JPS60133907A - Method and device for grinding roll of rolling mill - Google Patents

Abstract

PURPOSE:To grind a work roll in a short time during idle time by bringing a grinding roll into contact with the work roll while moving the work roll in its axial direction. CONSTITUTION:A work roll 1 is rotated by a driving device while rotating a grinding wheel 17 by actuating a driving motor. Next, by actuating a worm reducer, the wheel 17 is pressed against the adjoining work roll 1 with a desired contacting force after turning the work roll 1 by a desired angle, to adjust the grinding depth of work roll 1. Further, by mutually moving each work roll 1 in its axial direction by a desired quantity by actuating an axially moving device, the outer circumference of each work roll 1 is ground.

Description

[Detailed Description of the Invention] 1* Industrial Ichisen Akutan) □ The present invention provides a roll for a rolling mill that enables timely grinding of the rolling roll while it is still installed in a roll chock or a rolling stand. This article relates to grinding methods and equipment.

C Prior art and some problems) ゛Hot rolling, cold rolling, etc. and rolling rolls in rolling mills
In addition to the pressure gates, the parts that contact the copper strips are worn out, and there are small marks on the surfaces.
i'lrEmM help. Then, using a rolling machine with a flat surface, the copper strip was rolled with 47M of salt.
The steel surface quality is significantly impaired; ii 7. 1-product a
This will adversely affect the accuracy of the mm measurement and cause scratches on the product surface.
B.

However, there is no need to worry about product deterioration due to rolling rolls.
However, rolls with deteriorated surface quality are transported to a maintenance shop for grinding, which results in economic losses due to reduced production efficiency. It was something that was brought about.

In addition, for the purpose of eliminating the above-mentioned drawbacks,
No. 361, Japanese Patent Laid-Open No. 52-52853, etc., disclose inventions in which a rolling mill is equipped with a grinding device to grind the roll surface at any time.

It is described that these are installed on the bed C frame of the rolling stand on the inlet or outlet side, but in reality, guide fluid piping sections are arranged in a complicated manner at the roll inlet and outlet sections, and the guide fluid piping sections are arranged in a complicated manner in the gaps between them. It is extremely difficult to arrange the above-mentioned grinding device, and this is the reason that has prevented its realization.

For the above reasons, rolling is currently performed in the order described below. For example, in the case of hot strip rolling, the wear of the work rolls rapidly wears out the roll surface corresponding to the edge of the strip width. After rolling a certain amount, when the wear on the roll surface corresponding to both ends of the strip width reaches the permissible limit, the strip is switched to a strip with a narrower strip width and rolled. This process is repeated, and after one life of the rolls has ended, the rolls are replaced. In other words, the hot strip rolling order is constrained by a schedule that starts with wide strips and then rolls narrow strips in sequence. Rolling that ignores this schedule constraint means that the rolls must be rearranged. This could not be done in practice because it would increase the frequency more than necessary, resulting in a decrease in production efficiency.

<Object of the invention> The present invention has been made in view of the above problems.
The present invention provides a roll grinding method for a rolling mill that has a simple and compact configuration, is installed in a rolling mill, has excellent grinding performance, and enables scheduleless rolling, and an apparatus for carrying out this method. be.

<Structure of the Invention> That is, the roll grinding method for a rolling mill of the present invention involves rotating a work roll in a rolling mill stand while reciprocating it in the axial direction, and grinding the outer periphery of the work with a grinding device. The roll grinding device of the present invention used to carry out the method includes a pair of work rolls that are arranged one above the other in a stand and each of which can move relative to each other in the axial direction; In a rolling mill equipped with a pair of backup rolls placed above and below each work roll so as to be in contact with the work rolls, a shaft-shaped support is attached to each backup roll chock via a bearing in parallel with each backup roll. a worm reducer that rotates each support member by a required angle by meshing with a worm gear pivotally attached to one end of each support member on the outside of the backup roll chock; By operating each worm reducer to bring the grinding wheels into contact with the respective work rolls and moving each work roll relative to each other in the axial direction, each This is configured to grind the outer periphery of a work roll, and will be described in detail below based on an embodiment shown in the drawings.

<Example> In the drawing, (1) is a pair of work rolls arranged one above the other in a stand, and each of these work rolls (1)
) is connected to the drive end of each work roll (1) via a coupling (not shown) or the like so that each can move relative to each other in the axial direction. A connected and driving movement axis (2) is provided.

In addition, (3) is a pair of backup rolls arranged so as to be in contact with the upper and lower sides of each of the work rolls (1), and C, a backup roll that supports and holds the rolls at both ends of these backup rolls (3). Roll chock (4) is
Each is provided.

Therefore, in (5), each of the backup roll chocks (
As shown in FIG. 2, the roll grinding device of the present invention is attached to each of the work rolls (1) in order to grind the outer periphery of the work roll by coming into contact with each of the work rolls (1). It is constructed.

That is, (7) is a shaft-shaped support member rotatably supported by each of the backup roll chocks (4) via bearings (6) in parallel with each of the backup rolls (3); A worm gear (8) is keyed to one end of the support member (γ) on the outside of the backup roll chock (4).

(9) is a worm reducer disposed outside the backup roll chock so as to mesh with the worm gear (8), and the worm reducer (9) is, for example, a step motor (not shown). ) and the speed reducer state,
By rotating the support members (7) by a required angle in the direction of each work roll (1), the contact force of the grinding wheel (B) to the work roll (1), which will be described later, can be adjusted appropriately, and the work sail ( 1) When replacing the work roll (1), the grinding wheel αη is retracted so that the work roll (1) can be replaced without any trouble. Note that (6) is a locking nut that ensures the relative position of each of the support members (7) and the backup roll chock (4).

Further, αno is a grinding wheel attached to the other end side of the support member (7), and a cylinder is attached to the end of the arm rod (B) that projects perpendicularly from the other end of the support member (7). A body α3) is provided, and the grinding wheel (b) is pivotally attached to the end of a rotating body (16) which is interlocked with a drive motor 0 which is rotatably held in the cylindrical body (18) via a bearing 0. Especially, grinding wheel α'6
is held so that it can be driven and rotated freely. Incidentally, the (foundation) is a bushing for fitting the rotating body 66) between the bearing Cl43 and the rotating body 06), and a spring (B) is interposed between each bushing (E). Moreover, the rotating body 0!6 is firmly held within the cylindrical body to prevent vibration during rotation of the grinding wheel C1η.

Furthermore, the support member (7) has a cylinder mechanism or screw mechanism inside, and the grinding wheel αη is connected to the work roll (
It may be configured to be movable forward and backward in the axial direction of 1).

The roll grinding device (5) of the rolling mill of the present invention is constructed as shown in the above embodiment. Next, the roll grinding method of the present invention is applied to the roll grinding device (5) ) will be explained below.

That is, the method of the present invention uses a backup roll chock (
4) The grinding wheels (B) attached to the grinding wheel (B) are brought into contact with the adjacent work rolls (1), and while the grinding wheels αη are rotated, each work roll (1) is rotated by the required amount in the axial direction. This is a method of grinding both outer peripheries of each work roll (1) by relative movement, and a specific example for carrying out this method will be shown below.

<Specific Example> First, the drive motor (c) is activated to rotate the grinding wheel (b), and at the same time, the wrinkle roll is rotated by the rotary movement device.

1 Next, operate the worm reducer (9) to reduce the support member (γ
) is shifted by rotating the adjacent work roll (1) by the required angle, the work roll (1) is operated as required, and each workpiece rotates the work roll (1) by the required amount in its axial direction. By moving the work rolls (1) relative to each other, the outer circumference M of each work roll (1) can be ground.

<Effects of the Invention> As described above, the rolling mill roll grinding method and device according to the present invention relatively move the work rolls in the axial direction, while
Since it is rationally and compactly constructed so that each work roll can be ground simply by bringing a rotatably driven grinding wheel into contact with each work roll, the guide member is complicatedly arranged at the work roll entrance/exit opening. It can be installed in the gaps between pipes and fluid piping, etc., making it possible to grind work rolls during idle time, reducing the frequency of work roll replacement, and cleaning the work roll surface in a short time when changing the side of a rolled steel plate. It has the great effect of being able to grind to the required state and realizing schedule-less rolling.

Brief explanation of the raw surface: , Fig. 1 is a schematic explanatory diagram showing an embodiment of the 10-hole grinding device of the present invention = Fig. 2 shows an embodiment of the °-“grinding device of the present invention Central longitudinal sectional view.

1, ' (1) Hower roll 4 (3) is a backup roll, (4) is a backup roll, (5) is a roll grinding device, (7) is a support member, (8) is a worm gear, (9 ) is a worm reducer, (b) is a drive motor, αη
is a grinding wheel.

Claims (2)

[Claims] (1) Roll grinding of a rolling mill characterized by rotating a work roll within a rolling mill stand and moving it back in the axial direction Ka' while simultaneously grinding the outer periphery of the work roll with a grinding device. Method.゛ − (2) a shaft-shaped support nm&, which is attached to each backup rule chock, which supports and holds two pairs of upper and lower backup rolls in the stand of the rolling mill, through bearings in parallel with the backup roller; a worm reducer which rotates each support member by a required angle by meshing with a worm gear pivotally attached to the m- of each support member on the outside of the back-up pro-chot; and a worm reducer at the other end of the first support member Each of the grinding wheels is rotated from a freely rotatable grinding wheel held in a shaft, and each worm reducer is activated to bring the grinding wheel into contact with each rake roll, and each work rule is relatively moved in the axial direction to arrest the grinding wheel. A roll grinding device for a rolling mill, characterized in that it is configured to grind the outer periphery of each work roll.