JPH07328900A - Roller grinder - Google Patents

Abstract

PURPOSE:To speedily replace holders to support rollers to be ground. CONSTITUTION:Holders 44a and 45a to rotatably support a roller 43a while coming into contact with an outer peripheral surface, contains contact members 51a and 53a and base stand members 50 and 52. When a roller 43b having a different outside diameter is used, the contact members 51a and 53a are replaced. A habit metal part is arranged in a slidingly movable part of the contact members 51a and 53a. The base stand members 50 and 52 may be fixed to a receiving stand 41 as they are. The lightweight contact members 51a and 53a can be speedily and easily replaced. Even in replacement of a rotary grinding wheel to grind the rollers 43a and 43b, in order to facilitate mounting- demounting on/from a grinding wheel shaft, a nut member is fastened through a divisible collar.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll grinder for grinding rolls of a rolling mill for rolling metal materials.

[0002]

2. Description of the Related Art Conventionally, rolls of a rolling mill are ground by a roll grinder 1 as shown in FIGS. 18 is a plan view, and FIG. 19 is a front view showing a state in which the roll is being ground. The roll is rotationally driven by the headstock 2 at one end side in the axial direction, and the other end side is supported by a tailstock 4 which is slidably displaced on the bed 3 in the axial direction. Spindle 5 of spindle headstock 2 and tailstock shaft 6 of tailstock 4
And is rotatably supported from both ends in the axial direction while centering the roll. In the tailstock 4, the clamp 7 grips the outer peripheral end surface of the roll to transmit the rotational driving force.
A rotary whetstone 9 is attached to the whetstone 8 for grinding the outer peripheral surface of the roll.
On the bed 10 provided in parallel with the bed 3 for sliding the tailstock 4, and can be slidably displaced in parallel to the axial direction of the roll. When the roll to be ground is rotationally driven on the bed 3 and the grindstone base 8 moves on the bed 10 in the axial direction of the roll, the rotary grindstone 9 spirals on the outer peripheral surface of the roll while moving relatively in the axial direction of the roll. It will be ground into a shape.

On the bed 3, pedestals 11 and 12 are provided so as to be slidably displaced in the axial direction of the roll. Cradle 11,1
2 supports the shoulders of both ends of the roll 13 to be ground while contacting the shoulders, i.e. the journals which are fitted into the bearings in the chock when incorporated into a rolling mill. The roll 13 is a heavy object, and it is difficult to support it only from the main shaft 5 and the tailstock shaft 6 from both ends in the axial direction. Therefore, with respect to the weight of the roll 13 and the pressing force of the rotary grindstone 9, It must be supported by 11,12.

FIG. 20 shows a structure related to one of the pedestals 11. In order to support the roll 13 while rotating it, on the outer peripheral portion of the roll 13, there are a gold-plated gold plate 1 provided on the side opposite to the side ground by the rotary grindstone and on the lower side.
4, 15 contact. Each receipt 14, 15 is a holder 16
It is attached by means of bolts 17. The pedestal 11 can be slidably displaced on the bed 3 in a direction perpendicular to the paper surface of FIG. 20 via a linear bearing 18 and a static pressure guide member. On the pedestal 11, a roll presence / absence detector 19 for detecting the presence / absence of the roll 13 and a lubricator 20 for lubricating the contact portion between the outer peripheral surface of the roll 13 and the surfaces of the receivers 14 and 15 are provided. Is provided.

The receiving members 14 and 15 rotatably support the roll 13 while slidingly contacting the outer peripheral surface of the roll 13. Therefore, a bearing material such as Babbitt metal is used at least in the contact portion. Even if the diameter of the roll 13 changes and becomes large, for example, 13a, both the axis of the roll 13a and the axis of the roll 13 are shown in FIGS.
Since the main shaft 5 and the tailstock shaft 6 are positioned at the same position, it is necessary to replace the receiving members 14 and 15 with shorter ones.

The roll 13 is, for example, a work roll, an intermediate roll or a backup roll of a multi-stage rolling mill or a multi-stage rolling mill such as a cluster type, and a plurality of types are often used in one rolling mill. . Providing a dedicated roll grinder for each different roll poses problems in terms of factory installation space and equipment costs. for that reason,
It is also possible to grind different types of rolls 13 and 13a while exchanging the receivers 14 and 15 according to the diameters of the rolls 13 and 13a.

FIG. 21 shows a construction related to the attachment of the rotary grindstone 9 shown in FIG. The whetstone body 21 is generally in the shape of a donut, and the central portion thereof is sandwiched between the wheel center 22 and the flange 23. A bolt 24 fastens between the wheel center 22 and the flange 23. An annular groove 25 is provided near the outer periphery of the surface of the flange 23, and a balance weight 26 can be appropriately attached to balance the entire rotary grindstone 9. A mounting hole 27 is formed in the center of the wheel center 22. A grindstone shaft 28 of a roll grinder is fitted into the mounting hole 27. Since the grindstone shaft 28 is tapered, the inner surface of the mounting hole 27 is also formed in a shape matching the taper.

A threaded portion 29 is formed at the tip of the grindstone shaft 28. The screw member 29 has a nut member 3 from the front end side.
Screw 0. The nut member 30 presses the end surface of the wheel center 22 via the collar 31. Wheel center 22
At the end face of the mounting hole 27, the outer diameter d2 of the nut member 30 is larger than the inner diameter d1 of the mounting hole 27, and the outer diameter d3 of the collar 31 is larger than d2. Because of such a relationship, when the nut member 30 is tightened, the end surface of the wheel center 22 pressed by the collar 31 and the tip of the grindstone shaft 28 are fixed.

[0009]

In the work of exchanging the receiving plates 14, 15 as shown in FIG. 20 according to the diameters of the rolls 13, 13a, the receiving plates 14, 15 are, for example, 150-2.
Since it weighs as much as 00 kg, it must be precisely positioned using a hoist or crane and fixed with bolts. Since it is necessary to work the hoist or crane at the same time as the positioning and bolting, it is necessary for a plurality of people to work.

A rotary grindstone 9 as shown in FIG. 21,
In the joint structure with the grindstone shaft 28, the grindstone shaft 28 and the mounting hole 27
Since and are precisely molded and inserted so as to be in close contact with each other, it is very difficult to remove them after they are once joined. When removing the nut member 30, first attach the nut member 30 to the grindstone shaft 28.
Loosen it from the screw part 29 and remove it.
It is necessary to pull out from 9. The outer diameter d2 of the nut member and the outer diameter d3 of the collar 31 are larger than the inner diameter d1 of the mounting hole 29, and it is possible to pull out the grindstone shaft 28 from the wheel center 22 while leaving the nut member 30 in the screw portion 29. Because you can't. Even after the nut member 30 and the collar 31 are removed, the grindstone shaft 28 is fitted in the mounting hole 27 in close contact, so unless the joint state is loosened by tapping from the screw portion 29 side with a wood hammer or the like. The rotating grindstone 9 cannot be removed from the grindstone shaft 28. When the tip of the threaded portion 29 is tapped with a wood hammer or the like, the thread of the threaded portion 29 is easily crushed, and the nut member 3
It becomes impossible to smoothly attach and detach 0. As described above, loosening the joined state by hitting with a wood hammer or the like has a safety problem, and it takes a long time for replacement and is inefficient.

An object of the present invention is to enable quick receipt of money and replacement of a rotary grindstone, shorten down time during which a roll is not ground, improve operating rate, and improve efficiency and productivity. The purpose is to provide a roll grinder.

[0012]

SUMMARY OF THE INVENTION According to the present invention, a roll is centered at both ends in the axial direction and rotationally driven, and a rotary grindstone is ground while a support is partially brought into contact with and supported by an outer peripheral surface of the roll. In the grinding machine, the receiving member includes a contact member in which a portion in contact with the outer peripheral surface of the roll is formed of a bearing material, and a base member in which the contact member is detachably attached to the tip and the base end is fixed to the roll grinder. It is a roll grinding machine characterized by including.

The base member of the present invention is divisible.

Further, the present invention provides a roll grinder in which a roll is centered at both ends in the axial direction and rotationally driven to grind with a rotary grindstone while partially supporting a support on an outer peripheral surface of the roll and supporting it. At the center of the rotary grindstone, a mounting hole into which a grindstone shaft for rotation driving is inserted is formed, and is screwed to the tip of the grindstone shaft in a state of being fitted to the central shaft of the rotary grindstone, and the outer diameter is the above-mentioned. A nut member smaller than the inner diameter of the mounting hole, and interposed between the nut member and the rotary whetstone, the outer diameter is larger than the inner diameter of the mounting hole, the inner diameter is smaller than the outer diameter of the nut member, in the circumferential direction. A roll grinder including a color that can be divided.

Further, around the mounting hole of the rotary grindstone of the present invention, the grindstone shaft is axially moved in a state in which the nut member is loosely screwed to the tip of the grindstone shaft to remove the collar radially outward. It is characterized in that a hooking portion is provided for hooking a pulling jig that is pressed to pull out from the rotary grindstone.

[0016]

According to the present invention, the receiving member for rotatably supporting the roll includes a contact member whose contact portion with the outer peripheral surface of the roll is formed of a bearing material, and a base member to which the contact member is attachable / detachable to the tip. Including and By exchanging the contact member according to the outer diameter of the roll, it is possible to adapt to the change in the outer diameter of the roll while the base member remains fixed to the roll grinder. Since it is not necessary to replace the entire receiving money and the contact member that can be formed in a light weight can be replaced, the work can be performed quickly and easily.

Further, according to the present invention, since the base member can be divided, it is possible to cope with a wider range of roll diameter than a simple exchange of the contact member.

Further, according to the present invention, the outer diameter of the nut member for coupling the rotary grindstone and the grindstone shaft is smaller than the inner diameter of the mounting hole into which the grindstone shaft is inserted. A collar that has an outer diameter larger than the inner diameter of the mounting hole and an inner diameter smaller than the outer diameter of the nut member and is dividable in the circumferential direction is interposed between the nut member and the rotary grindstone. When the grindstone shaft and the rotary grindstone are coupled, the coupled state can be maintained by tightening the nut member with the collar interposed. When removing the rotating grindstone from the grindstone shaft, you can loosen the nut member to open the collar that can be divided in the circumferential direction in the radial direction, and then remove the grindstone shaft from the rotating grindstone with the nut member left. Can be pulled out. Since the nut member only needs to be loosened to remove the collar, the work of pulling out the grindstone shaft from the mounting hole of the rotary grindstone can be performed quickly.

Further, according to the present invention, around the mounting hole of the rotary grindstone, there is provided a locking portion for locking a pulling jig for pushing the grindstone shaft in the axial direction to pull out the rotary grindstone. There is. Since the grindstone shaft can be pulled out from the rotary grindstone by using such a jig, the screw can be safely and quickly removed without damaging the screw or the like provided at the tip of the grindstone shaft.

[0020]

EXAMPLE A roll grinder according to an example of the present invention will be described below. FIG. 1 shows a configuration related to a money receiver, FIGS. 2 to 4 show an exchange state of the money receiver corresponding to a change in roll diameter, and FIGS. 5 to 10 show shapes of contact members of the money receiver that come into contact with a roll. FIG. 11 shows a structure of a base member to which a contact member is attachable and detachable, and FIG. 12 shows a structure for ensuring dimensional accuracy when the contact member and the base member are combined,
FIG. 13 shows the connection state of the rotary grindstone and the grindstone shaft and the construction of the removal jig for removal, FIG. 14 shows the shape of the nut member, FIG. 15 shows the shape of the collar, and FIG. FIG. 17 shows a shape of a spanner for tightening and loosening the nut member on the grindstone shaft.

In FIG. 1, the pedestal 41 can be slidably displaced on the bed 42. The direction of sliding displacement is parallel to the axial direction of the rolls 43a and 43b to be ground. The roll 43a is rotatably supported while being in contact with the receiving members 44a and 45a. The money receivers 44a and 45a are fixed to the holder 46 by bolts 47. A linear bearing 48 is provided to smoothly perform the sliding displacement of the pedestal 41 on the bed 42. A more precise static pressure guide system may be used. The presence / absence of the roll 43a is detected by the roll presence / absence detector 49. Performing the operation for roll grinding despite the absence of the rolls 43a, 43b is a waste of time and significantly reduces the operating rate of the roll grinder.

The receiving member 44a includes a base member 50 and a contact member 5.
1a and. Receiving money 45a includes base member 52 and contact member 53a. Between the money received 44a and the money received 45a,
A holder 46 is provided to hold the gold receiving members 44a and 45a tightened by the bolt 47. A linear bearing 48 and the like are provided in a sliding portion between the pedestal 41 and the bed 42. The presence / absence of the rolls 43a and 43b is detected by the roll presence / absence detector 49. When the roll presence / absence detector 49 detects that the rolls 43a and 43b are not mounted, neither the movement of the rotary grindstone in the roll axis direction nor the feed in the direction perpendicular to the roll axis direction is performed.

The receiving member 44a includes a base member 50 fixed to the receiving base 41 and the holder 46, and a contact member 51a detachable from the tip of the base member 50. Further, the money receiver 45a includes a base member 52 fixed to the base 41, and a contact member 53a detachable from the tip of the base member 52. When grinding the rolls 43b having different diameters, the contact members 51a and 53
By exchanging a, the axis of the roll 43b is aligned with the central axis of the roll grinder.

2, 3 and 4 show that the rolls 43a, 43b and 43c having different diameters are received by the receiving plates 44a and 44, respectively.
The contact member 51a, 51b, 51c and the contact member 53a, 53b, 53c which form b and 44c and the receiving money 45a, 45b, 45c, respectively are shown separately.
The base member 50 can be further divided into a base 54 and a spacer 55. The base member 52 can be divided into a base 56 and a spacer 57. The base 54 is fixed to the pedestal 41 shown in FIG. 1 with bolts 58. 2 and 3, the contact members 51a and 51b are detachably attached to the spacer 55 with bolts 59.
The contact members 53a and 53b are detachably attached to the spacer 57 by bolts 59. In FIG. 4, the contact member 51c is directly attached to the base 54 by the bolt 59, and the contact member 53c is directly attached to the base 56 by the bolt 59. In FIG. 4, since the spacers 55 and 57 of FIGS. 2 and 3 are not used, the roll 43c having a larger outer diameter can be accommodated.

5, FIG. 6, FIG. 7, FIG. 8, FIG. 9 and FIG.
0 is the contact members 51a, 53a, 51b, 53b, 51
The shapes of c and 53c are shown in a front view (A), a right side view (B), and a plan view (C), respectively. Babbitt metal, which is a typical bearing material, is formed by casting in a portion of each contact member 51a, 51b, 51c; 53a, 53b, 53c that comes into contact with and slides on the outer peripheral surfaces of the rolls 43a, 43b, 43c. A babbit metal part 60 is provided.
The babbitt metal part 60 is a front view shown in (A) and (C).
As shown in the plan view of, two rolls are formed at intervals in the axial direction of the corresponding roll. The surface of the babbit metal portion 60 is matched with the shape of the outer peripheral surface of the roll as shown in FIG. Like Babbitt metal, contact with other bearing materials such as bearing alloys such as white metal, sintered bearing alloys such as OILES metal impregnated with lubricating oil, or non-metals such as Teflon resin with good lubricity You may form a part.

The babbitt metal portion 60 is formed on the surface of the main body 61 made of a general structural steel material such as SS material. A ridge 62 extending in the axial direction of the roll is formed on the back surface of the main body 61. A recess 63 is provided to form the bavit metal portion 60 by casting on the surface of the main body 61. Since the part of the babbit metal portion 60 is formed by fitting in the recess 63, the babbit metal portion 60 is firmly joined to the surface of the main body 61. The body 61 is also provided with a mounting hole 64 for fixing the contact member to the pedestal with a bolt. Further, a hanging screw hole 65 into which a hook for hanging the contact member is screwed may be provided. The contact member according to the present embodiment is lightened to a weight of 10 to 20 kg, so that the attachment / detachment work to / from the pedestal can be performed quickly and easily.

FIG. 11 shows an assembled state of the receiving stands 41, 42 shown in FIG. FIG. 11A shows spacers 55 and 57.
11B is a side view of the bases 54 and 56, and FIG. 11C is a plan view of the spacers 55 and 57. The spacer 55 has a groove 6 in the axial direction of the roll.
6 and the ridge 67 are formed. A groove 68 is formed in the base 54 in the axial direction of the roll. An attachment hole 69 is formed in the spacer 55 in a direction from the groove 66 to the ridge 67. Further, a mounting hole 70 is also formed perpendicularly to the mounting hole 69 and the axial direction of the roll. A bolt 47 for fixing to the pedestal 41 is inserted into the mounting hole 70.

Grooves 71 and ridges 72 are formed in the spacer 57 so as to extend in the axial direction of the roll. A groove 73 is formed in the base 56 so as to extend in the axial direction of the roll. A mounting hole 74 is formed for inserting a bolt for joining the spacer 57 and the base 56. Cradle 4
A mounting groove 75 for fixing to 1 with a bolt and a mounting groove 76 which is a part of the mounting groove are also formed.

FIG. 12 shows a ridge 62 formed on the contact member.
And (A) the state of connection with the groove 66 formed in the spacer.
Indicate. The ridges 62 are the grooves 71 and the grooves 7 shown in FIG.
3 is also fitted. The same applies to the fitting state between the protrusions 67 and 72 of the spacers 55 and 57 and the grooves 68 and 73 of the bases 54 and 56. As shown in (B),
By providing an inclined portion in the cross-sectional portion of the protrusion 77 and the groove 78 so that the protrusion 77 and the groove 78 do not contact at the bottom portion 78a, contact at the inclined portion 78b, and not at the side wall portion 78c, The dimensional accuracy of the combination can be improved.

FIG. 13 shows a construction related to the attachment / detachment of the rotary grindstone 80. FIG. 13 (A) is a longitudinal sectional view, and FIG. 13 (B) is an end view of the wheel center. Grindstone body 81
Is sandwiched between the wheel center 82 and the flange 83. A bolt 84 is tightened between the wheel center 82 and the flange 83. On the surface of the flange 83,
The annular groove 85 is formed, and the rotational balance can be adjusted while changing the position of the balance weight 86.
A mounting hole 87 is formed in the center of the wheel center 82,
The grindstone shaft 88 is inserted. The grindstone shaft 88 is formed with a taper whose outer diameter decreases as it approaches the tip, and a threaded portion 89 is formed at the tip. The nut member 90 is screwed into the screw portion 89. The nut member 90 is a collar 91.
The grindstone shaft 88 and the wheel center 82 are connected via the. Since the collar 91 can be divided in the circumferential direction,
If the nut member 90 is slightly loosened, it can be opened in the radial direction and easily removed. The inner diameter d10 of the mounting hole 87 is larger than the outer diameter d20 of the nut member 90. The outer diameter d30 of the collar 91 is larger than the outer diameter d20 of the nut member 90, and the inner diameter d31 of the collar 91 is the outer diameter d of the nut member 90.
Less than 20. Therefore, if the collar 91 is removed, the grindstone shaft 88 can be pulled out from the mounting hole 87 of the wheel center 82 without completely removing the nut member 90 from the grindstone shaft 88.

A pulling jig 100 can be used in order to more easily pull the grindstone shaft 88 from the wheel center 82. The extraction jig 100 includes a jack 101 and a bolt 102. A claw portion 103 is provided at the tip of the jack 101, and is hooked by a hooking portion 105 of a groove 104 formed around the end surface of the wheel center 82. In this state, by rotating the head of the bolt 102 and pressing the tip of the grindstone shaft 88, the grindstone shaft 88 is moved to the wheel center 8.
It can be easily pulled out from the second mounting hole 87.

As shown in FIG. 13B, the hooking portion 105 formed on the end face of the wheel center 82 has a jack 10
It has a notch portion 106 corresponding to one claw portion 103. When the claw portion 103 is at the position of the cutout portion 106, the jack 101 is attachable to and detachable from the wheel center 82 in the axial direction of the grindstone shaft 88. When the jack 101 is pressed and twisted with respect to the wheel center 82, the claw portion 103 is in a state of being latched by the latching portion 105.

FIG. 14 shows the shape of the nut member 90.
(A) is a front view and (B) is a side sectional view. A threaded portion 110 is provided on the inner peripheral surface of the nut member 90, and a cutout portion 111 is formed on the outer peripheral portion.

FIG. 15 shows the structure of the collar 91. The color 91 is divided into two by the divided pieces 112 and 113,
They are connected by a connecting piece 114 and pins 115 and 116. By opening the space between the divided pieces 112 and 113, the nut member 90 is moved to the thread portion 89 of the grindstone shaft 88.
It can be easily attached and detached even when it is attached to the.

FIG. 16 shows the construction of the drawing jig 100. (A) is a front view and (B) is a side sectional view. Claw 1
03 is formed at the tip of the leg 117. The pull-out jig 100 as described above can be used while being attached to the tip of the grindstone shaft 88, or may be mounted and used only when the rotary grindstone is removed.

FIG. 17 shows that the nut member 90 is tightened,
The structure of the spanner 120 used for loosening or loosening is shown. (A) is a front view and (B) is a right side view. The spanner 120 includes a head 121 and a handle 122.
And are provided. A protrusion 123 that fits into the cutout portion 111 of the nut member 90 is formed on the inner peripheral side of the head 121. In the present embodiment, since the whetstone shaft 88 and the rotary whetstone can be attached and detached without completely removing the nut member 90 from the whetstone shaft 88, quick work is possible. The nut member 90 may have another shape such as a hexagon, and a spanner having a corresponding shape may be used.

[0037]

As described above, according to the present invention, the receiving member is configured to include the contact member and the base member, and only the contact member is replaced according to the diameter of the roll. The part is lightened, and the work for replacing the received money can be performed safely and quickly. As a result, it is possible to shorten the stop time during which the roll is not ground, improve the operation rate of the roll grinder, and improve the efficiency and productivity.

Further, according to the present invention, since the base member can be divided, it can be easily adapted to rolls having a wide range of diameters.

Further, according to the present invention, the collar which can be divided in the circumferential direction can be removed only by loosening the nut member, and the grindstone shaft can be easily pulled out from the mounting hole of the rotary grindstone with the nut member attached. This reduces the downtime without grinding the rolls and improves the roll grinder operating rate.
It can improve efficiency and productivity.

Further, according to the present invention, in order to separate the grindstone shaft and the rotary grindstone, it is possible to use a drawing jig hooked on the end surface of the rotary grindstone. By using a drawing jig,
The mounting hole of the rotary whetstone and the whetstone shaft can be separated without hitting with a wood hammer, etc., improving work safety,
Productivity and workability can also be improved.

[Brief description of drawings]

FIG. 1 is a simplified side view showing a configuration related to a cradle according to an embodiment of the present invention.

FIG. 2 is a simplified side view showing a relationship between a roll and a receiving money in the embodiment of FIG.

FIG. 3 is a simplified side view showing the relationship between rolls and receiving money in the embodiment of FIG.

FIG. 4 is a simplified side view showing the relationship between rolls and receiving money in the embodiment of FIG.

5A and 5B are a front view, a right side view and a plan view showing the shape of the contact member in the embodiment of FIG.

6A and 6B are a front view, a right side view and a plan view showing the shape of the contact member in the embodiment of FIG.

7A and 7B are a front view, a right side view and a plan view showing the shape of the contact member in the embodiment of FIG.

8A and 8B are a front view, a right side view and a plan view showing a shape of a contact member in the embodiment of FIG.

9A and 9B are a front view, a right side view, and a plan view showing the shape of the contact member in the embodiment of FIG.

10A and 10B are a front view, a right side view, and a plan view showing the shape of the contact member in the embodiment of FIG.

11A and 11B are a side view and a plan view showing the configuration of the base member in the embodiment of FIG.

FIG. 12 is a partial cross-sectional view showing a configuration of a combined portion formed by a protrusion and a groove and an improved configuration thereof in the embodiment of FIG.

13A and 13B are a sectional view and an end view showing a mounting structure of a rotary grindstone to a grindstone shaft in the embodiment of FIG.

14 is a front view and a side sectional view of a nut member used in the configuration of FIG.

FIG. 15 is a front view of a collar used in the configuration of FIG.

16A and 16B are a front view and a side sectional view of a drawing jig used in the configuration of FIG.

FIG. 17 is a front view and a right side view of a spanner for a nut member used in the configuration of FIG.

FIG. 18 is a plan view of a conventional roll grinder.

FIG. 19 is a front view showing a state in which a roll to be ground is mounted on a conventional roll grinder.

FIG. 20 is a side view showing a state in which a roll to be ground is supported by a pedestal of a conventional roll grinder.

FIG. 21 is a cross-sectional view showing a state in which a conventional rotary grindstone and a grindstone shaft are combined.

[Explanation of symbols]

 41 pedestal 43a, 43b, 43c Roll 44a, 44b, 44c Receiving 45a, 45b, 45c Receiving 50, 52 Base member 51a, 51b, 51c Contact member 53a, 53b, 53c Contact member 54, 56 Base 55, 57 Spacer 60 Babbitt metal part 61 Main body 62, 67, 72, 76 Protrusions 66, 68, 71, 73, 77 Groove 81 Grindstone main body 82 Wheel center 83 Flange 87 Mounting hole 88 Grindstone shaft 89 Screw part 90 Nut member 91 Color 100 Extraction Jig 101 Jack 102 Bolt 103 Claw 105 Locking portion 106 Notch 112, 113 Split piece 114 Coupling piece 120 Spanner

Claims (4)

[Claims] 1. A roll grinder in which a roll is centered at both ends in the axial direction to be rotationally driven, and a receiver is partially brought into contact with and supported by an outer peripheral surface of the roll and is ground by a rotating grindstone, wherein the receiver is A roll including: a contact member having a bearing material formed in a portion in contact with the outer peripheral surface of the roll; and a base member having the contact member detachably attached to the tip and the base end fixed to a roll grinder. Grinder. 2. The roll grinder according to claim 1, wherein the base member is divisible. 3. A roll grinder in which a roll is centered at both ends in the axial direction and rotationally driven to grind with a rotating grindstone while supporting a support partly in contact with an outer peripheral surface of the roll. A mounting hole into which a grindstone shaft for rotation driving is inserted is formed in the central portion, and the mounting hole is screwed into the tip of the grindstone shaft in a state of being fitted into the central shaft of the rotating grindstone. The nut member is smaller than the inner diameter, and is interposed between the nut member and the rotary grindstone, the outer diameter is larger than the inner diameter of the mounting hole, the inner diameter is smaller than the outer diameter of the nut member, and can be divided in the circumferential direction. A roll grinder including a collar and a collar. 4. The grindstone shaft is pressed around the mounting hole of the rotary grindstone in the axial direction in a state where the nut member is loosely screwed to the tip of the grindstone shaft and the collar is removed radially outward. 4. The roll grinding machine according to claim 3, further comprising a hooking portion for hooking a pulling jig for pulling out the rotary grinding stone from the rotary grindstone.