US41836A - Improvement in apparatus for straightening and polishing cylindrical bars or tubes - Google Patents

Description

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UNITED STATES PATENT (DEEICE. v

GEORGE WALTER DYSON, OF TINSLEY, ENGLAND.

IMPROVEMENT IN APPARATUS FOR STRAlGHTENlNG AND POLISHING CYLINDRICAL BARS'OR TUBES.

T0 all whom t may concern.-

Be it known that I, GEORGE WALTER DY- useful Improvement in Machinery for Rolling,

' Finishing, and Polishing Cylindrical Metallic Rods, Bars or Shafts, Tubes or Pipes; and I do hereby declare that the following isa full, clear, and exact description thereof, reference being had to the annexed drawings, forming part o this specication, in which- Figure 1 is a front elevation of my improved machinery. Fig. 2 is a plan or top view. Fig. 3 is a transverse vertical section through the machine at w x, Fig. 1, showing the inside view of the housing for the rolls, and the rolls, guiderollers, and the bar which is being rolled in section. Fig. 4 is an elevation or end view of my machine at the end where the rolls are situate, showing the housing for the rolls. Fig. 5 is an elevation of the opposite end of my machine, showing the housing for the cog-wheels or gearing for driving the machinery.v

In the several figures like letters of re ference denote similar parts.

My improved-machinery consists of a pair of rolls set with their axes not parallel, out slightly inclined in opposite directions to each other, although situate in parallel planes, both rolls being driven in the same direction. The rod, bar, or shaft to be rolled and polished,

` being first rounded, is introduced between guides or guide-rollers, not as is usual, at right angles to the axes of the rolls, but in a line nearly parallel thereto, and by virtue of the opposite inclination of the axes of the rolls it is drawn between them in a line nearly parallel to the axes of the rolls,while it is caused to rotate, and is thereby rendered cylindrical, smooth, and polished.

My machinery is also adapted to the rolling of tubes or pipes by the addition of a mandrel between the rolls, over which the pipe or tube is drawn.

To enable others skilled in the art to construct and use my-improved machinery for rolling and'polishing cylindrical metallic bars or tubes, I will proceed to describe its construction and operation.

In the drawings, a a are the housings of the rolls,which are made in the usual or any convenient manner. In these housings are placed bearings or blocksb b,which carry the brasses in which the journals of the rolls revolve.

c care the rolls, placed horizontally one above the other in the housing, their axes being situate in parallel horizontal planes, as seen in Fig. 1 5 butthe vertical planes passing through their axes are not parallel, but inclined inopposite directions to the central line of the machine, as shown in Fig. 2. Spiral springs s s are placed in the housings a c" of the rolls, to hold up the upper roll c; and d d are pressurescrews in the top of the housing, to press down the bearing of the upper roll.

On the outer face of both ofthe housings a c is placed a horizontal strap, e, midwaybetween the axes of the two rolls c c', which strap supports the journals p p of the two guide-rollers g g, which guide-rollers are placed horizontally between the housings a a, and are designed to guide the shaft or bar of iron in its passage between the rolls c c. The axes of the guide-rollers are parallel to each other and to the central line of the machine. The straps e have a circular opening at h for the passage of the bar of iron which is being operated upon by the rolls.

At the opposite end of the machine is placed the gearing by which the rolls are driven, which is so arranged as to cause the rolls c c to revolve on their axes in the same direction. The gearing is supported by housings k k in the usual manner. It will be seen that the axes of the cog-wheels j j are not in the same ver-tical line. To the gearing-housings k lo is attached a support, with projecting sides ZZ, which extends through the machine to the inner roll-housing, c', to which also it is attached. vThis support serves to sustain and guide the rod, bar, or shaft to be rolled in a straight coursevas it passes from the rolls c c. As the axes of the rolls c c are set in the same vertical line, and are divergent from the same line of the machine, they are connected to the j ournals of the cog-wheelsj j', by which they are driven by the coupling-spindles mm, each ofthe extremities of which enter one of the couplingboxes n n, intoA which also the journals of the cog-wheels jj are inserted, as seen in Figs. 1 and 2.

In the several gures, p represents a bar or shaft passing through the machine.

The operation of my machine is as follows:

A bar or shaft of iron, previously prepared by being made more or less round in any ordinary manner, is introduced while still hot through the circular hole h in the outer strap, e, and between the inclined rolls c c. The rotation of these inclined rolls in the same direction draws the shaft or bar into the machine and causes it to revolve on its axis at the same time between the periphery' c c, whereby it is rendered cylindrical, smooth, and polished. The bar or shaft, thus rolled and polished, passes gradually from between the rolls, between the guides Z Z, and is thus delivered from the machine.

Although I prefer to use guide-rollers g g, revolving freely on their axes, yet thisis not necessary, as guides in the form of flat bars or square blocks may be substituted in their place. or both may be employed in the same machine.

, When applied to the manufacture of pipes or tubes, the machinery remains as before de scribed; but in addition to the guides I use a mandrel between the rolls, over which the tube or pipe is drawn.

Having thus described my improvement,

what I claim as my invention, and desire to sc cure by Letters Patent, is-

1. Rolling and polishing pieces of solid metal or tubing of cylindrical shape by passing them between rolls in a direction in a line bisecting the angle of inclination of the axes of the rolls to each other-that is, in a direction nearly parallel with the axes of the rolls-instead of a parallel direction or one at right angles thereto.

2. The use of rolls the axes of which are inclined to each other, and which are made to rotate in the same direction, through and between which metal rods, bars, and shafts or tubing are made to pass by the rotation of the rolls, aided by guides, for the purpose of giving a cylindrical shape to such bars, shafts, or tubing, and at the same time, if desired, polishing the same.

In testimony whereof I have hereunto set my hand this 14th day of October, A. D. 1863.

GEORGE WALTER DYSON.

In presence of- LEWIS Poonn, JOHN T. ATKINSON.

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