JPS609505A - Roll grinding device having parallelism-correcting function housed in rolling mill - Google Patents

Abstract

PURPOSE:To maintain always precisely the level of a locus of grinding surface in the X-Y direction by vertically moving a grinder main-body with the aid of a leveling plate provided with a slant guide, to correct the positional change of a whetstone, in an on-line grinding device by using a rotary whetstone. CONSTITUTION:A dolly 4 for taking in and out a main body is fitted to a slant guide of leveling plates 8 which are fitted to a plate on a stand and vertically moved by a motor-driven cylinder 10, and the whole body of a grinding device is pressed against a roll 1 and separated therefrom by a hydraulic cylinder 4'. A whetstone 3 is rotated, and is moved perpendicularly to the roll axis by a motor-driven cylinder 7' by guiding it with the aid of a frame 7 fixed to a traversing frame 9, which is fitted to a frame 9' formed in one body with the dolly 4 and is slid on the surface parallel to the roll axis. Further, when the grinding point of whetstone 3 changes, left and right columns 6, supported 11 by the frame 9' rock vertically through follow-up rolls 2 which are in contact with the roll 1, to extend and contract a balancing hydraulic-cylinder 16 installed between the columns 6 and a fixed frame 5. This amount of stroke is detected by a detector 18 to drive the cylinder 10 and move vertically the plates 8 placed at the operating and driving sides.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll grinding device in a rolling mill having a parallelism correction function, and more specifically, it detects the parallelism between the roll axis and the grinding wheel axis and transmits the error to the leveling mechanism. Adjust the level of the grinding device to work side WS or drive side DS.
This invention relates to an in-mill roll grinding device that is corrected by vertical movement of the roller.

As is well known, rolling rolls for copper strips, bar steel, etc. are subject to abrasion and deformation on the surface that contacts the copper strip as the throughput increases, and foreign matter may partially adhere to the roll surface or be generated on the roll surface. Microcracks, etc. will damage the surface quality of the strips, etc. For this reason, it is common practice to periodically interrupt the rolling operation once the rolling amount has started, replace the rolls, and grind the rolls whose surface properties have deteriorated.

In order to prevent the deterioration of the copper strip surface properties due to roll wear and deformation, the total amount of rolling until the roll change is regulated, or even within the same rolling schedule, rolling from wide to narrow is carried out. The reality is that this issue is dealt with through detailed rolling regulations, such as regulating the amount of continuous strip passing through the rolling width. For this reason, it is necessary to adjust the rolling schedule in the pre-rolling stage, and this is hindering the improvement of the direct conversion rate from steel manufacturing to hot rolling. Furthermore, this operating method requires a cycle of removing deteriorated rolls from the rolling mill stand, grinding them at a roll maintenance shop, and then reinstalling them on the rolling mill stand, which requires a lot of labor and time, and requires interruption of the rolling operation. This has led to a decline in production.

However, in order to solve this problem, many techniques have been proposed in which the roll is ground while being rolled using a roll grinding device built into the stand during rolling. Namely, these methods include electrolytic polishing, pressing with a cutting tool (bite), belt grinder, pressing with a rectangular grindstone, high-pressure water jetting, and rotating grindstone. However, the inventors of the present invention have been engaged in many years of research, and are already proposing an online grinding device using a rotating grindstone in Japanese Patent Application No. 57-34434.

This is shown in Figs. 1 and 2, and shows that "this is a swing type. In the figure, the swing shaft 38 is fitted with a leveling plate 38/, and there is a structure inside that can follow the hanging angle of the main body. Parts such as a spherical bush are installed inside and are swung by a swing cylinder 34.The leveling operation is performed by an electric motor drive via a scree jack 40 following the operation of the rolling mill's rolling device. In the case of the device, the traverse frame 39 in which the grinding wheels 33 and 33' are installed slides repeatedly to the working side and the drive side following the fixed frame 39'.When the traverse frame 39 moves to both ends, the traverse frame 39 The fixed frame 39' is set due to the weight of the frame 39 being applied.
If the tll part surface trajectory descends from jf'A', the parallelism will be out of order in both the X and Y directions.
: It was difficult to change the shape of F i'i11.

The present invention has been devised to advantageously solve the above problem, and its suction property is to fit into a plate fixed to a stand, and to use a dynamic cylinder to generate vertical iα inside the stand. a leveling plate having an inclined guide surface that moves up and down; a truck portion that is fitted onto the inclined guide surface of the leveling plate and that moves the grinding body in and out by the operation of a hydraulic cylinder for loading and unloading the body; and the truck portion A main frame that is provided in one body and has a sliding surface parallel to the roll axis, a traverse frame that is fitted to the R body frame and traverses along the sliding surface of the main body frame, and a bottom part of the traverse frame. A fixed whetstone guide frame and a roll lily 11 guided by the whetstone guide frame.
The grinding wheel head moves in and out at right angles to the core, and the column has a copying roll that rotates in contact with the roll on the tip of a fixed frame installed on both sides of the main body frame facing the roll, and the column is moved up and down via a fulcrum shaft. A hydraulic cylinder is provided between one end of each of the columns and one end of the fixed frame, and a position detector is provided between the leveling plate having the inclined guide surface and the fixed plate. This invention relates to an apparatus for several rolls in a rolling mill having a parallelism correction function, characterized in that a stroke detector is provided in a hydraulic cylinder provided between the rolls.

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

FIG. 3 shows a perspective view of the entire assembly, and FIG. 4 a side view. The 41 No. 1 cutting device of the present invention fits into a plate 8/ fixed to a rolling stand S, and has a resolution in the μm unit.
? T], 1lrj1 The main body loading/unloading carriage part 4 is fitted into the inclined guide of the leveling plate 8 with a tilted guide which is suspended from the cylinder 10 and slides up and down, and the grinding device is closed by the operation of the main body loading/unloading hydraulic cylinder 4'. r the whole
Push or rqtc to tl 4+/f cutting roll 1. 3 is a grinding wheel, and illustration thereof is omitted. By the shadow movement! l) It is rotated at a constant rotational speed of 731i, is guided by the grindstone guide frame 7, and can be moved in a direction perpendicular to the axis of the grinder roll by an electric cylinder 7' for cutting the grindstone. The grindstone guide frame 7 is fixed on the bottom of a traverse frame 9, and the traverse frame 9 is fitted into a main body frame 9' that is integrally provided on the truck portion 4 and has a sliding surface parallel to the roll axis. The traverse frame 9 is driven by a drive mechanism (not shown) and the main body frame 9'
The roller reciprocates parallel to the roll axis on the sliding surface of the roller.

Further, reference numerals 2 and 2' denote copying rolls that touch both ends of the roll 1, and are provided at the top and bottom of the tip of the column 6 and 6'. The column 6.6' can quickly follow the vertical movement of the roll l via a fulcrum shaft 11.11' at the tip of a fixed frame 5 integrally provided on both sides 1i1i of the main body frame 9' facing the roll 1. connected. As a result, even if the axial center position of the roll 1 changes due to changes in the diameter of the roll 1, the thickness of the rolled material, etc., the copying rolls 2, 2' can reliably contact the ends of the roll 1. 16.16' and 17.17' are balance hydraulic cylinders arranged between the fixed frame 5 and column 6.6', and 18.18' and 19.19' are stroke cylinders attached to the hydraulic cylinders. It is a detector.

However, when the grinding point of the grinding wheel 3 changes due to reduction correction etc., the column 6.6' is vertically oscillated, and the balance hydraulic cylinder lower part 16.16' side and upper part 17.17' side 11 It expands and contracts relative to. The amount of expansion and contraction of each cylinder at this time is detected by stroke detectors 18, 18' and 19, 19', and the electric cylinder 10 of the leveling machine and is driven to move the leveling plates 8 with inclined guides of the WS and DS up and down, aligning the grinding wheel axis and the roll axis to maintain good grinding accuracy.

By driving the electric cylinder 10, the leveling plate 8 with a tilt guide is moved up and down to correct the leveling.
The correction result at this time is confirmed by the position detector 20 disposed between the fixed plate 8' and the leveling plate 8, and it becomes possible to accurately correct the parallelism.

However, the stroke detector and the small device in the position were very hot.
Accurate detection accuracy is required even under the adverse environment of a rolling mill where dust, oil, water, etc. coexist. From this point of view, although Magnescale is used in this embodiment, a pulse scale can also be used.

On the other hand, the distance between the sliding surface of the main body frame 9' (grinding wheel sliding reference surface) and the axis of the roll 1 is not always constant; for example, when disassembling and reassembling the main body of the grinding device, It changes depending on the difference etc. If there is a change in the parallelism of this grinding device in the X-horizontal direction (wS, S roll axis and 111 (the distance between stone axes should always be constant), it is necessary to correct it immediately before grinding. An example of the correction mechanism will be explained with reference to FIGS. 5 and 6.

FIG. 5 shows details of the grinding device tip fixing frame 5, column 6, and the swinging fulcrum shaft 11 that connects them, 1411
12 in the figure is a cock placed between the column 6 and the fulcrum shaft 11. Therefore, the fulcrum shaft 11 is a representative point of the fixed frame 5 on the grinding device main body side, and if there is a difference in the distance Therefore, a slight IY 11i'- is possible. Adjustment operations are easy.

Loosen the bolt (not shown) and turn the cock push/pull nuts (not shown) to adjust the length of the X' distance.
-X l = Complete by fixing and setting the X2 value. As a result, the axis of the roll to be ground 1 and the sliding surface (grinding wheel sliding reference surface) of the grinding device main body frame 91 become parallel. At this time, the pressing angle of the grinding device main body and the cutting angle of the grindstone are θ, and the touch angle of the column 6 is also θ, completing the correction of parallelism in the horizontal direction. then column 6
When the touch angle changes, it means that the distance between the roll axis and the grinding wheel axis has changed between WS and DS, and the grinding wheel has parts that can be ground and parts that can grind. An example of the touch angle of column 6 at this time will be explained with reference to FIG.

In other words, the touch angle of column 6 with respect to the roll axis is θ
', the landing 15 of the grinding device is deformed downward to the left, and the point of contact of the grinding wheel 3 is the Y distance V° [[] sometimes goes down and sometimes goes up, and if you grind as it is, it will be stepped grinding. In such a case, the balance hydraulic cylinders 16 and 17 move relative to each other and expand and contract, so the stroke detectors 18 and 19 detect this expansion and contraction, and the leveling mechanism is powered until the stroke values of both coincide. Cylinder 10! A@
By controlling WS and DS either upward or downward, the pressing angles of the grinding device and the column match,
The grinding wheel is held at the proper grinding point. As described above, the result of correction by the leveling mechanism is confirmed by the feedper position detector 20.

As explained in detail above, the device of the present invention uses a leveling plate with an inclined guide to raise and lower the grinding body, so there is no fear that the grinding wheel will lose its levelness due to its own weight when traversing. When the roll axis and grindstone axis change due to reduction correction, roll rearrangement, etc., the amount of change is quickly detected by a high-precision stroke detector and a position detector, and the electric cylinder 10 is configured to correct the change. Therefore, the horizontality in the x and y directions is always maintained accurately, and the precision of grinding is dramatically improved. As a result, it is possible to improve the direct conversion rate from steel making to hot rolling, and it also has the effect of improving productivity.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a side view and a partial front view of the previously proposed grinding device. 3 is a perspective explanatory view showing the entire assembly of the apparatus according to the present invention, FIG. 4 is a side explanatory view, and FIG. 5 is an explanatory side view.
6 are explanatory diagrams showing a mechanism for adjusting the parallelism of the grinding device in the horizontal direction. FIG. 5 shows a normal state, and FIG. 6 shows a state where the touch angle of the column has changed. 1.1': Roll, 2.2': Copy roll, 3: Grindstone,
4: Body loading/unloading trolley part, 4' Hydraulic cylinder for loading/unloading the two bodies, 5: Fixed frame, 6.6': Column, 7:
Grinding wheel side frame, 7': Grinding wheel cut-in type, drawing cylinder, 8: Leveling plate with inclined guide, 8' two-way play), 9:) Rubber frame, 9' Two main body frames, 10: WJjl + cylinder, 11: Fulcrum shaft, 12: Cotter, 13: Roll trunk, 14: Landing section, 15: Deformed landing, 16.16': Hydraulic cylinder for lower balance, 17, 17': Hydraulic cylinder for upper balance, 18, 18', 19.19' Two-stroke detector, 20: Feedback position detector, 21: Reinforcement roll. Applicant Shin Nippon Seika Co., Ltd. Representative Patent Attorney Minoru Aoyagi

Claims (1)

[Claims] A leveling plate has an inclined guide surface that fits into a plate fixed to the stand and is moved up and down vertically within the stand by an electric cylinder; A trolley part for loading and unloading the grinding body, and a
A main body frame provided on the body and having a sliding surface parallel to the roll axis, a traverse frame fitted to the main body frame and traversing along the sliding surface of the main body frame, and a traverse frame fixed to the bottom of the traverse frame. A grinding wheel guide frame, a grinding wheel that is guided by the grinding wheel guide frame and moves in and out in a direction perpendicular to the roll axis, and a 1. A leveling system in which a column in which contact-rotating copying rolls are arranged is vertically movably connected via a fulcrum shaft, and a hydraulic cylinder is arranged between each end of the column and one end of a fixed frame, and further has the inclined guide surface. A roll grinding device in a rolling mill having a parallelism correction function, characterized in that a position detector is provided between a plate and a fixed plate, and a stroke detector is provided in a hydraulic cylinder provided between a column and a fixed frame.