JPH0763735B2 - Temper rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a temper rolling mill.

[Prior Art] When temper-rolling a metal strip, there is a method of keeping the surface of a roll to be used clean in order to maintain the surface texture and prevent a flaw generated due to processing on the plate surface. As one of the means, foreign substances adhering to the surface of the roll may be constantly removed by various polishing means. Actual exploitation 54
No. 101074 proposes a means for removing dust on the surface of a work roll by using a brush roll, and Japanese Patent Laid-Open No. 57-75212 proposes a means for discharging this dust out of the system by a suction means.

[Problems to be Solved by the Invention] However, in the prior art, the target roll is limited to the work roll, and in this method, it is not possible to completely remove foreign matter adhering to the roll, Further, it is impossible to avoid the flaws of the metal strip caused by the foreign matter. That is, for example, when a dull-finished steel sheet is manufactured by a four-stage temper rolling mill, the surface roughness of the work roll is large by an appropriate means, and the hardness of the backup roll is generally low. Therefore, the work roll may cause wear.
Therefore, the effect on the surface of the steel sheet cannot be prevented unless a means for constantly removing foreign matter such as abrasion powder on the backup roll is taken by an appropriate means.
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a means for removing foreign matter generated in a rolling roll to such an extent that the surface of a steel sheet is not affected.

On the other hand, in Japanese Utility Model Laid-Open No. 54-101074, the air density for preventing heat generation due to the friction between the brush and the roll makes the brush density uneven, which causes uneven polishing on the roll surface, which is transferred to the steel plate surface. It was a cause of poor roughness.

Further, in Japanese Patent Laid-Open No. 57-75212, in order to remove dust such as abrasion powder, abrasive grains are mixed into the brush to increase the rigidity of the brush, so that the roll is flawed.

[Means and Actions for Solving the Problem] The temper rolling mill according to the present invention is provided with a brush roll that comes into contact with a work roll and a backup roll of the temper rolling mill and rotates in a direction opposite to the roll. Then, an exhaust duct is disposed in the vicinity of the brush roll, and the brush roll uses a nylon or polypropylene-based material for a work roll brush and has a cross-sectional diameter of the brush.
0.2 to 0.8 mm, and set the flocking density of the brush to the roll surface area.
55 to 85%, with or without fine abrasive grains of # 1000 or more, for the brush for the backup roll, use nylon or polypropylene material and have a cross-sectional diameter of 0.2 to 0.8 mm. And is a temper rolling mill configured by mixing # 500 to 1000 abrasive grains.

The reasons for the limitation will be described below.

First of all, the reason why the brush rolls are arranged on the work rolls and the backup rolls is that even if the brush rolls are arranged only on the work rolls, it is impossible to completely remove the foreign matter on the roll surface. The brush roll is installed in the. Even if the brush roll is rotated in the same direction as the rolling roll, the foreign matter removing effect is insufficient, so the rotation direction of the brush roll is set in the opposite direction to the rolling roll.

Regarding the material of the brush roll, when it is a metal, flaws are likely to occur on the surface of the rolling roll, and when it is a nonmetal, it is not effective when it is soft. Therefore, nylon or polypropylene materials were used.

Regarding the diameter of the cross section of the brush, if the diameter is small, there is no polishing effect, and if the diameter is large, the rolling roll is easily worn due to excessive polishing effect. Therefore, the diameter of the cross section of the brush is 0.2 ~
0.8mm

The flocking density of the brush is 55 with respect to the roll surface area.
Should be ~ 85%. The upper limit is that the brush needs to fit to the roll surface in order to obtain a good brushing effect, and the familiar brush needs to be restored to the original state at the next brushing by rotation. For this reason, it is necessary to have a margin for the flocking density, and it was set at 85%.

On the other hand, the upper limit is 55% because uneven polishing occurs on the roll surface.
And

Abrasive grains are also used to improve the brush cleaning effect, but the rolling roll is prone to wear due to its excess effect, so the grain size of the backup roll should be # 500-1000.
And In the case of work rolls, especially when performing dull rolling, in consideration of the excessive effect of abrasive grains, abrasive grains are not used, but the grain size is # 1000 or more even if used.

[Embodiment] FIG. 1 is an explanatory view showing an embodiment of the present invention. The metal strip 1 is unwound from a pay-off reel (not shown), passes through a deflector roll 2, and is temper-rolled.
And is wound by a tension reel via a deflector roll 4. The rolling mill is composed of a work roll 5 and a backup roll 6, and brush rolls 7 and 8 remove foreign matters on both rolls. The brush roll is arranged on the inlet side for the work roll and on the outlet side for the backup roll 6. A duct 9 that encloses the brush roll is provided for discharging foreign matter, and a blower 10 is attached to the outlet side thereof to discharge the foreign matter on both rolls to the outside of the system.

FIG. 2 is an enlarged view of a main part of the duct in the vicinity of the roll in FIG. The brush roll 8 is enclosed by a duct 9, the opening of which is fitted with a duct hood 11. The opening of the duct hood is changed by the power cylinder 13 via the link mechanism 12. In the practice of the present invention, the opening degree is preferably adjusted because the dust discharge capacity varies depending on the diameter and position of the work roll, backup roll, and brush roll.

Further, the effective bristle length of the brush roll should be determined in consideration of the economical efficiency of reuse by cutting hair, the restoration of the brush related to the above-mentioned bristle transplant density, that is, the uneven polishing, and the adjustment allowance of the duct hood. . In the example, it was 20 to 40 mm.

FIG. 3 is an explanatory view showing the structure of the brush rolls 7 and 8. An air supply passage 15 is provided on the brush roll shaft 14, and an outer cylinder 16 is fixedly or detachably attached to the roll shaft. The outer cylinder is provided with an air hole 19, and the brush 18 is attached to the outer cylinder together with the disk in a state of being brushed on the disk 17.
This is a structure that is considered in order to make the flocking density on the roll surface of the brush uniform.

FIG. 4 is an enlarged view of the preferred embodiment of FIG. 3, but by making the diameter of the air holes 19 larger than the thickness of the disk 17,
Air is evenly flowed from the disk to the outer peripheral surface of the brush 18. Table 1 shows the conditions of the brush of the present invention and the rolling test results.

In the example according to the present invention, the rating rate in the rolling test is 0%. The cross-sectional diameters of Comparative Examples 7 and 8 are Comparative Example 9
In the work roll flocking density, Comparative Example 10 in the work roll abrasive grain density, Comparative Example 11 in the cross-sectional diameter and work roll flocking density and abrasive grain density, Comparative Example
No. 12 is out of the invention range in the material, the cross-sectional diameter, and the abrasive grain density of the backup roll.

The temper rolling mill of the present invention can also be applied to lines such as heat treatment lines and plating lines. Further, it is preferable that the duct can expand and contract with the movement of the brush roll.

Further, the present invention can be applied to a multiple rolling mill.

[Effects of the Invention] As described above, according to the present invention, foreign matters caused by rolls are removed even during dry temper rolling, so that there is an effect of preventing contamination of strip products and improving yield.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention, and FIG.
FIG. 3 is an enlarged view of the main part of the duct in the vicinity of the roll in the figure, and FIGS. 3 and 4 are explanatory views showing the structure of the brush roll. 1 ... Metal strip, 2 ... Deflector roll, 3
…… Temper rolling mill, 4 …… Deflector roll, 5 …… Work roll, 6 …… Backup roll, 7 …… Brush roll, 8 …… Brush roll, 9 …… Duct, 10 …… Blower, 11 …… Duct hood, 12 ... Link mechanism, 13 ...
… Power cylinder, 14 …… Brush roll shaft, 15 …… Air supply passage, 16 …… Outer cylinder, 17 …… Disk, 18 …… Brush, 19 …… Air hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayuki Yamazaki 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Noboru Nakazawa, Examiner, Nihon Kokan Co., Ltd. (56) Reference JP-A-57-75212 (JP, A) ) JP-A 2-29606 (JP, A) JP-A 2-29608 (JP, A) Actually opened 64-42704 (JP, U) Actually opened 59-162108 (JP, U)

Claims (1)

[Claims] 1. A temper rolling mill is provided with a brush roll which comes into contact with a work roll and a backup roll of the temper rolling mill and rotates in a direction opposite to the roll, and an exhaust duct is provided close to the brush roll. For the brush for the work roll, a nylon or polypropylene material is used, and the diameter of the cross section of the brush is
0.2 to 0.8 mm, and set the flocking density of the brush to the roll surface area.
55-85%, mixed with fine abrasive grains of # 1000 or more or without abrasive grains, for the brush for the backup roll, use nylon or polypropylene material, and have a cross-sectional diameter of 0.2-0.8. The temper rolling mill is characterized by being configured by mixing abrasive grains of # 500 to 1000 in mm.