CN1184721A - Steel rolling mill - Google Patents

Abstract

The rolling mill is characterized by that bearing side of the roller shaft is assembled with the frame of reducing motor; the output axis of the reducing motor and roller are connected by spline on the same central line respectively. In addition, the frame of reducing motor is assembled on bearing side of supporting roll shaft; the output axis of the reducing motor and supporting roller are connected on the same central line within the rolling range of the roller.

Description

Rolling mill

The present invention relates to a kind of rolling mill, its objective is: when the roll seam that requires than broad and when 2 sections rolling mills are also used as 4 sections rolling mills, can use universal joint, nor must consider torsion angle of roll mandrel etc., and can in big thickness range, be rolled metal material.

Always, in the time will enlarging the adjusting range of roll seam, be output shaft and roll mandrel joining behind coupling bar and universal joint (see Japan Patent: special permission discloses clear 63-97305 number) with gear motor.

In addition, applicant is proposing a kind of output shaft and roll mandrel joining rolling mill (see Japan Patent: special permission is openly put down into 6-268910 number) on same center line with gear motor before this.

According at present many rolling mills, used by connecting mode that coupling bar and universal joint constituted, for reducing by coupling bar and the formed angle of inclination of roll mandrel, when 2 sections rolling mills are also used as 4 sections rolling mills, be the lengthening coupling bar, the interval that increases universal joint simultaneously.In addition, on same rolling mill, when the excursion of the thickness of wanting rolling goods broadens, also there is the length that must increase coupling bar, with this problem of angle that reduces coupling bar according to the excursion of products thickness.

In addition, on the rolling mill that coupling bar is housed, also have following all problems: the effect by driving torque can increase torsion angle, so when material is nipped roll, the unsettled velocity interval of when initial velocity, can coming out; And reduce above-mentioned torsion angle and when using firmly the coupling bar of some, can cause the maximization of device and the rising of expense again when counter, certainly, this is essential again further to increase torque; Or the like.

The present invention by on the part that on roll, needs most torque-connection part-power transfering part between output shaft and the roll is set in the rolling width of cloth, solve the above-mentioned problem that always exists, stability during with the realization initial velocity, simultaneously can also needn't consider the problems such as gap size of the windup-degree and the joint of coupling bar, so transmit necessary torque and can put in order.

In the present invention, the operation of other except that the adjusting of roll seam, the same with on the existing rolling mill.Because the rotation of roll is to be subjected to the control of motor speed, and because rolling mill can make the revolution of its motor output shaft often be consistent on performance, so can consider the inconsistent problem of rotating.

That is, the feature of the rolling mill among the present invention is that output shaft and the roll that drives roll linked in the medium pore of roll.In addition, the feature of each example of the present invention is respectively: the coupled position between output shaft and the roll is set in the medium pore of the rolling mill in the rolling width of cloth of roll; Coupled position between output shaft and the roll is set in the medium pore of the rolling mill in the rolling width of cloth of roll, and can axially regulates; The fixing frame of gear motor on a side of the bearing of back up roll links along same center line the output shaft and the back up roll of gear motor in the rolling width of cloth of roll; Each output shaft of gear motor and the coupled position between the roll are equidistant or non-equidistant apart from the center of roll; The output shaft of the driving roll of upper and lower inserts in the medium pore of roll from different mutually directions, makes it to obtain respectively to connect.

The existing general rolling mill that is using 16, as shown in Figure 8, its roller gear seat 17 links with axle 27, the 27a of roll 20,20a behind the universal joint 19 of coupling bar 18,18a, 19a, makes it like this to drive.According to such constituted mode, transmit universal joint 19, the 19a of the driving force of roll 20,20a, by all being 1: 1 gear ratio up and down, roll 20,20a are rotated.But when being separated with the rolling stock 21 that is being rolled mutually between roll 20,20a, the gearratio that can not guarantee the circumferential rotating speed of roll 20,20a is 1: 1.Its reason is, improves the precision of the diameter of roll 20,20a in any case, top and bottom rolls with and its rolling stock of following mutually 21 between coefficient of friction can not be determined value yet.For example, the position (L of (neutral point) of the X-Y line among Fig. 7 (a) ₁: L ₂) be frictional equalization point.At this moment, the X among Fig. 7 (a) ₁-Y ₁Line has represented that the effect owing to friction has obtained the situation of balance.

On above-mentioned existing rolling mill 16, the rotation of motor 22 is slowed down by gear 23,24 earlier, is delivered on coupling bar 18, the 18a by gear 25,26 again, roll 20,20a is rotated, thereby material 21 is rolled.

Therefore, if rolling thick material 21, because as shown in arrow 29 like that upwards the lifting of roll 20 meetings so that nip material 21, so lift part corresponding to going up of roll 20, can make coupling bar 18,18a produce inclination.

Therefore, for reducing this inclination angle, just must prolong the length of this coupling bar 18,18a.

That is, on the rolling mill of existing this roller gear seat of the employing mode of using,, can know that then the torque meeting that top and bottom rolls is rotated is very different if the torque detection device is set in the suitable place of the output shaft of roller gear seat.

In addition, when rolling stock is thicker (for example, the ratio of the diameter of roll and material thickness is 100: 1-10: 1), shown in the X-Y line among Fig. 7 (a) like that, by the inclination of the neutral position when the material deformation, can absorb the circumferential speed ratio of (elimination) roll.But when the rolling stock attenuation, can not all absorb the circumferential speed ratio of (elimination) roll, so on the opposite side of 49 of the roller gear seat common transmission of torque, can be subjected to the effect of the contact pressure of gear by the angle of inclination of X-Y line.At this moment, although to folk prescription to being rolled, the roller gear seat also can produce wearing and tearing on the two sides of its gear.

In addition, when actual being rolled, be 1: 1 although make the drive ratio of roll by the roller gear seat, such bending or dipping and heaving of producing that the rolling stock that is positioned at the roll outlet side also can be shown in Fig. 7 (b).

But, when rolling so thin rolling stock 21, consequently can very big differential torque be arranged the transmission of breaker roll pinion stand frequently when also wanting at 500: 1 when big of the thickness of the diameter of roll and rolling stock 21.Above-mentioned such problem can be at leave a trace on the metal surface of rolling mistake (interference pattern).

In addition, shown in Fig. 7 (c), occasion at the banded rolling stock of rolling width smaller (for example being that 5～10mm is wide), when the axle of top and bottom rolls and the output shaft of motor link when following, if connection part C is being separated with rolling P, then the collimation of top and bottom rolls will worsen, thereby may reduce rolling accuracy.

In contrast, as if in the present invention like this,, just can reduce effect, thereby can guarantee good rolling accuracy the harmful external force of the collimation of top and bottom rolls by connection part being arranged on rolling.

Output shaft in the present invention and the connection between the roll have more than the splined that is limited to as shown in Figure 5, also can consider by to be arranged on its section on the roll be polygonal medium pores such as quadrangle or hexagon with output shaft between connect form.The main points of this connection are as long as obtain constraint on peripheral direction, and to allow to exist on direction of principal axis to slide.

In addition, using like that, when prolonging the length of coupling bar, having the circumferential speed difference effect of mitigation in time and slowly that makes top and bottom rolls by universal joint as existing institute.But in the occasion of the rolling stock of rolling long size, when the torsion angle of coupling bar arrives its threshold value, then finally can force roll to produce the circumferential speed difference and correction rate poor.Therefore consequently, there is not the effect that only makes frequency (interferences) lengthening, and only has the effect that makes with the corresponding angle θ minimizing of variable quantity in the gap up and down of roll.

In the present invention, be with the bearing fixing of the frame of gear motor and roll together.But because key issue is that so the arrangement platform of gear motor also can for example be set on the bearing of roll, its effect is the same as long as gear motor can carry out same parallel moving with roll.

That is,, because the output shaft and the roll of gear motor linked,, and needn't consider problem such as torsion angle in the rolling width of cloth of roll so the transmission of torque is just very smooth according to the present invention; Simultaneously, owing to do not need to use coupling bar and universal joint, so also have generally many effects such as compactness.

In addition, even when the adjustable range of roll seam is big, because roll can carry out lifting just like an integral body with gear motor the samely, so no matter the size of regulating the gap how, can not produce discomfort on the connection part of driving force; And, when making rolling stock produce big plastic deformation, neither having also suitable shearing force, can not occur making goods produce the situation of distortion owing to the rolling rate in the table of goods is unequal yet.

In the present invention owing to will link in the medium pore in the rolling width of cloth of roll between the output shaft of gear motor and the roll, so driving force can be delivered to the position that needs most torque on the roll near.On the rolling mill of the big torque of needs, be the output shaft that on the two ends of roll, connects CD-ROM drive motor.

Fig. 1 is with the front view behind a part of section of one embodiment of the present of invention.

Fig. 2 is the front view after similarly a part of section, the part of the embodiment of multistage rolling mill being omitted.

Fig. 3 is similarly will be at the front view behind a part of section of the embodiment that is connected with gear motor on the both sides of roll.

Fig. 4 is similarly with the front view behind the part omission of another embodiment, a part of section.

Fig. 5 has shown the driving shaft of the same gear motor and the sectional view of the connection part between the roll.

Fig. 6 is similarly with the front view behind a part of section of other another embodiment.

Fig. 7: (a) for similarly having shown the key diagram of feature of the present invention; (b) be rolling key diagram when bad; (c) be the key diagram of roll when not parallel.

Fig. 8 is with the front view behind a part of section of existing rolling mill.

Below, according to Fig. 1 embodiments of the invention are described.That is: roll 1,1a are erected on the stand 3 of rolling mill; Simultaneously, output shaft 5, the spline tooth 8 of 5a, the 8a of gear motor 4,4a will be fixed on, central portion direction from the side of roll mandrel 2,2a toward roll 1,1a is inserted into the medium pore of roll 1,1a, make it with the medium pore that is arranged on roll 1,1a in spline 7 mutually meshing.On the bearing 6 of above-mentioned roll mandrel 2,2a, 6a, fixing above-mentioned gear motor 4, the frame 14 of 4a, 14a.Symbol 9 among Fig. 1,9a are adjustment screw.

In the above-described embodiments, when the start and deceleration horse states 4, during 4a, then through output shaft 5, the 5a of gear motor, roll 1,1a just rotate, and rolling stock 21 is rolled.In addition, in the time will adjusting the roll seam, as long as, just can make roll 1,1,1a and gear motor 4,4a carry out lifting integrally, thereby can freely regulate the gap of roll shop building by rotation adjustment screw 9,9a.Therefore, the output shaft 5 of gear motor 4,4a, 5a and roll 1,1a are always keeping same coupled situation on same center line, thereby can carry out the rolling operation of stable continuous.In above-mentioned, though mounting disc 10, the 10a of gear motor 4,4a are on the bearing 6 that is fixed on roll 1,1a with bolt etc., the 6a, to the concrete form of this fixed structure and unrestricted.

In the embodiment shown in Figure 2, on the inboard of back up roll 11,11a every roll 12,12a are housed; Be located at the spline 13 in the medium pore of above-mentioned back up roll 11,11a and be located at the output shaft 5 of gear motor 4,4a, spend strong tooth 8, the 8a on the 5a links then.

Therefore, even every the occasion that roll 12,12a are housed, also coupled on same center line between the output shaft 5 of gear motor 4,4a, 5a and back up roll 11, the 11a, so on back up roll 11,11a, do not have ill effect naturally, and the rolling operation of rolling stock 21 do not had bad influence yet.

In above-mentioned, because back up roll 11,11a and gear motor 4,4a can carry out lifting simultaneously integrally, so no matter whether every roll 12,12a are housed, can on output shaft 5,5a and the back up roll 11 of gear motor 4,4a, connection part between the 11a, not produce uncomfortable, thereby can carry out the continuous rolling operation of high-quality.

In embodiments of the invention shown in Figure 3, insert gear motor 4, the output shaft 5 of 4a, the spline tooth 8 of 5a, 8a from the both sides of roll 1,1a, the spline 7 that makes it and be arranged in the medium pore of roll 1,1a links.In this embodiment, though roll 1,1a by 2 gear motors 4,4a was driving, because gear motor 4,4a can automatically adjust velocity of rotation on its performance, so can't be to gear motor 4, the additional uncomfortable active force of 4a.

Roll 1 among this embodiment, the driving situation of 1a are because the same with among the 1st embodiment, so omit its explanation herein.

In embodiments of the invention shown in Figure 4, at the spline tooth 8 of the output shaft 5 that connects gear motor 4 with when being arranged on spline 7 in the medium pore of roll 1, be with the bolt warp between the bearing 6 of the mounting disc 10 of gear motor 4 and roll 1 bed course 15 and fixing.Therefore, by changing the thickness of bed course 15, perhaps, just can change coupled position by removing this bed course 15.

For example, coupled position can be adjusted to the central part of roll 1; Or be adjusted to a little a side away from gear motor 4, or the like.

In the above embodiments 1 to embodiment 3, spline tooth 8, the 8a of output shaft 5,5a and be arranged on connection between the spline 7 or 13 in the medium pore of roll 1,1a is to carry out on the central portion of roll 1,1a.But during the structure in the employing present embodiment, for this coupled position is on the appropriate location in the rolling width of cloth of roll, this coupled position can be located on the central portion of roll 1,1a, also can make its axially toward a little away from or it is moved axially near gear motor 4,4 craftsman one side.

In embodiments of the invention shown in Figure 6, the spline tooth 8 of the output shaft 5 of gear motor 4 left (Fig. 6) from roll 1 is inserted along the direction shown in the arrow 28, and the spline 7 that the spline tooth 8 of output shaft 5 is arranged in the medium pore of roll 1 links near the central portion of roll 1; In addition, the spline tooth 8a of the output shaft 5a of gear motor 4a is inserted along the direction shown in the arrow 29 from roll 1a right-hand (Fig. 6), the spline that makes it and be arranged in the medium pore of roll 1a links near the central authorities of roll 1a.In this embodiment, for the position that do not make gear motor 4,4a is overlap condition up and down, output shaft 5,5a are being inserted from opposite direction.So when gear motor is installed, just have the advantage that can be subjected to the restriction in place less.

Lift a practical example below: the external diameter of roll is 600mm; The power output of each gear motor 4 is respectively 20 horsepowers; To thickness is 40mm, and width is 100mm, and length is that the aluminum alloy plate materials of 300mm is rolled.At this moment, the amount of rolling of establishing each mill train is 3mm, be rolled down to always 10mm thick till.

The amount of rolling of above-mentioned the 1st mill train is 3/40ths, promptly about attenuate 7.5%; The amount of rolling of the 2nd mill train is 3/37ths, promptly about attenuate 8.1%; The amount of rolling of last mill train is 3/23rds, promptly about attenuate 30%.As mentioned above, even be the rolling stock of 40mm when being rolled down to till the 10mm always, can not produce the dipping and heaving distortion on the goods with thickness yet.

Claims (7)

1. rolling mill, it is characterized by: the output shaft and the roll that will drive roll link in the medium pore of roll.

2. one kind as the described rolling mill of claim 1, it is characterized by: the coupled position between output shaft and the roll is arranged in the medium pore in the rolling width of cloth of roll.

3. one kind as the described rolling mill of claim 1, it is characterized by: the coupled position between output shaft and the roll is arranged in the medium pore in the rolling width of cloth of roll, and can axially regulates.

4. rolling mill is characterized by: the fixing frame of gear motor on a side of the bearing of back up roll; The output shaft and the back up roll of gear motor are linked in the rolling width of cloth of roll along same center line.

5. rolling mill is characterized by: the fixing frame of gear motor respectively on the bearing at the two ends of roll; The output shaft and the roll of gear motor are linked in the central portion of roll along same center line respectively.

6. one kind as the described rolling mill of claim 5, it is characterized by: each output shaft of gear motor and the coupled position between the roll are equidistant or non-equidistant apart from the center of roll.

7. rolling mill is characterized by: the output shaft of the driving roll of the output shaft of the driving roll of top and below is inserted in the medium pore of roll from different mutually directions, make it to obtain respectively to connect.

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