KR20090061839A - Method of roll arrangement for hot coiled steel coil and/or plate - Google Patents

Abstract

An arrangement method of transfer rolls for hot rolled plates is provided to cut down on the cost for maintenance and repair of hot rolled plate transfer line and to reduce noise and vibration. An arrangement method of transfer rolls for hot rolled plates includes a step of setting temperature ranges of 600°C or more, 250~600°C, and 250°C or less according to the temperature of a hot rolled plate to be transferred on a hot rolled transfer path. In the temperature range of 600°C or more, one or more of rolls are arranged, the roll(A1) in which a heat-resistant ring(7) and discs(9) are alternately fixed to the outer surface of a metal hollow shaft(4) with a through hole(3) through which the cooling water passes, the roll in which a side ceramic, a filling disc, and a side ceramic are successively inserted to a metal shaft, and the roll in which an insert of ceramic cloth is placed between a ceramic sleeve and an inner tube. In the temperature range of 250~600°C, one or more of rolls are arranged, the roll in which a heat-resistant sound absorber is inserted in the hollow part of a steel sleeve, and the roll in which a first steel sleeve is inserted in a ceramic sleeve and the ceramic sleeve is inserted in a second steel sleeve. In the temperature range of 250°C or less, one or more of rolls are arranged, the roll having the same structure as the above roll, the rolls in which a heat-resistant sound absorber is inserted in the hollow part of a steel sleeve and non-woven cloth is attached to the outer surface of the steel sleeve, and the roll in which the exposed ring surface on the outer surface of the roll is surrounded with a steel cap.

Description

Method of roll arrangement for hot rolled plate transfer {Method of roll arrangement for hot coiled steel coil and / or plate}

The present invention relates to a method of arranging a roll for transporting a hot rolled sheet for transporting a hot rolled steel sheet (hereinafter referred to as "hot rolled sheet") having a sheet thickness of 6 mm or more, and more specifically, a thick plate rolling process and a thick plate. The present invention relates to a method for arranging hot rolled sheet conveying rolls installed in a hot rolled plate conveying process line, including straightening, shearing, and inspection.

In general, the hot rolled sheet conveying process line has a length of 150 ~ 200m and about 100 ~ 150 conveying rolls are arranged, so that the noise caused by impact, friction and vibration generated between the hot rolled sheet conveyed and the conveying roll is greatly increased. Since the temperature of the hot rolled plate itself reaches about 800 ° C. at the beginning of the transfer and about 100 ° C. at the end of the transfer, the temperature deviation is very large according to the transfer distance.

However, the conventional steel rollers, such as the steel roller disclosed in the Republic of Korea Utility Model Registration No. 0431588, the coating on the outermost layer of the roller is peeled off or rotated by the high temperature of the hot rolled plate itself up to 800 ℃ initial hot rolled plate transfer Since the high temperature of heat is transmitted to the bearing supporting the rotating shaft, it shortens the durability life of the structure including the bearing, and it is not only costly to maintain and repair, but also to reduce the noise and vibration, so it could not improve the working environment significantly.

In addition, the conventional rolls, such as the heat-resistant nonwoven fabric roll disclosed in the Republic of Korea Utility Model No. 0319653, lack the heat resistance to the high temperature of the hot rolled plate itself up to about 800 ℃ of the initial transfer of the hot rolled plate, resulting in shortened durability life The cost of maintenance was high.

The present inventors have studied the problems of the hot rolled plate conveying process and the prior art as described above, and as a result, the transfer roll having a single structure alone has sufficient heat resistance in conveying the hot rolled plate having a large temperature deviation during conveying, and excellent noise and vibration prevention. It was found that the effect was not obtained, and thus, the present invention was completed.

Accordingly, an object of the present invention is to provide a method for arranging a roll for transferring a hot rolled sheet, characterized in that it selectively includes a plurality of rolls made of different materials suitable for each temperature zone of the target rolled plate in the hot rolled sheet conveying process. It is.

In the present invention, in arranging a hot rolled sheet conveying roll on a hot rolled sheet conveying process, three temperature zones are set according to the temperature of the hot rolled sheet, and among the plurality of rolls different in heat resistance, noise and vibration prevention performance for each of the temperature sections. It is characteristic to arrange the selected roll.

According to the present invention, a roll having excellent heat resistance, a roll having excellent heat resistance and noise resistance, and a roll having excellent heat resistance in response to a change in its own temperature of a target hot rolled steel plate having a temperature deviation according to a conveying distance, have a very excellent noise resistance. It is selectively arranged by zone to improve the working environment from noise and vibration while reducing the maintenance and repair cost of the hot rolled plate transfer process line in which many transfer rolls are arranged.

The present invention is a method for arranging a transfer roll on a hot rolled sheet conveying process line, the temperature zone (a), the temperature of 250 ~ 600 ° C that is 600 ℃ or more according to the temperature of the hot rolled sheet to be transferred on the transfer path of the hot rolled sheet Zone b and temperature zone c below 250 ° C. are set;

In the temperature zone (a) where the hot rolled plate to be transported has a temperature of 600 ° C. or more, (i) a heat-resistant ring 7 and a plurality of disks on the outer circumferential surface of the hollow metal shaft 4 having the through-holes 3 through which cooling water passes. The side ceramics 14, the charging disk 15, and the side ceramics 14 'are sequentially inserted into the outer circumferential surfaces of the rolls A1 and (ii) the metal shaft 10, in which 9 is alternately fixed, and the charging disk 15 A roll A2 having a ceramic sleeve 16 fixed to the surface thereof and a roll A2 having an insert 20 made of ceramic cloth between the ceramic sleeve 18 and the inner tube 19. Placing at least one roll selected from the group of rolls formed;

(B) Rolls B1 and (ii) in which the hollow portion 22 of the steel sleeve 21 is filled with the heat-resistant sound absorbing agent 23 in the temperature zone (b) having a self-temperature of the hot-rolled thick plate to be transferred (ii). The heat-resistant sound-absorbing material 26 is filled in the hollow portion 25 of the first steel sleeve 24, the first steel sleeve 24 is sandwiched in the ceramic sleeve 27, and the ceramic sleeve 27 is second. Arranging at least one roll selected from the rolls B2 fitted in the steel sleeve 28;

In the temperature zone (C) in which the hot rolled plate to be transported has its own temperature of 250 ° C. or less, (i) the roll C1 having the same structure as the roll B1, and (ii) the hollow portion 30 of the steel sleeve 29. Heat-resistant sound-absorbing material 31 is filled in the outer peripheral surface of the steel sleeve 29, a plurality of rings (C2) made of non-woven fabric and (iii) the exposed surface of the ring 32 on the outer peripheral surface of the roll (C2) steel cap And at least one roll selected from the rolls C3 wrapped by (33).

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 illustrates a hot rolled plate conveying process diagram in which a plurality of rolls 2 are disposed to convey and support the hot rolled plate 1, and three temperature zones according to temperature deviations of the hot rolled plate 1 itself. For example, a temperature zone (a) of 600 ° C or higher, a temperature zone (b) of 250 to 600 ° C and a temperature zone (c) of 250 ° C or lower are indicated.

2a to 2c illustrate transfer rolls A1, A2, A3 which are selectively arranged in the temperature zone a above 600 ° C.

The roll A1 illustrated in FIG. 2A has a stationary flange 5 on the outer circumferential surface of the metal hollow shaft 4 with a through hole 3 through which cooling water passes, and a moving flange 7 tightened with a nut 6. The heat-resistant ring 8 and a plurality of disks 9 made of an inorganic material are alternately sandwiched between nickel-cobalt-based or ceramic, and the heat-resistant ring 8 and the disks 9 are arranged in the metal hollow shaft 4. ) Is fixed in a non-contact state.

(A2) illustrated in FIG. 2B shows the side ceramic disc 14 and the filling disc 15 between the fixed flange 11 on the outer circumferential surface of the metal shaft 10 and the movable flange 13 tightened with the nut 12. And the side ceramic disc 14 'are inserted in turn, and the ceramic sleeve 16 is fixed between the surface of the filling disc 15 and the side ceramic disc 14 and the side ceramic disc 14'. have.

In the roll A3 illustrated in FIG. 2C, an inner tube 19 is inserted into a ceramic sleeve 18 fixed between two shafts 17 and 17 ′, and the ceramic sleeve 18 and the inner tube 19 are inserted into the roll A3. In between is provided with a shock-resistant insert 20 made of a ceramic cloth.

3A and 3B illustrate rolls B1 and B2 selectively disposed in the temperature zone b of 200-600 ° C.

In the roll B1 illustrated in FIG. 3A, the heat-resistant sound absorbing material 23 is filled in the hollow portion 22 of the steel sleeve 21 fixed to the axis of which the expression is omitted.

In the present invention, the heat resistant sound absorbing material 23 is made of rock wool, ceramic disks, inorganic fibers such as ceramic fibers, glass fibers, heat resistant nonwoven fabrics, and the like.

The roll B2 illustrated in FIG. 3B is filled with a heat-resistant sound-absorbing material 26 in the hollow portion 25 of the first steel sleeve 24 fixed to the axis of which the expression is omitted, and the first steel sleeve 24. Is inserted into the ceramic sleeve 27, and the ceramic sleeve or the ceramic disk 27 is fitted into the second steel sleeve 28.

4a to 4c illustrate transfer rolls C1, C2, C3 which are selectively arranged in the temperature zone c below 250 ° C.

The roll C1 illustrated in FIG. 4A has the same structure as the roll B1 illustrated in FIG. 3A, and the heat-resistant sound absorbing material 23 is filled in the hollow portion 22 of the steel sleeve 21.

The roll C2 illustrated in FIG. 4B is filled with a heat-resistant sound absorbing material 31 in the hollow portion 30 of the steel sleeve 29, and a plurality of rings 32 made of non-woven fabric on the outer circumferential surface of the steel sleeve 29. It is provided.

The roll C3 illustrated in FIG. 4C is filled with a heat-resistant sound absorbing material 31 in the hollow portion 30 of the steel sleeve 29, and a plurality of rings 32 made of nonwoven fabric on the outer circumferential surface of the steel sleeve 29. Is provided, and the exposed surface of the ring 32 is wrapped with a steel cap 33.

The present invention is characterized in that the rolls made of different structures and materials as described above are selectively arranged corresponding to the temperature of the hot rolled plate to be transported having a temperature deviation according to the transfer distance on the hot rolled plate transfer process line.

The present invention is selected from the roll (A1, A2, A3) group illustrated in Figs. 2A to 2C having excellent heat resistance in a temperature zone (a) having a self-temperature of the target hot rolled plate in a hot rolled plate transfer process line. The rolls (B1, B2, B3) illustrated in Figs. 3A and 3B having excellent heat resistance and noise resistance in a temperature zone (b) having at least two or more rolls and having a self-temperature of 250 to 600 ° C of the target hot rolled plate The roll (C1, illustrated in Figs. 4a to 4c) having one or more rolls selected from and having heat resistance in a temperature zone (c) having a self-temperature of the hot rolled thick plate to be transferred at 250 ° C. or less, having excellent noise resistance. One or more types of rolls selected from the group C2 and C3) are arranged.

As described above, the present invention corresponds to a roll having excellent heat resistance, a roll having excellent heat resistance and noise resistance, and a roll having excellent heat resistance in response to a change in its own temperature of the target hot rolled plate having a temperature deviation according to the feeding distance. Since it is arranged by temperature zone, it improves the working environment from noise and vibration while reducing the maintenance and repair cost of the hot rolled plate conveying process line in which many transfer rolls are arranged.

1 is an exemplary view illustrating a hot rolled plate conveying process to which the present invention is applied.

Figures 2a to 2c is an exemplary view of the transfer roll selectively disposed in a temperature zone of the self-temperature of the hot-rolled thick plate to be transported in the present invention 600 ℃ or more.

Figure 3a and Figure 3b is an exemplary view of the transfer roll to be disposed selectively in the temperature zone of the self-temperature of the hot rolled plate to be transported in the present invention 250 ~ 600 ℃.

Figures 4a to 4c is an exemplary view of the transfer roll selectively disposed in the temperature zone of the self-temperature of the hot rolled plate to be transported in the present invention 250 ℃ or less.

Claims (1)

In the method of arranging the transfer roll on the hot rolled sheet conveying process line, a temperature zone (a) of 600 ° C. or higher and a temperature zone of 250 ° C. to 600 ° C. (b) depending on the temperature of the hot rolled sheet to be transferred on the transfer path of the hot rolled sheet. ) And a temperature zone (c) of 250 ° C. or less; In the temperature zone (a) where the hot rolled plate to be transported has a temperature of 600 ° C. or more, (i) a heat-resistant ring 7 and a plurality of disks on the outer circumferential surface of the hollow metal shaft 4 having the through-holes 3 through which cooling water passes. The side ceramics 14, the charging disk 15, and the side ceramics 14 'are sequentially inserted into the outer circumferential surfaces of the rolls A1 and (ii) the metal shaft 10, in which 9 is alternately fixed, and the charging disk 15 A roll A2 having a ceramic sleeve 16 fixed to the surface thereof and a roll A2 having an insert 20 made of ceramic cloth between the ceramic sleeve 18 and the inner tube 19. Placing at least one roll selected from the group of rolls formed; (B) Rolls B1 and (ii) in which the hollow portion 22 of the steel sleeve 21 is filled with the heat-resistant sound absorbing agent 23 in the temperature zone (b) having a self-temperature of the hot-rolled thick plate to be transferred (ii). The heat-resistant sound-absorbing material 26 is filled in the hollow portion 25 of the first steel sleeve 24, the first steel sleeve 24 is sandwiched in the ceramic sleeve 27, and the ceramic sleeve 27 is second. Arranging at least one roll selected from the rolls B2 fitted in the steel sleeve 28; In the temperature zone (C) in which the hot rolled plate to be transported has its own temperature of 250 ° C. or less, (i) the roll C1 having the same structure as the roll B1, and (ii) the hollow portion 30 of the steel sleeve 29. Heat-resistant sound-absorbing material 31 is filled in the outer peripheral surface of the steel sleeve 29, a plurality of rings (C2) made of non-woven fabric and (iii) the exposed surface of the ring 32 on the outer peripheral surface of the roll (C2) steel cap And arranging one or more rolls selected from the rolls C3 wrapped by (33).

Images