US3563077A - Rolling mill for rolling bushes and the like - Google Patents

Rolling mill for rolling bushes and the like Download PDF

Info

Publication number: US3563077A
Authority: US; United States
Prior art keywords: roll; bearing; rolling; frame; rolling mill
Prior art date: 1968-05-15
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired - Lifetime

Application number

US804783A

Other languages

English (en)

Inventor

Wolfgang Backe

Otto Ulrych

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

RHEINSTAHL WAGNER WERKZEUGMASC

Original Assignee

RHEINSTAHL WAGNER WERKZEUGMASC

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1968-05-15

Filing date

1969-03-06

Publication date

1971-02-16

1969-03-06 Application filed by RHEINSTAHL WAGNER WERKZEUGMASC filed Critical RHEINSTAHL WAGNER WERKZEUGMASC

1971-02-16 Application granted granted Critical

1971-02-16 Publication of US3563077A publication Critical patent/US3563077A/en

1988-02-16 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Images

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length

Definitions

a mill for rolling annular workpieces such as bushes and the like, whose axial lengths are large relative to their diameters, has two superposed relatively adjustable horizontally oriented rolls supported at opposite ends, with the larger diameter upper roll being driven and the smaller diameter lower roll being axially displaceable.
Respective bearings rotatably support each end of each roll, and a drive is connected to one end of the upper roll.
a support frame is closed above and beneath the rolls and encloses the bearings.
the bearing at the drive end of the upper roll is fixedly mounted in the frame, and a displaceable bearing block on the frame engages the top and sides of the bearing at the other end of the upper roll and is vertically adjustable.
a carriage is mounted on the frame for adjustment relative to the upper roll and carries the bearings at the ends of the lower roll.
Rolling mills for annular workpieces normally have two working rolls which can be adjusted relatively to each other, usually one of these rolls being driven. In the most common design, the orientation of the roll axes is vertical.
the larger diameter or disk roll is driven, and is mounted in stationary position, usually in an overhung arrangement.
the smaller diameter roll, or roll mandrel can be adjusted relative to the disk roll and is supported, during the rolling operation, at its free end by means of a counter holder which can be either folded down or lifted to provide for insertion or removal of the workpiece.
Rolling mills of this type are not particularly suitable for the economical rolling of thin-walled workpieces whose axial lengths are large relative to their diameters, such as, for example, bushes and the like.
the roll bearings for the forces appearing in annular workpieces whose axial lengths are large relative to their diameters, and which have low wall thicknesses, are not stiff enough, so that the rolled annular workpieces deviate considerably from the ideal cylindrical jacket form. Therefore, they require excessive machining allowances for metal removal.
the necessity of lifting the workpiece over the rolled mandrel, during loading and unloading of the rolling mill makes automation of the change of workpieces, which is necessary for optimum profitability, difficult.
This invention relates to a rolling mill for rolling annular workpieces whose axial lengths are large relative to their diameters and, more particularly, to a novel and improved rolling mill for this purpose which is free of the disadvantages of known prior art rolling mills, used for this purpose, and which has a high productivity rate and is particularly adapted to automatic feeding and removal of the workpieces to be rolled.
the invention provides for the economical production of bushes and similar annular workpieces with a low capital expenditure. This is possible because of a bilateral support of the rolls and a rigid overall structure of the machine, so that even workpieces of great axial length can be rolled with minimum deviations in form and thus minimum machining allowances. Furthermore, replacement or changing of the disk roll, for rolling different workpiece forms, can be effected with a minimum expenditure of time and the changing of the workpieces can be automated using simple and safe means.
the rolling mill includes two superposed and mutually adjustable rolls, which are supported on opposite ends and oriented horizonally.
the larger diameter upper or disk roll can be driven, and the smaller diameter bottom roll, or roll mandrel, can be displaced in an axial direction.
the rolling mill in accordance with the invention is characterized by a frame which is closed both above and below the rolls, and encloses the bearings at opposite ends of both rolls.
the bearing on the driving end of the top roll is fixedly mounted, and the bearing block embraces the other bearing of the top roll engaging the top and both sides thereof, and this bearing block is vertically displaceable.
a carriage supports the bearings of the bottom roll, and can be displaced relative to the top roll and adjusted relative to the latter.
the bearing block is made adjustable in its vertical position, with respect to the bearing of the top roll, by means of a threaded adjusting means or the like.
the inside Width is greater than the maximum diameter of the top roll.
the top roll in accordance with the invention and in a known manner, comprises an inner part carrying the bearing pin and an annular outer part secured on the inner part and connected non-rotatably therewith.
the rolling surface of the outer part of the top roll consists of several annular parts.
the working surface of the top roll can be adapted easily to the axial length of the workpiece to be rolled, so that space is provided, during the rolling of annular workpieces having smaller axial lengths, to bring the displaceable bearing of the smaller diameter lower roll as close as possible to the workpiece, when an axially shorter lower roll mandrel is to be used.
the outer part can be removed from the inner part over the bearing, remaining on the bearing pin, after disengagement of the bearing block upwardly from the bearing.
An object of the invention is to provide an improved rolling mill for rolling annular workpieces, such as bushes and the like, whose axial lengths are large relative to their diameters.
Another object of the invention is to provide such a rolling mill having two superposed relatively adjustable horizontally oriented rolls supported at opposite ends.
a further object of the invention is to provide such a rolling mill in which the larger diameter upper roll is driven and the smaller diameter lower roll is axially displaceable.
Another object of the invention is to provide such a rolling mill including respective bearings rotatably supporting each end of each roll, with a support frame closed above and beneath the rolls and enclosing the bearings.
a further object of the invention is to provide such a rolling mill including a drive connected to one end of the upper roll with the bearing at the drive end of the upper roll being fixedly mounted in the frame.
Another object of the invention is to provide a displaceable bearing block on the frame and engaging the top and sides of the bearing at the other end of the upper roll.
a further object of the invention is to provide a carriage mounted on the frame for displacement relative to the upper roll and carrying the bearings at the ends of the lower roll.
a further object of the invention is to provide means for adjusting this carriage relative to the upper roll.
Yet another object of the invention is to provide such a rolling mill in which the upper roll has a rolling surface which is adjustable as to axial extent, and which is formed on an outer annular part which can be removed over an associated bearing.
FIG. 1 is a vertical sectional view through the rolling mill taken along the line A-B of FIG. 2;
FIG. 2 is a vertical sectional view through the rolling mill taken along the line C-D of FIG. 1;
FIG. 3 is a partial vertical sectional view, on an enlarged scale, of the rolling mill and taken along the line G-H of FIG. 1;
FIG. 4 is a horizontal sectional view of the rolling mill taken along the line E-F of FIG. 1.
top roll 1 which is referred to as the disk roll
bottom roll 2 which is referred to as the roll mandrel
Bearing pin 4 of top roll 1 is connected with the drive (not shown) for the rolling mill, and is mounted in a bearing bush 6 which is rigidly connected with machine frame 3.
Bearing pin 4 is arranged to rotate with roll 1, and is rotatable in anti-friction bearings or the like in bearing bush 5, while being restrained againstaxial displacement relative to bearing bush 5.
top roll 1 The other bearing pin 6 of top roll 1 is rotatably mounted in a bearing bush 7, while being fixed against axial displacement therein, and bearing bush 7 is embraced on its top and on both sides by a bearing block 8.
Bearing bush 7 is secured against rotation and axial displacement relative to hearing block 8 by suitable means, which have not been specifically illustrated, for example by a pin or the like.
a guide rod 12 is secured to bearing block 8, and comprises a tubular intermediate portion and two end pieces.
Guide rod 12 is guided in a guide sleeve 13 secured in machine frame 8.
Bearing block 8 is adjustable in height by means of a nut 14 threadedly engaged with a thread on guide rod 12, this nut bearing, in the lowermost illustrated position of bearing block 8, on the upper end face of guide sleeve 13.
a lock nut 15 which can be screwed onto the upper end of guide sleeve 13
bearing block 8 can be rigidly braced, relative to machine frames 3, through guide rod 12, nut 14 and guide sleeve 13, so as to be able to absorb upwardly directed force components.
Top roll 1 comprises an inner part having the bearing pins 4 and 6, a sleeve 16, rings 17 and 18 and a flange 19.
Sleeve 16 can be secured on the inner part and connected therewith by suitable means, which have not been shown, such as adjusting springs and screws, so as to be secured against rotation and axial displacement relative to the inner part.
the inner diameter of sleeve 16 is greater than the outer diameter of bearing bush 7.
Rings 17 and 18, whose outer circumferential surfaces form the rolling surface of top roll 1, are centered on sleeve 16 by suitable means which have not been shown, such as adjusting springs and the like, and are connected non-rotatably with sleeve 16 and secured against axial displacement relative thereto by a collar on sleeve 16 and a flange 19 which is connected with this collar by suitable bolts or screws (not shown).
the maximum diameter of rings 17 and 18 is smaller than the inside width of recess 9 of machine frame 3, which recess is exposed when bearing block 8 is displaced upwardly.
Roll carriage 20 having guide ribs 21, 22, 23 and 24 engageable with guide faces of the machine frame, as best seen in FIG. 4.
Carriage 20 may be displaced vertically of machine frame 3 by hydraulic actuators including cylinders 25 and 26, secured on machine frame 3, and respective piston rods 27 and 28, connected to roll carriage 20.
the smaller diameter bottom roll 2 is journaled at the upper part of roll carriage 20.
Roll 2 has one conical end 29 engaged in a flange bushing 31 which is secured in bearing bush 32 against rotation and axial displacement.
Bush 32 is rotatably mounted in a bearing block 35 by means of anti-friction bearings 33 and 34, and is secured against axial displacement relative to bearing block 35.
the conical end 30 at the opposite end of roll 2 is seated in a flanged bushing 36 and has a threaded extension threaded into bushing 36.
Bushing 36 is secured against rotation and axial displacement in a bearing bush 37 which is rotatably mounted in a bearing block 40 by means of anti-friction bearings 38 and 39 designed for absorbing both longitudinal and transverse forces.
Bearing block 40 is designed as a carriage which can be displaced in the longitudinal or axial direction of bottom roll 2 on guides 41 and 42 of roll carriage 20, as best seen in FIG. 4. Such displacement can be effected by a yoke 43, fixedly connected with bearing block 40, and on which act the piston rods 44 and 45 associated with respective cylinders 46 and 47 secured on roll carriage 20, the pistons and cylinders serving as hydraulic actuators.
a centering arm 48 is pivotally mounted in the upper part of machine frame 3, as best seen in FIG. 2, and its free end rotatably supports a centering roller 49. Pivotal movement of centering arm 48 is effected by a hydraulic actuator 50, mounted on frame 3, through the medium of levers or the like which have not been shown.
a hydraulic actuator 50 mounted on frame 3, through the medium of levers or the like which have not been shown.
devices passing through lateral openings of roll carriage 20 including a device 51 for the automatic feed of annular workpieces 52, a device 53 for removal of the finished workpieces, and means for disconnection of the feed, which is effected by a scanning roller 54 when the desired diameter of the annular workpiece has been attained.
bearing block 40 By supplying pressure fluid in the opposite direction to hydraulic cylinders 46 and 47, bearing block 40, and with this hearing block bottom roll 2, is displaced again to the left until conical end 29 of bottom roll 2 again bears on the corresponding bearing surface of flanged bushing 31. During this movement, bottom roll 2 penetrates through the opening in workpiece blank 52.
Top roll 1 is then rotated by its drive and roll carriage is pushed upwardly by supply of pressure fluid to hydraulic cylinders and 26. As soon as contact is attained between top roll 1, workpiece blank 52 and bottom roll 2, workpiece blank 52 and bottom roll 2 are set into rotation. With continuous upward displacement of roll carriage 20, workpiece blank 52 is rolled to the finished bush-shaped ring with a reduction of the wall thickness and an increase in diameter.
centering arm 50 By supplying hydraulic fluid to actuator 50, centering arm 50 is shifted so that centering roller 59 contacts the outer circumferential surface of the annular workpiece 52 being rolled and, with a corresponding increase of the diameter of the workpiece, effects a steady and centric run of workpiece 52 with a corresponding retraction of centering roller 49.
flange 19 is again connected with sleeve 16, hearing block 8 and guide rod 12 are lowered, and lock nut 15 is re-tightened.
the rolling mill is thus again relay for work.
sleeve 16 of top roll 1 can be disassembled over bearing bush 7 and replaced, if necessary.
narrower workpieces are to be rolled, for example, those whose axial length corresponds to the axial width of ring 17, only ring 18 is disassembled in the abovedescribed manner, and flange 19 is used to secure ring 17 against axial displacement "by means of correspondingly shorter screws or bolts.
Bottom roll 2 is disconnected by threading the threaded extension of its conical end 30 out of flanged bushing 36 and replacing bottom roll 2 by a .bottom roll having a correspondingly axially shorter cylindrical portion.
conical end 29 of the axially shorter bottom roll is made to bear on the corresponding bearing surface of flanged bushing 31.
bearing block 40 must be displaced to the left relative to the illustrated position by means of the hydraulic actuators including the cylinders 46 and 47'.
top roll 1 whose inner part having the bearing pins 4 and 6 can be dimensioned appropriately without difficulty, maintenance of the original hearing spacing offers no disadvantages for the precision of the workpiece to be rolled.
top roll 1,. and the easy exchanging of bottom roll 2 for a roll with different dimensions, using the minimum bearing spacing offers advantages not only for the exact rolling of bushes of different axial length. It also permits changing the rolling mill with a minimum of tooling costs and in a very short time, from rolling rings with the rectangular cross section to the rolling of rings with an outer profile, with an inner profile, or with an outer profile and an inner profile. It is therefore further possible to manufacture small lots of annular workpieces of different dimensions and cross sectional forms in a highly economical way.
a rolling mill for rolling annular workpieces, such as bushes and the like, whose axial lengths are large relative to their diameters, and having two superposed relatively adjustable horizontally oriented rolls supported at opposite ends, with the larger diameter upper roll being driven and the smaller diameter lower roll being axially displaceable: the improvement comprising, in combination, respective bearings rotatably supporting each end of each roll; a drive connected to one end of said upper roll; a support frame closed above and beneath said rolls and enclosing said bearings; the hearing at one end of said upper roll being fixedly mounted in said frame; a displaceable bearing block on said frame and engaging the bearing at the other end of said upper roll; and a carriage mounted on said frame for displacement relative to said upper roll and carrying the bearings at the ends of said lower roll.
said top roll comprises an inner part having bearing pins engaged in respective bearings at the opposite ends of said top roll; and an annular outer part secured to said inner part and rotatable therewith.
the hearing at one end of said lower roll includes a first bearing bushing having a conical recess receiving a conical first end of said lower roll; the bearing at the opposite end of said lower roll including a second bearing bushing having a conical recess receiving a second conical end of said lower roll and internally threaded for engagement with an externally threaded extension of said second conical end of said lower roll.

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Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Rolling Contact Bearings (AREA)

US804783A 1968-05-15 1969-03-06 Rolling mill for rolling bushes and the like Expired - Lifetime US3563077A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE1752361A DE1752361C3 (de)	1968-05-15	1968-05-15	Walzwerk zum Walzen von büchsenförmigen Werkstücken

Publications (1)

Publication Number	Publication Date
US3563077A true US3563077A (en)	1971-02-16

Family

ID=5692751

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
US804783A Expired - Lifetime US3563077A (en)	1968-05-15	1969-03-06	Rolling mill for rolling bushes and the like

Country Status (3)

Country	Link
US (1)	US3563077A (de)
DE (1)	DE1752361C3 (de)
SE (1)	SE335709B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2185462A1 (de) *	1972-05-24	1974-01-04	Oleodinamica Donzelli Beretta
US6473981B2 (en)	2001-02-13	2002-11-05	Victaulic Company Of America	Diameter indicator for use with groove forming tools
US20030226387A1 (en) *	2002-04-16	2003-12-11	Dole Douglas R.	Orbiting roller groover for pipe
US20050178179A1 (en) *	2004-02-12	2005-08-18	Victaulic Company Of America	Power or manually operated pipe grooving tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2330477A1 (fr) *	1975-11-06	1977-06-03	Roulements Soc Nouvelle	Dispositif de roulage de bagues de roulement
DE3533680A1 (de) *	1985-09-21	1987-03-26	Kieserling & Albrecht	Felgenprofilieranlage

1968
- 1968-05-15 DE DE1752361A patent/DE1752361C3/de not_active Expired
1969
- 1969-03-06 US US804783A patent/US3563077A/en not_active Expired - Lifetime
- 1969-05-16 SE SE06986/69A patent/SE335709B/xx unknown

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2185462A1 (de) *	1972-05-24	1974-01-04	Oleodinamica Donzelli Beretta
US6473981B2 (en)	2001-02-13	2002-11-05	Victaulic Company Of America	Diameter indicator for use with groove forming tools
US20030226387A1 (en) *	2002-04-16	2003-12-11	Dole Douglas R.	Orbiting roller groover for pipe
US6935152B2 (en)	2002-04-16	2005-08-30	Victaulic Company Of America	Orbiting roller groover for pipe
US20050178179A1 (en) *	2004-02-12	2005-08-18	Victaulic Company Of America	Power or manually operated pipe grooving tool
US6993949B2 (en)	2004-02-12	2006-02-07	Victaulic Company	Power or manually operated pipe grooving tool

Also Published As

Publication number	Publication date
SE335709B (de)	1971-06-07
DE1752361A1 (de)	1971-05-19
DE1752361B2 (de)	1977-08-18
DE1752361C3 (de)	1978-04-13

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