WO2011076595A2

WO2011076595A2 - Compression rolling mill having a coupling sleeve guide unit

Info

Publication number: WO2011076595A2
Application number: PCT/EP2010/069435
Authority: WO
Inventors: Stefan Wendt; Frank MÖLLERING; Marcus PANTHÖFER; Bernd Zieser
Original assignee: Sms Siemag Ag
Priority date: 2009-12-23
Filing date: 2010-12-13
Publication date: 2011-06-30
Also published as: EP2516077B1; DE102009060238A1; EP2516077A2; JP2013515610A; CN102655957B; WO2011076595A3; JP5490921B2; CN102655957A

Abstract

The invention relates to a compression rolling mill for compressing a metal strand sideways, having a pair of compression rollers disposed having the center axes thereof vertical and that can be engaged against each other, supported within a roller stand and each connected to a rotary drive by means of coupling sleeves (27) and articulated shafts (29), characterized in that the coupling sleeves (27) are supported within the roller stand on tracks (16) between arbors (6, 6a) running horizontally.

Description

Rolling mill with a roller hit guiding unit

The invention relates to a compression roll for lateral compression of a metal strand with a pair of their central axes arranged vertically, against each other engagable edging rolls, which are mounted within a roll stand and are each connected via roller hits and drive shafts to a rotary drive. Such compression rolling mills are carried out to a considerable extent as vertical or upsetting Stauch with one or more crossheads or trusses on which the rotary drives of the rollers are mounted.

From EP 1 606 067 B1 an upsetting mill for hot operation is known, which comprises a pair with their central axes vertically arranged, mutually engageable rollers, which are connected by means of propeller shafts to at least one rotary drive. This compression roll mill is characterized by the fact that the rotary drive for the two rollers below the Hüttenflur- plane arranged stationary and is drivingly connected in each case with a stationary gear each with the propeller shaft. Starting from a rotary drive, which consists of a heavy electric motor, the driving force by means of a horizontally arranged, continuous and rotatably mounted drive shaft and beveled on both sides bevel gear stages len transferred to the two opposite the vertical at an acute angle Gelenkwellen- len, in turn their rotational movement in propeller shaft transducers via cardan shaft heads to the compression rollers. The known compression roll mill has the disadvantage that it is maintenance-intensive.

It is the object of the invention to improve an upset mill of the type mentioned so that it has a modular structure. According to the invention, this object is achieved in that the roller hits are stored between horizontally extending spars within the roll stand on roadways. By the invention, the required depth of the compression roll is optimized. The arrangement of a bevel gear stage as between between a drive motor and the compression roll provided gear allows a nested structure of the transmission and the propeller shaft, which is mounted between the bevel gear and the roller hit.

The compression roll mill according to the invention comprises a roll stand with two transverse heads, two upper, two middle and two lower bars, which are each held between the crossheads. The crossheads each receive at least one upsetting roll attachment, which comprises mechanical or hydraulic adjustment means; However, it may also include both mechanical and hydraulic adjusting means. The Walzenanstelleinrichtung acts on the compression roller set and exerts the rolling force.

Likewise, the crossheads at least each take a Balancierzylinder on which a balance, d. H. a virtually backlash distortion of the rolling device, allows and traversing movements, z. B. for the roll change performed.

The crossheads are connected by the spars, which absorb the forces from the rolling process in all three spatial directions. In addition, raceways are arranged on the spars, which carry the balancing crossbeams, the upset roll set and the compression roll finishing guide unit. The raceways may be inclined for particular applications, in particular down to the center of the compression roll mill. Likewise, the balance cylinders and the roll adjuster may be inclined for optimum power and motion transmission. The balancing trusses are connected to the balancing cylinders. For example, the Balanciertraversen be performed on the upper spars and positively connected to the compression roller set. During the compression roll change, the balancing crossbeams remain in the compression roll mill, so that only the compression rolls have to be exchanged.

The compression roller set is pressed by the roller adjustment to the rolling stock and exerts the rolling force. The upsetting roll is equipped with a downwardly directed roll neck which is positively connected to a roll hit in the upset die guide unit and thus transfers the torque from the gear to the roll via the hit. In this case, the positive connection is advantageously produced by a roller-side flat pin with a corresponding recess in the roller hit, which is preferably protected by wear plates. The compression roller set is guided over raceways on the upper spars. The corresponding guides on the compression rollers are preferably rotatable, thereby avoiding forcing on the bearings in which the compression rollers are mounted. The Stauchwalzentrefferführungseinheit is guided on tracks on the lower spars and can thus be installed as a single module in the compression roll mill. The corresponding guides on the upset pinch and hold device are also rotatable to avoid constraint in the bearings and at the junction between the stuffing roll and the device. This device remains when changing the compression roller in the compression roller and follows the adjusting movement of the compression roller through the positive connection between it and the compression roller. The joint between the upsetting roll and the roller hit guiding unit is preferably provided with a centering ring which allows the roller hit guiding unit to exactly follow the movement of the upsetting roll. Each of the roller guide units is connected via a drive shaft with length compensation in each case with a transmission which is arranged stationarily below the compression roll mill. The propeller shafts themselves are with a tool holder in the manner of a ring for assembly purposes, eg. B. by a C-hook equipped. In addition, they preferably have a locking the length compensation locking device, which also serves maintenance and mounting purposes.

The transmission is preferably designed in two stages with a bevel gear set and a spur gear. By the order and structural nesting of the gear stages, a substantial reduction in the required depth is achieved.

Each gearbox is connected via a shaft with a laterally arranged drive motor. This shaft can be rigid or designed as a PTO shaft. In this case, there is the advantage that the structural position of the drive motor can be variably adapted to the conditions on site. Each compression roller and its guide unit can be connected via a media chain to the required for the operation of media and electrical connections. Lubricating oils, hydraulic oil and electric power, which is required for the measuring devices connected to the compression roll mill, are preferably supplied via the media chain.

Advantageous developments of the invention will become apparent from the subclaims, the description and the drawings.

In an advantageous embodiment of the invention, the roller hits on guide units, in particular wings, which are mounted on or on the spars, transversely movable and oscillating stored. Preferably, the wings are respectively slidable or rolling on the spars within guide boxes or locks encompassing the spars.

Preferably, the wings are slidable over skids on sliding strips, which are mounted on the spars and allow a shift of the roller impact in the direction of the compression roller position. Also, the roller hits over chocks are stored with advantage between the bars.

The use of roller bearings and / or taper roller bearings ensures that the roller hits in the chocks can be rotated.

The same mobility that the compression rollers have at their upper ends relative to the spars is ensured in the region of the chocks by the fact that the guide rails are slidably mounted relative to the spars.

In constructive terms, it also proves to be advantageous if the roller hits are connected via a connecting means, in particular via a Hirth or feather key, with the propeller shafts. In this case, it can be provided that the roller hits receive the compression rollers in a form-fitting manner, in particular via roll necks formed as flat pins.

Preferably, the lower roll necks of the compression rolls are positioned over a centering ring in the roll hits.

To minimize the consequences of unavoidable wear, the roller hits pick up the lower roll necks via replaceable wear plates. An effective protection against the ingress of dirt into the Supporting the compression roll in the roll guide unit, ie in the region of the lower roll neck, provide protection devices, in particular a protective collar or a labyrinth arrangement.

The compression roll mill comprises a roll stand with two crossheads and at least two pairs of bars arranged between them, between which the upsetting rolls can be reciprocated according to the width of the metal strand to be crushed.

Here, the crossheads each take Walzenanstelleinrichtungen, each acting on one of the two compression rollers. In addition, the crossheads each have at least one balancing cylinder for pretensioning the rolling device and for carrying out traversing movements when changing the rolls.

The rotational movement of the compression rollers can be transmitted either directly from the connected via a synchronous shaft with a single drive motor transmission gears or driven via their own drive motor gearboxes on the propeller shafts. In a further alternative, the two propeller shafts are connected to the drive motor via a common transmission gear and a synchronizing shaft adjoining this.

The resolution of the compression roll mill in a plurality of individual modules resulting in improved maintenance and handling and a lower susceptibility to errors compared to the prior art. Constructive changes are easy to carry out. Essential to the invention is in particular the modular construction of the compression roll balancing, the compression rolls, the roller hit guiding unit and the main drive gear.

In summary, the advantages of the invention are that the compression roll mill is easier to maintain and easier to handle than a conventional conventional compression roll mill.

Compared with the concepts known from the prior art compression roll mill according to the invention is less susceptible to interference, and it has smaller individual modules, which have lower weights and a smaller overall depth.

The gearboxes arranged between the propeller shafts and the compression rollers each have an output side bevel gear, which is arranged above the drive side spur gear on an intermediate shaft. A propeller shaft flange is attached to the side of the bevel gear at the end of the output shaft.

At the ends of the output shafts hits of the propeller shafts are applied, which are connected to the propeller shaft flanges via a connecting means, in particular a toothing or a feather key. The hits of the propeller shafts are shrunk on the ends of the output shafts.

The transmissions are driven either by two separate drive motors or by a single common drive motor, the transmissions being connected via a combination of gear and comb drives and synchronous shafts.

The invention will be explained in more detail in an embodiment. Show it:

1 is a side view, partially in section, of an upsetting mill and

2 shows a cross-section of the compression roll mill in the region of a roll reference guide unit of one of the compression rolls along a section line II - II from FIG. 1, in an enlarged view. A compression roll mill (FIG. 1) comprises a roll stand or frame 1 Transverse heads 2, 3 and pairs of upper, middle and lower bars 4, 5 and 6. Between the pair of upper bars 4, the upper bearing housings 7, 8 are arranged by compression rollers 9, 10 respectively. Balancing trusses 1 1, 12 ensure that the compression rollers 9, 10 can be moved back and forth between the bars 4, 5 and 6 in accordance with the thickness of the metal strand to be crushed. The lower bearing housing 1 3, 14 of the compression rollers 9, 10 are arranged in the region between the two middle bars 5.

On the upper side of the upper spars 4 and the middle spars 5 or the lower spars 6 inclined tracks 15, 16 are mounted on the in known manner, the Balanciertraversen by Anzustelleinrichtungen 17, 18, 19 and 20 are moved, which laterally against the Balanciertraversen 1 1, 12 press and with these the bearing housing 13 and 14 and the compression rollers 9, 10 and the compression rollers 9, 10 mounted in them against the roll metal to be rolled. To set an exact position of the compression rollers 9, 10 and to avoid lots additional Balancierzylinder 21, 22 are arranged between the Anstell- which attack with their piston rods 23, 24 on the balancing cross bars 1 1, 12 and positioning accuracies of the Anzustelleinrichtungen 17th balance up to 20. The compression rollers 9, 10 are respectively provided with roll necks 25, 26 and roll hits 27, 28, via which they cooperate with propeller shafts 29, 30, which are connected, for example via feather keys with the roller hits 27, 28 and their drive torque to the compression rollers 9, 10th transfer. The propeller shafts 29, 30 are each equipped with length compensation means, e- they are also angle-adjustable over the joints, so that they can follow the positions occupied by the compression rollers 9, 10 corresponding to the width of the metal strand to be crushed. In addition, devices may be present on the propeller shafts 29, 30, which lock the length compensation if necessary. For mounting purposes, a ring may be attached to the drive shafts 29, 30. The propeller shafts 29, 30 are driven by two-stage gear 31, 32. These are in turn driven by rigid or articulated shafts 33, 34. Drive motors 35, 36 drive on the shafts 33, 34, whereby transmission gears (not shown) can be interposed between the drive motors 35, 36 and the shafts 33, 34.

The gear 31, 32 include, as shown in more detail by the transmission 32, each a drive side bevel gear 56, a driven side bevel gear 57, a drive side spur gear 58, a driven side spur gear 59, a Gelenk- shaft flange 60, an output shaft 61, an intermediate shaft 62nd and a drive shaft 63. The bevel gear 57 is disposed above the spur gear 58 on the intermediate shaft 62. Hits 64, 65 establish the drive connection between the ends of the output shafts 29, 30 with the drive shafts 29, 30. The hits 64, 65 are connected to the propeller shaft flanges 60 via a connecting means, in particular a serration or a feather key. Instead of using two drive motors 35, 36, a single drive motor can also be provided if its drive torque is transmitted to the two drive shafts 29, 30 via a corresponding combination of gear and / or comb roller drives and synchronous shafts. The hits 64, 65 can be shrunk onto the ends of the respective output shaft 61 to make the flange connection to the propeller shaft flanges 60.

Instead of using two drive motors 35, 36, the drive of both propeller shafts 29, 30 can also be realized by a single drive motor, if corresponding transmission gears, in particular pinion gears, and a synchronous shaft are provided.

The roll neck 25 (FIG. 2) of the compression roll 9 is mounted in the roll hit 27 via a wear plate 37. The wear plate 37 is screwed ben connected to the roller hit 27 and can be replaced when worn. In addition, the roll neck 25 is secured via a centering ring 38 in the roll hit 27.

Together with the roll neck 25, the roll hit 27 is rotatably mounted in a chock 41 via roller bearings 39 and tapered roller bearings 40. The roller hit 27 is sealed down over a raceway ring 42 relative to the chock 41. Guide rails 43, 44 allow the displacement of the chock 41 within the adjacent spars 6, 6a; In this case, the guide rails 43 are attached to the uprights 6, 6a, while the guide rail 44 is mounted circumferentially on the chock 41 on the outside. Here, the roadway 16 includes on its upper side a guide box 45, in which between strips 46, 47 a rocker 48 on skids 49, 49a can be moved. The rocker 48 comprises a main body 50 and an axle 51, via which the rocker 48 is fixedly connected to the chock 41.

To protect against the ingress of dirt, a sealing ring 52 and a further raceway ring 53 and a protective collar 54 are present on the upper side of the roller impact 27 at the transition to the chock 41. Another protective collar 55 is provided on the roll neck 25. Also on the underside of the roller impact 27, a sealing ring 52a is provided.

LIST OF REFERENCE NUMBERS

1 frame

2 crosshead

3 crosshead

4 Holm

5 spar

6 Holm

7 bearing housing

8 bearing housing

9 compression roller

10 upsetting roller

1 1 balance beam

12 balance beam

13 bearing housing

14 bearing housing

15 lane

16 lane

17 Starting device

18 setting device

19 adjusting device

20 setting device

21 balancers

22 balancers

23 piston rod

24 piston rod

25 roll necks

26 roll neck

27 roller hits

28 roller hits W

12

29 PTO shaft

30 PTO shaft

31 gears

32 gears

33 wave

34 wave

35 drive motor

36 drive motor

37 wear plate

38 centering ring

39 roller bearings

40 tapered roller bearings

41 chock

42 raceway ring

43 guide rail

44 guide rail

45 guide box

46 bar

47 bar

48 swingarm

49 skid

49a skid

50 basic body

51 axis

52 sealing ring

52a sealing ring

53 raceway ring

54 protective collar

55 protective collar

56 drive side bevel gear

57 output side bevel gear 58 drive-side spur gear

59 output side spur gear

60 cardan shaft flange

61 drive shaft

62 intermediate shaft

63 drive shaft

64 hits of the cardan shaft 29

65 hits of the cardan shaft 30

Claims

claims

Compression roll for lateral compression of a metal strand with a pair with their central axes arranged vertically, against each other adjustable compression rollers (9, 10) which are mounted within a roll stand and each roll impact (27, 28) and propeller shafts (29, 30) to a rotary drive ( 35, 36) are connected,

characterized,

that the roller hits (27, 28) between horizontally extending bars (6, 6a) are mounted within the roller stand on roadways (16).

Rolling mill according to claim 1,

characterized,

in that the roller hits (35, 36) are mounted transversely movably and oscillatingly via guide units, in particular rockers (48) which are mounted on or on the bars (6, 6a).

Rolling mill according to claim 2,

characterized,

in that the rockers (48) are slidable or rolling on the uprights (6, 6a) within respective guide boxes (45) or locks encompassing the spars (6, 6a).

Rolling mill according to claim 3,

characterized,

in that the rockers (48) are slidable via slide skids (49, 49a) on slide rails (46) which are mounted on the rails (6, 6a) and which allow a shift of the roller impact (27, 28) in the direction of the compression roller position.

Rolling mill according to one of claims 1 to 4,

characterized,

in that the roller hits (27, 28) are mounted via chocks (41) between the spars (6, 6a).

Rolling mill according to claim 5,

characterized,

in that the roller hits (27, 28) are mounted inside the chocks (41) via bearings, in particular roller bearings and taper roller bearings.

Rolling mill according to claim 5 or 6,

characterized,

that the chocks (41) via guide rails (43, 44) slidably relative to the spars (6, 6a) are mounted.

Rolling mill according to one of claims 1 to 7,

characterized,

in that the roller hits (27, 28) are connected to the drive shafts (29, 30) via a connection means, in particular via a toothing, in particular a serration, or a feather key.

Rolling mill according to one of claims 1 to 8,

characterized,

in that the roller hits (27, 28) receive the compression rollers (9, 10) in a form-fitting manner, in particular via roll necks (25, 26) designed as flat pins. 10. compression roll according to claim 9, characterized,

the lower roll necks (25, 26) of the compression rolls (9, 10) are positioned in the roll hits (27, 28) via a centering ring.

Rolling mill according to claim 9 or 10,

characterized,

in that the roller hits (27, 28) receive the lower roll necks (25, 26) via exchangeable wear plates (37).

Rolling mill according to one of claims 9 to 11,

characterized,

the lower roll necks (25, 26) are protected by protective devices, in particular a protective collar (38, 55) or a labyrinth arrangement, against the ingress of contaminants into their storage.

Rolling mill according to one of claims 1 to 12,

characterized,

that below the hut floor level a media chain is mounted, which is connected to the between the propeller shafts (29, 30) and the compression rollers (9, 10) arranged gears (31, 32) and to supply the roller hits (27, 28) and / or the compression rollers (9, 10) with the media required for the operation, in particular with a lubricant and with electrical voltage used.

Rolling mill according to claim 13,

characterized,

in that the gearboxes (31, 32) are designed in two stages with a bevel gear set (56, 57) and a spur gear set (58, 59). 15. Upset mill according to one of claims 1 to 14, characterized,

in that the roll stand comprises two transverse heads (2, 3) and at least two pairs of bars (4, 5, 6, 6a) between them, between which the upsetting rolls (9, 10) can be moved back and forth in accordance with the width of the metal strand to be crushed are.

16. compression roll according to claim 15,

characterized,

in that the crossheads (2, 3) each accommodate roll adjusters (17, 18, 19, 20) which each act on one of the two upsetting rolls (9, 10).

17. compression roll according to claim 15,

characterized,

in that the transverse heads (2, 3) each have at least one balancing cylinder (21, 22) for pretensioning the rolling device and for carrying out movements during roll changing.

18. Upset mill according to one of claims 1 to 17,

characterized,

in that the upsetting rollers (9, 10) are guided over raceways (15, 16) on the uprights (4, 6, 6a), the corresponding guides being designed to be rotatable on the compression rollers (9, 10).

19. Upset mill according to one of claims 1 to 16,

characterized,

in that guides of the compression rollers (9, 10) are rotatable with respect to the respective compression roller hit sliding and holding device.

20. compression roll according to claim 14,

characterized, that in each case the output-side bevel gear (57) is arranged above the drive-side spur gear (58) on an intermediate shaft (62) and a propeller shaft flange (60) is mounted laterally next to the bevel gear (57) at the end of an output shaft (61).

Rolling mill according to claim 20,

characterized,

that at the end of the output shafts (61) hits of the propeller shafts (29, 30) are applied, which are connected to the propeller shaft flanges (60) via a connecting means, in particular a toothing or a feather key.

Rolling mill according to claim 21,

characterized,

that the hits of the propeller shafts (29, 30) on the ends of the output shafts (61) shrunk.

Compression roll mill according to one of claims 14, 20, 21 or 22, characterized

in that the transmissions (31, 32) are driven by a single drive motor, being connected by a combination of gear and ridge gear drives and synchronizing shafts.

Rolling mill according to one of claims 20 to 23,

characterized,

that between the roller hits (27, 28) and the propeller shaft flanges (60) is arranged in each case a propeller shaft (29, 30) with a length compensation, with the length compensation on demand blocking device and with a required ring for mounting purposes. 25. Upset mill according to one of claims 20 to 24, characterized,

a rigid shaft (33, 34) with couplings or one articulated shaft with means for length compensation is respectively arranged between the drive motors (35, 36) and the respectively associated drive shafts (63).