JP2015027696A - Method for forming pulley for belt type cvt, and pulley for belt type cvt formed with the forming method - Google Patents

Method for forming pulley for belt type cvt, and pulley for belt type cvt formed with the forming method Download PDF

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JP2015027696A
JP2015027696A JP2013170563A JP2013170563A JP2015027696A JP 2015027696 A JP2015027696 A JP 2015027696A JP 2013170563 A JP2013170563 A JP 2013170563A JP 2013170563 A JP2013170563 A JP 2013170563A JP 2015027696 A JP2015027696 A JP 2015027696A
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pulley
belt
forming
roller
type cvt
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孝二 檜垣
Koji Higaki
孝二 檜垣
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Nihon Spindle Manufacturing Co Ltd
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Nihon Spindle Manufacturing Co Ltd
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Priority to PCT/JP2014/063294 priority patent/WO2014208220A1/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
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/261—Making other particular articles wheels or the like pulleys
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/02—Making articles shaped as bodies of revolution discs; disc wheels
    • B21H1/04—Making articles shaped as bodies of revolution discs; disc wheels with rim, e.g. railways wheels or pulleys
    • 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/52—Pulleys or friction discs of adjustable construction
    • F16H55/56—Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pulleys (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a method for forming a pulley for a belt type CVT, which is free from problems of residual stress, distortion and defect due to weld, has high strength, is uniform, reduced in weight, and inexpensive, by integrally forming a belt sliding surface part of a circular cone shape and a cylindrical shaft part from a raw material.SOLUTION: The method for forming a pulley for a belt type includes: tearing a disk-shaped raw material W0 from the outer peripheral surface toward the central part to a position corresponding to an outer peripheral surface of a shaft part 22 by using a tearing roller R1 while rotating the raw material W0; compressing one side W1b of the torn raw material W1 to reduce the diameter by using a forming roller R2; ironing a cylindrical shaft part W2b, formed by the forming roller R2, by using an ironing roller R3 while pressing to a mold D2 to form a cylindrical shaft part W3b; and ironing the other side W1a of the torn raw material W1 by using an ironing roller R4 while pressing to a mold D1 to form a belt sliding surface part W4a of a circular cone shape.

Description

本発明は、ベルト式ＣＶＴ用プーリーの成形方法及びその成形方法によって成形されたベルト式ＣＶＴ用プーリーに関するものである。   The present invention relates to a belt-type CVT pulley molding method and a belt-type CVT pulley molded by the molding method.

自動車や自動二輪車に用いられているベルト式無段変速機（本明細書において、「ベルト式ＣＶＴ」という。）（例えば、特許文献１参照。）は、従来から汎用されてきている自動変速機（ＡＴ）と比較すると、変速ショックがなく、滑らかな加速が得られることや燃費の点で有利である。
そのため、近年、ベルト式ＣＶＴを搭載した自動車や自動二輪車が増加してきた。 BACKGROUND ART A belt type continuously variable transmission (referred to as “belt type CVT” in this specification) used in automobiles and motorcycles (for example, refer to Patent Document 1) is an automatic transmission that has been widely used in the past. Compared with (AT), there is no shift shock, and it is advantageous in that smooth acceleration can be obtained and fuel consumption.
Therefore, in recent years, automobiles and motorcycles equipped with a belt type CVT have increased.

ベルト式ＣＶＴは、図１に示すように、入力プーリー２０１と出力プーリー２０２と、入力プーリー２０１及び出力プーリー２０２に巻き掛けられた金属製のベルト３とを備えたものが一般的である。
入力プーリー２０１及び出力プーリー２０２は、それぞれ２つのプーリー２の摺動面２１ａを間隔可変（溝幅可変）の状態で対面させるようにし、ベルト３とプーリー２の接触半径を変化させることによって、変速を可能とするようにしている。 As shown in FIG. 1, the belt type CVT generally includes an input pulley 201, an output pulley 202, and a metal belt 3 wound around the input pulley 201 and the output pulley 202.
The input pulley 201 and the output pulley 202 are changed in speed by changing the contact radius between the belt 3 and the pulley 2 so that the sliding surfaces 21a of the two pulleys 2 face each other with a variable interval (variable groove width). To make it possible.

ところで、このベルト式ＣＶＴ１は、より具体的には、ベルト３は、２つの無端状のスチールバンド３２を並置し、この２つのバンド３２の対向する周縁に、鋼製のエの字状のブロック３１（金属エレメント）を周方向に沿って複数枚嵌め込んだ構造とされている。   By the way, in this belt type CVT1, more specifically, in the belt 3, two endless steel bands 32 are juxtaposed, and steel E-shaped blocks are formed on the opposite peripheral edges of the two bands 32. A structure in which a plurality of 31 (metal elements) are fitted along the circumferential direction is employed.

また、入力プーリー２０１及び出力プーリー２０２は、例えば、図２に示すような、円筒状の軸部２２に、摺動面２１ａを備えた円錐状のベルト摺動面部２１を一体に形成してなる、２つの入れ子式のシーブ２Ａ、２Ｂから構成されている。   Further, the input pulley 201 and the output pulley 202 are formed by integrally forming a conical belt sliding surface portion 21 having a sliding surface 21a on a cylindrical shaft portion 22 as shown in FIG. It is composed of two nested sheaves 2A, 2B.

特開２００９−１８５３２１号公報JP 2009-185321 A

ところで、ベルト式ＣＶＴ１の入力プーリー２０１及び出力プーリー２０２を構成するシーブ２Ａ、２Ｂは、鍛造成形した中間素材に切削（削り出し）加工を施すようにしたり、円錐状のベルト摺動面部２１と筒状の軸部２２とを、個別に製造し、両者を溶接によって接合することで一体に形成することにより、最終製品を得るようにしている。
このため、前者の製造方法では、切削量が多く、材料のロスにより製品コストが上昇するという問題があり、また、後者の製造方法では、接合部Ｘに、溶接による残留応力や歪、さらには、欠陥が発生するという問題があった。 By the way, the sheaves 2A and 2B constituting the input pulley 201 and the output pulley 202 of the belt type CVT 1 are made to cut (cut out) the forged intermediate material, or the conical belt sliding surface portion 21 and the cylinder. The shaft 22 is manufactured separately, and both are joined together by welding to form a final product.
For this reason, in the former manufacturing method, there is a problem that the amount of cutting is large and the product cost is increased due to material loss. In the latter manufacturing method, residual stress and strain due to welding, There was a problem that defects occurred.

本発明は、上記従来のベルト式ＣＶＴ用プーリーの有する問題点に鑑み、円錐状のベルト摺動面部と筒状の軸部とを、素材から一体で成形することにより、溶接に伴う残留応力、歪及び欠陥の問題をなくし、強度が高く、均一で、軽量化した、低コストのベルト式ＣＶＴ用プーリーの成形方法及びその成形方法によって成形されたベルト式ＣＶＴ用プーリーを提供することを目的とする。   In view of the problems of the conventional belt-type CVT pulley, the present invention integrally forms a conical belt sliding surface portion and a cylindrical shaft portion from a raw material, so that residual stress accompanying welding, An object of the present invention is to provide a low-cost belt-type CVT pulley molding method that eliminates the problems of distortion and defects, has high strength, is uniform, and is lightweight, and a belt-type CVT pulley molded by the molding method. To do.

上記目的を達成するため、本発明のベルト式ＣＶＴ用プーリーの成形方法は、円筒状の軸部に、円錐状のベルト摺動面部を一体に形成してなるベルト式ＣＶＴ用プーリーの成形方法であって、円板状の素材を回転させながら、該素材を、その外周側から中心部に向けて軸部の外周面に相当する位置まで裂開ローラーを用いて裂開し、該裂開した素材の一方側を、成形ローラーを用いて圧縮、縮径することにより、円筒状の軸部を形成するとともに、裂開した素材の他方側を、しごきローラーを用いて金型に押し当てながらしごき成形することにより、円錐状のベルト摺動面部を形成することを特徴とする。   In order to achieve the above object, the method for forming a belt-type CVT pulley of the present invention is a belt-type CVT pulley forming method in which a conical belt sliding surface is integrally formed on a cylindrical shaft portion. Then, while rotating the disc-shaped material, the material was cleaved using a cleaving roller from the outer peripheral side toward the center part to a position corresponding to the outer peripheral surface of the shaft part, and the material was cleaved. A cylindrical shaft is formed by compressing and reducing the diameter of one side of the material using a molding roller, and the other side of the cleaved material is pressed against the mold using a squeezing roller. By forming, a conical belt sliding surface portion is formed.

この場合において、外周部をいずれか一方側に折り曲げた円板状の素材を、その外周側から中心部に向けて軸部の外周面に相当する位置まで裂開ローラーを用いて裂開するようにすることができる。   In this case, the disc-shaped material whose outer peripheral portion is bent to one side is to be cleaved using a cleaving roller from the outer peripheral side toward the central portion to a position corresponding to the outer peripheral surface of the shaft portion. Can be.

また、裂開ローラーに、片刃仕様又は両刃仕様のものを用いることができる。   Moreover, the thing of a single blade specification or a double blade specification can be used for a tearing roller.

また、成形ローラーを用いて形成した円筒状の軸部を、しごきローラーを用いて金型に押し当てながらしごき成形することができる。   Moreover, ironing can be performed while pressing a cylindrical shaft portion formed using a forming roller against a mold using an ironing roller.

また、本発明のベルト式ＣＶＴ用プーリーは、上記ベルト式ＣＶＴ用プーリーの成形方法によって成形されたベルト式ＣＶＴ用プーリーである。   The belt-type CVT pulley of the present invention is a belt-type CVT pulley formed by the above-described method for forming a belt-type CVT pulley.

本発明のベルト式ＣＶＴ用プーリーの成形方法及びその成形方法によって成形されたベルト式ＣＶＴ用プーリーによれば、円錐状のベルト摺動面部と筒状の軸部とを、素材から一体で成形することにより、溶接に伴う残留応力、歪及び欠陥の問題をなくし、強度が高く、均一で、軽量化したベルト式ＣＶＴ用プーリーを低コストで製造することができる。   According to the belt-type CVT pulley molding method of the present invention and the belt-type CVT pulley molded by the molding method, the conical belt sliding surface portion and the cylindrical shaft portion are integrally molded from the material. This eliminates the problems of residual stress, distortion, and defects associated with welding, and can produce a belt type CVT pulley having high strength, uniformity, and light weight at low cost.

また、外周部をいずれか一方側に折り曲げた円板状の素材を、その外周側から中心部に向けて軸部の外周面に相当する位置まで裂開ローラーを用いて裂開するようにすることにより、円錐状のベルト摺動面部と筒状の軸部の体積（肉量）が異なるプーリーの体積（肉量）の調整を、簡易に、かつ、精度よく行うことができる。   Further, the disc-shaped material having the outer peripheral part bent to one side is torn using a tearing roller from the outer peripheral side toward the center part to a position corresponding to the outer peripheral surface of the shaft part. This makes it possible to easily and accurately adjust the pulley volume (the amount of meat) in which the volume (wall amount) of the conical belt sliding surface portion and the cylindrical shaft portion are different.

また、裂開ローラーに、片刃仕様又は両刃仕様のものを用いることにより、最終的に円筒状の軸部に成形される素材の一方側を椀状に形成し、最終的に円錐状のベルト摺動面部に成形される素材の他方側を円板状又は椀状に形成することができる。   In addition, by using a single-blade or double-blade specification for the tearing roller, one side of the material finally formed on the cylindrical shaft portion is formed into a bowl shape, and finally a conical belt slide is formed. The other side of the material formed on the moving surface portion can be formed into a disk shape or a bowl shape.

また、成形ローラーを用いて形成した円筒状の軸部を、しごきローラーを用いて金型に押し当てながらしごき成形する工程を付加することにより、円筒状の軸部の成形を、高精度に行うことができる。   In addition, the cylindrical shaft portion formed using the forming roller is added to the mold using the ironing roller while pressing against the mold, thereby forming the cylindrical shaft portion with high accuracy. be able to.

ベルト式ＣＶＴの説明図である。It is explanatory drawing of belt type CVT. ベルト式ＣＶＴ用プーリーの説明図である。It is explanatory drawing of the pulley for belt type CVT. 本発明のベルト式ＣＶＴ用プーリーの成形方法の一実施例を示す工程説明図である。It is process explanatory drawing which shows one Example of the shaping | molding method of the pulley for belt type CVT of this invention. 本発明のベルト式ＣＶＴ用プーリーの成形方法の第１変形実施例を示す工程説明図である。It is process explanatory drawing which shows the 1st modification Example of the shaping | molding method of the pulley for belt type CVT of this invention. 本発明のベルト式ＣＶＴ用プーリーの成形方法の第２変形実施例を示す工程説明図である。It is process explanatory drawing which shows the 2nd modification of the shaping | molding method of the pulley for belt type CVT of this invention.

以下、本発明のベルト式ＣＶＴ用プーリーの成形方法及びその成形方法によって成形されたベルト式ＣＶＴ用プーリーの実施の形態を、図面に基づいて説明する。   Hereinafter, embodiments of a belt-type CVT pulley molding method and a belt-type CVT pulley molded by the molding method of the present invention will be described with reference to the drawings.

図３に、本発明のベルト式ＣＶＴ用プーリーの成形方法の一実施例を示す。
このベルト式ＣＶＴ用プーリーの成形方法は、円筒状の軸部２２に、円錐状のベルト摺動面部２１を一体に形成してなるベルト式ＣＶＴ用プーリーを構成するシーブ２Ａ（２Ｂ）の成形方法に関するもので、以下の工程からなるものである。 FIG. 3 shows an embodiment of a method for forming a pulley for belt type CVT of the present invention.
This belt type CVT pulley molding method is a molding method of a sheave 2A (2B) that constitutes a belt type CVT pulley in which a conical belt sliding surface portion 21 is integrally formed on a cylindrical shaft portion 22. It consists of the following processes.

まず、図３（ａ）に示す、所定の鋼材等からなる金属製の円板状の素材Ｗ０を回転させながら、図３（ｂ）に示すように、素材Ｗ０を、その外周側、より具体的には、外周面から中心部に向けて軸部２２の外周面に相当する位置まで裂開ローラーＲ１を用いて裂開するようにする。
この場合、裂開ローラーＲ１は、片刃仕様のものを用いるようにし、これにより、最終的に円筒状の軸部２２に成形される素材Ｗ１の一方側Ｗ１ｂが椀状に形成され、最終的に円錐状のベルト摺動面部２１に成形される素材Ｗ１の他方側Ｗ１ａは、円板状を維持した状態とされる。 First, while rotating a metal disk-shaped material W0 made of a predetermined steel material or the like shown in FIG. 3 (a), the material W0 is made more concrete on its outer peripheral side as shown in FIG. 3 (b). Specifically, tearing is performed using the tearing roller R1 from the outer peripheral surface toward the center portion to a position corresponding to the outer peripheral surface of the shaft portion 22.
In this case, the tearing roller R1 is a one-blade specification, whereby one side W1b of the material W1 finally formed on the cylindrical shaft portion 22 is formed in a bowl shape, and finally The other side W1a of the material W1 formed on the conical belt sliding surface portion 21 is maintained in a disk shape.

次に、図３（ｃ）に示すように、裂開した素材Ｗ１の一方側Ｗ１ｂを、成形ローラーＲ２を用いて圧縮、縮径し、円筒状の軸部Ｗ２ｂを形成する。
この場合、成形ローラーＲ２は、円柱仕様のものを好適に用いることができ、これにより、最終的に円筒状の軸部２２に成形される素材Ｗ１の一方側Ｗ１ｂを、円筒状の軸部Ｗ２ｂに形成する。
また、この実施例において、円筒状の軸部Ｗ２ｂの成形を、成形ローラーＲ２単独で行うようにしたが、図３（ｄ）に示すように、金型Ｄ２を併用することもできる。 Next, as shown in FIG. 3 (c), one side W1b of the material W1 that has been cleaved is compressed and reduced in diameter using a molding roller R2, thereby forming a cylindrical shaft portion W2b.
In this case, as the forming roller R2, a cylinder having a cylindrical specification can be suitably used. As a result, the one side W1b of the material W1 finally formed into the cylindrical shaft portion 22 is replaced with the cylindrical shaft portion W2b. To form.
In this embodiment, the cylindrical shaft portion W2b is molded by the molding roller R2 alone. However, as shown in FIG. 3D, a mold D2 can be used in combination.

さらに、図３（ｄ）に示すように、成形ローラーＲ２を用いて形成した円筒状の軸部Ｗ２ｂを、しごきローラーＲ３を用いて金型Ｄ２に押し当てながらしごき成形することにより、最終形状に近い円筒状の軸部Ｗ３ｂに成形する。
なお、この工程は、成形ローラーＲ２を用いて形成した円筒状の軸部Ｗ２ｂが、最終形状に近い所定の成形精度を満たす場合には、省略することもできる。 Further, as shown in FIG. 3 (d), the cylindrical shaft portion W2b formed using the forming roller R2 is ironed while being pressed against the mold D2 using the ironing roller R3, thereby obtaining a final shape. Molded to a near cylindrical shaft W3b.
In addition, this process can also be abbreviate | omitted when the cylindrical axial part W2b formed using the shaping | molding roller R2 satisfy | fills the predetermined shaping | molding precision close | similar to a final shape.

一方、図３（ｅ）に示すように、裂開した素材Ｗ１の他方側Ｗ１ａを、しごきローラーＲ４を用いて金型Ｄ１に押し当てながらしごき成形することにより、最終形状に近い円錐状のベルト摺動面部Ｗ４ａに成形する。
この場合、しごきローラーＲ４は、しごきローラーＲ３と共用することができる。 On the other hand, as shown in FIG. 3E, a conical belt close to the final shape is formed by ironing the other side W1a of the split material W1 against the mold D1 using the ironing roller R4. The sliding surface portion W4a is formed.
In this case, the ironing roller R4 can be shared with the ironing roller R3.

このようにして、最終形状に近い円錐状のベルト摺動面部Ｗ４ａ及び円筒状の軸部Ｗ３ｂに成形した素材Ｗ４に、切削加工を施すことにより、図３（ｆ）に示す、円筒状の軸部２２に、円錐状のベルト摺動面部２１を一体に形成してなるベルト式ＣＶＴ用プーリーを構成するシーブ２Ａ（２Ｂ）を得ることができる。
なお、上記切削加工は、しごき加工によって素材Ｗ４が最終形状に近い形状まで成形されているため、従来の鍛造成形した中間素材に切削（削り出し）加工を施す場合と比較して、切削量が極めて少なく、材料のロスによる製品コストの上昇はほとんどない。 In this way, by cutting the material W4 formed into the conical belt sliding surface portion W4a and the cylindrical shaft portion W3b close to the final shape, the cylindrical shaft shown in FIG. A sheave 2A (2B) constituting a belt-type CVT pulley in which a conical belt sliding surface portion 21 is formed integrally with the portion 22 can be obtained.
In the above cutting process, since the material W4 is formed to a shape close to the final shape by ironing, the cutting amount is smaller than that in the case of cutting (cutting out) a conventional forged intermediate material. Very little and there is almost no increase in product cost due to material loss.

このベルト式ＣＶＴ用プーリーの成形方法によれば、円錐状のベルト摺動面部２１と筒状の軸部２２とを、素材Ｗ０から一体で成形することができ、これにより、溶接に伴う残留応力、歪及び欠陥の問題をなくし、円錐状のベルト摺動面部２１から筒状の軸部２２にかけてメタルフローが連続し、強度が高く、均一で、軽量化したベルト式ＣＶＴ用プーリーを低コストで製造することができる。   According to this method for forming a pulley for a belt type CVT, the conical belt sliding surface portion 21 and the cylindrical shaft portion 22 can be integrally formed from the material W0, whereby residual stress accompanying welding can be obtained. The belt-type CVT pulley, which eliminates the problems of distortion and defects, has a continuous metal flow from the conical belt sliding surface portion 21 to the cylindrical shaft portion 22, has a high strength, is uniform, and is lightweight, at low cost. Can be manufactured.

ところで、上記実施例においては、素材Ｗ０を、その外周面から中心部に向けて軸部２２の外周面に相当する位置まで裂開ローラーＲ１を用いて裂開するようにしているが、その際、裂開する位置を、素材Ｗ０の厚さ方向で調整することにより、すなわち、素材Ｗ１の一方側Ｗ１ｂ及び他方側Ｗ１ａの厚さを変えることにより、円錐状のベルト摺動面部２１と筒状の軸部２２の体積（肉量）が異なるプーリーを構成するシーブ２Ａ（２Ｂ）の体積（肉量）の調整をすることができる。
しかしながら、円錐状のベルト摺動面部２１と筒状の軸部２２の体積（肉量）が大きく異なるプーリーを構成するシーブ２Ａ（２Ｂ）の体積（肉量）の調整は、素材Ｗ１の一方側Ｗ１ｂ及び他方側Ｗ１ａの厚さを変えることだけでは不可能な場合がある。 By the way, in the said Example, although the raw material W0 is made to tear using the tearing roller R1 to the position corresponded to the outer peripheral surface of the axial part 22 toward the center part from the outer peripheral surface, By adjusting the tearing position in the thickness direction of the material W0, that is, by changing the thickness of the one side W1b and the other side W1a of the material W1, the conical belt sliding surface portion 21 and the cylindrical shape are changed. The volume (meat amount) of the sheaves 2A (2B) constituting the pulleys with different volume (meat amount) of the shaft portion 22 can be adjusted.
However, the adjustment of the volume (the amount of meat) of the sheave 2A (2B) constituting the pulley in which the volume (the amount of the wall) of the conical belt sliding surface portion 21 and the cylindrical shaft portion 22 is greatly different is performed on one side of the material W1. It may not be possible to change only the thicknesses of W1b and the other side W1a.

そこで、図４に示す、本発明のベルト式ＣＶＴ用プーリーの成形方法の第１変形実施例のように、外周部をいずれか一方側に折り曲げた円板状の素材Ｗ０’を、その外周側、より具体的には、円板状の素材Ｗ０’の円板部Ｗａの延長線上に位置する傾斜面部Ｗｂから中心部に向けて軸部２２の外周面に相当する位置まで、図３（ｂ）に記載した裂開ローラーＲ１を用いて裂開するようにする。
ここで、外周部をいずれか一方側に折り曲げた円板状の素材Ｗ０’は、所定の鋼材等からなる金属製の円板状の素材Ｗ０を回転させながら、図４（ａ’）に示すように、押圧ローラーＲ０を用いて押圧成形するようにしたり（この場合、必要に応じて素材Ｗ０の背面側に金型（図示省略）を設けることができる。）、素材Ｗ０をプレス成形することにより得ることができる。
これにより、円錐状のベルト摺動面部２１と筒状の軸部２２の体積（肉量）が大きく異なるプーリーを構成するシーブ２Ａ（２Ｂ）の体積（肉量）の調整を、簡易に、かつ、精度よく行うことができる。 Therefore, as shown in FIG. 4, the disk-shaped material W0 ′ with the outer peripheral portion bent to one side is changed to the outer peripheral side as in the first modified embodiment of the method for forming the belt-type CVT pulley of the present invention. More specifically, from the inclined surface portion Wb positioned on the extension line of the disk portion Wa of the disk-shaped material W0 ′ to the position corresponding to the outer peripheral surface of the shaft portion 22 toward the center portion, FIG. Cleaving using the cleaving roller R1 described in (1).
Here, the disk-shaped material W0 ′ whose outer peripheral portion is bent to one side is shown in FIG. 4A ′ while rotating the metal disk-shaped material W0 made of a predetermined steel material or the like. As described above, press molding is performed using the pressure roller R0 (in this case, a mold (not shown) can be provided on the back side of the material W0 as necessary), or the material W0 is press molded. Can be obtained.
Thereby, the adjustment of the volume (the amount of meat) of the sheave 2A (2B) constituting the pulley in which the volume (the amount of the wall) of the conical belt sliding surface portion 21 and the cylindrical shaft portion 22 is greatly different can be easily performed. Can be done accurately.

ところで、上記各実施例においては、裂開ローラーＲ１に、片刃仕様のものを用いることにより、最終的に円筒状の軸部２２に成形される素材Ｗ１の一方側Ｗ１ｂを椀状に形成し、最終的に円錐状のベルト摺動面部２１に成形される素材Ｗ１の他方側Ｗ１ａを円板状に形成するようにしたが、図５に示す、本発明のベルト式ＣＶＴ用プーリーの成形方法の第２変形実施例のように、裂開ローラーＲ１に、両刃仕様のものを用いることもできる。
これにより、最終的に円筒状の軸部２２に成形される素材Ｗ１の一方側Ｗ１ｂを椀状に形成し、最終的に円錐状のベルト摺動面部２１に成形される素材Ｗ１の他方側Ｗ１ａを椀状に形成することができる。 By the way, in each said Example, by using the thing of single blade specification for the tearing roller R1, the one side W1b of the raw material W1 finally shape | molded by the cylindrical axial part 22 is formed in a bowl shape, Although the other side W1a of the material W1 finally formed on the conical belt sliding surface portion 21 is formed in a disk shape, the belt-type CVT pulley molding method of the present invention shown in FIG. As in the second modified embodiment, a double-blade specification can be used as the tearing roller R1.
Thereby, one side W1b of the material W1 finally formed on the cylindrical shaft portion 22 is formed in a bowl shape, and the other side W1a of the material W1 finally formed on the conical belt sliding surface portion 21 is formed. Can be formed into a bowl shape.

具体的には、図５（ａ）に示す、所定の鋼材等からなる金属製の円板状の素材Ｗ０を回転させながら、図５（ｂ）に示すように、素材Ｗ０を、その外周側、より具体的には、外周面から中心部に向けて軸部２２の大径部２２ｂの外周面に相当する位置まで両刃仕様の裂開ローラーＲ１を用いて裂開するようにする。
そして、裂開を行った後、裂開ローラーＲ１を、裂開した素材Ｗ１の一方側Ｗ１ｂの軸方向に横移動させ、円筒状の大径部Ｗ１２ｂ（図５（ｃ）参照。）を形成する。 Specifically, as shown in FIG. 5B, while rotating the metal disk-shaped material W0 made of a predetermined steel material or the like shown in FIG. More specifically, tearing is performed using a double-blade tearing roller R1 from the outer peripheral surface toward the center portion to a position corresponding to the outer peripheral surface of the large diameter portion 22b of the shaft portion 22.
Then, after cleaving, the cleaving roller R1 is laterally moved in the axial direction of one side W1b of the cleaved material W1 to form a cylindrical large-diameter portion W12b (see FIG. 5C). To do.

次に、図５（ｃ）に示すように、裂開した素材Ｗ１の一方側Ｗ１ｂを、成形ローラーＲ２を用いて圧縮、縮径し、円筒状の軸部Ｗ２ｂを形成する。
この場合、成形ローラーＲ２は、円柱仕様のものを好適に用いることができ、これにより、最終的に円筒状の軸部２２に成形される素材Ｗ１の一方側Ｗ１ｂを、円筒状の軸部Ｗ２ｂに形成する。
円筒状の軸部Ｗ２ｂの成形は、成形ローラーＲ２単独で行うようにするほか、金型Ｄ２を併用することもできる。 Next, as shown in FIG. 5 (c), one side W1b of the material W1 that has been cleaved is compressed and reduced in diameter using a molding roller R2, thereby forming a cylindrical shaft portion W2b.
In this case, as the forming roller R2, a cylinder having a cylindrical specification can be suitably used. As a result, the one side W1b of the material W1 finally formed into the cylindrical shaft portion 22 is replaced with the cylindrical shaft portion W2b. To form.
The cylindrical shaft portion W2b can be molded by the molding roller R2 alone or in combination with the mold D2.

さらに、図５（ｄ）に示すように、成形ローラーＲ２を用いて形成した円筒状の軸部Ｗ２ｂを、しごきローラーＲ３を用いて金型Ｄ２に押し当てながらしごき成形することにより、最終形状に近い円筒状の軸部Ｗ３ｂに成形する。
なお、この工程は、成形ローラーＲ２を用いて形成した円筒状の軸部Ｗ２ｂが、最終形状に近い所定の成形精度を満たす場合には、省略することもできる。 Further, as shown in FIG. 5 (d), the cylindrical shaft portion W2b formed using the forming roller R2 is ironed while being pressed against the mold D2 using the ironing roller R3, thereby obtaining a final shape. Molded to a near cylindrical shaft W3b.
In addition, this process can also be abbreviate | omitted when the cylindrical axial part W2b formed using the shaping | molding roller R2 satisfy | fills the predetermined shaping | molding precision close | similar to a final shape.

一方、図５（ｅ）に示すように、裂開した素材Ｗ１の他方側Ｗ１ａを、しごきローラーＲ４を用いて金型Ｄ１に押し当てながらしごき成形することにより、最終形状に近い円錐状のベルト摺動面部Ｗ４ａに成形する。
この場合、しごきローラーＲ４は、しごきローラーＲ３と共用することができる。 On the other hand, as shown in FIG. 5E, a conical belt close to the final shape is formed by ironing while pressing the other side W1a of the split material W1 against the mold D1 using the ironing roller R4. The sliding surface portion W4a is formed.
In this case, the ironing roller R4 can be shared with the ironing roller R3.

このようにして、最終形状に近い円錐状のベルト摺動面部Ｗ４ａ及び円筒状の軸部Ｗ３ｂに成形した素材Ｗ４に、切削加工を施すことにより、図５（ｆ）に示す、円筒状の軸部２２に、大径部２２ｂ及び円錐状のベルト摺動面部２１を一体に形成してなるベルト式ＣＶＴ用プーリーを構成するシーブ２Ａ（２Ｂ）を得ることができる。   In this way, by cutting the material W4 formed into the conical belt sliding surface portion W4a and the cylindrical shaft portion W3b close to the final shape, the cylindrical shaft shown in FIG. A sheave 2A (2B) that constitutes a belt-type CVT pulley in which the large-diameter portion 22b and the conical belt sliding surface portion 21 are formed integrally with the portion 22 can be obtained.

以上、本発明のベルト式ＣＶＴ用プーリーの成形方法及びその成形方法によって成形されたベルト式ＣＶＴ用プーリーについて、その実施の形態に基づいて説明したが、本発明は上記実施の形態に記載した構成に限定されるものではなく、各実施例に記載した構成を適宜組み合わせる等、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。   The belt-type CVT pulley molding method of the present invention and the belt-type CVT pulley molded by the molding method have been described based on the embodiments, but the present invention is configured as described in the above embodiments. However, the present invention is not limited thereto, and the configuration can be appropriately changed within a range not departing from the gist, such as appropriately combining the configurations described in the embodiments.

本発明のベルト式ＣＶＴ用プーリーの成形方法及びその成形方法によって成形されたベルト式ＣＶＴ用プーリーは、円錐状のベルト摺動面部と筒状の軸部とを、素材から一体で成形することにより、溶接に伴う残留応力、歪及び欠陥の問題をなくし、強度が高く、均一で、軽量化したベルト式ＣＶＴ用プーリーを低コストで製造することができることから、ベルト式ＣＶＴ用プーリーの用途に好適に用いることができる。   The belt-type CVT pulley molding method of the present invention and the belt-type CVT pulley molded by the molding method are formed by integrally molding a conical belt sliding surface portion and a cylindrical shaft portion from a material. Suitable for belt type CVT pulleys because it eliminates the problems of residual stress, distortion and defects associated with welding, and can produce high strength, uniform, and light weight pulleys for belt type CVTs at low cost. Can be used.

１ ベルト式ＣＶＴ
２ プーリー
２Ａ シーブ
２Ｂ シーブ
２１ ベルト摺動面部
２１ａ 摺動面
２２ 軸部
Ｗ０ 素材
Ｒ１ 裂開ローラー
Ｒ２ 成形ローラー
Ｒ３ しごきローラー
Ｒ４ しごきローラー 1 Belt CVT
2 Pulley 2A Sheave 2B Sheave 21 Belt sliding surface portion 21a Sliding surface 22 Shaft portion W0 Material R1 Cleaving roller R2 Forming roller R3 Ironing roller R4 Ironing roller

Claims (6)

円筒状の軸部に、円錐状のベルト摺動面部を一体に形成してなるベルト式ＣＶＴ用プーリーの成形方法であって、円板状の素材を回転させながら、該素材を、その外周側から中心部に向けて軸部の外周面に相当する位置まで裂開ローラーを用いて裂開し、該裂開した素材の一方側を、成形ローラーを用いて圧縮、縮径することにより、円筒状の軸部を形成するとともに、裂開した素材の他方側を、しごきローラーを用いて金型に押し当てながらしごき成形することにより、円錐状のベルト摺動面部を形成することを特徴とするベルト式ＣＶＴ用プーリーの成形方法。   A method of forming a pulley for a belt-type CVT in which a conical belt sliding surface is integrally formed on a cylindrical shaft, and the material is rotated on the outer circumference side while rotating a disk-shaped material. By cleaving using a cleaving roller to a position corresponding to the outer peripheral surface of the shaft portion from the center to the center, and compressing and reducing the diameter of one side of the cleaved material using a molding roller. Forming a conical belt sliding surface part by forming the shaft part of the shape and squeezing while pressing the other side of the split material against the mold using a squeezing roller. A method for forming a pulley for a belt type CVT. 外周部をいずれか一方側に折り曲げた円板状の素材を、その外周側から中心部に向けて軸部の外周面に相当する位置まで裂開ローラーを用いて裂開することを特徴とする請求項１記載のベルト式ＣＶＴ用プーリーの成形方法。   A disc-shaped material whose outer peripheral portion is bent to one side is cleaved using a cleaving roller from the outer peripheral side toward the center portion to a position corresponding to the outer peripheral surface of the shaft portion. The method for forming a pulley for a belt type CVT according to claim 1. 裂開ローラーに片刃仕様のものを用いることを特徴とする請求項１又は２記載のベルト式ＣＶＴ用プーリーの成形方法。   The method for forming a pulley for a belt type CVT according to claim 1 or 2, wherein a one-blade specification is used for the tearing roller. 裂開ローラーに両刃仕様のものを用いることを特徴とする請求項１又は２記載のベルト式ＣＶＴ用プーリーの成形方法。   The method for forming a pulley for a belt type CVT according to claim 1 or 2, wherein a two-blade specification is used for the tearing roller. 成形ローラーを用いて形成した円筒状の軸部を、しごきローラーを用いて金型に押し当てながらしごき成形することを特徴とする請求項１、２、３又は４記載のベルト式ＣＶＴ用プーリーの成形方法。   5. The belt-type CVT pulley according to claim 1, wherein the cylindrical shaft portion formed by using a forming roller is ironed while being pressed against a mold using an ironing roller. Molding method. 請求項１、２、３、４又は５記載のベルト式ＣＶＴ用プーリーの成形方法によって成形されたベルト式ＣＶＴ用プーリー。   A belt-type CVT pulley molded by the belt-type CVT pulley molding method according to claim 1, 2, 3, 4 or 5.
JP2013170563A 2013-06-27 2013-08-20 Method for forming pulley for belt type cvt, and pulley for belt type cvt formed with the forming method Pending JP2015027696A (en)

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JP2000233249A (en) * 1996-08-15 2000-08-29 Gates Power Drive Prod Inc Method for forming pulley having hub
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JP2000233249A (en) * 1996-08-15 2000-08-29 Gates Power Drive Prod Inc Method for forming pulley having hub
JPH10216881A (en) * 1997-02-06 1998-08-18 Nippon Spindle Mfg Co Ltd Manufacture of poly v-pulley
JP2007268571A (en) * 2006-03-31 2007-10-18 Nippon Spindle Mfg Co Ltd Drawing method and apparatus

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