KR100861944B1 - Table roller for rolled steel removal - Google Patents

Abstract

A table roller for transporting a rear plate is provided to reduce noise, prevent damage of a rolled steel by winding Heat-resistant fibers on rollers, and reduce installation costs by installing space rings between the heat-resistant fibers in a predetermined gap. A table roller is installed with a plurality of rollers(20) to transport a rolled steel(11) rolled from a rear plate rolling mill(10). Heat-resistant fibers(25), which are ring-shaped at an outside of roll shafts(21), are separated from an outer peripheral surface of the table roller. Space rings(23) are placed between the Heat-resistant fibers and fitted to the roll shafts. The Heat-resistant fibers are attached at outer peripheral surfaces of fiber fixing rings which are fitted to an outer peripheral surface of the roll shafts. High heat-resistant fibers(26) are formed on outer peripheral surfaces of front rollers(FR). Low heat-resistant fibers are formed on outer peripheral surfaces of rear rollers(RR).

Description

Table roller for rolling plate transport {Table roller for rolled steel removal}

1 is a perspective view showing a structure and an operating state of a table roller according to the present invention.

2 is an individual cross-sectional view of the table roller according to the invention.

3 is a cross-sectional view taken along the line A-A of Figure 2 showing a first embodiment.

4 is a cross-sectional view taken along the line A-A of Figure 2 showing a second embodiment.

5 is a cross-sectional view taken along the line B-B in FIG.

<Description of Symbols for Main Parts of Drawings>

10: rolling mill 11: rolled steel

20: table roller 21: roll shaft

22: key 23: space ring

24: fiber fixing ring 25: low heat resistant fiber

26: high heat resistant fiber

The present invention relates to a table roller structure in which a plurality of rollers are rolled out at regular intervals in order to transfer the rolled steel drawn out from the rolling mill to a desired place, and more specifically, to prevent impact and noise generated between the rolled steel and the roller. Yet, the present invention relates to a table roller structure for plate transport, which reduces installation and maintenance costs.

Rolling in steel mills, especially thick plate factories, uses a hot rolling mill equipped with two rotating rolls to produce various forms, such as plates, by pressing a hot or cold metal material between two rolls. It is to do.

Such rolling is less expensive than casting or forging, and it is the most commonly used metal processing method because it can produce products with uniform dimensions and materials. Hot rolling is usually performed at high temperature and cold at low temperature. It is roughly classified by rolling.

Hot rolling is somewhat different depending on the product, but most of the heating, rough rolling, intermediate rolling, finishing mill (FM), cooling and cutting steps are carried out sequentially. In order to move the pressurized rolled steel to a desired place, a plurality of rollers are rotatably extended on the exit side of the rolling mill so that the rolled steel is conveyed by the rolling action of each roller.

Since such rolled steel is drawn out in a very high temperature state, the rollers in direct contact with it should be heat resistant and durable.

Therefore, although the roller is made of a metal material, since the plurality of rollers are installed at a certain distance, when the rolled steel moves by sliding the upper part of the roller, the front and rear ends of the rolled steel are impacted by hitting the outer peripheral surface of each roller. Of course, due to this there is a disadvantage that the noise is severely generated, and furthermore, the repeated impact applied to the rolled steel may change the durability or characteristics of the rolled steel itself.

To this end, even if the roller and the rolled steel collide with each other, the impact can be absorbed from either side, and at the same time, a heat resistant louver capable of withstanding a certain amount of heat is attached to the outer circumferential surface of the roller. Considering that the temperature is about 350 ° C., while the temperature is about 650 ° C. immediately after the withdrawal of the rolled steel, the heat resistant louver is limited in that it can be installed only in the rear position where the rolled steel is cooled to some extent.

In addition, considering that the rubber material is weak in impact and strength, the heat resistant louver is frequently replaced with a high rate of breakage such as thermal hardening due to frequent contact with the rolled steel and tearing due to impact with the rolled steel. There is a problem that maintenance costs are high.

The object of the present invention devised to solve these problems is to absorb the shock when the rolled steel is seated and transported on the roller to reduce the noise, to prevent the rolled steel from being broken, and to reduce the cost of installing and maintaining the shock absorber. The present invention provides a table roller structure for transporting a thick plate, which can be reduced and has sufficient heat resistance and durability to withstand the initial drawing temperature of the rolled steel.

In order to achieve the above object, the present invention provides a table roller in which a plurality of rollers are rolled out so as to transfer a high-temperature rolled steel rolled from a rolling mill, wherein heat-resistant fibers are wrapped on the outer circumferential surface of each roller, and the front side close to the rolling mill. The outer circumferential surface of the roller is provided with at least one first roller wrapped with high heat resistant fiber, and the outer circumferential surface of the rear roller is provided with at least one second roller wrapped with low heat resistant fiber, and the high heat resistant fiber is low In addition to being attached to the outer circumferential surface of the heat resistant fiber, each heat resistant fiber is formed in a ring shape at regular intervals on the outer circumferential surface of the table roller, and interposed between each heat resistant fiber to reduce installation costs.

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

1 is a perspective view showing a structure and an operating state of a table roller according to the present invention, Figure 2 is an individual cross-sectional view of the table roller according to the present invention.

As shown in FIG. 1, the rolled steel 11 rolled from the rolling mill 10 in a high temperature environment is moved to a desired place by a rolling action of a plurality of rotatable rollers 20. Heat-resistant fibers are adhered to the outer circumferential surface of the roller 20 to prevent the impact noise between the rolled steel 11 and each roller 20 to reduce the impact noise.

At this time, the heat-resistant fiber can be obtained in a variety of economic benefits by mixing the high heat-resistant fiber 26 and the low heat-resistant fiber 25 in a specific position, which will be described in detail later.

The high heat resistant fiber 26 has a maximum heat temperature in the range of 600 to 700 ° C., for example, PBO fiber (PBO: polyparaphenylene benzobis) such as 'ZYLON' (trade name) produced by TOYOBO, Japan. Oxazole; Poly [2,2- (m-phenylene) -5,5-benzimidazole]) or a fiber having equivalent properties thereto.

PBO fiber is 42g / d (5.8GPa), twice the level of para-aramid fiber, and has excellent creep resistance, chemical resistance, light resistance, flame retardancy, and shape stability. 68 is the best flame retardant resin present.

On the other hand, the low heat resistant fiber 25 is an aromatic polyamide fiber called ARAMID, such as 'KEVLAR' (trade name) of DuPont, USA, having a maximum heat resistance temperature of 300 to 400 ° C. It may be a fiber with uniform properties.

Aramid fibers have a tensile strength of 4000,000 lb / m 2 and an elastic modulus of 9 × 10 ⁵ lb / m 2, which are useful in industries such as ropes, cables, and bulletproof clothing.

In applying this heat resistant fiber to the rolling table roller 20, first, the high heat resistant fiber is expensive, and while the initial temperature is high when the rolled steel 11 is drawn out, while being transferred through the table roller 20, It should be noted that the temperature cools down gradually.

Accordingly, as shown in FIG. 1, a first roller 20a is provided on the outer circumferential surface of the front side roller FR close to the rolling mill 10 so that the high heat resistant fiber 26 is wrapped to provide an initial high temperature of the rolled steel together with shock absorption. On the outer circumferential surface of the rear side roller RR, which is far from the rolling mill 10, a second roller 20b for wrapping the low heat resistant fiber 25 is provided to reduce the temperature with shock absorption. It is desirable to be in contact with the rolled steel.

Of course, the position or quantity of the first roller 20a and the second roller 20b is not limited to the illustrated example, and at least one first roller 20a and the second roller 20b may be provided as necessary. Can be.

In a more preferred embodiment, as shown in Figure 2, the heat resistant fibers 25, 26 are in the form of a ring to be wrapped around the outer circumferential surface of the table roller 20, while maintaining a constant distance through the space ring 23. It is desirable to provide spaced apart.

The advantage of such a structure is that if the heat-resistant fiber is attached to the entire surface of the roller 20, the whole part must be replaced when the breakage or replacement is required, but the heat-resistant fiber is interposed by the space ring 23 as in the present invention. However, if the height of the heat-resistant fiber higher than the space ring 23, the heat-resistant fiber is in contact with the rolled steel 11, without having to replace the entire heat-resistant fiber, only one damaged broken, installation and maintenance costs Will reduce the cost.

Reference numeral 21, which is not described, is a 'roll shaft' in which the roller 20 is a rotation axis. Hereinafter, the cross-sectional structure of each roller 20 will be described with reference to FIGS.

3 is a cross-sectional view taken along line AA of FIG. 2 and shows a cross-sectional structure of a first roller 20a to which high heat resistant fiber is attached, which is a first embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line AA of FIG. The cross-sectional structure of the second roller 20b to which the low heat resistant fiber is attached as the second embodiment is shown.

3 and 4, a fiber fixing ring 24 made of a metal material is attached to the outer circumferential surface of the roll shaft 21, which is a rotating shaft of the roller, and the fiber fixing ring 24 is a means for fixing heat resistant fibers. The fiber fixing ring 24 and the roll shaft 21 are firmly fixed so as not to rotate with each other through the key 22.

At this time, in the case of the second roller 20b, only the low heat resistant fiber 25 having a predetermined thickness is attached to the outer circumferential surface of the fiber fixing ring 24 and installed on the rear roller RR as described above. In the case of 20a), the low heat resistant fiber 25 of a predetermined thickness is attached to the outer peripheral surface of the fiber fixing ring 24, and then the high heat resistant fiber 26 is attached thereto.

Of course, the first roller 20a may also directly attach the high heat resistant fiber 26 to the outer circumferential surface of the fiber fixing ring 24, but since the high heat resistant fiber is very expensive, it is relatively inexpensive low heat resistant fiber ( It is desirable to maintain a thickness that is capable of absorbing the impact through 25, and then attach the high heat resistant fiber 26 thereon.

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 2, wherein the space ring 23 interposed between the heat resistant fibers is also fixed to the outer circumferential surface of the roll shaft 21 by a key 22 so as not to rotate.

In the table roller structure as described above, to replace the heat-resistant fibers of any particular part, the fiber fixing ring 24 and the space ring 23 are sequentially separated from the roll shaft 23 in the corresponding roller 20. , After removing the fiber fixing ring 24 fixing the heat-resistant fiber that needs to be replaced, replace it with another one and assemble sequentially.

Although the present invention has been described only with respect to the illustrated limited embodiments, the present invention is not limited to the illustrated embodiments, and various modifications and changes may be made without departing from the spirit of the present invention. It is within the scope of the following claims.

According to the table roller structure for thick plate conveyance of the present invention described above, the heat-resistant fiber sensitized on the roller when the rolled steel is seated and transported to the roller absorbs the shock to reduce noise and prevent breakage of the rolled steel, Since the installation is spaced at regular intervals, the installation cost is low, and only a part of the broken heat-resistant fiber can be replaced, thereby maintaining a low maintenance cost.

Furthermore, when the high heat resistant fiber and the low heat resistant fiber are arranged differently according to the distance from the rolling mill, the heat resistant fiber can be appropriately adapted to the heat temperature of the rolled steel, and when the high heat resistant fiber is applied by reinforcing the low heat resistant fiber in the high heat resistant fiber. By minimizing excessive installation, it is economical and durable and has a very maintained effect of improving productivity.

Claims (9)

In a table roller in which a plurality of rollers 20 are rolled up so as to transfer the rolled steel 11 rolled from a thick rolling mill 10, The outer surface of the roll shaft 21 constituting the roller 20 in the form of a ring is formed on the outer circumferential surface of the table roller 20 spaced apart at regular intervals is wrapped, the roll shaft ( 21 is interposed between the space ring 23, each of the heat-resistant fibers 25 is a table roller, characterized in that attached to the outer peripheral surface of the fiber fixing ring 24 wound on the outer peripheral surface of the roll shaft (21) . delete delete The method of claim 1, The high heat resistant fiber 26 is wrapped on the outer circumferential surface of the front roller FR close to the rolling mill 10, and the low heat resistant fiber 25 is wrapped on the outer circumferential surface of the rear roller RR located at a distance from the rolling mill 10. ) Is wrapped around the table roller. The method of claim 4, wherein The maximum heat resistance temperature of the high heat resistant fiber is in the range of 600 ~ 700 ℃, the maximum heat resistance temperature of the low heat resistant fiber is in the range of 300 ~ 400 ℃ range. The method of claim 5, The high heat resistant fiber (26) is a PBI (p-phenylene-2,6-benzobisoxazole) fiber or a table roller, characterized in that the equivalent heat resistant fiber. The method of claim 5, The low heat resistant fiber (25) is an aramid (ARAMID) fiber or a heat resistant fiber equivalent thereto. The method of claim 4, wherein The high heat resistant fiber (26) is a table roller, characterized in that attached to the outer peripheral surface of the low heat resistant fiber (25) attached to the outer peripheral surface of the fiber fixing ring (24). The method of claim 1, A table roller, characterized in that the fiber fixing ring (24) and the space ring (23) are fixed to each other by a roll shaft (21) and a key (22), respectively.

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