CN202137193U

CN202137193U - Roller device for rolling mill

Info

Publication number: CN202137193U
Application number: CN201120216138U
Authority: CN
Inventors: 仇文秋
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-24
Filing date: 2011-06-24
Publication date: 2012-02-08
Anticipated expiration: 2021-06-24

Abstract

The utility model discloses a roller device for a rolling mill, which consists of a lower working roller, supporting roller balance cylinders and positive bending cylinders, wherein a plurality of positive bending cylinders are arranged in a raised valve block of a rolling mill housing and act between an upper working roller bearing seat and a lower working roller bearing seat; a plurality of negative bending cylinders are arranged in an upper supporting roller bearing seat and a lower supporting roller bearing seat and act between the working roller bearing seat and the supporting roller bearing seat; a plurality of supporting roller balance cylinders are arranged in the raised valve block of the rolling mill housing, and the rolling mill jacks up supporting rollers when is not working; and a pressure oil cylinder is arranged below a beam of the rolling mill housing. According to the breadth of a material to be rolled, harmful contact areas corresponding to two sides of the supporting rollers are ground to double taper so that working rollers are not in contact with the supporting rollers beyond the bandwidth contact; and the thermal crown time of a roller is reduced, the service life of the roller is prolonged, the harmful areas are effectively prevented from being rolled, the plate type and the quality of a product are ensured, the rolling speed is improved, the production speed is improved, and the production cost is saved.

Description

A kind of mill rolls device

Technical field

The utility model relates to a kind of mill rolls device, and it is applicable to rolling thin strip.

Background technology

In the copper process, milling train is being undertaken the important process equipment of rolled piece thickness and target thickness variation, and its purpose makes rolled piece roll thinner and thinner exactly; Finish to gauge is to target thickness; Because receive the constraint of all kinds of change condition, the original blank that plate shape is good is in process; The quality of its plate shape, depend on strip along on the cross direction extension whether equate.When the bilateral wave that then produces symmetry when extending greater than the middle part is extended on the strip both sides, on the contrary wave in the middle of then producing, when the power of depressing when both sides is inconsistent, when power of then depressing and area are big, one side i.e. extension also big produce single wave or lateral bending.Vertical when wave at rolled piece, when laterally increasing simultaneously, then can produce the wooden dipper song.Along wide to the longitudinal extension difference big more, the additional stress in the rolled piece is high more, flatness defect is just serious more.

Summary of the invention

The purpose of the utility model will provide a kind of mill rolls device exactly, and it can overcome the existing existing problem of roll device.The purpose of the utility model is to realize like this; A kind of mill rolls device; Comprise that bottom working roll, backing roll compensating cylinder, just curved cylinder form, it is characterized in that: several are just being bent cylinders and are being positioned at mill housing convexity valve piece, act between the upper and lower double-working bearing block; Several negative curved cylinders are positioned at upper and lower two back-up chocks, act between working roll bearing block and the back-up chock; Several backing roll compensating cylinders are positioned at the protruding valve piece of mill housing, jack-up top backing up roll when milling train is not worked; Oil pressure cylinder is positioned under the mill housing crossbeam; According to the width of institute's rolled material, be ground to double tapered to harmful contact zone, the both sides of corresponding backing roll, working roll is disengaged in the zone outside bandwidth contacts with backing roll.The utility model is ground to double tapered to harmful contact site, the both sides of corresponding backing roll according to the width of rolling material, and working roll is disengaged in the zone outside bandwidth contacts with backing roll.The lateral stiffness of milling train is big, and the flatness defect that when rolling, causes because of inhomogeneous extension has effectively been avoided in the influence that the working roll amount of deflection is not changed by roll-force.Reduce the protruding time of roll heat, prolonged roll service life, effectively avoided rolling harmful zone, product template quality is guaranteed, improved mill speed, improved productivity ratio, practiced thrift production cost.

Description of drawings:

Fig. 1 is the front view in the utility model structural representation;

Fig. 2 is the left view in the utility model structural representation;

Force analysis sketch map when Fig. 3 is the positive roller of milling train;

Force analysis sketch map when Fig. 4 is the negative roller of milling train;

Fig. 5 is a four-high mill force analysis sketch map;

1. mill housing, 2. oil pressure cylinder, 3. top backing up roll bearing block, 4. top working roll bearing block; 5. bottom working roll bearing block, 6. skewback, 7. bottom working roll, 8. backing roll compensating cylinder; 9. just curved cylinder, 10. negative curved cylinder, 11. top working rolls, 12. tops backing up roll, 13. protruding valve pieces; 14. the lower support roll bearing seat, 15. roll-forces, 16. bending roller forces, 17. harmful contact zones.

The specific embodiment: the utility model is described further below in conjunction with accompanying drawing;

A kind of mill rolls device comprises bottom working roll 7, backing roll compensating cylinder 8, just curved 9 compositions of cylinder, it is characterized in that: several just curved cylinders 9 are positioned at mill housing 1 protruding valve piece 13, act between the upper and lower double-working bearing block; Several negative curved cylinders 10 are positioned at upper and lower two back-up chocks, act between working roll bearing block and the back-up chock; Several backing roll compensating cylinders 8 are positioned at mill housing 1 protruding valve piece 13, jack-up top backing up roll when milling train is not worked; Oil pressure cylinder 2 is positioned under mill housing 1 crossbeam; According to the width of institute's rolled material, be ground to double tapered to harmful contact zone, the both sides of corresponding backing roll, working roll is disengaged in the zone outside bandwidth contacts with backing roll.During practical implementation, just curved cylinder is positioned at totally eight of the protruding valve pieces of mill housing, acts between the double-working bearing block, reduces the working roll amount of deflection, prevents bilateral wave, its bending roller force size of general passing ratio valve pressure-reducing valve adjustment; Negative curved cylinder is positioned at totally eight of back-up chocks, acts between working roll bearing block and the back-up chock, increases the working roll amount of deflection and prevents middle wave; The backing roll compensating cylinder is positioned at totally four of the protruding valve pieces of mill housing, and main effect is milling train jack-up top backing up roll when not working, and prevents because of deadweight the working roll roll surface to be weighed wounded; Oil pressure cylinder is positioned under the memorial archway crossbeam, provides downward roll-force to watch valve adjustment pressure size, pressure sensor and position sensor feedback with hydraulic pressure; Skewback generally drives screw mandrel adjustment position by hydraulic motor, reaches the purpose of adjustment roll line; Through adjusting transmission and operation hydraulic jack pressure, thereby, the reaction force of band reaches tuningout control because changing front and back roll gap size.Main hydraulic bending roll and the tuningout of adopting of plate shape control controlled; Because original roll forming can not change with the change of rolling condition; And the rolling condition during actual production is Protean, therefore, must constantly roll forming and plate shape be adjusted and control according to condition of different when rolling; Compensating roller deformationization obtains the good product of plate shape effectively.Hydraulic bending roll can in time and effectively be controlled the lateral thickness difference and the plate shape of strip, and it can make working roll produce addition bend, and the roll gap shape that produces owing to technological factors such as draught pressure and rolling temperature change with compensation changes.Crooked working roll has just curved and negative curved dual mode.Recurvation power is added between the double-working bearing block as shown in Figure 3ly during positive roller, makes upper and lower working roll bearing block receive the bending roller force F identical with roll-force p direction ₁, can reduce the amount of deflection of working roll when rolling, prevent bilateral wave.Bending roller force is added between double-working and the back-up chock as shown in Figure 4ly during negative roller, makes working roll bearing block receive the bending roller force F1 in the opposite direction with roll-force p, can increase the amount of deflection of working roll when rolling, prevents the centre wave.The quality of plate shape; Be decided by in the operation of rolling along the uniformity whether of the longitudinal extension on the cross direction, and the shape of roll gap is to influence the whether even main factor of strip material distortion, is example with the four-high mill; As shown in Figure 5: when rolling band than the narrow certain width of work roll surface; Contact portion between working roll and the backing roll forms a harmful moment of flexure outside bandwidth, make working roller bending, finally has influence on template.Harmful in addition moment of flexure has been offset the effect of very most of bending roller force, and the result has also hindered the performance of hydraulic bending roll effect.

In order to eliminate or reduce the influence of harmful moment of flexure; Can be ground to double tapered to harmful contact zone, the both sides of corresponding backing roll, to the above milling train of 12 rollers to the width of roll material; The one-level backing roll can be ground to two notch cuttypes, and working roll is disengaged in the zone outside bandwidth contacts with backing roll.Adopt this kind method, the lateral stiffness of milling train is big, the influence that the working roll amount of deflection is not changed by roll-force, template good stability.

In the middle of the actual production; The width of band is not necessarily consistent; We can be divided into 2-3 type to the little product in batch of width difference; Formulate the size of grinding backing roll by the wideest product in dissimilar, when the band of rolling respective widths type, harmful contact area of backing roll and working roll can reduce greatly like this.For with band narrower in the width type,, reach the purpose of control template through adjusting the shape that little bending roller force just can change roll gap.

Claims

1. mill rolls device; Comprise that bottom working roll (7), backing roll compensating cylinder (8), just curved cylinder (9) form; It is characterized in that: several just curved cylinders (9) are positioned at the protruding valve piece of mill housing (1) (13), act between the upper and lower double-working bearing block; Several negative curved cylinders (10) are positioned at upper and lower two back-up chocks, act between working roll bearing block and the back-up chock; Several backing roll compensating cylinders (8) are positioned at the protruding valve piece of mill housing (1) (13), jack-up top backing up roll when milling train is not worked; Oil pressure cylinder (2) is positioned under mill housing (1) crossbeam.

2. mill rolls device; Comprise that bottom working roll (7), backing roll compensating cylinder (8), just curved cylinder (9) form; It is characterized in that: according to the width of institute's rolled material; Be ground to double tapered to harmful contact zone, the both sides of corresponding backing roll, working roll is disengaged in the zone outside bandwidth contacts with backing roll.