US293167A - Assigxoe of one-half to - Google Patents

Description

2 Sheets--Sheet 1.

`(No Model.)

PgMgHjAAS. MACHINE POR DRAWING METAL BARS.l

Paznted Feb. 5, 1884.

S S t2.

(No Model.) l I ,A P. NL HAAS,

MACHINE DRAWING METAL BARS 'Patented Feb 5 1884.

y@ .mi

UNITED STATnsgPATENT Orricn.

rniLir n. Hans, or YoUNcsrowN, card-Assioma or cnn-HALF ANDREWS, Bucs. a oo., or SAME PLACE.

MACHINE ,FOR DRAWING METAL BARS.

SPECIFICATION forming part of Letters PatentNo. 293,16*?, dated February 5,1884. 4-

i Application filed Api-i120, 1883. (No model.) i

To all whom, it may concern:

Be 1t known that I, PHILIP hlnLANo'rnoN Hans, a citizen of the United States, residing iication.

at Youngstown, in the county of Mahoning and State of Ohio, have invented new and useful Improvements in Machines for Drawing MetalBars, of which the following is a speci- The object of my invention is the production of a machine for drawing rolled shafts or bars through a gaging-die to render them of uniform diameter, and to iinish them in smooth'-` ness and polish of surface. Bars rolled in a heated condition, in a mill iu which the rolls are arranged to reduce the bar in the direction of their axes, are of slight] y greater diameter at the end last through the rolls, by rea! son of the bar losing its heat as it passes through, and therefore presenting greater resistance to the rolls. This unequal diameter is especially objectionable in shafting for receiving pulleys and'couplings, which are often required to be secured in different places on the shaft, and must therefore be slid over the.

shaft from one end tothe other.

I am aware that machines for drawing metal bars through a die to reduce them, instead of reducing by rolling, have been made; but in such drawing operation the barsare previousin the patent `of J. Ostrander, February 14, 4o`

ly treated to remove the scale. `My invention is designed to reduce rolled bars only to the extent of taking out the irregularity of diameter produced in the operation of rolling, and

to give a better polish and surfacefinish than that given by the rolls. In such rolling the polishis given by passing the bars through rolls in the direction of their axes, while the bar is fed by a rubbing action of the rolls, as

1882, No. 253,755L. Reducing heated bars by such rolls efcctaally removes the scale and leaves the bar with a smooth polish and betier surface than can be obtained by removing the scale by chemical processes; and my machine is particularly well adapted for iinishin g rolled bars.

My invention comprehends a machine for iinishing rolled bars, in which are combined appliances for both pushing and drawing bars through a finishing-die, the said pushing operation being to rst push the bar through the' gaging-die sufficiently far to'allow a rm hold to be obtained by a dog or lgrasping device, by which the operation of drawing the y bar through the gaging-die is effected in the same machine `which prepares the end of the bar for the-drawing-dog. The bar isv supported in the pushing operation within` a y trough, preferably of a V shape in cross-sec2 i tion, and the pushing-abutment is adapted to travel within said trough. In this operation the bar will be caused to sag slightly upon the bottom of the trough, so that whenthe bar is pushed with great force endwise it will tend to iiex toward the bottom of the trough,

and thus keep straight while being forced through the gaging-die.

To more particularly describe my inven-` tion, I will refer to the accompanying drawings, which illustrate the Same, and specicall'y 7o point out the parts and combinations of parts which I claim as new.

Figure 1 represent-s a side view of so much y ofthe machine as shows the bar in the position it4 occupies when being drawn through 75 the gaging-die against a fixed abutment. Fig. 2 represents a top view oi' the machine, showing thedrawing-dog and the bar in position tobe drawn'through the gaging-die. Fig. 3

represents the bar in the trough in the oper- 8o ation of placing the gaging-die' upon the bar to be drawn, showing particularly the sagging of the bar in the trough under the operation of pushing it through the gagingdie. Fig. 4

represents a top view of the sliding abutment represents a similar section on the line y y ot' Fig. 5, showing the pushing-abutment. Fig. y

S represents, on an enlarged scale in vertical longitudinal section, so much of the machine as shows the operation of placing the gagingdie upon the end of the bar as a preparatory step in the operation ofdrawin g the bar through 1 oo the same die.

Hitherto, in machines for drawing metal shafts and bars through a die, it has been necessary to prepare the end of the shaft or barl Vnot only for the grasping device, but to be received by the drawing-die, and such prepara Fig. Grepresents a 9o machine required for such purpose.

tion is usually made by reducing the end of the bar enough to allow it to be easily passed through the die asufiicient length to be grasped by the drawing device. Suchpreparation of the shaft or bar is not only expensive, but en- 'tails a loss in the length of the shaft of that part so reduced to be passed through the die to be grasped. Moreover, in such preparation of the shaft, it has been found necessary to form,by a special maehine,a collar or head upon its end for the grasping device, which very materially increases the expense of the shaft. l

It is one of the objects of my invention not only to avoid the loss of this prepared end of the shaft, and to save the labor and time necessary in such preparation, but to dispense with the necessity of such preparation an d with the It is for this purpose that I have combined in one machine appliances for pushing the end of the shaft or bar first through a gaging-die a sufficient distance to begrasped by the drawingdog, and th`en, by shifting the position of the shaft, with the gaging-die still upon it, to continue the operation by a drawing action upon the shaft through the same die, and thereby preserve the full length of the shaft or bar. A metal frame, A, of suitable length-say thirty feet-is constructed with suitable webbing and supports, and a top bed or way, I3, formed with a longitudinal central trough, C, preferably in the form of a V in cross-section, extending the length ofthe bed or way. In width this trough is about five inches at the y top, and has a depth of about three inches,

and the shaft or bar is supported therein during the pushing operation. This frameis cast, preferably, with a yoke, I), at one end, having a vertical abutment, E, which is provided with a verticall opening, F, just in line with the trough,.and extending down below the bottom thereof. This abutment is supported by braces cast with the yoke on each side of the vertical opening. At any suitable point upon the top of this bed is secured an abutment, G, of metal. It is formed with side grooves, and is adapted to fit over the flanges of way B of the bed, as in Fig. 6, upon which it is slid from its end. It has a horizontal opening, IvI, in the part which extends above the bed, and in its rear end is set, in a recess against a shoulder, a metal bushing, I, having an opening central with the opening H, of a diameter to suit the bar being drawn. This bushing is removable, so that others may be used as a center guide to suit the diameter of the shaft to be drawn. This abutment is fastened to the vbed by a chain, J, attached to hooks on each side of the abutment, and passed through an opening in the web of the bed, so as to form ahold for the abutment. Itis also provided with clampserews a, by which it is clamped tothe flanges of the bed, so as to keep it firm. Against this abutment the gaging-die K is placed and supported during the operation of drawing the shaft, the said die, when so used, being su pported upon the bar,'which is supported by the guide-bushing Iof the abutment, so that the die is held firmly against said bushing by the drawing force. There is therefore an abutment at each end of the bed, both having a fixed relation thereto-one, G, being adjustable thereon to suit the length of the bar to be drawn. In this abutment G the opening through which the bar is drawn is above the v.top ofthe bed, and in such operation the bar is supported by the bushing and the drawing device. The same die used in the drawing operation is first placed against the face of the abutment E in position between it and the end ofthe bed, with its opening F in line with the trough C, within which the bar Lis supported in the operation of pushing it into and through the die the required distance, for the purpose stated. In these separa-te and distinct operations in the same machine I use a movable die, K, which, in the first of said distinct operations, I place upon the end of the bar being treated, as a preliminary step, as shown in Fig. 8, so that both may then be transferred to another. position, after which the bar may be drawn through the same die in the second distinct operation, as shown in Fig. 5. The operation of placing the die K upon the end of the bar is effected by a sliding metal abutment, M formed with side grooves adapted to the flanges of the bed, upon which it is slid from the end before the abutment G is slid in place. This abutment M is formed with a nose or projection, b, adapted to travel in the trough C,l so that it abuts against the end of the bar L lying therein, and when pushed or drawn forward it forces the bar into the die K, which is thereby placed upon the bar, as in Fig. S. This abutment-nose b may be faced with steel. As to push the bar through the die requires great force, the bar is liable to iiex and to spring upward from the trough. To prevent this, the bedway and the bottom of its trough C are made slightly curved vertically from end to end from a horizontal line, so as to give a concave bedway, and thereby allow the bar supported within the trough to sag, as in Fig. 3, and in this way counteract all tendency of the bar to bend or spring upward by reason of directing such fiexingtendeney downward in the sag of the trough. In this action the Vv form of the trough gives a perfect support to the bar. This pushing-abutment M serves also as a carriage for the grasping device by which the bar is drawn, so that it is adapted to push and to pull and to perform both functions, or separate and distinct operations, in

IOO

IIO

connection with a removable die. Any suitable dog or gasping device maybe applied so long as it is adapted to seize lthe end of the bar which has been placedin position through the xed abutment G. The dog which I have shown, however, is the kind I shall use, because in practice it has been found to give a firm and secure grip upon the cylindrical end of the bar, and to require no preparation of be employed for operating the pushing andV drawing abutment. That shown consists of a chain, N, preferably passed through a semicircular way in the abutmenthead, as shown in Figs. 4 4and 8, and, passing on each side of thebedway or trough, has its ends connected to separate drums P I), which are mounted upon a shaft, Q', supported in bearings in the yoke D of the bed and an outside pillar, as

shown in Fig. 2. AThis gives an equalizingpull upon the pushing and drawing abutment, and for that reason is a preferable way of connecting said chain with the said sliding abutment.

One end of the drumshaft has a large gear, It, which meshes with a shifting-pinion, S, on a short shaft, T, which also has a large gear, U, which meshes with a pinion, V, on a short shaft, V', a large gear, W, upon which meshes with a pinion, X, on a short shaft having `a fast and loose pulley thereon, by which the train of gear is 'operated from any suitable motor. The shifting-pinion S is-connected with a shifting-lever, S', by which to disengage the drum-gear when it is desired to stop the operation of the machine, or to change the direction of movement of the sliding abutment to return it in position for operation, either to push or to draw. Since, therefore,- the sliding abutment Mis adapted to both push and to draw the bar or shaft, the operating mechanism is adapted to effect both the pushing and the drawing movement of said sliding abutment. The abutment having, in the operation of drawing the bar, reached the drum end of the bed, the `drawn bar is removed from the dog by releasing the hold of the latter, when the sliding abutment is returned to the position it occupied at the commencement of the drawing operation, to again repeat the operations of pushing and drawing in the production of another finished shaft. This return movement of the sliding abutment may be effected by any suitable A convenient arrangement of such means is shown in Fig. 2, and consists of a windingdrum, z, fitted to run loose upon a shaft, which, by a gear, u, is constantly in gear with the train for operating the sliding abutment. 'A shifting-clutch, e, upon the drum-'shaft serves to connect said drum with the shaft, and thus to wind a rope or chain, w, connected with the sliding abutment M, and passing over a sheave, upon the rear end of the bed or trough, and thus pull back the sliding abutment. In the for-A ward movement of the sliding abutment, the clutch u is thrown out, and the drum is again loose on the shaft, and the rope allowed to unwind. Any suitable clutch device or friction-roller may be employed for this purpose.

It will be understood that the operation of placing agaging-die upon the end of a bar and the operation of drawing a bar through a gaging die so placed may be effected at the same time in the same machine, in which case, while a die is being placed upon a bar, another bar will be drawn through a dievpreviously placed thereon.

1. Ihe combination, in one machine, of appliances for pushing and for drawing bars or E'shafts of metal into and through a gaging-die adaptedto be shifted in relation to fixed abutments, whereby the vsaid dieis placed upon .the bar as a preparatory operation of drawing the bar through it, substantially as described, for the purpose specified.

2. In a metal-drawing machine, the combination of a troughshaped bed or way with a fixed abutment, E, aremovable gaging-die, K, a pushing-abutment, M, adapted to slide upon and within said trough, and means, substantially such as described, for drawing said pushing-abutment within said trough against the bar to place the die upon its end, for the purpose specified. i

3. The combination, in a metaldrawing machine, of a tronghshaped bed or way,with a fixed abutment, G, a removable gaging-die, K, au abutment, M, adapted to slide upon said trough, a suitable dog or grasping device carried by said sliding abutment, and means, substantially such as described, for operating the drawing device.

4. 'Ihe combination, with suitable drawing mechanism and a removable gaging-die, of a trough-shaped bed or way, abutments having fixed relation thereto, forming supports for said gaging-die, and an abutment having a nose adapted to slide within said trough to push the bar therefrom into said die, and carrying a suitable dog or grasping device adapted to draw the bar through said die, both the pushing and the drawing operations being in the same direction, substantially as described.

5. Ina metal-drawing machine, the combination of al trougli;shaped bed or way having a concave line of support for thebar in the line of the drawing action, with the abutment M, having a nose adapted to travel in said trough, an abutment, E, fixed at the end of 'said trough, a removable gaging-die, and suitable drawing mechanism for said abutment M, substantially as described, f'or the purpose specified.

IOO

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

PHILIP M. I-IAAS.

llfitiiesses:

A. E. H. JoHNsoN,

J. NV. HAMILTON JOHNSON.

Images