KR100753370B1 - Manufacturing method for tube of organic photo conductor drum and product thereof - Google Patents

Abstract

A manufacturing method of a tube for an organic photo conductor drum is provided to reduce a structural difference between a welded portion and a non-welded portion, remove the welding line, and maximize the productivity by fully annealing and drawing a tube type weldment made from an aluminum alloy, thereby manufacturing a welding type tube body. A manufacturing method of a tube for an organic photo conductor drum comprises: an aluminum alloy ingot rolling step(S10) of manufacturing a rolled product by cold rolling a 3000 series low melting point aluminum alloy workpiece in order to form a directional structure through precise finish processing and drawing; a high frequency induction heating welding step(S20) of welding the rolled product by a high frequency induction heating process for the low melting point aluminum alloy workpiece to manufacture a tube type weldment; a full annealing step(S30) of performing structure recrystallization of the weldment at a temperature of 410±10 degrees for 2 hours to manufacture a soft weldment; and a drawing step(S40) of drawing the soft weldment one time to manufacture a drawn product of which tube wall has a reduced thickness to satisfy the standard for the organic photo conductor drum.

Description

Manufacturing method for tube for photosensitive drum and its manufacture {Manufacturing method for tube of Organic Photo Conductor drum and product}

1 is a schematic view for explaining the configuration of a toner cartridge for a general laser printer;

2 is a flowchart illustrating a method of manufacturing a cylindrical support for a photosensitive drum according to the prior art;

3 is an enlarged cross-sectional view of an aluminum alloy welding pipe according to another prior art,

4 is a flowchart illustrating a method of manufacturing a tube for a photosensitive drum according to an embodiment of the present invention;

5 is a process chart for explaining the tube body manufacturing equipment used in the method for manufacturing a tube for the photosensitive drum shown in FIG.

6 is a perspective view and a partially enlarged view of a welded tube body manufactured by the tube body manufacturing equipment related to the photosensitive drum shown in FIG.

<Description of the symbols for the main parts of the drawings>

100: tube body manufacturing equipment 110: tube

120: welding apparatus 130: heat treatment apparatus

140: drawing device 150: sizing and finishing device

The present invention relates to a method for producing a tube for a photosensitive drum, and a product thereof, and more particularly, to the strength and hardness of the hollow body by the conventional production method of casting, injection, extrusion, etc. using a high frequency induction heating welding method The present invention relates to a method for producing a tube for a photosensitive drum and a product thereof having excellent quality characteristics such as productivity, manufacturing speed, price, manufacturing thickness, and eccentricity.

In general, laser printers such as laser beam printers (LBPs), fax machines, and copiers use toner as a developer and plain paper. Lasers, light emitting diodes (LEDs), liquid crystal shutters, etc. As a light source, printing or copying is performed by an electro-photographic process.

Referring to the general configuration of the laser printer toner cartridge shown in FIG. 1, a toner hopper, a wiper blade, a recovery blade, storing a toner made of carbon and iron powder, and having a stirring device A cartridge housing (1) having a waste chamber or the like and having a pickup roller (3) disposed on the outside for feeding the paper (2); A magnetic roller (4) which serves to pull the negatively charged toner out of the toner hopper but has a doctor blade disposed close to an outer circumferential surface to adjust the amount of toner to be raised; When the exposure is performed as formed in the adjacent position of the magnetic roller 4 and the laser beam shoots an image such as a character or an image to be printed on the surface, the electrostatic force difference from the magnetic roller 4 only in the exposed portion thereof. A photosensitive drum 5 (OPC Drum: Organic Photo Conductor Drum) which causes toner to be buried therein; It is installed so as to be engaged on the outer peripheral surface of one side of the photosensitive drum (5) has a negative charge (-) from the high-voltage transformer to have a PCR (6: Primary Charge Roller) to charge the photosensitive drum (5).

On the other hand, TCR (7: Transfer Charge Roller) disposed on the other outer circumferential surface of the photosensitive drum 5 bears a positive charge on the opposite side of the paper 2, so that the toner charged on the photosensitive drum 5 Transfer to the surface of 2). That is, the toner on the surface of the photosensitive drum 5 having negative charge is moved toward the paper 2 by the TCR 7 with positive charge.

The paper 2 on which the toner is transferred is passed between the heat roller 8 and the rubber roller 9 assembly to be fusing.

Here, the rubber roller (9) is a lower fixing roller (Lower Fuser Roller) for pressing the paper toward the heat roller (8), the heat roller (8) is a built-in heating element to melt and adhere the toner to the paper and teflon (teflon) on the surface ) Upper Fuser Roller with coating.

The photosensitive drum 5 according to the prior art comprises: a cylindrical support for a photosensitive drum made of aluminum having a predetermined space portion therein; A photosensitive layer made of various photosensitive materials coated on the surface of the cylindrical support for the photosensitive drum to change electrical properties by the laser beam; The photosensitive drum 5 is composed of a gear member fitted to the end of the cylindrical support for the photosensitive drum so that the photosensitive drum 5 can be rotated inside the toner cartridge.

As shown in FIG. 2, a method of manufacturing a cylindrical support for a photosensitive drum according to the related art includes a billet manufacturing step S1; An extrusion step S2; Drawing step S3 4 to 5 times; It consists of a sizing step (S4).

Billet manufacturing step (S1) is a step for producing an extruded material, such as billet (billet) so that the aluminum alloy can be mounted on the container of the single-acting or double-acting, direct or indirect extrusion machine.

Extrusion step (S2) is the diameter of the extruded material of the billet manufacturing step (S1) relatively larger than the diameter specification of the support, and the thickness of the tube wall relatively thicker than the thickness specification of the support (for example 0.65 mm) (Example: 3mm) This step is to produce a hollow extrusion member.

Here, the reason for extruding the diameter of the hollow extruded member or the tube wall thickness thereof thicker than that of the cylindrical support for the final photosensitive drum is that the plurality of connecting the center die and the outer die as a hollow shape ( Example: This is due to the characteristics of the extrusion die consisting of three center die holders and the quality of the photosensitive drum.

That is, when the extruded material passes through the cross-sectional area of the extrusion die and is processed into a hollow extruded member, the cross section of the hollow extruded member is formed with a processing line as many as the number and spacing of the center die holder, such as aluminum alloy extrusion This is because at least 3 mm of spacing between the center die and the outer die must be maintained to minimize the machining line in the material.

Based on the quality of the photosensitive drum, there should be no processing lines, spots, stains, etc. on the side end, outer surface or section of the tube to be recognized as product-free. This is because it can be used as a support.

The drawing step S3 is performed 4 to 5 times through the extrusion step S2 through a hollow extruded member having a relatively thick pipe wall thickness of 3 mm and having a flow line several times, for example, 4 to 5 times. The multi-step drawing process is used to make hollow drawing products with a thickness of 0.7 mm.

For example, in one drawing process, the hollow extruded member having a tube wall thickness of 3 mm is processed into a primary hollow drawn product having a tube wall thickness of 2 mm. After that, the first hollow drawn product is subjected to stepwise drawing process twice, three times, four times, and five times, so that the wall thickness of the primary hollow drawn product is from 2 mm to 1.5 mm, 1.2 mm, It becomes a hollow drawn product reduced in stages, such as 0.8 mm and 0.7 mm.

This multi-step drawing is inevitably due to the process reason of drawing after extrusion in the prior art.

That is, while the tube wall thickness that can be manufactured to the maximum thickness through extrusion is 3 mm, the tube wall thickness that is desired in the technical specification of the photosensitive drum is 0.65 mm, so that the relatively thick tube wall thickness of the hollow extruded member can be obtained by conventional drawing. This is because the target dimensions presented in the technical specification cannot be directly reduced, but must be reduced in multiple stages in consideration of the reduction ratio in the drawing process.

If the tube wall thickness is excessively lowered without considering the cross-sectional reduction rate of the hollow extruded member, it is because the hollow extruded member itself is cut when it reaches a certain limit according to the increase in the drawn stress, and thus the drawing process is impossible.

The sizing step (S4) is a step of producing a cylindrical support for a photosensitive drum having a diameter of 0.65 mm by passing a hollow drawn product having a tube wall thickness of 0.7 mm through a sizing roll, a straightening roll, and the like.

After the cylindrical support for the photosensitive drum is manufactured, the photosensitive drum is finally completed through conventional surface processing, electrophotographic organic photosensitive member coating, and gear member assembly.

However, the manufacturing method of the cylindrical support for the photosensitive drum according to the prior art has a high rate of product defects because the hollow extruded member is drawn out in multiple stages, and in terms of manufacturing speed, it is about 10 m / min and about 1 ton per day. It has a disadvantage due to inefficient productivity.

In addition, the manufacturing method of the cylindrical support for a photosensitive drum according to the prior art has the disadvantages of low strength and hardness, relatively high price, and eccentricity according to the characteristics of the extruded product.

On the other hand, as shown in Figure 3, in the other prior art aluminum alloy high frequency induction heating welding with a high eccentricity of the manufacturing speed is about 100m per minute and the manufacturing thickness is thin, but the strength and hardness are high, but the surface is uneven by the welding bead wire There is a pipe manufacturing method.

If the cylindrical support 5a is manufactured by a high frequency induction heating weld pipe manufacturing method, the appearance of the cylindrical support 5a may be similar to that of the extruded product requiring the multi-step drawing process described above through highly precise surface processing. Although the same can be produced, a weld line 5d of a relatively thin and sharp size (e.g. 30 to 50 m) or a thick line (e.g. 0.5 mm to 2 mm) (e.g. Not very difficult to remove or reduce).

In addition, the cylindrical support 5a, such as a simple high frequency induction heating welding pipe, has a large tissue difference, for example, a hardness difference between the welded portion 5b and the non-welded portion 5c, based on the welded line 5d, resulting in a photosensitive drum product. It can not be used as a cylindrical support for the photosensitive drum because it is less than the specification, in particular, even if the heat treatment based on the weld pipe, as shown in the following [Table 1], [Table 2], the conventional cylindrical support (5a) has a hardness difference It is relatively larger than the present invention, and defects such as welding lines are generated.

In addition, the cylindrical support 5a may have a spot or stain invisible to the inside of the epidermis due to the presence of tissue crystals in the welding process, so that the cylindrical support 5a may not be suitable for the photosensitive drum. Has the disadvantage of being.

Meanwhile, in the stainless steel pipe industry, in order to manufacture high quality products, heat treatment processing (eg, annealing), etc., is performed under specific temperature and time conditions in order to produce high quality products. Since different structures and properties exist, it is impossible to manufacture a cylindrical support for a photosensitive drum by a general aluminum alloy pipe manufacturing method or a stainless steel pipe manufacturing method.

For example, A3003 aluminum alloy has excellent extrusion processability and corrosion resistance, but has a disadvantage of relatively poor weldability compared to 5000 series aluminum alloys. Therefore, A3003 aluminum alloy is hard to be processed into a product suitable for a photosensitive drum after fabrication. It is true.

In fact, most of the conventional cylindrical support for photosensitive drum is being manufactured as a multi-ply drawn product after extruding extruded materials such as A3003, A1100, etc. in the aluminum alloy, the industrial aspect, which is expensive in the manufacturing economy in Korea, Most of them depend on imports due to the technical aspects of low melting point welding technology and processing technology.

The present invention has been made to solve the problems of the prior art as described above, after producing a tubular weldment of aluminum alloy material by high-frequency induction heating welding for low-melting point aluminum alloy material to perform complete loosening and one-time drawing process By manufacturing the welded tube body, it is possible to reduce or make a very similar tissue difference between the welded portion and the non-welded portion, to remove the weld line, to increase the production speed and to lower the manufacturing price, thereby maximizing productivity. It is to provide a method for producing a tube for the photosensitive drum.

In addition, another object of the present invention is to be competitive in terms of productivity and manufacturing price, small eccentricity, weld line is removed, can cope with the photosensitive drum product specifications, there is little hardness difference among the tissue difference, pipe wall thickness To provide a product manufactured by the method for producing a tube for a photosensitive drum with excellent strength and hardness while being thin.

According to the present invention for achieving the object as described above, the aluminum alloy ingot rolling step of cold rolling 3000 series low melting point aluminum alloy material to produce a rolled material in order to form a directional structure according to the precise finish processing and stretching Wow; A high frequency induction heating welding step of welding the rolled material by a high frequency induction heating welding method for a low melting point aluminum alloy material to produce a tubular weldment; A complete loosening step of fabricating softened welds by performing tissue recrystallization at a temperature of 410 ± 10 ° C. for 2 hours; It is achieved by a method for producing a tube for a photosensitive drum, and its manufacture, characterized in that it comprises a drawing step of manufacturing the drawn material by reducing the thickness of the tube wall to meet the specifications for the photosensitive drum by drawing the softening weld once.

In addition, according to the present invention, after the drawing step, the sizing step to pass through the sizing roll, the calibration roll and cut the length to meet the photosensitive drum specifications to produce a welded tube body; A photosensitive layer forming step of forming an electrophotographic organic photosensitive layer by a dry coating method after performing diamond polishing or electropolishing on the outer circumferential surface of the welded tube body; It is preferable to further include a gear member assembly step of completing the photosensitive drum by assembling the plastic gear and the finishing member corresponding to the toner cartridge at both ends of the tube body on which the organic photosensitive layer is formed.

In the following, with reference to the accompanying drawings, a preferred embodiment of the method for producing a tube for a photosensitive drum according to the present invention and its preparation will be described in detail.

In the drawings, Figure 4 is a flow chart for explaining a method of manufacturing a tube for the photosensitive drum according to an embodiment of the present invention, Figure 5 is a tube body manufacturing equipment used in the manufacturing method of the tube for the photosensitive drum shown in FIG. Figure 6 is a process diagram for explaining, Figure 6 is a perspective view and a partially enlarged view of a welded type tube body manufactured by the tube body manufacturing equipment related to the photosensitive drum shown in FIG.

As shown in Figure 4, the manufacturing method of the tube for the photosensitive drum of the present invention aluminum alloy ingot rolling step (S10) and; High frequency induction heating welding step (S20); Complete loosening step (S30); Drawing step (S40); Sizing step (S50); A photosensitive layer forming step (S60); As the gear member assembly step (S70) is performed sequentially, a product such as a photosensitive drum of an apparatus (eg, a laser printer, a fax machine, a copier, etc.) that performs printing or copying related to an electro-photographic process is manufactured. .

The aluminum alloy ingot rolling step (S10) is an ingot form of 3000 series low melting point aluminum alloy material (for example, A3003) within 0.3t to 0.8t in order to form a precise structure and a directional structure according to stretching. Rolled products in the form of sheet or sheet are produced by cold rolling to any one selected sheet thickness, where 1t means 1 mm.

The cold rolled product thus produced has crystals of a new shape having directivity, and thus has a relatively large strength and hardness compared to an extruded product.

For ease of explanation, the plate thickness of the rolled product is selected to 0.8t to be described in the following description.

The rolled product of the aluminum alloy ingot rolling step (S10) is provided to the tube body manufacturing equipment related to the photosensitive drum, which will be described below by winding a strip in the form of a coil.

The high frequency induction heating welding step (S20) is a step of manufacturing the tubular weldment through cutting, cooling, cutting, etc. after welding the rolled material with a basic welding material by a high frequency induction heating welding method for a low melting point aluminum alloy material.

That is, in the high-frequency induction heating welding step (S20), the tube manufacturing apparatus provided in the tube body manufacturing equipment makes the rolled product into a pipe shape through a general tube manufacturing process.

Thereafter, in the latter part of the tube manufacturing process, the high-frequency induction heating welding device for the low melting point aluminum alloy material is continuously selected to be welded to each other continuously in a range of 400㎑ to 600 유지 while maintaining the non-angle angle. Weld to the output value of.

Subsequently, after removing the weld bead on the inside and the outside of the welded portion by using a mandrel method or a general cutting method, it is cooled to remove the welding stress and the cutting stress, and eventually, a predetermined length (for example, 6 m to 10 m) to make a tubular weldment.

In this case, the tubular weldment may have any one diameter selected from 15 mm to 50 mm in diameter and a predetermined pipe wall thickness (for example, 0.3 t to 0.8 t) or more preferably 0.8 t for each tubing process.

The tubular weldment of the present invention thus produced has a high quality welding quality such as relatively good brittleness and solid durability, and has an extremely thin tube wall thickness, i.e., 0.8 t, compared to conventional extruded products (eg, tube wall thickness of 3 mm).

In the complete loosening step (S30), it is preferable to fabricate the softened welded material by performing a recrystallization of the tubular weldment at a temperature of 410 ± 10 ° C. for 2 hours by a conventional heat treatment apparatus capable of performing a complete loosening process. Do.

In the drawing step (S40), the softened weldment is drawn out by using a drawing device equipped with a drawing die capable of performing processing by any one selected from a section reduction rate of 15% to 20%. Here, the softened weldment is drawn out, such as a pipe wall thickness of 0.65 ± 0.01 t.

In the sizing step (S50), the drawn material is passed through a sizing roll, a straightening roll, and the like, and the length is cut in accordance with the photosensitive drum standard to produce a welded tube body having a tube wall thickness and a length corresponding to the photosensitive drum standard.

Here, when comparing with reference to Figure 3 showing the prior art and Figure 6 related to the present invention, the weld-type tube body has no weld line or significantly reduced compared to the conventional compared to the conventional high frequency induction heating welding. That is, the hardness difference between the welded portion and the non-welded portion and the weld line are reduced or removed during the drawing step S40 and the sizing step S50 after the complete loosening step S30.

In order to prove this, A3003 aluminum alloy was used, but the first group of related art specimens which performed only complete annealing after general high frequency induction heating welding, that is, specimen A- Prepare 1, B-1, C-1, and D-1.

In addition, as the same aluminum alloy, aluminum alloy ingot rolling step (S10), high frequency induction heating welding step (S20), complete loosening step (S30), drawing step (S40) and the sizing step (S50) Prepare a second group of invention related specimens, namely specimens A-2, B-2, C-2, D-2 in the drawn state.

As the test conditions, all of the A3003 aluminum alloys are used in the same manner as shown in Table 1 below, and all of them are also hourly (30 minutes / 1 hour / 2 hours / 4 hours) at 410 ± 10 ° C. as in the complete annealing process. After heat treatment with furnace, it is cooled and air-cooled by furnace cooling to 200 ℃ (about 2 hours). Then, the Vickers hardness is measured for each of the welded and non-welded portions at each of the three measuring points, and then the average value is calculated.

Vigus hardness measurement results of the verification experiment is shown in [Table 2].

As shown in [Table 2], the specimens of the second group related to the present invention have excellent welding quality because there is almost no hardness difference between each welded portion and the non-welded portion, and the hardness difference of the first group related to the prior art is welded. There was a significant difference between the stomach and the non-welded area, indicating that the weld quality was inferior. In the histological examination, the specimen of the second group was found to have the weld line removed.

In particular, when the heat treatment such as complete loosening is performed for too short (for example, 30 minutes) or for a long time (for example, 4 hours), the welded and non-welded parts are both hardened, so in the present invention, the welded material is The specimen C-2, which had been completely annealed at 410 ± 10 ° C for 2 hours, showed a uniform hardness difference while increasing hardness and strength compared to other specimens, and therefore, it was considered to meet the technical specifications of the photosensitive drum.

For example, the hardness difference of the specimen C-2 is 1.92 corresponding to any one selected from 0.13 to 1.92 based on Vickers hardness, but may be suitably used for the photosensitive drum because the hardness and strength are larger than those of the other specimens.

Meanwhile, the photosensitive layer forming step (S60) is performed by diamond polishing or electropolishing on the outer circumferential surface of the welded tube body so as to correspond to the photosensitive drum technical specification, and then using an ordinary dry coating method for an electrophotographic organic photosensitive layer. To form.

Finally, in the gear member assembly step (S70), the plastic gear and the finishing member corresponding to the toner cartridge are assembled at both ends of the tube body on which the organic photosensitive layer is formed to complete the photosensitive drum.

Hereinafter, the manufacturing apparatus used in the method for manufacturing the tube for the photosensitive drum of the present invention based on the tube body manufacturing equipment.

As shown in Figure 5, the tube body manufacturing facility 100 has a tube 110 to pipe the shape of the low melting point aluminum alloy material of the plate thickness 0.8t.

Here, the tube 110 is uncoiler (111: uncoiler), break pass roll (112: break down pass roll), side roll (113: side roll), pin pass roll (114: fin pass roll) in sequence It serves to form a rolled article 194 formed by arranging the strip cross section in a hollow step by arranging.

Thereafter, the rolled product 194 is a high-frequency induction heating welding device 120 (hereinafter, 'welding device 120') for a low melting point aluminum alloy material while maintaining a non-angle angle (vee angle) in the latter part of the tube manufacturing process. Passing through, the tube is welded to the basic weldment 195 having a thickness of 0.8t.

Here, the welding device 120 is any one selected within the range of 400㎑ to 600㎑ after seam guide roll 121 for guiding the rolled material 194 supplied while maintaining the non-angle angle. Impeder 122, induction coil 123 and squeeze roll 124 are arranged to perform welding with the output value, cutting device 125, cooling device 126, pipe cutting device 127 Consists of

That is, the basic weldment 195 includes a cutting device 125 for removing weld beads such as a mandrel pipe welding bead removing device (Patent No. 531101) or a general bead cutting device devised by the present applicant; Individual tubular weldments 196 are formed by the cooling device 126 and the tube cutting device 127 to remove the welding and cutting stresses.

The tubular weldment 196 passes through the heat treatment apparatus 130 for complete loosening of the tube body manufacturing facility 100 to become a softened weldment 197.

To this end, the heat treatment apparatus 130 is provided with a heat treatment furnace 132 for complete loosening between the inlet and outlet with the conveyor belts (131, 133).

Here, the complete annealing heat treatment furnace 132 may uniformly maintain any one set temperature (eg, 410 ± 10 ° C.) selected at a temperature of 400 ° C. to 600 ° C. for at least 30 minutes to 6 hours. It is preferable to have a.

By this heat treatment apparatus 130, the softened weldment 197 passes through the drawing apparatus 140 for one-time drawing process, and is processed as the drawing material 198 which has a wall thickness of 0.65 +/- 0.01t.

The drawing device 140 includes a drawing die 141 capable of performing processing with any one selected from a section reduction rate of 15% to 20%; Consists of a drawer 142 coupled to provide a bar draw processing force.

The drawn material 198 exiting the drawing device 140 becomes the tube body 199 before cutting through the sizing and finishing device 150 and is then cut by the cutting device 153 to expose the photosensitive drum. It is completed as a welded tube body 200 having a specification for use.

Here, the sizing and finishing device 150 is composed of a sizing roll 151, a straightening roll 152, a cutting device 153, and a complete processing device for removing burrs (not shown) used in a typical pipe forming process. It is.

As shown in FIG. 6, the completed welded tube body 200 has almost no hardness difference between the welded portion 201 and the non-welded portion 202, and the welded line is removed.

The welded tube body 200 is a product having a hardness difference between any one welded portion 201 and the non-welded portion 202 selected from Vickers hardness standards based on 0.13 to 1.92, and the photosensitive layer forming step as described above ( Through the step S60 and the assembly of the gear member (S70) is manufactured and completed as a photosensitive drum.

The method of manufacturing the tube for the photosensitive drum of the present invention is a welding type having high hardness and high strength while having a relatively thin pipe wall thickness through a single drawing process that can eliminate the weld line and the like economically after completely unwinding the weld material having a relatively thin pipe wall thickness. It is effective to mass-produce the tube body economically.

In addition, the manufacturing method of the tube for the photosensitive drum of the present invention provides a high-quality welded tube body that can cope with the technical specifications of the photosensitive drum through the welding technology, together with the economical aspect to significantly shorten the expensive drawing process by one time There is an advantage to manufacture.

In addition, the manufacturing method of the tube for the photosensitive drum of the present invention can significantly reduce the generation of defect rate by reducing the existing four to five times the draw process, there is an advantage that can be expected to productivity according to the process shrink.

In addition, the product manufactured by the method for manufacturing a tube for the photosensitive drum of the present invention is softened and the structure is uniform through the drawing step after complete loosening, so the eccentricity is very good, the strength and hardness by the welding properties, Compared with general welded products, there is almost no hardness difference between welded parts and non-welded parts, and the product defect rate can be drastically reduced compared to existing extruded products, and manufacturing speed, productivity, and price have competitive advantages.

The technical spirit of the present invention has been described above with reference to the accompanying drawings, but this is by way of example only for describing the best embodiment of the present invention and not for limiting the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (6)

In the method for producing a tube for the photosensitive drum, An aluminum alloy ingot rolling step of cold rolling a 3000 series low melting point aluminum alloy material to form a rolled structure for forming a directional structure according to precise finishing processing and stretching; A high frequency induction heating welding step of welding the rolled material by a high frequency induction heating welding method for a low melting point aluminum alloy material to produce a tubular weldment; A complete loosening step of fabricating softened welds by performing tissue recrystallization at a temperature of 410 ± 10 ° C. for 2 hours; And a drawing step of drawing the softened welded material once to produce a drawn material having a reduced tube wall thickness in accordance with a standard for a photosensitive drum. The method of claim 1, In the rolling step, the 3000 series low-melting-point aluminum alloy material is A3003, the thickness of the rolled sheet is any one selected from 0.3t to 0.8t of the tube manufacturing method for a photosensitive drum. The method of claim 1, In the drawing step, the softening welds are drawn by a drawing device equipped with a drawing die that can be processed to any one selected from the section reduction rate of 15% to 20%. The method of claim 1, After the drawing step, passing the drawn material through the sizing roll, straightening roll and cutting the length according to the photosensitive drum standard to produce a welded tube body; A photosensitive layer forming step of forming an electrophotographic organic photosensitive layer by a dry coating method after performing diamond polishing or electropolishing on the outer circumferential surface of the welded tube body; And a gear member assembling step of assembling the plastic gear and the finishing member corresponding to the toner cartridge at both ends of the tube body having the organic photosensitive layer formed thereon to complete the photosensitive drum. In the article manufactured by the manufacturing method of the tube for photosensitive drums of Claim 1, Tube for the photosensitive drum, characterized in that it comprises a welded tube body made of A3003 material at least after the complete annealing heat treatment by the drawing process. The method of claim 5, The tube for the photosensitive drum, characterized in that the welded tube body has a hardness difference between any one welded portion and the non-welded portion selected from Vickers hardness standards, 0.13 to 1.92.

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