JP4621088B2 - Cup-shaped grinding wheel for online roll grinding - Google Patents

Description

  The present invention relates to a constant pressure grinding cup-shaped grindstone that is deformed in accordance with the shape of a work material and has a vibration absorption property of a workpiece to be vibrated, and in particular, an online roll used when grinding a rolling roll to be rolled online. The present invention relates to a cup-shaped grinding wheel for grinding.

  Rolling rolls for rolling steel plates and the like are worn more intensely in the center than on the shaft end side depending on the width of the steel plates to be rolled. in use. Such replacement of the rolling rolls must be performed with the rolling operation temporarily stopped, so that the efficiency of the rolling operation is greatly reduced. Therefore, an on-line roll grinding apparatus that grinds a rolling roll while rolling a steel plate or the like is used. As a grindstone used in this field, for example, in Japanese Patent Application Laid-Open No. 9-1463, an annular grindstone layer 3 is mounted and formed on the peripheral surface portion of a disc-shaped base metal, and the peripheral portion of the disc-shaped base metal is used as a fulcrum. A grinding body for on-line roll grinding is disclosed which is formed in a flat ring shape projecting toward the inner peripheral side with a lateral groove 6 between the disc-shaped base metal body (see FIG. 11). ).

Further, JP 2000-52255 A discloses a grinding body for on-line roll grinding in which a lateral groove-shaped gap is filled with a damping material in order to reduce chatter marks, which was not solved by the prior art. .
JP-A-9-1463 JP 2000-52255 A

  The base metal of the grinding body for online roll grinding described in JP-A-9-1463 has a flat plate structure in which one disk member 7 is folded back to the inner peripheral side with the outer peripheral side as a fulcrum as shown in FIG. ing. When a load is applied to the inner peripheral side of the grindstone layer 3 (when it hits on the inner peripheral side), the upper flat plate portion 7a is bent inward with the outer peripheral side as a fulcrum, and a load is applied to the outer peripheral side of the grindstone layer 3 It is understood that the lower flat plate portion 7b bends with the inner peripheral side as a fulcrum (see FIG. 2 of the same publication). In this configuration, when a load is applied to the outer peripheral side, the lower flat plate portion 7b is also required to exhibit an appropriate spring function in order to obtain a vibration suppressing effect.

  In the base of the conventional grinding body, in order to obtain an appropriate spring constant with the flat plate structure, it is necessary to reduce the thickness of the plate portions 7a and 7b at or near a portion serving as a fulcrum of bending. Therefore, stress concentration tends to occur in those portions, and there is a possibility that deformation or fracture exceeding the allowable limit may occur. On the other hand, assuming that the grinding stone pressing pressure on the workpiece is increased for the purpose of high-efficiency grinding, a plate thickness is required to ensure the strength of the base metal. In that case, since there is a limit to providing a flexible spring function, it may be considered that sufficient vibration suppression effect may not be obtained. In particular, since the above-mentioned ground body is configured to bend using the thin portion of the base metal as a fulcrum, stress concentration cannot be avoided, and further study on strength will be required. Further, in the grinding body of Japanese Patent Laid-Open No. 2000-52255, the groove type gap 6 is filled with a damping material to prevent chatter marks, but the structure of the base metal is disclosed in Japanese Patent Laid-Open No. 9-1463. It will have the same problem because it is the same.

  Further, as described in JP 2000-52255 A, it is effective to fill the vibration damping material in order to absorb vibrations and prevent the occurrence of chatter marks, but the space in which the vibration damping material can be filled is a small groove. It is limited to the mold gap, and it is considered that there may be cases where a sufficient effect for vibration suppression by the damping material cannot be obtained.

  In view of the above problems, the present invention is easy to ensure strength without excessive stress concentration on the base metal during pressing of the grindstone, and has a high degree of design freedom that can provide a desired elastic function. An object of the present invention is to provide a cup-shaped grindstone for on-line roll grinding that has a configuration convenient for filling damping material.

  As a result of earnest research to solve the above-mentioned problems, the present inventors have found that in a cup-shaped grindstone for on-line roll grinding in which an annular grindstone layer is provided on one surface of a disk-shaped base metal along the circumferential direction, The present invention has been completed by finding that a configuration having two disk portions which are fixed on the peripheral side and form a hollow portion therein is advantageous.

That is, the present invention is an on-line roll grinding cup-shaped grindstone in which a grindstone layer is provided on one side circumference of a disk-shaped base metal,
The disk-shaped base metal has a first disk part having an annular grindstone layer mounting surface, and a second disk part for supporting the first disk part, and the first disk part is on the inner peripheral side thereof. And is fixed to the second disk portion, and the second disk portion projects to the outer peripheral side so as to form a hollow portion below the first disk portion, and its outer peripheral edge is set to the outer peripheral edge of the first disk portion. It is configured to support this by contacting from below,
The present invention relates to a cup-shaped grindstone for on-line roll grinding, characterized in that elastic means are provided on the inner circumferential portion and the outer circumferential portion of the disk-shaped base metal.

  In the cup-shaped grindstone of the present invention, in the first aspect, elastic means are provided in a portion closer to the inner periphery than the grindstone layer mounting surface of the first disc portion and a portion closer to the outer periphery of the second disc portion, respectively. Can be configured.

  In the cup-shaped grindstone of the present invention, in the second aspect, the first disc portion and / or the inner wall portion of the second disc portion and the portion near the outer periphery of the second disc portion are each provided with elastic means. Can be configured.

In the cup-shaped grindstone of the present invention, the elastic means can be provided by forming a plurality of slits in at least a part of the portion.
Moreover, in the cup-shaped grindstone of this invention, the said 1st disk part can be set as the structure provided so that attachment or detachment is possible from a base metal main body. Furthermore, in the cup-shaped grindstone of the present invention, it is preferable that the plurality of slits are filled with a sealing material. Moreover, it is preferable to have a damping material in the cavity between the first disk part and the second disk part.

  The cup-shaped grindstone for online roll grinding according to the present invention has a disc-shaped base metal having a first disc portion having an annular grindstone layer mounting surface and a second disc portion for supporting the first disc portion. The first disk part is fixed to the second disk part on the inner periphery side thereof, and the second disk part projects to the outer periphery side so as to form a cavity part below the first disk part. The outer peripheral edge is configured to abut against and support the outer peripheral edge of the first disk portion from below, and elastic means are provided on the inner peripheral portion and the outer peripheral portion of the disk-shaped base metal, respectively. Therefore, it is advantageous in securing the strength of the grindstone and has a high degree of design freedom for providing a desired elastic function. The elastic means can be arranged so as to satisfy various design factors in terms of dimensions such as, for example, the dimensions of the grindstone layer, the disk-shaped base metal, the shaft hole, and the grindstone shaft mounting hole.

  In particular, in the cup-shaped grindstone of the present invention, the two disk portions are fixed on the inner peripheral side, but the outer peripheral side is a free end support and each can be independently deformed. The two elastic means can function flexibly under stress, and the followability and vibration suppression function of the grindstone during grinding can be greatly improved. Any contact to the peripheral side can be eliminated satisfactorily, and the occurrence of chatter marks can be effectively prevented. In addition, since the base metal is configured to support the grindstone layer from both the inner peripheral side and the outer peripheral side, it does not depend on the bending at one fulcrum, and the stress applied during grinding is easy to disperse. It is also advantageous for ensuring durability. Therefore, according to the present invention, it is possible to provide a cup-shaped grindstone for on-line roll grinding that has flexibility and strength that can cope with a high grinding stone pressing pressure and enables a grinding operation that is more efficient than conventional ones.

  Moreover, since the grindstone having the above structure has a sufficiently large cavity for filling the vibration damping material between the first disk portion and the second disk portion, the vibration preventing function using the vibration damping material is provided. It is particularly convenient to increase

  Furthermore, according to the structure in which the first disk portion is detachably provided from the base metal body, it is easy to replace the used grindstone layer, and the base metal body can be used repeatedly, which is economically advantageous. is there. In addition, for example, stocking the first disk part on which the grinding wheel layer is formed, and replacing the first disk part immediately when necessary makes it possible to resume grinding work with a new grinding wheel layer, thus improving work efficiency. To do.

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described in detail with reference to the drawings.
First, the 1st aspect of the cup-shaped grindstone of this invention is demonstrated.
1 is a perspective view of a cup-shaped grindstone according to the first embodiment of the present invention, FIG. 2 is a perspective view of a disc-shaped base metal used in the grindstone of FIG. 1, and FIG. 3 is a perspective view of the disc-shaped base metal of FIG. It is sectional drawing (a) and exploded view (b). This cup-shaped grindstone has a disc-shaped base metal consisting of a first disc portion 1 that provides a grindstone layer adhesion surface and a second disc portion 2 that is provided so as to support the first disc portion 1 from below. The grindstone layer 3 is annularly arranged and bonded on the grindstone layer bonding surface of the first disk portion 1. A shaft hole and a grindstone shaft mounting hole are formed in the center of the second disk portion 2 in the direction of the rotation axis, and the cup-shaped grindstone is fixed to the drive shaft of the online roll grinding apparatus through this portion.

  The 1st disk part 1 has the cyclic | annular upper board part 1a which protrudes in the outer peripheral direction from the cylindrical inner wall 1b in the inner peripheral side, and the upper part of the inner wall 1b. A portion near the outer periphery on the annular upper plate portion 1a is an annular grindstone layer bonding surface, and a plurality of slits 1c as elastic means are provided in a portion closer to the inner periphery than the grindstone layer bonding surface. Each of the plurality of slits 1c is evenly drilled along the circumferential direction of the thin portion of the annular upper plate portion 1a.

  The second disk portion 2 has a hollow portion 5 from the inner wall 2b having the same diameter as the inner wall 1b of the first disk portion 1 and from the thick portion on the lower side of the inner wall 2b toward the outer periphery, that is, downward from the first disk portion 1. And a cylindrical outer wall 2e that curves from the bottom plate portion 2a and extends upward. The outer peripheral edge of the upper part of the outer wall 2e abuts along the outer peripheral edge of the first disk portion 1 and supports it from below. The outer wall 2e is provided with elastic means composed of a plurality of slits 2c. The plurality of slits 2c are equally drilled along the circumferential direction of the outer wall 2e.

  The inner wall 1b of the first disk part 1 and the inner wall 2b of the second disk part 2 have a plurality of bolt holes 1d and 2d communicating with each other, and the inner wall of the first disk part 1 is formed by bolts 4 inserted therein. 1 b is fixed to the inner wall 2 b of the second disk portion 2. Thus, the 1st disc part 1 is fixed on the 2nd disc part 2 by the inner peripheral side by the detachable fixing means.

Next, the 2nd aspect of the cup-shaped grindstone of this invention is demonstrated.
FIG. 4 is a perspective view of a cup-shaped grindstone according to the second embodiment of the present invention, and FIG. 5 is a perspective view of a disc-shaped base metal used in the grindstone of FIG.

  The first disc portion 21 of the cup-shaped grindstone has a cylindrical inner wall 21b on the inner peripheral side, and an annular upper plate portion 21a that protrudes from the upper portion of the inner wall 21b in the outer peripheral direction. The annular upper plate portion 21a serves as an annular grindstone layer bonding surface.

  The second disk portion 22 has an inner wall 22b having the same diameter as the inner wall 21b of the first disk portion 21 and a thick portion on the lower side of the inner wall 22b in the outer circumferential direction, that is, downward from the first disk portion 21. And a cylindrical outer wall 22e that curves from the bottom plate portion 22a and extends upward. The outer peripheral edge of the upper part of the outer wall 22e abuts along the outer peripheral edge of the first disk portion 21 to support it from below.

  The inner wall 21b of the first disk part and / or the inner wall 22b of the second disk part is provided with a plurality of slits 21c as elastic means. Each of the plurality of slits 21c is equally drilled along the circumferential direction of the inner wall 21b and / or the inner wall 22b.

  The outer wall 22e of the second disk portion is provided with elastic means including a plurality of slits 22c. The plurality of slits 22c are equally drilled along the circumferential direction of the outer wall 22e.

Other parts and configurations of the second aspect of the present invention are substantially the same as those of the first aspect described above.
In the cup-shaped grindstone of the present invention, the elastic means can be arranged so as to satisfy various design factors on the dimensions such as the grindstone layer, the disk-shaped base metal, the shaft hole, and the grindstone shaft mounting hole. . For example, when the dimensions of the shaft hole and the grindstone shaft mounting hole are small and the area of the annular upper plate portion of the first disk portion is sufficiently larger than the area of the grindstone layer, as described in the first aspect, A configuration in which elastic means is provided in a portion closer to the inner periphery than the grinding wheel layer mounting surface of the one disc portion and a portion closer to the outer periphery of the second disc portion can be provided. In addition, for example, when the dimensions of the shaft hole and the grindstone shaft mounting hole are large and the area of the annular upper plate portion of the first disk portion is substantially equal to the area of the grindstone layer, as described in the second aspect described above. In addition, the first disk portion and / or the inner wall portion of the second disk portion and the portion near the outer periphery of the second disk portion may be provided with elastic means, respectively.

  The elastic means used in the present invention is typically provided by providing a slit as described above. However, the invention is not limited to this, and the elastic means may be provided by reducing the plate thickness, or the elastic means may be provided by combining the adjustment of the plate thickness and the formation of the slit. For example, as in the first aspect described above, the thickness of the portion where the slit is formed in the annular flat plate portion 1a may be slightly reduced. In the case where the elastic means is provided by reducing the plate thickness, the preferable thickness may be 0.4 to 6.0 mm.

  As described above, the first disk portion 1 (21) and the second disk portion 2 (22) are fixed to each other via the inner peripheral side, that is, the inner walls 1b (21b) and 2b (22b). The outer peripheral side is a free end support. That is, the outer peripheral end of the first disc portion 1 (21) is supported from below by the outer wall 2e (22e) of the second disc portion 2 (22), but they are not coupled to each other. Accordingly, the disk portions 1 (21) and 2 (22) can be deformed almost independently through the respective elastic means and have their own vibration frequencies, so that the vibration preventing effect is enhanced. As shown in FIG. 3, the disc-shaped base metal of the present invention has a substantially donut-shaped hollow structure that forms a hollow portion 5 when two disc portions 1 and 2 are overlapped with each other. The disc-shaped base metal having such a configuration can support the grindstone layer 3 on both the inner peripheral side and the outer peripheral side, and the stress applied from the grindstone layer 3 is dispersed, which is advantageous in securing the base metal strength. It is.

  The spring constant relating to the disk-shaped base metal of the cup-shaped grindstone of the present invention is generally preferably more than 1000 kgf / mm and not more than 3000 kgf / mm. Although it depends on the grinding conditions, if it is 1000 kgf / mm or less, the cup-shaped grindstone tends to bend excessively. For this reason, the grinding load cannot be increased and high grinding efficiency may not be expected. If it exceeds 3000 kgf / mm, the bending effect is reduced, so that the vibration absorption effect tends to decrease. A more desirable spring constant is more than 1000 kgf / mm and not more than 2000 kgf / mm. In the present invention, the spring constant can be adjusted by changing the material and thickness of the disk portion constituting the base metal, and can be adjusted as appropriate depending on the number and size of the slits.

With the above configuration, the cup-shaped grindstone of the present invention has both flexibility and strength, and thus can cope with high-efficiency grinding with a high grindstone pressing force as described above.
Furthermore, in the said embodiment, the damping | dampening material which has the effect | action which absorbs the vibration which generate | occur | produced in the grindstone can be provided in the hollow part 5. Since the volume of the cavity 5 can be increased due to the structure of the base metal of the present invention, a sufficient amount of vibration damping material can be used, and a high effect can be expected in suppressing self-excited vibration. This is particularly effective for preventing chatter marks. The damping material may be filled in the entirety of the cavity 5 or may be applied or partially filled in an appropriate place with an appropriate amount. As the damping material, it is desirable to use a rubber material, in particular, a butyl rubber material having a damping action, but is not limited thereto.

  As a material of the disk-shaped base metal, a metal material is generally used in order to secure the base metal strength at the time of use. In general, since a metal material itself cannot have a high vibration damping effect, it is preferable to fill the cavity 5 of the disk-shaped base metal with a vibration damping agent as described above. On the other hand, special metal materials having vibration damping action have been developed. For example, in an iron-aluminum alloy, when a vibration is applied, a domain wall inside the material works, converts the applied energy into heat, and releases the heat to suppress the vibration. In the present invention, a special metal material having such a vibration damping action may be used.

  The plurality of slits 1c (21c) and 2c (22c) can be filled with a sealing material. The sealing material can prevent the grinding liquid from entering from the slit. Further, if a sealing material having a vibration damping action as described above is used, a greater vibration suppressing effect can be obtained. As the sealing material, it is desirable to use a silicon material or a silicon rubber material, but it is not limited thereto.

  The grindstone layer 3 (23) may be formed by arranging arc segment grindstones in a ring shape as shown in FIG. 1 (FIG. 4), or a grindstone integrated in a ring shape. You may stick and form. Details such as the material, shape, and dimensions of the grindstone layer are appropriately determined according to grinding conditions.

  The abrasive grains used for the grindstone layer 3 (23) are generally a group consisting of superabrasive grains such as CBN abrasive grains or diamond abrasive grains, alumina abrasive grains, silicon carbide abrasive grains, and zirconia abrasive grains. Although it is 1 or more types selected more, it is not specifically limited. The abrasive grains used or combinations thereof are appropriately selected according to the grinding conditions and the material of the material to be ground. The grain size of the abrasive grains may be in the range of 60/80 to 325/400 for superabrasive grains and 46 to 600 for other abrasive grains, but is not particularly limited. The details of the particle size are appropriately selected according to the grinding conditions and the material of the material to be ground.

  The grindstone binder used for the grindstone layer 3 (23) is selected from, but not limited to, vitrified, resinoid, metal, electrodeposition, brazing and the like. The type of grindstone binder to be used is appropriately selected according to the grinding conditions and the material of the material to be ground.

  The abrasive grain ratio in the grindstone layer 3 (23) may be in the range of 25 to 60% by volume and the porosity in the range of 0 to 50% by volume, but is not particularly limited. These are appropriately selected according to the grinding conditions and the material of the material to be ground. The binder ratio is a value obtained by subtracting the abrasive grain ratio and the binder ratio from 100.

  Since the 1st disk part 1 (21) is detachable, the grindstone of this invention can reproduce | regenerate and reuse the grindstone layer 3 (23) of the 1st disk part 1 (21) after a grinding operation. In addition, the second disk portion 2 (22), which is the base metal body, can be used repeatedly as long as it is permitted in terms of durability, which is advantageous in terms of economy. In addition, the first disc portion 1 on which the new grindstone layer 3 (23) is formed is stocked, and when the grindstone layer needs to be replaced, the first disc portion 1 (21) is immediately replaced, and the grinding operation can be performed immediately. Work efficiency is improved because it can be resumed.

  In the present specification, terms that mean directions or positions such as “upper”, “lower”, “upper” or “lower” are used with the intention of helping to understand the configuration of the present invention. . These terms should not be understood based on the vertical direction (gravity direction), but should be understood based on the load direction (rotational axis direction) of the grindstone used. For example, it should be understood that the load direction of the grindstone on the workpiece indicates “upward” and the opposite direction indicates “downward”.

  Next, with reference to FIG.6 and FIG.7, the effect | action at the time of grinding of the cup-shaped grindstone of this invention is demonstrated. FIG. 6 shows the cup-shaped grindstone of the first aspect of the present invention described above, and FIG. 7 shows the cup-shaped grindstone of the second aspect of the present invention described above.

  Referring to FIG. 6, the cup-shaped grindstone according to the first aspect of the present invention has an outer wall mainly having a plurality of slits 2c when a load is applied to the outer peripheral side of the grindstone layer 3, as shown in FIG. 6 (a). 2e is deformed to be crushed, and the outer peripheral side of the grindstone layer 3 is greatly sunk through this elastic function. As shown in FIG. 6B, when a load is applied to substantially the center of the grindstone layer 3, not only the outer wall 2e having a plurality of slits 2c but also the inner peripheral side of the annular flat plate portion 1a having a plurality of slits 1c is deformed. The entire grindstone layer sinks through these spring functions. As shown in FIG. 6 (c), when a load is applied to the inner peripheral side of the grindstone layer 3, the inner peripheral side of the annular flat plate portion 1a having a plurality of slits 1c is mainly deformed, and the grindstone layer is formed through this spring function. The inner peripheral side of 3 sinks.

  Next, referring to FIG. 7, the cup-shaped grindstone of the second aspect of the present invention mainly has a plurality of slits 22 c when a load is applied to the outer peripheral side of the grindstone layer 23 as shown in FIG. The outer wall 22e is deformed so as to be crushed, and the outer peripheral side of the grindstone layer 23 is greatly sunk through this elastic function. As shown in FIG. 7B, when a load is applied to substantially the center of the grindstone layer 23, not only the outer wall 22e having a plurality of slits 22c but also the inner wall 21b having a plurality of slits 21c are crushed similarly to the outer wall 22e. The entire grinding wheel layer sinks through these spring functions. As shown in FIG. 7 (c), when a load is applied to the inner peripheral side of the grindstone layer 23, the inner wall 21b having a plurality of slits 21c is mainly deformed so as to be crushed. The inner circumference sinks.

  As described above, the elastic function of the grindstone of the present invention does not depend on the bending at one fulcrum. For this reason, since the two elastic means cooperate in any contact state of the grindstone layer 3 (23), a large vibration suppressing effect and high followability to the surface to be ground are exhibited. As a result, since it is permitted to apply a higher grinding wheel pressing pressure, further efficient grinding can be desired.

  Examples of the present invention will be described below together with comparative examples. However, these examples illustrate the feasibility and usefulness of the present invention, and are not intended to limit the configuration of the present invention.

[Vibration damping test]
Example 1
A disc-shaped base metal of a cup-shaped grindstone configured as shown in FIGS. 2 and 3 was produced. The material of the disk-shaped base metal was stainless steel, and the dimensions were an outer periphery of 212 mm × height 55 mm × hole diameter 30 mm.

Example 2
The same disk-shaped base metal as in Example 1 was prepared, and the cavity was filled with a damping material (trade name SR-6000 manufactured by Saitama Rubber Industries), and a seal material (product number TSE3941 manufactured by GE Toshiba Silicone Co., Ltd.) in each slit. Filled.

Comparative Example 1
A base for a grindstone having the configuration shown in FIG. 11 was produced. The base metal was made of stainless steel, and the base metal had an outer diameter of 212 mm, a height of 55 mm, and a hole diameter of 30 mm.

Comparative Example 2
The same grindstone as in Comparative Example 1 was produced, and a dampening material (trade name SR-6000, manufactured by Saitama Rubber Industry Co., Ltd.) was filled in the groove type gap.
(Test procedure)
The attenuation performance of each grindstone was evaluated by measuring the decay rate of each of the above grindstones using an FFT analyzer (model number CF-910) manufactured by Ono Sokki Co., Ltd. The damping performance is evaluated by the magnitude of the decay rate of the time calendar response waveform obtained by the impulse hammer hit test. The measurement procedure is as follows. Attach an acceleration pickup to the impulse hammer and grindstone and connect to the 2-channel FFT. Thereafter, a constant impact force (applying an impact by its own weight from a certain height) is vibrated on the grindstone with an impulse hammer, and a time calendar waveform of the response is recorded (see FIG. 8). From the recorded time calendar response waveform, an attenuation curve of the amplitude is obtained by the following equation to calculate the attenuation rate (see FIG. 9).

(test results)
FIG. 10 shows attenuation curves obtained for the grindstones of Examples and Comparative Examples. The horizontal axis represents measurement time (s), and the vertical axis represents amplitude (μm).

  As shown in FIG. 10A, Example 1 was 2.0 times more excellent in vibration damping rate than Comparative Example 1. In Example 1, it was shown that the base metal has good flexibility. Although not intending to be bound by theory, in Example 1, there is free end support between the elastic means on the outer peripheral side having a particularly high spring coefficient and the upper plate portion having the grindstone layer, and each has different natural vibrations. For this reason, it is considered that when vibration is generated, the vibration energy loss at this portion increases, and the damping performance is improved.

As shown in FIG. 10B, Example 2 was 1.7 times better in vibration damping rate than Comparative Example 2. In addition to the case of Example 1 and Comparative Example 1, the vibration damping rate is further improved due to the action of the damping material. The base metal of Example 2 was shown to have a good damping effect.
[Grinding test]
The grindstone of the present invention is expected to exhibit good grinding performance in online roll grinding. On-line roll grinding is defined as grinding a rolling roll at the same time as performing a rolling operation of the steel sheet with a rolling roll in a steel sheet rolling line. If the rolling operation is temporarily stopped for flattening of the rolling roll, the efficiency of the rolling operation is reduced, so online roll grinding is required. The cup-shaped grindstone of the present invention is installed in a state in which a grindstone layer is pressed against the surface of a rotating rolling roll, and is further reciprocated in the longitudinal axis direction of the rolling roll, and thus used for a grinding operation.

  Typical working conditions are as follows. An example of a roll for rolling a steel material is a roll made of nickel grain. As the grinding conditions for the rolling roll, the roll peripheral speed is 5 m / s to 66 m / s, the grinding wheel pressing pressure is 0.5 kgf / mm to 10 kgf / mm, the oscillating speed is 20 m / s to 100 m / s, and the grinding wheel rotational speed is 25 m. / S to 50 m / s.

It is a perspective view of the cup-shaped grindstone which is the 1st aspect of this invention. It is a perspective view of the disk-shaped base metal of the grindstone of FIG. It is sectional drawing of the cup-shaped grindstone of FIG. It is a perspective view of the cup-shaped whetstone which is the 2nd mode of the present invention. It is a perspective view of the disk shaped base metal of the grindstone of FIG. It is a schematic diagram explaining the effect | action of the cup-shaped grindstone of the 1st aspect of this invention. It is a schematic diagram explaining the effect | action of the cup-shaped grindstone of the 2nd aspect of this invention. It is a schematic diagram which shows schematic structure of the FFT analyzer for measuring an attenuation factor. It is the graph used as the model for calculating | requiring an attenuation factor regarding the attenuation | damping performance test of an Example. It is a graph which shows the attenuation curve of each Example and a comparative example regarding an attenuation performance test. It is sectional drawing which shows the structure of the conventional grindstone.

Explanation of symbols

3,23 Grinding wheel layer 1,21 1st disk part 2,22 2nd disk part 5 Cavity part 1c, 2c, 21c, 22c Elastic means, a plurality of slits

Claims (7)

A cup-shaped grindstone for online roll grinding in which a grindstone layer is provided on the circumference of one surface of a disk-shaped base metal,
The disk-shaped base metal has a first disk part having an annular grindstone layer mounting surface, and a second disk part for supporting the first disk part, and the first disk part is on the inner peripheral side thereof. And is fixed to the second disk portion, and the second disk portion projects to the outer peripheral side so as to form a hollow portion below the first disk portion, and its outer peripheral edge is set to the outer peripheral edge of the first disk portion. It is configured to support this by contacting from below,
A cup-shaped grindstone for on-line roll grinding, characterized in that elastic means are provided on the inner peripheral portion and the outer wall portion of the disc-shaped base metal. 2. The online roll grinding according to claim 1, wherein elastic means are provided in a portion closer to the inner periphery than the grinding wheel layer mounting surface of the first disk portion and a portion of the outer wall of the second disk portion, respectively. Cup-shaped grinding wheel. The on-line roll according to claim 1, wherein elastic means are provided on each of the inner wall portion of the first disk portion and / or the second disk portion and the outer wall portion of the second disk portion. Cup-shaped grinding wheel for grinding.   The cup-shaped grindstone for online roll grinding according to any one of claims 1 to 3, wherein the elastic means is provided by forming a plurality of slits in at least a part of the portion. .   The cup-shaped grindstone for online roll grinding according to any one of claims 1 to 4, wherein the first disk portion is detachably provided from the base metal body.   The cup-shaped grindstone for online roll grinding according to claim 4 or 5, wherein the plurality of slits are filled with a sealing material.   The cup-shaped grindstone for online roll grinding according to any one of claims 1 to 6, further comprising a damping material in a hollow portion between the first disc portion and the second disc portion.

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