US2003551A - Tube rolling mill - Google Patents

Description

June 4, 1935. K. A. NYGREN Er AL 2,003,551

TUBE ROLLING MILL Filed April l0, 1953 5 Sheets-Sheet l 515, EW]- y I N VENTOR.

ATTORNEY? VENTOR.

5 Sheets-Sheet 2 ad@ Q Wm ATTORNEY;

June 4, 1935. K, A. NYGREN 'Er AL TU BE ROLLING MILL Filed April lO. 1935 June 4 1935- K. A. NYGREN ET Al. 2,003,551

TUBE ROLLING MILL F'ld April l0, 1935 3 Sheets-Sheet, 3 i 55 Y I E l/ .5/ I 0 J@ l j f '/f/ i /j i /0 /0 E /0 y //g r i 1 L f@ f/ j? v ill l 5% i *A INVNTORQ ATTORNEYS j?? I 4 PZ Mind-wub L 727 I 5 57 Patented June 4, 1935 vUNITED STATES PATENT OFFICE Milwaukee,

assignors to Globe Steel Wis., Tubes Co., Milwaukee, Wis., a corporation of Delaware Application Aprn 1o, 1933, sqm Nn. 665,358 4 calms. (c1. ssi- 11) A This invention relates to a tube rolling mill capable of advantageous use as a reducing mill although also capable of various other tube rolling operations.

Among the objects of the invention are to provide a tube rolling mill wherein the rolls are so mounted, organized and driven as to provide a compact, eicient and durable structure and as to be-capable of easily controlled adjustment whereby to vary the reduction effected by any set of rolls or to take up for wear or to throw in or out of action any roll stand, that is, any particular set of cooperable rolls.

Another object is to provide a-novel form of driving mechanism for the rolls which, while simple and durable and compactly and closely organized, is highly eiiicient in operation and insures the driving of the rolls of each set at a synchronous speed.

Other objects and advantages reside in certain novel features of the construction, arrangement and combination of parts which will be hereinafter more fully described and particularly pointed out in the appended claims, reference being made to the accompanying drawings, forming a part of this speciilcation, and in which:

Figure 1V is a diagrammatic view in side elevation illustrating a plurality o roll stands or units embodying the present invention and corelated for a tube rolling operation;

Figure 2 is a view in elevation showing one of the roll stands as viewed from line 2-2 of Figure l, with parts broken away and shown in section for the sake oi.' illustration;

Figure 3 is a view in longitudinal section taken on line 3-3 of Figure 2;

Figure 4 is a deatil view in section taken on 'line 4--4 of Figure 2; ,"Figureisaviewinsectiontaken on line'i-E .40 of Figure 4;

Figure 6 is a sectional view taken on line 6-8 of Figure 5; Figure 7 is a sectional view taken on line 'I-1 of Figure 4; and v 8 is a fragmentary view showing a portion of the housing in transverse cross section.

Referring to the drawings, it will be seen that the rolling mill comprises a plurality of rolling units designated generally at U, all of identical construction, and mounted upon a common bed B. Each rolling unit comprises a frame or housing designated generally at I and made up oi' a 'main i'rame plate 2 vertically disposed and extending transversely between the rails 2 oi the bed, the frame or housing having supporting shoes 4 integral therewith, interengaged with the members 3 and releasably secured thereto by bolts and nuts 5. An annular ange 6 is integral with or otherwise suitably connected to the plate 2 and to this :Gange and to the plate 2 a removable side plate 'Iis secured by bolts and nuts 8 (see Figure 8). Eyes 9 are secured to webs or extension 6' integral with the frame or housing' I and are adapted Yto coact with hooks of hoistl0 ing chains or tackle to facilitate handling and positioning oi' the unit.

Associated with each frame I and cover plate 'I are'fou'r rolls Ill, the rolls being arranged in sets with the members of each set symmetrically 15 disposed with respect to their common plane and with one pair disposed at proper angles to the other as clearly illustrated in Figure 2. Each roll I0 is securely iixed to the outer end of a roll spindle II. Each spindle Il is supported 20 for rotation in a roller bearing assembly I2 and a ball bearing assembly I3 (see Figures 3.and 5), the assemblies I2 and I3 of each roll spindle being supported within a bearing housing Il and l being so constituted as to prevent axial shifting 25 of their roll spindle with respect to their bearing housing while yproviding for free rotation of the spindle.

Each bearing housing I4 is provided with a pair of cppositely extending angular anges I5 30 extending longitudinally thereof and slidably intertted with channels or grooves I6 provided on the forward end of a slide or mounting block I1 (see Figures 2, 4, 5 and 7). This adjustable intertting of the bearing housing of eachiroll 35 spindle with its slide block provides for adjustment of each roll longitudinally of its axis and such adjustment may be controlled and eilected by any suitable means as, for example, by means of an adjusting bolt or screw I8 extending 40 through apertured lugs I9 integral with the slide block Il and having a threaded portion 2l engaged with a nut 2l integral with its bearing housing I4. The head of the bolt I8 engages one of the lugs I9 and a nut 22 is threaded on the 45 other end o! the bolt and engages the other lug I9 to secure the parts in adjusted position. Each slide I1 is made up oi side walls 2i connected by anV integral vcentrally disposed cross member 26 having a forwardv extension 21 in 50' which the lower channel I6 is formed. A cooperable removable section 28 is b olted to the extension 21 as indicated at 29 and provides the structure in which the upper channel I8 is formed. The side walls 2i have longitudinally extending guide ribs 30 projecting outwardly therefrom and slidably interiitting in guide-ways 3| formed in the side members 32 of a bracket designated generally at 33 and securely bolted as at 34 to the main frame plate 2 and 1. Flanged lugs 35 integral with the side members of the bracket engage fiush against and are bolted to abutments lugs 36 which may be formed integral with the main frame plate 2 and 1 (see Figures 2 and 5). Wear plates 31 and 38 may be interposed between the bracket 32 and the side walls and guide ribs of the slide (see Figure 6).

The central cross member 26 of each slide is provided with 'a vertical slot 40 extending up through the top thereof and intersected by longitudinal openings 4|formed in the cross member. A notched plate 42 is fitted down in the slot 40 and embraces an adjusting screw 43; The opposite sides of the plate engage the confronting faces of collars 44 integral with or suitably secured to the adjusting screw 43. The threaded portion 45 of the screw 43 is engaged with a nut or threaded bearing 46 formed integral with the bracket 33. To facilitate adjustment of the screws, the rearward end of each issquared or otherwise adapted as indicated at 41 to coact with a suitable tool. A nut 46 is threaded on each threaded portion 45`and secures it in adjusted position.

By adjusting each screw 43 the slide |1 interconnected therewith is moved longitudinally in its guides and in such manner as to adjust the associated roll in the roll plane or toward and away from its cooperable or companion roll. In this way the size of the roll pass is varied, and also provision is made for the taking up of wear as well as for the throwinginto and out of action of the rolls of any roll stand or rolling mill unit.

Each roll spindle has the end thereof remote from its roll projecting beyond its bearing housing and connected by a removable and universal cou- Illing 50 with the adjacent end of a drive shaft 5 I. Split collars 52 which have their sections detachably connected by bolts and nuts or the like embrace the end of each drive shaft 5| adjacent its coupling 50 and although normallyV maintaining the coupling assembled with its drive shaft and roll spindle also provides for the disconnec-J tion of the coupling upon its removal. Each drive shaft 5| is rotatably mounted in bearings 53 provided therefor in a gear box or casing 54 interconnected with and securely bolted to the main -A frame plate 2 and 1. Beveled gearing 55 connects each drive shaft 5| to a pinion shaft 56 journaled in bearings 51 proyided therefor in the gear box 54. Each pinion shaft 56 extends transversely of the main frame or housing at a point adjacent the periphery thereof. Pinions 60 are fixed on the pinion shafts 56 and mesh with a master gear 6|, the-hub of which is rotatably mounted on roller bearings 62 carried by the hub or annular central structure 63 of the mainframe or housing #2.

The master gear 6| of each rolling mill unit is driven from an` individual gear unit shown diagrammatically at 65 in Figure 2, the gear unit shaft being coupled to a drive line'shaft 66 connectedby beveled gearing 61 to a main driving shaft 68 which has a pinion 69 thereon meshing with and driving the master gear 6|.

In practice, the rolls being independently adjustable in their respective roll planes may be readily set to provide the desired pass opening and th's vary the reduction effected by any-set of rolls. This same feature provides the takeup required for'wear and makes it possible to throw in or out of action any particular roll stand or rolling unit. By removing any collar 52 the loose coupling element 50 may be moved outwardly out of engagement with the free end of its roll spindle Il, so that by removing the fastening means which holds the bracket 33 to the main frame plate, the bracket, its slide and the associated roll, roll spindle and bearing may be independently removed from the set. The rolls are also independently adjustable along their respective axes so as to facilitate alinement or symmetrical disposition of the members of each set of rolls with respect to their common plane. The driving means for the rolls is compactly and closely organized and while simple and durable in construction, is efficient in operation and insures rotation of the rolls of each set at the same speed.

While we have shown and described one construction in which the invention may be embodied, it is to be understood that various changes in the size, shape and arrangement of the parts may be made without departing from the spirit of the invention or the scope of thesubjoined claims.

'I'he invention claimed is:

1. A rolling mill comprising a single main housing having gear boxes extending laterally therefrom adjacent its periphery, a passage-way extending centrally through said housing for accommodation of material to be rolled, drive shafts carried by the gear boxes and extending toward the longitudinal axis of said passage-way and radially thereof, gearing within said housing and gear boxes for driving said shafts, a plurality of radial disposed rolls adapted for conjoint rolling action on material passing through said passage-way, means slidably interconnecting said rolls and the outside of said housing, said means rotatably supporting said rolls and providing for individual transverse and axial adjustment thereof while'maintaining said rolls with their rotational axis lying in a common plane and flexible driving connections between said rolls and said driving shafts, said means, rolls and flexible driving connections being positioned within the confines dened by the face of the housing and the common plane of the outer faces of said gear boxes.-

2. In a rolling mill having a housing for roll driving means and radially deposed rolls outside of said housing positioned for conjoint rolling action on material passing perpendicularly to and centrally through said housing, means for supporting said rolls and providing for individual adjustment thereof while maintaining said rolls with their rotational axis lying in a common plane comprising intermediate members.

slidably interconnected said housing for movement back and forth in one line of direction only, bearingmembers' slidably interconnected with one end of said intermediate members and positioned between vthe outer coniines of said intermediate members and the housing, the sliding movement of said bearing members being back and forth in one line of direction only, said latter line of direction being transverse of said former line of direction and spindles rotatably' supported against axial displacement by said bearing members, said spindles having one end iixedly supporting one of said rolls and the other end exibly connected with driving means.

3. 'I'he invention set forth in claim 2, characterized by single screw means between said intermediate members and said housing and single screw means between said intermediate mem- 5 bers and said bearing members whereby all of said members are adjusted relative to each other and to said housing.

4t The invention set forth in claim 2, characterized in that the intermediate members have at one end `a lower protruding jaw and a detachable piece providing a complementary upper protruding jaw secured to said lower jaw by screw means, said jaws sldably interconnecting with the bearing members.

KARL A. NYGREN.

JOHANNES A. ZSCHJESCI-IE.

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