JPS58163509A - Grinding equipment of rolling roll - Google Patents

Abstract

PURPOSE:To grind a rolling roll in a state of rolling accurately and in a short time by means of a simple equipment, by bringing a grinding belt into press contact with outer circumferential surface of the rolling roll through a platen capable of adjusting its pressing force. CONSTITUTION:A platen 2 is provided parallelly to the axial line of a working roll 1. A frame 5 is provided to housing posts 3 parallelly to the platen 2, and the platen 2 is connected to the frame 5 through plural pressing devices 6 such as cylinders provided between them. a grinding belt 7 is passed between the rolling surface of work roll 1 and the platen 2, and both ends of the belt 7 are respectively wound around reels 10 and 11 through guide rolls 8 and 9. A rotary encoder is incorporated into one of the guide rolls 8 and 9 to detect the feeding speed of grinding belt 7, and position sensors 12 are respectively incorporated into pressing devices 6 to detect the pressing forces respectively. A grinding quantity is controlled by adjusting the detected feeding speed and pressing forces.

Description

[Detailed description of the invention] This article relates to a device that allows users to

In recent years, we have been able to achieve significant energy savings by converting slab production into continuous casting, but as a next step, we are expanding the use of so-called direct rolling, in which continuous casting machines and hot strip mills are directly linked. ing. However, in a continuous casting machine, it is desirable to produce slabs of a single width all at once from the viewpoint of workability, whereas in a rolling mill, it is necessary to regulate the rolling order. That is, in hot rolling, heat-up and abrasion of the rolls proceed simultaneously, causing local abrasion particularly at the portions of the rolls corresponding to the edges of the strip, so if rolling continues as it is, an abnormal profile of the strip will occur. Therefore, as a general rule, the convergence order is regulated and the sheet widths are rolled in order from wide to narrow. Therefore, the interests of the continuous casting machine and the rolling mill conflict with each other, and for this reason, there is a desire for early realization of a technology that can eliminate regulations on tin in rolling mills.

For this reason, some people are considering eliminating the rolling order regulation of the rolling mill by making it possible to grind the rolling rolls with a grindstone while rolling, thereby eliminating local wear on the rolling list. There is. However, in the method of polishing using the above-mentioned whetstone, clogging of the whetstone, chatter vibration,
It is very difficult to realize this because cracks occur in the grinding wheel, and even if it were possible, grinding the roll would take a long time because the grinding wheel would need to be dressed (unclogged) and shaped frequently. In addition, since it is not possible to simultaneously grind the entire width of the roll, it is necessary to drive the grinding wheel to rotate and press it against the roll while traversing the roll in the longitudinal direction. Moreover, it is necessary to provide a support structure constructed with precision, which makes the device complicated and large-scale.
There are other problems.

The present invention has been made in view of these points, and by pressing a grinding belt fed by a reel against the outer peripheral surface of a rolling roll via a platen, rolling can be carried out without causing the problems of the conventional method. In addition, the pressing force of a plurality of pressing devices that press the platen against the rolling roll is adjusted separately to cause deflection of the platen, thereby changing the amount of grinding in the longitudinal position of the rolling roll. Accordingly, the present invention relates to a mill roll grinding device that also makes it possible to control the roll profile of the mill roll.

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

1 and 2 show an example of the present invention, in which the work roll (1) is parallel to the axis of the work roll (1) at a position close to the downstream side of the rolling line, and the work roll (1) A platen (with a length that includes the rolling surface width of
2), and left and right nousing posts (3) (3
) is provided with a frame (5) parallel to the platen (2), which is supported in a vertical position adjustable by a guide groove (4), etc., and a frame (5) is provided between the platen (2) and the frame (5). , are connected via a plurality of pressing devices (6) such as cylinders that can independently adjust the amount of expansion and contraction at positions having a required interval in the axial direction of the work roll (1).

Furthermore, the rolling surface of the work roll (1) and the platen (2)
Pass the grinding belt (7) between the grinding belt (7) and
are wound around reels Ql and (Ll) through guide rolls (8) and (9), respectively, and the grinding belt ( 7).

In addition, a rotary encoder is installed in one of the guide rolls (8) and (9) to detect the feeding speed of the grinding belt (7), and a position sensor α2 is installed inside each pressing device (6) to detect the feeding speed of the grinding belt (7). The amount of grinding is controlled by detecting the pressing force of the platen (2) at and adjusting the feeding speed of the grinding belt (7) and the pressing force of the platen (2). The width of the grinding belt (7) is the same as that of the work roll (1
), and the length should be at least the length of the regular inspection period for the work roll (1). In the figure, 031 is a rolled material, ■
indicates the backing roll, and (to) indicates the platen guide.

The rolling of the rolled material Q31 may cause local wear on the work roll (1), which may result in an abnormal profile, or the work roll (1) may be replaced in order to subsequently roll another wide material. If grinding is required, reel allIQ
While feeding the grinding belt (7) at a very low speed (for example, less than 1.OO!ili minutes) by unwinding and winding the grinding belt (1), the grinding belt ( Grinding is performed by pressing 7) onto the outer peripheral surface of the work roll (1) with the required force. At this time, by adjusting the pressing force of each pressing device (6), the amount of grinding in the longitudinal position of the work roll (1) can be changed to perform highly accurate profile control of the roll, and the grinding belt (The overall amount of grinding can also be controlled by adjusting the force feeding speed and the pressing force of the pressing device (6).

In addition, in the above operation, the frame (
5), the vertical position of the pressing device (6) and the platen (2) can be adjusted with respect to the housing post (3). Furthermore, since the grinding belt (7) itself has the required elasticity, it has the advantage that vibrations of the work roll (1) and the like do not have a negative effect.

FIG. 3 shows another embodiment of the present invention, in which the platen (2) is pressed through a plurality of pressing devices (6) as in the previous embodiment.
frame (5) to which reel Q (1 (1
The engine is attached to a bracket αη connected to a link ae which rotates around a pin aperture, and a cylinder device side is provided which can rotate the sink Qe, and the operation of the cylinder device Ql is carried out by the operation of the cylinder device Ql. The grinding belt (7) and platen (2) are brought close to and separated from the roll (1), and the pressing device (6) is used to make fine adjustments for profile control. In the figure, 09 indicates a stopper device.

Note that the present invention is not limited to the above embodiments, and the grinding belt may be fed in only one direction from one reel to the other reel, or may be moved back and forth. Also, the pressing device may be set to pre-deflect the platen along the roll profile imparted to the work roll, such as by passing water inside the platen to prevent heating of the platen and the grinding belt. The platen may be cooled, a roll may be used for the platen, and although the illustration shows only the grinding of the upper work roll, it is of course possible to grind the lower work roll in the same way. There is something
It goes without saying that the present invention can also be applied to grinding various rolling rolls such as backing rolls other than work rolls, and that various other changes can be made without departing from the gist of the invention.

According to the mill roll grinding apparatus of the present invention described above, the following various excellent effects can be achieved.

(1) Grinding can be performed in the rolled state without removing the rolling rolls, and compared to the conventional method in which grinding is performed by rearranging the rolls, the labor and time required can be significantly reduced.

(11) The regulation of the tin layer of the rolling mill □ can be abolished, and the rolling schedule can be set and set freely.

(fil) Since the entire width of the roll can be simultaneously ground and troublesome operations such as dressing and shaping using a grindstone are not required, grinding can be carried out in a short time.

(iv) Profile grinding of the mill roll becomes possible by creating complex deflections in the platen using a plurality of pressing devices.

(V) The entire device is compact, so it can be applied to finishing rolling mills and the like that require little space.

[Brief explanation of the drawing]

FIG. 1 is an explanatory side view showing one embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1. FIG. 3 is a side view showing another embodiment of the invention. (1) is a work roll, (2) is a platen, (6) is a pressing device, (force is a grinding belt, aIaυ is a reel, (14)
indicates a backup roll. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1) A platen that can be pressed and separated from the outer peripheral surface of the roll is provided via a plurality of pressing devices arranged at required intervals in the axial direction of the roll, and a pressure contact surface between the platen and the roll. A mill roll grinding device characterized by having a reel between which a grinding belt is fed.