CN1240682A

CN1240682A - Rolling mill roll stand

Info

Publication number: CN1240682A
Application number: CN 99107119
Authority: CN
Inventors: 哈罗德·E·伍德罗; T·M·肖尔
Original assignee: Morgan Construction Co
Current assignee: Siemens Industry Inc
Priority date: 1998-05-28
Filing date: 1999-05-28
Publication date: 2000-01-12

Abstract

A housingless roll stand has a pair of work roils supported between bearing chocks for rotation about parallel axes. The bearing chocks are mechanically engaged by nuts which in turn are threadedly engaged by opposite hand screw segments on spindles. The spindles serve both to effect symmetrical roll parting adjustments, and to provide a short stress path loop for absorbing roll separating forces during rolling. The nuts and associated adjusting spindles are separable from the bearing chocks, thus enabling them to remain as permanent on line fixtures when making roll changes.

Description

The mill stand of rolling mill

The present invention relates generally to rolling mill, relates in particular to so-called " no guard shield " mill stand, and the roll separating force in the support is absorbed by the threaded spindle of extending between the bearing block of working roll.

In traditional no guard shield mill stand, working roll is bearing between the bearing block, to rotate around parallel axes.Bearing block comprises the nut of one, and their thread segments opposite with hand of spiral on the main shaft that extends between the adjacent shaft bearing of each working roll screw togather.Main shaft plays two effects, and the one, reach and regulate roll parting symmetrically, one provides a short stress path loop (stress path loop), to absorb rolling separating force in the operation of rolling.

Generally speaking, when milling train needed shutdown maintenance, for rapid replacing, standby rolling part assembly was not placed on the production line.Because all nuts and adjust main shaft and cooperate integratedly with separately bearing block so just need a plurality of nuts and adjust main shaft, not only will be supplied with online rolling part usefulness, supply with the standby rolling part usefulness of off-line in addition.So just becoming needs great number and extremely difficult fund input of bearing.

According to the present invention, all nuts and the corresponding main shaft of adjusting completely all break away from bearing block, thereby they are stayed as permanent on-line equipment.Therefore, the quantity of nut and respective threads main shaft can reduce to the required quantity of the actual online mill stand of maintenance.Standby rolling part does not still need these valuable members yet, greatly reduces the input of fund.

Consult accompanying drawing below and describe these and other purpose feature and advantage of the present invention in detail, wherein:

Fig. 1 is the front view of the present invention's one mill stand, shows the rolling part that moves on to rolling mill roll line one side with chain-dotted line among the figure;

Fig. 2 is the vertical view of mill stand shown in Figure 1;

Fig. 3 A is that it shows the bearing block of the mill stand that controllably meshes with nut piece along the cutaway view of the line 3-3 intercepting of Fig. 2;

Fig. 3 B one is similar to the view of Fig. 3 A, and it shows all nut pieces that break away from bearing block, makes the rolling part freedom thus, to leave rolling mill roll line;

Fig. 4 is the horizontal cross along the line 4-4 intercepting of Fig. 3 A;

Fig. 5 is the side view that moves on to the rolling part of rolling mill roll line one side.

Consult accompanying drawing, the total usefulness 10 of the mill stand of rolling mill of the present invention is represented.Mill stand comprises that one is positioned at the rolling part 12 of rolling mill roll line (mill pass line) P, has in the framework of basis 16 four corner posts 14 that vertically stretch, that interconnected by a head construction 18 on it and the milling train type is rolling.Head construction has bottom 18a, sidepiece 18b and top 18c, and they define an inner chamber 20.A worm reduction gear 22 is installed in outside in the chamber 20 of head construction 18.Worm reduction gear has a manually operated horizontal power shaft 24 and that the upright output shaft 25 of travelling gear 26 is housed.Gear 26 and four driven gears, 28 engagements of rotatably being fixed in all main shafts 30 upper ends, the bottom 18a of head construction 18 is vertically passed in the main shaft upper end.

All main shafts 30 pass up and down, and

nut piece

32 and 34 extends down.Thread segment 30a that hand of spiral on all main shafts 30 is opposite and 30b screw togather with

nut piece

32 and 34 up and down respectively.

Rolling part 12 comprise a pair of supported respectively so that the

working roll

36,38 that can rotate around parallel axes by the bearing (not shown) in the bearing block 40,42.All hydraulic pressure separators 44 are between the

adjacent bearing block

40,42 of each working roll.These separators 44 can impel all bearing blocks to separate with obeying, keep double-working to separate thus.As shown in Figure 5, two opposite ends of all vertical connectors 46 are connected in bearing block 40,42.These connectors have the groove 48 that can adjust roll parting (roll parting) working range.

Nut piece

32,34 has inclined plane 50, they be arranged to bearing block separately on inclined plane 52 relative engagements.By selecting 50,52 inclinations angle with respect to vertical line, inclined plane, towards making a concerted effort that bearing block draws, this inclination angle preferably is not more than 75 ° with nut piece in generation.The tubular sleeve 54 of top nut part 32 upper ends cooperates with opening among the head construction 18 bottom 18a, so that guiding and positioning function to be provided.Similarly sleeve 56 hangs down from lower nut spare 42, concurs with the fixed guide 58 that forms a frame structure part.

Step 42 comprises the keel that dangle (depending keels) 60 that all support wheels 62 are housed.Track 64 is below all support wheels 62.In the rolling process, in the whole working region of as shown in Figure 3A roll parting, symmetry is drawn close by the rotation of all main shafts 30 for

nut piece

32,34, thus with

bearing block

40,42 engagements.The support wheel 62 of step thus be thus lifted under track 64 above.

Inclined plane

50,52 concurs, firmly nut piece is locked on the bearing block.

When will with rolling part 12 when roll line is withdrawn, rotating all main shafts 30, be separated to the open position shown in Fig. 3 B to make

nut piece

32,34 symmetrically.Rolling part is descended, till support wheel 62 rests on the track 64 with respect to roll line P.

The rolling part side direction evacuates on the adjacent track 66 then, shown in the chain-dotted line among Fig. 1.All main shafts 30 and

nut piece

32,34 and framework are stayed on the roll line.A standby rolling part inserts framework again then, and makes all nut pieces get back to its clamped position of drawing close as shown in Figure 3A symmetrically by operating all main shafts 30, and is brought to a rolling position.

In sum, those skilled in the art should be understood that now by all

nut pieces

32,34 and main shaft 30 and the

bearing block

40,42 of rolling part are separated, can save considerable expense.The realization of this benefit need not be a cost to sacrifice shutdown maintenance replacing the easy and convenient of rolling part.

Claims

1. the mill stand of a rolling mill, it comprises:

One rolling part, it comprises a pair of working roll, each working roll has bearing block, to support described working roll around parallel axis rotation; And

One is positioned at framework on the roll line with described rolling part, described framework has all nut pieces and the corresponding main shaft of adjusting, so that described nut piece moves between closing position and open position symmetrically, at described nut piece of closing position and the engagement of described bearing block described bearing block and their working rolls are separately driven to described roll line inwardly, control the separation between the described working roll thus, break away from described nut piece of open position and described bearing block, allow described rolling part to leave described framework thus.

2. mill stand as claimed in claim 1 is characterized in that described rolling part also is included in the device that acts between the described bearing block, separates to make described working roll with obeying.

3. mill stand as claimed in claim 1 is characterized in that, described rolling part comprises that also the bearing block that makes a working roll is interconnected to the device of the bearing block of another working roll.

4. mill stand as claimed in claim 3 is characterized in that, the device of described interconnection comprises the connector that extends to the adjacent shaft bearing of another working roll from the bearing block of a working roll.

5. mill stand as claimed in claim 4 is characterized in that, described connector is configured to allow carry out limited separation between the working roll separately of all bearing blocks and they.

6. mill stand as claimed in claim 1 is characterized in that, described nut piece is arranged in the relative both sides and the engagement of described bearing block of described rolling part.

7. mill stand as claimed in claim 1 is characterized in that, also comprises the device between the adjacent shaft bearing of described rolling part, drives described bearing block separately to obey ground.

8. mill stand as claimed in claim 7 is characterized in that, also is included in the connector that extends between the adjacent shaft bearing of described rolling part and they are interconnected.

9. mill stand as claimed in claim 8 is characterized in that, described connector is configured to allow carry out limited relative motion between the adjacent shaft bearing of described rolling part.

10. the mill stand of a rolling mill, it comprises:

One rolling part, it comprises first and second working rolls, and supports the bearing block of these working rolls around the rotation that parallels to the axis; And

One is positioned at framework on the rolling mill roll line with described rolling part, described framework has all nut pieces and corresponding adjusting device, so that described nut piece moves between closing position and open position symmetrically, in of the bearing block engagement of the described nut piece of closing position with the direction that drives described working roll towards described roll line and described first and second working rolls, break away from described nut piece of open position and described bearing block, allow described rolling part to leave described framework thus.

11. mill stand as claimed in claim 10, it is characterized in that, described adjusting device be included in and all nut pieces of the adjacent shaft bearing of described first and second working rolls engagement between the main shaft that extends, described main shaft has the opposite thread segment of the hand of spiral that is screwed in the described nut piece separately, moves thereby described main axis rotation will make described nut piece make symmetry with respect to described rolling mill roll line.

12. mill stand as claimed in claim 11 is characterized in that, described nut piece in the interface that tilts with vertical line with described bearing block engagement.

13. mill stand as claimed in claim 10, it is characterized in that, described framework is provided with a rail system below described rolling part, wherein moves described nut piece to described open position, and described rolling part is placed on the described rail system to leave described framework.

14. mill stand as claimed in claim 13 is characterized in that, moves described nut piece to described closing position, and described rolling part is risen on the described rail system.

15. mill stand as claimed in claim 12 is characterized in that, the inclination angle at described interface is not more than 75 °.