JP6936035B2 - Roll polishing jig and mounting structure of this jig - Google Patents

Description

The present invention relates to a roll polishing jig that transmits a rotational driving force from a roll polishing device that polishes (cylindrical polishing) the outer peripheral surface of a roll by rotating a roll (for example, a rolling roll) to the roll. Regarding the mounting structure of the jig to the roll.

Conventionally, as an apparatus for polishing the outer peripheral surface in order to correct the profile of the outer peripheral surface of a roll such as a rolling roll, for example, the one described in Patent Document 1 is known. FIG. 6 of Patent Document 1 shows the outer periphery of the body of a rolling roll including a cylindrical body used for rolling metal and a worn outer peripheral surface, and shafts provided at both ends of the body. A roll grinder for polishing the surface is described. Further, FIG. 7 of the same document discloses a button (turning metal) that transmits the rotational driving force from the roll grinder shown in FIG. 6 to the shaft portion of the rolling roll. This button has an arm portion that receives the rotational driving force from the roll grinder, and a portion that is directly attached to the shaft portion of the rolling roll and transmits the rotational driving force received by the arm portion to the shaft portion.

Jitsukaisho 61-99408 Gazette

However, since the scraping described in Patent Document 1 is directly attached to the shaft portion of the rolling roll, the following problems may occur. That is, as shown in FIG. 8 of the present application, when the bearing device 500 used at the time of rolling is attached to the outer periphery of the shaft portion 300 of the rolling roll 600, the shaft (turning metal) of Patent Document 1 is used as a shaft. If it is to be attached to the portion 300, a troublesome work of removing the bearing device 500 from the shaft portion 300 is required before attaching the button. Further, since the bearing device 500 is damaged when the bearing device 500 is removed from the shaft portion 300, when rolling is performed later, the bearing device 500 must be newly prepared and the bearing device 500 must be reattached to the shaft portion 300. There is a problem that the cost of parts and the work process are increased.

Therefore, in the present invention, in the roll polishing jig that transmits the rotational driving force from the roll polishing device that polishes the outer peripheral surface of the roll body portion by rotating the roll to the roll, the bearing device is provided on the outer periphery of the roll shaft portion. It is an object of the present invention to provide a roll polishing jig that can be attached to a roll without removing the bearing device even when the bearing device is attached, and a structure for attaching the jig to the roll.

(1) A roll polishing jig that transmits the rotational driving force from a roll polishing device that polishes the outer peripheral surface of the roll by rotating the roll with the bearing device attached to the roll. The present invention includes a body portion having an outer peripheral surface to be polished by the roll polishing device, a shaft portion to which the bearing device can be attached , and an intermediate portion provided between the body portion and the shaft portion. The roll polishing jig includes a mounted portion to be attached to the intermediate portion, and the mounted portion transmits the rotational driving force from the roll polishing device to the intermediate portion and has a divided structure. As a result, the roll polishing jig is characterized in that it can be attached to the intermediate portion in a state where the bearing apparatus is attached without removing the bearing apparatus from the shaft portion.

According to the configuration of (1) above, the roll polishing jig is attached to the intermediate portion (between the body portion and the shaft portion) of the roll. Therefore, even when the bearing device is attached to the outer periphery of the shaft portion, the roll polishing jig can be attached to the roll without removing the bearing device. As a result, when polishing the roll, the work of attaching the roll polishing jig to the roll can be easily performed, and the time required for the work can be shortened. Furthermore, since it is not necessary to remove the bearing device when attaching the roll polishing jig, it is possible to prevent the bearing device from being damaged due to the removal of the bearing device, and the frequency of replacement of the bearing device (consumables) can be reduced. It can be reduced and the cost of replacing the bearing device can be reduced.

(2) The described in (1), wherein the intermediate portion has a constricted portion having a diameter smaller than that of the body portion, and the attached portion has an fitting portion to be fitted into the constricted portion. Roll polishing jig.

According to the configuration of (2) above, the roll polishing jig is attached to the roll in a state where the fitting portion of the roll polishing jig is fitted into the constricted portion of the roll, so that the roll polishing jig can be attached to the roll. The mounting strength can be increased.

(3) Of the cross section of the constricted portion along the central axis direction of the roll, the constricted portion is constricted so that the outer line of the portion facing the fitting portion has an arc shape, and the fitting portion has the constricted portion. The fitting portion bulges toward the constricted portion so that the outer line of the portion of the cross section along the central axis direction of the roll facing the constricted portion forms an arc shape, and the outer line of the fitting portion is formed. The roll polishing jig according to (2), wherein the curvature of the above is substantially the same as the curvature of the outer line of the constricted portion.

According to the configuration of (3) above, since the contact area between the fitting portion and the constricted portion can be increased, the attachment strength of the roll polishing jig to the roll can be further increased.

(4) The roll polishing jig according to any one of (1) to (3) is attached to the roll, and the roll polishing jig is attached to the intermediate portion of the roll. A structure for mounting a roll polishing jig, which is formed so as to cover at least between the intermediate portion and the end portion on the intermediate portion side of the bearing device in the finished state.

According to the configuration of (4) above, when the body of the roll is polished with the polishing liquid, the polishing liquid is prevented from entering the bearing device from the end portion on the intermediate portion side of the bearing device. be able to.

According to the present invention, in a roll polishing jig that transmits a rotational driving force from a roll polishing device that polishes the outer peripheral surface of a roll body portion by rotating a roll to the roll, a bearing device is provided on the outer periphery of the roll shaft portion. Even when is attached, the roll polishing jig can be attached to the roll without removing the bearing device.

It is a front view which shows the jig for roll polishing which concerns on this invention. FIG. 1 is a partial cross-sectional view taken along the line AA in FIG. It is a BB direction arrow view in FIG. It is sectional drawing which shows the state which attached the roll polishing jig which concerns on this invention to a rolling roller (during polishing). FIG. 5 is a cross-sectional view showing a state in which the lid portion of the bearing device in FIG. 4 is cut along the radial direction. FIG. 4 is an arrow view in the CC direction in FIG. FIG. 5 is a cross-sectional view showing a state in which the roll polishing jig according to the present invention is removed from a rolling roller (during rolling). It is sectional drawing which shows the state which the bearing device is attached to the shaft part of the conventional rolling roll.

Hereinafter, the roll polishing jig according to the embodiment of the present invention and the structure for attaching the roll polishing jig to the roll will be described. The "roll" of the present invention means a body including a body portion, a shaft portion, and an intermediate portion provided between the body portion and the shaft portion. Specifically, for example, a rolling roll (roll for rolling metal) provided with the intermediate portion can be mentioned. In the following description, a case where the roll is a rolling roll provided with the intermediate portion will be described. Further, the "roll polishing device" of the present invention refers to a device that polishes the outer peripheral surface of the roll body. Specifically, for example, an apparatus (rolling roll polishing apparatus) for polishing the outer peripheral surface of the body of the rolling roll can be mentioned. In the following description, a case where the roll polishing apparatus is a rolling roll polishing apparatus will be described.

In the rolling roll polishing apparatus of the present embodiment, the rolling roll 6 is placed around the central axis of the rolling roll 6 (see FIG. 4) in a state where a polishing member (not shown) is in contact with the outer peripheral surface of the body portion 2. It is a device that polishes the outer peripheral surface of the body portion 2 by rotating the body portion 2.

The roll polishing jig 1 according to the present embodiment is a jig for transmitting the rotational driving force of the rotary driving unit included in the rolling roll polishing apparatus to the rolling roll 6, a so-called turning metal (scratch). As shown in FIG. 4, the roll polishing jig 1 is configured so that it can be attached to the rolling roll 6 with the bearing device 5 attached to the outer periphery of the shaft portion 3 of the rolling roll 6. .. The roll polishing jig 1 can be attached to either of the two intermediate portions 4 of the rolling roll 6, but when the work of polishing the outer peripheral surface of the roll is performed, it is usually shown in FIG. As described above, it is used by being attached only to one of the intermediate portions 4.

Hereinafter, before the roll polishing jig 1 is described in detail, the rolling roll 6 to which the roll polishing jig 1 is attached and the bearing device 5 attached to the shaft portion 3 of the rolling roll 6 will be described.

(Structure of rolling roll)
The rolling roll 6 will be described with reference to FIG.
The rolling roll 6 to which the roll polishing jig 1 is attached includes a shaft portion 3 located on both sides of the rolling roll 6 in the axial direction, a body portion 2 provided between both shaft portions 3, and a shaft portion 2. It is provided with an intermediate portion 4 provided between the body portion 3 and the body portion 3.

The body portion 2 is a portion for rolling metal. When rolling is performed on the body portion 2, the outer peripheral surface 2a of the body portion 2 may be worn and the profile of the outer peripheral surface 2a may change. In this case, it is necessary to polish the outer peripheral surface 2a of the body portion 2 in order to correct the profile.

The shaft portion 3 is rotatably supported by a roll support portion (not shown) of the rolling mill via the bearing member 5 in a state where the bearing device 5 is attached to the outer periphery thereof. In the example shown in FIG. 4, the shaft portion 3 is formed so that the diameter gradually decreases as the distance from the body portion 2 increases. Specifically, the shaft portion 3 has a large diameter portion 30, a medium diameter portion 31 having a diameter smaller than that of the large diameter portion 30, and a diameter smaller than that of the medium diameter portion 31, in order from the side closer to the body portion 2. A small diameter portion 32 is provided, and the large diameter portion 30, the medium diameter portion 31, and the small diameter portion 32 are integrally formed. Further, a male screw portion 33 is formed on the outer circumference of the tip portion (the end portion on the side farther from the body portion 2) of the small diameter portion 32.

The intermediate portion 4 is a portion connecting the body portion 2 and the shaft portion 3. The intermediate portion 4 includes a constricted portion 40 having a diameter smaller than that of the body portion 2 and a drainage portion 41 provided on the shaft portion 3 side of the constricted portion 40 and having a diameter larger than that of the constricted portion 40.

In the example shown in FIG. 4, the constricted portion 40 is an outer line of a radial outer portion (a portion facing the inner portion 12 described later) in a cross section of the constricted portion 40 along the axial direction D of the rolling roll 6. 40a is confined so as to form an arc. The constricted shape of the constricted portion 40 is not limited to the arc shape, and may be another shape.

The drainage portion 41 prevents the cooling water used for cooling the body portion 2 from flowing beyond the intermediate portion 4 to the shaft portion 3 side when rolling is performed on the body portion 2. The drainage portion 41 is provided continuously with the constriction portion 40. The drainage portion 41 stops the cooling water that has flowed into the constricted portion 40 and reaches the drainage portion 41 among the cooling water used for cooling the body portion 2, and the centrifugal force generated by the rotation of the rolling roll 6. As a result, the cooling water is splashed outward in the radial direction of the rolling roll 6. This prevents the cooling water from flowing beyond the intermediate portion 4 to the shaft portion 3 side and entering the bearing device 5.

(Structure of bearing device)
The bearing device 5 will be described with reference to FIGS. 4 to 6.
The bearing device 5 includes a bearing 50 provided on the outer periphery of the shaft portion 3 (small diameter portion 32 in the example shown in FIG. 4) of the rolling roll 6, and a cylinder that holds the bearing 50 so as to cover the bearing 50 from the outer peripheral side. The shape of the chock 51, the bearing nut 53 and the chrysanthemum washer 54 that fix the inner race 50a of the bearing 50 to the shaft portion 3, and the lid that is detachably provided on the opening end portion 51a of the chock 51 on the side opposite to the body portion 2. A portion (chock cover) 52 and a sealing member 58 provided between the lid portion 52 and the shaft portion 3 are included.

In the example shown in FIG. 4, the bearing 50 is configured by combining three bearings (ball bearings).

The chock 51 has a through hole 51b penetrating in the axial direction D, and the bearing 50 is fitted in the inner circumference of the through hole 51b. Further, in the through hole 51b, two ring-shaped sealing members 57 and 59 are fitted on the inner circumference of the body 2 side of the bearing 50. One of the sealing members 57 is in sliding contact with the outer peripheral surface of the large diameter portion 30 of the shaft portion 3 and seals between the outer peripheral surface of the large diameter portion 30 and the inner peripheral surface of the through hole 51b. The other sealing member 59 is in sliding contact with the outer peripheral surface of the middle diameter portion 31 of the shaft portion 3 and seals between the outer peripheral surface of the middle diameter portion 31 and the inner peripheral surface of the through hole 51b. Further, a female screw portion 51c into which the bolt 55 is screwed is formed at the end portion of the chock 51 on the side opposite to the body portion 2.

A female threaded portion 53a is formed on the inner circumference of the bearing nut 53. When the female threaded portion 53a is screwed with the male threaded portion 33 of the shaft portion 3, the inner race 50d of the bearing 50 is fixed to the shaft portion 3 via the chrysanthemum washer 54 and the bearing nut 53.

The lid portion 52 has a through hole 52a capable of projecting the leg portion of the bolt 55 toward the body portion 2 while holding the head portion of the bolt 55. The lid portion 52 can be attached to the chuck 51 by screwing the male screw portion of the bolt 55 with the female screw portion 51 of the chock 51 while holding the head portion of the bolt 55 in the through hole 52a.

A center hole 52b is formed in the central portion of the lid portion 52. The center hole 52b is a hole for aligning (centering the shaft) and supporting the rolling roll 6 when polishing the body portion 2. Specifically, by inserting a center pen (not shown) into the center hole 52b, the rolling roll 6 can be aligned and rotatably supported.

The seal member 58 is in close contact with the peripheral edge of the center hole 52b in the lid 52 and the end surface of the shaft 3. Therefore, the seal member 58 can prevent water from entering through the center hole 52b and prevent the bearing device 5 from rotating relative to the shaft portion 3 when the rolling roll 6 is polished.

The lid portion 52 can be replaced with the lid portion 56 (see FIG. 7) used when rolling in the body portion 2. Unlike the lid portion 52, the lid portion 56 does not have a center hole 52b formed. Therefore, when rolling is performed on the body portion 2 with the lid portion 56 attached, cooling water or the like used for cooling the body portion 2 can enter the bearing device 5 through the lid portion 56. It can be reliably prevented. Further, no sealing member is provided between the lid portion 56 and the shaft portion 3. Therefore, when rolling with the rolling roll 6, the shaft portion 3 can be rotated relative to the chock 51.

(Structure of roll polishing jig)
The roll polishing jig 1 will be described with reference to FIGS. 1 to 4. Note that FIG. 2 shows a state in which the divided body 19a on the upper side of the paper surface is viewed from the side and a state in which the divided body 19b on the lower side of the paper surface is cut along the line AA of FIG.

As shown in FIGS. 1, 2 and 4, the roll polishing jig 1 according to the present embodiment is configured by connecting the two divided bodies 19a and 19b with a fastening member 18 such as a bolt or a nut. ..

The divided body 19a and the divided body 19b have the same shape as each other. The divided body 19a and the divided body 19b each have a base portion 21 forming a semicircle when viewed from the axial direction D (see FIGS. 2 and 4) and an arm extending radially outward from the circumferential central portion of the base portion 21. A unit 11 is provided (see FIGS. 1, 2 and 4).

The arm portion 11 is a portion that receives a rotational driving force (force in the direction indicated by the arrow E) from the rotating member 110 (see FIG. 1) of the rolling roll polishing device and transmits the rotational driving force to the base portion 21. The rotating member 110 is a pin that transmits the rotational driving force of the driving motor (not shown) of the rolling roll polishing device to the arm portion 11, and by rotating in the direction of arrow E in a state of being in contact with the arm portion 11. , The arm portion 11 is rotated in the direction of arrow E.

As shown in FIG. 4, the base portion 21 is attached to the intermediate portion 4 of the rolling roll 6 in a state where the bearing device 5 is attached to the shaft portion 3 of the rolling roll 6. The base portion 21 transmits the rotational driving force received from the arm portion 11 to the rolling roll 6. The base portion 21 is configured so as not to interfere with the bearing device 5 when the base portion 21 is attached to the intermediate portion 4. The base portion 21 corresponds to the “attached portion” of the present invention.

As shown in FIGS. 1, 2 and 4, the base portion 21 is located inside the outer portion 20 having an arc shape (viewed from the axial direction D) continuous with the arm portion 11 and the outer portion 20 in the radial direction R. Includes the inner portion 12 of the arc shape (as viewed from the axial direction D). As shown in FIG. 2, the inner portion 12 protrudes toward the body portion 2 side by a distance d1 from the end portion of the outer portion 20 on the body portion 2 side. That is, the end portion of the outer portion 20 on the body portion 2 side is located on the shaft portion 3 side by a distance d1 from the end portion of the inner portion 12 on the body portion 2 side. At the distance d1, when the roll polishing jig 1 is attached to the rolling roll 6 and the body 2 is polished by a polishing member (not shown), the polishing member does not interfere with the roll polishing jig 1. Value is set.

Further, as shown in FIGS. 2 to 4, the end portion of the outer portion 20 on the shaft portion 3 side is located on the shaft portion 3 side by a distance d2 from the end portion of the inner portion 12 on the shaft portion 3 side. The distance d2 is such that the roll polishing jig 1 is attached to the rolling roll 6 (see FIG. 4), and the outer portion 20 is at least the drainage portion 41 of the intermediate portion 4 and the intermediate portion 4 in the bearing device 5. The value is set so as to cover the gap 60 between the side end portion.

The inner portion 12 is a portion to be fitted into the constricted portion 40 (see FIG. 4) of the rolling roll 6. The inner portion 12 corresponds to the "fitting portion" of the present invention. As shown in FIGS. Is bulging toward the constricted portion 40 side so as to form an arc shape. The curvature of the outer line 12a of the inner portion 12 substantially coincides with the curvature of the outer line 40a of the constricted portion 40.

Further, as shown in FIGS. 1 and 3, each of the divided body 19a and the divided body 19b includes a flange portion 22 extending radially outward from both ends in the circumferential direction of the outer portion 20. That is, the divided body 19a and the divided body 19b each include two flange portions 22. Each flange portion 22 is formed with a bolt insertion hole 14 that penetrates the flange portion 22 in the thickness direction.

As shown in FIG. 1, one flange portion 22 of the split body 19a and one flange portion 22 of the split body 19b are opposed to each other, and the bolt insertion holes 14 of the flange portions 22 and 22 are aligned with each other. The other flange portion 22 of the split body 19a and the other flange portion 22 of the split body 19b are opposed to each other, and the bolt insertion holes 14 of the flange portions 22 and 22 are aligned with each other, and the bolt insertion holes 22 are aligned. By inserting the leg portion 15 of the bolt 13 into the bolt 13 and fastening the nut 16 to the bolt 13, the split body 19a and the split body 19b can be combined.

(Mounting method and mounting structure of roll polishing jig on rolling roll)
The method of attaching the roll polishing jig 1 to the rolling roll 6 and the attachment structure will be described.
The roll polishing jig 1 is attached to the rolling roll 6 when the body 2 of the rolling roll 6 is polished by the rolling roll polishing device (see FIG. 4). Further, the roll polishing jig 1 is removed from the rolling roll 6 when rolling with the rolling roll 6 (see FIG. 7).

When the roll polishing jig 1 is attached to the rolling roll 6, as shown in FIG. 4, the roll polishing jig 1 is attached to the outer periphery of the shaft portion 3 of the rolling roll 6 and the bearing device 5 is attached. The jig 1 is attached to the intermediate portion 4 of the rolling roll 6.

More specifically, as shown in FIG. 4, the split body 19a and the split body 19b are arranged so that the inner portion 12 of the roll polishing jig 1 is fitted into the constricted portion 40 of the rolling roll 6. The split body 19a and the split body 19b are tightened by screwing the bolt 13 and the nut 16 so as to narrow the distance between the split body 19a and the split body 19b. In a state where the divided body 19a and the divided body 19b are tightened, there is a gap between the flange portions 22 and 22 of the divided body 19a and the divided body 19b facing each other. By performing such tightening, the inner portions 12 of each of the split body 19a and the split body 19b are brought into close contact with the constricted portion 40, and the roll polishing jig 1 is attached to the intermediate portion 4 of the rolling roll 6. As a result, in a state where the roll polishing jig 1 is attached to the intermediate portion 4 of the rolling roll 6, the inner portion 12 of the roll polishing jig 1 is at least the intermediate portion 4 and the intermediate portion in the bearing device 5. Covers the gap 60 with the end on the 4th side. Further, the roll polishing jig 1 is arranged at a position where it does not interfere with the polishing member for polishing the body portion 2.

Further, the lid portion 56 (see FIG. 7) used during rolling is replaced with the lid portion 52 (see FIG. 4) in which the center hole 52b is formed. As a result, a center pen (not shown) can be inserted into the center hole 52b to align and rotate the rolling roll 6 for cylindrical polishing.

(effect)
According to the present embodiment, the roll polishing jig 1 (the jig that transmits the rotational driving force of the rolling roll polishing device to the rolling roll 6) is the intermediate portion 4 (body portion 2 and shaft) of the rolling roll 6. It is attached to the part 3). Therefore, even when the bearing device 5 is attached to the outer periphery of the shaft portion 3, the roll polishing jig 1 can be attached to the rolling roll 6 without removing the bearing device 5. As a result, the work of attaching the roll polishing jig 1 to the rolling roll 6 can be easily performed, and the time required for the work can be shortened. Further, since the removal work of the bearing device 5 when attaching the roll polishing jig 1 becomes unnecessary, it is possible to prevent the bearing device 5 from being damaged due to the removal of the bearing device 5, and the bearing device 5 (consumables). ) Can be reduced, and the labor and cost required for replacing the bearing device 5 can be reduced.

In the above embodiment, the rolling roll has been described as an example of the polishing target, but other types of rolls may be the polishing target.

According to the method of the present invention, the roll polishing jig 1 can be attached to the rolling roll 6 without removing the bearing device 5, thereby reducing the labor and cost required for the replacement of the bearing device 5. Therefore, it is expected to contribute to the improvement of the productivity of rolled steel sheets.

1 Roll polishing jig 2 Body part 3 Shaft part 4 Intermediate part 5 Bearing device 6 Roll for rolling 12 Inner part (fitting part)
12a Inner outline 21 Base (attached part)
40 Constriction 40a Outline of constriction 50 Bearing 51 Chock 52 Lid 60 Gap 110 Rotating member

Claims (4)

A roll polishing jig that transmits the rotational driving force from a roll polishing device that polishes the outer peripheral surface of the roll by rotating the roll with the bearing device attached to the roll.
The roll includes a body portion having an outer peripheral surface to be polished by the roll polishing device, a shaft portion to which the bearing device can be attached , and an intermediate portion provided between the body portion and the shaft portion. ,
The roll polishing jig is
It is provided with an attached portion to be attached to the intermediate portion.
The attachment portion transmits the rotational driving force from the roll polishing device to the intermediate portion, and also
The split structure makes it possible to attach the bearing device to the intermediate portion without removing the bearing device from the shaft portion. Ingredients. The intermediate portion has a constricted portion having a diameter smaller than that of the body portion.
The roll polishing jig according to claim 1, wherein the attached portion has an fitting portion to be fitted into the constricted portion. Of the cross section of the constricted portion along the central axis direction of the roll, the constricted portion is constricted so that the outer line of the portion facing the fitting portion forms an arc shape.
Of the cross section of the fitting portion along the central axis direction of the roll, the fitting portion bulges toward the constricted portion so that the outer line of the portion facing the constricted portion forms an arc shape.
The roll polishing jig according to claim 2, wherein the curvature of the outer line of the fitting portion substantially matches the curvature of the outer line of the constricted portion. The structure for attaching the roll polishing jig according to any one of claims 1 to 3 to the roll.
The roll polishing jig is formed so as to cover at least between the intermediate portion and the end portion on the intermediate portion side of the bearing device in a state of being attached to the intermediate portion of the roll. mounting structure of the roll polishing jig, characterized in that there.

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