CN201157844Y

CN201157844Y - Backing roll

Info

Publication number: CN201157844Y
Application number: CNU2008200433169U
Authority: CN
Inventors: 王朝晖; 毛新平; 谢劲松; 宋昕
Original assignee: ZHUJIANG IRON AND STEEL CO Ltd GUANGZHOU
Current assignee: ZHUJIANG IRON AND STEEL CO Ltd GUANGZHOU; GUANGZHOU ZHUJIANG STEEL Co Ltd
Priority date: 2008-01-25
Filing date: 2008-01-25
Publication date: 2008-12-03
Anticipated expiration: 2018-01-25

Abstract

The utility model discloses a support roll which comprises a support roll main body and support shaft journals arranged at two ends of the support roll main body, wherein, the circumferential surface of the support roll main body is a roll surface, and two ends of the support roll main body are both roll ends; the diameters of the roll ends are gradually shortened from the middle to the end part. The support roll is characterized in that a projection line on an axial section at the roll ends comprises a chamfer angle line arranged at the outer end and a circular arc line which is arranged at the inner end and is adjacent to the chamfer angle line. The support roll reduces the part stress concentration, and effectively prevents fatigue and desquamation from happening.

Description

A kind of backing roll

Technical field

The utility model relates to the hot-rolled steel field, specifically relates to the backing roll that a kind of continuous hot-rolling mill uses.

Background technology

In continuous hot-rolling mill, need be used for backing roll, backing roll is pressed on the working roll, working roll is pressed on the hot rolled steel plate and to hot rolled steel plate and exerts pressure, owing to born very big operating pressure between backing roll and the working roll, backing roll and working roll deform owing to stressed, make the roller end of backing roll and working roll interfere, tired, impression, even peeling phenomenon appears, for alleviating this phenomenon, the roller end of existing backing roll has carried out optimal design, a kind of backing roll as having occurred now in roller end place reduced, and makes roll surface be two sections circular arcs in the projection of axial cross section, yet, the fatigue of the roller end of this backing roll, impression even peel off existing is not resolved, particularly in the scope of 200 millimeters of roller ends, and its fatigue, the impression phenomenon is even more serious, accidents such as backing roll peels off have a strong impact on the production of thin format hot rolled steel plate at high proportion, and cause the roller consumption to increase.

The utility model content

The purpose of this utility model is the backing roll that provides novel, reaches to eliminate or reduce the backing roll stress raisers, prevents the backing roll local fatigue even peels off the generation of accident.

The utility model is achieved through the following technical solutions:

A kind of backing roll comprises the backing roll main body and is located at the support axle journal at backing roll main body two ends that the circumferential surface of backing roll main body is that roll surface, backing roll main body two ends are roller end; To end direction, the roller end diameter dwindles gradually from the middle part; At the roller end place, roll surface comprises the chamfering line that is positioned at the outer end and is positioned at the inner and near the circular arc line of chamfering line at the projection line of axial cross section.

The angle of described chamfering line and backing roll axis is 45 degree, and its length is 15 to 25 millimeters.

Distance between the center of circle of described circular arc line and the plane, described axial end place is 100 to 300 millimeters, and the radius of this circular arc line is 10 to 20 meters.

The utility model compared with prior art has following advantage:

During work, backing roll is rack-mount by supporting axle journal, and roll surface is contacted with working roll, adopt technology of the present utility model, alleviated backing roll end stress raisers, eliminated the peeling phenomenon of backing roll end 200mm scope, made backing roll military service cycle stretch-out, reduce the roller consumption and reduced the roll change number of times, promoted the production of thin format hot rolled steel plate at high proportion.

Description of drawings

Fig. 1 is among the utility model embodiment one, the partial sectional view of described backing roll;

Fig. 2 is an A place enlarged drawing among Fig. 1;

Fig. 3 is for after adopting embodiment one described structure, with the comparison diagram that peels off number of times before the enforcement;

Fig. 4 is after adopting embodiment two described structures, with the comparison diagram that peels off number of times before the enforcement;

Fig. 5 is after adopting embodiment three described structures, with the comparison diagram that peels off number of times before the enforcement;

Description of reference numerals:

1, axial end, 2, roll surface, 3, roller end, 4, the chamfering line, 5, circular arc line, 6, the backing roll axis, 7, support axle journal.

The specific embodiment

The utility model is for specifically being implemented on the backing roll that each frame of bar strip continuous casting and rolling flow path hot continuous rolling unit is used, the slab thickness that adopts is 50～60mm, width of plate slab is 1000～1350mm, and the slab tapping temperature is 1050～1180 ℃, and belt steel thickness is 1.2～12.7mm; The roller of backing roll directly is 1250～1350mm, and barrel length is 1500mm, and the roller of working roll directly is 720～800mm, and barrel length is 1700mm.

Embodiment one

A kind of backing roll comprises the backing roll main body and is located at the support axle journal 7 at backing roll main body two ends that the circumferential surface of backing roll main body is that roll surface 2, backing roll main body two ends are roller end 3; To end direction, roller end 3 diameters dwindle gradually from the middle part; At roller end 3 places, roll surface 2 comprises the chamfering line 4 that is positioned at the outer end and is positioned at the inner and near the circular arc line 5 of chamfering line 4 at the projection line of axial cross section; Wherein, chamfering line 4 is 45 degree with the angle of backing roll axis 6, and its length is 21 millimeters; Distance between the center of circle of circular arc line 5 and the plane, axial end 1 place is 200 millimeters, and the radius of this circular arc line is 10 meters.

As shown in Figure 3, present embodiment has been alleviated roller end 3 stress raisers of backing roll, eliminated the peeling phenomenon of the 200 millimeters scopes in roller end 3 places of backing roll, make backing roll military service cycle stretch-out, reduced the roller consumption and reduced the roll change number of times (number of times of dash area for peeling off before implementing, white space is the number of times that peels off after implementing), promote the production of thin format hot rolled steel plate at high proportion.

Embodiment two

Present embodiment is that with the different of embodiment one radius of circular arc line is 15 meters.Its with implement before the number of times comparison diagram that peels off see Fig. 4,, as shown in Figure 4, the peeling phenomenon of backing roll end is also obviously controlled.

Embodiment three

Present embodiment is that with the different of embodiment one radius of circular arc line is 20 meters, its with implement before the number of times comparison diagram that peels off see Fig. 5, as shown in Figure 5, the peeling phenomenon of backing roll obviously reduces.

Claims

1, a kind of backing roll comprises the backing roll main body and is located at the support axle journal at backing roll main body two ends that the circumferential surface of backing roll main body is that roll surface, backing roll main body two ends are roller end; To end direction, the roller end diameter dwindles gradually from the middle part; It is characterized in that at the roller end place, roll surface comprises the chamfering line that is positioned at the outer end and is positioned at the inner and near the circular arc line of chamfering line at the projection line of axial cross section.

2, backing roll according to claim 1 is characterized in that, the angle of described chamfering line and backing roll axis is 45 degree, and its length is 15 to 25 millimeters.

3, backing roll according to claim 1 is characterized in that the distance between the center of circle of described circular arc line and the plane, described axial end place is 100 to 300 millimeters, and the radius of this circular arc line is 10 to 20 meters.