JPS63115607A - Rolling equipment - Google Patents

Abstract

PURPOSE:To mechanize a grindstone change, to shorten the time in changing it and to improve the productivity by moving an online roll grinding device in the roll axial direction and forming the structure capable of coming in and out of a housing as well. CONSTITUTION:A grindstone 20 is separated from a work roll 10 by a cylinder 21. A grinding device main body 22 is then pulled out to the outside of a housing by the guide of a guide rail 23 with a cylinder 24 after retreating the support guide 14 of a work roll chock 12. With the device of this composition the grindstone change can be automated and the productivity is improved as well.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a rolling device having characteristics of a roll grinding device for hot rolling.

<Conventional Technology> In recent years, in the rolling industry, there has been a trend to install online grinding equipment that can grind work rolls online in order to reduce the number of work roll replacements and increase production.

This on-line grinding device uses a grinding wheel to remove steps and roll surface roughness caused by a board road on a work roll during rolling or during rolling waiting time (between bars) by using a grinding wheel.

This reduces the number of times rolls had to be replaced due to unevenness or rough skin.

This grinding device is installed between the housings 3 of a rolling mill, as shown in typical examples in FIGS. 9 and 10. 1st
Figure 0 is a front view of the grinding device, and as shown in the figure, the main body 6, which has a plurality of grinding wheels 4 installed in the roll axis direction, is reciprocating while the grinding wheels 4 are pressed against the work roll 1 in the roll axis direction. Grinding is done while This grinding device is arranged between the housings of the rolling mill for each housing as shown in FIG.

Here, 2 is a backup roll, 3 is a housing, and 5 is a
Pressing the whetstone is done with a cylinder.

<Problems to be Solved by the Invention> However, when this grinding device is installed between the housings, the conventional rolling mills are mainly quadruple rolling mills as shown in Fig. It is a tandem array. Here, the length L' that can be used for the grinding device between adjacent housings is about 1.5 to 2 meters. Therefore, the design structure is almost at its limit for placing a grinding device between them. Therefore, when replacing the worn grindstone 4, it is necessary to remove the work roll 1 from the housing 3, enter the housing 3, and replace the grindstone manually. However, if this is done manually, there are 12 grindstones per housing, and since there are 6 housings, a total of 72 pieces will have to be replaced, resulting in a huge loss in terms of time and labor.

This is because the grinding device itself is embedded between the housings and cannot be pulled out of the housing. Therefore, to solve this problem, if the entire grinding device can be pulled out of the housing, it can be replaced using a cassette method.

The present invention has been made in view of the current situation, and it is an object of the present invention to provide a rolling machine that can be replaced mechanically rather than manually, and in which the grindstone can be replaced in a short time.

<Means for Solving the Problems> The configuration of the present invention for achieving the above-mentioned object is a rolling apparatus that is an online roll grinding apparatus itself that grinds a work roll by reciprocating in the axial direction of the roll during rolling. The feature is that the online roll grinding device can be moved in and out of the housing in the roll axis direction.

Effects> With the above configuration, the grinding device can be put in and out of the housing without moving the rolls of the rolling mill, and the grindstone can be easily replaced.

<Example> Examples of the present invention will be described below with reference to FIG. 1, which is a side view showing half of the first embodiment in cross section, and FIG. 2, which is a side view of the main part of FIG. FIG. 3 is a sectional view taken along the line 8-A of FIG. 4, FIG. 4 is a side view showing a part of the second embodiment in cross section, and FIGS. 6 and B in FIG. 6, which are side views of the embodiment.
The description will be made based on FIG. 7, which is a cross-sectional view taken along line -B, and FIG. 8, which is a cross-sectional view of the fifth embodiment.

In FIG. 1, the feature of this embodiment is that a work roll 10
The backup roll 11 is larger than that. This is to prevent the rolls 10 and 11 from interfering with the loading and unloading of the grinding device. The work roll 10 includes a chock 12 and a support guide 1 that supports it.
Supported by 4. This support guide 14 can be slid by a hydraulic cylinder 15 in the rolling direction. The backup roll 11 is supported by a chock 13 and a housing 19, and a load cell 17 is arranged between the chock 13 and the housing 19.

The backup roll chock 13 and the work roll chock 12 are connected by a kite post 16 so that the chocks 12 and 13 are integrated. This guide guide post 16 can be slid and separated. A grinding device for the work roll 10 is provided within the housing 19 of the rolling mill having such a configuration.

Here, 20 is a grindstone, 21 is a cylinder for pressing the grindstone, and 2
2 is a main body, 23 is a guide rail fixed to the housing 19, and 24 is a cylinder for sliding the main body. and,
The figure shows the situation during grinding.

Figure 2 shows when to replace the grindstone. As shown in the figure, first, the grindstone 20 is separated from the work roll 10 by the cylinder 21. After that, the support guide 14 of the work roll chock 12 is moved back. Thereafter, the grinding device main body 22 is pulled out of the housing 19 by the cylinder 24 and guided by the guide rail 23 . An example of a situation in which the housing 19 is pulled out is shown in FIG.

The grinding device pulled out of the housing 19 in this way is replaced with a grinding device that has a new grindstone 20 set in advance, and the grinding device with the new grindstone is inserted into the housing 19 in the reverse order of the operation when pulled out. set.

This completes the grindstone replacement. With this method, the grindstone can be replaced in advance on a separate line, so the work can be completed by simply loading and unloading the main body of the grinding device, which can be completed in 115 to 1/10 of the time required by conventional methods, improving productivity. Additionally, since it can be automated using machines rather than humans, it requires less labor and is safer.

FIGS. 4 and 5 show a rolling mill as an application example of the present invention in which the grinding device can be replaced without moving the rolls, as described above.

FIG. 4 shows a forming rolling mill having a work roll 40 and three rolls 41, 42 and 43 as backup rolls. This is an example of a roll group arrangement in which the height of the housing 44 is increased, but the grinding device can be taken in and out with a housing width comparable to that of a conventional rolling mill.

FIG. 5 shows an example in which the work roll 30 and the backup roll 31 are not perpendicular but are arranged eccentrically to ensure a wide installation location for the grinding device. Here, 32 is a backup role. This occurs in an example where the height of the housing 33 is low but the width is wide.

FIG. 6 shows a side view of the fourth embodiment. As shown in the figure, the upper and lower work rolls 51 have left and right backup rolls 60, 6.
1 are arranged in an X-shape to support a work roll 51. There are no backup rolls 60 and 61 above and below the upper and lower work rolls 51. In its place, a grinding device is installed. Here, 54 indicates a grinding wheel, 55 a hydraulic or pneumatic cylinder, 65 a main body, 6
7 is a guide rail fixed to the housing 63, 66 is a rail fixed to the main body 65, and 68 is a hydraulic cylinder for sliding the grindstone 54 and the main body 65 in the axial direction. Such a grinding device is provided above and below the upper and lower work rolls 51.

Normally, in this state, the work roll 51 is ground while pressing the grindstone 54 against the work roll 51 using a hydraulic or pneumatic cylinder 55 as in the conventional manner.

Next, replacing the grindstone when the grindstone 54 is worn out will be explained with reference to the axial cross-sectional views shown in FIGS. 7 and 8.

FIG. 7 shows an embodiment in which a guide rail 67 fixed to the housing 63 projects only on one side of the how and the zinc. The figure shows a situation in which the work roll 51 is being ground. When replacing the grinding wheel, the grinding wheel 54 is separated from the work roll 51 by the hydraulic or pneumatic cylinder 55, and then the grinding wheel 54 is moved away from the work roll 51 by the slide cylinder 68 together with the main body 65. 66 is drawn out of the housing 63 along the guide rail 67.

After taking the grinding device out of the housing, set the grinding device (consisting of 54°, 55.65, etc.) on which a new grindstone has been set in advance on the guide rail 67, and then press the hydraulic cylinder 68.
The preparation is completed by pushing it to the predetermined grinding position.

FIG. 8 shows an embodiment in which guide rails 67 for loading and unloading the grinding device extend out from both sides of the housing 63. In this case, there is another grinding device (54', 55') with a grindstone 54' set in advance on the other side.

65', etc.), and when replacing the main body, the entire body is pushed into the housing using a hydraulic cylinder 68'. The grinding equipment I had been using (54, 55, 65)
etc.) is pulled in the opposite direction by a guide rail 67 and a hydraulic cylinder 68 provided on the other side. With this method, the replacement work can be completed in a shorter time than in the case shown in FIG. 7.

<Effects of the Invention> As described above, according to the present invention, the grinding wheel can be changed mechanically in a short time, which improves productivity and eliminates the need for human labor, thereby improving safety.

[Brief explanation of the drawing]

1 to 8 show embodiments according to the present invention. FIG. 1 is a side view showing a half of the first embodiment in cross section, and FIG. 2 is a side view of the main part of FIG. 1. Figure 3 is a cross-sectional view taken along line A-A in Figure 2, Figure 4 is a cross-sectional view of a part of the second embodiment (!tli side view, Figure 5 is a cross-sectional view of the third embodiment). side view, 6th
The figure is a side view of the fourth embodiment, FIG. 7 is a sectional view taken along line B-B in FIG. 6, FIG. 8 is a sectional view of the fifth embodiment, and FIG. 9 is a side view of the conventional example. FIG. 10 is a front view of a conventional grinding device. Also, in the symbols in the diagram, 1.10, 30, 40.51 are work rolls, 3.19
, 33, 44.63 are the housing, 4.20.54 is the grindstone, 22.65 is the main body, 23.67 is the guide rail, and 24, 68.68' is the cylinder. Patent applicant Mitsubishi Heavy Industries, Ltd. (1 other person) Sub-agent Patent attorney Mitsuyuki Dobe (1 other person) Figure 1 Figure 2 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A rolling machine having an online roll grinding device that grinds a work roll by reciprocating in the roll axis direction during rolling, characterized in that the online roll grinding device can be moved in and out of a housing in the roll axis direction. Device.