JPS61269908A - 1-stand multi-passes rolling mill - Google Patents

Abstract

PURPOSE:To cool or heat efficiently intermediate rolls and to prevent the generation of a heat crown by forming a fluid supply hole to the inside of each of the intermediate rolls, inserting a fluid introducing pipe into the hole and controlling the temp. of the rolls. CONSTITUTION:The liquid supply hole 9 provided with an aperture 8 at one shaft end side is formed to the axial central part of each of the intermediate rolls 2, 3 of a 1-stand multi-passes rolling mill. The fluid introducing pipe 10 opened at the top end is inserted into the hole 9. The cooling fluid is supplied through the pipe 10 and the aperture at the top end thereof into the deepest part of the holes 9 formed into the rolls 2, 3. The cooling fluid passes further the space between the hole 9 and the pipe 10 and cools the rolls 2, 3 from the inside and is then discharged. The rolls 2, 3 are heated up by supplying the high-temp. fluid thereto in the starting stage of rolling, by which the effect of roll bending is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a one-stand multi-pass rolling mill that prevents deterioration of the shape of a plate due to heat crown of work rolls.

[Prior Art] A one-stand multi-pass rolling mill has a method of rolling a plate 5 by winding it around intermediate rolls 2 and 3 of work rolls 1, 2, and 3.4 in an S-shape, as shown in Fig. 3. , a deflector roll 6.7 is provided as shown in FIG.
A method has been proposed in which the wire is not wrapped around the wire. In such a rolling mill, rolling the hot plate 5 causes the work rolls 1, 23.4 to overheat and generate a heat crown, causing deterioration of the shape of the plate 5. Cooling is performed by spraying a cooling fluid such as cooling water onto one outer periphery of the cylinder.

[Problems to be Solved by the Invention] However, since the intermediate rollers 2 and 3 of a one-stand multi-pass rolling mill perform rolling at two locations, and furthermore, in the system shown in FIG. Since it is wrapped around the intermediate roll 2.3, cooling is insufficient if it is simply cooled from the outside of the roll as in the conventional method. Further, even in the system provided with the deflector rolls 6, 7, desired cooling cannot be achieved due to space constraints for installing a device for spraying cooling fluid. Furthermore, conventionally, since the intermediate rolls 2.3 are cold at the start of rolling, the roll bending effect is poor and the shape of the plate is deteriorated.

The present invention has been made in view of these points, and an object of the present invention is to provide a one-stand multi-pass rolling mill that can effectively cool or heat intermediate rolls.

[Means for solving the problems] The present invention attempts to solve the above technical problems, and
A fluid supply hole that opens at one shaft end is formed inside the intermediate roll of the one-stand multi-pass rolling mill, and a fluid introduction pipe for supplying temperature adjustment fluid to the fluid supply hole is inserted from the opening. This invention relates to a one-stand multi-pass rolling mill characterized by being inserted into a fluid supply hole.

[Function] Therefore, by supplying the cooling fluid into the fluid supply pipe formed in the intermediate roll by the fluid introduction pipe, the intermediate roll can be effectively cooled from inside and heat crown can be prevented.

Also, by supplying high temperature fluid through the fluid introduction pipe,
By effectively heating the intermediate roll, it is possible to enhance the roll bending effect at the start of rolling.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

Figure 1.2 shows an example of the present invention applied to the one-stand multi-pass rolling mill shown in Figures 3 and 4.
A fluid supply hole 9 with a frontage 8 provided at one end of the shaft is formed in the center of the shafts of the intermediate rolls 2 and 3 that perform rolling at two locations, and the diameter is suitably smaller than the diameter of the fluid supply hole 9. The fluid introduction tube 10 having an open end is inserted into the fluid supply hole 9.
A fluid supply pipe 11 is connected to the outer end of the fluid introduction pipe 10, and a fluid return pipe 13 is connected to the outside of the opening 8.
Connect. In the figure, 12 indicates a roll bearing, and 13 indicates a gear coupling.

In the above configuration, when the cooling fluid is supplied from the fluid supply pipe 11, the cooling fluid passes through the inside of the fluid introduction pipe 10 and is supplied from the opening at the tip to the innermost part of the fluid supply hole 9 formed in the intermediate rolls 2 and 3. The intermediate rolls 2 and 3 are cooled from inside by passing between the fluid supply hole 9 and the fluid introduction pipe 10, and then discharged to the outside. As a result, the intermediate roll 2.
3 is effectively cooled to prevent heat crown, and the shape of the plate 5 can be maintained well.

Further, at the start of rolling, the intermediate roll 2 is heated by supplying a fluid such as high temperature liquid or steam from the fluid supply pipe 11.
．． The shape of the plate can be improved by heating it up as described in step 3 to help the roll crown.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the configuration applied to the intermediate rolls may be applied to the upper and lowermost work rolls as necessary, and the cooling and heating fluids may be It goes without saying that it can be arbitrarily selected and that various changes can be made without departing from the gist of the invention.

[Effects of the Invention] As described above, according to the one-stand multi-pass rolling mill of the present invention, by providing a fluid supply hole inside the intermediate roll and supplying cooling or heating fluid, the intermediate roll can be heated internally. It is possible to effectively cool or heat the roll from the middle roll, thereby preventing the heat crown of the intermediate roll, and improving the roll bending effect by effectively heating up at the start of rolling, which makes it possible to maintain the sheet shape well. It can have a great effect.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of an intermediate roll in a one-stand multi-pass rolling mill of the present invention, Fig. 2 is a view from the ■-■ arrow in Fig. 1, and Fig.
FIG. 4 is an explanatory diagram showing two general examples of a one-stand multi-pass rolling mill. 1.2 and 3.4 are work rolls, 5 is a plate, 8 is an opening, 9 is a fluid supply hole, 10 is a fluid introduction pipe, and 11 is a fluid supply pipe.

Claims (1)

[Claims] 1) A one-stand multi-pass rolling mill characterized in that a fluid supply hole is formed inside an intermediate roll of the one-stand multi-pass rolling mill, and a fluid for temperature adjustment is supplied to the fluid supply hole. .