KR101053373B1 - Ball roll for preventing slip and manufacturing method - Google Patents

Abstract

The present invention forms a silicon carbide abrasive grain layer on the surface to prevent slippage between the material and the roll caliber to prevent rolling troubles, and to prevent the formation of scale by preventing contact of the coolant with the caliber in the atmosphere. It relates to a process roll for preventing and a method of manufacturing the same.

The present invention is used in a billet rolling machine, the surface of the ball is formed by inserting the caliber rolled into the material, the inorganic adhesive layer attached to the surface of the caliber; and attached to the inorganic adhesive layer to form a rough surface It provides a ball roll and a manufacturing method for preventing slip comprising a silicon carbide abrasive grain layer.

According to the present invention, the rough surface enables smooth insertion of the rolled material to prevent rolling troubles. In addition, the caliber of the air rollers in the atmosphere has an effect of preventing the penetration of cooling water, water vapor, or air to prevent the generation of scale on its surface.

Ball roll, caliber, slip prevention, rolling trouble prevention, scale generation prevention

Description

Ball roll for preventing slip and manufacturing method thereof {A ROLL APPARATUS TO PREVENT SLIP AND METHOD PRODUCING IT}

1 is a view in which a rolled material is inserted into a new roll or a turning roll according to the conventional art.

         As a detailed view showing the state,

        a) is a side view, b) is a sectional view;

2 is a configuration diagram in which an adhesive applying device and an air injector are arranged in a roll turning machine to manufacture a ball roll according to the present invention;

3 is a view showing in detail the inorganic adhesive layer and silicon carbide abrasive grain layer of the ball roll according to the present invention,

         a) is a longitudinal cross-sectional view; b) is an appearance structural diagram;

4 is an enlarged view showing in detail an inorganic adhesive layer and a silicon carbide abrasive grain layer of a ball roll according to the present invention;

         a) is a schematic structural diagram, b) is a longitudinal cross-sectional view;

5 is an operation explanatory diagram of a ball roll having a rough surface according to the present invention;

FIG. 6 is a configuration diagram in which ball rolls having a rough surface according to the present invention are arranged in-line by being connected in series by multiple stages.

       <Description of the symbols for the main parts of the drawings>                 

1 .... ball roll 10 .... inorganic adhesive layer

20 .... Silicon carbide abrasive grain layer 30 .... rough side

50 .... Roll Turning Machine 60 .... Inorganic Adhesive Applicator

70 .... air sprayer 200 .... roll

200a .... turning roll 210 .... caliber

250 .... Billet 252 .... Tip

300 .... coolant

The present invention relates to a ball roll used in a rolling mill for rolling billets, and more particularly, to form a silicon carbide abrasive grain layer on the surface thereof to prevent slippage between the material and the roll caliber to prevent rolling trouble, and It relates to a ball roll for improved slip prevention and a method of manufacturing the same to prevent contact of the coolant with the caliber to prevent the generation of scale.

In general, the production process of billets in an integrated steel mill is made of a heating process for heating the blooms at a constant temperature, and various types of materials heated at a constant temperature in this way to make a cross section suitable for finishing rolling processes. The main is divided into rough rolling process and finishing finishing process to finish-roll the roughly rolled material to the desired size.                         

In the above-described process, the finishing rolling process continuously passes the material through a ball roll having a different reduction rate, and rolls it into a billet of a desired size.

Such a billet rolling machine is generally comprised only by the horizontal rolling mill, and the case where the horizontal rolling mill and the vertical rolling mill are alternately provided.

In the finishing rolling process for billet rolling, the roll used in the rolling mill is used by turning a plurality of ball calibers (CALIBER) in one roll, and when producing a certain amount of billet (BILLET), due to the wear of the caliber It should be replaced and repaired, and rolls should be replaced when multiple calibers are used.

In this way, turning multiple calibers on one roll makes it easy to change the size of billets, reduce roll replacement times, reduce roll replacement times, reduce gas and power sources, increase productivity, and control quality. And so on.

Due to these characteristics, when the first caliber is processed and used on a flat roll type roll, it is called a 'new roll', and when a plurality of calibers formed on the new roll are used, the surface of the caliber is reprocessed. Smooth it out. Then, the roll thus processed is installed and used again in the rolling mill, and when the caliber is worn again, the processed roll is used again. The roll thus processed is referred to as a 'turning roll'.

In other words, the roll used in the billet rolling machine is a new roll-> rolling-> turning-> rolling-> turning-> rolling (repeats several times above)-> disposal. .

In this way, the surface of the new roll or the turning roll is formed with a very smooth surface by precision machining, and the pure metal which is not oxidized is directly in contact with the air.

Therefore, due to the conditions described above, the draw rolls or the turning rolls have two problems.

The first problem is that since the surface of the roll is very smooth, as shown in Figs. 1 a) and b), the conventional ball roll 200 of the rolling mill has a caliber (or roll) of a new roll or a milled roll 200a. When inserting the rolled material 250 between the 210, the contact portion between the material edge 252 and the caliber 210 is small, the material 250 due to the smoothness of the surface of the roll caliber 210 Does not pass through the center of the caliber 210, the slip does not enter for rolling while the operation is repeated, the operation is repeated.

As a result, a roll is cracked and a rolling trouble is generated by continuously generating an impact on the roll 200a. In order to cope with such a problem, the conventional roll 200 is to improve the surface roughness by knurling (KNURLING) in the face of the caliber.

Such a knurling process is to artificially form grooves of a predetermined depth on the roll surface in the course of turning by crossing each other, or to form irregularities on the roll surface by processing V-shaped grooves. In addition, such a knurled groove significantly consumes a roll surface machining time, thereby significantly lowering productivity of maintenance work and causing an increase in maintenance cost.

In addition, the knurled grooves thus formed are effective in the initial dentition to some extent, but are not sufficient to secure the tooth input, and accordingly, in the process of injecting the hot material into the caliber of the roll, sand (fine) Was spraying). In this way, when sand is introduced to prevent slippage between the caliber surface and the material, the penetration performance is improved by the increased frictional force, but it is very cumbersome to continuously add sand. As the knurled groove is in continuous contact with the material, the knurled groove appears as roll marks on the surface of the billet 250 which is the final product, causing quality defects.

On the other hand, another problem with the above is that the surface of the roll is turned in a turning machine, so that the non-oxidized metal is exposed to air, and oxidation proceeds on the surface of the caliber 210 of the roll to generate scale on the surface. To lose. Such an oxidizing scale causes a large defect on the surface of the billet during rolling, and also acts as a factor that hinders contact between the surface of the caliber and the material in the insertion process, thereby making it difficult to insert the material.

Conventionally, in order to prevent the caliber of the roll whose surface was turned in this way from being oxidized in air | atmosphere and the scale generate | occur | producing on the surface, the anti-scaling band board was attached to the ball roll.

It has a structure that connects the steel strip clip and the steel strip to the fixing portion, and attaches a rubber plate forming the bottom surface and the outer edge surface of the anti-scaling strip plate, and seals the caliber of the roll using this. Doing. However, when applied to such a roll driving the prior art, because the material is a high temperature deterioration of the rubber plate in contact with it, the loss of time and manpower caused by the installation and removal work, and the fixed bolt during use As a result, the sealing force decreases due to the lowering of the fixing force.

For this reason, without using such a conventional technique, the roll is assembled to a rolling apparatus, and in this case, Kelly is continuously rolled due to the cooling water 300 sprayed to cool the hot roll 200a. The scale is not generated in the bur 210 due to friction with the material 250, but is generated in the caliber 210 that is not used and is waiting.

Therefore, even when the rolled material 250 is inserted into the caliber 210 after the caliber 210 is replaced, the rolled material 250 slips and slips due to iron oxide, causing rolling problems. The caliber 210 has a problem of carrying out cumbersome grinding work to remove iron oxide before use, or spraying sand manually in the process of injecting the material 250 into the caliber 210. .

The present invention is to solve the above conventional problems, the object of which is to eliminate the conventional knurling (knuling) process to improve the workability of the roll, improve the surface quality of the billet, caliber and rolled material Provided are a roll for improving slip prevention and a method of manufacturing the same to increase friction with and improve rolling property.

In addition, the present invention suppresses the slip with the rolled material in the caliber of the new roll and the turning roll, and prevents the generation of scale by the sprayed cooling water to prevent the slip to eliminate the need for grinding work for removing the surface scale of the caliber The object is to provide a roll and a method of manufacturing the same.

In order to achieve the above object, the present invention is used in a billet rolling machine, in the surface of the ball roll formed with a caliber is inserted into the material is rolled,

An inorganic adhesive layer attached to the caliber surface; and

The silicon carbide abrasive grain layer is attached to the inorganic adhesive layer to form a rough surface; by providing a ball roll for preventing slip, characterized in that it comprises a.

In addition, the present invention is used in a billet rolling machine, in the manufacturing method of a ball roll formed with a caliber to be rolled by inserting the material on the surface,

Turning the caliber surface;

Applying an inorganic adhesive layer to the turned surface; and

By attaching and curing the silicon carbide abrasive grain layer on the inorganic adhesive layer to form a rough surface; by providing a method for producing a ball roll for preventing slips, characterized in that it comprises a.

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

The ball roll 1 for preventing slip according to the present invention is an inorganic adhesive layer 10 attached to the surface of the caliber, and silicon carbide abrasive grains attached to the inorganic adhesive layer 10 to form a rough surface 30. Layers 20.

In the present invention, when the caliber 210 of the rolling mill roll 200a is turned in the roll turning machine 50 as shown in FIG. 2, the surface is present in the form of a pure metal free of foreign matters. Since there is no foreign matter on the surface, when the adhesive object is bonded, it has very good adhesion.

Therefore, when turning of the caliber 210 is completed, the surface of the caliber 210 is formed on the surface of the caliber 210 in order to form the rough surface 30 of the caliber 210 in FIG. As shown, the black silicon carbide abrasive grain layer 20 is attached using the high temperature inorganic adhesive layer 10.

In order to attach the silicon carbide abrasive grain layer 20 as the inorganic adhesive layer 10 in the above, as shown in FIG. 2, an injection nozzle for applying the inorganic adhesive layer 10 to one side of the roll turning machine 50. Or other applicator 60. Since the coating device 60 may use a general known technique, it will not be described in detail.

Then, the inorganic adhesive layer 10 is applied to the face of the caliber 210 with a predetermined thickness, and the silicon carbide abrasive grain layer 20 is sprayed and adhered thereto. In the above, the inorganic adhesive layer 10 may use various coating cements having a maximum use temperature of 1200 ° C. to 1700 ° C., and the thickness of the inorganic adhesive layer 10 is about 1 mm, and the curing time is about 24 hours at room temperature. In addition, the silicon carbide abrasive grain layer 20 has a diameter standard of about 0.2 to 2.0 mm, and various kinds of silicon carbide abrasive grain layers 20 containing silicon carbide (SiC) may be used.                     

The silicon carbide abrasive grain layer 20 is sprayed to be densely embedded in the inorganic adhesive layer 10 using the air sprayer 70, and then molded and cured at room temperature for a predetermined time. Maintaining a strong bonding force by the thermal power, the silicon carbide abrasive grain layer 20 is formed with a plurality of grooves and grooves are formed, accordingly, the surface of the caliber 210 is an inorganic adhesive layer 10, silicon carbide Two elements of the vaginal abrasive grain layer 20 are coated to form a rough surface 30 in the form of a band on the surface of the caliber 210.

The caliber 210 of the ball roll 1 according to the present invention having such a rough surface 30 is increased by the frictional force with the material 250 in the billet finishing rolling process to prevent the occurrence of slip with the rolling material 250, It is to have the effect of preventing the generation of scale by preventing the penetration of the cooling water 300 to the surface portion of the caliber 210.

3 and 4 show in more detail the ball roll 1 formed according to the invention.

In the mold roll 1 of the present invention, a high temperature inorganic adhesive layer 10 layer is formed on the surface of the caliber 210, and two elements of the black silicon carbide abrasive grain layer 20 are matched thereon to form a band. A rough surface 30 of is formed on the surface of the caliber 210 in the form of a groove and a groove.

In the above, the inorganic adhesive layer 10 is applied to the surface of the caliber 210 with a predetermined thickness to serve to bond and maintain the black silicon carbide abrasive grain layer 20.

The silicon carbide abrasive grain layer 20 having a predetermined particle size is formed by spraying it onto the inorganic adhesive layer 10 to be densely packed using an air injector, and curing the adhesive layer 10 when a predetermined time elapses at room temperature. It is fired by the action, and maintains a strong bonding force by the fixing force of the adhesive layer 10, the abrasive grain layer 20 in the form of a 홈 groove and ∩ groove in the form of rough surface 30 on the surface of the roll caliber 210 It is installed in the form of a strip.

Hereinafter, a method for producing a ball roll having a rough surface in order to prevent slippage according to the present invention will be described. The method of manufacturing a ball roll of the present invention first has a step of turning the caliber 210 surface. This uses a roll turning machine 50 as in the prior art, and after the turning step, the step of applying the inorganic adhesive layer 10 to the turned surface is made.

As shown in FIG. 2, it is possible to use the injector or the applicator 60 located on one side of the roll turning machine 50, but alternatively it may be done by hand.

That is, the high temperature inorganic adhesive layer 10 having a maximum use temperature of 1400 ° C. may be applied to the roll caliber 210 using a spatula knife at a predetermined thickness.

In addition, the coating step of the inorganic adhesive layer 10 may include a step of forming the rough surface 30 by attaching and curing the silicon carbide abrasive grain layer 20 to the inorganic adhesive layer 10. That is, by spraying and molding the black silicon carbide abrasive grain layer 20 to be densely packed using the air sprayer 70 using the air injector 70, and after a predetermined time has elapsed at room temperature, the adhesive cures. By the action, the inorganic adhesive layer 10 and the abrasive grain layer 20 are combined into two elements so that the rough surface 30 in the form of a band is cured and calcined on the surface of the caliber 210 by the chamfer groove and the chamfer groove.

As shown in FIGS. 5 and 6, the ball roll 1 of the present invention is provided with a caliber 210 having a strip-shaped rough surface 30 formed of a groove and a groove. Increasing the friction force to suppress the slip when the rolled material 250 in the first rolling mill, and also to prevent the rolling trouble by suppressing the slip of the material 250 by the slip in the continuous rolling mill.

In addition, the caliber 210 of the roll 200 in which the rough surface 30 is provided with the groove | channel groove and groove | channel groove suppresses the internal penetration of the cooling water 300 which the inorganic adhesive layer 10 sprays during rolling, It serves to prevent the generation of scale on the plurality of roll caliber (210).

As shown in FIGS. 5 and 6, the ball roll 1 of the present invention manufactured as described above is fitted with two elements of the high temperature inorganic adhesive layer 10 and the black silicon carbide abrasive grain layer 20. When the rolled material 250 is inserted between the calibers 210 by having a stripe rough surface 30, the edge 252 of the rolled material 250 slips due to the rough surface 30. Without passing through the center of the caliber (210).

At this time, the inorganic adhesive layer 10 and the silicon carbide abrasive grain layer 20 are broken and peeled off by the generated rolling load and friction, and are removed by the cooling water sprayed on the ball roll 1, and the rolled material 250 ) Is in contact friction with the surface portion of the caliber 210, the rough surface 30 is peeled off is formed in the caliber 210 by affinity by continuous rolling.

Therefore, continuous rolling is normally performed, and it is possible to produce billets of a desired size in a short time. On the other hand, the present invention in the above can also produce the roll 1 in a state that does not adhere the silicon carbide abrasive grain layer 20 on the inorganic adhesive layer (10). The inorganic adhesive layer 10 effectively covers the turning surface of the caliber 210 to effectively prevent the caliber 210 from being oxidized in the working atmosphere.

As described above, according to the present invention, when the ball roll 1 is used, the rough surface 30 formed on the surface of the caliber 210 to prevent slippage can be smoothly inserted into the rolled material 250. This prevents rolling troubles.

In addition, the caliber 210 of the atmospheric roll 1 is prevented from infiltration of the cooling water 300, water vapor, or air, thereby preventing the generation of scale on the surface thereof and thus eliminating the surface scale of the caliber. No cumbersome grinding work for the need, smooth the insertion of the rolled material 250, it is effective in preventing rolling time delay, abrupt processing, billet material cost increase.

On the other hand, in the above, the present invention has been described and used as applied to the rolling steel sheet, but the present invention is not limited to this, the rolling of various metals having different kinds of materials, for example, various rolling including non-ferrous metals Of course, it can be applied to the roll.

Claims (4)

In the ball roll which is used in a billet rolling machine and formed the caliber to which the raw material is inserted and rolled, An inorganic adhesive layer attached to the surface of the caliber; and And a silicon carbide abrasive grain layer attached to the inorganic adhesive layer to form a rough surface. The ball roll for preventing slip of claim 1, wherein the particle size of the silicon carbide abrasive grain layer is 0.2 to 2.0 mm in diameter. In the manufacturing method of the ball roll which used the billet rolling machine and formed the caliber by which the raw material is inserted and rolled, Turning the surface of the caliber; Applying an inorganic adhesive layer to the turned surface; and And attaching and hardening a silicon carbide abrasive grain layer on the inorganic adhesive layer to form a rough surface. The method according to claim 3, wherein the inorganic adhesive layer is to prevent the formation of a roll on the roll caliber in the air to prevent the formation of scale rolls by suppressing the internal penetration of the cooling water, water vapor or air sprayed during rolling Way.

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