JP2017032116A - Manufacturing method of brake disc - Google Patents

Manufacturing method of brake disc Download PDF

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Publication number
JP2017032116A
JP2017032116A JP2015155020A JP2015155020A JP2017032116A JP 2017032116 A JP2017032116 A JP 2017032116A JP 2015155020 A JP2015155020 A JP 2015155020A JP 2015155020 A JP2015155020 A JP 2015155020A JP 2017032116 A JP2017032116 A JP 2017032116A
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brake disc
rotor
rotary blade
manufacturing
shape
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JP6457902B2 (en
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靖浩 ▲高▼木
靖浩 ▲高▼木
Yasuhiro Takagi
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Yutaka Giken Co Ltd
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Yutaka Giken Co Ltd
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Priority to JP2015155020A priority Critical patent/JP6457902B2/en
Priority to PCT/JP2016/001164 priority patent/WO2017022147A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/86—Making other particular articles other parts for bicycles or motorcycles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00—Brakes; Arrangements thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums for disc brakes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Braking Arrangements (AREA)
  • Milling Processes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a brake disc which can remove burr and broken-out sections caused in die cutting processing of a plate efficiently, is superior in appearance, has a periphery shape of an unevenness repetition shape that unevenness of a diameter direction is repeated to a hoop direction.SOLUTION: A manufacturing method includes: a die cutting step punching a brake disc that the periphery shape is unevenness repetition shape from a plate by press; and a chamfering step forming a chamfering side to all laps of the brake disc to an edge part by turning the brake disc while cutting the edge part of a side surface 15b of the brake disc 1 located backward of the die cutting direction and a periphery side 17 by a rotary cutter 2 inclined an axis of rotation at an angle within 45-75 degrees for the side surface.SELECTED DRAWING: Figure 3

Description

本発明は、自動二輪車等のディスクブレーキ装置に用いられるブレーキディスクの製造方法に関し、より詳しくは、径方向の凹凸が周方向に繰り返される凹凸繰り返し形状の外周形状を持つブレーキディスクの製造方法に関する。   The present invention relates to a method for manufacturing a brake disc used in a disc brake device such as a motorcycle, and more particularly, to a method for manufacturing a brake disc having an outer circumferential shape of a concave and convex shape in which radial irregularities are repeated in the circumferential direction.

この種のブレーキディスクの製造方法は例えば特許文献１で知られている。このものは、プレスにより板材から外周形状が前記凹凸繰り返し形状のブレーキディスクを打ち抜く打ち抜き工程と、ブレーキディスクの外周面と側面との角部を面取り金型で押圧して塑性変形させ、面取り面を形成する面取り工程とを含む。   A method for manufacturing this type of brake disk is known, for example, from Patent Document 1. This is a punching process in which a brake disc whose outer peripheral shape is the above-mentioned concave and convex shape is punched from a plate material by a press, and a corner portion between the outer peripheral surface and the side surface of the brake disc is pressed with a chamfering mold to be plastically deformed. Forming a chamfering step.

ここで、ブレーキディスクは外観部品であるため、美観の向上が望まれる。上記従来例のものでは、打ち抜き工程でブレーキディスクの外周面と側面との角部に発生するバリを押し潰すように面取り金型を押し当てるため、潰れたバリが面取り面に重なって残ってしまう。しかも、板材の板厚方向一方からプレスにより打ち抜くと、ブレーキディスクの外周面における破断面の面積が大きくなるため、破断面部分を除去する仕上げ切削加工が別途必要となる。   Here, since the brake disc is an external part, an improvement in aesthetics is desired. In the above-mentioned conventional example, the chamfering mold is pressed so as to crush the burr generated at the corner between the outer peripheral surface and the side surface of the brake disc in the punching process, so that the crushing burr remains on the chamfered surface. . In addition, when punching is performed from one side in the plate thickness direction of the plate material, the area of the fracture surface on the outer peripheral surface of the brake disk increases, so that a finish cutting process for removing the fracture surface portion is separately required.

特開２００８−２３２４４１号公報JP 2008-232441 A

本発明は、以上の点に鑑み、板材の打ち抜き加工で生じるバリや破断面部分を効率よく除去できて美観に優れたブレーキディスクの製造方法を提供することをその課題としている。   In view of the above, an object of the present invention is to provide a brake disk manufacturing method that can efficiently remove burrs and fractured surface portions generated by punching a plate material and has an excellent appearance.

上記課題を解決するために、径方向の凹凸が周方向に繰り返される凹凸繰り返し形状の外周形状を持つ本発明のブレーキディスクの製造方法は、プレスにより板材から外周形状が凹凸繰り返し形状のブレーキディスクを打ち抜く打ち抜き工程と、打ち抜き方向後方に位置するブレーキディスクの側面と外周面との角部を、この側面に対して４５度から７５度の範囲内の角度で回転軸を傾斜させた回転刃具により切削しつつブレーキディスクを回転させ、当該角部にブレーキディスクの全周に亘って面取り面を形成する面取り工程と、を含むことを特徴とする。   In order to solve the above-mentioned problem, the manufacturing method of the brake disk of the present invention having the outer periphery shape of the uneven shape in which the radial unevenness is repeated in the circumferential direction, A punching process for punching, and a corner between the side surface and the outer peripheral surface of the brake disk located rearward in the punching direction are cut with a rotary blade whose rotation axis is inclined at an angle within a range of 45 to 75 degrees with respect to the side surface. And a chamfering step of rotating the brake disc to form a chamfered surface around the entire circumference of the brake disc at the corner portion.

本発明によれば、ブレーキディスクの側面と外周面との角部に対する一度の切削加工で打ち抜き加工で生じたバリや破断面部分を効率よく除去することができる。そして、ブレーキディスクの側面と外周面との角部に面取り面が形成されるため、美観に優れるブレーキディスクとなる。この場合、回転刃具として専用のものが必要となるわけでなく（つまり、一般に使用されている回転刃具を利用でき）、しかも、破断面部分を除去する仕上げ切削加工が不要になるため、ブレーキディスクの製造コストを削減することが可能になる。なお、ブレーキディスクの側面と回転軸とのなす角度が４５度より小さくなると、ブレーキパッドの摺接面としての役割を持つブレーキディスクの側面が必要以上に削られることになり、７５度より大きくなると、破断面部分を除去するには有効であるものの、ブレーキディスクの外周面の切削量が増加すると共に、回転刃具の押し付け力を大きくする必要があり、回転刃具を備える切削装置の大型複雑化を招来する。   According to the present invention, it is possible to efficiently remove burrs and fractured surface portions generated by punching by one-time cutting on the corners of the side surface and the outer peripheral surface of the brake disk. And since a chamfering surface is formed in the corner | angular part of the side surface and outer peripheral surface of a brake disc, it becomes a brake disc excellent in aesthetics. In this case, a dedicated rotary blade is not required (that is, a commonly used rotary blade can be used), and a finish cutting process for removing the fractured surface portion is not required. The manufacturing cost can be reduced. If the angle formed between the side surface of the brake disk and the rotating shaft is smaller than 45 degrees, the side surface of the brake disk, which serves as the sliding contact surface of the brake pad, will be scraped more than necessary, and if it exceeds 75 degrees. Although effective for removing the fracture surface, the amount of cutting of the outer peripheral surface of the brake disk must be increased and the pressing force of the rotary blade needs to be increased. Invite you.

また、本発明においては、前記回転刃具の回転軸を前記ブレーキディスクから径方向及び軸方向に離間した旋回中心を支点にして前記角部に対する回転刃具の接離方向に旋回自在とすると共に、回転軸を角部に対する回転刃具の当接方向に旋回するように付勢した状態で前記面取り工程を行うことが好ましい。これによれば、ブレーキディスクを回転させたときにこのブレーキディスクの凹凸繰り返し形状の外周形状に倣って回転刃具が旋回することで、上記範囲内の角度でブレーキディスクの角部に回転刃具が常時当接し、一定な面取り量の面取り面を形成することができ、その上、回転刃具を備える切削装置の構成を簡素化でき、有利である。   Further, in the present invention, the rotation axis of the rotary blade is rotatable in the contact / separation direction of the rotary blade with respect to the corner portion with a turning center separated from the brake disk in the radial direction and the axial direction as a fulcrum. The chamfering step is preferably performed in a state where the shaft is biased so as to turn in the contact direction of the rotary blade with respect to the corner portion. According to this, when the brake disk is rotated, the rotary blade rotates at the corners of the brake disk at an angle within the above range by rotating the rotary blade following the outer circumferential shape of the concave and convex shape of the brake disk. A chamfering surface having a constant chamfering amount can be formed in contact with each other, and in addition, the configuration of a cutting device including a rotary blade can be simplified, which is advantageous.

本発明の実施形態のブレーキディスクの製造方法を実施して製造されるロータの正面図。The front view of the rotor manufactured by implementing the manufacturing method of the brake disc of embodiment of this invention. （ａ）及び（ｂ）は、各工程におけるロータの一部を拡大して示す断面図。(A) And (b) is sectional drawing which expands and shows a part of rotor in each process. 面取り工程を行う切削装置の構成を模式的に示す図。The figure which shows typically the structure of the cutting device which performs a chamfering process. 面取り工程でのロータの外周切削を説明する示す図。The figure which shows the outer periphery cutting of the rotor in a chamfering process.

以下、図面を参照して、フローティング型ブレーキディスクのロータの製造に本発明を適用した実施形態について説明する。特に図示して説明しないが、フローティング型ブレーキディスクは、ロータ１とこのロータ１の内側に配置されて自動二輪車等の車両の車軸に固定されるハブとを備える。   Hereinafter, an embodiment in which the present invention is applied to manufacture of a rotor of a floating brake disc will be described with reference to the drawings. Although not shown and described in particular, the floating brake disc includes a rotor 1 and a hub that is disposed inside the rotor 1 and is fixed to an axle of a vehicle such as a motorcycle.

ロータ１の内周には、図１に示すように、径方向内方に突出する４つの突出片１１が周方向に９０度間隔で形成されている。そして、突出片１１に形成された固定孔１２を介して図示省略の連結ピンによりロータ１とハブとがフローティング状態に連結される。ロータ１は、径方向の凹部１３と凸部１４とが周方向に繰り返される凹凸繰り返し形状の外周形状を持つ。凹部１３及び凸部１４の数や形状は適宜選択することができる。また、ブレーキパッド（図示せず）が摺接するロータ１の側面１５ａ，１５ｂには、板厚方向に貫通する複数の円形の抜き孔１６が形成されている。以下に、図２〜図４を参照して、ロータ１の製造方法について具体的に説明する。   As shown in FIG. 1, four projecting pieces 11 projecting radially inward are formed on the inner circumference of the rotor 1 at intervals of 90 degrees in the circumferential direction. Then, the rotor 1 and the hub are connected in a floating state by a connection pin (not shown) through a fixing hole 12 formed in the protruding piece 11. The rotor 1 has a concavo-convex outer peripheral shape in which a radial concave portion 13 and a convex portion 14 are repeated in the circumferential direction. The number and shape of the concave portions 13 and the convex portions 14 can be appropriately selected. A plurality of circular holes 16 penetrating in the plate thickness direction are formed in the side surfaces 15a and 15b of the rotor 1 in sliding contact with a brake pad (not shown). Below, with reference to FIGS. 2-4, the manufacturing method of the rotor 1 is demonstrated concretely.

先ず、外周形状が前記凹凸繰り返し形状のロータ１を板材の板厚方向一方からプレスで打ち抜く打ち抜き工程を行う。この打ち抜き工程にて、固定孔１２のプレスによる孔空けも行われる。プレス機としては公知のものが利用できるため、詳細な説明は省略する。ここで、打ち抜き工程を経たロータ１の外周面１７は、図２（ａ）に示すように、打ち抜き方向前方に位置する側面１５ａの外周縁部のプレスだれ１７ａから連続するせん断面１７ｂ、破断面１７ｃと続き、打ち抜き方向後方に位置する側面１５ｂと外周面１７との角部にバリ１７ｄが発生した状態になっている。その後、ロータ１に抜き孔１６をピアス加工し、更に、ロータ１の内周を加工する。   First, a punching process is performed in which the rotor 1 whose outer peripheral shape is the concavo-convex shape is punched from one side in the plate thickness direction of the plate with a press. In this punching process, the fixing holes 12 are also punched by pressing. Since a known press can be used, a detailed description is omitted. Here, the outer peripheral surface 17 of the rotor 1 that has undergone the punching process is, as shown in FIG. 2 (a), a shear surface 17b that continues from the press pad 17a at the outer peripheral edge of the side surface 15a that is positioned forward in the punching direction, Continuing from 17c, burrs 17d are generated at the corners of the side surface 15b and the outer peripheral surface 17 located rearward in the punching direction. Thereafter, the hole 16 is pierced in the rotor 1, and the inner periphery of the rotor 1 is further processed.

次に、図３に示す回転刃具２を有する切削装置Ｃｍを用い、ロータ１の側面１５ｂと外周面１７との角部に、図２（ｂ）に示すように、ロータ１の全周に亘って面取り面１８を形成する面取り工程を行う。回転刃具２としては、回転軸２１の先端外周面に複数の刃２２を設けた上記板材の切削に一般に使用されるものが用いられる。この場合、回転刃具２の半径は、ロータ１の凹部１３の半径より小さくなるように設定される。切削装置Ｃｍとしては、ロータ１を保持するワークステージ３と、回転刃具２を保持する刃具ステージ４とを有するものが用いられる。   Next, using the cutting device Cm having the rotary blade 2 shown in FIG. 3, at the corners of the side surface 15 b and the outer peripheral surface 17 of the rotor 1, as shown in FIG. Then, a chamfering process for forming the chamfered surface 18 is performed. As the rotary blade 2, one that is generally used for cutting the plate material in which a plurality of blades 22 are provided on the outer peripheral surface of the distal end of the rotary shaft 21 is used. In this case, the radius of the rotary blade 2 is set to be smaller than the radius of the recess 13 of the rotor 1. As the cutting device Cm, one having a work stage 3 that holds the rotor 1 and a blade stage 4 that holds the rotary blade 2 is used.

ワークステージ３は、図示省略のモータを内蔵した載置台３１と、載置台３１の上面に設けられるチャック体３２とを備え、チャック体３２の上部にロータ１を係止するチャック爪３２ａが設けられている。そして、チャック爪３２ａによりロータ１を係止した状態でモータによりチャック体３２を回転駆動すると、ロータ１がモータの回転軸を回転中心として所定回転数で回転される。   The work stage 3 includes a mounting table 31 that includes a motor (not shown) and a chuck body 32 provided on the upper surface of the mounting table 31, and a chuck claw 32 a that locks the rotor 1 is provided on the chuck body 32. ing. When the chuck body 32 is rotationally driven by the motor while the rotor 1 is locked by the chuck claws 32a, the rotor 1 is rotated at a predetermined number of rotations about the rotation axis of the motor.

刃具ステージ４は、ロータ１の径方向に沿ってワークステージ３に対して進退する図示省略のアクチュエータを有する支持台４１と、支持台４１に立設した支柱４２と、径方向に沿ってのびるように支柱４２に設けた支持アーム４３とを有する。支持アーム４３は、図示省略のモータ付きの送りねじ機構を介して支柱４２に設けられ、支柱４２に沿って往復動（図３中、上下動）するようになっている。   The cutting tool stage 4 extends along the radial direction with a support base 41 having an actuator (not shown) that advances and retreats with respect to the work stage 3 along the radial direction of the rotor 1, a support column 42 erected on the support base 41. And a support arm 43 provided on the column 42. The support arm 43 is provided on the support 42 via a feed screw mechanism with a motor (not shown), and reciprocates along the support 42 (up and down in FIG. 3).

支持アーム４３のロータ１側の先端部には、回転刃具２をロータ１に押し付ける図示省略の軸を内蔵した取付ブロック４４が設けられ、取付ブロック４４には、回転刃具２の回転軸２１を回転自在に保持し、モータを内蔵した刃具ホルダ４５の下端が取り付けられ、モータにより刃具ホルダ４５、ひいては回転刃具２が回転軸２１の軸線２１ａ回りに回転駆動されるようになっている。この場合、刃具ホルダ４５は、取付ブロック４４に対する取付箇所を旋回中心４５ｐとし、この旋回中心４５ｐを支点にしてロータ１の側面１５ｂと外周面１７との角部の接離方向に旋回自在に構成されると共に、油圧式や空気式のアクチュ―エータやスプリングなどで構成される付勢手段４６により、回転刃具２が角部に当接する当接方向に刃具ホルダ４５が旋回するように付勢されている。   At the tip of the support arm 43 on the rotor 1 side, there is provided a mounting block 44 having a shaft (not shown) that presses the rotary blade 2 against the rotor 1, and the mounting block 44 rotates the rotary shaft 21 of the rotary blade 2. The lower end of a blade holder 45 that is freely held and has a built-in motor is attached, and the blade holder 45 and thus the rotary blade 2 are driven to rotate about the axis 21 a of the rotary shaft 21 by the motor. In this case, the blade holder 45 is configured to be turnable in the contact / separation direction of the corner portion between the side surface 15b of the rotor 1 and the outer peripheral surface 17 with the turning center 45p as a turning center 45p as a mounting point with respect to the mounting block 44. At the same time, an urging means 46 constituted by a hydraulic or pneumatic actuator, a spring or the like urges the blade holder 45 to turn in a contact direction in which the rotary blade 2 contacts the corner. ing.

面取り工程を行う場合、チャック爪３２ａでロータ１が係止されるようにワークステージ３に打ち抜き工程を経たロータ１をセットした後、支持台４１を径方向に沿って移動させると共に支持アーム４３を支柱４２に沿って上動または下動させ、ロータ１の側面１５ｂと外周面１７との角部に回転刃具２の刃２２を当接させる。このとき、図４に示すように、旋回中心４５ｐをロータ１から径方向及び軸方向に離間させ、回転刃具２の回転軸２１の軸線２１ａを側面１５ｂに対して４５度から７５度の範囲内の角度で傾斜させる。ここで、付勢手段４６を介した回転刃具２の角部への押し付け力は、ロータ１の外周面を切削すべき切削量等に応じて適宜選択される。また、ロータ１の側面１５ｂと回転軸２１の軸線２１ａとのなす角度が４５度より小さくなると、ブレーキパッドの摺接面としての役割を持つロータ１の側面１５ｂが必要以上に削られることになり、しかも、後述のように、ロータ１の側面１５ａ，１５ｂを平面切削したとき、面取り面１８を残すことができない場合があり、７５度より大きくなると、破断面１７ｃ部分を除去するには有効であるものの、ロータ１の外周面の切削量が増加すると共に、回転刃具２の押し付け力を大きくする必要があり、切削装置Ｃｍの大型複雑化を招来する。   When performing the chamfering process, after setting the rotor 1 after the punching process on the work stage 3 so that the rotor 1 is locked by the chuck claws 32a, the support base 41 is moved along the radial direction and the support arm 43 is moved. The blade 22 of the rotary blade 2 is brought into contact with the corners of the side surface 15b and the outer peripheral surface 17 of the rotor 1 along the support 42. At this time, as shown in FIG. 4, the turning center 45p is separated from the rotor 1 in the radial direction and the axial direction, and the axis 21a of the rotary shaft 21 of the rotary blade 2 is within a range of 45 to 75 degrees with respect to the side surface 15b. Tilt at an angle of. Here, the pressing force against the corner of the rotary blade 2 via the urging means 46 is appropriately selected according to the amount of cutting to be performed on the outer peripheral surface of the rotor 1. Further, when the angle formed between the side surface 15b of the rotor 1 and the axis 21a of the rotating shaft 21 is smaller than 45 degrees, the side surface 15b of the rotor 1 serving as a sliding contact surface of the brake pad is scraped more than necessary. In addition, as will be described later, when the side surfaces 15a and 15b of the rotor 1 are subjected to plane cutting, the chamfered surface 18 may not be left, and when it exceeds 75 degrees, it is effective for removing the fractured surface 17c portion. Although there is an increase in the amount of cutting of the outer peripheral surface of the rotor 1, it is necessary to increase the pressing force of the rotary blade 2, leading to a large-sized complexity of the cutting device Cm.

ロータ１の側面１５ｂと外周面１７との角部に回転刃具２の刃２２を当接させた後、回転刃具２を回転させながら、チャック体３２を回転駆動してロータ１を回転させる。これにより、ロータ１の角部に対する一度の切削加工で、打ち抜き加工で生じた破断面１７ｃ部分やばり１７ｄが除去されてロータ１の外周面１７に面取り面１８が形成される（図２（ｂ）参照）。このときの回転刃具２の回転方向はロータ１の回転方向と同一であってもまたは逆方向であってもよく、ロータ１の外周面１７を切削すべき切削量等に応じて適宜選択される。   After the blade 22 of the rotary blade 2 is brought into contact with the corners of the side surface 15 b and the outer peripheral surface 17 of the rotor 1, the rotor 1 is rotated by rotating the chuck body 32 while rotating the rotary blade 2. Thereby, the fracture surface 17c part and the burr 17d generated by the punching process are removed by a single cutting process on the corner portion of the rotor 1, and a chamfered surface 18 is formed on the outer peripheral surface 17 of the rotor 1 (FIG. 2B). )reference). The rotation direction of the rotary blade 2 at this time may be the same as or opposite to the rotation direction of the rotor 1 and is appropriately selected according to the cutting amount to be cut on the outer peripheral surface 17 of the rotor 1. .

面取り工程を行った後は、ロータ１が焼き入れされ、上記打ち抜き工程で生じた歪やうねり等の変形が除去される。そして、ロータ１の表面に塗装が施される。最後に、ロータ１の平面度を更に良くするために、公知の切削機を用いてロータの側面１５ａ，１５ｂが数百μｍ程度の厚さで平面切削される。   After performing the chamfering process, the rotor 1 is quenched, and deformations such as distortion and waviness generated in the punching process are removed. Then, the surface of the rotor 1 is painted. Finally, in order to further improve the flatness of the rotor 1, the side surfaces 15a and 15b of the rotor are plane-cut with a thickness of about several hundred μm using a known cutting machine.

以上の実施形態によれば、回転刃具２を用いたロータ１の側面１５ｂと外周面１７との角部に対する一度の切削加工で打ち抜き加工で生じたバリ１７ｄや破断面１７ｃ部分が効率よく除去されて当該角部に面取り面１８が形成される。その結果、ロータ１を美観に優れるものにできる。この場合、回転刃具２として一般に使用されているものが利用でき、しかも、破断面１７ｃ部分を除去する仕上げ切削加工が不要になり、その上、角部に対する回転刃具２の押し付け力を然程大きくする必要がないため、切削装置を簡素化でき、ロータ１の製造コストを大幅に削減することが可能になる。   According to the embodiment described above, the burr 17d and the fractured surface 17c portion generated by the punching process by one-time cutting on the corner portion of the side surface 15b and the outer peripheral surface 17 of the rotor 1 using the rotary blade 2 are efficiently removed. Thus, a chamfered surface 18 is formed at the corner. As a result, the rotor 1 can be excellent in aesthetics. In this case, what is generally used as the rotary blade 2 can be used, and the finishing cutting process for removing the fractured surface 17c portion is not required, and the pressing force of the rotary blade 2 against the corner portion is increased so much. Therefore, the cutting device can be simplified and the manufacturing cost of the rotor 1 can be greatly reduced.

また、回転刃具２の回転軸２２をロータ１から径方向及び軸方向に離間した旋回中心４５ｐを支点にして角部に対する回転刃具２の接離方向に旋回自在とすると共に、回転軸２２を角部に対する回転刃具２の当接方向に旋回するように付勢しているため、面取り工程の際、ロータ１のの凹凸繰り返し形状の外周形状に倣って、上記範囲内の角度で回転刃具２が旋回することで、簡単な構成でロータ１の角部に回転刃具２が常時当接させることができ、精度よく面取り面１８を形成することができる。   Further, the rotary shaft 22 of the rotary blade 2 can be turned in the contact / separation direction of the rotary blade 2 with respect to the corner portion with a turning center 45p spaced apart from the rotor 1 in the radial direction and the axial direction as a fulcrum. The rotary blade 2 is biased so as to pivot in the contact direction of the rotary blade 2 with respect to the portion, so that the rotary blade 2 is rotated at an angle within the above range following the outer circumferential shape of the concave and convex shape of the rotor 1 during the chamfering process. By turning, the rotary blade 2 can always be brought into contact with the corner portion of the rotor 1 with a simple configuration, and the chamfered surface 18 can be formed with high accuracy.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、上記実施形態では、フローティング型ブレーキディスクのロータ１を製造する場合を例として説明したが、ブレーキパッドが摺接する部分と車軸を挿通する部分とが一体に成形された１枚板構造のブレーキディスクの製造にも本発明を適用できる。   As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, the case where the rotor 1 of the floating brake disk is manufactured has been described as an example. However, the brake having a single plate structure in which the portion where the brake pad is slidably contacted and the portion where the axle is inserted is integrally formed. The present invention can also be applied to the manufacture of discs.

また、上記実施形態では、回転軸２２を角部に対する回転刃具２の当接方向に旋回するように付勢し、面取り工程の際、ロータ１の凹凸繰り返し形状の外周形状に倣って所定の角度範囲で回転刃具２が旋回するようにしたものを例に説明したが、これに限定されるものではない。例えば、取付ブロック４４に刃具ホルダ４５を固定しておき、ロータ１の凹凸繰り返し形状の外周形状に倣って支持台４１をワークステージ３に対して進退させるようにして面取り工程を行うことがもできる。   Moreover, in the said embodiment, the rotating shaft 22 is urged | biased so that it may turn in the contact direction of the rotary blade 2 with respect to a corner | angular part, and a predetermined angle is followed according to the outer periphery shape of the uneven | corrugated repeated shape of the rotor 1 in the chamfering process. Although the example in which the rotary blade 2 is swung in the range has been described as an example, it is not limited thereto. For example, the chamfering step can be performed by fixing the blade holder 45 to the mounting block 44 and moving the support base 41 forward and backward with respect to the work stage 3 following the outer peripheral shape of the concave and convex shape of the rotor 1. .

１…ロータ（ブレーキディスク）、１３…凸部、１４…凹部、１７…外周面、１８…面取り面、Ｃｍ…切削装置、２…回転刃具。
DESCRIPTION OF SYMBOLS 1 ... Rotor (brake disc), 13 ... Convex part, 14 ... Concave part, 17 ... Outer peripheral surface, 18 ... Chamfering surface, Cm ... Cutting device, 2 ... Rotary blade.

Claims (2)

径方向の凹凸が周方向に繰り返される凹凸繰り返し形状の外周形状を持つブレーキディスクの製造方法であって、
プレスにより板材から外周形状が凹凸繰り返し形状のブレーキディスクを打ち抜く打ち抜き工程と、
打ち抜き方向後方に位置するブレーキディスクの側面と外周面との角部を、この側面に対して４５度から７５度の範囲内の角度で回転軸を傾斜させた回転刃具により切削しつつブレーキディスクを回転させ、当該角部にブレーキディスクの全周に亘って面取り面を形成する面取り工程と、を含むことを特徴とするブレーキディスクの製造方法。 A method for manufacturing a brake disc having a concave and convex outer circumferential shape in which radial irregularities are repeated in the circumferential direction,
A punching process for punching a brake disc having a concave and convex outer periphery shape from a plate material by pressing;
The brake disc is cut while the corner between the side surface and the outer peripheral surface of the brake disc positioned rearward in the punching direction is cut with a rotary blade whose rotation axis is inclined at an angle within a range of 45 to 75 degrees with respect to the side surface. And a chamfering step of forming a chamfered surface over the entire circumference of the brake disk at the corner portion. 前記回転刃具の回転軸を前記ブレーキディスクから径方向及び軸方向に離間した旋回中心を支点にして前記角部に対する回転刃具の接離方向に旋回自在とすると共に、回転軸を角部に対する回転刃具の当接方向に旋回するように付勢した状態で前記面取り工程を行うことを特徴とする請求項１記載のブレーキディスクの製造方法。
The rotating blade of the rotary blade is rotatable in the contact / separation direction of the rotary blade with respect to the corner portion with a turning center separated from the brake disc in the radial direction and the axial direction as a fulcrum, and the rotary shaft is rotated with respect to the corner portion. 2. The method of manufacturing a brake disk according to claim 1, wherein the chamfering step is performed in a state of being biased so as to turn in a contact direction.
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JP2000084812A (en) * 1998-09-08 2000-03-28 Ooga:Kk Deburring device
JP2008298094A (en) * 2007-05-29 2008-12-11 Sunstar Engineering Inc Method of manufacturing brake disc and brake disc
JP2009028824A (en) * 2007-07-25 2009-02-12 Kabutoyama Works Co Ltd Automatic chamfering apparatus
JP2014104490A (en) * 2012-11-28 2014-06-09 Yutaka Giken Co Ltd Manufacturing method of brake disc

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000084812A (en) * 1998-09-08 2000-03-28 Ooga:Kk Deburring device
JP2008298094A (en) * 2007-05-29 2008-12-11 Sunstar Engineering Inc Method of manufacturing brake disc and brake disc
JP2009028824A (en) * 2007-07-25 2009-02-12 Kabutoyama Works Co Ltd Automatic chamfering apparatus
JP2014104490A (en) * 2012-11-28 2014-06-09 Yutaka Giken Co Ltd Manufacturing method of brake disc

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