JP2004130504A - Machining method of cylindrical member, machining device of cylindrical member, and cylindrical member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machining method and a machining device which prevent chattering vibration without inserting a vibration-proofing body into a cylindrical member and manufactures the high precision cylindrical member with high productivity, and also to provide the cylindrical member machined by them. <P>SOLUTION: A damper 29 for suppressing the chattering vibration is disposed at a position suitable distance away from a rotary tool unit 17. The damper 29 is fixed to a mass body 30 so that an elastic body 31 does not project from the mass body 30 and always contacts with the entire outer periphery of work 1, by storing the ring-like elastic body 31 in a hole 30' formed in the mass body 30 and screwing a lid 33 with a screw 33a. A several steel balls 32 are arranged on the upper and lower surfaces of the mass body 30 so that the mass body 30 freely moves in a less frictional resistance state in the normal direction of the work 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a processing method and a processing apparatus for processing a surface of an outer peripheral surface of a cylindrical member, and a cylindrical member processed by them.
[0002]
In particular, the present invention relates to a developing sleeve and a cylindrical member such as a photosensitive drum used in an image forming apparatus such as a copying machine and a laser beam printer, and a processing method and a processing apparatus therefor.
[0003]
[Prior art]
Conventionally, in the case of cutting or grinding the outer peripheral surface of a cylindrical member, the cylindrical member is held on a rotating chuck provided with a rotating shaft, and rotated by a rotational force from a driving source, and a tool such as a cutting tool is rotated on a rotating surface. And pressed.
[0004]
In the case of such a method in which the cylindrical member is held and rotated, it is necessary to perform a rotation stop operation every time the processing of one workpiece is completed, to perform the mounting and replacing work of the workpiece, and to start the processing of the next workpiece. A rotation start operation was required for this. That is, there is a problem that a useless time for stopping the rotation and starting the rotation is generated, and the productivity is reduced.
[0005]
To solve this problem, for example, a method disclosed in Patent Document 1 has been proposed.
[0006]
[Patent Document 1]
JP-A-6-328303
[0007]
[Problems to be solved by the invention]
In the above-mentioned conventional machining method, when the number of revolutions of the machining tool and the feed rate of the tool are increased for the purpose of improving productivity, a phenomenon of chatter vibration occurs, the accuracy of the machining surface is reduced, and defective products are generated. Therefore, for example, in Patent Literature 1, chatter vibration is suppressed by inserting the vibration isolator into the inner diameter portion of the horizontally held cylindrical member, but the vibration isolator is horizontally supported by its own weight. The deformed work causes bending deformation, and after the outer peripheral surface processing is completed, the vibration isolator is extracted from the cylindrical member, and the elastic recovery causes the work to return to its original shape by the amount of the bending deformation. There is a problem that the straightness of the outer peripheral surface is deteriorated.
[0008]
In addition, there is a problem that the vibration isolator must be inserted into each of the cylindrical members, and it takes a long time to attach and detach the vibration isolator.
[0009]
Therefore, the present invention has been made in view of the above-described problem, and an object of the present invention is to suppress chatter vibration without inserting a vibration isolator into a cylindrical member and to manufacture a highly accurate cylindrical member with high productivity. It is an object of the present invention to provide a processing method and a processing apparatus which can perform the above-described processing and a cylindrical member processed by the processing method and the processing apparatus.
[0010]
Another object of the present invention is to produce a highly accurate cylindrical member by effectively suppressing chatter vibration even in a method of vertically supporting the cylindrical member, preventing the straightness from deteriorating due to bending deformation of the cylindrical member. It is an object of the present invention to provide a processing method and a processing apparatus capable of performing the same and a cylindrical member processed by them.
[0011]
Still another object of the present invention is to realize high-quality image formation by using the high-precision cylindrical member obtained by the present invention for a developing sleeve and a photosensitive drum for an image forming apparatus.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the object, a method for processing a cylindrical member according to the present invention is a method for processing a cylindrical member for processing an outer peripheral surface of the cylindrical member with a processing tool, comprising: Portion is supported in a non-rotating state, a damper is disposed so as to be movable in the vicinity of the processing tool and with the processing tool, and is disposed so as to be in contact with the outer peripheral surface of the cylindrical member. And processing the outer peripheral surface of the cylindrical member by rotating the processing tool around the outer periphery of the cylindrical member while relatively moving along the axial direction of the cylindrical member.
[0013]
Further, in the method for processing a cylindrical member according to the present invention, the cylindrical member may be processed in a state where the cylindrical member stands in a substantially vertical direction and both ends are supported in a non-rotating state.
[0014]
In the method for processing a cylindrical member according to the present invention, it is preferable that the damper includes a mass body and an elastic body fixed to the mass body so as to be always in contact with the outer periphery of the cylindrical member.
[0015]
In the method for processing a cylindrical member according to the present invention, the damper may include a steel ball disposed so that the mass body can move in a normal direction of the cylindrical member.
[0016]
In the method for processing a cylindrical member according to the present invention, a dust collection cover may be provided to cover the processing tool, and a damper may be attached to the dust collection cover.
[0017]
Further, the cylindrical member processing apparatus of the present invention is a cylindrical member processing apparatus for processing the outer peripheral surface of the cylindrical member with a processing tool, and a supporting means for supporting both ends of the cylindrical member in a non-rotating state; A damper disposed in the vicinity of the tool and movably with the processing tool and in contact with the outer peripheral surface of the cylindrical member; rotating means for rotating the processing tool around the outer circumference of the cylindrical member; and the cylindrical member And moving means for relatively moving the processing tool along the axial direction of the cylindrical member.
[0018]
In the cylindrical member processing apparatus of the present invention, both ends of the cylindrical member may be supported in a non-rotating state while the cylindrical member is set up in a substantially vertical direction.
[0019]
Moreover, in the cylindrical member processing apparatus of the present invention, a dust collection cover may be provided to cover the processing tool, and a damper may be attached to the dust collection cover.
[0020]
Further, in the cylindrical member processing apparatus of the present invention, it is preferable that the damper includes a mass body and an elastic body fixed to the mass body so as to always contact around the outer periphery of the cylindrical member.
[0021]
In the cylindrical member processing apparatus of the present invention, the damper may include a steel ball disposed so that the mass body can move in a normal direction of the cylindrical member.
[0022]
The cylindrical member of the present invention is characterized by being processed by the method of processing a cylindrical member of the present invention.
[0023]
The cylindrical member of the present invention is characterized by being processed by the cylindrical member processing apparatus of the present invention.
[0024]
The cylindrical member of the present invention may be used for a developing sleeve or a photosensitive drum of an image forming apparatus.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments will be described below with reference to the accompanying drawings.
[0026]
First, a cylindrical member manufactured by the processing method of the present invention will be described.
[0027]
FIG. 5 shows a known example of a tube material produced by extrusion and drawing, which is cut into a predetermined length, and a cut cylindrical member (hereinafter, referred to as a “workpiece”) is subjected to an end face processing to form a shaft portion. It is a figure explaining the process of mounting. FIG. 5A shows a cross-sectional shape of the work 1 after cutting from the tube material, and FIG. 5B shows a state in which the shaft member 102 is mounted on one end 1a of the work 1 and the enlarged inner diameter portion 1c is formed on the other end 1b. Is shown.
[0028]
The inner diameter enlarged portion 1c is formed by cutting a part of the inner surface of the work to a predetermined inner diameter with high precision to form an annular portion having extremely high roundness and straightness. When the outer peripheral surface of the work 1 is cut by the processing apparatus shown in FIG. 1, the roundness and the straightness of the work inner diameter enlarged portion 1c are finished with high precision, thereby holding the work 1 enlarged inner diameter portion 1c described later. The centering of the work 1 with respect to the processing device can be performed with high accuracy by holding the work 1 with the tool.
[0029]
On the other end 1a side into which the shaft member 102 is inserted, it is necessary to cut the outer diameter of the shaft member 102 or the chamfered portion 102a with high precision as in 1c. The centering of the workpiece 1 with respect to the processing apparatus can be performed with high accuracy by holding the shaft member side with a holder described later.
[0030]
FIG. 1 is a diagram showing a basic configuration of a processing apparatus according to a first embodiment of the present invention. FIG. 1A is a front view of the processing apparatus, and FIG. 1B is a side view of the processing apparatus.
[0031]
In the present embodiment, a case where a workpiece is held by a tapered holder will be described.
[0032]
In FIG. 1, reference numeral 2 denotes a base, which is a base of the processing apparatus, and 17 denotes a rotary tool unit. The rotary tool unit 17 rotatably supports a processing tool described later.
[0033]
Reference numeral 7 'denotes a column having parallel guides 4, 5 attached vertically to the ground plane E. The rotary tool unit 17 can move in a direction perpendicular to the ground plane E along the parallel guides 4 and 5. The rotary tool unit 17 is driven in the vertical direction by a drive device 10 such as an NC drive motor and a feed screw 10a. Here, the embodiment in which the rotary tool unit 17 is moved in the vertical direction is described, but cutting may be performed by moving the work 1 in the vertical direction.
[0034]
A slider support 8 is mounted on the column 7 'on the upper side in the figure.
[0035]
Reference numeral 12 denotes a slider mounted on the slider support 8, and an upper post 14 is fixed to the slider 12. The slider 12 is driven in a vertical direction with respect to the slider support 8 by a driving device 11 such as an NC drive motor attached to the slider support 8 and a feed screw 11a. The balancer 15 for canceling the self-weight of the slider 12 is connected to the slider 12 in order to reduce the power when the slider 12 is moved by the driving device 11.
[0036]
Reference numeral 18 denotes a lower post mounted on the column 7 '. Reference numeral 20 denotes an upper work holder attached to the upper post 14, and reference numeral 22 denotes a lower work holder attached to the lower post 18. Reference numeral 1 denotes a cylindrical member (work) whose both ends are supported by an upper work holder 20 and a lower work holder 22.
[0037]
The work 1 is centered by inserting the tapered portion 20a of the upper work holder 20 and the tapered portion 22a of the lower work holder 22 into the upper and lower ends thereof, respectively.
[0038]
FIGS. 3 and 4 are views showing a lower work holder 22 and an upper work holder 20 used in the processing apparatus of the present invention. FIG. 3 shows the lower work holder 22 for holding the inner diameter of the work 1. FIG. 4 shows the upper work holder 20 for holding the shaft member side.
[0039]
In FIG. 3, FIG. 3 (a) is a schematic view of a holder for holding the inner diameter of the work 1, and the holder 22 is made of a superalloy or iron, and has a mounting part 221 and a mounting auxiliary part 221 having a tapered part. The outer diameter of the portion ahead of 'has two stages, and has a first outer diameter portion 222a having a smaller outer diameter and a second outer diameter portion 222b having a larger outer diameter than the first outer diameter portion, Between the tip of the first outer diameter portion, the first outer diameter portion, and the second outer diameter portion, there are a first tapered grip portion 223a and a second tapered grip portion each having a truncated conical shape in two stages, large and small. The portion 223b is formed.
[0040]
FIG. 3B is a diagram illustrating a state where the work 1 having the first inner diameter and the outer diameter is gripped by the first tapered grip 223a. When the first tapered grip portion 223a is inserted, the tapered surface, which is the clamp surface of the grip portion 223a, is a circumferential ridge between the end face 1d of the work 1 and the enlarged inner diameter portion 1c, where these intersect. It is configured to be in contact with the circular ridge portion. FIG. 3 (b ′) shows an example of actual dimensions of the holder and the work 1, and also includes processing tools 206 a and 206 b to be described later and a damper provided below the work tools when cutting the outer periphery of the work 1. 29 shows the relationship between the processing feed end position and the holder. The first outer diameter portion 222a is set to be thinner than the outer diameter of the workpiece 1, and the distance between the damper 29 provided at the lower part of the processing tool and the second tapered grip portion at the end point of the processing tool 206a, 206b described later. The length of the first outer diameter portion 222a is set to be sufficient.
[0041]
FIG. 3C is a diagram showing a state in which the workpiece 1 having the second inner diameter and the outer diameter is gripped by the second tapered gripping part 223b. When the first tapered grip portion 223b is inserted, the tapered surface, which is the clamp surface of the grip portion 223b, is a circumferential ridge line between the end surface 1d of the work 1 and the enlarged inner diameter portion 1c, where they intersect. It is configured to be in contact with the circular ridge portion. FIG. 3 (c ') shows an example of actual dimensions of the holder and the work 1, and also includes machining tools 206a and 206b, which will be described later, and a damper provided below the work tools when the outer periphery of the work 1 is cut. 29 shows the relationship between the processing feed end position and the holder. The first outer diameter portion 222b is set to be thinner than the outer diameter of the work 1, and the distance between the damper 29 provided below the processing tool and the mounting auxiliary portion 221 'at the end point position of the processing tool 206a, 206b described later is sufficient. The length of the second outer diameter portion 222b is set as is.
[0042]
FIG. 4 shows a holder 20 for holding the shaft member side of the work 1, and FIG. 4A shows a schematic diagram of a holder for holding the shaft member. It is made of superalloy or iron, has a long hole portion 201, and has an inner diameter enlarged portion 201a larger than the inner diameter of the long hole portion 201 at the end face portion. A first tapered grip portion 202a and a second tapered grip portion 202b in two stages of large and small, each having a truncated cone shape, are formed between 201a and the end face of the holder.
[0043]
FIGS. 4B to 4D are views showing a state in which shaft members having different diameters are held, and a first taper is formed on a circular ridge line portion formed in the chamfered portion 102a of the shaft member. It is configured to abut and hold the toroidal grip 202a or the second tapered grip 202b.
[0044]
The work 1 is held between the upper work holder 20 and the lower work holder 22 by a pressing force P in the axial direction. This pressing force P is set so that the so-called twisting phenomenon in which the work 1 rotates together with the working tool when the work tool rotates around the work 1 does not occur, and conversely, the work 1 is not plastically deformed. The value of the pressing force P is set in advance. When the amount of cutting of the cylindrical surface of the work 1 is large, or when the cylindrical surface is cut at a high speed, the cutting force increases, so that the pressing force P needs to be increased. The circular ridge of the work 1 may be plastically deformed, causing a remarkable assembling error when assembling the cylindrical member as a product to another part. In such a case, the end face 1d of the work 1 or the shaft It is advisable to chamfer the clamp portion of the member.
[0045]
In the present embodiment, the upper work holder 20 is a holder for holding the shaft member, and the lower work holder 22 is a holder for holding the inner diameter. However, depending on the shape of the work 1, the upper work holder 20 and the lower work In both cases, it is possible to use both the holder for holding the shaft member and the holder for holding the inner diameter.
[0046]
In order to improve the runout and cylindricity of the work after processing and the unevenness of the work after processing, it is necessary to accurately position the work along a predetermined axis, but as described above, If the work ridge is formed coaxially with respect to the center axis of the work, if the tapered gripping portion of the holder is arranged coaxially with respect to a predetermined axis, the ridge along the predetermined axis The workpiece can be positioned accurately by using a plurality of tapered grips on the holder. It is not necessary to replace the holder for the inner or outer diameter every time the inner or outer diameter changes.In this case, the coaxiality between the holder and the rotating shaft of the machining tool is accurately determined every time the holder is replaced. No need to assemble This exchange set-up time is unnecessary processing time for work is dramatically improved.
[0047]
Next, returning to FIG. 1, the description will be continued. The rotary tool unit 17 has the tool rotary shaft 6 attached thereto, and a damper 29 for suppressing chatter vibration at a position at an appropriate distance via a dust collecting cover 36 attached to the rotary tool unit 17. Is provided. One embodiment of the rotary tool unit 17 and the damper 29 is shown in FIG. 2A is a schematic view of the rotary tool unit 17 and the damper 29, and FIG. 2B is a schematic cross-sectional view taken along the line AA '.
[0048]
In FIG. 2, first, a tool rotating shaft 6 is attached to a rotating tool unit 17, and the tool rotating shaft 6 is rotatably supported by a housing 210 as an outer shell and a hydrostatic bearing in the housing 210. 208, a cover 264 for covering the coil 260 as a stator and the magnet 262 integrally attached to the housing 210, and a tool holder 266 fixed to the right end of the rotor 208 and a processing tool 206 fixed to the tool holder 266. It is configured. When the rotor 208 is rotated, the processing tool 206 is rotated to cut the outer peripheral surface of the work 1, and the rotary tool unit 17 is driven in the vertical direction by the drive device 10 such as an NC drive motor and the feed screw 10 a. As a result, the workpiece 1 and the processing tool 206 relatively move, and the outer peripheral surface of the workpiece 1 is cut in the entire longitudinal direction.
[0049]
The tool holder 266 is provided with a rough cutting tool 206a and a finishing tool 206b, and each tool is mounted with a mounting screw.
[0050]
A dust collecting cover 36 is attached to the rotary tool unit 17 so as to cover the tool holder 266 and the processing tools 206a and 206b, and chips are collected by a dust collector connected to the dust collecting cover 36. Further, a damper 29 for suppressing chatter vibration is disposed below the dust collecting cover 36.
[0051]
FIG. 2 also shows an embodiment of the damper 29, in which a ring-shaped elastic body 31 is housed in a hole 30 'provided in the mass body 30, and the lid 33 is screwed with a screw 33a. The elastic body 31 is fixed to the mass body 30 so that the elastic body 31 does not protrude from the mass body 30 and always touches the entire outer periphery of the work 1.
[0052]
The mass body 30 may be made of any material as long as it has mass, but for example, BsBM (free-cutting brass), quenched iron, or the like may be used.
[0053]
The elastic body 31 has, for example, a shape as shown in FIG. 6, and here, a commercially available packing or cushion seal is used.
[0054]
An elastic body is arranged between the ring-shaped mass body 30 having mass and the cylindrical member, and vibration transmitted from the cylindrical member to the elastic body is absorbed by the elastic body and the mass body, thereby suppressing chatter vibration generated in the cylindrical member. In addition, it is possible to prevent scratches and deformation due to the hard mass directly swinging on the cylindrical member.
[0055]
Further, several steel balls 32 are arranged on the upper and lower surfaces of the mass body 30 so that the mass body 30 moves freely in the normal direction of the work 1 with little frictional resistance. Here, eight are arranged. Further, at the time of disposition, they were disposed via members (retainers) 34a and 34b for restricting the movement of the steel ball up and down so that the steel ball always stayed at substantially the same position. This makes it possible to minimize eccentricity due to the mass body being offset in one direction due to the influence of processing accuracy or the like. If the run-out accuracy of the work 1 after processing may be poor, the steel balls 32 need not be arranged. In that case, of course, the member (retainer) 34 for restricting the movement of the steel ball is unnecessary. Further, a cover 35 is attached so as to cover the damper 29.
[0056]
With the above configuration, the rotary tool unit 17 is driven vertically by the driving device 10 such as an NC drive motor and the feed screw 10a, so that the workpiece 1 and the processing tool 206 relatively move, and the outer periphery of the workpiece 1 When the surface is cut in the entire longitudinal direction, a mass body can be placed via an elastic body on the outer periphery of the cylindrical member that always keeps an appropriate distance from the processing tool, and a vibration isolator is inserted into the cylindrical member. It is possible to suppress chatter vibration even without it. In addition, the damper can always be arranged near the source of external force called the machining tool, and the mass can be applied to the cylindrical member until immediately before the end of machining. Vibration can be suppressed. Further, by adopting such a configuration, it is possible to eliminate the work of taking the vibration isolator in and out of the cylindrical member, and there is no need for a device for attaching and detaching the vibration isolator. Production efficiency can be improved, and automation and unmanned processing can be easily performed. In addition, even when the cylindrical member is held vertically, chatter vibration can be effectively suppressed. Therefore, even when the cylindrical member is held vertically, chatter vibration does not occur. The outer periphery of the member can be machined, the bending deformation of the cylindrical member is eliminated, and the deflection accuracy of the machined cylindrical member is improved.
[0057]
Here, the embodiment in which the rotary tool unit 17 is moved in the vertical direction is described, but the same effect can be obtained when the work 1 is moved in the vertical direction and the work 1 and the processing tool 206 are relatively moved.
[0058]
Next, the outer diameter cutting of the work 1 will be described in detail with reference to FIGS.
[0059]
The NC-controlled drive unit 11 for driving the slider 12 is previously stopped at the lower end of the slider 12 so that an axial pressing force P is generated between the upper work holder 20 and the lower work holder 22 on the work 1. The NC control drive device 10 that sets the position and drives the rotary tool unit 17 is set with the feed speed, the processing feed start position coordinates, and the processing feed end position coordinates of the rotary tool unit 17.
[0060]
First, the driving device 11 is driven to move the slider 12 to the upper end by the feed screw 11a. In addition, the driving device 10 is driven, and the rotary tool unit 17 is also moved upward by the feed screw 10a. In this state, the work 1 is supplied vertically to the tip of the lower work holder 22. The method of supplying the work 1 includes a method by a worker's hand and a method by an automatic hand of a robot. With the work 1 being supplied to the tip of the lower work holder 22, the slider 12 is lowered, and the upper work holder 20 holds the upper end of the work 1. At this time, the upper work holder 20 is lowered to the preset lower end stop position while the hollow portion of the tool rotation shaft of the rotary tool unit, the tool holder, and the processing tool are inserted, and the work 1 is moved to the upper work holder 20. And the lower work holder 22 is held by the pressing force P in the axial direction.
[0061]
When the holding of the work 1 is completed, the gripping of the work by the supply means (manual or robot hand) is released.
[0062]
Subsequently, the operation of the drive device 10 causes the rotary tool unit 17 to start moving downward, and at the same time, the coil 260 in the tool rotary shaft 6 is energized to rotate the rotor 208, thereby rotating the processing tools 206a and 206b to rotate the workpiece 1 The outer peripheral surface of the cutting tool is cut, and chatter vibration generated at the time of cutting is suppressed by the damper 29 arranged below the processing tool 206, so that high-precision processing can be efficiently performed.
[0063]
When the machining tool unit 17 reaches the machining feed end point, the driving device 10 stops its driving, and at the same time, stops the energization of the coil 260 in the tool rotating shaft 6 to stop the machining tool from rotating. The work 1 is moved, the holding of the work 1 is released, and the processed work 1 is taken out.
[0064]
Then, the driving device 10 is driven to move the rotary tool unit 17 upward by the feed screw 10a. In this state, the work 1 is supplied vertically to the tip of the lower work holding tool 22 and is processed.
[0065]
Further, when processing a workpiece having a different diameter, the processing is started after changing the conditions set in advance before starting the processing. Specifically, the NC control driving device 11 that drives the slider 12 is provided with the slider 12 so that an axial pressing force P is generated between the upper work holder 20 and the lower work holder 22 with respect to the work 1. In the NC control driving device 10 for setting the lower end stop position of the rotary tool unit 17 and driving the rotary tool unit 17, the feed speed of the rotary tool unit 17, the coordinate of the processing feed start position, and the coordinate of the processing feed end position are set.
[0066]
In the same manner, the drive device 10 is driven to move the rotary tool unit 17 upward by the feed screw 10a. In this state, the work 1 is supplied vertically to the distal end of the lower work holder 22, and processing is started. .
[0067]
Next, an embodiment in which a developing sleeve used in a developing device for an image forming apparatus is processed by using the processing device and the damper will be described.
[0068]
(Example)
As a material of the cylindrical member 1 as a work, Al (A6063) was used as a developing sleeve used in a developing device for an image forming apparatus.
[0069]
As a raw material of the cylindrical member 1, a material obtained by extruding or drawing the above material is used. The outer diameter, inner diameter, and overall length of the cylindrical member 1 are as follows.
Outer diameter: φ20.1mm
Inner diameter: φ18.4mm (= 0.85mm thickness)
Full length: 364mm
The shaft member 102 attached to one end has a length of 43 mm and a shaft portion outer diameter of 8 mm.
[0070]
In this embodiment, the condition of the tool holder is as follows:
Cutting amount of rough cutting tool 0.045mm (radius removal amount)
The tip shape of the rough cutting tool is R0.2mm
Cutting depth of finishing bit 0.005mm (radius removal amount)
The tip of the finishing bit is R1.0mm
The material of the tool tip of the rough cutting tool and the finish tool was sintered diamond.
[0071]
Processing conditions are
Rotational axis rotation speed 20000min-1
Feed speed 33.3mm / s
Was set and processing was performed.
[0072]
In the present embodiment, as the processing device to which the damper 29 is attached, a device in which the moving part at the time of processing is on the tool rotation axis side is used. In this case, the weight of the moving body can be reduced, and rapid acceleration and deceleration can be performed at the start of processing and at the end of processing.
[0073]
As described above, as a result of actually applying and processing the damper 29 to the outer peripheral surface of the cylindrical member 1 having a material of Al, an outer diameter of 20.1 mm, an inner diameter of 18.4 mm, and a length of 364 mm, A good processed surface (a state of a stable cutting waveform) was obtained without occurrence of chattering vibration, and the surface was able to be processed to a surface roughness Ra of about 0.3 μm.
[0074]
As described above, according to the above embodiment, when the cylindrical member and the processing tool are relatively moved and the outer peripheral surface of the cylindrical member is cut over the entire longitudinal direction, an appropriate distance is always maintained with the processing tool. By arranging a damper on the outer peripheral portion of the cylindrical member via an elastic body, chatter vibration can be suppressed without inserting a vibration isolating material into the cylindrical member. This eliminates the need for a device for attaching and detaching a vibration isolator, and also eliminates the need for such an operation, thereby saving labor and improving production efficiency. In addition, since chatter vibration can be suppressed even in a state where the cylindrical member is held vertically, bending deformation of the cylindrical member is eliminated, and run-out accuracy of the processed cylindrical member can be improved.
[0075]
【The invention's effect】
As described above, according to the present invention, chatter vibration can be prevented without inserting a vibration isolator into the cylindrical member, and a highly accurate cylindrical member can be manufactured with high productivity.
[0076]
Also, in the method of vertically supporting the cylindrical member, chatter vibration can be effectively suppressed, straightness deterioration due to bending deformation of the cylindrical member can be prevented, and a highly accurate cylindrical member can be manufactured.
[Brief description of the drawings]
FIG. 1 is a diagram showing a basic configuration of a cylindrical member processing apparatus of the present invention.
FIG. 2 is a view schematically showing a rotary tool unit and a damper of the cylindrical member processing apparatus of the present invention.
FIG. 3 is a view schematically showing a holder for holding the inner diameter of the cylindrical member processing apparatus of the present invention.
FIG. 4 is a view schematically showing a holder for holding a shaft member of the cylindrical member processing apparatus of the present invention.
FIG. 5 is a diagram illustrating a process of manufacturing a workpiece in the method for processing a cylindrical member according to the present invention.
FIG. 6 is a view schematically showing an elastic body in a damper of the cylindrical member processing apparatus of the present invention.
[Explanation of symbols]
1 Work
6 rotating tool axis
12 Slider
17 Rotary tool unit
29 damper

Claims (14)

A processing method of a cylindrical member for processing the outer peripheral surface of the cylindrical member with a processing tool,
A step of supporting both ends of the cylindrical member in a non-rotating state,
A damper is disposed so as to be movable near the processing tool and with the processing tool, and to be in contact with the outer peripheral surface of the cylindrical member,
Machining the outer peripheral surface of the cylindrical member by relatively moving the cylindrical member and the processing tool along the axial direction of the cylindrical member and rotating the processing tool around the outer periphery of the cylindrical member. A method for processing a cylindrical member, comprising: The method for processing a cylindrical member according to claim 1, wherein the cylindrical member is processed in a state where the cylindrical member is set up in a substantially vertical direction and both ends are supported in a non-rotating state. 2. The method for processing a cylindrical member according to claim 1, wherein the damper includes a mass body and an elastic body fixed to the mass body so as to be always in contact with the outer periphery of the cylindrical member. The method for processing a cylindrical member according to claim 3, wherein the damper has a steel ball disposed so that the mass body can move in a normal direction of the cylindrical member. The processing apparatus for a cylindrical member according to claim 1, further comprising a dust collection cover that covers the processing tool, wherein the damper is attached to the dust collection cover. A cylindrical member processing apparatus for processing the outer peripheral surface of the cylindrical member with a processing tool,
Support means for supporting both ends of the cylindrical member in a non-rotating state,
A damper disposed movably in the vicinity of the processing tool and with the processing tool, and in contact with the outer peripheral surface of the cylindrical member;
Rotating means for rotating a processing tool around the outer periphery of the cylindrical member,
An apparatus for processing a cylindrical member, comprising: a moving means for relatively moving the cylindrical member and the processing tool along an axial direction of the cylindrical member. 7. An apparatus for processing a cylindrical member according to claim 6, further comprising support means for supporting both ends of said cylindrical member in a substantially vertical direction in a non-rotating state. 7. The apparatus for processing a cylindrical member according to claim 6, further comprising a dust collection cover for covering the processing tool, wherein the damper is attached to the dust collection cover. 7. The cylindrical member processing apparatus according to claim 6, wherein the damper includes a mass body and an elastic body fixed to the mass body so as to be always in contact with the outer periphery of the cylindrical member. The cylindrical member processing apparatus according to claim 9, wherein the damper includes a steel ball disposed so that the mass body can move in a normal direction of the cylindrical member. A cylindrical member processed by the method for processing a cylindrical member according to claim 1. The cylindrical member according to claim 11, which is used for a developing sleeve or a photosensitive drum of an image forming apparatus. A cylindrical member processed by the cylindrical member processing apparatus according to claim 6. The cylindrical member according to claim 13, which is used for a developing sleeve or a photosensitive drum of an image forming apparatus.

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