of the bottom section, the top section being provided with forward and rear longitudinal slots, a fulcrum for said top section located intermediate of said slots, a clamping post extending from said bottom section through said forward slot, a post extending from said bottom section through said rear slot, a

- spring surrounding the last mentioned post by which said upper section may be tilted on said fulcrum, and a bending arbor extending transversely through said bottom section and opposing the jaw of said section.

2. A bending machine comprising a bottom section having a side jaw, a top section surmounting said bottom section having a side jaw overlying the jaw of the bottom section, the top section being provided with forward and rear longitudinal slots, a fulcrum for said top section located intermediate of said slots, a clamping post extending from said bottom section through said forward slot, a post extending from said bottom section through said rear slot, the said slots permitting longitudinal adjustment of said top section relative to said bottom section, and a rotatable bending arbor extending transversely in said bottom section having a work engaging element located opposite the jaw of said bottom section.

3. A bending machine comprising a bottom section having a side jaw, a top section having a side jaw overlying the jaw of the bottom section, the said sections having slot and post connection with each other permitting adjustment of the top section longitudinally of the bottom section, and said sections having cooperable abutments for preventing twisting of the top section on the bottom section, and a bending arbor rotatably mounted in said bottomsection having a work engaging element opposed to the jaw of said bottom section.

4:. A bending machine comprising a pair of sections one of which is movable relative to the other, the sections being provided with jaws between which an object to be bent may be positioned, a bending arbor having a presser arm adapted to engage the object to be bent, a lever bar adjust-able in said arbor, means for holding said lever bar in adj usted positions in said arbor, and abutments located at different distances from the axis of said bending arbor and adapted to be engaged by said lever bar whereby the degree of rotation of said arbor is regulated.

5. A bending machine comprising a pair of sections one of which is movable relative to the other, the sections being provided with jaws between which an object to be bent may be positioned, a bending arbor having a presser arm adapted to engage the object to be bent, a lever bar adjustable in said arbor, means for holding said lever bar in adjusted positions in said arbor, and a stepped gage carried by one of said sections adapted to receive said lever bar to limit the degree of rotation of said arbor.

THEODORE F. PHILIPPI.

In the presence of- E. K. CLARK, E. B. LINN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of ZPatents,

Washington, D. G. V

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