JP2000084804A - Grinding wheel polishing device for cylindrical body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinding wheel polishing device for a cylindrical body capable of two-head polishing and four-head polishing from both sides. SOLUTION: A cylindrical body W is chucked from both sides by chucking means 2 and 4. A driving side spindle 1 is rotated and driven by a motor for rotating a cylinder 9. A movable X table 32a is provided in a longitudinal direction of the cylinder W. A Y table 23a is provided on the X table. A polishing grinding wheel 19b is rotated by a motor for rotating a grinding wheel and an end surface of the polishing grinding wheel 19b is pressed to the cylinder by a constant pressing force so as to polish the cylinder. A ball screw for moving a Y table 29 is rotated by a motor for moving a Y table 23b as a servomotor, and a ball nut for moving a Y table 30 is held elastically through a rubber 31 and held so as not to rotate with respect to the Y table 23a. The motor for moving a Y table 23b rapidly transfers the Y table 23a so that the polishing grinding wheel 19b is in proximity to the cylinder and a constant torque is transmitted by slow rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of polishing a cylindrical object to be polished by applying a stable and constant pressing force to the cylindrical object. The Y-table is not a double table structure. The present invention relates to a cylindrical grindstone polishing apparatus capable of reducing the grinding wheel.

[0002]

2. Description of the Related Art Conventionally, a grindstone polishing apparatus for a cylindrical body which applies a certain pressing force to a cylindrical body to be polished and performs cylindrical polishing has been known. It has an X table that can reciprocate in the direction, and the X table has one or more Y table devices that can move in the direction of approaching / separating from the cylinder. It is provided on each Y table movably in the direction of separation, a spindle is supported by the movable bracket, a polishing wheel is fixed to the spindle, and the polishing wheel is rotated by a wheel rotating motor. In order to polish, rotate the cylinder and rotate the grinding wheel, move the Y table, lock the grinding wheel close to the cylinder, and then extend the air cylinder. Move the X table pressed against the cylindrical body from the polishing grindstone by moving a configuration of polishing.

[0003]

The above-mentioned conventional grindstone polishing apparatus for a cylindrical body maintains the pressure of the working gas at the time of the extension operation of the air cylinder at a constant pressure, thereby pressing the polishing grindstone against the cylindrical body at a constant pressure. Is what you do. Polishing at both ends of the cylindrical body is performed in a state where one-third to less than half of the grinding wheel is in contact with the cylindrical body, so the polishing pressure is increased, polishing is excessively performed, and the diameter of both ends of the cylindrical body is reduced. There was a defect. Also, in order to prevent this, the pressure of the working gas during the extension operation of the air cylinder was artificially reduced until the entire polishing width of the grinding wheel came into contact with the cylindrical body. Polishing of both ends was inaccurate. The cylinder rotates not in a perfect circle but around. For this reason, the size of the protrusion and retreat of the cylindrical surface on one side is about 60 μm at the maximum for the plate making roll. Correspondingly Y
The table needs to reciprocate and follow the fine dimensions and the grinding wheel must be pressed against the cylinder at a constant pressure. However, the pressing force of the grinding wheel against the cylinder fluctuates because high-speed reciprocation is not possible. Was. In addition, the conventional cylindrical grindstone polishing device has a double table structure in which the Y table and the movable bracket move independently in the same direction. Therefore, the guide structure is duplicated, and a lock device and a compressor are required. , The structure was complicated and the production cost was high.

[0004] On the other hand, a conventional grindstone polishing apparatus for a cylindrical body having a plurality of polishing heads is premised on performing a polishing operation by hand. Therefore, one side of the cylindrical body to be chucked by the cylindrical body rotating means. And two or three polishing heads. In addition, the conventional cylindrical grindstone polishing apparatus has a ball screw that has two guide rails laid down and rotated by a motor between the guide rails, below the cylindrical body on which the opposite driving side chuck means is chucked at both ends.
A ball nut screwed into a ball screw is fixed to a movable table fixed to four linear blocks engaged and guided by two guide rails, and these are covered with a long cover. Both ends of the lower portion of the movable bracket that supports the chucking means are fixed to the movable table via lower gaps at both ends in the width direction of the cover. The above-described conventional grindstone polishing apparatus for a cylindrical body has a problem that chattering occurs when the natural frequency of the cylindrical body matches the polishing pressure.
After trying various methods to eliminate this chatter, 50K
It was found that when a pressing force in the order of g was applied to the center of the length of the cylindrical body from the non-polishing side, it did not resonate with the natural frequency of the cylindrical body. Further, in the above-described conventional grindstone polishing apparatus for a cylindrical body, a large amount of lubricant or cleaning water invades through gaps below both ends in the width direction of the cover and adheres to guide rails and ball screws covered with the cover, resulting in polishing. There is a disadvantage that a large amount of dust accumulates and rusts the guide rails, ball screws, and the like early.
When the cylindrical body is a printing roll, printing is not performed if the middle diameter of the printing roll is larger or smaller than the diameter of both ends, so that the printing roll requires extremely high cylindrical accuracy. In addition, even higher roll accuracy is required for roll rolls. However, when the cylindrical grinding of the cylindrical body is performed with the grinding wheel polishing device, the surface of the grinding wheel gradually collapses, so that the cylindrical grinding is performed by correcting the amount and performing the cylindrical grinding. . However, when the cylindrical precision of the cylindrical body before the cylindrical polishing is low, the cylindrical precision with the above-mentioned conventional correction does not always increase the cylindrical precision. When the cylinder is polished from one end to the other end of the cylinder at one time with a large grinding allowance by making corrections with a grinding stone polishing device with high cylindrical accuracy, the cylindrical polishing that reflects the cylindrical accuracy of the cylindrical body before cylindrical polishing is reflected as it is Only accuracy can be obtained. Even if the cylindrical body of the cylindrical body before polishing is low, in order to obtain high cylindrical precision, use a grindstone polishing device with extremely high cylindrical precision and compensate for the amount by which the surface of the grinding wheel gradually collapses It was necessary to eliminate the difference between the diameters of the middle and both ends of the cylindrical body by repeating the process of polishing the cylinder so as to obtain a very small polishing allowance. And
After cylindrical polishing, it is necessary to remove the cylindrical body and place it on a measuring instrument to measure the cylindrical precision. If the cylindrical precision is not obtained, the cylindrical body is again precision-polished and the cylindrical precision is measured again. This was very complicated and time-consuming because of the repetition. Also, when the cylindrical polishing is repeated, the diameter of the cylindrical body may be too small. The problems described in this section have been excluded from the scope of the invention as being solved in the embodiment.

The present invention has been devised to solve the problems described in the section [0003]. The cylindrical table can be polished by applying a stable and constant pressing force to the cylindrical body, and the Y table has a double table structure. It is another object of the present invention to provide a grindstone polishing apparatus for a cylindrical body, which is simple in structure and assembly and can reduce the production cost.

[0006]

According to the present invention, there is provided a cylinder rotating means having a driving side chucking means and a non-driving side chucking means, wherein both ends of a cylindrical body are chucked horizontally by both chucking means, and the cylindrical body rotating means. Provided on a Y-table movable in the horizontal diametric direction of a cylindrical body provided on an X-table movable in the surface length direction, the grinding wheel is rotated by a grinding wheel rotating motor, and the end face of the grinding wheel is pressed with a constant pressing force. A polishing head device capable of polishing by pressing against a cylindrical body. The Y-table moving ball screw is screwed with the Y-table moving ball screw by rotating the Y-table moving ball screw by a Y-table moving motor which is a servomotor. The ball nut is non-rotatable with respect to the Y table and is elastically held via a rubber body. The Y table moving motor includes:
The present invention provides a grindstone polishing apparatus for a cylindrical body, wherein the Y-table is fast-forwarded so that the polishing grindstone approaches the cylindrical body, and then rotates slowly to output a constant torque.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cylindrical grinding wheel polishing apparatus according to an embodiment of the present invention will be described. As shown in FIGS. 1 to 3, a cylindrical grinding wheel polishing apparatus for a cylindrical body according to the present invention includes a frustum-shaped drive side chuck means 2 provided at an opposite end of a drive side spindle 1 and a non-drive side spindle 3. The conical chuck holes at both ends of the cylindrical body W are chucked by a frustum-shaped conical anti-drive side chucking means 4 provided at the opposite end of the cylindrical body W. A cap 5 or 6 is provided outside the driving spindle 1 and the non-driving spindle 3, and when the cylindrical body W is chucked, the cylinder W is stroked in the chucking direction by the pressure fluid and comes into contact with the end face of the cylindrical body W. The drive-side spindle 1 or the non-drive-side spindle 3 is hermetically sealed so as to be integrally rotatable, thereby preventing polishing dust, abrasives, and cleaning water from entering.

The drive-side bracket 7 is an L-shaped bracket that extends horizontally as if the “L” shape is rotated right by 90 degrees and then hangs down. The base end corresponds to the drive-side spindle 1 on the rear surface of the frame 8. It is fixed to an upper part, and supports the drive-side spindle 1 at the lower part of the projecting side. The cylindrical body rotation motor 9 is mounted on the upper part of the frame 8 (or the drive side bracket 7), and has a timing gear 10,
The drive side spindle 1 is rotationally driven via a timing belt 11 and a timing gear 12.

The anti-drive-side bracket 13 is an L-shaped bracket similar to the drive-side bracket 7 and has a base end provided at an upper portion corresponding to the cylindrical body W on the rear surface of the frame 8. Engagement guides 14, 14 support the non-drive side spindle 3 so as to be movable by a fixed stroke. The non-drive side spindle 3 is urged by a strong coil spring 15 to a position closer to the chuck direction. The chuck motor 16 uses a servo motor and is connected to rotate a ball screw 17. A ball nut 18 screwed to the ball screw 17 is fixed to the non-drive side bracket 13. The chuck of the cylindrical body W is horizontally supported by an industrial robot (not shown), one of the holes to be chucked is fitted to the driving side chucking means 2, and then the chucking motor 16 is moved to the cylindrical body in which data is input in advance. It rotates by the number of rotations corresponding to the length of the body W, and is locked non-rotatably by a brake device (not shown). Then, the non-drive side bracket 13 moves in the chucking direction due to the screwing of the ball screw 17 and the ball nut 18, and the non-drive side chuck means 4 is fitted into the other chucked hole of the cylindrical body W. The non-drive side spindle 3 supporting the non-drive side chuck means 4 compresses a strong coil spring 15 and slides. Therefore, the chucking forces of the driving side chucking means 2 for chucking the cylindrical body W and the non-driving side chucking means 4 are as follows.
This is the urging force of the coil spring 15. If the urging force of the coil spring 15 is small, chatter easily occurs during polishing,
A strong coil spring 15 is required. If the urging of the coil spring 15 is not used, a high-output torque motor is used, or the motor is abolished and a high-output cylinder device is adopted.

The structure in which the driving bracket 7 and the non-driving bracket 13 are extended in an L-shape from the upper portion of the rear surface of the frame 8 to support the driving spindle 1 and the non-driving spindle 3 is used. The mechanism for moving and guiding the drive-side bracket 13 in the surface length direction of the cylindrical body W is arranged so that the lubricant and the washing water do not drip, and the industrial robot (not shown) can handle the cylindrical body W from above. To do that.

[0011] Four polishing head devices 19, 20, 21, and 22 are provided on both sides of the cylindrical body W which is horizontally chucked by the driving-side chucking means 2 and the non-driving-side chucking means 4. The four-polishing head device can grind the cylindrical body W in various variations.

Four polishing head devices 19, 20, 21,
Reference numeral 22 denotes a polishing grindstone 19b, 20b, 21b having a structure having an auto tool chucking function (details are well-known in a machining center or the like and not shown, so that the shaft portion is fixedly chucked to the polishing rotary shaft 19a, 20a, 21a or 22a) or 22b, and the polishing rotary shafts 19a, 20a, 2a
1a or 22a is a grinding wheel rotation motor 19c, 20c,
It is designed to be rotated by 21c or 22c. The polishing wheels 19b and 20b face one axis with the end faces toward the cylinder W, and the polishing wheels 21b and 22b face one axis with the end faces toward the cylinder W.

The four polishing head devices 19, 20, 21,
The apparatus main body 22 includes Y table apparatuses 23, 24, 25,
Or 26 Y tables 23a, 24a, 25a, or 2
6a, the linear guides 27, 27 and the linear block 28,
28 and the X table 31
Each Y table motor (servo motor) provided in a
23b, 24b, 25b or 26b as a driving source
Through the ball screw 29 for moving the table and the ball nut 30 for moving the Y table, they can be individually moved with respect to the approach / separation movement with respect to the cylinder W. The Y table moving motor 23b, 24b, 25b, or 26b rotates the Y table moving ball screw 29, and the Y table moving ball nut 30 screwed to the Y table moving ball screw 29 cannot rotate with respect to the Y table. Further, it is held on the Y table via the rubber body 31. The Y-table moving motors 23b, 24b, 25b, or 26b apply a constant number of rotations to the Y-table moving ball screw until the corresponding polishing grindstone approaches the cylindrical body W.
4a, 25a, or 26a is fast-forwarded, and after the corresponding grinding wheel approaches the cylindrical body W, it is continuously rotated at a slow speed in the same direction and the grinding wheel is brought into contact with the cylindrical body W to constantly apply a constant torque to the Y-table moving ball screw. By giving the grinding wheel 29, the grinding wheel is pressed against the cylindrical body W at a constant pressure. The cylindrical body W rotates not in a perfect circle but in a whirling manner. For this reason, the dimensions of the protrusion and retreat of the cylindrical surface on one side are:
For a plate-making roll, the maximum thickness is about 60 μm. Correspondingly, Y tables 23a, 24a, 25a, 26a
It is necessary to reciprocate and follow the reciprocating motion in a very small dimension, and it is necessary to press the polishing grindstone against the cylindrical body W at a constant pressure, but the pressing force of the polishing grindstone against the cylindrical body fluctuates because high-speed reciprocating motion is impossible. I do. However, Y tables 23a, 2
4a, 25a, and 26a cannot reciprocate at high speed with small dimensions. The rubber body 31 bends to complement the Y-tables 23a, 24a, 25a, and 26a from being unable to reciprocate at high speed with small dimensions, and to have a cylindrical body W.
This serves to alleviate the fluctuation of the pressing reaction force caused by the whirling rotation of the Y-table and to interrupt the transmission of the fluctuation of the torque reaction force to the Y table moving ball screw 29. So,
Y table moving motors 23b, 24b, 25b, 26
b outputs a stable constant torque.

The X table device 32 includes an X table 32a.
Are mounted on the base 32f via the linear guide 32b and the linear block 32c and the linear guide 32d and the linear block 32e, and the ball screw 32h is driven by an X table motor (servo motor) 32g provided on the frame 8 as a driving source. And a ball nut runner 32i so as to be movable along the surface length direction of the cylindrical body W. The X table 32a is movable more outward than both ends of the cylindrical body W having the maximum length in the surface length direction of the cylindrical body W.

Therefore, the four polishing head devices 19, 2
0, 21 and 22 move individually with the movement of the corresponding Y table with respect to the approach / separation movement with respect to the cylindrical body W, and move with the X table 32a with respect to the movement of the cylindrical body W in the surface length direction. It is designed to move integrally.

Since the Y table devices 23, 24, 25 and 26 and the X table device 32 are located below the cylindrical body W, the linear motion / guide structure portions of the Y table devices 23, 24, 25 and 26 are covered by a cover 33. , 34, and the linear motion / guide structure portion of the X-table device 32 is covered with a cover 35 to prevent the inflow of lubricant and washing water.

The door 36 is provided so as to cover a cylindrical body opening / closing opening extending from the front side surface to the upper surface of the casing 37, and to move horizontally and open when the cylindrical body is taken in / out. On the ceiling of the door 36, three liquid supply pipes 38, 39, and 40 having downward spray nozzles at small pitches are provided so as to be movable integrally with the door 36. The lubricating liquid for polishing (medium water) is sprayed from both the injection nozzles 38 and 40 to both sides of the entire length of the cylindrical body W. After the polishing is completed, the cleaning water (water) is injected from the injection nozzle of the liquid supply pipe 39. (Tap water) is sprayed onto the upper surface of the entire length of the cylindrical body W.

The control unit 41 receives data such as a diameter value, a roll length, and a hole diameter of a hole to be chucked from the one end to the other end of the cylindrical body W to be polished at a constant pitch. Based on the data, the chuck motor 16 and the Y table motors 23b, 24b,
5b, 26b and the X table motor 32g are controlled and driven. The control device 41 includes a Y table motor 2.
The end surface positions of the unused grinding wheels corresponding to the origin positions of 3b, 24b, 25b, and 26b are input as initial data, and the Y table motor 23 at the end of polishing is used.
The rotation angles of the cylinders b, 24b, 25b, and 26b from the origin positions are stored in a memory, and the Y table motors 23b, 24b after each polishing are obtained from the diameter value of the cylindrical body W and the effective polishing allowance which are input as data. , 25b, and 26b, the end surface positions of the grinding wheels corresponding to the origin positions are stored and used for the next polishing. Further, the control device 41
For example, the polishing wheel 1 of No. 320 is used as a polishing allowance, for example, using the deviation of each diameter value inputted as data from the minimum diameter value as a polishing allowance.
9a, random polishing is performed to set the minimum diameter value from one end to the other end of the cylindrical body W. Then, double polishing is performed from one end to the other end of the cylindrical body W with the No. 320 polishing grindstones 19a, 20a to obtain a polishing allowance. Then, the power of the motor of the drive source of the # 320 polishing wheels 19a and 20a is turned off, and the polishing is performed by rotating from one end to the other end of the cylindrical body W. And then the semi-finished polishing is performed from one end to the other end of the cylindrical body W by the 800th grinding wheel 21a, and then the power source of the motor of the driving source of the grinding wheel 21a is turned on. It is turned off and is rotated together to realize polishing equivalent to the medium finish polishing using a grinding wheel of No. 1500 to No. 1600, and then a polishing wheel of PVA No. 6000 of No. 6000
2a, software for performing upper finish polishing from one end to the other end of the cylindrical body W, and then turning off the motor of the driving source of the polishing grindstone 22a to carry out co-rotating polishing to selectively achieve mirror polishing is stored. ing.

The control circuit 41 conducts random polishing with the polishing grindstone 19a to make the diameter from one end to the other end of the cylindrical body W the minimum diameter value. The X table 32a is made movable in the direction of the surface length of the cylindrical body W so that the grinding wheel performs the required reciprocating polishing corresponding to the polishing allowance, using the deviation value of the X as the polishing allowance for the cylindrical body. Table moving motor 32g
Is configured to perform forward and reverse rotation control. That is,
The control target directly by the control circuit 41 is the X-table moving motor 32g, which performs forward / reverse rotation control. The ultimate control target is the polishing grindstone 19a, and the polishing grindstone 19a corresponds to the polishing allowance portion. It is to perform required reciprocating polishing. Therefore, a specific example of the reciprocating movement control of the polishing grindstone 19a by the control circuit 41 is shown in FIGS.
This will be described with reference to FIG. FIG. 4A shows a state where a cylindrical body W which is chucked and rotated at both ends by the driving side chucking means 2 and the non-driving side chucking means 4 is polished by a polishing grindstone 19a. 9 shows the pre-polishing diameter value obtained by correcting the measured diameter value of each section for each constant pitch of the body W. FIG. 4 (a) measures the diameter at a position 10 mm away from one end of the cylindrical body W, then measures the diameter at a 30 mm pitch,
A position 10 mm away from the last measurement point to the other end of the cylindrical body W is shown. The diameter was measured to the third decimal place and rounded to the third decimal place. The polishing grindstone 19a is in close contact with the cylindrical body W and moves in one direction while maintaining a constant polishing pressure, so that a single polishing dimension becomes 2.5 microns.
Polishing pressure is adjusted so that polishing can be performed,
When the grinding wheel 19a polishes one round trip, the cylindrical body W has a diameter of 1
Polished to a size of 0 microns. Therefore, since the minimum value of the diameter before polishing in each section is the second decimal place, the polishing size of a single grinding wheel is 2.5 microns, so that the polishing size is four times as large as the single polishing size. Value has been corrected. FIG. 4B illustrates the pre-polishing diameter value of each section of the cylindrical body by a bar graph of block stacking, and the order of removing the blocks is indicated by arrows and numbers to explain the moving order of the polishing grindstone 19a. In the figure, the numerical value on the left is the diameter value, and one division is 5 microns. Therefore, the height of one block is 5 microns. Since the polishing size of one polishing wheel is 2.5 microns, the polishing wheel 19
One block can be removed by making one round trip of a. Hereinafter, it will be conceptually described that the diameter is finally uniform through the description of the order of removing the blocks. If the blocks are stacked, removing the lower block will lower the blocks stacked on it by one step. Actual polishing cannot be performed first from the inside. However, it can be considered that the polishing in a certain section is conceptually determined to be not the polishing of the uppermost block but the polishing of the lower block, and the polishing is performed with a smaller diameter. Then, the polishing wheel 19a is brought into close contact with the cylindrical body W, and the polishing pressure is kept constant so that the polishing size per one time becomes 2.5 microns, and reference numerals 1 to 18 attached to the arrows in FIG. By repeating the reciprocating movement in the order shown in (1) and removing the block that has been polished once, the entire length of the cylindrical body can be polished to a small uniform diameter that is polished once more than the minimum diameter value before polishing. The numbering from 1 to 18 in FIG. 4B, which indicates the order of the reciprocating movement of the polishing grindstone 19a, complies with the following rules. Blocks corresponding to a polishing margin portion larger than the minimum diameter value before polishing are denoted by reference numerals 1, 2, 4, and 4 attached to arrows in FIG.
In the order of 6, 8, 10, 12, 14, 16 the reciprocating polishing is removed in the order of completion. Therefore, since the blocks are stacked in proportion to the diameter value before polishing, the blocks corresponding to the polishing allowance portion larger than the minimum diameter value before polishing in each section reciprocate the polishing movement by the number of the stacked blocks. You can remove them all when you do. For example, reference numeral 1 in FIG.
Conceptually removing the blocks at the same stage by performing the reciprocating polishing means that when the polishing allowance portion of each section is continuously present, the continuous section is reciprocally polished. In addition, when a continuous section is reciprocally polished so as to remove a block of the same stage conceptually by performing reciprocating polishing of, for example, reference numeral 2 in FIG. 4B, a block of a reciprocating section of reference numeral 4 and a reciprocating section of reference numeral 6 Break up into blocks. Therefore,
The grinding wheel is polished in the direction of the reference numeral 3 of the block of the arrow section of the reference numeral 3 to perform reciprocal polishing of the reference numeral 4 to remove the block of the arrow section of the reference numeral 4, and then to the reference numeral 5 of the block of the arrow section of the reference numeral 5. Then, the reciprocating polishing of reference numeral 6 is performed to remove the block in the section indicated by the reference numeral 6 so that the polishing pressure of the polishing wheel is not reduced to zero and the polishing wheel is not separated from the cylindrical body. That is, when at least once the reciprocating polishing is performed and the remaining polishing allowance is separated, the section already polished to the minimum diameter value before polishing is polished and moved from one end of the cylindrical body to the other end. Further, FIG.
When the reciprocating polishing indicated by reference numeral 16 in (b) is performed, the polishing is performed until there is no polishing margin larger than the minimum diameter value before polishing. Polish the polished section. Thus, the entire length of the cylindrical body is intermittently polished so as to have a small uniform diameter obtained by polishing once in one direction from the minimum diameter value before polishing. Therefore, finally, backward polishing indicated by reference numeral 18 in FIG. 4B is performed from the other end to the one end of the cylindrical body. As a result, the entire length of the cylindrical body is polished so as to have a uniform diameter smaller than the minimum diameter value before polishing by one round trip. It is impossible to perform actual polishing first from the inside, but when performing the grinding wheel polishing as described in the order of removing the above blocks, the state where the diameter of the cylindrical body is reduced,
Therefore, as if removing the lower block, the upper block dropped one step, and it can be conceptually grasped so as to correspond to the order in which the blocks are removed, and as a result,
By moving the grindstone to the minimum necessary, the entire length of the cylindrical body can be precisely polished so as to have a small uniform diameter obtained by reciprocating the entire length of the cylindrical body once more than the minimum diameter value before polishing. FIG. 4 (b)
It is not necessary to perform the polishing of the middle reference numeral 18. The reason is that the diameter becomes uniform when the polishing of reference numeral 17 is completed. In short, the grinding wheel 1 by the control circuit 41
In the reciprocating movement control of 9a, the polishing grindstone 19a is brought into close contact with the cylindrical body W to keep the polishing pressure constant for the minimum value of the measured diameter value of each section measured at a constant pitch from one end to the other end of the cylindrical body W. When moving in one direction, set the diameter before polishing in each section corrected to a value approximating to be four times the single polishing dimension, and reciprocate while maintaining the polishing pressure constant while the polishing wheel is in close contact with the cylindrical body. By polishing while repeating the above, the entire length is polished once less than the minimum diameter value before polishing, polishing to a small uniform diameter, the polishing margin portion larger than the minimum diameter value before polishing, the diameter value before polishing Polishing is performed in proportion to the number of reciprocations, and in this case, when the polishing allowance portion of each section is continuously present, the continuous section is reciprocally polished, and the reciprocating polishing is performed at least once, and the remaining polishing allowance portion is separated. Sometimes, before polishing Polishing movement so as not to overlap the section polished to the diameter value, reaching the polishing margin portion, reciprocating polishing the polishing margin portion, polishing until there is no polishing margin portion larger than the minimum diameter value before polishing, the cylindrical body The remaining section which has already been polished to the minimum diameter value before polishing is moved to the other end.

The cylindrical grinding wheel polishing apparatus according to this embodiment includes a non-drive side bracket for supporting the drive side chuck means, a non-drive side bracket for supporting the non-drive side chuck means, and a non-drive side bracket. By providing a linear motion guide mechanism that moves in the direction of the surface length of the frame from above the rear surface of the frame, lubricant and cleaning water do not drool onto the linear motion guide mechanism of the non-drive side bracket, and the cylindrical body to be chucked is A large space on the lower side can be secured as a table installation space, and a table device movable in the X and Y directions can be provided so as not to interfere with the chuck means of the cylindrical body and the bracket supporting the chuck means. In addition, a handling space can be secured above the cylindrical body to be chucked, and a system can be realized in which one or two pairs of grinding wheels are opposed to both sides of the cylindrical body. Double polishing can be performed by sandwiching the cylindrical body between one or two pairs of opposing grinding wheels. Even if the polishing pressure is increased and the polishing allowance is increased, the polishing pressures on both sides cancel each other, resulting in chattering. No short-time polishing can be realized. Therefore, this method is suitable for a case where the polishing allowance of the cylindrical body is large, such as plate drop polishing after the plate-making roll (used printing roll) is subjected to dechroming plating, and leads to a drastic reduction in plate drop polishing time. . A handling space for the cylindrical body can be secured above the cylindrical body to be chucked. A range in which the polishing head slides outward from the both ends of the cylindrical body of the maximum length in the plane direction, and a chuck rotation that chucks and rotates the cylindrical body of any length from the minimum length to the maximum length. The structure is such that the range in which the means slides does not overlap, and a structure in which interference between the movable members constituting the apparatus is avoided is realized, so that double polishing and double / double polishing can be realized. When four polishing head devices are provided, the cylindrical body can be polished in various variations by installing polishing software. For example, four polishing head devices are sequentially selected, and rough finishing polishing-medium finishing polishing-finish polishing-mirror polishing is performed, or two polishing head devices are simultaneously operated to perform double rough polishing or double mirror polishing. It is possible to perform rough finish polishing and co-rotation polishing without driving the grindstone. In the second invention, the minimum diameter value data, the deviation value of the larger diameter value data as a polishing allowance of the cylindrical body, the grinding wheel corresponding to the polishing allowance, a grinding wheel is random required required Reciprocating polishing can be performed to minimize the diameter from one end to the other end of the cylindrical body, so it can be polished from one end to the other end of the cylindrical body with high precision and uniform diameter, minimizing the polishing allowance Can be suppressed, polishing can be realized for a short time,
For the cylindrical polishing of the plate roll, copper plating having a small film thickness is sufficient.

The present invention is not limited to the above embodiment. Drive-side chucking means for chucking one end of a horizontally positioned cylindrical body provided at the opposite end of the drive-side spindle,
An anti-drive-side chucking means provided at an opposite end of the anti-drive-side spindle to chuck the other end of the cylindrical body; and an upper portion of a rear surface of a frame extending in the direction of the drive-side spindle so that the drive-side spindle is A driving bracket to be supported, an upper portion of a rear surface portion of a frame or a cylindrical body rotation motor attached to the driving bracket to rotationally drive the driving spindle, and a portion above the cylindrical body of the rear surface portion of the frame. A non-drive-side bracket that is engaged and guided by the linear motion guide means along the cylinder and projects in the direction of the counter-drive side spindle to support the counter-drive side spindle; One or two pairs of Y-tables that are movable in the horizontal diametric direction of a cylinder provided on one or two X-tables that are movable in the surface length direction And a pair of two or more pairs of polishing head devices capable of rotating the polishing grindstone by a grindstone rotating motor and pressing the end face of the polishing grindstone against the cylindrical body with a constant pressing force to perform polishing. Applied to the body grinding device. When the cylindrical body W is a plate-shaped plate-making roll,
The drive-side chuck means 2 and the non-drive-side chuck means 4 have a cylindrical shape and are configured to be chucked on the roll shaft. An X-table device is provided which has two X-tables on both sides of the cylindrical body to be chucked by the cylindrical-body rotating means and is capable of reciprocating the X-table in the surface length direction of the cylindrical body using an X-table moving motor as a drive source. Is also good. Polishing head device is single, double,
Or you may prepare for triple. Further, the polishing head device may be provided double on both sides of the cylindrical body.

[0021]

According to the cylinder grinding wheel polishing apparatus of the present invention, a cylinder can be polished by applying a stable and constant pressing force to the cylinder to be polished. That is, the cylinder rotates not in a perfect circle but in a whirling manner. For this reason, the size of the protrusion and retreat of the cylindrical surface on one side is about 60 μm at the maximum for the plate making roll. Correspondingly, the Y table needs to reciprocate and follow the microscopic dimensions, and it is necessary to press the polishing whetstone against the cylindrical body at a constant pressure. The pressing force on the body also fluctuates. The rubber body complements the inability of high-speed reciprocating reciprocation of minute dimensions of the Y table, and reduces the fluctuation of the pressing reaction force caused by the swirling rotation of the cylindrical body to reduce the Y-table moving ball screw. In addition, it serves to cut off transmission that causes fluctuations in torque reaction force. Thus, the Y table moving motor outputs a stable constant torque. The Y table is not a double table structure, the structure is simple, the assembly is easy, the lock device and the compressor are not required, and the manufacturing cost can be reduced. Conventional cylindrical grindstone polishing devices are designed to press a polishing whetstone against a cylindrical body at a constant pressure to grind by maintaining a constant pressure of a working gas during an extension operation of an air cylinder. Polishing at both ends is performed in a state where one-third to less than half of the grinding wheel is in contact with the cylindrical body, so the polishing pressure is increased, polishing is excessively performed, and the diameter of both ends of the cylindrical body is reduced. Was. According to the present invention, the output torque of the servomotor can be controlled so as to gradually increase until the entire polishing area of the grinding wheel comes into contact with the cylindrical body, so that both ends of the cylindrical body are excessively ground. Can be avoided.

[Brief description of the drawings]

FIG. 1 is a plan view of a grindstone polishing apparatus for a cylindrical body according to an embodiment common to the first invention and the second invention of the present application.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1;

FIG. 4 is a diagram for explaining a method for polishing a grindstone of a cylindrical body according to an embodiment of the present invention. (A) shows the pre-polishing diameter value for each constant pitch of the cylindrical body when the cylindrical body is polished with a polishing grindstone. (B) is a diagram for explaining the movement of the polishing grindstone by indicating the pre-polishing diameter value of each section of the cylindrical body by a bar graph of a block stack and indicating the order of removing the blocks by arrows and numbers.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Drive side spindle 2 ... Drive side chuck means 3 ... Non drive side spindle 4 ... Non drive side chuck means 5, 6 ... Cap W ... Cylindrical body 7 ... Drive Side bracket 8 ・ ・ ・ Frame 9 ・ ・ ・ Motor for cylindrical body rotation 10, 12 ・ ・ ・ Timing gear 11 ・ ・ ・ Timing belt 13 ・ ・ ・ Non-drive side bracket 14 ・ ・ ・ Guide for non-drive side bracket 15 ・··· Coil spring 16 ··· Motor for chuck 17 ··· Ball screw 18 ··· Ball nut 19, 20, 21, 22 ··· Polishing head device 19a, 20a, 21a, 22a ··· Polishing rotary shaft 19b, 20b, 21b, 22b ··· Polishing whetstone 19c, 20c, 21c, 22c ··· Motor for rotating whetstone 23, 24, 25, 26 ··· Y table device 23a, 24a, 25a, 26a ... Y table 27 ... Linear guide 28 ... Linear block 23b, 24b, 25b, 26b ... Y table motor 29 ... Y table movement ball screw 30 ... · Y-table moving ball nut 31 ··· Rubber member 32 ··· X table device 32a ··· X table 32b ··· Linear guide 32c ··· Linear block 32d ··· Linear guide 32e ··· Linear block 32f ... base 32g ... X table motor 32h ... ball screw 32i ... ball nut runner 33, 34, 35 ... cover 36 ... door 37 ... casing 38, 39, 40 ・..Supply pipe 41 ... Control circuit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3C034 AA01 BB15 DD20 3C043 AA01 CC04 CC11 DD05 DD06

Claims (1)

[Claims] 1. A cylindrical body rotating means having a driving side chucking means and a non-driving side chucking means, both ends of which are chucked horizontally by both chucking means and rotating, and an X which is movable in a surface length direction of the cylindrical body. Provided on a Y-table movable in the horizontal diameter direction of a cylinder provided on the table, the polishing wheel is rotated by a motor for rotating the wheel, and the end surface of the polishing wheel is pressed against the cylinder with a constant pressing force to perform polishing. The Y-table moving ball screw is rotated by a Y-table moving motor which is a servo motor, and a Y-table moving ball nut screwed to the Y-table moving ball screw is attached to the Y-table. The Y-table moving motor fast-forwards the Y-table to move the polishing grindstone into a cylindrical body. Adjacent, then, the grindstone polishing apparatus of the cylinder, characterized in that is configured to output a constant torque to slow rotation.