JP2012171031A - Roll polishing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll polishing apparatus capable of automatically polishing a roll without impairing workability by an operator on the entrance side or the exit side of the roll.SOLUTION: An upper polishing part (abrasive holder 9 and abrasive 10) is connected to the lower end of a rod 7, is arranged in separation from an upper roll 31 in the upper part of the upper roll 31 when a cylinder 6 is depressurized, and is moved downward with the downward movement of the rod 7 to abut on the upper roll 31 when the cylinder 6 is pressurized. Also, a lower polishing part (abrasive holder 16 and abrasive 17) is connected to the cylinder 6, is arranged in separation from a lower roll 32 in the lower part of the lower roll 32 when the cylinder 6 is depressurized, and is moved upward with the upward movement of the cylinder 6 by a repulsive force that is generated by pressurized contact with the upper roll 31 of the upper polishing part to abut on the lower roll 32 when the cylinder 6 is pressurized.

Description

  The present invention relates to a roll polishing apparatus for automatically polishing a roll used for rolling and straightening a steel sheet.

A roll used for rolling and straightening a steel sheet is accompanied by wrinkles and foreign matters attached to the outer peripheral surface of the roll. Since these are transferred to the steel sheet during rolling or straightening and cause surface defects of the steel sheet, the roll needs to be polished appropriately. It is desirable that this roll polishing operation can be performed without the operator directly touching the roll from the viewpoint of ensuring safety.
Therefore, as an automatic roll polishing machine that performs automatic polishing of rolls, a pedestal is installed on the entry side or exit side of the roll rolling mill, and the polishing rod attached on the pedestal is pressed between the upper roll and the lower roll to drive There is one that polishes the upper roll and the lower roll at the same time by reciprocating the motor by normal rotation and reverse rotation (for example, see Patent Document 1).

  Also, a polishing device that can reciprocate on the guide rail installed on the base of the polishing machine is brought into contact with the bearing inner ring of the rolling roll that is the object to be polished, and the polishing apparatus is automatically operated while rotating the bearing inner ring at a constant speed. By reciprocating, the roll polishing may be performed without the operator touching the hand directly (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 10-80848 JP-A-10-151551

However, in the conventional apparatus described in each of the above patent documents, it is necessary to dispose the pedestal of the polishing machine on the entry side or the exit side of the roll, so that the operator does some work on the entry side or the exit side of the roll. When performing, there is a possibility that the pedestal of the polishing machine becomes an obstacle to deteriorate the workability.
Then, this invention makes it a subject to provide the roll grinding | polishing apparatus which can perform the grinding | polishing of a roll automatically, without impairing the workability | operativity by the operator in the entrance side and exit side of a roll.

  In order to solve the above problems, a roll polishing apparatus according to the present invention is a roll polishing apparatus that polishes a pair of upper and lower rolls, and is arranged vertically downward above an upper roll, and moves up and down with respect to the upper roll. A cylinder that can move up and down with respect to the cylinder in response to pressure fluctuations in the cylinder, an upper polishing portion that is connected to the lower end of the rod and that can polish the outer peripheral surface of the upper roll, A lower polishing portion connected to a cylinder and capable of polishing the outer peripheral surface of the lower roll, and the upper polishing portion is disposed above the upper roll and separated from the upper roll when the cylinder is depressurized. When the cylinder is pressurized, the rod moves downward as the rod moves downward and contacts the upper surface of the upper roll. The lower polishing portion is configured to move the lower roller when the cylinder is depressurized. The upper polishing portion and the upper roll are brought into contact with each other when the cylinder is pressurized, and the cylinder is moved upward by the repulsive force that the cylinder receives from the upper roll. It is characterized in that it is configured to move upward along with the movement of and to come into contact with the lower surface of the lower roll.

  In this way, by pressing the cylinder and moving the rod downward, the upper polishing part connected to the lower end of the rod is moved downward and brought into contact with the upper roll, so the upper roll is polished by the upper polishing part. can do. At this time, since the cylinder is configured to be movable up and down with respect to the upper roll, the cylinder can be moved upward by an upward repulsive force generated by the upper polishing portion being pressed against the upper roll. Therefore, as the cylinder moves upward, the lower polishing part connected to the cylinder can be moved upward and brought into contact with the lower roll, so the lower roll is polished by the lower polishing part. Can do.

  As described above, the upper and lower rolls can be simultaneously polished by operating the upper polishing section and the lower polishing section with one cylinder. Further, since the upper polishing portion and the lower polishing portion are arranged above and below the upper and lower rolls, respectively, it is not necessary to arrange a polishing machine base or the like on the entry side or the exit side of the roll. Therefore, even when the worker performs some work on the entry side or the exit side, the roll polishing apparatus does not interfere with the work.

  In the above, the upper polishing portion and the lower polishing portion each include an abrasive and an abrasive holder that holds the abrasive, and the longitudinal direction of the abrasive holder is the upper roll and the lower roll. Arranged so as to coincide with the axial direction, the abrasive is configured to be detachable from the longitudinal direction of the abrasive holder with respect to the abrasive holder, and the abrasive holder is a member to which the abrasive holder is connected. In contrast, it is configured to be rotatable at least 90 ° about a vertical axis.

  Thus, when the abrasive is replaced, the abrasive holder is rotated by 90 ° with respect to the connecting member, and the abrasive is removed with the longitudinal direction of the abrasive holder aligned with the roll axis direction (rolling direction). Is possible. Therefore, when there are housings or the like on both sides in the longitudinal direction of the abrasive holder and it is difficult to replace the abrasive from the axial direction of the roll, the abrasive can be replaced from the rolling direction as described above.

Further, in the above, each of the upper polishing portion and the lower polishing portion includes an abrasive and an abrasive holder for holding the abrasive, and the abrasive holder is attached to and detached from a member to which the abrasive is connected. It is configured to be possible.
Accordingly, when it is difficult to replace the abrasive in a state where the abrasive holder is connected to the connecting member, the abrasive holder can be removed from the connecting member and the abrasive can be replaced. Further, since the abrasive holder can be detached from the connecting member, the abrasive holder can be replaced.

ADVANTAGE OF THE INVENTION According to this invention, a roll outer peripheral surface can be grind | polished and foreign material removal can be performed safely and simply, without an operator touching a roll directly at the time of roll grinding | polishing operation | work. In addition, since the upper polishing section and the lower polishing section are operated by a single cylinder disposed above the upper roll, apparatus components can be reduced, and space can be saved.
Furthermore, since it is not necessary to provide a polishing device pedestal or the like on the entry side and the exit side of the roll, the polishing apparatus does not interfere with the work even when the operator performs work on the entry side or the exit side. There is no loss of sex.

It is a front view which shows schematic structure of the roll grinding | polishing apparatus which concerns on this invention. It is a side view showing a schematic structure of a roll polisher concerning the present invention. It is a figure which shows an example of an abrasives holder and an abrasive. It is a figure which shows operation | movement of this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Constitution)
FIG. 1 is a front view (sectional view) showing a schematic configuration of a roll polishing apparatus according to the present invention, and FIG. 2 is a side view showing a schematic configuration of the roll polishing apparatus according to the present invention.
In the figure, reference numeral 1 denotes a roll polishing apparatus, and reference numeral 30 denotes a rolling mill. The rolling mill 30 includes a pair of upper and lower upper rolls 31 and a lower roll 32, and the roll polishing apparatus 1 performs polishing of the outer peripheral surfaces of the upper roll 31 and the lower roll 32 and removing foreign substances.

The roll polishing apparatus 1 includes a support column 3 extending in the vertical direction. The column 3 is inserted into the column support pipe 4, and its upper and lower ends are fixed to the mounting plates 33 and 34 of the rolling mill 30 by the nut 2, respectively. It is assumed that the column support pipe 4 is slidably fitted to the column 3.
A horizontal mounting plate 5 is fixed to the upper portion of the column support pipe 4, and a lower portion of a hydraulic or pneumatic cylinder 6 is fixed to the upper surface of the mounting plate 5. A rod 7 is fixed to a piston (not shown) in the cylinder 6, and this rod 7 extends downward from the lower portion of the cylinder 6 while being inserted into a rod insertion hole 5 a formed in the mounting plate 5. Yes.

That is, the cylinder 6 is arranged vertically downward. In addition, the cylinder 6 has a central axis of the rod 7 that coincides or substantially coincides with the center positions of the upper roll 31 and the lower roll 32 in the front view shown in FIG. 1 and in the side view shown in FIG. The upper roll 31 and the lower roll 32 are installed above the upper roll 31 so as to coincide with or substantially coincide with the center position in the width direction.
The rod insertion hole 5a is designed to be larger than the cross-sectional shape of the rod 7 in the axial direction. Then, when the hydraulic pressure or pneumatic pressure is supplied to the cylinder 6 from a pressure generation source (not shown) and the cylinder 6 is pressurized, the rod 7 is configured to move downward.

  A holder mounting portion 8 formed with a male screw is fixed to the lower end portion of the rod 7. An abrasive 10 for polishing the upper roll 31 on the holder mounting portion 8 and an abrasive holder for holding the abrasive 10. 9 is connected to the upper polishing portion. Here, the upper abrasive part is connected to the holder attaching part 8 by screwing the abrasive holder 9 into the holder attaching part 8. At this time, the abrasive holder 9 is mounted on the holder mounting portion 8 so that the longitudinal direction thereof is parallel to the axial direction of the upper roll 31.

  The abrasive holder 9 is, for example, a U-shaped member having an opening disposed downward, and the abrasive 10 is detachable from the opening. Further, on the upper surface of the abrasive holder 9, a female screw that is screwed with the male screw of the holder mounting portion 8 is formed. That is, the abrasive holder 9 is detachably connected to the rod 7. For this reason, by removing the abrasive holder 9 from the rod 7, it is possible to replace the abrasive 10.

Generally, since there are housings of the rolling mill 30 main body on both sides in the longitudinal direction (axial direction of the upper roll 31) of the abrasive holder 9 when mounted on the rod 7, the removal of the abrasive holder 9 from the rod 7 is in the rolling direction. (From the direction of the axis of the upper roll 31)
Here, a case has been described in which a method of removing the abrasive holder 9 from the rod 7 and exchanging the abrasive 10 is adopted, that is, a so-called cartridge method, but the abrasive holder 9 is in relation to the rod 7. Therefore, it is possible to adopt a method in which the abrasive 10 is rotated 90 ° with the abrasive holder 9 mounted on the rod 7 and the abrasive 10 is replaced from the rolling direction.

  In this case, the abrasive holder 9 and the abrasive 10 have, for example, the shapes shown in FIG. That is, as the abrasive 10, for example, a material in which abrasive paper is wound around a columnar rubber is employed. The abrasive 10 is mounted on an abrasive mounting member 10a that can be fitted in the opening of the abrasive holder 9 having a U-shaped cross section from the longitudinal direction. Here, the abrasive mounting member 10a is a U-shaped member made of, for example, metal, and a guide portion 10b that can be fitted to the groove 9a formed in the abrasive holder 9 is externally provided on the upper surface portion thereof. It is formed in the direction. The opening diameter of the abrasive mounting member 10 a is set smaller than the diameter of the abrasive 10. That is, the abrasive 10 is fixed to the abrasive mounting member 10a by being pushed into the opening of the abrasive mounting member 10a from below. With such a configuration, the abrasive 10 can be replaced by removing the abrasive mounting member 10a from the longitudinal direction of the abrasive holder 9 while the abrasive holder 9 is mounted on the rod 7.

Returning to FIGS. 1 and 2, a rectangular holder insertion hole 34 a is formed at the center of the mounting plate 34. The holder insertion hole 34a is designed to be larger than the horizontal sectional shape of the abrasive holder 9, and the abrasive holder 9 holding the abrasive 10 can be inserted into the holder insertion hole 34a.
Further, the upper end portion of the guide rod 12 is fixed to the end portion of the mounting plate 5 by a nut 11. The lower end portion of the guide rod 12 is fixed to the mounting plate 14 by a nut 13. Further, one end of the arm 15 is fixed to the mounting plate 14, and the other end of the arm 15 is constituted by an abrasive 17 for polishing the lower roll 32 and an abrasive holder 16 for holding the abrasive 17. The lower polishing part is connected. Here, the lower polishing portion is connected to the other end of the arm 15 by fixing the abrasive holder 16 to the other end of the arm 15. The abrasive holder 16 is, for example, a U-shaped member having an opening disposed substantially upward, and the abrasive 17 can be inserted through the opening.

  With such a configuration, when the cylinder 6 is depressurized, the lower end portion of the support column support pipe 4 comes into contact with the upper surface of the mounting plate 34, and the abrasive holder 16 and the abrasive 17 are positioned at the lowest position. Further, when the cylinder 6 is depressurized, since the rod 7 is moved to the uppermost position, the abrasive holder 9 and the abrasive 10 are positioned at the uppermost position. At this time, the abrasive 10 is separated from the upper surface of the upper roll 31, and the abrasive 17 is separated from the lower surface of the lower roll 32.

  On the other hand, when the cylinder 6 is pressurized, the abrasive holder 9 and the abrasive 10 move downward as the rod 7 moves downward, and the lower surface of the abrasive 10 contacts the upper surface of the upper roll 31. Further, when the cylinder 6 is pressurized, the cylinder 6 moves upward due to the repulsive force generated by the pressure contact between the abrasive 10 and the upper roll 31, so that the abrasive holder 16 and the abrasive 17 move upward of the cylinder 6. Accordingly, the upper surface of the abrasive 17 comes into contact with the lower surface of the lower roll 32.

(Operation)
Next, the operation of this embodiment will be described with reference to FIG.
When the operator performs a predetermined operation (such as turning on the start lever) to start the polishing operation by the roll polishing machine 1, pressure is supplied from the pressure generation source into the cylinder 6, and the rod 7 of the cylinder 6 is moved downward. Moving. Then, as the rod 7 moves, the holder mounting portion 8, the abrasive holder 9 and the abrasive 10 connected to the lower end portion of the rod 7 move downward as indicated by an arrow A in FIG. . At this time, the lower surface of the abrasive 10 contacts the upper surface of the upper roll 31. As a result, the upper roll 31 is polished by the abrasive 10.

  In this state, when the pressure supply from the pressure generation source into the cylinder 6 is continued, the upward repulsive force generated by the pressure contact between the abrasive 10 and the upper roll 31 acts on the cylinder 6 via the rod 7. . Since the cylinder 6 is guided by the column support pipe 4 and can move up and down, the cylinder 6 moves upward as indicated by an arrow B in FIG.

  The mounting plate 5 is fixed to the lower part of the cylinder 6, and the guide rod 12, the mounting plate 14, and the arm 15 are fixed to the mounting plate 5. The rod 12, the mounting plate 14, and the arm 15 also move upward. Therefore, the abrasive holder 16 and the abrasive 17 fixed to the arm 15 also move upward as indicated by an arrow C in FIG. At this time, the upper surface of the abrasive 17 contacts the lower surface of the lower roll 32. As a result, the lower roll 32 is polished by the abrasive 17.

  When finishing the polishing operation, the operator depressurizes the inside of the cylinder 6 by performing a predetermined operation such as turning off the start lever. When the inside of the cylinder 6 is depressurized, the upward repulsive force generated when the abrasive 10 and the upper roll 31 are pressed against each other is reduced, and accordingly, the cylinder 6, the mounting plate 5, the guide rod 12, the mounting plate 14 and the arm. 15 moves downward by its own weight. As a result, the abrasive holder 16 and the abrasive 17 fixed to the arm 15 also move downward, and the abrasive 17 moves away from the lower surface of the lower roll 32, so that the polishing of the lower roll 32 is completed.

  After that, when the lower end portion of the column support pipe 4 comes into contact with the upper surface of the mounting plate 34 and the downward movement of the cylinder 6 is completed, the rod 7 moves upward along with further pressure reduction in the cylinder 6. As a result, the holder mounting portion 8, the abrasive holder 9 and the abrasive 10 connected to the lower end of the rod 7 also move upward. Therefore, the abrasive 10 is separated from the upper surface of the upper roll 31, and the polishing of the upper roll 31 is completed.

  When the polishing ability is reduced, the abrasives 10 and 17 are taken out from the abrasive holders 9 and 16, and the abrasives 10 and 17 are exchanged. In general, since the housing of the rolling mill 30 exists on both axial sides of the upper and lower rolls 31 and 32, it is difficult to replace the abrasives 10 and 17 from the axial direction of the upper and lower rolls 31 and 32. Therefore, when exchanging the abrasives 10 and 17, the operator performs work by inserting his / her hands from the direction perpendicular to the axis of the upper and lower rolls 31 and 32 (rolling direction).

When exchanging the abrasive 10, the operator inserts his hand from the rolling direction to release screwing between the holder mounting portion 8 and the abrasive holder 9, and removes the abrasive holder 9 from the holder mounting portion 8. Remove. Then, the abrasive holder 9 is taken out from the rolling direction as it is, and the abrasive 10 is replaced. Alternatively, the operator inserts his / her hand from the rolling direction to rotate the abrasive holder 9 by 90 ° from the mounting state on the holder mounting portion 8 so that the longitudinal direction of the abrasive holder 9 coincides with the rolling direction. In this state, the abrasive 10 is pulled out from the longitudinal direction of the abrasive holder 9, that is, the rolling direction, and the abrasive 10 is replaced.
Further, when exchanging the abrasive 17, the operator inserts his hand from the rolling direction and pulls out the abrasive 17 from the opening above the abrasive holder 16.

(effect)
As described above, in the above embodiment, by pressing the cylinder disposed above the upper roll and moving the rod downward, the upper polishing section connected to the lower end of the rod is moved downward to hit the upper roll. Since it can be contacted, the upper roll can be properly polished by the upper polishing section. At this time, since the cylinder is configured to be movable up and down with respect to the upper roll, the cylinder can be moved upward by an upward repulsive force generated by the upper polishing portion being pressed against the upper roll. Therefore, as the cylinder moves upward, the lower polishing portion connected to the cylinder can be moved upward and brought into contact with the lower roll, so that the lower roll is appropriately polished by the lower polishing portion. be able to.
Thus, the upper and lower polishing sections can be operated with one cylinder to polish the upper and lower rolls simultaneously. Therefore, the number of components of the roll polishing apparatus can be reduced, and space can be saved.

In addition, it is possible to remotely control the start and end operations of the roll polishing work, and the operator can perform the roll polishing work without directly touching the roll. Removal can be performed.
Furthermore, the upper polishing section and the lower polishing section are arranged above and below the upper and lower rolls, respectively, and it is not a configuration in which a polishing machine pedestal or the like is arranged on the entry side or the exit side of the upper and lower rolls. Even when the worker performs some work on the entry side or the exit side, the roll polishing apparatus does not interfere with the work.

  Further, the abrasive holder is configured to be rotatable at least 90 ° around the vertical axis with respect to the member to which the abrasive holder is connected, and the abrasive is configured to be removable from the longitudinal direction with respect to the abrasive holder. When the abrasive is replaced, the abrasive can be removed in a state where the longitudinal direction of the abrasive holder coincides with the roll axis direction (rolling direction). Therefore, even if there are housings or the like on both sides in the longitudinal direction of the abrasive holder and it is difficult to replace the abrasive from the axial direction of the roll, the abrasive can be replaced from the rolling direction as described above. .

  Further, if the abrasive holder is configured to be detachable from the member to which it is connected, it is possible to perform polishing even when it is difficult to replace the abrasive while the abrasive holder is mounted on the roll polishing apparatus. The material holder can be removed from the roll polishing device to replace the abrasive. In addition, since the abrasive holder is removable, it is possible to replace the abrasive holder as well as the abrasive holder.

(Modification)
In the above embodiment, the abrasive holder 16 holding the abrasive 17 for the lower roll 32 is attached to the mounting member (arm 15) in the same manner as the abrasive holder 9 holding the abrasive 10 for the upper roll 31. Alternatively, it may be detachably connected (rotatable).

  DESCRIPTION OF SYMBOLS 1 ... Roll grinder, 2 ... Nut, 3 ... Support | pillar, 4 ... Support | pillar support pipe, 5 ... Mounting plate, 5a ... Rod insertion hole, 6 ... Cylinder, 7 ... Rod, 8 ... Holder attachment part, 9 ... Abrasive material holder , 9a ... groove, 10 ... abrasive, 10a ... abrasive mounting member, 10b ... guide portion, 11 ... nut, 12 ... guide rod, 13 ... nut, 14 ... mounting plate, 15 ... arm, 16 ... abrasive holder, 17 ... Abrasive, 30 ... Roller, 31 ... Upper roll, 32 ... Lower roll, 33 ... Mounting plate, 34 ... Mounting plate, 34a ... Holder insertion hole

Claims (3)

A roll polishing apparatus for polishing a pair of upper and lower rolls,
A cylinder vertically disposed above the upper roll and movable up and down with respect to the upper roll;
A rod that moves up and down relative to the cylinder in response to pressure fluctuations in the cylinder;
An upper polishing portion connected to the lower end of the rod and capable of polishing the outer peripheral surface of the upper roll;
A lower polishing portion connected to the cylinder and capable of polishing the outer peripheral surface of the lower roll;
The upper polishing portion is disposed above the upper roll so as to be separated from the upper roll when the cylinder is depressurized, and moves downward as the rod moves downward when the cylinder is pressurized. Configured to contact the upper surface of the upper roll,
The lower polishing section is disposed below the lower roll when the cylinder is depressurized, and is separated from the lower roll. When the cylinder is pressurized, the upper polishing section and the upper roll are in contact with each other. A roll polishing apparatus, wherein the cylinder moves upward as the cylinder moves upward due to a repulsive force received from the upper roll, and contacts the lower surface of the lower roll. The upper polishing portion and the lower polishing portion each include an abrasive and an abrasive holder for holding the abrasive, and the longitudinal direction of the abrasive holder coincides with the axial direction of the upper roll and the lower roll. Are arranged so that
The abrasive is configured to be detachable from the abrasive holder from the longitudinal direction of the abrasive holder,
2. The roll polishing apparatus according to claim 1, wherein the abrasive holder is configured to be rotatable at least 90 [deg.] About a vertical axis with respect to a member to which the abrasive holder is connected. The upper polishing portion and the lower polishing portion each include an abrasive and an abrasive holder for holding the abrasive,
The roll polishing apparatus according to claim 1 or 2, wherein the abrasive holder is configured to be detachable from a member to which the abrasive holder is connected.

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