CN1077666A

CN1077666A - Milling train

Info

Publication number: CN1077666A
Application number: CN 93102849
Authority: CN
Inventors: K·克拉马; W·罗德
Original assignee: SMS Schloemann Siemag AG
Current assignee: SMS Siemag AG
Priority date: 1992-03-13
Filing date: 1993-03-11
Publication date: 1993-10-27
Also published as: EP0560192A1; DE4208075A1; JPH06114420A

Abstract

For rolling its final thickness is the little material that is difficult to moulding, use cluster mill usually, its working roll adopts the sidepiece supporting scheme.On four rollers or six-high cluster mill, the essential bending rigidity of working roll has limited the minimum diameter of working roll.For can dwindle the diameter of working roll greatly in these milling trains, the roll neck of suggestion working roll is radially seamlessly supporting.

Description

Milling train

The present invention relates to a kind of milling train of two intermediate calender rolls that have (schleppangetriebenen) working roll of two drawing types drivings, two backing rolls and according to circumstances be provided with, this milling train is little flat strip in order to rolling particularly final thickness, and its roll is located on the vertical plane that stretches with the supporting roller line parallel and can supporting on this vertical plane with being pressed into.

People efforts be made so that this milling train can make work roll diameter be reduced to when rolling final thickness is the little material that is difficult to be shaped minimum as far as possible.In the case, arrived soon by the ability of the essential moment of torsion of working roll transmission and the limit that self rigidity of working roll is limited.In order not consider to transmit the ability of moment of torsion, the present invention's industry is a starting point with the working roll that adopts drawing type to drive.But self rigidity of work roll diameter and working roll is relevant, and its rigidity and roller diameter, roll-force and the roll length determined with the distance between corresponding roll bearing are relevant.

By the working roll stabilising arrangement is set in the horizontal direction, can make the diameter of working roll littler than the work roll diameter of four common rollers or six-high cluster mill, under the situation of certain roll length and roll-force, can obtain the work roll diameter of corresponding minimum.For will also further dwindling work roll diameter, have only sidepiece supporting scheme just can be achieved by being adopted such as multi roll cold-rolling mill, 12 roller mills or 20 roller mills.

The critical defect of sidepiece supporting scheme is, for example adopts the cold-rolling mill of this supporting scheme to be in operation and no longer can cool off with emulsion.In adopting the milling train of this scheme, can not adopt the partition type cooling device based on the reason of floor space aspect.When these milling train operations, use ROLLING OIL only, therefore limited the speed of service of milling train, also cause the unclean and defectives such as indentation and piebald in surface simultaneously.Other shortcoming is that because of roll wear has improved the roll expense soon, roll occurs the danger of indentation, and frame must be born very big side force.

Known already, working roll is supporting near the body of roll section of roll neck backing roll or the supporting disk by sidepiece, make the body of roll zone of working roll can be free approaching, but the bending rigidity of the working roll that is supporting so then significantly reduces with respect to 12 roller mills or 20 roller mills, and this makes may increasing much by minimum diameter of working roll.

In addition, for example in Deutsche Bundespatent 3431691 disclosed structures, each roller neck is provided with two bearings vertically.In the working roll pull back device of the level that constitutes like this, bearing size is chosen to make working roll can adopt the diameter smaller slightly than the roller diameter of the milling train that does not have this pull back device, its reason is, a bearing that is seated in two bearings on each roller neck nestles up the roll barrel setting, makes the barrel length of working roll level off to the roll length of corresponding decision bending rigidity.By compressing into the working roll of trying hard to contend with accordingly in the bending of bearing, this bending has negative effect to the roll length that works when considering bending rigidity.But almost do not make progress aspect the minimum work roll diameter relating to.

Therefore, the object of the present invention is to provide a kind of milling train of putting forward type, the diameter of the working roll that this milling train is used reaches the common minimum diameter size of multi roll cold-rolling mill or 12 roller mills, but does not have imperfect supporting arrangement.

To achieve these goals, the technical scheme of the present invention's suggestion is radially do not have the minimum bearing in gap or gap for each working roll is provided with at least one.

The horizontal deflection that this feature can guarantee working roll is by seamlessly or have and minimumly clamp two roll ends with gap and reduce, thus can not can as roll bearing bending has just taken place in bearing like that.Like this, contingent sweep can only be tangentially to be close on the axis of roller neck.Owing to reduced horizontal deflection, therefore can adopt the more roll of minor diameter, so that under other situation situation identical, keep identical bending skew with traditional milling train.

According to structure of the present invention, each design bearing of working roll becomes to have sliding bearing structure at least one continuous slit of stretching vertically, that can clamp; Each bearing of working roll also can be designed to can combine to the supporting roller that corresponding roller neck clamps by at least two, and these supporting rollers are located on the sagittal plane on the roller neck circumference, implement supporting basically in the horizontal direction.Adopt long bearing components, make radially seamlessly or the minimum working roll that supports with gap becomes possibility.According to another kind of structure of the present invention, each bearing of working roll can be designed to have the short bearing components that a plurality of orders vertically are provided with.

In addition, significant is, backing roll and/or intermediate calender rolls, working roll also can be provided with axial moving device, the pull back device that works in vertical direction and have grinding convexity (geschliffene Bombierung) in case of necessity.

The bearing block of working roll of the present invention can needn't be big in short downtime cost just can pack in traditional rolling-mill housing, these milling trains can be used than the working roll of the bending resistance of minor diameter no problemly reequip and rolling its final thickness of energy is the product that little flat strip or its material are difficult to be shaped.

Further illustrate the present invention by accompanying drawing below.In the accompanying drawings:

Fig. 1 is illustrated in the bending of work roll line in the milling train of known bearing;

Fig. 2 illustrates the bending of work roll line that clamps by the present invention;

Fig. 3 is the schematic side sectional view with six-high cluster mill of workroll bearing of the present invention;

Fig. 4 is the diagrammatic top view of the working roll that supporting by the present invention.

Fig. 1 schematically illustrates working roll 1 with the form of axis.Working roll 1 be bearing in known bearing 2,2 ' in.The bending rigidity of working roll depends on length L _AS, roll diameter and rolling force F _WKIn rolling force F _WKWhen acting on the working roll 1, the horizontal component by this roll-force is directed at the roll bending, its bending of work roll situation as 1 ' shown in.As can be seen, working roll 1 ' bending be stretched over from the center of bearing 2 always bearing 2 ' the center, in other words, working roll bending also occurred at bearing region.This makes working roll 1 ' bigger skew of appearance in rolled strip 3 scopes.

Fig. 2 shows same working roll 1, and this working roll radially seamlessly is bearing in bearing 4 to 4 " ' in.In identical rolling force F _WKEffect down, the skew of working roll 1 ' in rolled strip 3 scopes has been dwindled significantly.Roll 1 ' at bearing 4 to 4 " ' interiorly do not bend.The roll 1 ' " sweep of tangentially being close to the working roll 1 that does not have load in the ' scope at bearing 4 to 4.

If under situation, draw and working roll 1 shown in Figure 1 ' identical skew, under the identical prerequisite of other condition, can dwindle the diameter of working roll with bearing shown in Figure 2.In four rollers that are provided with horizontal stabilizer or six-high cluster mill, the reduction volume of above-mentioned diameter can reach about 40%, the result adopts four rollers of workroll bearing shown in Figure 2 or six-high cluster mill to move with such working roll, and its diameter little has only 12 roller mills just can do to obtain so far.

Fig. 3 shows the six-high cluster mill with working roll 1 and 1a,

intermediate calender rolls

5 and 5a and backing roll 6 and 6a.Working roll can vertically support in the window of the mill housing that does not illustrate in the drawings 4 by bearing shell shape sliding bearing with compressing into.Intermediate calender rolls 5 and/or backing roll 6 can be provided with or have pull back device, axial moving device and a grinding convexity that does not illustrate among the figure.These normally are implemented on working roll 1, the 1a the correction measure that the band profile plays influence by equipment.According to circumstances also can be located at these means on working roll 1, the 1a in order to the contour shape that influences the body of roll.Owing to do not need supporting arrangement, be used to make the spray beam lubricated and cooling of process optimization can be arranged on the plane of working roll and intermediate calender rolls.

Fig. 4 show no gap bearing 4 to 4 under having ' " the vertical view of working roll 1.The both sides of working roll 1 are by bearing 4,4 ₁, 4 ', 4 ₁' and 4 ", 4 ₁", 4 " ', 4 ₁" ' seamlessly clamps, thereby it is crooked in bearing to have got rid of roller neck.In addition, bearing 4 ', 4 ₁', 4 ", 4 ₁" as close as possible roll barrel zone is provided with, and making to influence the length L of bending of work roll rigidity under the situation of given barrel length _ASShorten as far as possible.

Claims

1, a kind of milling train of two intermediate calender rolls that have the working roll of two drawing types drivings, two backing rolls and according to circumstances be provided with, this milling train is the product that little flat strip or its material are difficult to be shaped in order to rolling particularly final thickness, its roll is located on the vertical plane with the roll axis extends parallel basically and can supporting on this plane with compressing into, it is characterized in that radially not having the minimum bearing in gap or gap for each working roll (1,1a) is provided with at least one.

According to the described milling train of claim 1, it is characterized in that 2, each design bearing of working roll (1,1a) becomes to have sliding bearing structure at least one continuous slit of stretching vertically, that can clamp.

3, according to the described milling train of claim 1, it is characterized in that, each bearing of working roll (1,1a) can combine to the supporting roller that corresponding roller neck clamps by at least two, these supporting rollers are located on the sagittal plane on the roller neck circumference, implement supporting basically in the horizontal direction.

4, according at least one the described milling train in the claim 1 to 3, it is characterized in that, each bearing of working roll (1,1a) have the bearing components that a plurality of orders vertically are provided with (4,4 ', 4 ", 4 " ', 4 ₁, 4 ₁', 4 ₁", 4 ₁" ').

5, according at least one the described milling train in the claim 1 to 4, it is characterized in that, at least one pair of roll, as known, set pull back device and/or axial moving device, at least one pair of roll, as known in the art, can have the grinding convexity.

6, according at least one the described milling train in the claim 1 to 5, it is characterized in that, stable in order to be up to the standard, at least one pair of roll, as known in the art, move outward from the vertical plane that forms by roll axis.