JP2905672B2 - Cylindrical body and drum base for electrophotographic apparatus, method for holding the same, manufacturing method and processing apparatus - Google Patents
Cylindrical body and drum base for electrophotographic apparatus, method for holding the same, manufacturing method and processing apparatusInfo
- Publication number
- JP2905672B2 JP2905672B2 JP5210995A JP21099593A JP2905672B2 JP 2905672 B2 JP2905672 B2 JP 2905672B2 JP 5210995 A JP5210995 A JP 5210995A JP 21099593 A JP21099593 A JP 21099593A JP 2905672 B2 JP2905672 B2 JP 2905672B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical body
- center axis
- rotation center
- peripheral surface
- circumferential direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Turning (AREA)
- Jigs For Machine Tools (AREA)
- Gripping On Spindles (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Photoreceptors In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真方式による画
像形成装置における電子写真感光ドラムや現像スリーブ
の本体部であるいわゆる電子写真装置用のドラム基体等
に用いられる円筒体とその製造方法並びに装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical body used as a drum base for an electrophotographic apparatus, which is a main body of an electrophotographic photosensitive drum and a developing sleeve in an electrophotographic image forming apparatus, and a method of manufacturing the same. It concerns the device.
【０００２】[0002]
【従来の技術】従来、電子写真方式の複写機は、図１１
に示すように、原稿台ガラス２１０上に載置された図示
しない原稿を照明ランプ２００からの露光光２２０で照
明することにより、前記原稿の情報を帯電手段４００に
よって帯電させた感光ドラム３００に転写して潜像と
し、該潜像に現像スリーブ３０１によりトナーを付着さ
せて現像し、これを転写手段５００によってコピー用紙
Ｐ上に転写したのち定着ローラ６００で加熱定着させる
ように構成されている。この複写機において、良好な複
写を得るために、感光ドラム３００と現像スリーブ３０
１とは厳密に規定された許容範囲の距離を保って平行に
配置されている（「複写機の基礎技術」１９８７年キヤ
ノン株式会社発行 図３−１参照）。2. Description of the Related Art A conventional electrophotographic copier is shown in FIG.
As shown in FIG. 7, by illuminating an original (not shown) placed on an original platen glass 210 with exposure light 220 from an illumination lamp 200, information on the original is transferred to a photosensitive drum 300 charged by charging means 400. The latent image is developed by applying toner to the latent image by a developing sleeve 301, transferring the latent image onto a copy sheet P by a transfer unit 500, and then fixing the latent image by heating with a fixing roller 600. In this copying machine, in order to obtain good copying, the photosensitive drum 300 and the developing sleeve 30
1 is arranged in parallel with keeping a strictly prescribed allowable distance (refer to FIG. 3-1 by Canon Inc., 1987, "Basic Technology of Copying Machine").
【０００３】例えば、図１３に示すように、感光ドラム
３００は、その一端に嵌挿されたフランジギア３０２の
回転軸３１２が枠部材３１０に固定された軸受部材３１
１に軸受３１３を介し回転自在に支持されており、他端
は枠部材３１０に固定された軸受部材３０３の軸受部３
０３ａによって回転自在に支持されている。他方、現像
スリーブ３０１は、その一端にスリーブギア３０９の一
部が嵌挿されているとともに両端部の外側には感光ドラ
ム３００との距離を規定するための一対の当接リング３
０５が嵌合されており、両端部近傍を回転自在に支承す
る一対の軸受３０６をそれぞれスプリング２０７の弾発
力によって常時感光ドラム３００に向けて付勢すること
により、前記当接リング３０５が感光ドラム３００の両
端部外周面に当接するように構成されている。つまり、
感光ドラム３００や現像スリーブ３０１の端部には、フ
ランジギア３０２やスリーブギア３０９等の回転駆動力
を伝達するための回転力伝達部材が嵌挿されている（本
出願人の出願に係る特願平４−１９４６５８号の明細書
参照）。For example, as shown in FIG. 13, a photosensitive drum 300 has a bearing member 31 in which a rotating shaft 312 of a flange gear 302 fitted at one end thereof is fixed to a frame member 310.
1 is rotatably supported via a bearing 313, and the other end of the bearing portion 3 of the bearing member 303 fixed to the frame member 310.
03a rotatably supported. On the other hand, a part of the sleeve gear 309 is fitted into one end of the developing sleeve 301, and a pair of abutting rings 3 for defining a distance from the photosensitive drum 300 is provided outside both ends.
05 are fitted, and a pair of bearings 306 that rotatably support the vicinity of both ends are constantly urged toward the photosensitive drum 300 by the elastic force of a spring 207, so that the contact ring 305 is exposed to light. The drum 300 is configured to come into contact with the outer peripheral surfaces of both ends. That is,
At the ends of the photosensitive drum 300 and the developing sleeve 301, a rotational force transmitting member for transmitting a rotational driving force, such as a flange gear 302 or a sleeve gear 309, is fitted. See the specification of JP-A-4-194658).
【０００４】上述したような感光ドラムや現像スリーブ
は、引き抜き加工によって製造したアルミニウム等の管
材のうち、管材の軸線方向の真直度や真円度が所定の許
容範囲のものを用い、その両端部を切削加工して前記回
転力伝達部材を嵌挿して組付けている。The photosensitive drum and the developing sleeve described above are made of a tube made of aluminum or the like manufactured by drawing and having a straightness and a roundness in the axial direction of the tube within a predetermined allowable range. And the rotational force transmitting member is inserted and assembled.
【０００５】両端部の切削加工は、管材の両端部外周面
を数値制御旋盤等の加工機のワークチャック装置によっ
て塑性変形しない程度に締付けて固定して行っている
が、ワークチャック装置で固定した際に、図１２に示す
ように管材９００の軸線方向の真直度が実線に示す曲が
りのある自然状態から点線に示すように矯正されて軸線
θ1 −θ1 に沿った真直な状態で固定され、この状態で
切削加工される。このため、切削加工後ワークチャック
装置から加工済の管材を取り外すと、管材は自然状態の
実線で示す形状に戻ってしまい、その端部に前記フラン
ジギアやスリーブギア等の回転力伝達部材を嵌挿して組
付けると、感光ドラムと現像スリーブの間の距離の狂い
や回転偏心を引き起こすことになる。[0005] The cutting of both ends is performed by fixing the outer peripheral surfaces of both ends of the tube material by a work chuck device of a processing machine such as a numerical control lathe so as not to be plastically deformed, but fixed by the work chuck device. At this time, as shown in FIG. 12, the straightness in the axial direction of the pipe 900 is corrected from the natural state of the curve shown by the solid line to the dotted line, and fixed in a straight state along the axis θ 1 −θ 1. In this state, cutting is performed. For this reason, when the processed pipe material is removed from the work chuck device after cutting, the pipe material returns to the shape shown by the solid line in the natural state, and the rotational force transmitting member such as the flange gear or the sleeve gear is fitted to the end. If inserted and assembled, the distance between the photosensitive drum and the developing sleeve may be deviated or rotational eccentricity may occur.
【０００６】また、電子写真方式の複写機、レーザビー
ムプリンタ、ファクシミリ、印刷機等の電子写真方式に
よる画像形成装置における電子写真装置用の感光ドラム
は、周面が鏡面仕上げされた電子写真装置用のドラム基
体（以下、「ドラム基体」という。）の表面に感光膜を
施すことにより製造されているが、良好な感光膜を有す
る電子写真装置用の感光ドラムを製造するためには、前
記ドラム基体の表面精度および寸法精度は高精度に仕上
げておかなくてはならず、次の（イ）または（ロ）の方
法によりドラム基体の両端部を切削加工したのち、その
両端を支持してドラム基体を回転させ、切削工具をドラ
ム基体の軸方向に移動させてドラム基体の外周面を切削
加工していた。A photosensitive drum for an electrophotographic apparatus in an electrophotographic image forming apparatus such as an electrophotographic copying machine, a laser beam printer, a facsimile, and a printing machine is used for an electrophotographic apparatus having a mirror-finished peripheral surface. Is manufactured by applying a photosensitive film to the surface of a drum substrate (hereinafter, referred to as “drum substrate”). In order to manufacture a photosensitive drum for an electrophotographic apparatus having a favorable photosensitive film, The surface precision and dimensional precision of the substrate must be finished with high precision. After cutting both ends of the drum substrate by the following method (a) or (b), the drum is supported by both ends. The outer peripheral surface of the drum base is cut by rotating the base and moving the cutting tool in the axial direction of the drum base.
【０００７】（イ）アルミニウムまたはアルミニウム合
金からなる管材を所定長さに切断してワークを製造し、
該ワークの両端部近傍をスプリングコレットで支持して
回転させ、前記ワークの両端面、両端部内周面および両
端部外周面を切削加工する方法。(A) A work is manufactured by cutting a tube made of aluminum or an aluminum alloy into a predetermined length.
A method in which the vicinity of both ends of the work is supported and rotated by a spring collet, and both ends, an inner peripheral surface of both ends, and an outer peripheral surface of both ends of the work are cut.
【０００８】（ロ）図１０に示すように、上記（イ）と
同様に製造したワーク１０１をＶブロック１０２上に載
置し、押え部材１０３で押圧して固定し、切削工具側を
回転させ、前記ワーク１０１の両端面、両端部内周面お
よび両端部外周面を切削加工する方法。(B) As shown in FIG. 10, a work 101 manufactured in the same manner as in (a) above is placed on a V-block 102, pressed and fixed by a holding member 103, and the cutting tool is rotated. A method of cutting both end surfaces, inner peripheral surfaces of both ends, and outer peripheral surfaces of both ends of the work 101.
【０００９】[0009]
【発明が解決しようとする課題】上記従来の技術のう
ち、（イ）の方法では、ワークの回転にともなう振動が
発生し、このワークの振動は回転数が高速になるにつれ
て増大して加工精度が低下するため、ワークの回転数を
あまり高速に設定することができず生産性が低い上、加
工精度にばらつきが生じて歩留りが悪い。Among the above-mentioned prior arts, in the method (a), a vibration accompanying the rotation of the work is generated, and the vibration of the work increases as the rotation speed increases, and the processing accuracy increases. Therefore, the rotational speed of the work cannot be set to a very high speed, the productivity is low, and the processing accuracy varies, resulting in poor yield.
【００１０】また（ロ）の方法では、Ｖブロックはワー
クの軸方向に幅があるため、ワークの外周面の軸方向に
線接触となるため、ワークの外周面の凹凸や曲がりによ
って接触位置が不安定であるとともに、押え部材でワー
クを押圧したときワークに曲げモーメントがかかり、ワ
ークが曲げられたり、ワークの中心軸が移動してしまい
高精度の切削加工は望めない。In the method (b), since the V block has a width in the axial direction of the work, the V block comes into line contact with the outer peripheral surface of the work in the axial direction. In addition to being unstable, when the work is pressed by the holding member, a bending moment is applied to the work, and the work is bent or the center axis of the work moves, so that high-precision cutting cannot be expected.
【００１１】さらに、上記従来の技術では金属製の管材
を用いているため、材料コストや加工コストが高い。Further, in the above-mentioned conventional technology, since a metal tube is used, material costs and processing costs are high.
【００１２】本発明は、上記従来の技術の有する未解決
の課題に鑑みてなされたものであって、金属製または樹
脂製を問わず端部に高精度の嵌合部を形成した円筒体お
よび前記円筒体を用いた電子写真装置用のドラム基体を
実現することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned unresolved problems of the prior art, and is directed to a cylindrical body having a high-precision fitting portion formed at an end thereof regardless of whether it is made of metal or resin. It is an object of the present invention to realize a drum base for an electrophotographic apparatus using the cylindrical body.
【００１３】また、上記筒状体を高精度でしかも高速で
加工することができる保持方法、製造方法およびその加
工装置を実現することを目的とするものである。It is another object of the present invention to realize a holding method, a manufacturing method, and a processing apparatus capable of processing the cylindrical body with high accuracy and at high speed.
【００１４】[0014]
【課題を解決するための手段】上記目的を達成するため
に、本発明の円筒体は、端部の少なくとも円周面に回転
力伝達部材を嵌合するための嵌合部を形成した円筒体で
あって、前記嵌合部は、前記円筒体の端部近傍の外周面
を周方向に互いに間隔をおいた少なくとも３箇所にて前
記周方向に線接触する当接部材で締め付けることによっ
て前記円筒体を弾性変形域内の変形を保つ状態で固定し
ておき、切削工具を支持してその回転中心軸まわりに回
転させる主軸を備えるとともに、該回転中心軸線に沿っ
て移動する切削手段により前記端部の少なくとも内周面
を切削加工したものであることを特徴ものである。ここ
で円筒体は、金属、とりわけアルミニウムまたはアルミ
ニウム合金製や、樹脂製とする。In order to achieve the above object, a cylindrical body of the present invention has a cylindrical body having a fitting portion for fitting a rotational force transmitting member to at least a circumferential surface of an end portion. Wherein the fitting portion tightens the outer peripheral surface near the end of the cylindrical body with a contact member that makes line contact in the circumferential direction at at least three places spaced apart from each other in the circumferential direction. The body is fixed while maintaining the deformation within the elastic deformation area, and a main shaft for supporting a cutting tool and rotating about a rotation center axis thereof is provided, and the end portion is moved by cutting means moving along the rotation center axis. Characterized in that at least the inner peripheral surface is cut. Here, the cylindrical body is made of metal, especially aluminum or aluminum alloy, or resin.
【００１５】また、上記円筒体において端部内周面とと
もに端面を切削加工したものは電子写真装置用のドラム
基体として好適である。The above-mentioned cylindrical body obtained by cutting the end face together with the inner peripheral face of the end part is suitable as a drum base for an electrophotographic apparatus.
【００１６】さらに、本発明の円筒体の保持方法は、切
削工具を支持してその回転中心軸線のまわりに回転させ
る主軸を備えるとともに該回転中心軸線に沿って移動す
る切削手段によって円筒体の端部の少なくとも内周面を
切削加工する際に、円筒体の端部近傍の外周面を周方向
に互いに間隔をおいた少なくとも３箇所にて前記周方向
に線接触する当接部材を有する押圧部材を用いて、前記
当接部材の中心軸線が前記回転中心軸線に一致するよう
に前記押圧部材を位置決めしておき、該押圧部材の前記
当接部材で前記円筒体を締め付けることによって該円筒
体を弾性変形域内の変形を保つ状態で固定することを特
徴とするものである。該保持方法において、押圧部材の
位置決めは、保持すべき円筒体の外形寸法より弾性変形
域内の変形の変形量の範囲の寸法を差し引いた外径の円
筒状ゲージ部材を用い、該円筒状ゲージ部材をその外周
面に前記押圧部材の当接部材を当接させた状態とし、こ
の状態の円筒状ゲージの軸心が主軸の回転中心軸線と一
致するように押圧部材の位置を調節して行うと効果的で
ある。Further, the method for holding a cylindrical body according to the present invention comprises a main shaft for supporting and rotating the cutting tool about its rotation center axis, and the cutting means moving along the rotation center axis. A pressurizing member having a contact member that makes line contact in the circumferential direction at least at three places circumferentially spaced from each other on the outer circumferential surface near the end of the cylindrical body when cutting at least the inner circumferential surface of the portion; The pressing member is positioned so that the center axis of the contact member coincides with the rotation center axis, and the cylinder is tightened by the contact member of the pressing member. It is characterized in that it is fixed while maintaining the deformation within the elastic deformation region. In the holding method, the positioning of the pressing member is performed by using a cylindrical gauge member having an outer diameter obtained by subtracting a dimension of a deformation amount in an elastic deformation range from an outer dimension of the cylindrical body to be held, and using the cylindrical gauge member. When the contact member of the pressing member is brought into contact with the outer peripheral surface, the position of the pressing member is adjusted so that the axis of the cylindrical gauge in this state coincides with the rotation center axis of the main shaft. It is effective.
【００１７】加えて、本発明の第１の電子写真装置用の
ドラム基体の製造方法は、管材を切断して所定長さの円
筒体を作製し、前記円筒体の端部近傍の外周面を周方向
に互いに間隔をおいた少なくとも３箇所にて前記周方向
に線接触する当接部材で締め付けることによって前記円
筒体を弾性変形域内の変形を保つ状態で固定しておき、
切削工具を支持してその回転中心軸線のまわりに回転さ
せる主軸を備えるとともに該回転中心軸線に沿って移動
する切削手段により、前記円筒体の端部の内周面および
端面を切削加工するものである。In addition, according to the first method of manufacturing a drum base for an electrophotographic apparatus of the present invention, a tube is cut to form a cylinder having a predetermined length, and an outer peripheral surface near an end of the cylinder is cut. The cylindrical body is fixed in a state where deformation within the elastic deformation area is maintained by tightening with a contact member that makes line contact in the circumferential direction at at least three places spaced apart from each other in the circumferential direction,
The cutting tool is provided with a main shaft that supports a cutting tool and rotates around a rotation center axis thereof, and cuts an inner peripheral surface and an end surface of an end portion of the cylindrical body by cutting means that moves along the rotation center axis. is there.
【００１８】また、第２の電子写真装置用のドラム基体
の製造方法は、管材を切断して所定長さの円筒体を作製
し、前記円筒体内に中子を挿入した状態で、前記円筒体
の端部近傍の外周面を周方向に互いに間隔をおいて少な
くとも３箇所にて前記周方向に線接触する当接部材で締
め付けることにより前記円筒体を弾性変形域内の変形を
保つ状態で固定しておき、切削工具を支持してその回転
中心軸線のまわりに回転させる主軸を備えるとともに該
回転中心軸線に沿って移動する切削工具により、前記円
筒体の端部の内周面および端面を切削加工することを特
徴とするものである。In a second method of manufacturing a drum base for an electrophotographic apparatus, a cylindrical member having a predetermined length is formed by cutting a tube, and a core is inserted into the cylindrical member. The cylindrical body is fixed in a state where the deformation within the elastic deformation area is maintained by tightening the outer peripheral surfaces near the end of the cylindrical body at at least three places spaced apart from each other in the circumferential direction with the contact members that are in line contact with the circumferential direction. In addition, an inner peripheral surface and an end surface of the end portion of the cylindrical body are cut by a cutting tool that has a main shaft that supports the cutting tool and rotates around the rotation center axis and moves along the rotation center axis. It is characterized by doing.
【００１９】さらに、本発明の円筒体の加工装置は、切
削工具を支持してその回転中心軸線のまわりに回転させ
る主軸を備えるとともに該回転中心軸線に沿って移動自
在な切削手段と、前記切削工具に対して円筒体の端部を
対向させて保持する保持治具とを備えた円筒体の加工装
置であって、前記保持治具は、前記円筒体をまわりから
締め付けるための少なくとも２個の押圧部材と、該押圧
部材の前記円筒体側の面に設けられた前記円筒体の外周
面を周方向に互いに間隔をおいた少なくとも３箇所にて
前記周方向に線接触する当接部材と、前記当接部材の中
心軸線を前記主軸の回転中心軸線に一致するように前記
押圧部材を位置決めするための押圧部材位置決め手段
と、前記押圧部材の少なくとも１つを円筒体に押圧する
ための駆動手段とを備えたことを特徴とするものであ
る。Further, the apparatus for processing a cylindrical body according to the present invention comprises a main shaft for supporting a cutting tool and rotating the main body about a rotation center axis thereof, and a cutting means movable along the rotation center axis; And a holding jig for holding an end of the cylindrical body facing the tool, wherein the holding jig includes at least two holding jigs for tightening the cylindrical body from around. A pressing member, and an abutting member that makes a line contact in the circumferential direction at at least three places with an outer circumferential surface of the cylindrical body provided on the surface of the pressing member on the side of the cylindrical body spaced apart from each other in the circumferential direction; Pressing member positioning means for positioning the pressing member so that the center axis of the contact member coincides with the rotation center axis of the main shaft; and driving means for pressing at least one of the pressing members against a cylindrical body. To And it is characterized in that there was example.
【００２０】[0020]
【作用】円筒体の端部近傍の外周面を周方向に互いに間
隔をおいた少なくとも３箇所の部位に前記周方向に線接
触する保持治具の当接部材で押圧して部分的に円筒体の
弾性変形域内の変形を保った状態で固定するので、円筒
体がその軸心がずれることもなく大きな摩擦力で固定さ
れ、高速、高精度の端部の切削加工ができる。The outer peripheral surface in the vicinity of the end of the cylindrical body is partially pressed by the contact member of the holding jig which is linearly contacted with at least three portions spaced apart from each other in the circumferential direction. Since the cylindrical body is fixed while maintaining its deformation within the elastic deformation region, the cylindrical body is fixed with a large frictional force without displacement of its axis, and high-speed, high-precision cutting of the end can be performed.
【００２１】[0021]
【実施例】本発明の実施例を図面に基いて説明する。An embodiment of the present invention will be described with reference to the drawings.
【００２２】先ず、本発明の方法によって製造された電
子写真装置用のドラム基体について説明する。First, a drum substrate for an electrophotographic apparatus manufactured by the method of the present invention will be described.
【００２３】図１は、電子写真方式の画像形成装置にお
ける感光ドラム用のドラム基体の模式断面図であって、
感光ドラム用のドラム基体１の両端部の端面２および端
部内周面３は高精度に切削加工されているとともに、外
径面取り部４および内径面取り部５が面取り加工されて
いる。つまり、前記ドラム基体１の端部には、上述した
ような回転力伝達部材を嵌合するための嵌合部が形成さ
れている。FIG. 1 is a schematic sectional view of a drum base for a photosensitive drum in an electrophotographic image forming apparatus.
The end surface 2 and the inner peripheral surface 3 at both ends of the drum base 1 for the photosensitive drum are cut with high precision, and the outer diameter chamfered portion 4 and the inner diameter chamfered portion 5 are chamfered. That is, a fitting portion for fitting the above-described torque transmitting member is formed at the end of the drum base 1.
【００２４】図２は、電子写真方式の画像形成装置にお
ける現像スリーブ用のドラム基体を一部断面で示す平面
図であって、図１に示す感光ドラム用の基体の外径の約
半分の外径の現像スリーブ用のドラム本体１１ａの図示
右端部にボス１５が前工程において接合され、その外周
部が高精度に切削加工されているとともに、図示左端部
の端面１２および端部内周面１３が高精度に切削加工さ
れている。つまり、ドラム基体１１の端部には、上述の
ような回転力伝達部材を嵌合する嵌合部が形成されてい
る。FIG. 2 is a plan view showing a drum substrate for a developing sleeve in an electrophotographic image forming apparatus in a partial cross section. The outer diameter of the drum substrate is approximately half the outer diameter of the photosensitive drum substrate shown in FIG. A boss 15 is joined to the right end of the drum main body 11a for a developing sleeve having a diameter in the previous process, and the outer periphery thereof is cut with high precision, and the end surface 12 of the left end and the inner peripheral surface 13 of the end are formed. It is cut with high precision. That is, a fitting portion for fitting the above-described torque transmitting member is formed at the end of the drum base 11.
【００２５】次に、本発明の円筒体の加工方法の実施に
使用する加工装置について説明する。Next, a processing apparatus used for carrying out the method for processing a cylindrical body according to the present invention will be described.
【００２６】図３は、本発明の円筒体の加工装置の一実
施例の模式立面図、図４は、図３に示す加工装置の主要
部を示し、（Ａ）は一方の主軸台側からみた一部破断側
面図、（Ｂ）は（Ａ）のＢ−Ｂ線に沿う部分断面図であ
る。FIG. 3 is a schematic elevational view of an embodiment of the processing apparatus for a cylindrical body according to the present invention. FIG. 4 shows a main part of the processing apparatus shown in FIG. FIG. 2B is a partial cross-sectional view taken along line BB of FIG.
【００２７】ベッド２０の上面には間隔をおいて一対の
スライダ２１ａ，２１ｂが配設されており、各スライダ
２１ａ，２１ｂには互いに対向するようにそれぞれ切削
手段である主軸台２２ａ，２２ｂが支持されている。ベ
ッド２０の上面の前記スライダ２１ａ，２１ｂの間には
ブロック３６が固定されており、ブロック３６の両側近
傍には一対の門型コラム２４ａ，２４ｂが前記スライダ
２１ａ，２１ｂと干渉しない部位に立設されている。A pair of sliders 21a and 21b are provided on the upper surface of the bed 20 at intervals, and headstocks 22a and 22b serving as cutting means are supported on the sliders 21a and 21b so as to face each other. Have been. A block 36 is fixed between the sliders 21a and 21b on the upper surface of the bed 20, and a pair of portal columns 24a and 24b are erected near both sides of the block 36 at locations where they do not interfere with the sliders 21a and 21b. Have been.
【００２８】本加工装置は、各主軸台２２ａ，２２ｂに
それぞれ対向して配設された同一構造の２個の保持治具
によって円筒体であるワーク３０の端部近傍を後述する
方法により固定して保持するものである。このため、一
方の保持治具について説明し、他方の保持治具の説明は
省略する。In this processing apparatus, the vicinity of the end of the cylindrical work 30 is fixed by a method described later by two holding jigs of the same structure which are disposed opposite to the headstocks 22a and 22b, respectively. It is what you hold. Therefore, only one holding jig will be described, and description of the other holding jig will be omitted.
【００２９】一方の門型コラム２４ａには押圧部材の駆
動手段である流体圧シリンダ２６ａが一体的に設けられ
たガイド２５ａが支持されており、ガイド２５ａの図示
しない案内部には上側ベース３１ａに突設された複数の
案内棒２７ａが摺動自在に嵌挿され、上側ベース３１ａ
には流体圧シリンダ２６ａのピストンロッド２８ａが結
合されている。上側ベース３１ａの主軸台２２ａと対向
する面に形成されたガイド溝３７ａには、一方の押圧部
材である上駒３５ａが摺動自在に嵌合されており、複数
のボルト３８ａにより上側ベース３１ａに対して所定の
位置に固定できるように構成されている。A guide 25a integrally provided with a fluid pressure cylinder 26a as driving means for a pressing member is supported on one portal column 24a, and a guide portion (not shown) of the guide 25a is provided on the upper base 31a. A plurality of protruding guide rods 27a are slidably inserted into the upper base 31a.
Is connected to a piston rod 28a of a fluid pressure cylinder 26a. An upper piece 35a, which is one pressing member, is slidably fitted in a guide groove 37a formed on a surface of the upper base 31a facing the headstock 22a, and is fixed to the upper base 31a by a plurality of bolts 38a. It is configured so that it can be fixed at a predetermined position.
【００３０】他方、ブロック３６の主軸台側の上縁部に
沿って形成されたガイド溝３９ａには、下側ベース３２
ａが摺動自在に嵌合されており、複数のボルト４１ａに
よりブロック３６に対し所定の位置に固定できるように
構成されているとともに、下側ベース３２ａの主軸台２
２ａと対向する面に形成されたガイド溝４０ａには、他
方の押圧部材である下駒３４ａが摺動自在に嵌合され、
複数のボルト４２ａにより下側ベース３２ａに対して所
定の位置に固定できるように構成されている。On the other hand, a guide groove 39a formed along the upper edge of the block 36 on the headstock side has a lower base 32
a is slidably fitted, is configured to be fixed at a predetermined position with respect to the block 36 by a plurality of bolts 41a, and the headstock 2 of the lower base 32a is
A lower piece 34a, which is the other pressing member, is slidably fitted in a guide groove 40a formed on a surface facing 2a.
The lower base 32a can be fixed at a predetermined position by a plurality of bolts 42a.
【００３１】図５に示すように、上駒３５ａの下端面に
形成された穴には当接部材である円筒ピン３３ａが圧入
されて固定されており、円筒ピン３３ａの外周面の一部
が外方へ突出している。下駒３４ａの上面には略Ｖ字状
の切欠部が形成されており、その両傾斜面４３ａ，４４
ａにそれぞれ形成された穴には円筒ピン３３ａが圧入さ
れて固定されており、各円筒ピン３３ａの外周面の一部
がそれぞれ外方へ突出している。これにより、円筒体で
あるワーク３０と各円筒ピン３３ａとはワーク３０の外
周面を周方向に間隔をおいた少なくとも３箇所にて前記
周方向に線接触する当接部材が構成されている。As shown in FIG. 5, a cylindrical pin 33a as a contact member is press-fitted and fixed in a hole formed in the lower end surface of the upper block 35a, and a part of the outer peripheral surface of the cylindrical pin 33a is fixed. It protrudes outward. A substantially V-shaped notch is formed on the upper surface of the lower block 34a, and both inclined surfaces 43a, 44 are formed.
A cylindrical pin 33a is press-fitted and fixed in each of the holes formed in each of the cylindrical pins 33a, and a part of the outer peripheral surface of each cylindrical pin 33a protrudes outward. Thereby, the contact member which makes line contact in the circumferential direction at at least three places on the outer peripheral surface of the work 30 in the circumferential direction is formed between the cylindrical work 30 and each cylindrical pin 33a.
【００３２】図７は、上記円筒ピンに替えて鼓形ピン７
３ａを用いた変形例を示し、その他の部分は上述の円筒
ピンを設けたものと同様でよいのでその説明は省略す
る。本変形例によると円筒ピンに比較してワーク３０と
の線接触長さが長くなる。FIG. 7 shows an hourglass pin 7 in place of the cylindrical pin.
A modified example using 3a is shown, and the other parts may be the same as those provided with the above-described cylindrical pin, and thus description thereof will be omitted. According to this modification, the line contact length with the work 30 is longer than that of the cylindrical pin.
【００３３】図６は、主軸台の主軸に取付けられたバイ
トホルダを示し、（Ａ）はその側面図、（Ｂ）はその正
面図である。FIGS. 6A and 6B show a bite holder attached to the spindle of the headstock, wherein FIG. 6A is a side view and FIG. 6B is a front view.
【００３４】主軸台２２ａの主軸２３ａの中心孔にはバ
イトホルダ６０ａの基準円筒部５１ａが嵌合され、その
フランジ６１ａを複数のボルト６２ａにより締付けるこ
とによって固定されている。バイトホルダ６０ａの自由
端は大径部と小径部からなり、小径部には内径バイト５
２ａ、大径部には端面バイト５３ａ、内径面取りバイト
５４ａおよび外径面取りバイト５５ａがそれぞれ公知の
手段により取付けられるように構成されている。A reference cylindrical portion 51a of a tool holder 60a is fitted into a center hole of the spindle 23a of the headstock 22a, and is fixed by tightening a flange 61a of the spindle holder with a plurality of bolts 62a. The free end of the bite holder 60a has a large diameter portion and a small diameter portion, and the small diameter portion has an inner diameter bite 5
2a, an end face cutting tool 53a, an inner diameter chamfering tool 54a, and an outer diameter chamfering tool 55a are attached to the large diameter portion by known means.
【００３５】次に、本発明の電子写真装置用のドラム基
体の製造方法の実施例について説明する。Next, an embodiment of the method of manufacturing a drum substrate for an electrophotographic apparatus according to the present invention will be described.
【００３６】予め、押出しまたは引抜き等により製造さ
れた長尺の管材を所定の長さに切断してワーク３０を作
製しておく。A long pipe material manufactured by extrusion or drawing is cut in advance to a predetermined length to prepare a work 30.
【００３７】前記ワーク３０を保持治具で支持する前
に、後述する方法によって上駒３５ａおよび下駒３４ａ
の位置決めを行っておき、流体圧シリンダ２６ａにより
ピストンロッド２８ａを引込めて上側ベース３１ａとと
もに上駒３５ａを引上げて下側ベース３２ａから充分離
間させる。ついで、下駒３４ａの両円筒ピン３３ａ上に
ワーク３０を載置し、前記ピストンロッド２８ａを突出
することにより上側ベース３１ａとともに上駒３５ａを
下降させると、上駒３５ａの円筒ピン３３ａがワーク３
０に当接するが、このとき上側ベース３１ａの下端面と
下側ベース３２ａの上端面との間には間隙Ｇが生じる
（図４参照）。Before the work 30 is supported by the holding jig, the upper and lower pieces 35a and 34a
And the piston rod 28a is retracted by the fluid pressure cylinder 26a, and the upper block 35a is pulled up together with the upper base 31a so as to be separated from the lower base 32a. Next, the work 30 is placed on both cylindrical pins 33a of the lower block 34a, and the upper block 35a is lowered together with the upper base 31a by projecting the piston rod 28a.
However, at this time, a gap G is generated between the lower end surface of the upper base 31a and the upper end surface of the lower base 32a (see FIG. 4).
【００３８】さらに、上側ベース３１ａを下降させて下
側ベース３２ａに当接させるとワーク３０はその外周面
を周方向にほぼ等間隔に３箇所に分割した部位が前記周
方向に線接触する各円筒ピン３３ａにより押圧されて部
分的にほぼ等しい量だけ弾性変形域内で変形し、両者間
に発生する大きな摩擦力で固定される。この弾性変形域
内の変形量は前記間隙Ｇの大きさで決まるので、予め間
隙Ｇはワークの弾性変形域の範囲内に設定する。Further, when the upper base 31a is lowered and brought into contact with the lower base 32a, the work 30 is divided into three parts at an equal interval in the circumferential direction at substantially equal intervals in the circumferential direction. It is pressed by the cylindrical pin 33a and is partially deformed in the elastic deformation region by substantially the same amount, and is fixed by a large frictional force generated between the two. Since the amount of deformation in this elastic deformation area is determined by the size of the gap G, the gap G is set in advance within the range of the elastic deformation area of the work.
【００３９】ついで、スライダ２１ａとともに主軸台２
２ａをワーク３０に向けて移動させ、前述の図６に示す
内径バイト５２ａ、端面バイト５３ａ、内径面取りバイ
ト５４ａ、外径面取りバイト５５ａ（ワーク３０の他方
の端部も同様である）によりワークの端部を切削加工す
る。なお、いうまでもないが、ワーク３０の他方側もこ
れと同様にして切削加工する。Next, the headstock 2 together with the slider 21a
The workpiece 2a is moved toward the workpiece 30, and the workpiece is moved by the inner diameter tool 52a, the end face tool 53a, the inner face chamfer tool 54a, and the outer face chamfer tool 55a shown in FIG. 6 (the same applies to the other end of the workpiece 30). Cut the end. Needless to say, the other side of the work 30 is cut in the same manner.
【００４０】また、押圧部材は本実施例の上下２個に限
らず、３個以上とすることができ、これに対応して当接
部材も４個以上設けて、円筒体の外周面を互いに間隔を
おいた４箇所以上にて締め付けるように構成することも
できる。Further, the pressing members are not limited to the two upper and lower members in this embodiment, but may be three or more members. Correspondingly, four or more abutting members are provided so that the outer peripheral surfaces of the cylindrical body can be separated from each other. It may be configured to be tightened at four or more places at intervals.
【００４１】図８は、本発明の電子写真装置用のドラム
基体の製造方法の第２実施例を示し、ワーク３０の内部
に中子７０を挿入しておき、中子７０とともにワーク３
０を弾性変形域内で変形させて固定する点が第１実施例
と異なる。本実施例はワーク３０の肉厚寸法が０．７５
ｍｍより薄いものや、肉厚寸法に比較して外径寸法が大
きなものに対して、所定の保持力が弱くならないように
工夫されたものである。FIG. 8 shows a second embodiment of the method of manufacturing a drum base for an electrophotographic apparatus according to the present invention, in which a core 70 is inserted into a work 30 and a work 3 is inserted together with the core 70.
0 is deformed and fixed in the elastic deformation area, which is different from the first embodiment. In this embodiment, the thickness of the work 30 is 0.75.
It is devised so that a predetermined holding force is not weakened for a material having a smaller outer diameter than a thickness smaller than mm or a wall thickness.
【００４２】中子７０は、その外径がワーク３０に挿通
できる大きさとし、その剛性がワーク３０より大きけれ
ば中実または中空を問わないが、中空の場合は肉厚寸法
がワークの肉厚寸法以上とすることが望ましい。The core 70 has a size such that the outer diameter thereof can be inserted into the work 30. If the rigidity is larger than the work 30, the core 70 may be solid or hollow. It is desirable to make the above.
【００４３】本実施例では、中子７０を挿通したワーク
３０は中子７０を一体化して弾性変形域内の変形を保っ
た状態で固定されるため保持状態が安定する。その他の
各工程は第１実施例と同様であるのでその説明は省略す
る。In this embodiment, the work 30 into which the core 70 is inserted is fixed while the core 70 is integrated and the deformation within the elastic deformation area is maintained, so that the holding state is stable. The other steps are the same as those in the first embodiment, and a description thereof will be omitted.
【００４４】本発明においてワークを支持固定するワー
クの両端部近傍は、ワーク外径をＤで表わすと１．５Ｄ
〜２Ｄの範囲内が望ましい。In the present invention, the vicinity of both ends of the work for supporting and fixing the work is 1.5D when the outside diameter of the work is represented by D.
It is desirable to be within the range of 2D.
【００４５】支持固定する位置が１．５Ｄよりも端面寄
りにすると、ワークが弾性変形域内で変形したときワー
ク端部の真円度が損われる場合が生じる。If the position for supporting and fixing is closer to the end face than 1.5D, the roundness of the end of the work may be impaired when the work is deformed within the elastic deformation range.
【００４６】また、支持固定する位置が２Ｄよりも中央
部寄りにすると、ワークの両端部の切削加工時の曲げモ
ーメントが大きくなり、ワークの両端部の曲がりが発生
して加工精度が低下する場合がある。If the position for supporting and fixing is closer to the center than 2D, the bending moment at the time of cutting at both ends of the work becomes large, and the bending of both ends of the work occurs to reduce the processing accuracy. There is.
【００４７】本発明の方法と前記従来の（ロ）の方法と
の比較実験を行ったので、その結果を次に説明する。A comparative experiment was conducted between the method of the present invention and the conventional method (b), and the results will be described below.
【００４８】実験に用いたワークは、外径が１６．１５
±０．０２ｍｍ、肉厚が０．７５ｍｍのアルミニウム合
金製［ＪＩＳ３００３（Ｃｕ０．０５〜０．２０％、Ｍ
ｎ１．０〜１．５％、残Ａｌ）］の長尺の管材を長さ２
４８ｍｍに切断したものである。The work used in the experiment had an outer diameter of 16.15.
Made of an aluminum alloy with a thickness of ± 0.02 mm and a thickness of 0.75 mm [JIS3003 (Cu 0.05 to 0.20%, M
n 1.0-1.5%, residual Al)].
It was cut to 48 mm.
【００４９】各５本のワークをそれぞれ図９に示すＳ点
において、本発明の支持治具で支持した場合と、従来例
のＶブロックと押え部材とで支持した場合について、図
９に示すワークの軸方向の中心点Ｃを基準とし、両端部
のＡ点およびＢ点の高さを測定した。その結果を表１お
よび表２に示す。ここで、Ｓ点はワーク両端面から２５
ｍｍの距離の部位とし、Ａ点およびＢ点はワーク両端面
から１０ｍｍの距離の部位とした。The work shown in FIG. 9 shows the case where each of the five works is supported by the support jig of the present invention at point S shown in FIG. 9 and the case where it is supported by the V-block and the pressing member of the conventional example. With reference to the center point C in the axial direction, the heights of the points A and B at both ends were measured. The results are shown in Tables 1 and 2. Here, point S is 25 mm from both ends of the work.
mm, and points A and B were 10 mm from both ends of the work.
【００５０】また、上側ベースと下側ベースの前記間隙
Ｇの設定は次の方法で行い、約０．０２ｍｍに設定し
た。The gap G between the upper base and the lower base was set by the following method, and was set to about 0.02 mm.
【００５１】上駒および下駒はボルトをゆるめて移動自
在にしておき、外径１６．１１ｍｍ、長さ２４８ｍｍの
ゲージを下側ベースの下駒上に載置し、上側ベースを下
降させて下側ベースに当接させる。この状態で前記ボル
トを締付けて上駒および下駒をそれぞれ固定した。これ
により、ワークに下降する上駒が接触したとき上側ベー
スと下側ベースとの前記間隙Ｇが約０．０２ｍｍに設定
される。The upper and lower pieces are made movable by loosening the bolts, and a gauge having an outer diameter of 16.11 mm and a length of 248 mm is placed on the lower piece of the lower base, and the upper base is lowered to lower the lower piece. Abut the side base. In this state, the bolts were tightened to fix the upper and lower pieces, respectively. Thus, the gap G between the upper base and the lower base is set to about 0.02 mm when the lower piece contacts the workpiece.
【００５２】[0052]
【表１】 [Table 1]
【００５３】[0053]
【表２】 表１は本発明の方法による場合、表２は上記従来の
（ロ）の方法による場合のデータを示し、支持治具の欄
の閉はワークを押圧して支持固定したとき、開はワーク
を押圧しないときを表わす。[Table 2] Table 1 shows data in the case of the method according to the present invention, and Table 2 shows data in the case of the above-mentioned conventional method (b). Indicates when not pressed.
【００５４】表１および表２から明らかなように、本発
明の方法ではワークの両端部の曲がりが非常に少なくな
っている。As is clear from Tables 1 and 2, in the method of the present invention, the bending at both ends of the work is extremely small.
【００５５】次に、本発明の方法と上記従来の（ロ）の
方法とによりそれぞれ両端部を切削加工したワークを、
ワークの両端部を支持して回転させ、その外周面を切削
加工したのち、ワーク端部（図９のＡ点に相当する部
位）に対するワーク中心点（図９のＣ点に相当する部
位）の振れを測定したので、その結果を表３に示す。Next, the workpieces whose both ends are cut by the method of the present invention and the conventional method (b) are
After supporting and rotating both ends of the work and cutting the outer peripheral surface thereof, the work center point (the part corresponding to point C in FIG. 9) with respect to the work end (the part corresponding to point A in FIG. 9). The run-out was measured, and the results are shown in Table 3.
【００５６】[0056]
【表３】 表３から明らかなように、本発明の方法によると上記従
来の（ロ）の方法に比較してワークの真直度が大幅に向
上している。[Table 3] As is clear from Table 3, according to the method of the present invention, the straightness of the workpiece is greatly improved as compared with the above-mentioned conventional method (b).
【００５７】（実施例１）上述した図３およひ図４に示
した加工装置を使用して、次に記載するような外径寸
法、肉厚寸法、長さ寸法および管材の軸方向の真直度
（曲がり）のアルミニウム合金製の管材の両端部の内周
面の切削加工を行った。Example 1 Using the processing apparatus shown in FIG. 3 and FIG. 4 described above, the outer diameter, wall thickness, length, and axial direction The inner peripheral surfaces of both ends of a straightness (bent) aluminum alloy tube were cut.
【００５８】 外径寸法 １６．１１ｍｍ 肉厚寸法 ０．７５ｍｍ 長さ寸法 ２４８．００ｍｍ 管材の軸方向の真直度（曲がり） ３０μｍ 円筒体であるワークを固定する前の下駒と上駒とを位置
決めするための調整は、次のａ乃至ｆの手順で行った。Outer diameter dimension 16.11 mm Wall thickness dimension 0.75 mm Length dimension 248.00 mm Straightness (bending) in the axial direction of the pipe material 30 μm Positioning the lower and upper pieces before fixing a cylindrical work. The adjustment for the adjustment was performed in the following steps a to f.
【００５９】 ａ 下駒を保持する下側ベースのボルトを緩めておき、 ｂ 下駒のＶ字状の切欠部の両傾斜面に固定されている
円筒ピン上にゲージ部材を載せる。このゲージ部材は剛
性が大きな中実のものであって、その外径寸法はワーク
の外径寸法より該ワークを弾性変形域内の変形を保つ状
態で固定した際の変形量よりも小さい寸法の（１６．１
１ｍｍ〜０．０２ｍｍ）に仕上げ加工されている。A) Loosen the bolt of the lower base that holds the lower bridge, and b. Place the gauge member on the cylindrical pins fixed to both inclined surfaces of the V-shaped notch of the lower bridge. The gauge member is a solid member having a large rigidity, and its outer diameter is smaller than the outer diameter of the work when the work is fixed while maintaining the deformation in the elastic deformation range. 16.1
(1 mm to 0.02 mm).
【００６０】ｃ 次に、前記ゲージ部材の軸線と主軸台
の主軸の回転中心軸線とを一致させて、この状態で前記
ボルトを締め付けて固定する。C) Next, the axis of the gauge member and the rotation center axis of the spindle of the headstock are made to coincide with each other, and in this state, the bolt is tightened and fixed.
【００６１】ｄ ついで、上駒を固定する上側ベースの
ボルトを緩めておいて下降させ、上側ベースと下側ベー
スのつき当たり部が間隙Ｇを生じることなく接触した状
態で、前記ボルトを締め付けて固定する。D. Then, the bolt of the upper base for fixing the upper block is loosened and lowered, and the bolt is tightened in a state where the contact portions of the upper base and the lower base are in contact with each other without a gap G. Fix it.
【００６２】ｅ 上記ｄののち、流体圧シリンダのピス
トンの移動ストロークを不図示の位置検出手段によって
検出しておく。この位置検出手段によって検出される信
号は、ワークを弾性変形域内で変形を保つ状態で固定す
る際の流体圧シリンダの出力検出に使用する。E After the above d, the movement stroke of the piston of the fluid pressure cylinder is detected by a position detecting means (not shown). The signal detected by the position detecting means is used for detecting the output of the fluid pressure cylinder when the workpiece is fixed while maintaining the deformation within the elastic deformation area.
【００６３】ここで、前記ゲージ部材の軸線と主軸の回
転中心軸線とを一致させる方法としては、主軸に電気マ
イクロメータを取付け、主軸を回転させて前記電気マイ
クロメータの針の振れを所定の振れ範囲内（例えば５〜
１０μｍ）になるようにする。Here, as a method for making the axis of the gauge member coincide with the rotation center axis of the main shaft, an electric micrometer is attached to the main shaft, and the main shaft is rotated to reduce the needle deflection of the electric micrometer to a predetermined deflection. Within the range (for example, 5
10 μm).
【００６４】下駒と上駒とを上述の手順によって位置決
めしたのち、前記ゲージ部材にかえてワークを保持治具
の円筒ピンの押圧力により、０．０２ｍｍの弾性変形域
内の変形量を生じるように保持した。After positioning the lower piece and the upper piece by the above-described procedure, the work is changed to the above-mentioned gauge member so that the work is pressed by the cylindrical pin of the holding jig so that a deformation amount within the elastic deformation area of 0.02 mm is generated. Held.
【００６５】そして、バイトホルダに内径バイトを取付
けて主軸の回転数を５０００ｒｐｍに設定し、主軸の回
転中心軸線に沿って送りをかけてワークの端部の内周面
の切削加工を行ったところ、内周加工面の加工仕上がり
は良好であった。さらに、主軸の回転数を１００００ｒ
ｐｍに上げて切削加工したところ、ワークの保持状態お
よび加工仕上がりに不具合は生じなかった。Then, an inner diameter bite was attached to the bite holder, the number of revolutions of the spindle was set to 5000 rpm, and feed was performed along the axis of rotation of the spindle to cut the inner peripheral surface of the end portion of the work. In addition, the processing finish of the inner peripheral processing surface was good. Further, the rotation speed of the main shaft is set at 10,000 r.
When the cutting was performed at a speed of up to pm, no problems occurred in the holding state of the work and the processing finish.
【００６６】（実施例２）ワークおよび加工装置は実施
例１と同様であり、保持治具によるワークの保持も実施
例１と同様の手順で行った。(Example 2) The work and the processing apparatus were the same as those in Example 1, and the work was held by the holding jig in the same procedure as in Example 1.
【００６７】そして、バイトホルダに内径バイトに加え
て、内径面取りバイト、外径面取りバイトおよび端面バ
イトを取付けて主軸の回転数を所定の回転数に設定し
て、主軸の回転中心軸線に沿って送りをかける。すると
ワークは、先ず内径バイトによって端部の内周面が切削
加工され、内周面に設計上の距離に至る手前で、端面バ
イトによる端面の切削加工が開始される。ついで、端面
バイトによる端面の所定切削量に至る直前の位置から外
周面取りバイトおよび内周面取りバイトによる外径面取
り部および内径面取り部の面取り加工が行われる。Then, in addition to the inner diameter tool, an inner diameter chamfering tool, an outer diameter chamfering tool, and an end face tool are attached to the tool holder, and the number of revolutions of the main spindle is set to a predetermined number of revolutions. To send. Then, the inner peripheral surface of the end of the work is first cut by the inner diameter cutting tool, and the cutting of the end surface by the end cutting tool is started just before the inner peripheral surface reaches a design distance. Next, the outer diameter chamfering portion and the inner diameter chamfering portion are chamfered by the outer peripheral chamfering tool and the inner peripheral chamfering tool from a position immediately before reaching a predetermined cutting amount of the end face by the end face tool.
【００６８】この実施例２の場合、ワークの端部の内周
面、端面、外周面取りおよび内周面取りの切削加工を一
度に行うことができるとともに、ワークの軸方向の長さ
寸法、ワークの軸心に対する端面の角度を高精度に加工
できるため、上述した電子写真装置用の感光ドラムや現
像スリーブ等のドラム基体の製造に適している。In the second embodiment, the inner peripheral surface, the end surface, the outer peripheral chamfer and the inner peripheral chamfer of the end of the work can be cut at a time, and the length of the work in the axial direction, the work length of the work, and the like can be reduced. Since the angle of the end face with respect to the axis can be processed with high accuracy, it is suitable for manufacturing a drum base such as a photosensitive drum or a developing sleeve for an electrophotographic apparatus described above.
【００６９】（実施例３）この実施例３は、射出成形ま
たは押出成形によって成形された外周面の仕上げ精度お
よび真直度を確保した樹脂製の管材により、電子写真装
置用の感光ドラム用のドラム基体を製造するものであ
る。(Embodiment 3) In this embodiment 3, a photosensitive drum for an electrophotographic apparatus is manufactured by using a resin-made tube material which ensures finishing accuracy and straightness of an outer peripheral surface formed by injection molding or extrusion molding. A substrate is manufactured.
【００７０】ワークである樹脂製の円筒体の樹脂材料
は、熱硬化性樹脂のポリフェニレンサンファイドおよび
ポリエーテルケトンサルフォンにガラス繊維を混入した
材料を用いた。また、ワークの各寸法は次のとおりであ
る。The resin material of the resin cylindrical body used as the work was a material obtained by mixing glass fibers with polyphenylene sulfide and polyether ketone sulfone, which are thermosetting resins. The dimensions of the work are as follows.
【００７１】 外径寸法 ４０．００ｍｍ 肉厚寸法 ５．００ｍｍ 長さ寸法 ２４８．００ｍｍ 円筒体の軸方向の真直度 ３０μｍ 加工装置の保持治具の下駒と上駒とを位置決めするため
の調整は、ワークの外径寸法４０．００ｍｍから樹脂材
料の場合の弾性変形域内の変形の変形量０．０４ｍｍ差
し引いた値の外径のゲージ部材を用い、実施例１と同様
の手順で行った。Outer diameter dimension 40.00 mm Wall thickness dimension 5.00 mm Length dimension 248.00 mm Straightness in the axial direction of the cylindrical body 30 μm Adjustment for positioning the lower and upper pieces of the holding jig of the processing device The same procedure as in Example 1 was performed using a gauge member having an outer diameter of a value obtained by subtracting 0.04 mm of the deformation amount in the elastic deformation range in the case of the resin material from the outer diameter dimension of the work of 40.00 mm.
【００７２】下駒と上駒とを位置決めしたのち、前記ゲ
ージ部材にかえてワークを押圧部材の円筒ピンの押圧力
により０．０４ｍｍの弾性変形域内の変形量を保つよう
に固定した。After positioning the lower piece and the upper piece, the work was replaced with the gauge member and the work was fixed by the pressing force of the cylindrical pin of the pressing member so as to maintain the deformation within the elastic deformation area of 0.04 mm.
【００７３】そして、バイトホルダに内径バイトを取付
けて主軸の回転数を４０００〜６０００ｒｐｍに設定し
てワークの端部の内周面の切削加工を行った。Then, an inner diameter bite was attached to the bite holder, and the number of revolutions of the main spindle was set to 4000 to 6000 rpm to cut the inner peripheral surface at the end of the work.
【００７４】加工済のワークを加工装置より取り外して
真直度を検査したところ、加工前の真直度３０μｍを維
持していた。また、実際に図１３に示した複写機と同様
にフランジギアを取付けて組付けたところ、正確に組付
けることができ現像スリーブとの距離を回転中も一定に
保つことができた。When the straightness was inspected by removing the processed work from the processing apparatus, the straightness before processing was maintained at 30 μm. Further, when the flange gear was actually mounted and assembled in the same manner as in the copying machine shown in FIG. 13, the assembly was accurate and the distance from the developing sleeve could be kept constant during rotation.
【００７５】[0075]
【発明の効果】本発明は上述のとおり構成されているの
で、次に記載するような効果を奏する。Since the present invention is configured as described above, the following effects can be obtained.
【００７６】固定時に円筒体の軸心のずれがない上、円
筒体が振動することもないので円筒体端部の高精度でし
かも高速の切削加工ができる。このため、外径寸法精度
や表面精度が普通の管材が使用可能となり製造コストが
低減する。There is no displacement of the axis of the cylindrical body when fixed, and there is no vibration of the cylindrical body, so that the end of the cylindrical body can be cut with high precision and at high speed. For this reason, a pipe material having ordinary outer diameter dimensional accuracy and surface accuracy can be used, and the manufacturing cost is reduced.
【００７７】また、中子を挿入することにより、比較的
薄肉の円筒体でもその両端部の高精度でしかも高速の切
削加工ができる。Further, by inserting the core, even a relatively thin cylindrical body can be cut with high precision and at high speed at both ends thereof.
【図１】電子写真方式の画像形成装置における感光ドラ
ム用のドラム基体の模式断面図である。FIG. 1 is a schematic sectional view of a drum base for a photosensitive drum in an electrophotographic image forming apparatus.
【図２】電子写真方式の画像形成装置における現像スリ
ーブ用のドラム基体を一部断面で示す模式平面図であ
る。FIG. 2 is a schematic plan view partially showing a drum base for a developing sleeve in an electrophotographic image forming apparatus.
【図３】本発明の加工装置の一実施例を示す模式立面図
である。FIG. 3 is a schematic elevation view showing one embodiment of the processing apparatus of the present invention.
【図４】図３に示す加工装置の主要部を示し、（Ａ）は
一方の主軸台側からみた一部破断側面図、（Ｂ）は
（Ａ）のＢ−Ｂ線に沿う部分断面図である。4A and 4B show a main part of the processing apparatus shown in FIG. 3, in which FIG. 4A is a partially cutaway side view seen from one headstock side, and FIG. 4B is a partial cross-sectional view along line BB of FIG. It is.
【図５】図３に示す加工装置の支持治具の主要部を示
し、（Ａ）は側面図、（Ｂ）は（Ａ）のＡ−Ａ線に沿う
断面図である。5A and 5B show a main part of a support jig of the processing apparatus shown in FIG. 3, wherein FIG. 5A is a side view, and FIG. 5B is a cross-sectional view taken along line AA of FIG.
【図６】図３に示す加工装置のバイトホルダを示し、
（Ａ）はその立面図、（Ｂ）は側面図である。6 shows a tool holder of the processing device shown in FIG. 3,
(A) is its elevation view, (B) is a side view.
【図７】本発明に係る支持治具の変形例の主要部の説明
図である。FIG. 7 is an explanatory view of a main part of a modification of the support jig according to the present invention.
【図８】本発明の方法の第２実施例の一工程を示す説明
図である。FIG. 8 is an explanatory view showing one step of a second embodiment of the method of the present invention.
【図９】実験に使用した円筒体の説明図である。FIG. 9 is an explanatory diagram of a cylindrical body used in an experiment.
【図１０】従来の技術を示す説明図である。FIG. 10 is an explanatory diagram showing a conventional technique.
【図１１】従来の電子写真方式の複写機の模式斜視図で
ある。FIG. 11 is a schematic perspective view of a conventional electrophotographic copying machine.
【図１２】従来の加工機のワークチャック装置で管材を
保持した状態の説明図である。FIG. 12 is an explanatory view of a state in which a pipe material is held by a work chuck device of a conventional processing machine.
【図１３】電子写真方式の複写機の感光ドラムおよび現
像スリーブの組付け部分を示す模式部分断面図である。FIG. 13 is a schematic partial cross-sectional view showing an assembly portion of a photosensitive drum and a developing sleeve of an electrophotographic copying machine.
１ 感光ドラム用のドラム基体 ２，１２ 端面 ３，１３ 端部内周面 １１ 現像スリーブ用のドラム基体 １１ａ ドラム本体 ２０ ベッド ２１ａ，２１ｂ スライダ ２２ａ，２２ｂ 主軸台 ２３ａ，２３ｂ 主軸 ２４ａ，２４ｂ 門型コラム ２５ａ，２５ｂ ガイド ２６ａ，２６ｂ 流体圧シリンダ ３０ ワーク ３１ａ，３１ｂ 上側ベース ３２ａ，３２ｂ 下側ベース ３３ａ 円筒ピン ３４ａ 下駒 ３５ａ 上駒 ４３ａ，４４ａ 傾斜面 ７０ 中子 ７３ａ 鼓形ピン REFERENCE SIGNS LIST 1 drum base for photosensitive drum 2, 12 end surface 3, 13 end inner peripheral surface 11 drum base for developing sleeve 11 a drum body 20 bed 21 a, 21 b slider 22 a, 22 b headstock 23 a, 23 b spindle 24 a, 24 b portal column 25 a , 25b Guide 26a, 26b Fluid pressure cylinder 30 Work 31a, 31b Upper base 32a, 32b Lower base 33a Cylindrical pin 34a Lower bridge 35a Upper bridge 43a, 44a Inclined surface 70 Core 73a Hourglass pin
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ // Ｂ２３Ｂ 31/10 Ｂ２３Ｂ 31/10 Ｂ (58)調査した分野(Int.Cl.6，ＤＢ名) B23B 1/00 B23B 5/16 B23Q 3/06 G03G 5/10 G03G 21/00 350 B23B 31/10 ────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 identification code FI // B23B 31/10 B23B 31/10 B (58) Investigated field (Int.Cl. 6 , DB name) B23B 1/00 B23B 5/16 B23Q 3/06 G03G 5/10 G03G 21/00 350 B23B 31/10
Claims (11)
材を嵌合するための嵌合部を形成した円筒体であって、
前記嵌合部は、前記円筒体の端部近傍の外周面を周方向
に互いに間隔をおいた少なくとも３箇所にて前記周方向
に線接触する当接部材で締め付けることによって前記円
筒体を弾性変形域内の変形を保つ状態で固定しておき、
切削工具を支持してその回転中心軸線のまわりに回転さ
せる主軸を備えるとともに、該回転中心軸線に沿って移
動する切削手段により前記端部の少なくとも内周面を切
削加工したものであることを特徴とする円筒体。1. A cylindrical body having a fitting portion for fitting a rotational force transmitting member to at least a circumferential surface of an end portion,
The fitting portion elastically deforms the cylindrical body by tightening an outer peripheral surface near an end portion of the cylindrical body with a contact member that is in linear contact with the circumferential direction at at least three places spaced apart from each other in the circumferential direction. Keep it in a state that keeps the deformation in the area,
It is provided with a main shaft that supports a cutting tool and rotates around a rotation center axis thereof, and at least an inner peripheral surface of the end portion is cut by cutting means that moves along the rotation center axis. And a cylindrical body.
請求項１記載の円筒体。2. The cylindrical body according to claim 1, wherein the constituent material is a metal.
合金であることを特徴とする請求項２記載の円筒体。3. The cylindrical body according to claim 2, wherein the metal is aluminum or an aluminum alloy.
請求項１記載の円筒体。4. The cylindrical body according to claim 1, wherein the constituent material is a resin.
体において、端部の内周面とともに端面を切削加工した
ことを特徴とする電子写真装置用のドラム基体。5. The drum body for an electrophotographic apparatus according to claim 1, wherein the end surface is cut along with the inner peripheral surface of the end portion.
まわりに回転させる主軸を備えるとともに該回転中心軸
線に沿って移動する切削手段によって円筒体の端部の少
なくとも内周面を切削加工する際に、円筒体の端部近傍
の外周面を周方向に互いに間隔をおいた少なくとも３箇
所にて前記周方向に線接触する当接部材を有する押圧部
材を用いて、前記当接部材の中心軸線が前記回転中心軸
線に一致するように前記押圧部材を位置決めしておき、
該押圧部材の前記当接部材で前記円筒体を締め付けるこ
とによって該円筒体を弾性変形域内の変形を保つ状態で
固定することを特徴とする円筒体の保持方法。6. A cutting tool provided with a main shaft for supporting a cutting tool and rotating about a rotation center axis thereof, and cutting at least an inner peripheral surface of an end portion of the cylindrical body by cutting means moving along the rotation center axis. At this time, using a pressing member having a contact member that makes line contact in the circumferential direction at at least three places on the outer peripheral surface near the end of the cylindrical body at intervals in the circumferential direction, the center of the contact member is used. Positioning the pressing member so that an axis coincides with the rotation center axis,
A method of holding a cylindrical body, wherein the cylindrical body is fixed by tightening the cylindrical body with the abutting member of the pressing member while maintaining deformation within an elastic deformation region.
体の外形寸法より弾性変形域内の変形の変形量の範囲の
寸法を差し引いた外径の円筒状ゲージ部材を用い、該円
筒状ゲージ部材をその外周面に前記押圧部材の当接部材
を当接させた状態とし、この状態の円筒状ゲージの軸心
が主軸の回転中心軸線と一致するように押圧部材の位置
を調節して行うことを特徴とする請求項６記載の円筒体
の保持方法。7. The positioning of the pressing member is performed by using a cylindrical gauge member having an outer diameter obtained by subtracting a dimension within a range of deformation within an elastic deformation range from an outer dimension of a cylindrical body to be held. In a state where the contact member of the pressing member is brought into contact with the outer peripheral surface thereof, and adjusting the position of the pressing member so that the axis of the cylindrical gauge in this state coincides with the rotation center axis of the main shaft. The method for holding a cylindrical body according to claim 6, wherein:
し、前記円筒体の端部近傍の外周面を周方向に互いに間
隔をおいた少なくとも３箇所にて前記周方向に線接触す
る当接部材で締め付けることによって前記円筒体を弾性
変形域内の変形を保つ状態で固定しておき、切削工具を
支持してその回転中心軸線のまわりに回転させる主軸を
備えるとともに該回転中心軸線に沿って移動する切削手
段により、前記円筒体の端部の内周面および端面を切削
加工することを特徴とする電子写真装置用のドラム基体
の製造方法。8. A tubular member having a predetermined length is produced by cutting a tube material, and the outer peripheral surface near the end of the cylindrical member is line-contacted in the circumferential direction at at least three places spaced apart from each other in the circumferential direction. The cylindrical body is fixed in a state where deformation in the elastic deformation region is maintained by tightening with a contact member, and a main shaft which supports the cutting tool and rotates around the rotation center axis thereof is provided and the rotation center axis is A method of manufacturing a drum base for an electrophotographic apparatus, wherein an inner peripheral surface and an end surface of an end portion of the cylindrical body are cut by a cutting means moving along.
し、前記円筒体内に中子を挿入した状態で、前記円筒体
の端部近傍の外周面を周方向に互いに間隔をおいて少な
くとも３箇所にて前記周方向に線接触する当接部材で締
め付けることにより前記円筒体を弾性変形域内の変形を
保つ状態で固定しておき、切削工具を支持してその回転
中心軸線のまわりに回転させる主軸を備えるとともに該
回転中心軸線に沿って移動する切削工具により、前記円
筒体の端部の内周面および端面を切削加工することを特
徴とする電子写真装置用のドラム基体の製造方法。9. A tubular body having a predetermined length is produced by cutting a tube material, and an outer peripheral surface near an end of the cylindrical body is spaced apart from each other in a circumferential direction in a state where a core is inserted into the cylindrical body. The cylindrical body is fixed in a state where deformation within the elastic deformation area is maintained by tightening with a contact member that makes a line contact in the circumferential direction at least at three places, and the cutting tool is supported around the rotation center axis thereof. Manufacturing a drum base for an electrophotographic apparatus, wherein the inner peripheral surface and the end surface of the end of the cylindrical body are cut by a cutting tool having a main shaft for rotating the cylindrical body and moving along the rotation center axis. Method.
のまわりに回転させる主軸を備えるとともに該回転中心
軸線に沿って移動自在な切削手段と、前記切削工具に対
して円筒体の端部を対向させて保持する保持治具とを備
えた円筒体の加工装置であって、 前記保持治具は、前記円筒体をまわりから締め付けるた
めの少なくとも２個の押圧部材と、該押圧部材の前記円
筒体側の面に設けられた前記円筒体の外周面を周方向に
互いに間隔をおいた少なくとも３箇所にて前記周方向に
線接触する当接部材と、前記当接部材の中心軸線を前記
主軸の回転中心軸線に一致するように前記押圧部材を位
置決めするための押圧部材位置決め手段と、前記押圧部
材の少なくとも１つを円筒体に押圧するための駆動手段
とを備えたことを特徴とする円筒体の加工装置。10. A cutting means having a main shaft for supporting a cutting tool and rotating about a rotation center axis thereof and movable along the rotation center axis, and an end of a cylindrical body with respect to the cutting tool. A processing apparatus for a cylindrical body, comprising: a holding jig configured to hold the cylinder body in opposition to each other, wherein the holding jig includes at least two pressing members for tightening the cylindrical body from around, and the cylinder of the pressing member. A contact member that makes a line contact with the outer peripheral surface of the cylindrical body provided on the body-side surface in the circumferential direction at at least three places spaced apart from each other in the circumferential direction, and a center axis of the contact member is defined by the main shaft. A cylindrical body, comprising: pressing member positioning means for positioning the pressing member so as to coincide with a rotation center axis; and driving means for pressing at least one of the pressing members against the cylindrical body. Addition Apparatus.
からなり、当接部材が他方の押圧部材の円筒体側の面に
形成されたＶ字状の切欠部の両傾斜面にそれぞれ１個ず
つ設けられているとともに一方の押圧部材の前記円筒側
の面に１個設けられたことを特徴とする請求項１０記載
の円筒体の加工装置。11. A pressing member comprising two pressing members arranged in a vertical direction, and a contact member is provided on each of two inclined surfaces of a V-shaped notch formed on a surface of the other pressing member on a cylindrical body side. 11. The cylindrical body processing apparatus according to claim 10, wherein one of the pressing members is provided on the surface of the pressing member on the side of the cylinder.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5210995A JP2905672B2 (en) | 1992-09-04 | 1993-08-03 | Cylindrical body and drum base for electrophotographic apparatus, method for holding the same, manufacturing method and processing apparatus |
| CN 93116843 CN1084651A (en) | 1992-09-04 | 1993-09-04 | The bulging body that right cylinder, electrophotograph apparatus are used, their method of clamping and job operation and device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-263176 | 1992-09-04 | ||
| JP26317692 | 1992-09-04 | ||
| JP5210995A JP2905672B2 (en) | 1992-09-04 | 1993-08-03 | Cylindrical body and drum base for electrophotographic apparatus, method for holding the same, manufacturing method and processing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06198502A JPH06198502A (en) | 1994-07-19 |
| JP2905672B2 true JP2905672B2 (en) | 1999-06-14 |
Family
ID=26518376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5210995A Expired - Lifetime JP2905672B2 (en) | 1992-09-04 | 1993-08-03 | Cylindrical body and drum base for electrophotographic apparatus, method for holding the same, manufacturing method and processing apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2905672B2 (en) |
| CN (1) | CN1084651A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108972819A (en) * | 2018-07-02 | 2018-12-11 | 安庆市美尔家木业有限公司 | A kind of shaping equipment for timber processing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6209429B1 (en) * | 1999-06-28 | 2001-04-03 | Xerox Corporation | Machining hollow cylinders |
| JP3745319B2 (en) * | 2002-08-06 | 2006-02-15 | キヤノン株式会社 | Shaft member processing method and apparatus |
| CN100415415C (en) * | 2002-08-09 | 2008-09-03 | 佳能株式会社 | Method for processing cylinder parts, apparatus for processing cylinder parts and cylinder parts |
| JP2005173558A (en) * | 2003-11-21 | 2005-06-30 | Seiko Epson Corp | Method for processing cylinder periphery, method for manufacturing development roller and photoconductor drum, and development roller and photoconductor drum |
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| JP2018077378A (en) * | 2016-11-10 | 2018-05-17 | コニカミノルタ株式会社 | Method for manufacturing electrophotographic photoreceptor |
| KR101857272B1 (en) * | 2017-04-26 | 2018-05-14 | 덕흥 주식회사 | Clamping structure of screw processing apparatus |
| CN107116371B (en) * | 2017-05-22 | 2023-02-07 | 佛山市高明区生产力促进中心 | Aluminum profile machining device |
| JP6986861B2 (en) * | 2017-05-31 | 2021-12-22 | 牧野フライス精機株式会社 | Work support member |
| CN108274268A (en) * | 2018-04-09 | 2018-07-13 | 郑州宇恒环保技术有限公司 | Adjustable type drill positioning device in cylindrical workpiece |
| CN110039615B (en) * | 2019-04-15 | 2021-08-31 | 安徽飞瑟工艺品有限公司 | Timber concatenation equipment |
| CN110306864B (en) * | 2019-06-19 | 2020-08-04 | 河南省工建集团有限责任公司 | Chimney titanium steel inner pipe hydraulic lifting device and method based on flip-chip method |
| JP7487139B2 (en) * | 2021-04-01 | 2024-05-20 | 株式会社神戸製鋼所 | Manufacturing method for turbomachinery |
-
1993
- 1993-08-03 JP JP5210995A patent/JP2905672B2/en not_active Expired - Lifetime
- 1993-09-04 CN CN 93116843 patent/CN1084651A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108972819A (en) * | 2018-07-02 | 2018-12-11 | 安庆市美尔家木业有限公司 | A kind of shaping equipment for timber processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1084651A (en) | 1994-03-30 |
| JPH06198502A (en) | 1994-07-19 |
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