WO2001060566A1

WO2001060566A1 - Roll polishing device and roll polishing method

Info

Publication number: WO2001060566A1
Application number: PCT/JP2001/001172
Authority: WO
Inventors: Yukio Akimoto; Toru Otowa; Haruo Noguti; Nobuyosi Fujioka; Hidesi Kuninori
Original assignee: Nippon Paper Industries Co., Ltd.
Priority date: 2000-02-17
Filing date: 2001-02-19
Publication date: 2001-08-23
Also published as: JP2005230915A

Abstract

A roll polishing device capable of polishing a roll installed in a paper making equipment at an operating position, wherein a guide rail (10) extending in parallel with the rotating shaft of the roll is provided over the roll (R), a running support body (6) is suspended from the guide rail (10), the running support body (6) is allowed to run along the guide rail (10), a polishing machine (G) is suspended from the running support body (6), the polishing machine (G) comprises a polishing stone (B) and is movable in vertical direction, and an actuator (3) is installed between the running support body (6) and the polishing machine (G), whereby the polishing stone (B) is allowed to be in contact with the roll (R) with a desired pressuring force by operating the actuator (3).

Description

Description '' Roll polishing apparatus and method

Technical field

The present invention relates to an apparatus for polishing a hole installed in papermaking equipment, such as a roll in a coating apparatus, and a roll polishing method. For example, in a paper mill, after paper is made by a paper machine, a coating liquid containing a synthetic resin and a pigment is coated on the base paper in order to improve the printability of the paper. There are various types of coating methods, such as a bladeco one-time method, a mouth-one-timer one-time method, a force ten-flow coater method, and an air-knife method. The present invention relates to a polishing apparatus and a polishing method applicable to the polishing of rolls in papermaking equipment, such as paper and calendar rolls.

Background art

When coating on paper, for example, the paper is run along the backing roll of a blade, and the coating liquid is sprayed from the fountain onto the running paper surface, and the coating liquid excessively adhered to the paper surface is removed. Wipe with a blade and spread the coating liquid evenly on the paper surface. The surface of the backing roll is covered with rubber or synthetic resin, so there are relatively few problems during normal running of the paper.However, when an abnormal situation such as cutting of the paper occurs, The roll surface may be scratched or fine particles of the coating liquid may adhere to the roll surface.

In addition, even in normal operation, the coater and other papermaking equipment may wear out and adhere to the paper dust.

The paper coated with the coating liquid always travels in contact with the backing roll and presses the coating surface with a blade to evenly distribute the coating liquid on the paper surface. If rolls enter or fine particles of the coating liquid adhere to the rolls and cause irregularities on the roll surface, uneven coating will occur and the quality of the product will deteriorate. Normally, as shown in Fig. 1 or Fig. 4, the roll surface is always washed off with flow-clean water to prevent contamination of the roll surface. In the case of blemishes, stop the coater temporarily and grind the scratches manually to smooth out In addition, the roll surface was cleaned.

As a result, not only was it labor-intensive, but it took a long time to recover, and the operating efficiency of the coating machine was reduced. If the roll surface has relatively large scratches that cannot be repaired manually, the roll is removed from the coating machine and repaired with a roll grinder. The same applies when the roll surface is contaminated.

Disclosure of the invention

According to the present invention,

A method of polishing a roll provided in a papermaking facility,

Positioning a polishing machine having a polishing wheel close to a roll to be polished in a normal operating position;

Contacting the polishing wheel with the roll at a desired pressure,

Polishing the grinding wheel while rotating the roll,

Roll polishing method comprising:

The roll polishing method according to claim 1, wherein the roll is polished with the whetstone while rotating the roll in a normal operation state.

The nozzle may be polished with the whetstone while rotating in a normal operating state.

The step of bringing the polishing wheel into contact with the roll at a desired pressure is performed by two actuators mounted on the polishing machine, and by operating one of the actuators, the polishing machine is operated. The grinding wheel may be pressed against the roll at the desired pressure by operating the other factor by balancing the weight.

Alternatively, the step of bringing the polishing grindstone into contact with the roll with a desired pressing force is performed by a double-acting cylinder piston type actuator attached to the polishing machine, and by pressurizing the piston rod side. The weight of the polishing machine may be balanced, and the polishing wheel may be pressed against the roll at the desired pressure by pressing the piston side. According to the present invention,

A polishing apparatus for polishing a roll provided in a papermaking facility,

A guide rail provided above the roll and extending parallel to the rotation axis of the roll;

A traveling support suspended by the guide rail and capable of traveling along the guide rail; and a polishing machine suspended by the traveling support and movable in a vertical direction, a polishing machine having a polishing grindstone;

An actuator provided between the traveling support and the polishing machine to bring the polishing wheel into contact with the roll at a desired pressure;

There is also provided a roll polishing apparatus comprising:

Two of the actuators are provided, one of the actuators is operable to balance the weight of the polishing machine, and the other of the actuator is capable of applying the polishing wheel at the desired pressure. It may be operable to press against a roll.

Alternatively, the actuating unit is a double-acting cylinder piston type actuating unit, the piston rod side is pressurized to balance the weight of the polishing machine, and the piston side is pressurized to achieve the desired pressing force. The grinding wheel may be pressed against the roll.

An elevating arm for moving the polishing machine in the vertical direction may be provided between the traveling support and the polishing machine.

The traveling support may include a rotating support that is rotatable in a horizontal direction.

The polishing wheel can be rotated by a hydraulic motor.

The polishing grindstone can be a polishing grindstone reinforced with fibers such as synthetic resin fibers, glass fibers, and carbon fibers.

A wiper for preventing the lubricating liquid supplied for polishing from scattering toward the paper on the traveling path may be provided.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is an explanatory front view of a polishing apparatus according to the present invention.

FIG. 2 is an explanatory view of a blade with the polishing apparatus of the present invention installed.

FIG. 3 is an explanatory view of a blade cop with the polishing apparatus of the present invention.

Fig. 4 is a partially enlarged view of Fig. 1.

Figure 5 shows a detailed view of the event.

Figure 6 is an explanatory perspective view of the grinding wheel.

Fig. 7 is a perspective view of a grinding wheel.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is an explanatory front view of a polishing apparatus according to the present invention, and FIG. 2 shows a roll polishing apparatus according to the present invention applied to a blade roller. In the figure, reference numeral 10 denotes a horizontal member for suspending the polishing apparatus, and the horizontal member 10 includes a frame for the co., Or a structural material of a building for accommodating the co. Mounted and supported on a solid fixture. 9 is a guide rail, which is attached to the horizontal member. A slide rail 6a fitted to the guide rail 9 is attached to the traveling support 6, and the traveling support 6 is suspended from the guide rail 9 via the slide rail 6a. Then, the traveling support 6 travels in the axial direction of the backing roll R by the rotation output of the thermopowder 8 attached to the traveling support 6. That is, a gear 8 a that rotates in conjunction with the output shaft of the servomotor 8 is a rack-shaped toothed rail 11 fixed to the horizontal member 10 and extending in parallel with the guide rail 9. Accordingly, the traveling support 7 travels with the rotation output of the servomotor 8.

The guide rail 9 is longer than the axis of the packing roll R, and is usually provided at one end so that the polishing machine G can be retracted from above the backing opening R when the coating machine is operating or the grinding wheel B is replaced. Is extended to the evacuation area on the left or right side of the coating machine. In FIGS. 1 to 3 of the above embodiment, a rotatable support 4 that is rotatable in the horizontal direction is added to the lower part of the traveling support 6. The elevating arm 2 is attached to the traveling support 6 via the rotary support 4. When the target equipment is a large-sized mechanical device, when the grinding wheel B is mounted or replaced, the rotating support 4 is rotated to make the polishing machine G mounted on the lifting arm 2 relatively wide. As a result, it is easy to install or replace the grinding wheel B toward the operation side with a work space. Can be. For example, in Fig. 2, when the paper is stopped and the grinding wheel is replaced, if the left side in the figure is the operation side where the operator puts in, the rotating support 4 is attached to the rotating support 4 as shown in Fig. 3. The grinder G can be moved to the operation side by rotating it by 80 degrees. When the present invention is applied to a roll of a small mechanical device, the rotating support 4 is not always necessary, and the lifting arm 2 may be directly attached to the traveling support 6.

As described above, if the rotating support 4 is interposed between the traveling support 6 and the elevating arm 2, the polishing machine G is rotated in the horizontal direction, and the position of the polishing machine G is changed to a position where work is easy. It is possible to replace the grindstone without moving the grinder G to the evacuation area described above. For example, the traveling support 6 may be moved toward the operation side of the machine at the left end or the right end of the guide rail 9, the rotating support 4 may be rotated 90 degrees, and the polishing machine G may be brought close to the operator of the machine. Therefore, it is not always necessary to provide a retreat place for the polisher G by extending the guide rails described above.

The polishing wheel B rotatably mounted on the polishing machine G is rotated by the rotation of the hydraulic motor 1. The polishing machine G is mounted on the lifting arm 2 so as to be pressurizable in the downward direction. The polishing machine G can be raised and lowered and pressurized on the surface of the backing roll R by the operation of the hydraulic or pneumatic actuator 3. That is, the operation of Actuator 3 allows polishing wheel B to contact or separate from backing roll R, and also allows polishing wheel B to be pressed against backing roll R with a predetermined pressing force. The actuator 3 is typically a piston cylinder device such as an air cylinder, and the pressing force is adjusted by an air pressure adjusting valve (not shown) connected to the air cylinder.

The elevating arm 2 is attached to the rotary support 4 via a pivot pin P so as to be freely rotatable in the vertical direction, and backs the polishing whetstone B by expansion and contraction of a hydraulic or pneumatic actuator 5 in the form of a piston cylinder device. It can be lowered to the close distance of Roll R. The grinding wheel B can be pressed against the backing roll R by the operation of the actuator 5. However, it is difficult to precisely control the pressure applied to the backing roll R with the actuator 5. To lower the raising and lowering arm 2 until the grinding wheel B reaches the close distance of the backing roll R, and stop at that position, and control the pressing force by a hydraulic or pneumatic actuator 3. Do it. In addition, the actuator 5 is used to raise the elevating arm 2 as necessary, such as when replacing the grinding wheel B. The rotary support 4 is suspended by a shaft that is rotatable in the horizontal direction with respect to the traveling support 6, and the rotary support 4 is horizontally driven by the power of the hydraulic motor 7 as necessary, for example, when replacing the grinding wheel B. As described above, the lifting arm 2 can be turned to the operation side.

Next, a method of using the above-described polishing apparatus of the present invention will be described. First, the hydraulic motor 7 is rotated, and the lifting arm 2 is directed toward the operation side, and the grinding wheel B is mounted or replaced. When the mounting or replacement of the grinding wheel B is completed, the rotary support 4 is rotated by the hydraulic motor 7 to move the grinding wheel B directly above the backing roll R to be polished in the normal operation position.

Next, the actuator 5 is operated to lower the elevating arm 2 so that the grinding wheel B is close to the backing roll R, and the tip of the grinding wheel B is close to the peripheral surface of the backing roll R. Stop. Normally, when the tip of the grinding wheel B reaches the close distance to the peripheral surface of the backing roll R, the piston rod of the actuator 5 is designed to extend, so the operation of stopping the lifting arm 2 is unnecessary. Subsequently, while rotating the polishing wheel B of the polishing machine G by the hydraulic motor 1, the end cutter 3 is operated to bring the polishing wheel B into contact with the peripheral surface of the backing roll R. Then, while flowing a lubricating liquid between the backing roll R and the polishing whetstone B as needed, observe the polishing state, and adjust the pressing force of the actuator 3.

The polishing operation by the contact between the backing roll R and the grinding wheel B can be performed while rotating the packing roll R in a normal operation state.

Hydraulic or pneumatic actuator 3 is composed of two actuators 3a and 3b as shown in Fig. 5. Pressing the grinding wheel B against the roll R with a downward output of 3 b overnight makes it easier to control the pressing pressure. That is, if the grinder G is lifted by the actuator 3a, and the weight of the grinder G and the upward output of the actuator 3a are balanced, the grinding machine on the other actuator 3b is balanced. Since the weight of G is zero, when pressing the grinding wheel B onto the surface of the roll R, only the air pressure or oil pressure of the actuator 3b needs to be controlled. Cheap.

In addition, the above actuator 3 is a double-acting piston-cylinder device that can separately control the internal pressure on the piston side (pressurizing side) and the internal pressure on the piston rod side (discharge side). Thus, it is also possible to obtain a pressing force excluding the influence of the weight of the polishing machine G. In this case, the output on the piston rod side (discharge side) is an output in the direction of shortening the piston cylinder device. Therefore, first, pressurized air or oil is introduced into the piston rod side, and the upward obtained Balance the weight of the grinding machine G with the output of the grinding machine. Subsequently, pressurized air or pressurized oil is introduced to the piston side while maintaining the internal pressure on the piston rod side (discharge side) at the constant pressure in the balance state by a pressure regulating valve. The output on the piston side (pressure side) is the output in the direction to extend the piston cylinder device. Therefore, the internal cross-sectional area of the cylinder on the piston side and the internal cross-sectional area of the cylinder on the piston rod side are S and S ', respectively, the internal pressure of the former is V, the internal pressure of the latter is V', and S'XV '= polishing If V 'is controlled to a constant pressure so that the machine weight is attained and the piston side is pressurized in this state, the pressing force of the polishing wheel applied to the roll R is SXV. Since V 'is a constant, it can be kept constant at all times by the pressure regulating valve. Accordingly, since the pressure applied to the roll is directly proportional to the internal pressure V on the piston side, the pressure can be adjusted without being affected by the weight of the polishing machine G by adjusting the value of V with the pressure adjusting valve. In this case, the number of hydraulic or pneumatic actuators 3 in the form of a double-acting piston cylinder device may be one, but as shown in FIG. 5, the use of two is more stable.

Since the pressure applied to the roll R usually does not require a large pressure, it is preferable to use a pneumatic cylinder instead of a hydraulic pressure as the above-mentioned actuary.

If the grinding wheel is pressed against the roll with an extremely small pressing force, such as when removing contamination on the roll surface, it is difficult to control the pressing force finely unless the above method is used. That is, if the pressing force is equal to or greater than the weight of the grinder G, the actuator 3 may be operated in a direction to lower the hydraulic motor 1 and the grinding wheel B, but the pressing force may be larger than the weight of the polishing machine G. If it is necessary to reduce it, raise the grinder G Since it is necessary to operate the factory, it is difficult to control the applied pressure. Therefore, it is desirable to pressurize the factory 3 with the balance of the weight of the polisher G, keeping the weight of the polisher G to be apparently zero.

When polishing the entire surface of the backing roll R, first rotate the rotary support 8 to move the traveling support 6 to the right end or left end of the backing roll R, and slowly rotate the backing roll R. Then, the surface of the backing hole R is polished while the traveling support body 6 is reciprocated several times in the axial direction of the backing hole R by means of the suction pad 8. When the polishing is completed, the polishing device G is retracted to the retreat place at one end of the backing roll, or the elevating arm 2 is raised, and the polishing wheel B is separated from the roll surface to stop the rotation of the polishing wheel B. When polishing not the whole roll but a part of the mouth, the traveling support 6 is moved to a predetermined position to be polished by the servomotor 8 and polished.

The traveling distance of the traveling support 6 can be controlled by the number of rotations of the traveling support 8, so that the traveling of the traveling support 6, the vertical movement of the lifting / lowering arm 2, the rotation of the rotating support 4, and the lubrication liquid 1 2 If it is possible to remotely control the movements of supply, actuation, etc. 3a, 3b, etc. It is possible.

In the above-described embodiment of the present invention, the hydraulic motor 1 and the hydraulic motor 7 are used for the rotary driving devices of the grinding wheel B and the rotary support 4, respectively, but a normal electric motor is used instead of the hydraulic motor. Can also be used. Further, it is preferable to use an air cylinder for raising and lowering and pressurizing the grinding wheel, and a hydraulic cylinder for raising and lowering the lifting arm. However, other lifting means such as a worm gear may be used as the above-mentioned actuator. .

When the apparatus of the present invention is applied to a mechanical device using a liquid, such as a roll of a coating machine, the scratches on the surface of the roll are polished and smoothed, and the residue of the coating liquid or the like adhering to the roll surface is removed. When removing or when regularly cleaning the roll surface with washing water such as warm water, the washing water such as coating liquid scatters and the polishing equipment stops functioning. Might be. Also, in order to perform the polishing work efficiently, the polishing wheel Since the lubricating liquid may be poured into the roll part, the lubricating liquid may scatter around. Therefore, when the apparatus of the present invention is used in a coating machine or the like, it is desirable to use a drive device that does not stop its function even when a coating liquid, some washing water or a lubricating liquid is applied. Therefore, in the above-described embodiment of the present invention, the polishing wheel B, which is easily affected by water or hot water, and the hydraulic drive unit that is resistant to contamination and water are used for the rotation driving device of the rotary support 4, and the polishing wheel B is used. The air cylinder is used for the actuator to move the lift arm 2 up and down, and the hydraulic cylinder is used for the actuator to move the lifting arm 2 up and down. In particular, it is desirable to use a hydraulic motor for the rotary drive of the grinding wheel B, since lubricating liquid and cleaning water are likely to be applied. As shown in Fig. 1 or Fig. 4, the lubricating liquid 12 described above is attached to the paper W in the running path during operation by attaching the wiper 13 to the grinder G so that the lubricating liquid does not scatter around. It can be prevented from scattering toward. The lubricating liquid that drips downward along the roll surface is blocked by the Flow Clinicator 15 and can be collected on both sides of the roll together with the flow-clean water, so that the roll can be polished while the coating machine is operating. be able to. That is, for example, even when the paper W is coated, the backing roll R can be polished as needed.

In addition, various grinding wheels can be selected according to the purpose. When the roll polishing apparatus of the present invention is applied to a relatively small mechanical device, a driving device other than a driving device for rotating a grinding wheel can be replaced with a manual device. It must be done manually, such as adjusting the pressing pressure. When removing contamination on the roll surface made of rubber or synthetic resin or repairing small scratches, for example, a polishing wheel reinforced with fibers shown in FIG. 6 or 7 is suitable as a polishing wheel. The polishing wheel shown in Fig. 6 is based on a cloth or non-woven fabric made of synthetic fibers such as nylon, polyester, or polyamide, or fibers such as carbon fiber glass fibers, and has a water-resistant surface such as epoxy resin or phenol resin on the surface of the base material. Using a thermosetting resin adhesive, a flap to which abrasive grains such as alumina oxide, silica sand, and carborundum are adhered is radially arranged on the outer peripheral surface of the cylindrical shaft of the grinding wheel, and the thermosetting adhesive is cured. And molded into a ring shape. The polishing wheel shown in Fig. 7 is based on a band-shaped cloth or non-woven fabric made of synthetic fibers such as nylon, polyester, polyamide, etc., or fibers such as carbon fiber glass fibers, and the surface of the substrate is made of a water-resistant material such as epoxy resin or phenol resin. Abrasives such as alumina oxide, silica sand, carborundum, etc. are adhered to the outer peripheral surface of a cylindrical grindstone using a thermosetting resin adhesive with an adhesive, and the above thermosetting adhesive is cured. It was molded into a ring.

ADVANTAGE OF THE INVENTION According to this invention, about the grinding | polishing of the roll of the machinery provided in the papermaking equipment, such as a coating machine, since it can grind | polish at an operation position, and also during operation, without removing a nozzle from a machinery. In addition, the downtime of machinery such as a coating machine can be reduced, and productivity can be increased.

When a rotating support is used, operations such as replacement of a grinding wheel can be facilitated.

In order to apply to a case where a cleaning liquid is used at the time of polishing, such as a coating machine, by using a hydraulic motor, it is possible to make the structure resistant to a cleaning liquid such as water.

The function of balancing the weight of the grinder and the function of pressing the grindstone against the roll surface with the desired pressing force during the operation of bringing the grinder into contact with the roll surface. It is possible to easily control the pressing force of the grindstone. In addition, this makes it possible to precisely control the pressing force that is smaller than the weight of the polisher. Polishing is performed with a predetermined pressing force according to the surface material of the small roll, and the degree of scratches and contamination. Can be prevented.

The grinding wheel of the present invention is suitable for removing contamination on the roll surface whose surface is made of rubber or synthetic resin or for repairing small scratches.

Claims

The scope of the claims

1. A method of polishing a roll provided in a papermaking facility,

Contacting the polishing wheel with the roll at a desired pressure,

Polishing the grinding wheel while rotating the roll,

Roll polishing method comprising:

2. The roll polishing method according to claim 1, wherein the polishing is performed with the whetstone while rotating the roll in a normal operation state.

3. The step of bringing the polishing wheel into contact with the roll at a desired pressing force is performed by two actuators mounted on the polishing machine, and one of the actuators is activated by operating one of the actuators. The roll according to claim 1, wherein the weight of the polishing machine is balanced, and the other grindstone is pressed against the roll at the desired pressure by activating the other actuator. Polishing method.

4. The step of bringing the grinding wheel into contact with the roll with a desired pressing force is performed by a double-acting cylinder piston type actuator attached to the polishing machine, and by pressurizing the piston rod side. The roll polishing according to claim 1 or 2, wherein the weight of the polishing machine is balanced, and the polishing grindstone is pressed against the needle with the desired pressing force by pressurizing a piston side. Method.

5. A polishing apparatus for polishing a roll provided in a papermaking facility, the guide rail being provided above the roll and extending parallel to a rotation axis of the roll;

An actuator provided between the traveling support and the polishing machine to bring the polishing wheel into contact with the roll at a desired pressure; A roll polishing apparatus comprising:

6. Two of the actuators are provided, one of which is operable to balance the weight of the polishing machine, and the other of which is capable of applying the desired pressure. The roll polishing apparatus according to claim 5, wherein the roll polishing apparatus is operable to press the polishing whetstone against the roll.

7. The actuator is a double-acting cylinder piston type actuator. The piston rod side is pressurized to balance the weight of the polishing machine, and the biston side is pressurized to achieve the desired pressing force. 6. The jaw polishing apparatus according to claim 5, wherein the apparatus is operable to press the polishing whetstone against the roll.

8. The roll polishing apparatus according to claim 5, wherein a lifting arm for performing the vertical movement of the polishing machine is provided between the traveling support and the polishing machine. .

9. The roll polishing apparatus according to claim 5, wherein the traveling support includes a rotatable support rotatable in a horizontal direction.

10. The roll polishing apparatus according to claim 5, wherein the polishing wheel is rotatable by a hydraulic motor.

11. The roll polishing apparatus according to claim 5, wherein the polishing grindstone is a polishing grindstone reinforced with fibers such as synthetic resin fibers, glass fibers, and carbon fibers.

12. The wiper according to any one of claims 5 to 11, characterized in that a wiper is provided to prevent the lubricating liquid supplied for polishing from scattering toward the paper on the travel path. A roll polishing apparatus as described in the above.