US851435A - Tube-rolling mill. - Google Patents

Description

PATENTED APR. 23, 1907..

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No. 851,435. PATENTED APR. 23, 1907.

J. G. PRY. TUBE ROLLING MILL. PPPPPPPPPPPPPPPPP 0T.2, 1903.

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JOHN PRY, OF SHELBY, OHIO.

TUBE-ROLLING MlLL.

Specification, of Letters Patent.

Patented April 23, 1907.

Applieationfiledoctober2,1903. SerialNo. 175.502.

To all whom it may concern Be it known that I, JOHN C. PR1, a citizen of the United States of America, and a resident of Shelby, in the county of Richland and State of Ohio, have invented certain new and useful Improvements in Tube-Rolb.

ing Mills. of which thefollowing is a specifi cation.

My invention relates to the manufacture of seamless drawn tubing and is adapted to bemused in connection with a tube rolling m The object of my improvement is to provide a means for supporting, guiding and bracing themandrel rod when the tube or billet is being rolled over the mandrel or ug'. t is well known that in rolling seamless tubing over the mandrel or plug the mandrel is subjected at times to more or less stress or strain, causing it to bend or buckle which will result ordinarily in a defective tube. It is necessary in order to prevent and overcome the strain, to provide a guide that will support and brace the mandrel and keep it in perfect alinement with the grooves in the rolling mill which coincide with the grooves provided in the guide. The groove in the guide is made wider than the corresponding roove in the rolling mill, to permit the mandrel and the tube which is drawn over it to move freely in'the guide. in rolling tubes of various sizes it is necessary to support the mandrel at difl'erent'points of its length to obviate the tendency of buckling or bending as stated. It is import ant to provide a guide that will permit the tube to move over the mandrel and pass through the guides freely, and at the same time obviate the tendency of the mandrel to buckle or bend when subjected to the stress or strain, to which the mandrel 0r phi is subjected, which is communicated to tie mandrel rod causing it to vibrate and at times lift up, which results in l throwing the mandrel rod out of the yoke.

A further object of my invention is to provide a device that will support and guide either long or short rods, making it practical to roll tubes of varying lengths and of different sizes and gages, which considerably re duces the amount of labor that it is now nec essary to perform without its use. It wlll also be noted that the;guides are constructed 1 in such a manner as w .provide the operator with easy access to the mandrel when it is desired to remove the tube from the mandrel ;"11B1I1g in rolling the tubes. It wil and pass it through the next groove in the rolling mill, or remove it therefrom when the tube is finished. This is important as it greatly increases the capacity of the rolling mill, as the tubes can be removed from the mandrel with greater facility.

I attain these and other objects by the mechanism illustrated in the accompanying drawing, in which,

Figure l is a longitudinal top plan View of my device showing it mounted on longitudinal supports which are attached to the housings of a rolling mill. Fig. 2 is a View in side elevation showing the draw bars attached to a series of angular leversor bolts. F i 8 is an end view of one section of my cevice showing the position of the lever when it is in mesh with the notches provided in the up per portion of the guide, (seeFig. 4). It also shows a side view of the bracket upon which the mandrel guides are mounted. Fig. 4 is a side view of the mandrel guide provided with a hooked portion. This view is taken on the line lV-IV of Fig. 3 and shows the lever in contact with the notched or hooked portion of the uide. Fig. 5 is a side view of the mandrel guide taken through the line III-- tion removed.

In constructing my device I provide two longitudinal supports 1 and securely attach them to the housings 2 of an ordinary rolling mill. A yoke 3 having suitable apertures provided therein and adapted to adjustably fit the free ends of the supports 1, is provided and adapted to be adjustably mounted on the supports so as to adjust it to conform to the length of the tube it is desired to roll.

One end of the mandrel rod 4 is supported in suitable apertures provided in the plate 3 carried. by the yoke 3, The opposite end 4 of the rod & has the mandrel lu 7 attached thereto when the operation 0 ro lling is being performed, and is supported in the groove of the rolling mill which corresponds with' the aperture providedin the plate. A series of brackets 5 are ad justably secured to the supports 1 throughthe medium of the bearings 6. The bearings are shown in Fig. 3 and are III of Fig. 3, with the notched or'hooked pormade in sections and clamped together by any "ordinary clamping means which holds them in frictional eontavt with the supports 1. This provides a means of itd1ll5t111g the brackets on the supports to conform to the length of the mandrel red the operator is be noted that each bracket can be adjusted independently of the remaining brackets so as to en 1 port the mandrel at any point desired. T e

V T he upper portion of the guide or support is forming the guides va provi ed with a series of grooves 7 avin the lower portions or walls thereof adapted to support the mandrel rod, with the sides roove adapted. to guide the mandrel'and ice it in alinement with the groove of the ro ling mill when it is being subjected to the stress or strain of the rolling operation. The (grooves 7- provided in the in wi th to provide, for the different sizes mandrel rods,-and are made Wider than the corresponding grooves in the rolling mill, the purpose of which is to rovide a means of permitting the tube to. e drawn over the mandrel freely. The tendency of the mandrel rod to vibrate or lift up is obviated as the mandrel is brought in" contact with either side of the'grooves. and-is thereby kept in perfect alinement with the groove provided in the rolling mill. 7 The lower-Wall 7 of the groove 7 is made convex in form to ermit the tube to move over its surface reely whenit is being drawn or rolled over the mandrel or plug 7 j I The form of mandrel guide shown in Fig. is the one I prefer to use, but I have found it desirable in rolling tubes small in diameter or of'great length to use the form of the mandrel guide shown in Fig. 4. In using this form of mandrel guide and sup ort a series of levers 8 having one end turne at an angle with the body portion is pivoted to the guides 7 by means of bolts 9. A draw bar 11, having a series of apertures coinciding with the apertures in the turned portions of the levers,

' is provided and adapted to connect the levers together whereby" the levers can be drawn in or out of contact with the notched. or' hooked ortions -1() of the mandrel rod guides simu taneously, permitting the operator to remove the tube from the mandrel preparatory to placing it in the next groove of the rolling mill. When the billet or tube is being rolled over the lug or rnandrel the tendency of the mandrel rod to vibrate because of the strain that it is being subjected. to by the rollin process, is obviated and all danger of buckling or bending removed as the tube is brought in contact with the lower portion of the an ular levers and held in place. The dotte the position of the levers when they are out of contact with the notched portions of the mandrel guides. It'will be noted that my device can be used successfully with or without the notched or hooked portions of the mandrel guides. My device is designed to be used in CODJULHQIJIOII with the ordinary tube rolling mill and is mounted on the frame work as described.

lines (see Fig. 1) show i ln'performing the function of rolling the tubes the billet is rolled over the plug or "mandrel 7 which is secured to one end of the mandrel rod. It will'be observedthat the plug is made larger in diameter than the mandrel to which It is secured so that the inner periphery of the tube which is being drawn 6 are provided in the brackets 5 through which the bolts 2 pass, affording. facilities of raising or lowering the mandrel guide or supports, bringing the lower portion of the groove in contact with the mandrel as deauLlDed. When the form of the mandrel lde (shown in Fig. 5) is being used and it is v esired to remove the tube from the mandrel rod-the operator pulls the draw bar toward him andit beingattached to the angular levers, they are drawn into the position shown by the dotted line E. This leaves the upper portion of the groove 7 without obstruction permitting the mandrel rod to be taken out and the tube removed therefrom.-

To briefly state the operation, one end of thebillet is inserted in one of the passes between the rolls and forced over the mandrel rods being carried through. the guides in alinement therewith, after which the mandrel rod is drawn out through the forward end of the Slight changes can be made in the form or construction of my device without deviating frbm the principle involved in my invention.

As for instance when it is desired to use the mandrel support or guide, the form shown in Fig. 4 can be used without the hooked portionby providing apertures 12 in the upper portion thereof and using a straight bar.

The bracket 5 or bearings shown in Fig. 3 can be made as shown that is to say, by roviding each crown of the convened wa s of the guides with countersunk apertures 13 adapted to receive the bolts 0 or other fastening means which register With and are received in apertures formed in the brackets 55, the heads of the bolts constituting the crown of the convex walls, or the brackets may have the guides formed integral therewith.

Having fully described my invention, what I desire to secure by Letters Patent is- 1. A mandrel guide or support for tube rolling mills, composed of a series of mandrel ides or supports mounted on a suitable ame-work and having notches provided in the upper portion thereof, brackets secured to said frame-Work, a series of levers pivotally attached to said brackets and/adapted to mesh with said notches provided in the upper portion of the mandrel guide. V l

2. A mandrel guide or 7 support for tube rolling mills, having a series of brackets attached to the frame-work, a pluralit of mandrel guides securely attached to said brackets, bars ivotally secured to said brackets, whereby t e body portion is made to register with a series of notches providedin the up er portion of the mandrel support, a draw-gar having a series of apertures'provided therein, whereby the levers are connected together, roviding a means of releasing the levers om contact with the notches whereby'the tubes can be removed from the mandrel, sub stantially as and for the purpose set forth.

3. The combination with a suitablesupport, of a grooved guide mounted thereon, the walls of the grooves being laterally recessed and means receivable in the recesses for closing the upper open ends of the grooves.

4. The combination with a suitable support, ofa grooved uide block mounted thereon, the walls of the grooves being apertured and a bar removably received in the endson the block a tures and means connected to one end of the apertures and extending across the upper ends of the grooves to close the latter.

5. The combination with a suitable support, of a grooved guide block mounted thereon, the walls of the grooves being apertured, a bar pivotally supported intermediate its 11 receivable in the aperbar for moving it into or out of the apertures.

' havin 6. The combination with a frame rolls havin passes therein, and mandrel rods supporte in an abutment on the frame, of a plurality of open guides in alinement with the passes adapted to support the entire piece be- 1ng operated upon, and ada ted to permit the said piece being remove laterally from the guides.

-7. The combination with a frame, rolls passes therein and mandrel rods suporte 1n an abutment at one end of the rame, of a pluralit of open guides adapted to support the man rels at intervals throughout t eir length and which admit of the tubes formed being removed laterally from the guides.

8. The combination wi th a frame, rolls and mandrel rods, of guides in alinement with the asses of the rolls, the height ofeach guide being greater than the distance from'the bot tom of its pass to the horizontal plane of the widest portion of the pass, the guide being constructed and arranged to admit of transverse movement of the piece being operated upon from its position in the guides.

Signed at Mansfield, 0. this 25 day of Sept,

: JOHN C.-PRY.

Witnesses:

EDITH OLINE JOHN H. -Ooss.

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