US907889A - Bending and straightening machine. - Google Patents

Description

A. ROGGB. BENDING AND STRAIGHTENING MACHINE.

APPLICATION FILED FEB. 24, 1906.

Patented Dec. 29, 1908.

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A. ROGGE. BENDING AND STRAIGHTENING MACHINE. APPLIOATION FILED 1133.24, 1906.

Patented Dec. 29, 19.08.

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APPLIOATION FILED FEB. 24, 1906.

Patented Dec.29,19os.

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A.' ROGGE. BEN DING AND STBAIGHTBNING MAGHINE. BPLI'OATION FILED rms. 24, 1906.

907,889. n v l v Patented De0.29, 1908.

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specification of Letters Patent.

Patentes nee. 2e, 196e.

Applcatin filed February 24, 1906. Serial No.` 302,735.

T all 'whom it may con-cern:

Be it known that I, ALBRECHT Rosen, a subject of the King of Prussia, and a resident of Nordhafen 8, Berlin, Germany, have invented a new and useful Improved Bending and Straightening Machine, of which the following is the specification.

The present invention relates to bending machines and straightening machines for rolled-iron and the like.

In the case of hitherto known bending and straightening machinesfor rolled-iron and the like it has hitherto been necessary to move the tool, such as a straightening stamp, situated opposite the straightening plate or surface-plate by the instrumentality of such elements as permit the working-stroke to be adjusted or to be regulated. This necessity wasdue to the circumstance that materials of the most various profiles hadt be dealt with on one and the same machine. Such adjusting devices, however, cause the ma= chines to be somewhat complicated and moreover in operation they were not reliable to the desired degree.

The present invention relates to a bending and straightening machine in which the tool or the slide for receiving the straightening or bending stamp is set in action as soon as said slide is rigidly connected by means of a cotter or wedge or the like with the end of one or more connecting rods which continuously receive a uniform reciprocating motion by means of an eccentric or other suitable means. Now in order to render the machine provided with such a device for always imparting to the tool a 'stroke of constant length highly serviceable for materials or work, that is articles to be operated upon, of all possible dimensions, according to the present invention a device for finely adjusting the surface-plate is provided, and consequently the means for adjustment are transferred to that place wh ere the greatest use of them can most suitably be made.

The accompanying drawings illustrate by way of example two embodiments of machines according to the present invention, in

the case of each embodiment the same reference characters designating in all figures the same parts.

In said drawings-Figure 1 is a side elevation of one embodiment of a straightening or bending machine according to the present invention, and Fig. 2 is an end elevation showing the spur-wheel gear of said machine. Fig. 3 is an end elevation of the lower portion of the second embodiment of a machine according to the present invention, while Fig.- 4 is a side elevation of the same, and Fig. 5 a plan of the same.

Referring to Figs. l and 2, a is the base plate which is cast in one piece with the per# pendicular sides b b. Between the latter and at one side is mounted the spur-wheel gear for driving the straightening stamp arranged displaceably onthe other side.v c c are fast and loose pulleys arranged on the shaft d for switching the power on and off. Upon the shaft d is mounted the toothed wheel e which drives the larger toothed wheel f situated on the shaft g which carries a second smaller toothed wheel h keyed rigidly to it, which wheel 7LV transmits the motion which is thus again reduced ver f much in correspondence with. the size of he wheel to two toothed wheels i fi f equal size mountedon the shafts 7c l. An eccentric m is situated centrally on each of said shafts 7c Z, the motion of said eccentrics being transmitted by means of eccentric rods n n to the slide o arranged at the front end of the machine, which slide carries the straightening or bending stamp p which is adapted to be adjusted by means of the handle g. Said stamp p is arranged so as to be capable of being interchanged with other stamps as also are the surface-plates or matrices r r which are fixed, for example bolted, on the two iXed sides l) b. Said surface plates or matrices serve as a resistin support or abutment for the article or wor s to be ben-t which in the drawing is represented as an I-beam. The pressure-surfaces or working surfaces of the stamp p and of the matrices r 1i lie exactly parallel to one another and at right angles to the motion of the eccentric rods n n. In order to avoid the necessity of having to switch off the machine during the forward motion of the work the connection between the eccentric rods n n and the slide o is not a rigid one, but it is effected by inserting cotters t or other suitable members which can be adjusted from the front of the machine suitably by means of two-arm levers u. The cotters t (shown in Fig. l) are linked to the levers u which are pivoted to the frame of the machine. By drawing the lower ends of the levers u off from the machine the cotters are lowered and thereby brought out of contact with the rods n and the slide o, whereby then the rods n therefore the slide remains at rest.

move freely, whereas otherwise the slide is rigidly coupled with said rods. In order to facilitate the forward motion of the Work it is advantageous to support the latter upon rollers v o and in order to enable the machine to run uniformly a fly-wheel z is arranged on the free end of the shaft d. The machine enables perfect work exact to a millimeter to be turned out and in consequence of its short compact form enables profile-iron to be bent to circles of about 1% meters diameter. On the other hand bent profile-iron can be made perfectly straight again.

Referring to the embodiment illustrated in Figs. 3 to 5 this machine is designed especially for somewhat la" ge work. Nevertheless it can be employed for treating small work, though said work cannot be bent to circles of less than 3 meters diameter. The under frame A A of the machine consists of several, in this case three, T-beams extending from one end of the machine to the other, and said frame suppo: ts the toothed wheel gears B, C, D, E upon the shafts F G H supported on the sides. Said gear is driven from the beltpulley I on one end of the shaft F at the other outer end of which the ffy-wheel K is keyed. Upon the shaft H is situated an eccentric L the motion of which is transmitted by means of the eccentric. rod M tothe slide O which is adapted to receive at its front end the bending or straightening tool, that is, the stamp P which is capable of being interchanged with other stamps. The connection between the eccentric rod M and the slide O is in this case also one which is capable of being readily disconnected. The connection is suitably effected by means of the wedge or cotter N which is inserted in slots or longitudinal holes R R in the slide O and the eccentric rod M, and which, for the purpose of undoing the connection, can be withdrawn by means of a lever gearing l Also the cotter N is suitably connected with a lever-gearing by which said cotter can be drawn out of the slots R. Thereby the reciprocating rod M finds no resistance in its movement and The surface-plate T stands parallel and opposite to the slide O or the bending stamp P and at right angles to the direction of motion of the sor/388e' slide, and the work S to be operated upon is placed between said slide or stamp and said surface-plate on rollers U. lf the work S is to be bent two suitable matrices T T2, indicated in dotted lines in Fig. 5, are arranged or fixed upon the surface-plate, for example by means of bolts. The surface-plate T can be exactly adjusted by means of the screwed spindles V, V V2, V3, V 1, V5, said spindles being operated from a lever lV (Fig. 3) by means of ratchet or like mechanism which in the example shown consists of the ratchet wheels X, X, X2, X3, X4, X5 keyed upon the ends of the screwed spindles and of the pawls Z, Z', Z2, Z3, Z4, Z adapted to be actuated by means of the sliding bars VI, and the links XV', 72, l" T3, connecting said sliding bars with the lever W. N ow as the motion of all the pawls is exactly the same and also as all the ratchet wheels have exactly the. same shape and because on the other hand, the screw threads on the spindles have an extremely small pitch, it follows that the distance of the surface-plate from the working shaft H of the toothed wheel E can be adjusted to the utmost degree of accuracy.

The described arrangement for enabling ne adjustments to be made can be applied to the stamp-plate or surface plate of the niachine shown in Figs. l and 2. The forward motion of the work can be effected by hand or automatically by means of the machine.

That l claim as my invention and desire to secure by Letters Patent isz- In a bending and straightening machine the combination of a suitable frame, an anvil supported by said frame, a pair of eccentrics connected by suitable gearing behind said anvil, an adjustable slide opposite said anvil, a pair of eccentric rods connecting said eccentrics and said slide for the purpose of drawing the slide towards the anvil, and keys held by suitable lever gearing in order to disconnect the eccentric rods and the slide.

In testimony whereof T have signed my name to this specification in the presence of two subscribing witnesses.

ALBRECHT ROGG-IC.

Witnesses HENRY HAsrEn, WOLDEMAR HAUPT.

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