JP2007175772A - Method for forming cross member of push belt for continuously variable transmission - Google Patents

Method for forming cross member of push belt for continuously variable transmission Download PDF

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Publication number
JP2007175772A
JP2007175772A JP2006328858A JP2006328858A JP2007175772A JP 2007175772 A JP2007175772 A JP 2007175772A JP 2006328858 A JP2006328858 A JP 2006328858A JP 2006328858 A JP2006328858 A JP 2006328858A JP 2007175772 A JP2007175772 A JP 2007175772A
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transverse element
punched
base material
push belt
support member
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JP5072335B2 (en
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Jan Willem Nicolass Pasteuning
ウィレム ニコラス パストニング、ジャン
Jasper Feijtel
フェイテル、ジャスパー
Robert Arnoldus Andreas Mutsaers
アモルダス アンドレアス マッシャーズ、ロベルト
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • B21D53/14—Making other particular articles belts, e.g. machine-gun belts
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for forming a cross member of a push belt for a continuously variable transmission. <P>SOLUTION: The invention relates to a method for forming the cross member (10) used for a component of the continuous push belt (6) for the continuously variable transmission (1) equipped with two pulleys (4 and 5) for the tension of the push belt (6). The cross member (10) has two main faces (11 and 12) and a circumferential face extending between the main faces. Further, at least one main face (11) has upper and lower high contact zones (22; 21a and 21b). The cross member (10) is formed by punching a base material (52). A low zone (53) expanding in the direction of height is provided on the surface of the base material (52) between the upper zone of contact (22) and lower zones of contact (21a and 21b) of the cross member (51; 10) to be formed by punching. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、プッシュベルト緊張用の２つのプーリを備えた連続可変トランスミッション用の連続式プッシュベルトの部品にするための横断要素の成形方法に関する。   The present invention relates to a method for forming a transverse element for making a part of a continuous push belt for a continuously variable transmission with two pulleys for push belt tension.

この横断要素は、２つの主本体面と、その主本体面の間に延びる周囲面とを有しており、さらに、この方法においては、主本体面に高い接触領域が設けられ、
− 横断要素は、打ち抜き動作の間に、ポンチと、支持部材と、ダイとによって基礎材料から打ち抜かれ、ダイは、打ち抜かれるべき横断要素と、その支持部材と、ポンチの端部とを収容する収容空間を有しており、かつ、
− 打ち抜き動作の間、打ち抜かれるべき横断要素がポンチと支持要素との間に把持され、この工程において、ポンチおよび支持要素は、打ち抜かれるべき横断要素を基礎材料から切断するように、ダイに対して動く。
連続可変トランスミッション用のプッシュベルトは一般的に知られている。このようなプッシュベルトは、通常、比較的多数の横断要素を支持するための、２つの無端状の連続バンド形状の支持体を備えている。横断要素はこの支持体の全周上に可動に配置され、作動中、横断要素が、プッシュベルトの動きに関連する力を伝達することができる。 The transverse element has two main body surfaces and a peripheral surface extending between the main body surfaces, and in this method, the main body surface is provided with a high contact area,
The transverse element is punched out of the base material by a punch, support member and die during the punching operation, the die containing the transverse element to be punched, its support member and the end of the punch Has a storage space, and
-During the punching operation, the transverse element to be punched is gripped between the punch and the support element, and in this process, the punch and support element are against the die so as to cut the transverse element to be punched from the base material. Move.
Push belts for continuously variable transmissions are generally known. Such push belts typically comprise two endless continuous band-shaped supports for supporting a relatively large number of transverse elements. The transverse element is movably arranged on the entire circumference of the support so that, in operation, the transverse element can transmit forces related to the movement of the push belt.

横断要素に関する以下の記述において、言及する方向は、横断要素がプッシュベルトの一部を形成している状態について言うものとする。すなわち、横断要素の縦方向はプッシュベルトの周囲の方向に一致し、横断要素の垂直または高さ方向はプッシュベルトの半径方向に一致する。横断要素の幅方向は、縦方向および高さ方向の両者に直角な方向に一致する。任意の横断要素を、隣接する横断要素に対して次の横断要素または前の横断要素として指定する場合は、プッシュベルトが動く方向について言うものとする。
横断要素は、幅方向において、その両側に支持体を納めるための窪みを備えており、また、支持体を支持するための支持面を有している。横断要素と、連続可変トランスミッションのプーリのプーリディスクとの間の接触を作り出すために、横断要素には、幅方向の両側に、支持面の方向に末広がりに拡大するプーリディスク接触面が設けられる。以下の明細書において用いる「上方」および「下方」という用語は末広がりの方向について言うものとする。この末広がりは、底部から上方へ延びるものとして規定される。 In the following description of the transverse element, the direction mentioned refers to the state in which the transverse element forms part of the push belt. That is, the longitudinal direction of the transverse element coincides with the direction around the push belt, and the vertical or height direction of the transverse element coincides with the radial direction of the push belt. The width direction of the transverse element coincides with a direction perpendicular to both the longitudinal direction and the height direction. When any transverse element is designated as the next transverse element or the previous transverse element relative to an adjacent transverse element, it shall refer to the direction in which the push belt moves.
The transverse element is provided with depressions for receiving the support on both sides in the width direction, and has a support surface for supporting the support. In order to create a contact between the transverse element and the pulley disk of the pulley of the continuously variable transmission, the transverse element is provided on both sides in the width direction with pulley disk contact surfaces that diverge in the direction of the support surface. In the following specification, the terms “upper” and “lower” shall refer to the direction of diverging. This end spread is defined as extending upward from the bottom.

横断要素は、高さ方向において、底部から上方に見て順に基部、頸部および頂部を有しており、頸部の幅方向の寸法が相対的に小さくなっている。基部が支持面およびプーリディスク接触面を有している。基部は、プッシュベルトにおいて、プッシュベルトの内周側にあり、一方頂部はプッシュベルトの外周側にある。
横断要素は、２つの主本体面、すなわち前面および背面を有しており、この両面は、縦方向にほぼ直角に、相互にほぼ平行に広がっている。横断要素の前面は、プッシュベルトにおいて次の横断要素の背面に当てがわれ、一方、横断要素の背面は、プッシュベルトにおいて前の横断要素の前面に当てがわれるものとして構成される。良好かつ明確に規定された接触を実現するため、主本体面上にいくつかの接触領域を設定することが知られている。この接触領域は、それぞれその周囲の主本体面の部分よりも高い位置にある。換言すれば、横断要素は、接触領域の位置において他の箇所よりも僅かに厚くなっている。
周囲面は２つの主本体面の間に広がっており、支持面およびプーリディスク接触面はこの周囲面の一部である。 The transverse element has a base portion, a neck portion, and a top portion in order from the bottom in the height direction, and the widthwise dimension of the neck portion is relatively small. The base has a support surface and a pulley disk contact surface. In the push belt, the base is on the inner peripheral side of the push belt, while the top is on the outer peripheral side of the push belt.
The transverse element has two main body surfaces, a front surface and a back surface, both surfaces extending approximately perpendicular to the longitudinal direction and substantially parallel to each other. The front surface of the transverse element is applied to the back surface of the next transverse element in the push belt, while the back surface of the transverse element is configured to be applied to the front surface of the previous transverse element in the push belt. In order to achieve good and well-defined contact, it is known to set several contact areas on the main body surface. Each of the contact areas is at a position higher than a portion of the main body surface around the contact area. In other words, the transverse element is slightly thicker at the position of the contact area than elsewhere.
The peripheral surface extends between the two main body surfaces, and the support surface and pulley disk contact surface are part of this peripheral surface.

横断要素の前面に１つの突起部が設けられ、一方、横断要素の背面には１つの凹み部分が設けられる。突起部と凹み部分との位置は互いに一致しており、一般的に両者は頂部に設けられる。任意の横断要素の突起部は、プッシュベルトにおいて、少なくとも部分的に次の横断要素の凹み部分の中に位置しており、その結果、プッシュベルトの周方向に直角な面内における、隣接する横断要素の相互の変位が防止される。
横断要素の前面に３つの接触領域を設けることが欧州特許出願公開第１５５４５０７号明細書（特許文献１）から知られている。この３つの接触領域の内の１つは横断要素の頂部の中心の上端部近くに位置しており、残りの２つは基部の両側の横方向端部近くに位置している。この場合、この３つの接触領域は、接触領域周囲の前面の部分よりもごく僅かに高くなっている。３つの接触領域を、打ち抜き動作の間に、適切に設計された支持部材を用いて材料を押しやることによって、接触領域の外側の基礎材料の厚さを低減して形成する方法、あるいは冷間変形法によって形成する方法が記載されている。 One projection is provided on the front face of the transverse element, while one recess is provided on the rear face of the transverse element. The positions of the protrusion and the recessed portion coincide with each other, and generally both are provided on the top. The protrusion of any transverse element is located at least partially in the recess of the next transverse element on the push belt, so that the adjacent transverse in the plane perpendicular to the circumferential direction of the push belt. Mutual displacement of the elements is prevented.
It is known from EP 1554507 to provide three contact areas on the front face of the transverse element. One of the three contact areas is located near the top of the center of the top of the transverse element and the other two are located near the lateral ends on either side of the base. In this case, the three contact areas are slightly higher than the front part around the contact area. A method of forming three contact areas with reduced thickness of the base material outside the contact area by pushing the material with a suitably designed support member during the punching operation, or cold deformation A method of forming by the method is described.

実際には、この公知の方法は、特に、横断要素の頂部の上部接触領域の形成にあまり適していないことが判明した。基礎材料を押しやるのに要する力が、不都合に高いレベルのものになる可能性があり、それが打ち抜き器具の摩耗を加速することが判明したのである。さらに、この公知の打ち抜き法の精度には、特に、上部接触領域が、相対的に小さく、かつ、例えば限定された高さと横方向寸法の前記突出部分のみによって規定される場合に改善の余地が残っている。駆動ベルトの性能にとってきわめて重要であるのは、まさに横断要素の寸法精度であるので、これは問題である。単一の横断要素の厚さと、３つの接触領域の位置における駆動ベルト内の個別の横断要素の厚さとの両者が、可能な限り一定かつ再現性があるべきこと、および、この領域外の横断要素の厚さは確実に薄く、その結果、横断要素が、プッシュベルトにおいて明確に平行にかつ正確に相前後して並び得ることが特に重要である。
欧州特許出願公開第１５５４５０７号明細書 In practice, this known method has proved particularly unsuitable for the formation of the upper contact area at the top of the transverse element. It has been found that the force required to push the base material can be inconveniently high, which accelerates the wear of the punching tool. Furthermore, the accuracy of this known punching method has room for improvement, especially when the upper contact area is relatively small and is defined only by, for example, the protruding portions of limited height and lateral dimensions. Remaining. This is a problem because it is precisely the dimensional accuracy of the transverse element that is crucial to the performance of the drive belt. Both the thickness of a single transverse element and the thickness of the individual transverse elements in the drive belt at the position of the three contact areas should be as constant and reproducible as possible, and crossing outside this area It is particularly important that the thickness of the element is reliably thin, so that the transverse elements can be aligned clearly parallel and exactly in succession on the push belt.
European Patent Application No. 1554507

本発明の重要な目的は、打ち抜き工程中に生起する力と横断要素の寸法精度とに関して、打ち抜き工程を改善することにある。
この目的に対して、本発明は請求項１による横断要素の成形方法を提案する。この方法においては、基礎材料が、その低い領域においてその周囲よりも薄くなっている。このような基礎材料の新しい構成の重要な利点は、打ち抜き動作の間、支持部材によって遥かに少ない材料しか押しやる必要がないという点にある。このため、ポンチと支持部材との間に加えるべき所要把持力を大きく低減することが可能になり、これが、器具の稼動寿命と打ち抜き工程の精度との両方に有益に寄与する。この場合、低い領域の一方の下端が、打ち抜かれるべき横断要素の頸部にあることが好ましい。これによって、打ち抜き動作の間に押しやられる材料の量が最少になる。
本発明によれば、低い領域の上端の位置を、打ち抜き動作の間に基礎材料の一定量をこの領域と各接触領域との間においてなお押しやる必要があるように、基礎材料において定めることが好ましい。このような基礎材料の構成は、上部接触領域を形成する精度が、一方では低い領域を基礎材料に生成することができる精度に依存せず、あるいは他方では、基礎材料をポンチと支持部材との間に置くことができる精度にも依存しないという利点、少なくとも大きくは依存しないという利点を有している。 An important object of the present invention is to improve the punching process with respect to the forces generated during the punching process and the dimensional accuracy of the transverse elements.
For this purpose, the invention proposes a method for forming a transverse element according to claim 1. In this method, the basic material is thinner than its surroundings in its lower region. An important advantage of such a new construction of the base material is that much less material needs to be pushed by the support member during the punching operation. This makes it possible to greatly reduce the required gripping force to be applied between the punch and the support member, which beneficially contributes to both the operating life of the instrument and the accuracy of the punching process. In this case, it is preferred that the lower end of one of the lower regions is in the neck of the transverse element to be punched. This minimizes the amount of material that is pushed during the punching operation.
According to the invention, it is preferable to define the position of the upper end of the lower area in the basic material so that a certain amount of basic material still needs to be pushed between this area and each contact area during the punching operation. . Such a construction of the base material does not depend on the accuracy with which the upper contact area can be formed on the one hand, but on the other hand with the ability to produce a lower area in the base material, or on the other hand, the base material is It has the advantage that it does not depend on the precision that can be placed in between, or at least does not depend greatly.

次に本発明を、図面を参照してより詳細に説明する。図面においては、同一の参照数字は同一または類似の部品を指している。
図１は、自動車において使用する連続可変トランスミッションを概略的に示す。連続可変トランスミッションは、その全体を参照数字１で示している。
連続可変トランスミッション１は、別個のプーリ軸２、３に配置される２つのプーリ４、５を含む。無端状の連続プッシュベルト６がプーリ４、５の回りに配置され、プーリ軸２、３間にトルクを伝達する役割を果たす。各プーリ４、５は２つのプーリディスクを備えており、プッシュベルト６がこの２つのプーリディスク間に配置されて挟持される。この結果、摩擦によってプーリ４、５とプッシュベルト６との間に力を伝達することができる。
公知のプッシュベルト６は２つの無端状の支持体７を含んでおり、この２つの支持体７共、いくつかの同心リングから構成される。横断要素１０が支持体７の全長にわたって配置される。横断要素１０は、相互に隣接しており、支持体７に対して周方向に可動である。簡単化のために、図１はこの横断要素１０の若干数のみを示している。 The invention will now be described in more detail with reference to the drawings. In the drawings, the same reference numerals refer to the same or similar parts.
FIG. 1 schematically shows a continuously variable transmission for use in an automobile. The continuously variable transmission is indicated by reference numeral 1 in its entirety.
The continuously variable transmission 1 includes two pulleys 4, 5 arranged on separate pulley shafts 2, 3. An endless continuous push belt 6 is disposed around the pulleys 4 and 5 and plays a role of transmitting torque between the pulley shafts 2 and 3. Each pulley 4, 5 is provided with two pulley disks, and a push belt 6 is disposed between the two pulley disks and sandwiched. As a result, force can be transmitted between the pulleys 4 and 5 and the push belt 6 by friction.
The known push belt 6 includes two endless supports 7, both of which are composed of several concentric rings. A transverse element 10 is arranged over the entire length of the support 7. The transverse elements 10 are adjacent to each other and are movable in the circumferential direction with respect to the support 7. For simplicity, FIG. 1 shows only a few of these transverse elements 10.

図２および３は、それぞれ横断要素１０の前面および側面を示す。横断要素１０の前面はその全体が参照数字１１で示され、横断要素１０の背面の全体は参照数字１２で示されている。以下においては、前面１１および背面１２の両者を主本体面１１、１２とも呼称する。
横断要素１０は、高さ方向においては、順に、基部１３と、相対的に狭い頸部１４と、矢の頂部に類似した形状の頂部１５とを有する。プッシュベルト６においては、基部１３がプッシュベルト６の内周側にあり、頂部１５がプッシュベルト６の外周側に位置する。横断要素１０は、基部１３と頂部１５との間において、頸部１４の両側に２つの窪み１６を有している。この窪みはそれぞれ駆動ベルト６の支持体７を収容するためのものである。
横断要素１０の前面１１には突起部１７が配置される。図示の例では、突起部１７は頂部１５上にあり、背面１２の凹み部分１８の位置に対応している。凹み部分１８は図３において破線で表わされている。プッシュベルトにおいて、横断要素１０の突起部１７は、少なくとも部分的に次の横断要素１０の凹み部分１８内にある。突起部１７および対応する凹み部分１８は、隣接する横断要素１０が、プッシュベルト６の周方向に直角な面内において相互に変位するのを防止する、あるいは少なくとも制限する。 2 and 3 show the front and side of the transverse element 10, respectively. The front face of the transverse element 10 is indicated in its entirety by reference numeral 11 and the entire rear face of the transverse element 10 is indicated by reference numeral 12. Hereinafter, both the front surface 11 and the back surface 12 are also referred to as main body surfaces 11 and 12.
The transverse element 10 has, in order in the height direction, a base 13, a relatively narrow neck 14, and a top 15 having a shape similar to the top of an arrow. In the push belt 6, the base portion 13 is on the inner peripheral side of the push belt 6, and the top portion 15 is positioned on the outer peripheral side of the push belt 6. The transverse element 10 has two indentations 16 on either side of the neck 14 between the base 13 and the top 15. Each of these recesses is for accommodating a support 7 of the drive belt 6.
A protrusion 17 is arranged on the front face 11 of the transverse element 10. In the illustrated example, the protrusion 17 is on the top 15 and corresponds to the position of the recessed portion 18 of the back surface 12. The recessed portion 18 is represented by a broken line in FIG. In the push belt, the protrusion 17 of the transverse element 10 is at least partly in the recessed part 18 of the next transverse element 10. The protrusions 17 and the corresponding recesses 18 prevent or at least limit the adjacent transverse elements 10 from being displaced relative to each other in a plane perpendicular to the circumferential direction of the push belt 6.

横断要素１０の前面１１の基部１３においては、いわゆる傾斜線１９も、丸められた端部の形で設けられる。この丸められた端部は、互いに僅かな角度を有する前面１１の２つの部分間の遷移部を形成する。さらに、基部１３にはいわゆる段部２０が設けられる。この段部２０は、基部の異なる厚さの２つの部分間の遷移部を形成する。傾斜線１９および段部２０によって、２つの隣接する横断要素１０が互いに傾斜し得るようになる。
さらに、前面１１には、図２に斜線領域として表した高い接触領域２２、２１ａ、２１ｂが設定される。この接触領域２２、２１ａ、２１ｂにおいて、横断要素１０はこの領域外の部分よりも厚い。接触領域２２、２１ａ、２１ｂの目的は、プッシュベルト６において、横断要素１０が、制御されかつ正確に規定された方式で隣接する横断要素１０と接触し得るようにすることにある。第１または上部接触領域２２は、横断要素１０の頂部１５に配置され、その突起部１７の上部に置かれる。第２または下部接触領域２１ａ、２１ｂは、横断要素１０の基部１３の両側に配置される。 At the base 13 of the front face 11 of the transverse element 10, so-called inclined lines 19 are also provided in the form of rounded ends. This rounded end forms a transition between the two parts of the front face 11 that are at a slight angle to each other. Furthermore, the base 13 is provided with a so-called stepped portion 20. This step 20 forms a transition between two parts of different base thickness. The inclined line 19 and the step 20 allow two adjacent transverse elements 10 to be inclined with respect to each other.
Further, high contact areas 22, 21 a, 21 b represented as hatched areas in FIG. 2 are set on the front surface 11. In this contact area 22, 21a, 21b, the transverse element 10 is thicker than the part outside this area. The purpose of the contact areas 22, 21 a, 21 b is to enable the transverse element 10 in the push belt 6 to contact the adjacent transverse element 10 in a controlled and precisely defined manner. The first or upper contact area 22 is located at the top 15 of the transverse element 10 and is placed on top of its projection 17. Second or lower contact areas 21 a, 21 b are arranged on both sides of the base 13 of the transverse element 10.

公知の横断要素１０は、一般的に、切り出され、例えば前記の（特許文献１）に記載される打ち抜き法によって成形される。図４は、（特許文献１）に開示されている打ち抜き装置を断面図で示す。図においては、横断要素１０の一部５１、例えば頸部１４が、打ち抜き動作の間に基礎材料５２の帯材から切断されているところを断面で見ることができる。この切断を遂行するため、基礎材料５２は、打ち抜き装置の把持部品３５、４５の間、あるいは打ち抜き装置のガイドプレート３５および切断ダイ４５の間に把持される。この場合、部分５１を含む成形されるべき横断要素１０は、ポンチ３０と、いわゆるエゼクタまたは支持部材４０との間に把持される。支持部材４０が横断要素１０を押圧する力はポンチ３０の力よりも遥かに小さいので、ポンチ３０と、支持部材４０と、横断要素１０との組み合せ体が把持部品３５、４５に対して下方に動き、横断要素１０が、ダイ４５の刃によって基礎材料５２から切断される。   The known transverse element 10 is generally cut out and formed, for example, by the punching method described in the above-mentioned (Patent Document 1). FIG. 4 is a cross-sectional view of the punching device disclosed in (Patent Document 1). In the figure it can be seen in section that a part 51 of the transverse element 10, for example the neck 14, has been cut from the strip of the base material 52 during the punching operation. In order to perform this cutting, the base material 52 is gripped between the gripping parts 35, 45 of the punching device or between the guide plate 35 and the cutting die 45 of the punching device. In this case, the transverse element 10 to be molded including the part 51 is gripped between the punch 30 and a so-called ejector or support member 40. Since the force with which the support member 40 presses the transverse element 10 is much smaller than the force of the punch 30, the combination of the punch 30, the support member 40 and the transverse element 10 is downward with respect to the gripping parts 35, 45. In motion, the transverse element 10 is cut from the base material 52 by the blades of the die 45.

横断要素１０の前面１１における上記の３つの接触領域２２、２１ａ、２１ｂは、打ち抜き動作の間に、この接触領域２２、２１ａ、２１ｂ外の基礎材料５２の厚さを低減することによって成形される。これを実現するため、適切に設計された支持部材４０を用いて、その位置に（付加的な）圧力を加える。その結果、材料が局所的にある程度強制的に押し出され、強制的に押し出される材料は、例えば横断要素１０の端部に流れ出る。支持部材４０の加工表面４１が、成形されるべき横断要素１０に面しているが、この押圧加工を実行するため、支持部材４０の加工表面４１には、横断要素１０から強制的に押し出されるべき部分の位置に、より高い加工表面部分４１ａが設けられる。一方、接触領域２２、２１ａ、２１ｂが形成されるべき位置には、加工表面部分４１ｂがより低く配置される。このように形成される支持部材４０を斜視図として図５に概略的に示す。簡単化のために、合わせて形成されるべき傾斜線１９および段部２０はこの図には表わされていない。   The above three contact areas 22, 21a, 21b on the front face 11 of the transverse element 10 are shaped by reducing the thickness of the base material 52 outside this contact area 22, 21a, 21b during the punching operation. . To accomplish this, (additional) pressure is applied at that location using a suitably designed support member 40. As a result, the material is forced to some extent locally and the forced material flows out, for example, at the end of the transverse element 10. The working surface 41 of the support member 40 faces the transverse element 10 to be molded, but in order to carry out this pressing process, the working surface 41 of the support member 40 is forced out of the transverse element 10. A higher processing surface portion 41a is provided at the position of the power portion. On the other hand, the processing surface portion 41b is disposed at a lower position at the position where the contact regions 22, 21a, 21b are to be formed. The support member 40 thus formed is schematically shown in FIG. 5 as a perspective view. For the sake of simplicity, the slope line 19 and the step 20 to be formed together are not represented in this figure.

公知の打ち抜き法については、特に、必要な力が好ましからざるほど高いこと、かつ、横断要素１０の特に接触領域２２、２１ａおよび２１ｂ間の相対的に薄い部分の厚さに関して、その精度には実際に改善の余地があることが判明した。本発明の基礎となる洞察によれば、上記の問題は、少なくとも部分的に、打ち抜き動作の間に強制的に押し出さなければならない材料の量が相対的に多いことによって惹起される。これは、支持部材４０の加工表面４１の高い部分４１ａと低い部分４１ｂとの間の高い表面積比によって示されるとおりである。   For the known punching methods, the accuracy is actually not as high as the required force is undesirably high, and especially with respect to the thickness of the relatively thin part of the transverse element 10 between the contact areas 22, 21a and 21b. It has been found that there is room for improvement. According to the insight underlying the present invention, the above problems are caused, at least in part, by the relatively large amount of material that must be forced out during the punching operation. This is as indicated by the high surface area ratio between the high portion 41a and the low portion 41b of the processed surface 41 of the support member 40.

本発明によれば、基礎材料５２の表面に低い領域５３を設けることによって重要な改善を達成することが可能になる。この低い領域５３の位置において、基礎材料５２はこの領域外の部分よりも薄くなっており、この低い領域５３は、打ち抜かれるべき横断要素１０の上部接触領域２２と下部接触領域２１ａ、２１ｂとの間に配置される。このような基礎材料５２の新しい構成の重要な利点は、打ち抜き動作の間に、支持部材４０によって押しやらなければならない材料が大幅に少ないという点にある。基礎材料５２のこのような構成を図６に例示する。
図６は、基礎材料５２の帯材を断面図（図Ａ）および平面図（図Ｂ）として示す。平面図（図Ｂ）においては、１回の打ち抜き動作において打ち抜かれる横断要素１０の位置５５と同様に、既に帯材５２から打ち抜かれた横断要素１０の輪郭５４も見ることができる。この例においては、４つの位置５５が同時に打ち抜かれ、それぞれ２つの横断要素１０が互いに反対側に配置されている。各打ち抜き動作の後、打ち抜かれた横断要素１０を取り除き、次の打ち抜き動作において新しい横断要素１０を基礎材料５２の帯材から打ち抜くことができるように、基礎材料５２の帯材を、ポンチ３０と支持部材４０との間において（図６Ｂの左から右へ）移動させる。 According to the present invention, significant improvements can be achieved by providing a low region 53 on the surface of the base material 52. At the location of this lower region 53, the base material 52 is thinner than the part outside this region, which lower region 53 is between the upper contact region 22 and the lower contact regions 21a, 21b of the transverse element 10 to be punched out. Arranged between. An important advantage of such a new construction of the base material 52 is that much less material has to be pushed by the support member 40 during the punching operation. Such a configuration of the base material 52 is illustrated in FIG.
FIG. 6 shows a strip of the base material 52 as a cross-sectional view (FIG. A) and a plan view (FIG. B). In the plan view (FIG. B), the contour 54 of the transverse element 10 already punched from the strip 52 can be seen as well as the position 55 of the transverse element 10 punched in a single punching operation. In this example, four positions 55 are stamped simultaneously, and two transverse elements 10 are arranged on opposite sides of each other. After each punching operation, the punched transverse element 10 is removed and the base material 52 strip is punched with the punch 30 so that a new transverse element 10 can be punched from the base material 52 strip in the next punching operation. It moves between the support members 40 (from left to right in FIG. 6B).

図６は、低い領域５３、この場合帯状形状の領域５３が基礎材料５２の表面に設けられることを示している。この低い領域５３においては、基礎材料５２はそれ以外の部分よりも薄くなっており、この低い領域５３は、その両側において、基礎材料５２の高く厚い領域５６に隣接している。低い領域５３は、打ち抜かれるべき横断要素１０の上部接触領域２２の正確に下側の位置にある。図６では、低い領域５３が、横断要素１０の頸部１４のほぼ半分まで延びている。本発明によれば、この場合、打ち抜き動作の間支持部材４０に作用する力を均衡させるために、低い領域５３が、基部１３から約１ｍｍの距離までそのまま続かなければならない。本発明によれば、低い領域５３は、高い領域５６のおよそ０．０５ｍｍ下にあることが好ましい。すなわち、低い領域５３の範囲においては、基礎材料５２が、その周囲よりも約０．０５ｍｍだけ薄いことが好ましい。   FIG. 6 shows that a low region 53, in this case a strip-shaped region 53, is provided on the surface of the base material 52. In this low region 53, the base material 52 is thinner than the rest, and this low region 53 is adjacent to the high and thick region 56 of the base material 52 on both sides thereof. The lower area 53 is exactly below the upper contact area 22 of the transverse element 10 to be punched. In FIG. 6, the low region 53 extends to approximately half of the neck 14 of the transverse element 10. According to the invention, in this case, the low region 53 must continue from the base 13 to a distance of about 1 mm in order to balance the forces acting on the support member 40 during the punching operation. According to the present invention, the low region 53 is preferably approximately 0.05 mm below the high region 56. That is, in the region of the low region 53, the base material 52 is preferably thinner by about 0.05 mm than its surroundings.

さらに、本発明によれば、低い領域５３の位置を、基礎材料５２において、この領域５３と上部接触領域２２との間において、基礎材料５２の帯材５７を、打ち抜き動作の間になお押しやらなければならないように定めると有利である。打ち抜き工程のこのような配置を図７に示す。図７は、支持部材４０の一部と、打ち抜かれるべき基礎材料５２の一部とを断面で概略的に示している。
以上説明した方法は、上部接触領域２２を形成する精度が、一方では低い領域５３を基礎材料５２に配置することができる精度に依存せず、あるいは他方では、基礎材料５２をポンチ３０と支持部材４０との間に位置決めすることができる精度にも依存しないという利点、または少なくとも大きくは依存しないという利点を有している。本発明によれば、支持部材４０の加工表面４１の高い部分４１ａと、基礎材料５２における低い領域５３との間の距離が約０．１ｍｍであれば、この目的に十分である。 Furthermore, according to the present invention, the position of the low region 53 is pushed in the base material 52 between this region 53 and the upper contact region 22 and the strip 57 of the base material 52 is still pushed during the punching operation. It is advantageous to determine that this must be done. Such an arrangement of the punching process is shown in FIG. FIG. 7 schematically shows in cross section a part of the support member 40 and a part of the basic material 52 to be punched.
The method described above does not depend on the accuracy with which the upper contact area 22 is formed, on the one hand, where the low area 53 can be placed on the base material 52, or on the other hand, the base material 52 is placed on the punch 30 and the support member. 40 has the advantage of not depending on the accuracy that can be positioned between 40, or at least not greatly dependent. According to the invention, it is sufficient for this purpose if the distance between the high part 41a of the working surface 41 of the support member 40 and the low region 53 of the basic material 52 is about 0.1 mm.

最後に、低い領域５３を活用することによる付随的な意図として、打ち抜き動作の間に生起する材料の流れが大幅に少ないという点を注記しておかなければならない。特に、横断要素１０の前面１１の部分で、ポンチから基礎材料５２の方に向けられるピン（図示せず）と支持部材４０における窪み４２（図５に同様に示す）との間の相互作用によって突起部１７が形成される箇所とその近傍との部分においても然りである。実際、突起部１７は容易に成形し得るものではないことが判明していた。すなわち、凹み部分１８の周囲の背面１２に材料の不足が生じる場合がある。この結果、横断要素１０が好ましくないほど薄くなり、しかもこの場合、この薄くなる現象が相対的に大きな面積に及ぶのである。従って、本発明は、横断要素成形方法のためのさらなる改善をも提供するものであり、これが、図７にも表わされている。
本発明によれば、支持部材４０には、この場合、突起形状の窪み４２の周囲に環状の厚い部分４３が設けられる。この厚い部分４３によって、基礎材料５２の低い領域５３における材料の流れが局所的にさらに誘起される。すなわち、成形されるべき突起部１７の周囲に沿って、一定量の材料が押しやられ、これによって突起部１７の成形を促進することができる。厚い部分４３は多くの基礎材料５２を押しやることが好ましい。それによって、凹み部分１８の周囲の横断要素１０の背面１２がほぼ平坦な状態に維持される。環状の厚い部分４３の外径は、材料の流れが、打ち抜き工程の間、基礎材料５２における低い領域５３を超えて広がるように選定するのが好ましい（図示せず）。 Finally, it should be noted that as a concomitant intention by exploiting the low area 53, there is significantly less material flow occurring during the punching operation. In particular, in the part of the front face 11 of the transverse element 10, by the interaction between a pin (not shown) directed from the punch towards the base material 52 and a recess 42 (also shown in FIG. 5) in the support member 40. The same applies to the portion where the protrusion 17 is formed and the vicinity thereof. In fact, it has been found that the protrusion 17 cannot be easily molded. That is, there may be a shortage of material on the back surface 12 around the recessed portion 18. As a result, the transverse element 10 becomes undesirably thin, and in this case this thinning phenomenon covers a relatively large area. Thus, the present invention also provides a further improvement for the transverse element forming method, which is also represented in FIG.
According to the invention, the support member 40 is in this case provided with an annular thick part 43 around the projection-shaped recess 42. This thick part 43 further induces a material flow locally in the lower region 53 of the base material 52. In other words, a certain amount of material is pushed along the periphery of the protrusion 17 to be formed, thereby promoting the formation of the protrusion 17. The thick portion 43 preferably pushes a lot of base material 52. Thereby, the back surface 12 of the transverse element 10 around the recessed portion 18 is maintained in a substantially flat state. The outer diameter of the annular thick portion 43 is preferably selected so that the material flow extends beyond the lower region 53 in the base material 52 during the stamping process (not shown).

プッシュベルトを備えた連続可変トランスミッションの側面を概略的に示す。1 schematically shows a side view of a continuously variable transmission with a push belt. 連続可変トランスミッションのプッシュベルト用の横断要素の前面を示す。Fig. 4 shows the front of a transverse element for a continuously variable transmission push belt. 図２の横断要素の側面を示す。Fig. 3 shows a side view of the transverse element of Fig. 2; 横断要素製造用の公知の打ち抜き装置の概略を示す。1 shows a schematic of a known punching device for producing transverse elements. 公知の打ち抜き装置のいわゆる支持部材を概略的に示す。1 schematically shows a so-called support member of a known punching device. 本発明による横断要素成形方法に使用する基礎材料の帯材を示す。1 shows a strip of basic material used in a transverse element forming method according to the present invention. 本発明による方法の可能な配置の第１および第２の詳細を概略的に示す。Fig. 2 schematically shows first and second details of a possible arrangement of the method according to the invention.

符号の説明Explanation of symbols

１ 連続可変トランスミッション ２、３ プーリ軸
４、５ プーリ ６ プッシュベルト
７ 支持体 １０ 横断要素
１１ 主本体面、前面 １２ 主本体面、背面
１３ 基部 １４ 頸部
１５ 頂部 １６ 窪み
１７ 突起部 １８ 凹み部分
１９ 傾斜線 ２０ 段部
２１ａ、２１ｂ 接触領域
２２ 接触領域 ３０ ポンチ
３５ 把持部品／ガイドプレート
４０ 支持部材 ４１ａ 高い加工表面部分
４１ｂ 低い加工表面部分
４２ 窪み ４３ 厚い部分
４５ 把持部品／ダイ ５１ 横断要素の一部
５２ 基礎材料 ５３ 低い領域
５４ 横断要素の輪郭 ５５ 打ち抜かれる横断要素の位置
５６ 高い領域 ５７ 基礎材料の帯材 DESCRIPTION OF SYMBOLS 1 Continuously variable transmission 2, 3 Pulley shaft 4, 5 Pulley 6 Push belt 7 Support body 10 Transverse element 11 Main body surface, front surface 12 Main body surface, back surface 13 Base 14 Neck portion 15 Top portion 16 Depression 17 Protrusion portion 18 Depression portion 19 Inclined line 20 Step 21a, 21b Contact area 22 Contact area 30 Punch 35 Gripping part / guide plate 40 Support member 41a High machining surface part 41b Lower machining surface part 42 Depression 43 Thick part 45 Gripping part / die 51 Part of transverse element 52 Base material 53 Low region 54 Crossing element outline 55 Position of the transverse element to be punched 56 High region 57 Base material strip

Claims (5)

プッシュベルト（６）緊張用の２つのプーリ（４、５）を備えた連続可変トランスミッション（１）用の連続式プッシュベルト（６）の部品にするための横断要素（１０）の成形方法であり、該横断要素（１０）は、２つの主本体面（１１、１２）と、該主本体面間に延びる周囲面とを有すると共に、高さ方向においては、基部（１３）と、相対的に狭い頸部（１４）と、頂部（１５）とから構成されており、さらに、該主本体面（１１；１２）には、該横断要素（１０）の頂部（１５）に高い上部接触領域（２２）が設けられ、かつ、該主本体面（１１；１２）には、該横断要素（１０）の基部（１３）に高い下部接触領域（２１ａ；２１ｂ）が設けられ、
―該横断要素（１０）は、打ち抜き動作の間に、ポンチ（３０）と、支持部材（４０）と、ダイ（４５）とによって基礎材料（５２）から打ち抜かれ、該ダイ（４５）は、打ち抜かれるべき該横断要素（５１；１０）と、該支持部材（４０）と、該ポンチ（３０）の端部とを収容する収容空間を有しており、かつ、
―打ち抜き動作の間、打ち抜かれるべき該横断要素（５１；１０）が該ポンチ（３０）と該支持要素（４０）との間に把持され、この工程において、該ポンチ（３０）および該支持要素（４０）は、打ち抜かれるべき該横断要素（５１；１０）を該基礎材料（５２）から切断しつつ、該ダイ（４５）に対して動く、横断要素（１０）の成形方法において、
該基礎材料（５２）の表面に、打ち抜かれるべき該横断要素（５１；１０）の上部接触領域（２２）と下部接触領域（２１ａ；２１ｂ）との間に広がる低い領域（５３）が設けられることを特徴とする方法。 Push belt (6) is a method of forming a transverse element (10) to be a part of a continuous push belt (6) for a continuously variable transmission (1) with two pulleys (4, 5) for tension The transverse element (10) has two main body surfaces (11, 12) and a peripheral surface extending between the main body surfaces, and is relatively relative to the base (13) in the height direction. It consists of a narrow neck (14) and a top (15), and the main body surface (11; 12) has a high upper contact area (15) on the top (15) of the transverse element (10). 22) and the main body surface (11; 12) is provided with a high lower contact area (21a; 21b) at the base (13) of the transverse element (10),
The transverse element (10) is punched out of the base material (52) by a punch (30), a support member (40) and a die (45) during the punching operation, the die (45) A receiving space for receiving the transverse element (51; 10) to be punched, the support member (40) and the end of the punch (30); and
-During the punching operation, the transverse element (51; 10) to be punched is gripped between the punch (30) and the support element (40), in this process the punch (30) and the support element (40) in a method of forming a transverse element (10), which moves relative to the die (45) while cutting the transverse element (51; 10) to be punched from the base material (52),
The surface of the base material (52) is provided with a low region (53) extending between the upper contact region (22) and the lower contact region (21a; 21b) of the transverse element (51; 10) to be punched out. A method characterized by that. 前記低い領域（５３）が、前記基礎材料（５２）の帯材の長手方向に帯状の形状で設けられることを特徴とする請求項１に記載の方法。   The method according to claim 1, characterized in that the low region (53) is provided in the form of a strip in the longitudinal direction of the strip of the base material (52). 打ち抜かれるべき前記横断要素（５１；１０）の高さの方向において、前記低い領域（５３）の横方向寸法が、前記上部接触領域（２２）と前記下部接触領域（２１ａ；２１ｂ）との間のその方向の距離よりも小さく、打ち抜き動作の間に、基礎材料（５２）の一定量を前記低い領域（５３）のどちらの側においてもなお押しやる必要があることを特徴とする請求項１または請求項２に記載の方法。   In the direction of the height of the transverse element (51; 10) to be punched, the lateral dimension of the lower area (53) is between the upper contact area (22) and the lower contact area (21a; 21b). 2 or 3, wherein a certain amount of basic material (52) still needs to be pushed on either side of the lower region (53) during the punching operation. The method of claim 2. 前記低い領域（５３）が、打ち抜かれるべき前記横断要素（５１；１０）の前記頸部（１４）の中に及ぶことを特徴とする請求項１〜３のいずれか１項に記載の方法。   4. A method according to any one of the preceding claims, characterized in that the lower region (53) extends into the neck (14) of the transverse element (51; 10) to be punched. 打ち抜かれるべき前記横断要素（５１；１０）に面する前記支持部材（４０）の加工表面（４１）に窪み（４２）が設けられ、該窪み（４２）の周囲に沿って該支持部材（４０）に厚い部分（４３）が設けられ、該厚い部分（４３）は少なくとも該加工表面（４１）の周囲部分（４１ａ）の上部に突き出ていることを特徴とする請求項１〜４のいずれか１項に記載の方法。   A recess (42) is provided in the working surface (41) of the support member (40) facing the transverse element (51; 10) to be punched, and the support member (40) along the periphery of the recess (42). 5) is provided with a thick part (43), and the thick part (43) protrudes at least above the peripheral part (41a) of the processing surface (41). 2. The method according to item 1.
JP2006328858A 2005-12-27 2006-12-05 Method for forming transverse element of push belt for continuously variable transmission Expired - Fee Related JP5072335B2 (en)

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JP2013519556A (en) * 2010-02-12 2013-05-30 ジョンソン・コントロールズ・ゲー・エム・ベー・ハー Method for making high-strength parts by thermal stamping
JP2018187676A (en) * 2017-04-28 2018-11-29 本田技研工業株式会社 Method for manufacturing metal element for stepless speed change device
US11072016B2 (en) 2017-04-28 2021-07-27 Honda Motor Co., Ltd. Method for manufacturing metal element for continuously variable transmission

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