JP5152497B2 - Hot or warm rolling mill - Google Patents

Description

  The present invention relates to a hot or warm rolling mill for heating and rolling a material to be rolled such as a thick plate or a thin plate.

  2. Description of the Related Art Conventionally, as this type of hot or warm rolling mill, a structure having a pair of upper and lower rolling rolls capable of rolling a material to be rolled and a bearing portion that holds the rolling roll is known.

Thus, the material to be rolled is heated by a heating furnace or the like, and if necessary, the surface of the rolling roll is heated by a heater such as a burner, and the material to be rolled is passed between a pair of upper and lower rolling rolls. Hot rolling is performed.
JP-A-5-293529 Japanese Patent Laid-Open No. 11-197703

  However, the rolling roll is composed of a roll portion and a shaft portion protruding from both sides of the roll portion, and the shaft portion of the rolling roll becomes high temperature by heating the material to be rolled and the rolling roll, and the shaft portion is held by the high temperature heat. This adversely affects the bearing and the oil seal of the bearing portion, and has a disadvantage that it may cause a decrease in bearing performance.

The present invention aims to solve these disadvantages. Among the present inventions, the invention according to claim 1 holds a pair of upper and lower rolling rolls capable of rolling a material to be rolled and the rolling rolls. A hot or warm rolling mill provided with a bearing portion, wherein the at least one rolling roll is formed in a double structure including a shaft portion and an outer tube portion, the shaft portion and the outer tube portion, An air layer portion is provided , and a plurality of groove portions are formed in the axial direction on the outer peripheral portion of the shaft-like portion as the air layer portion, and the shaft-like portion and the outer tube portion are formed by shrink fitting. The hot or warm rolling mill is characterized in that a coolant passage connected to a coolant supply source is formed in the shaft-like portion and the bearing portion .

  The invention according to claim 2 is characterized in that the outer cylinder part is provided to be exchangeable with respect to the shaft-like part.

As described above, according to the present invention, when the hot or warm rolling process is performed through the material to be rolled between the upper and lower pair of rolling rolls, the rolling roll includes the shaft-shaped portion and the outer cylinder. Since the air layer portion is provided between the shaft-like portion and the outer tube portion, heat transfer from the rolling roll to the shaft-like portion is caused by the presence of the air layer portion. It is possible to suppress the influence on the bearing and oil seal of the bearing portion that holds the shaft portion by the heat from the rolling roll, and it is possible to prevent the deterioration of the bearing performance and perform the rolling process well. In addition, as the air layer portion, a plurality of groove portions are formed in the axial direction on the outer peripheral portion of the shaft-like portion, so that the air layer portion is easily formed between the shaft-like portion and the outer cylinder portion. Furthermore, the shaft-like portion and the outer cylinder portion can be shrink-fitted. As a result, the shaft-like portion and the outer cylinder portion can be reliably joined, and further, a coolant passage connected to the coolant supply source is formed in the shaft-like portion and the bearing portion. Therefore, the shaft-like portion can be cooled, the temperature rise of the shaft-like portion and the bearing portion can be prevented, the influence of the bearing portion on the bearing and the oil seal can be suppressed, and the rolling process can be performed well. .

In the invention according to claim 2, since the outer cylinder part is provided to be exchangeable with respect to the shaft-like part, when the outer cylinder part to be rolled is deteriorated or consumed, the outer cylinder The part can be easily exchanged for the shaft-like part, and the burden of the exchange work can be reduced.

  FIG. 1 to FIG. 6 show an embodiment of the present invention. Reference numeral 1 denotes a rolling mill. In this case, a pair of upper and lower rolling rolls 3 and 3 are placed on a rolling stand 2 so as to be rotatable by bearings 4 and 4. And a drive mechanism 5 and 5 for rotating the rolling rolls 3 and 3 and a reduction mechanism 6 for reducing the upper rolling roll 3 and a heater 7 such as a burner for heating the surface of the rolling rolls 3 and 3. And a transfer mechanism 8 including a plurality of transfer rolls 8a... That can horizontally transfer the material to be rolled W and left and right guide plates 8b, and the surface temperature of the rolling rolls 3 and 3 and the temperature of the material W to be rolled. A surface temperature sensor 9 is provided for measuring, and the material to be rolled W is heated by a heating furnace (not shown) and the surface of the rolling roll 3 is heated by a heater 7 such as a burner, and the transfer mechanism 8 Roll material W is a pair of upper and lower rolling rolls. It is configured to perform hot or warm rolling process through between Le 3.3. The hot working here refers to a rolling process performed at a high temperature that is higher than the recrystallization temperature of the metal material that is the material W to be rolled, for example, in a high temperature region of 300 ° C. to 450 ° C. or higher. It refers to a rolling process performed at a temperature range between cold working, for example, 200 ° C. to 300 ° C., and cold working refers to a rolling process performed at room temperature.

  In this case, the rolling rolls 3 and 3 are formed in a double structure including a shaft portion 3a and an outer tube portion 3b, and an air layer portion R is provided between the shaft portion 3a and the outer tube portion 3b. In this case, as the air layer portion R, a plurality of groove portions 3c are formed in the outer peripheral portion of the shaft-shaped portion 3a in the axial direction, and the shaft-shaped portion 3a and the outer cylindrical portion 3b are exchangeably fitted. And the shaft 3d and the bearings 4 and 4 are formed with coolant passages 3e and 4a, and a coolant supply source (not shown) is provided in the coolant passages 3e and 4a. Are connected and configured.

  Since this embodiment has the above-described configuration, the material to be rolled W is heated by a heating furnace (not shown) and the surface of the rolling roll 3 is heated by a heater 7 such as a burner, and the material to be rolled by a transfer mechanism 8. W is passed between a pair of upper and lower rolling rolls 3 and 3 to perform hot or warm rolling processing. At this time, the rolling rolls 3 and 3 are double layers composed of a shaft-shaped portion 3a and an outer cylindrical portion 3b. Since the air layer portion R is formed between the shaft portion 3a and the outer cylinder portion 3b, the air layer portion R is transmitted from the rolling rolls 3 to the shaft portion 3a due to the presence of the air layer portion R. The heat transfer can be suppressed, the influence on the bearing and oil seal of the bearing part that holds the shaft part by the heat from the rolling rolls 3 and 3 can be suppressed, the deterioration of the bearing performance is prevented, and the rolling process Can be performed satisfactorily.

  In this case, since the groove part 3c is formed in the outer peripheral part of the shaft-like part 3a as the air layer part R, the air layer part R is easily formed between the shaft-like part 3a and the outer cylinder part 3b. In this case, the shaft-shaped portion 3a and the outer tube portion 3b are coupled by shrink fitting, so that the shaft-shaped portion 3a and the outer tube portion 3b can be reliably coupled. In this case, since the outer cylindrical portion 3b is provided to be exchangeable with respect to the shaft-shaped portion 3a, when the outer cylindrical portion 3b to be rolled is deteriorated or consumed, the outer cylindrical portion 3b is The shaft portion 3a can be easily replaced, and the burden of replacement work can be reduced. In this case, the coolant passage 3e is formed in the shaft portion 3a. The portion 3e can be cooled, the temperature of the shaft-like portion 3a and the bearing portion 3 is prevented from rising, and the bearing and oil of the bearing portion 3 are prevented. It is possible to suppress the influence of the seal, it can be performed well rolled.

  In addition, this invention is not restricted to the said embodiment, For example, the structure of the rolling mill 1, the rolling roll 3, the bearing part 4, etc. are designed and changed suitably, Moreover, the said embodiment In the example, the pair of upper and lower rolling rolls 3, 3 are formed in a double structure composed of the shaft-shaped portion 3a and the outer cylindrical portion 3b, but this structure can be applied only to at least one of the rolling rolls 3. .

  As described above, the intended purpose can be sufficiently achieved.

1 is an overall side view of an embodiment of the present invention. 1 is an overall plan view of an embodiment of the present invention. It is a sectional side view of the example of an embodiment of the invention. It is a side view of the example of an embodiment of the invention. It is a plane sectional view of an example of an embodiment of the invention. It is a partial cross-sectional view of the embodiment of the present invention.

W Rolled material R Air layer part 3 Roll roll 3a Shaft part 3b Outer cylinder part 3c Groove part 3e Coolant passage 4 Bearing part

Claims (2)

A hot or warm rolling mill comprising a pair of upper and lower rolling rolls capable of rolling a material to be rolled and a bearing portion for holding the rolling roll, wherein the at least one rolling roll includes a shaft portion and an outer cylinder portion The air layer portion is provided between the shaft portion and the outer cylinder portion, and a plurality of groove portions are formed in the axial direction on the outer periphery of the shaft portion as the air layer portion. The shaft-shaped portion and the outer cylinder portion are joined by shrink fitting, and a cooling fluid passage connected to a coolant supply source is formed in the shaft-shaped portion and the bearing portion. Features hot or warm rolling mill. The outer cylindrical portion is hot or warm rolling machine according to claim 1, wherein the provided freely exchange with respect to the pivot portion.

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