JPH07246555A - Surface machining method and device of metallic cylinder - Google Patents

Abstract

PURPOSE:To machine continuously more machined surfaces with high accuracy as to a metallic cylinder which consists of aluminum or the like, without applying a dressing or the like on the way. CONSTITUTION:A metallic cylinder 10 is supported by a cylinder supporting device 20 in the rotating condition.. A polishing tape 37A is wound from a delivery roller 36A by a winding roller 34A, a tensile force is given to the polishing tape 37A, and the polishing tape 37A is pressed on the outer peripheral surface of the metallic cylinder 10 by a pressure roller 35A. Furthermore, the polishing tape 37A is moved in the longitudinal direction by the winding of the winding roller 34A in the processing condition. This longitudinal direction is crossed about square to the central axial direction of the metallic cylinder 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for processing a surface of a metal cylinder made of aluminum or the like and used for a photoconductor drum, a magnet roller, a heat roller or the like in a copying machine or a laser printer.

[0002]

2. Description of the Related Art Generally, a high degree of surface accuracy is required for the outer peripheral surface of a metallic cylindrical object used for the above-mentioned photosensitive drum and the like. Therefore, as a method of manufacturing such a metal cylinder, first, a raw pipe is formed by extrusion, and then the outer peripheral surface of the raw pipe is cut by a lathe or the like until the surface roughness Rmax becomes 1 μm or less. Was common.

However, it takes a very long time to carry out the above-mentioned cutting work, and there is an inconvenience that the cost becomes high accordingly. Therefore, conventionally, the following method has been considered as a method for rapidly processing the surface of the above-mentioned metal cylinder.

A) Rolling is performed while pressing a burnishing roll on the outer peripheral surface of the above-mentioned metal cylindrical object, thereby pushing out irregularities on the outer peripheral surface of the cylindrical object to improve surface accuracy (roller burnishing method).

B) A plurality of block-shaped grinding wheels are arranged in order from the coarsest one, and the metal cylindrical object is transferred in the arranging direction of the grinding wheels while rotating, so that the surface of the metal cylindrical object is exposed. Of the rough grinding wheels
Surface accuracy is gradually increased (Japanese Patent Laid-Open No. 5-237).
755).

[0006]

[Problems to be Solved by the Invention]

In the method A), since the burnishing roll has to be pressed against the metal cylinder with a considerably large pressure, when the rigidity of the metal cylinder is very low (for example, an aluminum thin-walled cylindrical pipe, etc.), the above pressure causes The metal cylinder itself may be deformed and the shape accuracy may be deteriorated.

In the method B), continuous processing is possible by transferring metal cylinders one after another, but with the progress of processing, metal powder is welded to the processed surface of the grinding wheel and the grinding force is increased. Therefore, it is necessary to frequently dress the grinding wheel to recover the grinding force, which greatly hinders improvement in production efficiency. Especially when the metal cylinder is made of so-called soft metal such as aluminum or copper,
The generation of the metal powder and the like is remarkable, and the frequency of dressing is further increased. Further, if the dressing timing is delayed, the abrasive grains may fall off from the grinding wheel and be embedded in the surface of the metal cylindrical object or may be peeled off, which may worsen the surface quality.

In view of such circumstances, the present invention provides a method and an apparatus for processing a surface of a metal cylindrical object capable of efficiently and continuously processing a larger number of processed surfaces without dressing a grindstone on the way. The purpose is to provide.

[0009]

Means for Solving the Problems As a means for solving the above problems, according to the present invention, while rotating a metal cylinder around its central axis, a polishing tape having abrasive particles adhered to its surface is applied in the longitudinal direction thereof. A pressure roller capable of rotating the polishing tape about an axis substantially parallel to the central axis of the metal cylinder in a state where tension is applied to the metal cylinder and its longitudinal direction is substantially orthogonal to the central axis of the metal cylinder. To press the outer peripheral surface of the metal cylindrical object to polish the outer peripheral surface, and as the polishing progresses, the polishing tape is moved in the longitudinal direction while rotating the processing roller. The contact point with the metal cylinder is changed (Claim 1).

This method is particularly effective when the metal cylinder is made of aluminum or aluminum alloy (claim 2).

In the above method, a plurality of polishing tapes having different fineness from each other are arranged in the direction of fineness of the polishing tapes in the direction of the central axis of the metal cylinder, and the polishing tapes having the coarsest order are sequentially arranged. By moving the metallic cylinder in the direction of the central axis while rotating it about the central axis so as to contact the outer peripheral surface of the metallic cylinder, more excellent effects as will be described later can be obtained. 3).

Further, in the above method, it is more preferable that the polishing tape and the pressure roller are vibrated in the central axis direction of the metal cylinder while the polishing tape and the metal cylinder are in contact with each other (claim 4). .

According to the present invention, a cylindrical member supporting means for supporting a metallic cylindrical member while rotating it about its central axis, a polishing tape having abrasive particles adhered to the surface thereof, and a feeding roller for feeding this polishing tape are provided. A winding roller that winds the polishing tape while pulling it in the longitudinal direction, a winding driving means that drives the winding roller in the tape winding direction, and a rotation about an axis that is substantially parallel to the central axis of the metal cylinder. A pressure roller for pressing the portion of the polishing tape between the feed roller and the take-up roller against the outer peripheral surface of the metal cylinder, and the pressure roller for the metal cylinder. And a pressurizing means for pressurizing the polishing tape in a direction toward the direction, and the longitudinal direction of the polishing tape is substantially orthogonal to the central axis of the metal cylinder (claim 5).

In this apparatus, a plurality of polishing tapes having different fineness are arranged in the direction of the fineness of the polishing tapes in the direction of the central axis of the metal cylinder, and the polishing tapes having the coarsest mesh are sequentially arranged. The cylinder supporting means is constructed so as to transfer the metal cylinder in the direction of the central axis while rotating the metal cylinder around the center axis so as to make contact with the outer peripheral surface of the cylinder, and also to supply each polishing tape. , Winding rollers for winding each polishing tape, and pressure rollers for pressing each polishing tape against the outer peripheral surface of the metal cylindrical object are connected in the axial direction of each roller to rotate coaxially. And at least each winding roller is configured to integrally rotate about a common rotating shaft, and the winding driving means is connected to the common rotating shaft of these winding rollers. DOO is more preferable (claim 6).
Here, the "coupling in the axial direction of each roller" may be a method in which the rollers are interconnected via a central axis or a method in which the rollers are integrated in the axial direction into a single roller.

[0015]

According to the method of the present invention, while the metal cylinder is rotated about its central axis, the polishing tape tensioned in the longitudinal direction is applied to the outer circumference of the metal cylinder by the pressure roller. By being pressed against the surface, the outer peripheral surface is polished and the surface accuracy is improved. Here, the tape longitudinal direction to which the tension is applied is set to a direction substantially orthogonal to the central axis of the metal cylinder, and at the contact point between this polishing tape and the metal cylinder, the tension direction and the metal cylinder are contacted. Since the rotating direction of the cylindrical object is substantially the same, even if the metallic cylindrical object rotates at a high speed, there is no possibility that the polishing tape will be displaced in the width direction due to this.

Further, as the polishing roller advances, the polishing tape moves in the longitudinal direction while the processing roller rotates, so that a new polishing surface of the polishing tape comes into contact with the metal cylindrical object, and the dress etc. It is possible to prevent lowering of the polishing power without performing the above, and it is possible to satisfactorily continuously process more processed surfaces. Further, since the polishing tape does not cause a clogging of a predetermined amount or more, the resistance does not increase, and therefore, there is no fear that the abrasive grains will fall off.

Therefore, according to this method, when the above-mentioned metal cylinder is one in which processed powder is easily generated, for example, when it is made of aluminum or aluminum alloy (claim 2).
It is especially effective.

Further, in the method according to the third aspect of the present invention, as the metallic cylindrical object is transferred, the outer peripheral surface of the cylindrical object comes into contact with the abrasive tape in order from the coarsest one. Even if there is, it is possible to finally process to high surface accuracy.

In the above method, when polishing is performed only by rotating the metal cylinder, the polishing direction is one,
The protrusions on the surface of the cylindrical object are uniformly removed. However, in the method according to claim 4, the polishing tape and the pressure roller are attached to the metallic cylindrical object during the contact between the abrasive tape and the metallic cylindrical object. Since it oscillates in the direction of the central axis, it is possible to simultaneously obtain two different polishing directions (the rotational circumferential direction and the axial direction of the metal cylindrical object), and by intersecting both polishing directions, the outer peripheral surface of the cylindrical object The convex portion can be removed in a concentrated manner.

In the apparatus according to the fifth aspect, tension is applied to the polishing tape in the longitudinal direction by pulling the polishing tape fed from the feeding roller by the take-up roller, while the metal cylinder is supported by the cylinder supporting means. It is supported while being rotated. Then, the pressure roller pressed by the pressing means presses the intermediate portion of the polishing tape against the outer peripheral surface of the rotating metal cylinder, whereby the surface of the metal cylinder is polished. . Further, the take-up roller takes up the polishing tape from the feeding roller, the polishing tape moves in the longitudinal direction, and a new polishing surface is supplied to the processed surface of the metal cylinder.

Further, in the apparatus according to the sixth aspect, the outer peripheral surface of the cylindrical cylinder is brought into contact with the polishing tape in order from the coarsest one in accordance with the transfer of the metal cylindrical body by the cylindrical body supporting means, and the method according to the third aspect is the same. In addition, the outer peripheral surface of the metal cylinder is machined to high surface accuracy. Moreover, the feeding rollers for feeding the respective polishing tapes, the winding rollers, and the pressure rollers are connected to each other in the axial direction of the rollers so as to rotate coaxially, and at least the winding rollers have a common rotating shaft. Since all of the rollers rotate integrally with each other, when the common rotation shaft is driven by the winding drive means, all the rollers are driven to rotate.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

The apparatus shown in these figures comprises a cylindrical object supporting device 20 for supporting the metallic cylindrical object 10 made of an aluminum tube or the like, and a polishing device 30 for polishing the metallic cylindrical object 10. .

The cylindrical object supporting device 20 is provided with a pair of left and right rotating shafts 21 and 22 and supporting rollers 23 and 24 fixed to the rotating shafts 21 and 22, respectively.

Each of the support rollers 23, 24 is formed in a drum shape whose diameter continuously decreases from the front and rear ends toward the center, and the metal cylinder 10 is placed between the support rollers 23, 24. It is possible. Both rotary shafts 21 and 22 are arranged so as to be inclined in the vertical direction by a predetermined angle α, and both rotary shafts 21 and 22 and support rollers 23 and 24 are arranged.
Are respectively driven to rotate in the same direction (clockwise direction in FIG. 1 in this embodiment), so that the metal cylinder 1
0 is rotated along the central axis while rotating in the opposite direction (counterclockwise direction in FIG. 1) to the rotation direction of the support rollers 23 and 24.

Incidentally, the concrete structure of the cylindrical object supporting device 20 is not particularly limited, and any conventionally known device can be used as long as it rotates at least the metallic cylindrical object 10 and preferably transfers it in the central axis direction. Can be used as appropriate.

The polishing device 30 is the cylindrical support device 20.
Is provided above. The polishing device 30 includes a housing 3 having a U-shape in a side view, which is open downward and has front and rear walls.
Eight. The housing 38 supports the common rotating shaft 31, the common rotating support shaft 32, and the common rotating shaft 33, and the housing 38 has four winding rollers 34.
A, 34B, 34C, 34D, four pressure rollers 35
A, 35B, 35C, 36C and four delivery rollers 36A, 36B, 36C, 36D are stored.

The shafts 31 to 33 correspond to the cylindrical object supporting device 2 described above.
It extends in a direction substantially parallel to the central axis of the metal cylinder 10 supported by 0. The common rotating shafts 31 and 33 are located at substantially the same height and are separated from each other in the left and right directions.
8 is rotatably supported on the front and rear walls of the shaft 8 via bearings (not shown).
It is supported by the front and rear walls so as to be able to ascend and descend at a position below the common rotary shafts 31 and 33 and at an intermediate position in the left-right direction. Specifically, the longitudinal slots 38a in the longitudinal direction are formed in the front and rear walls.
And the front and rear ends of the common rotation support shaft 32 are inserted through these elongated holes 38a.

The four winding rollers 34A to 34D are arranged in this order in the axial direction of the common rotary shaft 31, and are fixed integrally to the common rotary shaft 31. A winding drive motor (winding drive means) 39 is connected to the common rotation shaft 31, and the common rotation shaft 3 is connected by the winding drive motor 39.
1 and the winding rollers 34A to 34D are integrally driven to rotate in the winding direction (clockwise direction in FIG. 1).

Similarly, the four delivery rollers 36A-3
6D is also arranged in that order in the axial direction of the common rotary shaft 33, and is integrally fixed to the common rotary shaft 33. Brake means (not shown) is connected to the common rotary shaft 33,
A braking torque T (FIG. 3) in the opposite direction is applied during rotation in the payout direction described later (when rotating in the clockwise direction in FIG. 1). It should be noted that this rotation resistance is for generating a tape tension, which will be described later, and it is also possible to increase the frictional force between the common rotation shaft 33 and its bearing, for example, without providing a braking means. The moment of inertia of the entire feeding rollers 36A to 36D including the common rotation shaft 33 may be set to be extremely large.

The four pressure rollers 35A to 35D are mounted around the common rotary support shaft 32 so as to be relatively rotatable via bearings. Both ends of the common rotation support shaft 32 are pressed downward by the elastic force of a compression spring (pressurizing means) 40 provided on the side wall of the housing 38.

Each of the feeding rollers 36A, 36B, 3
6C and 36D include polishing tapes 37A and 37, respectively.
B, 37C and 37D are wound. These polishing tapes 37A to 37D are obtained by uniformly coating fine abrasive particles on the surface of a tape made of a polyester film or the like with an adhesive or the like, and in the state where the adhered surface of the abrasive particles faces the radial outside. Feeding rollers 36A to 36D
It is wound around. In addition, these polishing tapes 37A to
As 37D, those having different fineness from each other are used, and specifically, from the polishing tape 37A to the polishing tape 37.
The number gradually increases toward D (that is, the eyes become finer).

Each feeding roller 36A, 36B, 36
Polishing tape 37A, 37 fed from C, 36D
B, 37C and 37D are pressure rollers 35A and 3A, respectively.
5B, 35C and 35D are hung from below and wound around winding rollers 34A, 34B, 34C and 34D, respectively.

That is, the longitudinal direction of each of the polishing tapes 37A to 37D is substantially orthogonal to the central axis direction of the metal cylinder 10.

Next, a method of processing the surface of the metal cylinder 10 performed by this apparatus will be described.

In the polishing apparatus 30, the common rotary support shaft 32 is pressed downward by the compression spring 40, so that the pressure rollers 35A to 35A mounted on the common rotary support shaft 32 are mounted.
35D presses the polishing tapes 37A to 37D against the outer peripheral surface of the cylindrical object 10 supported by the cylindrical object supporting device 20. Here, the take-up rollers 34A to 34D are rotationally driven integrally with the common rotary shaft 31 at a low speed (less than 0.1 rpm) in the take-up direction, and the take-out rollers 36A to 36D and the common rotary shaft 33 are driven.
Since a braking torque T acting in the direction opposite to the feeding direction acts on the roller to give a rotational resistance, each of the polishing tapes 37A to 37A.
The tension in the longitudinal direction is generated in 7D.

On the other hand, in the cylindrical object supporting device 20, by rotating both supporting rollers 23 and 24 while the metallic cylindrical object 10 is placed between the supporting rollers 23 and 24, the metallic cylindrical object 20 is rotated. 10 is rotated and transferred in the direction of its central axis (see the arrow in FIG. 2). By this transfer, the outer peripheral surface of the metallic cylindrical object 10 is brought into contact with the polishing tape 37A with coarse mesh to the polishing tape 37D with fine mesh in order while keeping the rotation state, whereby the outer peripheral surface is stepwise. Then, the surface is processed to high precision. Here, the tape longitudinal direction to which the tension is applied is substantially orthogonal to the central axis of the metal cylinder 10, and the polishing tapes 37A to 37D and the metal cylinder 10 are provided.
Since the direction of tension and the direction of rotation of the metal cylinder 10 substantially coincide with each other at the point of contact with the metal cylinder 1,
Even if 0 is rotating at a high speed, there is no possibility that the polishing tapes 37A to 37D will be displaced in the width direction due to this.

Moreover, each of the polishing tapes 37A to 37D is gradually moved in the longitudinal direction during the processing by the winding of each of the winding motors 34A to 34D, whereby the metal cylinder 10 is made.
Since a new polished surface is always supplied to the machined surface of, it is possible to prevent a decrease in the polishing power without dressing as in the conventional method, and it is possible to continuously machine more machined surfaces satisfactorily. Become. Further, since the polishing tape does not cause a clogging of a predetermined amount or more, the resistance does not increase, and therefore, there is no fear that the abrasive grains will fall off. Therefore, according to this method, even if the metal cylinder 10 is liable to generate processing powder, for example, if it is made of aluminum or an aluminum alloy, it is possible to perform good continuous processing for a long period of time.

Actually, Table 1 shows an aluminum tube (diameter 30 mm, length 250 mm) having a surface roughness of 3 μm Rmax before processing.
When the above method was carried out under the conditions shown in, the surface roughness was 0.
The aluminum tube with the polishing surface having 6 μm Rmax continuously 2
It was confirmed that 000 pieces can be processed. On the other hand, Table 1 above
When four polishing grindstones having the same counts as these were used instead of the respective polishing tapes 37A to 37D shown in Fig. 4 and the same metal cylinder 10 was rotated and fed to perform processing, 800 aluminum pipes were processed. Peeling occurred on the surface of the aluminum tube and the surface roughness exceeded 1 μmRmax, and further processing became impossible. From such experimental data, the superiority of the method of the present invention can be understood.

[0040]

[Table 1]

In the above method, the housing 38
When the position is fixed, the polishing direction is only the circumferential direction of rotation of the metal cylinder 10, and the protrusions on the surface of the cylinder are uniformly removed. By vibrating the metal cylinder 10 in the axial direction (see the arrow A in FIG. 2), two different polishing directions (the rotational circumferential direction and the axial direction of the metal cylinder 10) can be obtained at the same time. By intersecting the polishing directions and intensively removing the convex portions on the outer peripheral surface of the cylindrical object, it becomes possible to further improve the processing accuracy.

The present invention can also take the following modes.

(1) In the present invention, it is also possible to process a metal cylinder using a single polishing tape. However,
By arranging a plurality of polishing tapes as described above and contacting the metal cylinders in order from the coarse one, even if the surface accuracy of the metal cylinder before processing is very low, the surface accuracy after processing Can be dramatically improved. In this case, as in the above embodiment, the winding rollers, the pressure rollers, and the feeding roller are configured to rotate coaxially, and the winding drive motor 39 integrally rotates all the winding rollers 34A to 34D. By doing so, all the rollers can be driven by the single winding drive motor 39, and the configuration of the apparatus can be greatly simplified.

(2) In the above embodiment, the winding rollers, the pressure rollers, and the feeding rollers are connected via the shafts 31, 32, 33, respectively. The pressure rollers or the feeding rollers may be integrated into a single roller. That is, a plurality of polishing tapes may be engaged with a single roller.

(3) When a single polishing tape is used and its width dimension is substantially equal to or larger than the axial dimension of the metal cylinder 10,
No axial transfer is required.

(4) In the above embodiment, the winding roller 3
4A or the like and the pressure roller 35A or the like, or between the pressure roller 35A or the like and the feeding roller 36A or the like, a tension roller may be appropriately interposed.

[0047]

As described above, according to the present invention, a polishing tape having a longitudinal tension applied to the outer peripheral surface of a rotating metal cylinder is pressed against the outer peripheral surface of the metal cylinder by a pressure roller. And, since the tape longitudinal direction to which the tension is applied is set in a direction substantially orthogonal to the central axis of the metal cylinder, even if the metal cylinder is rotated at a high speed, the polishing tape The outer peripheral surface can be processed with high accuracy without causing a positional deviation in the width direction. Moreover, as the polishing progresses, a new tape polishing surface can be easily supplied to the metal cylinder processing surface by moving the polishing tape in the longitudinal direction while rotating the processing roller. Even if no dressing is performed, there is an effect that the lowering of the polishing force can be prevented and more processed surfaces can be efficiently and continuously processed. Further, since the polishing tape does not cause a clogging of a predetermined amount or more, the resistance does not increase, and therefore, there is no fear that the abrasive grains will fall off.

Therefore, as described in claim 2, it is possible to satisfactorily process a metal cylinder made of aluminum or an aluminum alloy, in which processed powder is easily generated.

Further, in the method according to the third aspect of the present invention, the outer peripheral surface of the cylindrical metal member is brought into contact with the polishing tape having the coarsest mesh to the polishing tape having the finest mesh in order as the metal cylinder is transferred. Even in the case of a cylindrical object whose surface accuracy is extremely low, it is possible to finally process up to high surface accuracy.

In carrying out this method, in the apparatus according to the sixth aspect, the feeding rollers for feeding the polishing tapes, the take-up rollers, and the pressure rollers are connected in the axial direction of the respective rollers to coaxially rotate. Since it is configured to rotate, and at least the take-up rollers are configured to integrally rotate about a common rotary shaft, it is easy to connect a single take-up drive means to the common rotary shaft. With such a structure, all the rollers can be rotationally driven to perform the above-mentioned polishing work, and there is an effect that the apparatus can be greatly simplified.

Further, in the method according to the fourth aspect, the polishing tape and the pressure roller are vibrated in the central axis direction of the metal cylinder during the contact between the polishing tape and the metal cylinder. By intersecting two different polishing directions (rotational circumferential direction and axial direction of the metal cylinder) to intensively remove the protrusions on the outer peripheral surface of the cylinder, it is possible to further improve the processing accuracy. is there.

[Brief description of drawings]

FIG. 1 is a front view of a surface processing apparatus for a metal cylinder according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view of the surface processing apparatus.

FIG. 3 is a cross-sectional plan view of a polishing apparatus provided in the surface processing apparatus.

[Explanation of symbols]

 10 Metal Cylindrical Object 20 Cylindrical Object Supporting Device (Cylindrical Object Supporting Means) 30 Polishing Device 31 Common Rotating Shaft 34A to 34D Winding Roller 35A to 35D Pressure Roller 36A to 36D Feeding Roller 37A to 37D Polishing Tape 39 Winding Drive Motor (Winding drive means) 40 Compression spring (pressurizing means)

Claims (6)

[Claims] 1. While rotating a metal cylinder around its central axis, tension is applied in the longitudinal direction to a polishing tape having abrasive particles adhered to its surface, and this longitudinal direction serves as the central axis of the metal cylinder. This polishing tape is pressed against the outer peripheral surface of the metal cylinder in a substantially orthogonal state by a pressure roller rotatable about an axis substantially parallel to the central axis of the metal cylinder to polish the outer surface. And, as the polishing roller progresses, the polishing tape is moved in the longitudinal direction while rotating the processing roller to change the contact point of the polishing tape with the metal cylinder. Surface processing method for cylindrical objects. 2. The surface processing method for a metal cylinder according to claim 1, wherein the metal cylinder is made of aluminum or an aluminum alloy. 3. The method for processing a surface of a metal cylinder according to claim 1 or 2, wherein a plurality of polishing tapes having different fineness are provided in the center of the metal cylinder in the order of fineness of the polishing tapes. It is characterized in that it is arranged in the axial direction and is transferred in the direction of the central cylinder while rotating the metallic cylinder around its central axis so as to contact the outer peripheral surface of the metallic cylinder in order from the coarsest polishing tape. A method for processing the surface of a metal cylinder. 4. The surface processing method for a metal cylinder according to any one of claims 1 to 3, wherein the polishing tape and the pressure roller are provided while the polishing tape and the metal cylinder are in contact with each other. Vibrating in the direction of the central axis of the metal. 5. A cylinder supporting means for supporting a metal cylinder while rotating it about its central axis, a polishing tape having abrasive particles adhered to the surface thereof, a feeding roller for feeding the polishing tape, and the polishing tape. A winding roller that winds while pulling in the longitudinal direction, a winding driving means that drives the winding roller in the tape winding direction, and a rotation roller that is rotatable about an axis substantially parallel to the central axis of the metal cylinder. A pressure roller for pressing a portion of the polishing tape between the feeding roller and the take-up roller against the outer peripheral surface of the metal cylinder, and a direction in which the pressure roller faces the metal cylinder. A pressurizing means for pressurizing the
A surface processing apparatus for a metal cylinder, wherein the longitudinal direction of the polishing tape is substantially orthogonal to the central axis of the metal cylinder. 6. The surface processing apparatus for a metal cylinder according to claim 5, wherein a plurality of polishing tapes having different meshes are provided in the direction of the central axis of the metal cylinder in order of the meshes of the polishing tapes. In order to bring the metal cylinder into contact with the outer circumferential surface of the metal cylinder in order from the coarsest polishing tape, the metal cylinder is rotated around its center axis while being transferred in the direction of the center axis. A roller of each roller is provided as a means for feeding out each polishing tape, a pair of winding rollers for winding each polishing tape, and a pair of pressure rollers for pressing each polishing tape against the outer peripheral surface of the metal cylinder. Direction and are configured to rotate about the same axis, and at least each take-up roller is configured to integrally rotate about a common rotation axis. A surface processing apparatus for a metal cylinder, wherein the winding drive means is connected to a rotary shaft.