JP3351360B2 - Method of manufacturing pulley - Google Patents
Method of manufacturing pulleyInfo
- Publication number
- JP3351360B2 JP3351360B2 JP30764998A JP30764998A JP3351360B2 JP 3351360 B2 JP3351360 B2 JP 3351360B2 JP 30764998 A JP30764998 A JP 30764998A JP 30764998 A JP30764998 A JP 30764998A JP 3351360 B2 JP3351360 B2 JP 3351360B2
- Authority
- JP
- Japan
- Prior art keywords
- bottom plate
- cylindrical
- cylindrical portion
- die
- pulley
- 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 - Fee Related
Links
Landscapes
- Forging (AREA)
- Pulleys (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属板の絞り加工
成形品よりなる有底円筒体の円筒部をベルト掛部とし、
底板部を支持部とするプーリー基材を用いて、円筒部と
支持部のコーナーにベルト外れ防止鍔を形成するプーリ
ーの製造方法に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a bottomed cylindrical body made of a drawn metal plate and formed as a belt hook,
The present invention relates to a method for manufacturing a pulley in which a belt detachment preventing flange is formed at a corner of a cylindrical portion and a support portion using a pulley base material having a bottom plate portion as a support portion.
【０００２】[0002]
【従来の技術】プーリーを製造する方法の１つに、転造
により製造する方法がある。この方法は、金属板を絞り
加工して形成した有底円筒体を、その円筒部をベルト掛
部とし、底板部を支持部とするプーリー基材として用
い、円筒部の外周面にローラーダイスを押し当ててベル
ト掛面を形成するとともにその両端にはベルト外れ防止
鍔を形成するものである。2. Description of the Related Art One method of manufacturing a pulley is a method of manufacturing by rolling. In this method, a bottomed cylindrical body formed by drawing a metal plate is used as a pulley base material having the cylindrical portion as a belt hook portion and the bottom plate portion as a support portion, and a roller die is formed on the outer peripheral surface of the cylindrical portion. The belt is pressed to form a belt-hanging surface, and a belt-separation preventing flange is formed at both ends thereof.
【０００３】この円筒部の両端に形成されるベルト外れ
防止鍔のうち、特に底板部側にベルト外れ防止鍔を形成
する方法として、次のような方法が知られている。The following method is known as a method for forming the belt detachment preventing flange formed on both ends of the cylindrical portion, particularly on the bottom plate side.
【０００４】金属板を絞り加工して形成した有底円筒体
を、その円筒部４４をベルト掛部とし、底板部４５を支
持部とするプーリー基材４６として用い、前記プーリー
基材４６の円筒部４４を径小方向に絞って円筒部４４と
底板部４５のコーナーを径小方向に折曲することによ
り、前記コーナーに環状の突出部を形成し、この突出部
をもってベルト外れ防止鍔４８を形成する（図１１）。A cylindrical body having a bottom formed by drawing a metal plate is used as a pulley substrate 46 having a cylindrical portion 44 as a belt hook portion and a bottom plate portion 45 as a supporting portion. By narrowing the portion 44 in the diameter direction,
By bending the corner of the bottom plate portion 45 in the small diameter direction, an annular protrusion is formed at the corner, and the protrusion forms the belt detachment prevention flange 48 (FIG. 11).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記方
法により製造されたプーリーは、前記ベルト外れ防止鍔
４８が円筒部４４と底板部４５とのコーナーを折曲する
ことにより形成されているため、その折曲部に錆が発生
する場合があるといった問題点があった。また、前記ベ
ルト外れ防止鍔４８は円筒部４４と底板部４５との重な
りにより形成されているためその部分の幅Ｌ３が略２枚
の板厚分となり、その分プーリー幅Ｌ４も広くなること
が避けられず、このため自動車用など特に狭い場所に取
り付けるものとしては不利となるといった問題点があっ
た。However, in the pulley manufactured by the above-mentioned method, the belt slippage preventing flange 48 is formed by bending a corner between the cylindrical portion 44 and the bottom plate portion 45. There is a problem that rust may be generated at the bent portion. Further, since the belt slippage prevention flange 48 is formed by the overlap of the cylindrical portion 44 and the bottom plate portion 45, the width L3 of that portion becomes approximately two plate thicknesses, and the pulley width L4 may be increased accordingly. Inevitably, there is a problem that it is disadvantageous as a device to be mounted in a particularly narrow place such as a vehicle.
【０００６】本発明の目的は、ベルト外れ防止鍔の幅を
狭くしプーリーの幅方向への小型化を図るとともに、錆
の発生のおそれを解消できるプーリーの製造方法を提供
することにある。An object of the present invention is to provide a method of manufacturing a pulley capable of reducing the width of a pulley preventing belt by reducing the width of a belt coming-off prevention flange and reducing the possibility of rusting while reducing the width of the pulley.
【０００７】[0007]
【課題を解決するための手段】本発明では、金属板を有
底円筒体に形成して円筒部をベルト掛部とし底板部を支
持部とするプーリー基材とする。According to the present invention, a metal plate is formed in a cylindrical body having a bottom, and a pulley substrate having a cylindrical portion as a belt hook portion and a bottom plate portion as a support portion.
【０００８】請求項１記載のプーリーの製造方法では、
前記円筒部の内径に対応する外径をもち且つ円筒部より
短くそして先端を前記底板部の内面に当接する底板部当
接面とする円柱状嵌合部と、該円柱状嵌合部の後端に前
記円筒部の開口端に当接する大径段部からなる開口端当
接部を有する内型により、前記プーリー基材の円筒部の
内周面とその開口端を支持し、また、前記円筒部外径に
対応する内径に形成され内周面で円筒部の外周面を支持
する嵌合孔を有する外型で前記プーリー基材の円筒部の
外周面を支持したうえで、前記外型の嵌合孔に摺動自在
に嵌合され、その先端を前記底板部の外面に当接して押
圧する底板部押圧面とし、該底板部押圧面の周囲を面取
りして底板部押圧面と前記外型の嵌合孔の内周面との間
に環状の凹溝を形成するようにした上押圧型により、前
記内型と外型で支持されたプーリー基材の底板部を押圧
し、上押圧型の底板部押圧面と内型の底板部当接面とに
より底板部を挟圧して、プーリー基材の円筒部の肉を前
記環状の凹溝に押し出すことにより、プーリー基材の円
筒部と底板部とのコーナーに環状の突出部を形成し、前
記突出部を形成したプーリー基材を、円筒部の内径より
小径で先端に底板部の内面に当接する第１の当接面を形
成した円柱状嵌合部をもつ第１のクランパーと、先端に
底板部の外面に当接する第２の当接面と、第２の当接面
の外周囲に、前記突出部に当接する第２のテーパー面を
形成した第２のクランパーとでクランプし、この状態
で、外周部がベルト幅に応じた凸面部をもつローラーダ
イスを円筒部の外周面に押し付け、ローラーダイスと第
１、第２のクランパーを回転させながら、ローラーダイ
スを円筒部の軸心方向に移動させ、円筒部を押圧しその
直径を縮小させることにより、円筒部と底板部とのコー
ナーに、前記突出部を利用してベルト外れ防止鍔を形成
することを特徴とする。In the method for manufacturing a pulley according to the first aspect,
A cylindrical fitting portion having an outer diameter corresponding to the inner diameter of the cylindrical portion, being shorter than the cylindrical portion, and having a bottom plate abutting surface that abuts against the inner surface of the bottom plate portion; At the end, an inner die having an open end abutting portion consisting of a large-diameter stepped portion abutting the open end of the cylindrical portion supports the inner peripheral surface of the cylindrical portion of the pulley base material and the open end thereof, After supporting the outer peripheral surface of the cylindrical portion of the pulley base material with an outer die having a fitting hole formed at an inner diameter corresponding to the outer diameter of the cylindrical portion and supporting the outer peripheral surface of the cylindrical portion at the inner peripheral surface, the outer die Slidably fitted into the fitting hole of the bottom plate portion as a bottom plate pressing surface that abuts against and presses the outer surface of the bottom plate portion, and the bottom plate pressing surface is chamfered around the bottom plate pressing surface. The upper and lower molds support the inner mold and the outer mold by forming an annular groove between the inner mold and the inner peripheral surface of the outer mold. Pressed the bottom plate portion of the pulley base material, and pressed the bottom plate portion by the bottom plate portion pressing surface of the upper pressing type and the bottom plate portion abutting surface of the inner mold, the thickness of the cylindrical portion of the pulley base material into the annular shape by extruding the groove to form a protruding portion of the annular corner of the cylindrical portion and the bottom plate portion of the pulley base, before
Pull the pulley substrate with the protrusion
The first contact surface that contacts the inner surface of the bottom plate at the tip with a small diameter is formed.
The first clamper with the formed cylindrical fitting part and the tip
A second contact surface that contacts the outer surface of the bottom plate, and a second contact surface
Around the outer periphery of the second tapered surface contacting the protrusion
Clamp with the formed second clamper, and in this state
And the outer periphery has a convex part corresponding to the belt width.
Press the chair against the outer peripheral surface of the cylindrical part, and
1. Roller die while rotating the second clamper
The cylinder in the direction of the axis of the cylinder, and press the cylinder to
By reducing the diameter, the core and bottom plate
The belt is characterized in that a belt detachment prevention flange is formed using the protrusion .
【０００９】請求項２記載のプーリーの製造方法では、
前記円筒部の内径に対応する外径をもち、その先端を前
記底板部の内周面に当接する底板部当接面とする円柱状
の内型により、前記プーリー基材の円筒部の内周面を支
持し、また、前記円筒部と内外径を同一にしその先端を
前記円筒部の開口端に当接して支持する開口端支持部と
する円筒状の下押圧型を、前記内型の外周に嵌合して開
口端支持部で前記プーリー基材の円筒部の開口端を支持
し、また、前記円筒部外径に対応する内径に形成され内
周面で円筒部の外周面を支持する嵌合孔を有する外型で
前記プーリー基材の円筒部の外周面を支持したうえで、
前記外型の嵌合孔に摺動自在に嵌合され、その先端を前
記底板部の外面に当接して押圧する底板部押圧面とし、
該底板部押圧面の周囲を面取りして底板部押圧面と前記
外型の嵌合孔の内周面との間に環状の凹溝を形成するよ
うにした上押圧型により、前記内型と外型で円筒部の内
外周面を支持されたプーリー基材の底板部を押圧して上
押圧型の底板部押圧面と内型の底板部当接面とにより底
板部を挟圧するとともに、前記下押圧型の開口端支持部
で前記円筒部の開口端を軸方向に押圧して、プーリー基
材の円筒部の肉を前記環状の凹溝に押し出すことによ
り、プーリー基材の円筒部と底板部とのコーナーに環状
の突出部を形成し、前記突出部を形成したプーリー基材
を、円筒部の内径より小径で先端に底板部の内面に当接
する第１の当接面を形成した円柱状嵌合部をもつ第１の
クランパーと、先端に底板部の外面に当接する第２の当
接面と、第２の当接面の外周囲に、前記突出部に当接す
る第２のテーパー面を形成した第２のクランパーとでク
ランプし、この状態で、外周部がベルト幅に応じた凸面
部をもつローラーダイスを円筒部の外周面に押し付け、
ローラーダイスと第１、第２のクランパーを回転させな
がら、ローラーダイスを円筒部の軸心方向に移動させ、
円筒部を押圧しその直径を縮小させることにより、円筒
部と底板部とのコーナーに、前記突出部を利用してベル
ト外れ防止鍔を形成することを特徴とする。In the method for manufacturing a pulley according to claim 2,
An inner periphery of the cylindrical portion of the pulley base material having an outer diameter corresponding to the inner diameter of the cylindrical portion, and a cylindrical inner mold having an end thereof as a bottom plate portion abutting surface abutting against the inner peripheral surface of the bottom plate portion. A cylindrical lower pressing die having an inner end and an outer diameter which are the same as those of the cylindrical portion, and whose leading end abuts against the open end of the cylindrical portion and serves as an open end supporting portion. And the open end supporting portion supports the open end of the cylindrical portion of the pulley base material, and the inner peripheral surface formed to have an inner diameter corresponding to the outer diameter of the cylindrical portion supports the outer peripheral surface of the cylindrical portion. After supporting the outer peripheral surface of the cylindrical portion of the pulley substrate with an outer mold having a fitting hole,
The bottom plate portion pressing surface is slidably fitted into the fitting hole of the outer die, and a tip thereof abuts against and presses the outer surface of the bottom plate portion.
The inner die and the upper die are chamfered around the bottom plate pressing surface to form an annular concave groove between the bottom plate pressing surface and the inner peripheral surface of the outer die fitting hole. Pressing the bottom plate portion of the pulley base material supported on the inner and outer peripheral surfaces of the cylindrical portion by the outer die and pressing the bottom plate portion by the bottom plate pressing surface of the upper pressing type and the bottom plate contacting surface of the inner die, By pressing the open end of the cylindrical portion in the axial direction with the open-end supporting portion of the lower pressing type, and extruding the meat of the cylindrical portion of the pulley base material into the annular groove, the cylindrical portion of the pulley base material and the bottom plate are pressed. A pulley substrate having an annular protrusion formed at a corner of the pulley and having the protrusion formed thereon
Abuts the inner surface of the bottom plate at the tip with a smaller diameter than the inner diameter of the cylindrical part
A first contact having a cylindrical fitting portion having a first contact surface
A second contact which abuts against the outer surface of the bottom plate at the tip end;
Abutting against the protruding portion around the contact surface and the outer periphery of the second contact surface
With the second clamper with the second tapered surface
Ramp, and in this state, the outer peripheral part is a convex surface according to the belt width.
Press the roller die with the part against the outer peripheral surface of the cylindrical part,
Do not rotate the roller die and the first and second clampers.
Then, move the roller die in the axial direction of the cylindrical part,
By pressing the cylindrical part and reducing its diameter, the cylinder
A belt detachment preventing flange is formed at the corner between the portion and the bottom plate portion by using the protruding portion .
【００１０】以上の製造方法によれば、円筒部の底板部
側に形成されるベルト外れ防止鍔が、円筒部を底板部側
に押して円筒部と底板部とのコーナーに環状に突出形成
した突出部をもって形成されるので、ベルト外れ防止鍔
としての強度を保つための十分な肉厚として、従来の板
厚２枚分よりも薄く（狭幅に）設定することができる。
また、折曲していないので従来のような錆の発生といっ
た問題は生じない。[0010] According to the above manufacturing method, the belt detachment preventing collar formed on the bottom plate side of the cylindrical portion pushes the cylindrical portion toward the bottom plate side to protrude annularly at the corner between the cylindrical portion and the bottom plate portion. Since it is formed with a portion, it can be set to a thickness (narrower) than that of two conventional plate thicknesses as a sufficient thickness for maintaining the strength as a belt detachment prevention flange.
In addition, since it is not bent, there is no problem such as the generation of rust unlike the conventional case.
【００１１】[0011]
【発明の実施の形態】図１乃至図７は、本発明に係るプ
ーリーの製造方法の実施の形態の第１例を示したもので
ある。先ず、金属板をプレス等によって絞って円筒部１
の一端が底板部２により閉塞された形状の有底円筒体を
形成し、この有底円筒体をもって、その円筒部１をベル
ト掛部とし、その底板部２を支持部とするプーリー基材
３とする（図１）。この場合、円筒部１はベルト幅より
広幅に形成し、また底板部２の中心には孔４を設けてお
く。また、図示しないが、底板部２の中心には、必要に
応じてボス部を絞り加工により突出形成してもよい。1 to 7 show a first embodiment of a method of manufacturing a pulley according to the present invention. First, a metal plate is squeezed by a press or the like to form a cylindrical portion 1.
Is formed with a bottomed cylindrical body having one end closed by a bottom plate portion 2. With this bottomed cylindrical body, a pulley substrate 3 having the cylindrical portion 1 as a belt hook portion and the bottom plate portion 2 as a support portion. (FIG. 1). In this case, the cylindrical portion 1 is formed wider than the belt width, and a hole 4 is provided at the center of the bottom plate portion 2. Although not shown, a boss may be formed at the center of the bottom plate 2 by drawing if necessary.
【００１２】次に、図２に示すように、前記円筒部１の
内径に対応する外径をもち且つ円筒部１より短くそして
先端を前記底板部２の内面に当接する底板部当接面５と
する円柱状嵌合部６と、該円柱状嵌合部６の後端に前記
円筒部１の開口端７に当接する大径段部からなる開口端
当接部８を有する内型９をもって、前記プーリー基材３
の円筒部１内に前記円柱状嵌合部６を嵌合して円筒部１
の内周面とその開口端７を支持する。Next, as shown in FIG. 2, a bottom plate contact surface 5 having an outer diameter corresponding to the inner diameter of the cylindrical portion 1, shorter than the cylindrical portion 1, and having a tip contacting the inner surface of the bottom plate 2. And an inner die 9 having an open end contact portion 8 having a large-diameter stepped portion at the rear end of the cylindrical fit portion 6 and in contact with the open end 7 of the cylindrical portion 1. , The pulley substrate 3
The cylindrical fitting portion 6 is fitted into the cylindrical portion 1 of
And its open end 7 are supported.
【００１３】このとき、前記円柱状嵌合部６は円筒部１
より短く形成されているので、その短い分だけ円柱状嵌
合部６の底板部当接面５と前記支持されたプーリー基材
３の内面との間に間隙１０が形成される。この間隙１０
を形成する円柱状嵌合部６の長さは、後述するところの
円筒部１を底板部２方向へ押し出して円筒部１と底板部
２とのコーナーにベルト外れ防止鍔を形成するための環
状の突出部を形成する押し出し肉量に応じて設定されて
いる。At this time, the cylindrical fitting portion 6 is attached to the cylindrical portion 1.
Since it is formed shorter, a gap 10 is formed between the bottom plate contact surface 5 of the cylindrical fitting portion 6 and the inner surface of the supported pulley base material 3 by the shorter length. This gap 10
The length of the cylindrical fitting portion 6 is formed in an annular shape for extruding the cylindrical portion 1 described later in the direction of the bottom plate portion 2 to form a belt detachment preventing flange at a corner between the cylindrical portion 1 and the bottom plate portion 2. Is set in accordance with the amount of extruded meat forming the protruding portion.
【００１４】また、前記円筒部１の外径に対応する内径
に形成されその内周面で円筒部１の外周面を支持する嵌
合孔１１を有する外型１２をもって、前記プーリー基材
３の円筒部１の外周に嵌合し、外型１２の嵌合孔１１の
内周面で円筒部１の外周面を支持する。An outer die 12 having an inner diameter corresponding to the outer diameter of the cylindrical portion 1 and having a fitting hole 11 for supporting the outer peripheral surface of the cylindrical portion 1 at the inner peripheral surface thereof is provided with the outer die 12 of the pulley base material 3. The outer peripheral surface of the cylindrical portion 1 is supported by the inner peripheral surface of the fitting hole 11 of the outer die 12.
【００１５】そして、前記外型１２の嵌合孔１１に摺動
自在に嵌合されその先端を前記プーリー基材３の底板部
２の外面に当接して押圧する底板部押圧面１３とし、該
底板部押圧面１３の周囲を面取りして底板部押圧面１３
と前記外型１２の嵌合孔１１の内周面との間に環状の凹
溝１４を形成するようにした上押圧型１５をもって、前
記内型８と外型１２で支持されたプーリー基材３の底板
部２を押圧し、上押圧型１５の底板部押圧面１３と内型
９の底板部当接面５とにより挟圧する（図３）。A bottom plate pressing surface 13 slidably fitted in the fitting hole 11 of the outer die 12 and having its tip abutting against and pressing against the outer surface of the bottom plate 2 of the pulley substrate 3, Chamfering the periphery of the bottom plate pressing surface 13
A pulley substrate supported by the inner die 8 and the outer die 12 with an upper pressing die 15 having an annular groove 14 formed between the inner die 8 and the outer peripheral surface of the fitting hole 11 of the outer die 12. 3 is pressed, and is pressed between the bottom plate pressing surface 13 of the upper pressing die 15 and the bottom plate contact surface 5 of the inner die 9 (FIG. 3).
【００１６】これにより、その開口端７を開口端当接部
８に当接している円筒部１は底板部２方向に押圧を受
け、円筒部１の肉が前記環状の凹溝１４に押し出され
て、プーリー基材３の円筒部１と底板部２のコーナーに
環状の突出部１６が形成される（図４）。前記環状の凹
溝１４の深さは、前記押し出される円筒部１の肉の量に
応じて設定されている。As a result, the cylindrical portion 1 whose open end 7 is in contact with the open end contact portion 8 is pressed in the direction of the bottom plate 2, and the thickness of the cylindrical portion 1 is pushed out into the annular groove 14. Thus, annular protrusions 16 are formed at the corners of the cylindrical portion 1 and the bottom plate portion 2 of the pulley substrate 3 (FIG. 4). The depth of the annular groove 14 is set according to the thickness of the extruded cylindrical portion 1.
【００１７】このようにしてプーリー基材３の円筒部１
と底板部２のコーナーに形成された環状の突出部１６を
もってベルト掛部にベルト外れ防止鍔を形成するもので
ある。Thus, the cylindrical portion 1 of the pulley substrate 3
And an annular protrusion 16 formed at a corner of the bottom plate 2 to form a belt detachment prevention flange on the belt hook.
【００１８】前記突出部１６によるベルト外れ防止鍔の
形成は次のようにして行われる。The formation of the belt separation preventing flange by the protruding portion 16 is performed as follows.
【００１９】前記突出部１６を形成したプーリー基材３
を、円筒部１の内径より小径で先端に底板部２の内面に
当接する第１の当接面１７を形成した円柱状嵌合部１８
をもち、この円柱状嵌合部１８の基部に円筒部１の開口
端７に当接しこれを遠心方向に押し広げる第１のテーパ
ー面１９を形成し、且つ円柱状嵌合部１８の先端中央に
前記底板部２に形成されている孔４に挿入する位置決め
突起２０を形成した第１のクランパー２１と、先端に底
板部２の外面に当接する第２の当接面２２と、第２の当
接面２２の外周囲に、前記突出部１６に当接する第２の
テーパー面２３を形成し、第２の当接面２２の中央には
位置決め突起２０を嵌合させる位置決め孔２４を形成し
た第２のクランパー２５とでクランプする（図５）。The pulley substrate 3 having the projection 16 formed thereon
A cylindrical fitting portion 18 having a diameter smaller than the inner diameter of the cylindrical portion 1 and having a first contact surface 17 formed at the tip to abut against the inner surface of the bottom plate portion 2.
A first tapered surface 19 is formed at the base of the cylindrical fitting portion 18 so as to abut against the opening end 7 of the cylindrical portion 1 and spread the same in the centrifugal direction. A first clamper 21 formed with a positioning protrusion 20 to be inserted into the hole 4 formed in the bottom plate 2, a second contact surface 22 at the tip contacting the outer surface of the bottom plate 2, A second tapered surface 23 is formed around the outer periphery of the contact surface 22 to be in contact with the protrusion 16, and a positioning hole 24 for fitting the positioning projection 20 is formed in the center of the second contact surface 22. Clamp with the second clamper 25 (FIG. 5).
【００２０】この状態で図５に示すように、外周部がベ
ルト幅に応じた凸面部２６をもつローラーダイス２７を
円筒部１の外周面に押し付け、ローラーダイス２７と第
１、第２のクランパー２１，２５を回転させながら、ロ
ーラーダイス２７を円筒部１の軸心方向に移動させ、円
筒部１を押圧しその直径を縮小させる。In this state, as shown in FIG. 5, a roller die 27 having an outer peripheral portion having a convex portion 26 corresponding to the belt width is pressed against the outer peripheral surface of the cylindrical portion 1, and the roller die 27 and the first and second clampers are pressed. While rotating 21 and 25, the roller die 27 is moved in the axial direction of the cylindrical portion 1 to press the cylindrical portion 1 to reduce its diameter.
【００２１】これにより、円筒部１の外周面にベルト掛
面２８が形成され、そして、その両端即ち、円筒部１の
先端側と円筒部１の底板部２側にベルト外れ防止鍔２
９，３０が遠心方向に突出した状態で形成される（図
６）。As a result, a belt hooking surface 28 is formed on the outer peripheral surface of the cylindrical portion 1.
9 and 30 are formed in a state protruding in the centrifugal direction (FIG. 6).
【００２２】このとき、円筒部１の底板部２側に形成さ
れるベルト外れ防止鍔３０は前記円筒部１と底板部２の
コーナーに突出して形成された突出部１６によって形成
されるので、ローラーダイス２７によるベルト外れ防止
鍔３０の形成に際し、ベルト外れ防止鍔３０の形成のた
めの円筒部１からの肉の移動は必要なく或いは少量です
むので形成が容易となり、また前記突出部１６は円筒部
１の肉の移動によって形成されているので、この突出部
１６をもって形成するベルト外れ防止鍔３０の厚さはベ
ルト外れ防止鍔３０に要求される強度のために必要な厚
さに設定することができる。At this time, the belt release prevention flange 30 formed on the bottom plate 2 side of the cylindrical portion 1 is formed by the protrusion 16 formed at the corner of the cylindrical portion 1 and the bottom plate 2, so that the roller When the belt 30 is formed by the dies 27, the movement of the meat from the cylindrical portion 1 for forming the belt 30 is not necessary or only a small amount is required. Since the belt 1 is formed by the movement of the flesh, the thickness of the belt detachment preventing flange 30 formed by the protrusion 16 is set to a thickness necessary for the strength required for the belt detachment preventing flange 30. Can be.
【００２３】このようにして完成したプーリー３１はベ
ルト掛面２８が平滑なベルト掛け用プーリーとなるが、
Ｖベルトを掛けるプーリーを製造する場合は、前記のよ
うに形成されたベルト掛面２８に、図７に示すように所
定のＶベルトに応じた複数のＶ山３２をもったローダー
ダイス３３を押し当てて回転させることにより、ベルト
掛面２８に複数のＶ溝３４が形成されたプーリー３１が
完成する（図８）。The pulley 31 thus completed is a belt pulley with a smooth belt hooking surface 28.
In the case of manufacturing a pulley for hanging a V belt, a loader die 33 having a plurality of V peaks 32 corresponding to a predetermined V belt is pressed on the belt hanging surface 28 formed as described above, as shown in FIG. The pulley 31 in which the plurality of V-grooves 34 are formed on the belt hooking surface 28 is completed by rotating the belt 31 in contact (FIG. 8).
【００２４】このようにして製造されたプーリー３１
は、その円筒部１の底板部２側に形成されるベルト外れ
防止鍔３０が円筒部１の肉の移動によって形成された突
出部１６により形成されるので、そのベルト外れ防止鍔
３０の幅Ｌ１ を、従来のプーリーのような円筒部４４
と底板部４５との重なりにより形成される略２枚分の板
厚により形成されるベルト外れ防止鍔４８の幅Ｌ３ よ
り薄く（狭幅に）設定することができ、その分プーリー
３１の幅Ｌ２ も前記従来のプーリーの幅Ｌ４より狭く
することができ、プーリーの小型化が図れる。The pulley 31 thus manufactured
Since the belt detachment preventing flange 30 formed on the bottom plate 2 side of the cylindrical portion 1 is formed by the protruding portion 16 formed by the movement of the meat of the cylindrical portion 1, the width L1 of the belt detachment preventing flange 30 is formed. To a cylindrical portion 44 like a conventional pulley.
The width L2 of the pulley 31 can be set to be smaller (narrower) than the width L3 of the belt disengagement prevention collar 48 formed by the thickness of approximately two sheets formed by the overlap of the bottom plate 45 with the bottom plate 45. Can also be made narrower than the width L4 of the conventional pulley, and the size of the pulley can be reduced.
【００２５】図９、図１０は本発明に係るプーリーの製
造方法の実施の形態の第２例の一部を示すものである。
先ず、図１に示す前記プーリー基材３の円筒部１の内径
に対応する外径をもちその先端を前記底板部２の内面に
当接する底板部当接面３５とする円柱状の内型３６を、
前記プーリー基材３の円筒部１内に嵌合して円筒部１の
内周面を支持する。FIGS. 9 and 10 show a part of a second embodiment of the method for manufacturing a pulley according to the present invention.
First, a cylindrical inner mold 36 having an outer diameter corresponding to the inner diameter of the cylindrical portion 1 of the pulley substrate 3 shown in FIG. 1 and having a tip as a bottom plate portion contact surface 35 contacting the inner surface of the bottom plate 2. To
The inside of the cylindrical portion 1 of the pulley substrate 3 is fitted to support the inner peripheral surface of the cylindrical portion 1.
【００２６】また、前記円筒部１と内外径を同一にしそ
の先端を前記円筒部１の開口端７に当接して支持する開
口端支持部３７とする円筒状の下押圧型３８を、前記内
型３６の外周に嵌合して開口端支持部３７で前記プーリ
ー基材３の円筒部１の開口端７を支持する。A cylindrical downward pressing die 38 having an inner and outer diameter which is the same as that of the cylindrical portion 1 and an opening end supporting portion 37 for supporting the end by contacting the opening end 7 of the cylindrical portion 1 is provided. The open end 7 of the cylindrical portion 1 of the pulley substrate 3 is supported by the open end supporting portion 37 by fitting to the outer periphery of the mold 36.
【００２７】更に、前記円筒部１の外径に対応する内径
に形成され、内周面で円筒部１の外周面を支持する嵌合
孔３９を有する外型４０をもって、前記プーリー基材３
の円筒部１の外周に嵌合し、外型４０の嵌合孔３９の内
周面で円筒部１の外周面を支持する。Further, an outer mold 40 having an inner diameter corresponding to the outer diameter of the cylindrical portion 1 and having a fitting hole 39 for supporting the outer peripheral surface of the cylindrical portion 1 on the inner peripheral surface is provided with the pulley base material 3.
The outer peripheral surface of the cylindrical portion 1 is supported by the inner peripheral surface of the fitting hole 39 of the outer die 40.
【００２８】そして、前記外型４０の嵌合孔３９に摺動
自在に嵌合されその先端を前記プーリー基材３の底板部
２の外面に当接して押圧する底板部押圧面４１とし、該
底板部押圧面４１の周囲を面取りして底板部押圧面４１
と前記外型４０の嵌合孔３９の内周面との間に環状の凹
溝４２を形成するようにした上押圧型４３をもって、前
記内型３６と外型４０で円筒部１の内外周面を支持され
たプーリー基材３の底板部２を押圧して、上押圧型４３
の底板部押圧面４１と内型３６の底板部当接面３５とに
より底板部２を挟圧するとともに、前記下押圧型３８の
開口端支持部３７で前記円筒部１の開口端７を軸方向
（底板部側）へ押圧する（図１０）。A bottom plate pressing surface 41 is slidably fitted in the fitting hole 39 of the outer die 40 and has its tip abutting against and pressing against the outer surface of the bottom plate 2 of the pulley substrate 3. The periphery of the bottom plate pressing surface 41 is chamfered to form the bottom plate pressing surface 41.
The inner press 36 and the outer press 40 have an inner press and a press press 43 in which an annular concave groove 42 is formed between the inner press 36 and the outer press 40. By pressing the bottom plate 2 of the pulley substrate 3 whose surface is supported, the upper pressing die 43 is pressed.
The bottom plate 2 is pressed by the bottom plate pressing surface 41 of the inner die 36 and the bottom plate contact surface 35 of the inner die 36, and the open end 7 of the cylindrical portion 1 is axially moved by the open end support 37 of the lower pressing die 38. (Bottom plate side) (FIG. 10).
【００２９】これにより、円筒部１の肉が前記環状の凹
溝４２に押し出されて、プーリー基材３の円筒部１と底
板部２のコーナーに環状の突出部１６が形成される（図
１０）。As a result, the flesh of the cylindrical portion 1 is extruded into the annular groove 42 to form an annular projecting portion 16 at the corner of the cylindrical portion 1 and the bottom plate 2 of the pulley substrate 3 (FIG. 10). ).
【００３０】このようにしてプーリー基材３の円筒部１
と底板部２のコーナーに形成された環状の突出部１６を
もってベルト掛部にベルト外れ防止鍔を形成するもので
ある。前記突出部１６によるベルト外れ防止鍔の形成は
前記実施の形態の第１例と同様である。Thus, the cylindrical portion 1 of the pulley substrate 3
And an annular protrusion 16 formed at a corner of the bottom plate 2 to form a belt detachment prevention flange on the belt hook. The formation of the belt detachment prevention flange by the protruding portion 16 is the same as that of the first example of the embodiment.
【００３１】[0031]
【発明の効果】以上のように、本発明に係るプーリーの
製造方法によれば、円筒部の底板部側に形成されるベル
ト外れ防止鍔が、円筒部を底板部側に押して円筒部と底
板部とのコーナーに環状に突出形成した突出部をもって
形成されるので、ベルト外れ防止鍔としての強度を保つ
ための十分な肉厚として、従来の板厚２枚分よりも薄く
（狭幅に）設定することができ、特に自動車のエンジン
ルームのような狭い場所に取り付けるのに適するプーリ
ーを得ることができる。また、折曲による傘練り部分が
無いので従来のような錆の発生といった問題は生じな
い。As described above, according to the method of manufacturing a pulley according to the present invention, the belt detachment preventing flange formed on the bottom plate side of the cylindrical portion pushes the cylindrical portion toward the bottom plate portion to thereby form the cylindrical portion and the bottom plate. Since it is formed with a protruding portion that protrudes in an annular shape at the corner with the portion, it is thinner (narrower) than the conventional two plate thicknesses as a sufficient thickness to maintain the strength as a belt detachment prevention flange It is possible to obtain a pulley that can be set and is particularly suitable for mounting in a narrow place such as an engine room of a car. Further, since there is no umbrella kneading portion due to bending, there is no problem such as the generation of rust unlike the conventional case.
【図１】本発明に係るプーリーの製造方法の実施の形態
の第１例の工程を示す説明図である。FIG. 1 is an explanatory view showing steps of a first example of an embodiment of a method of manufacturing a pulley according to the present invention.
【図２】本発明に係るプーリーの製造方法の実施の形態
の第１例の工程を示す説明図である。FIG. 2 is an explanatory view showing a process of a first example of the embodiment of the method for manufacturing a pulley according to the present invention.
【図３】本発明に係るプーリーの製造方法の実施の形態
の第１例の工程を示す説明図である。FIG. 3 is an explanatory view showing a process of a first example of the embodiment of the method of manufacturing a pulley according to the present invention.
【図４】本発明に係るプーリーの製造方法の実施の形態
の第１例の工程を示す説明図である。FIG. 4 is an explanatory view showing steps of a first example of the embodiment of the method of manufacturing a pulley according to the present invention.
【図５】本発明に係るプーリーの製造方法の実施の形態
の第１例の工程を示す説明図である。FIG. 5 is an explanatory view showing a step of a first example of the embodiment of the method of manufacturing a pulley according to the present invention.
【図６】本発明に係るプーリーの製造方法の実施の形態
の第１例の工程を示す説明図である。FIG. 6 is an explanatory view showing steps of a first example of the embodiment of the method for manufacturing a pulley according to the present invention.
【図７】本発明に係るプーリーの製造方法の実施の形態
の第１例の工程を示す説明図である。FIG. 7 is an explanatory view showing a step of a first example of the embodiment of the method of manufacturing a pulley according to the present invention.
【図８】本発明で製造されたプーリーの一例を示す縦断
面図である。FIG. 8 is a longitudinal sectional view showing an example of a pulley manufactured according to the present invention.
【図９】本発明に係るプーリーの製造方法の実施の形態
の第２例の工程の一部を示す説明図である。FIG. 9 is an explanatory view showing a part of the process of the second example of the embodiment of the method of manufacturing a pulley according to the present invention.
【図１０】本発明に係るプーリーの製造方法の実施の形
態の第２例の工程の一部を示す説明図である。FIG. 10 is an explanatory view showing a part of steps of a second example of the embodiment of the method for manufacturing a pulley according to the present invention.
【図１１】従来の方法で製造されたプーリーを示す縦断
面図である。FIG. 11 is a longitudinal sectional view showing a pulley manufactured by a conventional method.
１ 円筒部 ２ 底板部 ３ プーリー基材 ４ 孔 ５ 底板部当接面 ６ 円柱状嵌合部 ７ 開口端 ８ 開口端当接部 ９ 内型 １０ 間隙 １１ 嵌合孔 １２ 外型 １３ 底板部押圧面 １４ 凹溝 １５ 上押圧型 １６ 突出部 １７ 第１の当説面 １８ 円柱状嵌合部 １９ 第１のテーパー面 ２０ 位置決め突起 ２１ 第１のクランパー ２２ 第２の当接面 ２３ 第２のテーパー面 ２４ 位置決め孔 ２５ 第２のクランパー ２６ 凸面部 ２７ ローラーダイス ２８ ベルト掛面 ２９ ベルト外れ防止鍔 ３０ ベルト外れ防止鍔 ３１ プーリー ３２ Ｖ山 ３３ ローラーダイス ３４ Ｖ溝 ３５ 底板部当接面 ３６ 内型 ３７ 開口端支持部 ３８ 下押圧型 ３９ 嵌合孔 ４０ 外型 ４１ 底板部押圧面 ４２ 凹溝 ４３ 上押圧型 DESCRIPTION OF SYMBOLS 1 Cylindrical part 2 Bottom plate part 3 Pulley base material 4 Hole 5 Bottom plate contact surface 6 Cylindrical fitting part 7 Open end 8 Open end contact part 9 Inner die 10 Gap 11 Fitting hole 12 Outer die 13 Bottom plate part pressing surface DESCRIPTION OF SYMBOLS 14 Concave groove 15 Upper press type 16 Projection part 17 First advisory surface 18 Columnar fitting part 19 First taper surface 20 Positioning protrusion 21 First clamper 22 Second contact surface 23 Second taper surface Reference numeral 24 Positioning hole 25 Second clamper 26 Convex part 27 Roller dice 28 Belt engaging surface 29 Belt detachment prevention flange 30 Belt detachment prevention flange 31 Pulley 32 V mountain 33 Roller die 34 V groove 35 Bottom plate part contact surface 36 Inner die 37 Opening End support part 38 Lower pressing type 39 Fitting hole 40 Outer die 41 Bottom plate part pressing surface 42 Depressed groove 43 Upper pressing type
Claims (2)
ベルト掛部、底板部を支持部とするプーリー基材とし、
前記円筒部の内径に対応する外径をもち且つ円筒部より
短くそして先端を前記底板部の内面に当接する底板部当
接面とする円柱状嵌合部と、該円柱状嵌合部の後端に前
記円筒部の開口端に当接する大径段部からなる開口端当
接部を有する内型により、前記プーリー基材の円筒部の
内周面とその開口端を支持し、 また、前記円筒部外径に対応する内径に形成され内周面
で円筒部の外周面を支持する嵌合孔を有する外型で前記
プーリー基材の円筒部の外周面を支持したうえで、 前記外型の嵌合孔に摺動自在に嵌合され、その先端を前
記底板部の外面に当接して押圧する底板部押圧面とし、
該底板部押圧面の周囲を面取りして底板部押圧面と前記
外型の嵌合孔の内周面との間に環状の凹溝を形成するよ
うにした上押圧型により、前記内型と外型で支持された
プーリー基材の底板部を押圧し、上押圧型の底板部押圧
面と内型の底板部当接面とにより底板部を挟圧して、プ
ーリー基材の円筒部の肉を前記環状の凹溝に押し出すこ
とにより、プーリー基材の円筒部と底板部とのコーナー
に環状の突出部を形成し、前記突出部を形成したプーリー基材を、円筒部の内径よ
り小径で先端に底板部の内面に当接する第１の当接面を
形成した円柱状嵌合部をもつ第１のクランパーと、先端
に底板部の外面に当接する第２の当接面と、第２の当接
面の外周囲に、前記突出部に当接する第２のテーパー面
を形成した第２のクランパーとでクランプし、 この状態で、外周部がベルト幅に応じた凸面部をもつロ
ーラーダイスを円筒部の外周面に押し付け、ローラーダ
イスと第１、第２のクランパーを回転させながら、ロー
ラーダイスを円筒部の軸心方向に移動させ、円筒部を押
圧しその直径を縮小させることにより、円筒部と底板部
とのコーナーに、前記突出部を利用して ベルト外れ防止
鍔を形成することを特徴とするプーリーの製造方法。1. A pulley substrate having a metal plate formed in a bottomed cylindrical body, a cylindrical portion serving as a belt hook portion, and a bottom plate portion serving as a support portion.
A cylindrical fitting portion having an outer diameter corresponding to the inner diameter of the cylindrical portion, being shorter than the cylindrical portion, and having a bottom plate abutting surface that abuts against the inner surface of the bottom plate portion; An inner die having an open end contact portion formed of a large-diameter stepped portion that abuts on the open end of the cylindrical portion at the end, supports the inner peripheral surface of the cylindrical portion of the pulley base material and the open end thereof, After supporting the outer peripheral surface of the cylindrical portion of the pulley base material with an outer die having a fitting hole formed at an inner diameter corresponding to the outer diameter of the cylindrical portion and supporting the outer peripheral surface of the cylindrical portion with the inner peripheral surface, the outer die The bottom plate portion pressing surface is slidably fitted into the fitting hole of the bottom plate portion, the tip of which abuts against the outer surface of the bottom plate portion to press.
The inner die and the upper die are chamfered around the bottom plate pressing surface to form an annular concave groove between the bottom plate pressing surface and the inner peripheral surface of the outer die fitting hole. The bottom plate of the pulley substrate supported by the outer mold is pressed, and the bottom plate is pressed by the bottom plate pressing surface of the upper pressing type and the bottom plate contacting surface of the inner die, and the thickness of the cylindrical portion of the pulley substrate is reduced. Is extruded into the annular groove, thereby forming an annular protrusion at the corner between the cylindrical portion and the bottom plate portion of the pulley base material.
The first contact surface that contacts the inner surface of the bottom plate at the tip with a smaller diameter
A first clamper having a formed cylindrical fitting portion;
A second contact surface that contacts the outer surface of the bottom plate portion, and a second contact surface
A second tapered surface abutting the protrusion on the outer periphery of the surface
Is clamped with a second clamper formed with a belt, and in this state, the outer peripheral portion has a convex surface portion corresponding to the belt width.
Roller die against the outer peripheral surface of the cylindrical part, and
While rotating the chair and the first and second clampers,
Move the large die in the axial direction of the cylindrical part, and push the cylindrical part.
Pressing to reduce the diameter of the cylinder and bottom plate
A belt pull-off preventing flange is formed at the corner of the pulley by using the projecting portion .
ベルト掛部、底板部を支持部とするプーリー基材とし、
前記円筒部の内径に対応する外径をもち、その先端を前
記底板部の内周面に当接する底板部当接面とする円柱状
の内型により、前記プーリー基材の円筒部の内周面を支
持し、 また、前記円筒部と内外径を同一にしその先端を前記円
筒部の開口端に当接して支持する開口端支持部とする円
筒状の下押圧型を、前記内型の外周に嵌合して開口端支
持部で前記プーリー基材の円筒部の開口端を支持し、 また、前記円筒部外径に対応する内径に形成され内周面
で円筒部の外周面を支持する嵌合孔を有する外型で前記
プーリー基材の円筒部の外周面を支持したうえで、 前記外型の嵌合孔に摺動自在に嵌合され、その先端を前
記底板部の外面に当接して押圧する底板部押圧面とし、
該底板部押圧面の周囲を面取りして底板部押圧面と前記
外型の嵌合孔の内周面との間に環状の凹溝を形成するよ
うにした上押圧型により、前記内型と外型で円筒部の内
外周面を支持されたプーリー基材の底板部を押圧して上
押圧型の底板部押圧面と内型の底板部当接面とにより底
板部を挟圧するとともに、前記下押圧型の開口端支持部
で前記円筒部の開口端を軸方向に押圧して、プーリー基
材の円筒部の肉を前記環状の凹溝に押し出すことによ
り、プーリー基材の円筒部と底板部とのコーナーに環状
の突出部を形成し、前記突出部を形成したプーリー基材を、円筒部の内径よ
り小径で先端に底板部の内面に当接する第１の当接面を
形成した円柱状嵌合部をもつ第１のクランパーと、先端
に底板部の外面に当接する第２の当接面と、第２の当接
面の外周囲に、前記突出部に当接する第２のテーパー面
を形成した第２のクランパーとでクランプし、 この状態で、外周部がベルト幅に応じた凸面部をもつロ
ーラーダイスを円筒部の外周面に押し付け、ローラーダ
イスと第１、第２のクランパーを回転させながら、ロー
ラーダイスを円筒部の軸心方向に移動させ、円筒部を押
圧しその直径を縮小させることにより、円筒部と底板部
とのコーナーに、前記突出部を利用して ベルト外れ防止
鍔を形成することを特徴とするプーリーの製造方法。2. A pulley substrate having a metal plate formed into a bottomed cylindrical body, a cylindrical portion serving as a belt hook portion, and a bottom plate portion serving as a support portion.
An inner periphery of the cylindrical portion of the pulley base material having an outer diameter corresponding to the inner diameter of the cylindrical portion, and a cylindrical inner mold having an end thereof as a bottom plate portion abutting surface abutting against the inner peripheral surface of the bottom plate portion. A cylindrical lower pressing die having an inner and outer diameter equal to that of the cylindrical portion and having an end contacting and supporting the open end of the cylindrical portion as an open end supporting portion; And the open end supporting portion supports the open end of the cylindrical portion of the pulley substrate, and the inner peripheral surface formed to have an inner diameter corresponding to the outer diameter of the cylindrical portion supports the outer peripheral surface of the cylindrical portion. After supporting the outer peripheral surface of the cylindrical portion of the pulley base material with an outer die having a fitting hole, the outer die is slidably fitted into the fitting hole of the outer die, and the tip thereof contacts the outer surface of the bottom plate portion. A bottom plate pressing surface that touches and presses,
The inner die and the upper die are chamfered around the bottom plate pressing surface to form an annular concave groove between the bottom plate pressing surface and the inner peripheral surface of the outer die fitting hole. Pressing the bottom plate portion of the pulley base material supported on the inner and outer peripheral surfaces of the cylindrical portion by the outer die and pressing the bottom plate portion by the bottom plate pressing surface of the upper pressing type and the bottom plate contacting surface of the inner die, By pressing the open end of the cylindrical portion in the axial direction with the open-end supporting portion of the lower pressing type, and extruding the meat of the cylindrical portion of the pulley base material into the annular groove, the cylindrical portion of the pulley base material and the bottom plate are pressed. An annular protrusion is formed at the corner of the cylindrical portion, and the pulley substrate having the protrusion formed is fixed to the inner diameter of the cylindrical portion.
The first contact surface that contacts the inner surface of the bottom plate at the tip with a smaller diameter
A first clamper having a formed cylindrical fitting portion;
A second contact surface that contacts the outer surface of the bottom plate portion, and a second contact surface
A second tapered surface abutting the protrusion on the outer periphery of the surface
Is clamped with a second clamper formed with a belt, and in this state, the outer peripheral portion has a convex surface portion corresponding to the belt width.
Roller die against the outer peripheral surface of the cylindrical part, and
While rotating the chair and the first and second clampers,
Move the large die in the axial direction of the cylindrical part, and push the cylindrical part.
Pressing to reduce the diameter of the cylinder and bottom plate
A belt pull-off preventing flange is formed at the corner of the pulley by using the projecting portion .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30764998A JP3351360B2 (en) | 1998-10-28 | 1998-10-28 | Method of manufacturing pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30764998A JP3351360B2 (en) | 1998-10-28 | 1998-10-28 | Method of manufacturing pulley |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000135532A JP2000135532A (en) | 2000-05-16 |
| JP3351360B2 true JP3351360B2 (en) | 2002-11-25 |
Family
ID=17971592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30764998A Expired - Fee Related JP3351360B2 (en) | 1998-10-28 | 1998-10-28 | Method of manufacturing pulley |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3351360B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854898B2 (en) * | 1981-06-18 | 1983-12-07 | アイシン精機株式会社 | Manufacturing method of V-ribbed pulley |
| JPH0741347B2 (en) * | 1985-10-16 | 1995-05-10 | 日本電装株式会社 | METHOD OF FORGING CYLINDER MEMBER HAVING FLANGE AND FORGING DEVICE THEREOF |
-
1998
- 1998-10-28 JP JP30764998A patent/JP3351360B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000135532A (en) | 2000-05-16 |
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