JP2001125293A - Method of manufacturing photosensitive drum made of aluminum alloy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To subject a cylindrical pipe made of an aluminum alloy to shape working of out-of-roundness etc., necessary as a photosensitive drum and to mirror surface finishing free of surface defects by subjecting this cylindrical pipe to electrolytic composite polishing using grinding wheel having a grain size, modulus of elasticity in compressing and tensile breaking elongation in the prescribed ranges. SOLUTION: This method includes a stage of subjecting the cylindrical pipe made of the aluminum alloy to rough or intermediate polishing by electrolytic composite polishing by using the grinding wheel of 200 to 1,200 Mpa in the modulus of elasticity in compression and 1.0 to 6.0% in the tensile breaking elongation formed by bonding abrasive grains having the grain size of #80 to #220 by a resin binder. Further, the method includes the stage of subjective the cylindrical pipe made of the aluminum alloy to finish polishing by electrolytic composite polishing by using the grinding wheel of 50 to 300 Mpa in the modulus of elasticity in compression and 1.0 to 4.0% in the tensile breaking elongation formed by bonding the abrasive rains having the grain size of #320 to #600 by the resin binder. As a result, the cylindrical pipe is finished to a surface roughness of 0.1 to 2.0 μmRy and the out-of-roundness of <=25 μm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an aluminum alloy photosensitive drum used for a copying machine or the like.

[0002]

2. Description of the Related Art Generally, a photosensitive drum of a printing machine such as a copying machine or a printer is formed by mirror-finishing the outer peripheral surface of an aluminum alloy cylindrical tube having a predetermined diameter. As a method of the mirror surface processing, conventionally, for example, diamond cutting, centerless polishing, burnishing, electrolytic composite polishing, or a process in which these are appropriately combined are known.

[0003]

Among the above-mentioned conventional mirror finishing methods, in the case of diamond cutting, the processing cost is high, the productivity is low, the product yield is low, and the surface such as the surface is scratched or covered. Defects are easy to occur, dimensional accuracy is poor due to loss of roundness or bending, and the printed surface is likely to be striped due to interference fringes on the finished surface due to reflection characteristics. was there. In the case of the centerless polishing, there is a possibility that deep scratches may locally occur due to abrasive grains falling off from the grindstone, and there is a problem that even if a burnishing is performed after the polishing, the scratch is not easily eliminated. . In the case of burnishing, wrinkles and tears are involved when the cylindrical tube is pulled out, and the surface contains a defect, which causes a problem of causing a printing defect when used as a photosensitive drum. On the other hand, in the case of electrolytic combined polishing, the electrode performing the electrolytic action and the grindstone performing the polishing action act individually, and the arrangement of the plurality of grindstones with respect to the cylindrical tube may be partially biased, and surface defects such as overcasting may occur. Are likely to occur, the dimensional accuracy such as roundness is deteriorated, and the product yield is lowered. In such a conventional processing technique, the cylindrical pipe is made of an aluminum alloy and is therefore soft. Therefore, as a processing phenomenon peculiar to the aluminum material, surface defects such as peeling during covering or polishing, and surface defects such as covering are liable to occur. The quality required for drums cannot be secured at all.

The conventional grindstone used in the electrolytic combined polishing is generally a resinoid or vitrified grindstone, and has a considerably large compression modulus E (E ≧ 5000).
(MPa), it is easily clogged and continuous polishing is impossible. Further, with respect to the finishing whetstone, the elastic whetstone having a relatively large compression elastic modulus (E = 1000 MPa) has a high frequency of occurrence of scratches, does not provide good surface quality, and has a relatively low compression elasticity ( E = 5 MPa) With an elastic grindstone, the roundness is poor and the polished surface is uneven, so that the quality required for the photosensitive drum cannot be secured.

The present invention has been made in view of such a situation in the prior art. In particular, attention is paid to electrolytic composite polishing, and the outer peripheral surface of an aluminum alloy cylindrical tube is shaped to improve dimensional accuracy such as roundness. Manufacturing of photosensitive drums that ensures the quality required for OPC photosensitive drums and improves product yield by performing mirror finishing with high precision so as to prevent surface defects from occurring. The aim is to provide a method.

[0006]

Means for Solving the Problems As a specific means for achieving this object, the present invention has a particle size of from $ 80 to $ 22.
0 (particle diameter: 180 to 53 μm) is fixed with a resin binder, and a cylindrical tube made of aluminum alloy is formed using a grindstone having a compression elastic modulus of 200 to 1200 MPa and a tensile breaking elongation of 1.0 to 6.0%. Including a step of processing by electrolytic combined polishing, the particle size is from $ 320 to $ 6000 (particle size 40 to 2.0
μm) abrasive grains are fixed with a resin binder and the compression modulus is 5
0-300 MPa, tensile elongation at break is 1.0-4.0.
% Grinding process of aluminum alloy cylindrical tube by electrolytic composite polishing using a grinding wheel. After roughening or intermediate polishing of the aluminum alloy cylindrical tube by the preceding processing step, surface roughness by the subsequent processing step Is 0.1-2.0 μmRy and the final roundness is 25 μm or less.

That is, the present invention solves the problems encountered in conventional machining such as diamond cutting, and performs electrolytic composite polishing using a grindstone having a predetermined grain size, compression modulus and tensile breaking elongation as described above. By processing, it is possible to perform shape processing with improved dimensional accuracy such as roundness required for an aluminum alloy photosensitive drum and high-precision mirror processing without surface defects.

[0008] The grindstone used in the electrolytic combined polishing is as follows:
Depending on the diameter of the aluminum alloy cylindrical tube to be polished, the surface condition such as scratches and irregularities on the surface, rough or intermediate polishing processing,
The final polishing can be performed by a series of electrolytic composite polishing apparatuses, or the rough or intermediate polishing processing and the final polishing processing can be performed by separate electrolytic composite polishing apparatuses. The grain size of the grindstone can be appropriately selected within the above-mentioned numerical range according to the surface roughness required for the photosensitive drum made of an aluminum alloy.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method for manufacturing an aluminum alloy photosensitive drum according to the present invention will be described with reference to the accompanying drawings. FIGS. 1 and 2 show an example of a swing type electrolytic composite polishing apparatus, which is a vertical type but may be a horizontal type. In the drawing, reference numeral 1 denotes a cylindrical tube made of an aluminum alloy which is a material to be polished, and upper and lower ends thereof are respectively supported by a support member 5, charged by an anode, and rotated at high speed around an axis.

As shown in FIG. 2, the grindstones 2 are radially arranged on the cylindrical tube 1 from three directions along the circumferential direction of the outer surface toward the center, and these grindstones 2 are attached to and detached from the grindstone holders 7, respectively. It is attached so as to be capable of being pressed against the outer peripheral surface of the cylindrical tube 1 with a constant pressure by an actuator 8 provided on a side portion of the housing 6. In this case, the grindstone holder 7 is held by a holding frame 9 fixed to the housing 6 so as to be able to advance and retreat.

In the holding frame 9, a cylindrical frame 10 having an opening through which the grindstone 2 can advance and retreat is disposed concentrically with the cylindrical tube 1 with a required gap. And an upper end of the electrolyte passage A communicates with an electrolyte supply port 6a of the housing 6 as shown in FIG.
The lower end communicates with the electrolyte outlet 6b. Further, as shown in FIG. 2, the upper end of the opening of the cylindrical frame 10 (the cylindrical tube 1 and the grindstone 2).
(Adjacent to the contact portion) are attached with cathode electrodes 3 respectively.

Numeral 11 is a glass plate disposed on both sides of the grinding wheel holder 7 so as to sandwich the grinding wheel holder 7, and is made of another material if it is excellent in lubricity and is excellent in lubrication. But it is good.

In the electrolytic composite polishing apparatus thus constructed, the housing 6 is formed so as to be able to swing by an appropriate swinging mechanism (not shown), and the axial direction of the cylindrical tube 1 with respect to the cylindrical tube 1 which rotates at a high speed. (Up and down direction), the electrolytic solution 4 is supplied from the electrolytic solution supply port 6a, passes through the electrolytic solution passage A, and is polished by the whetstone 2. Grind.

The grindstone 2 is prepared for rough or intermediate polishing and for finish polishing. The cylindrical tube 1 is subjected to three steps of rough polishing-intermediate polishing-finish polishing or rough polishing-finish using these grindstones. It is mirror-finished through two polishing steps. The selection is made according to the manufacturing conditions of the photosensitive drum made of an aluminum alloy.

The grinding stone for rough or intermediate polishing is JIS-R60
Particle size # 46 to # 320 (particle size 3
55 to 40 μm), preferably # 80 to # 220 (particle diameter 180 to 53 μm) abrasive grains are fixed with a resin binder, and the compression modulus E is 100 to 2000 MPa, preferably 200
１1200 MPa, tensile elongation at break is 0.7８8.0.
%, Preferably 1.0 to 6.0%.

As the abrasive grains, artificial abrasives specified in JIS-R6111 can be used, that is, alumina abrasives and silicon carbide abrasives. Since aluminum itself is a non-ferrous metal, silicon carbide abrasives are often used in ordinary mechanical grinding, but silicon carbide abrasives are not particularly preferred in electrolytic combined polishing.

The reason why the grain size range of the abrasive grains is set to # 46 to # 320 (particle diameter: 355 to 40 μm) is that the productivity in electrolytic composite polishing of an aluminum alloy photosensitive drum and scratches which do not affect the finish polishing are considered. Minimize residual surface flaws and reduce surface roughness after processing to 5 to 15 μmRy
In order to

If the particle size is smaller than # 46, the particle size becomes large and a predetermined surface roughness cannot be obtained, leaving surface scratches and the like which may affect the finish polishing. On the other hand, when the particle size is larger than $ 320, the particle size becomes smaller, so the amount of grinding per unit time in electrolytic combined polishing decreases, and it takes much time to obtain a predetermined amount of grinding. Cause a drop. Preferably, the particle size is between $ 80 and $ 220.

As the resin binder, for example, resins used in general resinoid grindstones such as phenol resin, epoxy resin and urethane resin can be used.
In addition, as a method for producing a grindstone, a method in which one or more of these resin binders are used, mixed with abrasive grains and a pore-forming material, and then solidified by pressing and thermosetting of the resin binder can be adopted.

However, in the above-mentioned method of manufacturing a so-called resinoid grindstone, it is difficult to control a predetermined compressive modulus and tensile elongation at break.
It can be said that it is suitable for manufacturing a grinding wheel of MPa or more. Therefore, in order to easily obtain a predetermined compression modulus and tensile elongation at break, an improved product of a polyvinyl alcohol bond grindstone (hereinafter referred to as PVA grindstone), which is an elastic grindstone having a small compression modulus, or polyvinyl alcohol containing abrasive grains A special elastic grindstone such as a grindstone in which a polyvinyl alcohol fiber processed to an appropriate length using a fiber as a material and fixed with the above-mentioned resin binder is suitable.

In the case of the PVA grinding stone, a phenol resin,
It is possible to impregnate and solidify a PVA grindstone with a thermosetting resin such as a melamine resin to secure necessary water resistance and strength in water. When a PVA grindstone is manufactured, polyvinyl alcohol and a phenol resin are mixed in advance to form a binder, and a resin-modified PVA grindstone manufactured using the binder also has a similar effect. In the case of a grindstone using abrasive grains-containing polyvinyl alcohol fibers as a material, the abrasive grains are firmly held in the polyvinyl alcohol fibers. And, by using a kind of cushion material such as polyvinyl alcohol fiber, even if a resin having a large compression modulus is used as the resin binder itself such as phenol resin and epoxy resin, the compression modulus can be freely set at a level of 5000 MPa or less. It becomes possible to control. As the abrasive-containing fibers, synthetic fibers such as abrasive-containing nylon fibers can be used in addition to polyvinyl alcohol. Further, synthetic fibers having abrasive grains attached to the outside of the fibers can also be used.

The range of the compression modulus is 100 to 2000MP
The reason for setting a is that a grinding stone having a compression elastic modulus of less than 100 MPa cannot sufficiently exhibit the grinding action of the abrasive grains, and a grinding stone having a compression elastic modulus of more than 2000 MPa makes continuous processing impossible due to clogging. In addition, the frequency of occurrence of scratches generated during processing also increases.

The tensile elongation at break ranges from 0.7 to 8.0.
The reason is that when the tensile elongation at break is less than 0.7%,
This is because the abrasion of the grindstone increases and the processing cost increases. When the tensile elongation at break exceeds 8.0%,
This is because the grindability of the grindstone decreases and clogging is likely to occur.

On the other hand, the finish polishing grindstone will be described. This is based on the particle size defined by JIS-R6001.
220 to $ 8000 (particle size 53 to 1.2 m), preferably $ 320 to $ 6000 (particle size 40 to 2.0 m)
Is fixed with a resin binder, and the compression modulus is 10 to 5
00 MPa, preferably 50 to 300 MPa, and tensile elongation at break of 0.5 to 5.0%, preferably 1.0 to 4.0%
Use a whetstone.

In this case, the abrasive grains are also JIS-R61.
Artificial abrasives specified in 11, that is, alumina abrasives and silicon carbide abrasives can be used. As other abrasives, for example, cerium oxide, chromium oxide and the like can be used. As the finish polishing in the electrolytic combined polishing, a silicon carbide abrasive is particularly preferable. This silicon carbide abrasive is superior to an alumina abrasive such as aluminum oxide in the balance between the grindability as abrasive grains and the finished surface roughness in the finish polishing of electrolytic combined polishing.

The reason why the grain size range of the abrasive grains is set to be from 220 to 8000 is that the productivity and the surface roughness of the aluminum alloy photosensitive drum in the electrolytic combined polishing are 0.1%.
This is for setting the thickness to 2.0 μmRy.

When the particle size is smaller than # 220, the particle size becomes large, so that a surface roughness of 2.0 μmRy or less cannot be obtained stably. On the other hand, when the particle size is larger than $ 8000, the particle size is reduced, so that the grinding amount per unit time in electrolytic combined polishing is reduced, and it is often necessary to obtain the grinding amount for removing the roughness of the processed surface in the previous process. This time is required, and the productivity is reduced. Preferably, the particle size is from $ 320 to $ 6000.

In order to easily obtain a predetermined compression elastic modulus and a tensile elongation at break of the grinding wheel, a PVA grinding stone, which is an elastic grinding stone having a small compression elastic modulus, or an improved product thereof is preferable. PV
In the case of A grinding wheel, phenol resin, impregnating the PVA grinding wheel using a thermosetting resin such as melamine resin alone or in combination,
It is possible to solidify and secure necessary compression modulus and tensile elongation at break. When a PVA grindstone is manufactured, a resin-modified PVA grindstone manufactured by previously mixing polyvinyl alcohol and a phenol resin is also a grindstone having the same function.

The particle size is larger than # 220 (particle size is # 2
In PVA wheels (smaller than 20), the porosity in the wheel, ie the proportion of air in the wheel volume, is also an important factor in addition to the type, grain size and binder of the abrasive grains. In order to perform continuous polishing with less clogging using fine abrasive grains, the porosity is desirably 70% or more.

The reason for setting the range of the compression elastic modulus to 10 to 500 MPa is that, if the grinding stone has a compression elastic modulus of less than 10 MPa, the roundness of the photosensitive drum made of aluminum alloy is deteriorated and the polishing surface becomes uneven. , Compression modulus is 500MPa
This is because with a grindstone exceeding the above, the frequency of occurrence of scratches increases, and good surface quality cannot be obtained.

The range of the tensile breaking elongation is 0.5 to 5.0.
The reason is that when the tensile elongation at break is less than 0.5%,
This is because the abrasion of the grindstone is large and the processing cost increases. If the tensile elongation at break exceeds 5.0%, the grindability of the grindstone decreases and clogging easily occurs, and dimensional accuracy such as roundness and the like is increased. Is reduced.

[Embodiment] With respect to the method of manufacturing the aluminum alloy photosensitive drum according to the present invention, a polishing experiment was carried out using the electrolytic combined polishing apparatus. At this time, the material to be polished, the polishing conditions, the measuring device and the like are as follows. Material to be polished: 6000 series aluminum alloy cylindrical tube (diameter 30)
mm) Polishing device: Oscillating electrolytic composite polishing machine Applied voltage: Both rough polishing and finish polishing are constant. Grinding stone pressing force: Both rough polishing and finish polishing are constant. Electrolyte solution: Sodium nitrate aqueous solution for both rough polishing and finish polishing. Total: SURFCOM (130A) Tokyo Seimitsu whetstone physical property measuring machine (compression test, tensile test): Tensilon (UCT-5T) A & D Co., Ltd. A & D Co., Ltd. Whetstone physical properties Sample adjustment condition: immerse sample in water at 25 ° C for 48 hours After measurement

The types of grindstones used are as follows. (1) Water-resistant PVA grindstone A A pore-forming material such as abrasive grains and starch, a catalyst such as formaldehyde and hydrochloric acid are added to an aqueous solution of polyvinyl alcohol, mixed and stirred, then put into a predetermined mold, and then reacted for a predetermined time (for example, 45 ° C., 48 hours), and the polyvinyl alcohol is solidified by the acetal reaction of the polyvinyl alcohol. The grindstone formed in this process is usually called a PVA grindstone, and the binder is acetalized polyvinyl alcohol. The water-resistant PVA grindstone A is obtained by impregnating a thermosetting resin such as a melamine resin or a phenol resin into the PVA grindstone and curing the PVA grindstone so that the PVA grindstone does not extremely soften even in water. (2) Water-resistant PVA grinding stone B A grinding stone in which a water-resistant resin such as polyvinyl alcohol and phenol resin is used in combination in a PVA grinding stone manufacturing process. When the concentration of the water-resistant resin used in combination is high, the step of impregnating the melamine resin or the like in the subsequent step can be omitted. (3) A fiber-solidifying grindstone containing abrasive grains A polyvinyl alcohol fiber containing abrasive grains is used for 5 to 15
A grindstone cut to an appropriate length of about mm, mixed with an epoxy resin, polyurethane resin, etc., stirred, placed in a mold, and subjected to press and heat curing treatment. Thus, the binder of the grindstone is a mixture of polyvinyl alcohol and a thermosetting resin. When mixing the cut fibers and the resin, abrasive grains may be additionally mixed as necessary. In addition, depending on the type of resin to be used, after the cut fibers are put in a mold, a resin diluted with water or a solvent may be poured into the mold to cause a solidification reaction.

Tables 1 and 2 show the test results of the electrolytic combined polishing. Table 1 shows the case of rough polishing, and Table 2 shows the case of finish polishing.

[0035]

[Table 1]

[0036]

[Table 2]

From the test results, when the case of rough polishing shown in Table 1 was examined, Examples 1, 4, 6, 8 and the like showed good results. What is common to these is that the grain size of the grindstone is
♯ 220, elastic compressibility is 200-1
It is within the range of 200 MPa, and the tensile elongation at break is within the range of 1.0 to 6.0%.

Therefore, regarding the grain size of the grinding wheel, {80-}
Although the range of 220 is good and other factors are complicatedly involved, it cannot be said unconditionally. However, if it is out of this particle size range, it can be seen that a problem occurs. For example, $ 46 in the third embodiment
In the case of, the surface of the grindstone is slightly clogged, and the grinding power is insufficient. In the case of # 36 in Example 2, the surface roughness becomes slightly coarse because the particle diameter increases, In the case of # 600 of Example 9, the processing efficiency is poor because the particle diameter is small.

With respect to the compression modulus, 200 to 1200
When the range of MPa is good, and in the case of 80 MPa in Example 3, the grinding efficiency of the abrasive grains cannot be sufficiently exhibited, so that the processing efficiency is inferior. In the case of 2300 MPa in Example 5, the grinding wheel clogging may occur. Therefore, it was found that continuous processing was impossible. In the case of 1200 MPa in the second embodiment,
Although the surface roughness was slightly rough, no clogging occurred and the grinding action was good.

The tensile elongation at break is 1.0 to
If the range of 6.0% is good, and if it is less than 1.0%, it is expected that the wear of the grindstone will increase and the processing cost will increase. If it exceeds 6.0%, for example, Example 7 In the case of 9.8%, the grindability of the grindstone is reduced and clogging is likely to occur. Clogging occurred at 1.8% in Example 5 because of a high compression modulus (2300MP).
It is considered that this was affected by a).

Next, when examining the case of finish polishing shown in Table 2, Examples 5, 7, and 12 showed good results, and Example 9 showed generally good polishing, although there was some unevenness in polishing. In each case,
Surface roughness after processing is 0.1 to 2.0 μmRy
And the roundness was finished to 25 μm or less. The common feature of these is that the grain size of the grinding stone is $ 320.
~ 6000, compression modulus is 50 ~
It is within the range of 300 MPa, and the tensile elongation at break is within the range of 1.0 to 4.0%.

Therefore, regarding the grain size of the grinding wheel, $ 320
A range of ~ $ 6000 is preferred. In the case of # 220 of Example 1 and Example 3, there are some traces and uneven polishing,
In the case of # 120 of Example 2 and Example 4, the locus and polishing unevenness were conspicuous, and the surface roughness was poor. As described above, the surface roughness after processing is preferably in the range of 0.1 to 2.0 μmRy. However, when the particle size is small, the particle size increases, so that a surface roughness of 2.0 μmRy or less is obtained. I can't. When the particle size is large, such as $ 12000 in Example 6, the particle size is small, so the grinding amount per unit time in electrolytic combined polishing is reduced, and the grinding amount for removing the roughness of the pre-processed surface is required. Takes a lot of time, and causes a decrease in productivity.

Regarding the compression modulus, 50 to 300MP
a is preferable, and the compression modulus is 40 M as in Example 10.
In the case of Pa, roundness failure occurs, unevenness occurs on the polished surface, and the compression elastic modulus is 300 as in Examples 1 and 2.
If it exceeds MPa, the frequency of occurrence of surface defects such as locus and unevenness increases, and good surface quality cannot be obtained. In addition, in the case of 50 MPa in Example 6, the reason why the grinding force was insufficient and the pre-processed surface could not be removed was considered to be due to the particle size of 12000 and the small particle size (1 μm).

The tensile elongation at break is 1.0 to
The range of 4.0% is preferable. In the case of 0.2% in Example 8, the amount of wear of the grindstone increases, the processing cost increases, and in the case of 7.5% of Example 10, It was also found that the grinding power of the grindstone was reduced, clogging was likely to occur, and dimensional accuracy such as roundness was also reduced. Note that, in the above examples, no particular difference was recognized regarding the type of the grindstone.

[0045]

As described above, according to the method of the present invention, the outer peripheral surface of an aluminum alloy cylindrical tube is electrolytically polished using a grindstone in which the grain size, compression modulus and tensile elongation at break are respectively specified. By processing, the surface is peeled,
It is possible to obtain a highly accurate processed product that satisfies the surface roughness and roundness required for the photosensitive drum without causing surface defects such as overcasting, and has the excellent effects of improving the product yield. Play.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing an example of an electrolytic combined polishing apparatus for implementing a method for manufacturing an aluminum alloy photosensitive drum according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Aluminum alloy cylindrical tube 2 ... Grinding stone 3 ... Cathode electrode 4 ... Electrolyte 5 ... Support member 6 ... Housing 7 ... Grinding stone holder 8 ... Actuator 9 ... Holding frame 10 ... Cylindrical frame 11 ... Glass plate

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masafumi Tomita 14-1 Nagafuminatocho, Shimonoseki City, Yamaguchi Prefecture F-term (reference) 2N068 AA52 AA54 AA58 AA59 CA32 EA07 FA25 3C059 AA02 AB01 GB01 GC01 HA17 3C063 AA02 AB07 BA05 BA08 BB01 BB03 BB04 BB07 BB25 BC03 BD09 BH01 BH09 CC19 DD02 EE01 EE40 FF23

Claims (3)

[Claims] (1) a particle size of # 80 to # 220 (particle size of 180 to
53 μm) abrasive grains are fixed with a resin binder, the compression elastic modulus is 200 to 1200 MPa, and the tensile breaking elongation is 1.0.
A method for manufacturing an aluminum alloy photosensitive drum, comprising a step of processing an aluminum alloy cylindrical tube by electrolytic combined polishing using a grinding stone of up to 6.0%. 2. A particle size of from # 320 to # 6000 (particle size of 40
２．０2.0 μm) are fixed with a resin binder, the compression modulus is 50 to 300 MPa, and the tensile breaking elongation is 1.0.
A method for manufacturing an aluminum alloy photosensitive drum, comprising a step of processing an aluminum alloy cylindrical tube by electrolytic combined polishing using a grinding stone of up to 4.0%. 3. An aluminum alloy cylindrical tube is roughened or intermediately polished by the processing step described in claim 1, and then has a surface roughness of 0.1 to 2.0 μmRy and roundness by the processing step described in claim 2. Is characterized by being finish-polished to 25 μm or less,
Manufacturing method of aluminum alloy photosensitive drum.