WO2018221645A1 - Endless ring manufacturing method and endless ring - Google Patents

Endless ring manufacturing method and endless ring Download PDF

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Publication number
WO2018221645A1
WO2018221645A1 PCT/JP2018/020933 JP2018020933W WO2018221645A1 WO 2018221645 A1 WO2018221645 A1 WO 2018221645A1 JP 2018020933 W JP2018020933 W JP 2018020933W WO 2018221645 A1 WO2018221645 A1 WO 2018221645A1
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WO
WIPO (PCT)
Prior art keywords
ring
endless
opening
manufacturing
endless ring
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PCT/JP2018/020933
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French (fr)
Japanese (ja)
Inventor
亨 越智
亘 石原
孝幸 三宅
匡彦 勝田
伊藤　洋平
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アイシン・エィ・ダブリュ株式会社
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Publication of WO2018221645A1 publication Critical patent/WO2018221645A1/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
    • B21D53/14—Making other particular articles belts, e.g. machine-gun belts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • 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

Definitions

  • the invention of the present disclosure disclosed in the present specification relates to an endless ring manufacturing method and an endless ring.
  • Each push sesame includes a body part, a pair of pillar parts, and a pair of bowl-shaped parts.
  • the body portion has two side contact surfaces that are inclined so as to be in frictional contact with both inner side surfaces of the annular V groove of the pulley on both outer side surfaces, and a band mounting surface for mounting the band.
  • the pair of pillar portions are erected from the body portion along an extension line of the side contact surface of the body portion.
  • a pair of hook-shaped parts are extended inward from the front-end
  • An opening for inserting a plurality of hands arranged in layers is formed between the pair of hook-shaped portions.
  • the band inserted from the opening of the push sesame is placed on the band placement surface at the upper end of the body part.
  • the width of the opening is slightly narrower than the width of the band, and a single retainer (retainer ring) wider than the opening is used as the outermost layer of the band in order to securely hold the push sesame and the band. It is arranged on the outer periphery.
  • the retainer is assembled by bending it into an inverted U-shaped cross section and pushing the retainer in a state where the width of the retainer is made smaller than the width of the opening of the sesame, and is inserted into the opening.
  • the retainer is formed with a long hole in order to facilitate bending and improve the assembly workability.
  • the manufacture of an endless ring such as a band (binding ring) or a retainer (retainer ring) includes a welding process in which end portions of a band-shaped metal plate are butted and welded to form an endless cylindrical body, and a cylindrical body. It can be performed by sequentially executing a cutting step for cutting into a ring body having a predetermined width, a rolling step for rolling the ring body, and a circumferential length adjusting step for adjusting the circumferential length of the rolled ring body.
  • a cutting step for cutting into a ring body having a predetermined width
  • a rolling step for rolling the ring body
  • a circumferential length adjusting step for adjusting the circumferential length of the rolled ring body.
  • an opening forming step is further added. At this time, in what order and how the opening forming steps are executed can be recognized as an important issue in securing high quality.
  • the manufacturing method of the endless ring according to the present disclosure is mainly intended to enable an endless ring having an opening to be manufactured with high quality, and to suppress an excessive stress from acting locally when a tension is applied. Moreover, the endless ring of this indication aims at suppressing that an excessive stress acts locally when tension
  • the endless ring manufacturing method and the endless ring of the present disclosure employ the following means in order to achieve the above-described main object.
  • An endless ring manufacturing method is an endless ring manufacturing method for manufacturing an endless ring used for a transmission belt of a belt-type continuously variable transmission, in which end portions of a belt-shaped metal plate are butted and welded endlessly.
  • Welding step for forming the cylindrical body a cutting step for cutting the cylindrical body into a ring body having a predetermined width, a rolling step for rolling the ring body, and a circumferential length for adjusting the circumferential length of the rolled ring body
  • the gist is to include an adjusting step and an opening forming step of forming an opening at a position that does not reach the welded portion of the ring body in the width direction of the ring body with respect to the ring body having an adjusted circumference.
  • a welding process, a cutting process, a rolling process, and a circumferential length adjusting process are sequentially performed.
  • the opening formation process which forms an opening with respect to a ring body is performed after a circumference adjustment process.
  • the opening forming step the opening is formed at a position that does not reach the welded portion of the ring body in the width direction of the ring body.
  • An endless ring of the present disclosure is an endless ring that is used for a transmission belt of a belt-type continuously variable transmission and is formed by abutting and welding end portions of a band-shaped metal plate, and the width direction of the endless ring
  • the gist of the present invention is that an opening is formed at a position that does not reach the welded portion of the endless ring.
  • the opening is formed at a position that does not reach the welded portion of the endless ring in the width direction of the endless ring, excessive stress is applied to the welded portion or the opening when tension is applied. It can suppress acting.
  • FIG. 1 is a configuration diagram of a continuously variable transmission 1 having a transmission belt 10.
  • FIG. 2 is a partial cross-sectional view of a transmission belt 10.
  • FIG. 1 is an external view of a retainer ring 30.
  • FIG. 4A is an explanatory view showing the long hole 30o and the welded portion 30w of the retainer ring 30 of the present embodiment
  • FIG. 4B is an explanatory view showing the long hole 130o and the welded portion 130w of the retainer ring 130 of the comparative example.
  • 5A to 5P are process diagrams showing the manufacturing process of the retainer ring 30.
  • FIG. FIG. 3 is a configuration diagram of a punching device 40.
  • 7A and 7B are explanatory diagrams showing the state of the R attaching step.
  • FIG. 1 is a configuration diagram of a continuously variable transmission 1 having a transmission belt 10.
  • the continuously variable transmission 1 includes a primary shaft 2 as a drive side rotation shaft, a primary pulley 3 that rotates integrally with the primary shaft 2, and a driven side rotation shaft that is arranged in parallel with the primary shaft 2.
  • Secondary shaft 4 a secondary pulley 5 that rotates integrally with the secondary shaft 4, a transmission belt wound around a pulley groove (V-shaped groove) of the primary pulley 3 and a pulley groove (V-shaped groove) of the secondary pulley 5.
  • the primary shaft 2 is connected to an input shaft connected to a power source such as an engine via a forward / reverse switching mechanism.
  • the secondary shaft 4 is connected to the drive shaft via a gear mechanism or a differential gear.
  • the continuously variable transmission 1 can change the torque transmitted to the primary shaft 2 steplessly and output it to the secondary shaft 4 by changing the groove width of the primary pulley 3 and the groove width of the secondary pulley 5. .
  • FIG. 2 is a partial cross-sectional view showing the transmission belt 10.
  • the transmission belt 10 includes a single laminated ring 12 formed by laminating a plurality of (in this embodiment, nine) ring members 11 in the ring radial direction (thickness direction), and a laminated ring 12.
  • the plurality of ring members 11 constituting the laminated ring 12 are obtained by welding strips cut out from steel plate drums in a ring shape, and having substantially the same thickness and different perimeters predetermined for each. It is processed to have.
  • Each element 20 is punched from a steel plate by, for example, press working, and as shown in FIG. 2, a main body portion 21 that extends horizontally in the drawing, and extends in the same direction from both end portions of the main body portion 21. It has a pair of pillar part 22 and the recessed part 23 as a ring accommodating part defined between a pair of pillar part 22 so that it might open to the extension side of each pillar part 22. As shown in FIG.
  • the pair of pillar portions 22 are arranged in the radial direction of the laminated ring 12 from both sides in the width direction of the saddle surface 23 s which is the bottom surface of the recessed portion 23 (in the direction from the inner circumferential side to the outer circumferential side of the laminated ring 12, that is, upper in FIG. 2).
  • a pair of hook portions 22f projecting in the width direction of the saddle surface 23s is formed at the extending end portion of each pillar portion 22.
  • the pair of hook portions 22f protrude so as to be opposed to each other with an interval slightly longer than the width of the laminated ring 12 (ring material 11). As shown in FIG.
  • the laminated ring 12 is disposed in the concave portion 23, and the saddle surface 23 s of the concave portion 23 is in contact with the inner peripheral surface of the laminated ring 12, that is, the inner peripheral surface of the innermost ring material 11. ing.
  • the retainer ring 30 is formed by welding a strip cut out from a steel plate drum into a ring shape, and has a thickness substantially the same as or thinner than the ring material 11 and a longer circumference than the outermost ring material 11. It is formed by a length and a width longer than the interval between the pair of hook portions 22f.
  • the retainer ring 30 is elastically deformed in the width direction in a state in which the laminated ring 12 is accommodated in the recesses 23 of all the elements 20, and is fitted into the recesses 23 between the pair of hook portions 22f of each element 20. It is.
  • the retainer ring 30 is disposed between the outer peripheral surface of the ring material 11 of the outermost layer of the multilayer ring 12 and the inner peripheral surface of the hook portion 22f of each element 20, and surrounds the multilayer ring 12, and each element 20 Is prevented from falling off the laminated ring 12.
  • the retainer ring 30 is formed with an opening (long hole) 30o as shown in FIG. 3, which makes it easy to elastically deform the retainer ring 30 in the width direction. Adequacy can be secured.
  • FIG. 4A is an explanatory view showing the long hole 30o and the welded portion 30w of the retainer ring 30 of the present embodiment
  • FIG. 4B is an explanatory view showing the long hole 130o and the welded portion 130w of the retainer ring 130 of the comparative example.
  • the retainer rings 30 and 130 are formed by welding strips in a ring shape and extending them to a desired peripheral length. For this reason, if the retainer rings 30 and 130 are extended in a state where the influence of welding remains, constriction occurs in the welded portions 30w and 130w as shown exaggeratedly in FIGS. 4A and 4B.
  • FIG. 4A is an explanatory view showing the long hole 30o and the welded portion 30w of the retainer ring 30 of the present embodiment
  • FIG. 4B is an explanatory view showing the long hole 130o and the welded portion 130w of the retainer ring 130 of the comparative example.
  • the retainer rings 30 and 130 are formed by welding strips in a ring shape
  • the opening 130 o of the retainer ring 130 of the comparative example is formed so that a part thereof covers the welded portion 130 w in the width direction.
  • the width of the opening 130o is a
  • the width from the width direction end of the non-welded part to the edge of the opening 130o is X
  • the width of the opening 130o from the width direction end of the welded part 130w is X ′
  • the constriction depth of the welded portion 130w is t
  • the width of the non-welded portion is L
  • the cross-sectional area reduction rate at the welded portion 130w can be expressed by X ′ / X. .
  • the opening 30o of the retainer ring 30 of this embodiment is formed so as not to reach the welded portion 30w in the width direction, as shown in FIG. 4A.
  • the width of the opening 30 o is a
  • the constriction depth of the welded portion 30 w is t
  • the width of the welded portion 30 w (distance between the constrictions)
  • the retainer ring 30 is manufactured by the manufacturing process illustrated in FIGS. 5A to 5P. As shown in the drawing, the manufacturing process of the retainer ring 30 includes (a) a strip cutting process, (b) a bending process, (c) a pre-welding cleaning process, (d) a welding process, and (e) a solution.
  • Forming step (annealing step), (f) ring cutting step, (g) polishing step, (h) pre-rolling cleaning step, (i) rolling step, (j) post-rolling cleaning step, (k ) Second solution treatment step, (l) circumference adjustment step, (m) drilling step, (n) R attaching step, (o) cleaning / drying step, (p) aging / nitriding step Consists of.
  • the strip cutting step is a strip of a predetermined size by cutting a strip-shaped steel plate (maraging steel plate) having a predetermined thickness (for example, 0.4 to 0.5 mm) wound around a drum in the width direction. This is a step of cutting the plate 31.
  • the strip cutting process can be performed using a cutter or a laser cutting machine having a cutting edge.
  • a bending process is a process which shape
  • the pre-welding cleaning step is a step of degreasing and cleaning the cylindrical body 32 before welding the butted portion of the cylindrical body 32.
  • the cleaning process before welding can be performed using, for example, shower cleaning or ultrasonic cleaning.
  • the welding process is a process of performing butt welding for welding the butt portion of the cylindrical body 32.
  • the welding process can be performed using, for example, laser welding or plasma welding.
  • the first solution treatment step (annealing step) is a step for leveling the hardness distribution around the welded portion changed in the welding step and improving the spreadability.
  • the ring cutting step is a step of cutting the cylindrical body 32 into a plurality of ring bodies 33 having a predetermined width, and can be performed using a cutter cutting machine, a laser cutting machine, or the like.
  • the polishing step is a step of polishing the end portion (cut surface) in the width direction of the ring body 33 to process it into an R shape, and can be performed by barrel polishing or the like.
  • the pre-rolling cleaning step is a step of removing polishing debris and the like attached to the ring body 33 in the polishing step (barrel polishing) before rolling the ring body 33.
  • the cleaning process can be performed by, for example, shower cleaning or ultrasonic cleaning.
  • the rolling step is a step of rolling the ring body 33 to a necessary plate thickness using a rolling roller to form the ring body 34.
  • the post-rolling cleaning step is a step of removing rolling oil or the like attached to the ring body 34 by rolling.
  • the second solution forming step is a step of heating the rolled ring body 34 to recrystallize the metal structure deformed by rolling.
  • the circumferential length adjusting step is a step of adjusting the circumferential length of the rolled ring body 34 to obtain the ring body 35.
  • the circumference adjusting step for example, the ring body 34 rolled over a pair of rolls is bridged, and the pair of rolls are separated from each other, thereby adjusting the circumference of the ring body 34.
  • the drilling step is a step of forming the opening 35o in the ring body 35 having an adjusted circumference, and can be performed using, for example, the drilling device 40 illustrated in FIG.
  • the drilling device 40 is a laser processing machine that performs processing by laser, and a pair of tension rollers 41 and 42 that apply tension to the ring body 35 and a processing surface (hole drilling) of the ring body 35.
  • Clamps 43 and 44 that fix both sides of the machining surface so that the surface is parallel to the horizontal plane (XY plane), a laser oscillator (not shown), and a laser from the laser oscillator is emitted toward the machining surface of the ring body 35.
  • a drive unit (not shown) that moves the head 45 in the X and Y directions, and a recovery unit 46 that is provided on the back side of the processing surface of the ring body 35 and recovers processing waste generated by laser processing.
  • the ring body 35 is stretched over a pair of tension rollers 41, 42, and the pair of tension rollers 41, 42 are separated from each other, thereby applying tension to the ring body 35. Both sides of the processed surface of the body 35 are fixed. At this time, the fixing position of the ring body 35 is adjusted by rotating the tension rollers 41 and 42 so that the processed surface of the ring body 35 does not reach the welded portion.
  • the drilling step is not limited to the one using the above-described drilling device 40 (laser processing machine), and an electric discharge machine that performs processing by arc discharge or a water cutter that performs processing by injecting pressurized water. Alternatively, a press machine for punching can be used.
  • the R attaching step is a step of chamfering the edge of the opening 35o of the ring body 35 to form an R shape as shown in FIGS. 7A and 7B.
  • the R attaching step is performed using barrel polishing. It is also possible to use a laser processing machine that emits a laser to the edge of the opening 35o of the ring body 35 and performs chamfering.
  • the cleaning / drying process is a process of removing the processing waste adhering to the ring body 35 by the drilling process or the R attaching process and drying the ring body 35.
  • the cleaning process can be performed using, for example, shower cleaning or ultrasonic cleaning.
  • the aging / nitriding step is a step of strengthening the surface of the ring body 35 by nitriding the ring body 35 after aging treatment. Thereby, the retainer ring 30 in which the opening 30o is formed is formed.
  • the drilling step (opening forming step) for forming the opening 35o (opening 30o) in the ring body 35 (retainer ring 30) is executed after the circumferential length adjusting step. . Since there is no process involving plastic deformation of the ring body such as a rolling process or a circumferential length adjusting process after the drilling process, the dimensional accuracy of the opening can be easily ensured. As a result, the retainer ring 30 having the opening 30o can be manufactured with high quality.
  • the long hole-shaped opening is formed in the hole making step (opening forming step).
  • the present invention is not limited to this, and any shape such as a circle, an ellipse, or a polygon can be used.
  • An opening may be formed.
  • the opening 35o is formed so as not to be applied to the welded portion in the width direction of the ring body 35 in the drilling step (opening forming step), but even if a part of the opening covers the welded portion. I do not care.
  • the R attaching step (chamfering step) is performed after the drilling step (opening forming step).
  • the R attaching step may be omitted depending on the required quality.
  • the cleaning / drying process is performed after the drilling process (opening forming process), but the cleaning process may be omitted depending on the construction method (for example, water cutter) of the drilling process. .
  • the aging / nitriding step is performed as the final step. However, depending on the required quality, the aging / nitriding step may be omitted.
  • the manufacturing method of the endless ring of the present disclosure is the manufacturing method of the endless ring (30) for manufacturing the endless ring (30) used in the transmission belt (10) of the belt-type continuously variable transmission (1).
  • a welding process, a cutting process, a rolling process, and a circumferential length adjusting process are sequentially performed.
  • the opening formation process which forms an opening with respect to a ring body is performed after a circumference adjustment process.
  • the opening forming step the opening is formed at a position that does not reach the welded portion of the ring body in the width direction of the ring body.
  • a chamfering step (n) for chamfering the opening of the ring body (35) may be provided after the opening forming step (m). If it carries out like this, when tension
  • an aging / nitriding step (p) for performing an aging treatment and a nitriding treatment on the ring body (35) may be provided after the opening forming step (m).
  • the surface of the endless ring can be reinforced to further improve its quality.
  • the aging / nitriding step is performed after the chamfering step when the endless ring manufacturing method includes a chamfering step.
  • the main body portion (21) including the binding ring (12) and the saddle surface (23s) contacting the inner peripheral surface of the binding ring (12) and the saddle surface (23s).
  • the endless ring of this indication is used for the transmission belt (10) of a belt-type continuously variable transmission (1), and is formed by butting
  • the gist of the ring (30) is that an opening (30o) is formed at a position that does not reach the welded portion (30w) of the endless ring (30) in the width direction of the endless ring (30).
  • the opening is formed at a position that does not reach the welded portion of the endless ring in the width direction of the endless ring, excessive stress is applied to the welded portion or the opening when tension is applied. The action can be suppressed, and the quality of the endless ring can be improved.
  • the present invention is applicable to the endless ring manufacturing industry.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Punching Or Piercing (AREA)
  • Laser Beam Processing (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

An endless ring used for a transmission belt in a belt-type continuously variable transmission is formed by abutting ends of band-shaped metal plates against each other and welding. The endless ring is formed with an opening portion in a position away from a welded portion in the width direction of the endless ring.

Description

無端リングの製造方法および無端リングEndless ring manufacturing method and endless ring
　本明細書において開示する本開示の発明は、無端リングの製造方法および無端リングに関する。 The invention of the present disclosure disclosed in the present specification relates to an endless ring manufacturing method and an endless ring.
　従来より、ベルト式無段変速機に用いられる伝達ベルトとして、金属製の無端帯状のバンド（結束リング）と、バンドの長さ方向に沿って積層配置された多数の金属製の押しゴマ（エレメント）と、を有するものが提案されている（例えば、特許文献１参照）。各押しゴマは、ボディ部と一対のピラー部と一対の鉤状部とを備える。ボディ部は、プーリの環状Ｖ溝の両内側面に摩擦接触し得るように傾斜する２つの側方接触面を両外側面に有し、かつ、バンドを載置するためのバンド載置面を上端に有する。一対のピラー部は、ボディ部の側方接触面の延長線に沿って、ボディ部から立設されている。一対の鉤状部は、各ピラー部の先端部から内側に向かって延出されて対向して配置されている。一対の鉤状部の間には、層状に配置された複数のハンドを挿通するための開口部が形成されている。押しゴマの開口部から挿通されたバンドは、ボディ部の上端のバンド載置面に載置される。開口部の幅はバンドの幅よりも若干狭くなっており、押しゴマとバンドとを確実に係止するために、開口部よりも幅広の１枚のリテーナ（リテーナリング）がバンドの最外層の外周に配置される。リテーナの組み付けは、断面逆Ｕ字状に撓曲させてリテーナの幅を押しゴマの開口部の幅よりも狭くした状態で、当該開口部に挿通することにより行なわれる。リテーナには、撓曲させやすくして組み付け作業性を良好にするために、長孔が形成されている。
再公表特許ＷＯ２００５／０１９６８４Ａ１ Conventionally, as a transmission belt used in a belt-type continuously variable transmission, a metal endless belt-like band (binding ring) and a number of metal push sesame (elements) stacked along the length of the band ) Have been proposed (see, for example, Patent Document 1). Each push sesame includes a body part, a pair of pillar parts, and a pair of bowl-shaped parts. The body portion has two side contact surfaces that are inclined so as to be in frictional contact with both inner side surfaces of the annular V groove of the pulley on both outer side surfaces, and a band mounting surface for mounting the band. At the top. The pair of pillar portions are erected from the body portion along an extension line of the side contact surface of the body portion. A pair of hook-shaped parts are extended inward from the front-end | tip part of each pillar part, and are arrange | positioned facing each other. An opening for inserting a plurality of hands arranged in layers is formed between the pair of hook-shaped portions. The band inserted from the opening of the push sesame is placed on the band placement surface at the upper end of the body part. The width of the opening is slightly narrower than the width of the band, and a single retainer (retainer ring) wider than the opening is used as the outermost layer of the band in order to securely hold the push sesame and the band. It is arranged on the outer periphery. The retainer is assembled by bending it into an inverted U-shaped cross section and pushing the retainer in a state where the width of the retainer is made smaller than the width of the opening of the sesame, and is inserted into the opening. The retainer is formed with a long hole in order to facilitate bending and improve the assembly workability.
Republished patent WO2005 / 019684A1
　ところで、バンド（結束リング）やリテーナ（リテーナリング）などの無端リングの製造は、帯状の金属板の端部同士を突き合わせて溶接し無端の筒状体を形成する溶接工程と、筒状体を所定幅のリング体に切断する切断工程と、リング体を圧延する圧延工程と、圧延したリング体の周長を調整する周長調整工程と、を順に実行することにより行なうことができる。そして、例えば上述したようにリングの幅方向に可撓性をもたせたり軽量化したりするために、開口を有する無端リングを製造する場合、開口形成工程が更に追加される。このとき、開口形成工程をどの順序でどのように実行するのかは、高い品質を確保する上で重要な課題として認識することができる。 By the way, the manufacture of an endless ring such as a band (binding ring) or a retainer (retainer ring) includes a welding process in which end portions of a band-shaped metal plate are butted and welded to form an endless cylindrical body, and a cylindrical body. It can be performed by sequentially executing a cutting step for cutting into a ring body having a predetermined width, a rolling step for rolling the ring body, and a circumferential length adjusting step for adjusting the circumferential length of the rolled ring body. For example, in the case of manufacturing an endless ring having an opening in order to provide flexibility or weight reduction in the width direction of the ring as described above, an opening forming step is further added. At this time, in what order and how the opening forming steps are executed can be recognized as an important issue in securing high quality.
　本開示の無端リングの製造方法は、開口を有する無端リングを高い品質で製造可能とすると共に張力がかかったときに局所的に過大な応力が作用するのを抑制することを主目的とする。また、本開示の無端リングは、張力がかかったときに局所的に過大な応力が作用するのを抑制することを主目的とする。 The manufacturing method of the endless ring according to the present disclosure is mainly intended to enable an endless ring having an opening to be manufactured with high quality, and to suppress an excessive stress from acting locally when a tension is applied. Moreover, the endless ring of this indication aims at suppressing that an excessive stress acts locally when tension | tensile_strength is applied.
　本開示の無端リングの製造方法および無端リングは、上述の主目的を達成するために以下の手段を採った。 The endless ring manufacturing method and the endless ring of the present disclosure employ the following means in order to achieve the above-described main object.
　本開示の無端リングの製造方法は、ベルト式無段変速機の伝達ベルトに用いられる無端リングを製造する無端リングの製造方法であって、帯状の金属板の端部同士を突き合わせて溶接し無端の筒状体を形成する溶接工程と、前記筒状体を所定幅のリング体に切断する切断工程と、前記リング体を圧延する圧延工程と、圧延したリング体の周長を調整する周長調整工程と、周長を調整したリング体に対して、該リング体の幅方向において該リング体の溶接部にかからない位置に開口を形成する開口形成工程と、を備えることを要旨とする。 An endless ring manufacturing method according to the present disclosure is an endless ring manufacturing method for manufacturing an endless ring used for a transmission belt of a belt-type continuously variable transmission, in which end portions of a belt-shaped metal plate are butted and welded endlessly. Welding step for forming the cylindrical body, a cutting step for cutting the cylindrical body into a ring body having a predetermined width, a rolling step for rolling the ring body, and a circumferential length for adjusting the circumferential length of the rolled ring body The gist is to include an adjusting step and an opening forming step of forming an opening at a position that does not reach the welded portion of the ring body in the width direction of the ring body with respect to the ring body having an adjusted circumference.
　この本開示の無端リングの製造方法では、溶接工程と切断工程と圧延工程と周長調整工程とを順に実行する。そして、周長調整工程の後に、リング体に対して開口を形成する開口形成工程を実行する。開口形成工程は、リング体の幅方向において当該リング体の溶接部にかからない位置に開口を形成する。これにより、無端リングに張力がかかったときに、溶接部や開口部に過大な応力が作用するのを抑制することができる。また、開口形成工程の後に、圧延工程や周長調整工程などのリング体（開口）の塑性変形を伴う工程がないため、開口の寸法精度を確保し易くすることができ、開口を有する無端リングを高い品質で製造可能である。 In the manufacturing method of the endless ring according to the present disclosure, a welding process, a cutting process, a rolling process, and a circumferential length adjusting process are sequentially performed. And the opening formation process which forms an opening with respect to a ring body is performed after a circumference adjustment process. In the opening forming step, the opening is formed at a position that does not reach the welded portion of the ring body in the width direction of the ring body. Thereby, when tension | tensile_strength is applied to an endless ring, it can suppress that an excessive stress acts on a welding part and an opening part. In addition, since there is no process involving plastic deformation of the ring body (opening) such as a rolling process and a circumferential length adjusting process after the opening forming process, it is easy to ensure the dimensional accuracy of the opening, and the endless ring having the opening Can be manufactured with high quality.
　本開示の無端リングは、ベルト式無段変速機の伝達ベルトに用いられ、帯状の金属板の端部同士を突き合わせて溶接することにより形成される無端リングであって、前記無端リングの幅方向において該無端リングの溶接部にかからない位置に開口部が形成されていることを要旨とする。 An endless ring of the present disclosure is an endless ring that is used for a transmission belt of a belt-type continuously variable transmission and is formed by abutting and welding end portions of a band-shaped metal plate, and the width direction of the endless ring The gist of the present invention is that an opening is formed at a position that does not reach the welded portion of the endless ring.
　この本開示の無端リングでは、無端リングの幅方向において当該無端リングの溶接部にかからない位置に開口部が形成されているから、張力がかかったときに、溶接部や開口部に過大な応力が作用するのを抑制することができる。 In the endless ring of the present disclosure, since the opening is formed at a position that does not reach the welded portion of the endless ring in the width direction of the endless ring, excessive stress is applied to the welded portion or the opening when tension is applied. It can suppress acting.
伝達ベルト１０を有する無段変速機１の構成図である。1 is a configuration diagram of a continuously variable transmission 1 having a transmission belt 10. FIG. 伝達ベルト１０の部分断面図である。2 is a partial cross-sectional view of a transmission belt 10. FIG. リテーナリング３０の外観図である。1 is an external view of a retainer ring 30. FIG. 図４Ａは、本実施形態のリテーナリング３０の長孔３０ｏおよび溶接部３０ｗを示す説明図であり、図４Ｂは、比較例のリテーナリング１３０の長孔１３０ｏおよび溶接部１３０ｗを示す説明図である。4A is an explanatory view showing the long hole 30o and the welded portion 30w of the retainer ring 30 of the present embodiment, and FIG. 4B is an explanatory view showing the long hole 130o and the welded portion 130w of the retainer ring 130 of the comparative example. . 図５Ａ～図５Ｐは、リテーナリング３０の製造工程を示す工程図である。5A to 5P are process diagrams showing the manufacturing process of the retainer ring 30. FIG. 穴開け装置４０の構成図である。FIG. 3 is a configuration diagram of a punching device 40. 図７Ａ，図７Ｂは、Ｒ付け工程の様子を示す説明図である。7A and 7B are explanatory diagrams showing the state of the R attaching step.
　次に、図面を参照しながら、本開示の発明を実施するための形態について説明する。 Next, an embodiment for carrying out the invention of the present disclosure will be described with reference to the drawings.
　図１は、伝達ベルト１０を有する無段変速機１の構成図である。無段変速機１は、図示するように、駆動側回転軸としてのプライマリシャフト２と、プライマリシャフト２と一体に回転するプライマリプーリ３と、プライマリシャフト２と平行に配置される従動側回転軸としてのセカンダリシャフト４と、セカンダリシャフト４と一体に回転するセカンダリプーリ５と、プライマリプーリ３のプーリ溝（Ｖ字溝）とセカンダリプーリ５のプーリ溝（Ｖ字溝）とに巻き掛けられた伝達ベルト１０とを有する。プライマリシャフト２は、前後進切替機構を介してエンジン等の動力源に連結されたインプットシャフトに連結される。セカンダリシャフト４は、ギヤ機構やデファレンシャルギヤを介して駆動軸に連結される。無段変速機１は、プライマリプーリ３の溝幅やセカンダリプーリ５の溝幅を変更することにより、プライマリシャフト２に伝達されたトルクを無段階に変速してセカンダリシャフト４に出力することができる。 FIG. 1 is a configuration diagram of a continuously variable transmission 1 having a transmission belt 10. As shown in the figure, the continuously variable transmission 1 includes a primary shaft 2 as a drive side rotation shaft, a primary pulley 3 that rotates integrally with the primary shaft 2, and a driven side rotation shaft that is arranged in parallel with the primary shaft 2. Secondary shaft 4, a secondary pulley 5 that rotates integrally with the secondary shaft 4, a transmission belt wound around a pulley groove (V-shaped groove) of the primary pulley 3 and a pulley groove (V-shaped groove) of the secondary pulley 5. 10 and. The primary shaft 2 is connected to an input shaft connected to a power source such as an engine via a forward / reverse switching mechanism. The secondary shaft 4 is connected to the drive shaft via a gear mechanism or a differential gear. The continuously variable transmission 1 can change the torque transmitted to the primary shaft 2 steplessly and output it to the secondary shaft 4 by changing the groove width of the primary pulley 3 and the groove width of the secondary pulley 5. .
　図２は、伝動ベルト１０を示す部分断面図である。伝動ベルト１０は、図示するように、複数（本実施形態では９個）のリング材１１をリング径方向（厚み方向）に積層することにより構成された１個の積層リング１２と、積層リング１２の内周面に沿って環状に配列（結束）される複数（例えば、数百個）のエレメント２０と、１個のリテーナリング３０と、を有する。 FIG. 2 is a partial cross-sectional view showing the transmission belt 10. As shown in the figure, the transmission belt 10 includes a single laminated ring 12 formed by laminating a plurality of (in this embodiment, nine) ring members 11 in the ring radial direction (thickness direction), and a laminated ring 12. A plurality of (for example, several hundred) elements 20 and one retainer ring 30 arranged in a ring shape (bundled) along the inner circumferential surface of the first ring 20.
　積層リング１２を構成する複数のリング材１１は、それぞれ鋼板製のドラムから切り出された帯板がリング状に溶接されたものであり、概ね同一の厚みおよびそれぞれについて予め定められた異なる周長を有するように加工されている。 The plurality of ring members 11 constituting the laminated ring 12 are obtained by welding strips cut out from steel plate drums in a ring shape, and having substantially the same thickness and different perimeters predetermined for each. It is processed to have.
　各エレメント２０は、例えばプレス加工により鋼板から打ち抜かれたものであり、図２に示すように、図中水平に延びる本体部２１と、当該本体部２１の両端部から同方向に延出された一対のピラー部２２と、各ピラー部２２の延出側に開口するように一対のピラー部２２の間に画成されたリング収容部としての凹部２３とを有する。一対のピラー部２２は、凹部２３の底面であるサドル面２３ｓの幅方向における両側から積層リング１２の径方向における外側（積層リング１２の内周側から外周側に向かう方向、すなわち図２中上方）に延出されており、各ピラー部２２の延出端部には、サドル面２３ｓの幅方向に突出する一対のフック部２２ｆが形成されている。一対のフック部２２ｆは、積層リング１２（リング材１１）の幅よりも若干長い間隔をおいて互いに対向するように突出されている。凹部２３内には、図２に示すように、積層リング１２が配置され、凹部２３のサドル面２３ｓは、積層リング１２の内周面、すなわち最内層のリング材１１の内周面と接触している。 Each element 20 is punched from a steel plate by, for example, press working, and as shown in FIG. 2, a main body portion 21 that extends horizontally in the drawing, and extends in the same direction from both end portions of the main body portion 21. It has a pair of pillar part 22 and the recessed part 23 as a ring accommodating part defined between a pair of pillar part 22 so that it might open to the extension side of each pillar part 22. As shown in FIG. The pair of pillar portions 22 are arranged in the radial direction of the laminated ring 12 from both sides in the width direction of the saddle surface 23 s which is the bottom surface of the recessed portion 23 (in the direction from the inner circumferential side to the outer circumferential side of the laminated ring 12, that is, upper in FIG. 2). A pair of hook portions 22f projecting in the width direction of the saddle surface 23s is formed at the extending end portion of each pillar portion 22. The pair of hook portions 22f protrude so as to be opposed to each other with an interval slightly longer than the width of the laminated ring 12 (ring material 11). As shown in FIG. 2, the laminated ring 12 is disposed in the concave portion 23, and the saddle surface 23 s of the concave portion 23 is in contact with the inner peripheral surface of the laminated ring 12, that is, the inner peripheral surface of the innermost ring material 11. ing.
　リテーナリング３０は、鋼板製のドラムから切り出された帯板がリング状に溶接されたものであり、リング材１１と概ね同一若しくはそれよりも薄い厚みと、最外層のリング材１１よりも長い周長と、一対のフック部２２ｆ同士の間隔よりも長い幅とにより形成されている。このリテーナリング３０は、全てのエレメント２０の凹部２３に積層リング１２が収容された状態で、幅方向に弾性変形させられて各エレメント２０の一対のフック部２２ｆの間を介して凹部２３に嵌め込まれる。これにより、リテーナリング３０は、積層リング１２の最外層のリング材１１の外周面と各エレメント２０のフック部２２ｆの内周面との間に配置されて積層リング１２を包囲し、各エレメント２０が積層リング１２から脱落するのを規制する。本実施形態では、リテーナリング３０には、図３に示すように、開口（長穴）３０ｏが形成されており、これにより、リテーナリング３０を幅方向に弾性変形し易くしてエレメント２０の組付性を確保することができる。 The retainer ring 30 is formed by welding a strip cut out from a steel plate drum into a ring shape, and has a thickness substantially the same as or thinner than the ring material 11 and a longer circumference than the outermost ring material 11. It is formed by a length and a width longer than the interval between the pair of hook portions 22f. The retainer ring 30 is elastically deformed in the width direction in a state in which the laminated ring 12 is accommodated in the recesses 23 of all the elements 20, and is fitted into the recesses 23 between the pair of hook portions 22f of each element 20. It is. Thereby, the retainer ring 30 is disposed between the outer peripheral surface of the ring material 11 of the outermost layer of the multilayer ring 12 and the inner peripheral surface of the hook portion 22f of each element 20, and surrounds the multilayer ring 12, and each element 20 Is prevented from falling off the laminated ring 12. In the present embodiment, the retainer ring 30 is formed with an opening (long hole) 30o as shown in FIG. 3, which makes it easy to elastically deform the retainer ring 30 in the width direction. Adequacy can be secured.
　図４Ａは、本実施形態のリテーナリング３０の長孔３０ｏおよび溶接部３０ｗを示す説明図であり、図４Ｂは、比較例のリテーナリング１３０の長孔１３０ｏおよび溶接部１３０ｗを示す説明図である。リテーナリング３０，１３０は、帯板がリング状に溶接され、所望の周長まで引き延ばされて形成される。このため、溶接による影響が残存している状態で引き延ばされると、リテーナリング３０，１３０は、図４Ａ，図４Ｂに誇張して示すように、溶接部３０ｗ，１３０ｗにおいてくびれが生じる。ここで、比較例のリテーナリング１３０の開口１３０ｏは、図４Ｂに示すように、その一部が幅方向において溶接部１３０ｗにかかるように形成されている。いま、リテーナリング１３０の幅方向において、開口１３０ｏの幅をａとし、非溶接部における幅方向端部から開口１３０ｏの縁までの幅をＸとし、溶接部１３０ｗにおける幅方向端部から開口１３０ｏの縁までの幅をＸ’とし、溶接部１３０ｗのくびれの深さをｔとし、非溶接部の幅をＬとすると、溶接部１３０ｗにおける断面積減少率は、Ｘ’／Ｘで表わすことができる。ここで、Ｌを２０．５０ｍｍとし、ａを４．６ｍｍとし、ｔを０．０８ｍｍとする。Ｘ’は（Ｌ－ａ－２・ｔ）／２であり、Ｘは（Ｌ－ａ）／２であるから、断面積減少率（Ｘ’／Ｘ）は、０．９８９９となる。これに対して、本実施形態のリテーナリング３０の開口３０ｏは、図４Ａに示すように、幅方向において溶接部３０ｗにかからないように形成されている。いま、リテーナリング３０の幅方向において、開口３０ｏの幅をａとし、溶接部３０ｗのくびれの深さをｔとし、溶接部３０ｗの幅（くびれ間の距離）をＹ’とし、非溶接部の幅をＹ（＝Ｌ）とすると、溶接部３０ｗにおける断面積減少率は、Ｙ’／Ｙで表わすことができる。Ｙ’はＹ－２・ｔであるから、断面積減少率（Ｙ’／Ｙ）は、０．９９２２となる。したがって、本実施形態のリテーナリング３０の方が、比較例のリテーナリング１３０に比して、張力がかかったときに、溶接部のくびれによる影響が少ないことがわかる。 4A is an explanatory view showing the long hole 30o and the welded portion 30w of the retainer ring 30 of the present embodiment, and FIG. 4B is an explanatory view showing the long hole 130o and the welded portion 130w of the retainer ring 130 of the comparative example. . The retainer rings 30 and 130 are formed by welding strips in a ring shape and extending them to a desired peripheral length. For this reason, if the retainer rings 30 and 130 are extended in a state where the influence of welding remains, constriction occurs in the welded portions 30w and 130w as shown exaggeratedly in FIGS. 4A and 4B. Here, as shown in FIG. 4B, the opening 130 o of the retainer ring 130 of the comparative example is formed so that a part thereof covers the welded portion 130 w in the width direction. Now, in the width direction of the retainer ring 130, the width of the opening 130o is a, the width from the width direction end of the non-welded part to the edge of the opening 130o is X, and the width of the opening 130o from the width direction end of the welded part 130w. When the width to the edge is X ′, the constriction depth of the welded portion 130w is t, and the width of the non-welded portion is L, the cross-sectional area reduction rate at the welded portion 130w can be expressed by X ′ / X. . Here, L is 20.50 mm, a is 4.6 mm, and t is 0.08 mm. Since X ′ is (La−2 · t) / 2 and X is (La) / 2, the cross-sectional area reduction rate (X ′ / X) is 0.9899. On the other hand, the opening 30o of the retainer ring 30 of this embodiment is formed so as not to reach the welded portion 30w in the width direction, as shown in FIG. 4A. Now, in the width direction of the retainer ring 30, the width of the opening 30 o is a, the constriction depth of the welded portion 30 w is t, the width of the welded portion 30 w (distance between the constrictions) is Y ′, and the non-welded portion When the width is Y (= L), the cross-sectional area reduction rate in the welded portion 30w can be expressed by Y ′ / Y. Since Y ′ is Y−2 · t, the cross-sectional area reduction rate (Y ′ / Y) is 0.9922. Therefore, it can be seen that the retainer ring 30 of the present embodiment is less affected by the constriction of the welded portion when tension is applied than the retainer ring 130 of the comparative example.
　リテーナリング３０は、図５Ａ～図５Ｐに例示する製造工程によって製造される。リテーナリングリング３０の製造工程は、図示するように、（ａ）帯板切断工程と、（ｂ）曲げ工程と、（ｃ）溶接前洗浄工程と、（ｄ）溶接工程と、（ｅ）溶体化工程（焼鈍工程）と、（ｆ）リング切断工程と、（ｇ）研磨工程と、（ｈ）圧延前洗浄工程と、（ｉ）圧延工程と、（ｊ）圧延後洗浄工程と、（ｋ）第２溶体化工程と、（ｌ）周長調整工程と、（ｍ）穴開け工程と、（ｎ）Ｒ付け工程と、（ｏ）洗浄・乾燥工程と、（ｐ）時効・窒化工程とにより構成される。 The retainer ring 30 is manufactured by the manufacturing process illustrated in FIGS. 5A to 5P. As shown in the drawing, the manufacturing process of the retainer ring 30 includes (a) a strip cutting process, (b) a bending process, (c) a pre-welding cleaning process, (d) a welding process, and (e) a solution. Forming step (annealing step), (f) ring cutting step, (g) polishing step, (h) pre-rolling cleaning step, (i) rolling step, (j) post-rolling cleaning step, (k ) Second solution treatment step, (l) circumference adjustment step, (m) drilling step, (n) R attaching step, (o) cleaning / drying step, (p) aging / nitriding step Consists of.
　（ａ）帯板切断工程は、ドラムに巻回された所定厚さ（例えば、０．４～０．５ｍｍ）の帯状の鋼板（マルエージング鋼板）を幅方向に切断することにより所定サイズの帯板３１を切り出す工程である。帯板切断工程は、切れ刃を有するカッタ切断機やレーザ切断機などを用いて行なうことができる。（ｂ）曲げ工程は、帯板３１の端部同士を互いに突き合わせるように筒状に曲げて筒状体３２を成形する工程である。曲げ工程は、ロールや金型を用いて行なうことができる。 (A) The strip cutting step is a strip of a predetermined size by cutting a strip-shaped steel plate (maraging steel plate) having a predetermined thickness (for example, 0.4 to 0.5 mm) wound around a drum in the width direction. This is a step of cutting the plate 31. The strip cutting process can be performed using a cutter or a laser cutting machine having a cutting edge. (B) A bending process is a process which shape | molds the cylindrical body 32 by bending the edge part of the strip | belt board 31 so that it may mutually face | match. The bending step can be performed using a roll or a mold.
　（ｃ）溶接前洗浄工程は、筒状体３２の突き合わせ部を溶接する前に、筒状体３２の脱脂洗浄を行なう工程である。溶接前洗浄工程は、例えば、シャワー洗浄や超音波洗浄などを用いて行なうことができる。（ｄ）溶接工程は、筒状体３２の突き合わせ部を溶接する突き合わせ溶接を行なう工程である。溶接工程は、例えば、レーザ溶接やプラズマ溶接などを用いて行なうことができる。（ｅ）第１溶体化工程（焼鈍工程）は、溶接工程で変化した溶接部周辺の硬度分布を平準化させ、展延性を向上させるための工程である。 (C) The pre-welding cleaning step is a step of degreasing and cleaning the cylindrical body 32 before welding the butted portion of the cylindrical body 32. The cleaning process before welding can be performed using, for example, shower cleaning or ultrasonic cleaning. (D) The welding process is a process of performing butt welding for welding the butt portion of the cylindrical body 32. The welding process can be performed using, for example, laser welding or plasma welding. (E) The first solution treatment step (annealing step) is a step for leveling the hardness distribution around the welded portion changed in the welding step and improving the spreadability.
　（ｆ）リング切断工程は、筒状体３２を所定幅の複数のリング体３３に切断する工程であり、カッタ切断機やレーザ切断機などを用いて行なうことができる。（ｇ）研磨工程は、リング体３３の幅方向端部（切断面）を研磨してＲ状に加工する工程であり、バレル研磨などにより行なうことができる。 (F) The ring cutting step is a step of cutting the cylindrical body 32 into a plurality of ring bodies 33 having a predetermined width, and can be performed using a cutter cutting machine, a laser cutting machine, or the like. (G) The polishing step is a step of polishing the end portion (cut surface) in the width direction of the ring body 33 to process it into an R shape, and can be performed by barrel polishing or the like.
　（ｈ）圧延前洗浄工程は、リング体３３を圧延する前に、研磨工程（バレル研磨）でリング体３３に付着した研磨屑などを除去する工程である。洗浄工程は、例えば、シャワー洗浄や超音波洗浄などにより行なうことができる。（ｉ）圧延工程は、圧延ローラを用いてリング体３３を必要な板厚に圧延してリング体３４とする工程である。（ｊ）圧延後洗浄工程は、圧延によってリング体３４に付着した圧延油などを除去する工程である。（ｋ）第２溶体化工程は、圧延したリング体３４を加熱して、圧延により変形された金属組織の再結晶化を行なう工程である。 (H) The pre-rolling cleaning step is a step of removing polishing debris and the like attached to the ring body 33 in the polishing step (barrel polishing) before rolling the ring body 33. The cleaning process can be performed by, for example, shower cleaning or ultrasonic cleaning. (I) The rolling step is a step of rolling the ring body 33 to a necessary plate thickness using a rolling roller to form the ring body 34. (J) The post-rolling cleaning step is a step of removing rolling oil or the like attached to the ring body 34 by rolling. (K) The second solution forming step is a step of heating the rolled ring body 34 to recrystallize the metal structure deformed by rolling.
　（ｌ）周長調整工程は、圧延したリング体３４の周長を調整してリング体３５とする工程である。周長調整工程は、例えば、一対のロールに圧延したリング体３４を架け渡し、一対のロールを互いに離間させることによりリング体３４の周長を調整する。 (L) The circumferential length adjusting step is a step of adjusting the circumferential length of the rolled ring body 34 to obtain the ring body 35. In the circumference adjusting step, for example, the ring body 34 rolled over a pair of rolls is bridged, and the pair of rolls are separated from each other, thereby adjusting the circumference of the ring body 34.
　（ｍ）穴開け工程は、周長を調整したリング体３５に開口３５ｏを形成する工程であり、例えば、図６に例示する穴開け装置４０を用いて行なうことができる。穴開け装置４０は、図示するように、レーザにより加工を行なうレーザ加工機であり、リング体３５に対してテンションを付与する一対のテンションローラ４１，４２と、リング体３５の加工面（穴開け面）が水平面（ＸＹ平面）に平行になるよう加工面の両側を固定するクランプ４３，４４と、レーザ発振器（図示せず）、レーザ発振器からのレーザをリング体３５の加工面に向かって射出するヘッド４５と、ヘッド４５をＸＹ方向に移動させる駆動装置（図示せず）と、リング体３５の加工面の裏側に設けられレーザ加工により生じる加工屑を回収する回収部４６と、を備える。この穴開け装置４０では、リング体３５を一対のテンションローラ４１，４２に架け渡し、一対のテンションローラ４１，４２を互いに離間させることでリング体３５にテンションを付与し、クランプ４３，４４によってリング体３５の加工面の両側を固定する。このとき、リング体３５の加工面が溶接部にかからないようにテンションローラ４１，４２を回転させてリング体３５の固定位置を調整する。そして、レーザ発振器を駆動してヘッド４５からレーザを射出しながら、駆動装置によりヘッド４５をＸＹ方向に移動させることにより、リング体３５に長穴状の開口３５ｏを形成する。なお、穴開け工程は、上記穴開け装置４０（レーザ加工機）を用いるものに限られず、アーク放電により加工を行なう放電加工機や、加圧された水を射出することにより加工を行なうウォータカッタ、穴抜き加工を行なうプレス加工機などを用いることもできる。 (M) The drilling step is a step of forming the opening 35o in the ring body 35 having an adjusted circumference, and can be performed using, for example, the drilling device 40 illustrated in FIG. As shown in the figure, the drilling device 40 is a laser processing machine that performs processing by laser, and a pair of tension rollers 41 and 42 that apply tension to the ring body 35 and a processing surface (hole drilling) of the ring body 35. Clamps 43 and 44 that fix both sides of the machining surface so that the surface is parallel to the horizontal plane (XY plane), a laser oscillator (not shown), and a laser from the laser oscillator is emitted toward the machining surface of the ring body 35. And a drive unit (not shown) that moves the head 45 in the X and Y directions, and a recovery unit 46 that is provided on the back side of the processing surface of the ring body 35 and recovers processing waste generated by laser processing. In this drilling device 40, the ring body 35 is stretched over a pair of tension rollers 41, 42, and the pair of tension rollers 41, 42 are separated from each other, thereby applying tension to the ring body 35. Both sides of the processed surface of the body 35 are fixed. At this time, the fixing position of the ring body 35 is adjusted by rotating the tension rollers 41 and 42 so that the processed surface of the ring body 35 does not reach the welded portion. Then, while driving the laser oscillator to emit laser from the head 45, the head 45 is moved in the XY direction by the driving device, thereby forming an elongated hole-shaped opening 35 o in the ring body 35. The drilling step is not limited to the one using the above-described drilling device 40 (laser processing machine), and an electric discharge machine that performs processing by arc discharge or a water cutter that performs processing by injecting pressurized water. Alternatively, a press machine for punching can be used.
　（ｎ）Ｒ付け工程は、図７Ａ，図７Ｂに示すように、リング体３５の開口３５ｏの縁を面取りしてＲ状に形成する工程である。Ｒ付け工程は、本実施形態では、バレル研磨を用いて行なう。なお、リング体３５の開口３５ｏの縁にレーザを射出して面取りを行なうレーザ加工機を用いることもできる。（ｏ）洗浄・乾燥工程は、穴開け工程やＲ付け工程によってリング体３５に付着した加工屑を除去してリング体３５を乾燥させる工程である。洗浄工程は、例えば、シャワー洗浄や超音波洗浄などを用いて行なうことができる。 (N) The R attaching step is a step of chamfering the edge of the opening 35o of the ring body 35 to form an R shape as shown in FIGS. 7A and 7B. In the present embodiment, the R attaching step is performed using barrel polishing. It is also possible to use a laser processing machine that emits a laser to the edge of the opening 35o of the ring body 35 and performs chamfering. (O) The cleaning / drying process is a process of removing the processing waste adhering to the ring body 35 by the drilling process or the R attaching process and drying the ring body 35. The cleaning process can be performed using, for example, shower cleaning or ultrasonic cleaning.
　（ｐ）時効・窒化工程は、リング体３５を時効処理した後、窒化処理することによりリング体３５の表面を強化する工程である。これにより、開口３０ｏが形成されたリテーナリング３０が形成される。 (P) The aging / nitriding step is a step of strengthening the surface of the ring body 35 by nitriding the ring body 35 after aging treatment. Thereby, the retainer ring 30 in which the opening 30o is formed is formed.
　以上説明した本実施形態の無端リングの製造方法は、リング体３５（リテーナリング３０）に開口３５ｏ（開口３０ｏ）を形成する穴開け工程（開口形成工程）を、周長調整工程の後に実行する。穴開け工程の後に、圧延工程や周長調整工程などのリング体の塑性変形を伴う工程がないため、開口の寸法精度を容易に確保することができる。この結果、開口３０ｏを有するリテーナリング３０を高い品質で製造することができる。 In the endless ring manufacturing method of the present embodiment described above, the drilling step (opening forming step) for forming the opening 35o (opening 30o) in the ring body 35 (retainer ring 30) is executed after the circumferential length adjusting step. . Since there is no process involving plastic deformation of the ring body such as a rolling process or a circumferential length adjusting process after the drilling process, the dimensional accuracy of the opening can be easily ensured. As a result, the retainer ring 30 having the opening 30o can be manufactured with high quality.
　上述した実施形態では、穴開け工程（開口形成工程）において、長穴状の開口を形成するものとしたが、これに限定されるものではなく、円形や楕円形、多角形など、如何なる形状の開口を形成するものとしてもよい。 In the above-described embodiment, the long hole-shaped opening is formed in the hole making step (opening forming step). However, the present invention is not limited to this, and any shape such as a circle, an ellipse, or a polygon can be used. An opening may be formed.
　上述した実施形態では、穴開け工程（開口形成工程）において、リング体３５の幅方向において溶接部にかからないように開口３５ｏを形成するものとしたが、開口の一部が溶接部にかかっても構わない。 In the embodiment described above, the opening 35o is formed so as not to be applied to the welded portion in the width direction of the ring body 35 in the drilling step (opening forming step), but even if a part of the opening covers the welded portion. I do not care.
　上述した実施形態では、穴開け工程（開口形成工程）の後にＲ付け工程（面取り工程）を行なうものとしたが、要求される品質によっては、Ｒ付け工程を省略してもよい。 In the above-described embodiment, the R attaching step (chamfering step) is performed after the drilling step (opening forming step). However, the R attaching step may be omitted depending on the required quality.
　上述した実施形態では、穴開け工程（開口形成工程）の後に洗浄・乾燥工程を行なうものとしたが、穴開け工程の工法（例えば、ウォータカッタなど）によっては、洗浄工程を省略してもよい。 In the above-described embodiment, the cleaning / drying process is performed after the drilling process (opening forming process), but the cleaning process may be omitted depending on the construction method (for example, water cutter) of the drilling process. .
　上述した実施形態では、最終工程として時効・窒化工程を行なうものとしたが、要求される品質によっては、時効・窒化工程を省略してもよい。 In the above-described embodiment, the aging / nitriding step is performed as the final step. However, depending on the required quality, the aging / nitriding step may be omitted.
　以上説明したように、本開示の無端リングの製造方法は、ベルト式無段変速機（１）の伝達ベルト（１０）に用いられる無端リング（３０）を製造する無端リング（３０）の製造方法であって、帯状の金属板（３１）の端部同士を突き合わせて溶接し無端の筒状体（３２）を形成する溶接工程（ｄ）と、前記筒状体（３２）を所定幅のリング体（３３）に切断する切断工程（ｆ）と、前記リング体（３３）を圧延する圧延工程（ｉ）と、圧延したリング体（３４）の周長を調整する周長調整工程（ｌ）と、周長を調整したリング体（３５）に対して、該リング体（３５）の幅方向において該リング体（３５）の溶接部にかからない位置に開口（３５ｏ）を形成する開口形成工程（ｍ）と、を備えることを要旨とする。 As described above, the manufacturing method of the endless ring of the present disclosure is the manufacturing method of the endless ring (30) for manufacturing the endless ring (30) used in the transmission belt (10) of the belt-type continuously variable transmission (1). A welding step (d) in which end portions of the band-shaped metal plate (31) are butted and welded to form an endless cylindrical body (32); and the cylindrical body (32) is a ring having a predetermined width. A cutting step (f) for cutting the body (33), a rolling step (i) for rolling the ring body (33), and a circumferential length adjusting step (l) for adjusting the circumferential length of the rolled ring body (34) And an opening forming step (35o) for forming an opening (35o) at a position that does not contact the welded portion of the ring body (35) in the width direction of the ring body (35) with respect to the ring body (35) having an adjusted circumferential length ( and m).
　この本開示の無端リングの製造方法では、溶接工程と切断工程と圧延工程と周長調整工程とを順に実行する。そして、周長調整工程の後に、リング体に対して開口を形成する開口形成工程を実行する。開口形成工程は、リング体の幅方向において当該リング体の溶接部にかからない位置に開口を形成する。これにより、無端リングに張力がかかったときに、溶接部や開口部に過大な応力が作用するのを抑制することができる。また、開口形成工程の後に、圧延工程や周長調整工程などのリング体（開口）の塑性変形を伴う工程がないため、開口の寸法精度を確保し易くすることができ、開口を有する無端リングを高い品質で製造可能である。 In the manufacturing method of the endless ring according to the present disclosure, a welding process, a cutting process, a rolling process, and a circumferential length adjusting process are sequentially performed. And the opening formation process which forms an opening with respect to a ring body is performed after a circumference adjustment process. In the opening forming step, the opening is formed at a position that does not reach the welded portion of the ring body in the width direction of the ring body. Thereby, when tension | tensile_strength is applied to an endless ring, it can suppress that an excessive stress acts on a welding part and an opening part. In addition, since there is no process involving plastic deformation of the ring body (opening) such as a rolling process and a circumferential length adjusting process after the opening forming process, it is easy to ensure the dimensional accuracy of the opening, and the endless ring having the opening Can be manufactured with high quality.
　こうした本開示の無端リングの製造方法において、前記開口形成工程（ｍ）の後に、前記リング体（３５）の開口部を面取りする面取り工程（ｎ）を備えるものとしてもよい。こうすれば、無端リングに張力がかかったときに開口部に過大な応力が作用するのを抑制することができ、無端リングの品質をさらに高めることができる。 In the method of manufacturing an endless ring according to the present disclosure, a chamfering step (n) for chamfering the opening of the ring body (35) may be provided after the opening forming step (m). If it carries out like this, when tension | tensile_strength is applied to an endless ring, it can suppress that an excessive stress acts on an opening part, and can further improve the quality of an endless ring.
　また、無端リングの製造方法において、前記開口形成工程（ｍ）の後に、前記リング体（３５）に時効処理および窒化処理を施す時効・窒化工程（ｐ）を備えるものとしてもよい。こうすれば、無端リングの表面を強化してその品質を一層高めることができる。なお、時効・窒化工程は、無端リングの製造方法において面取り工程を備える場合、面取り工程の後に実行される Further, in the manufacturing method of the endless ring, an aging / nitriding step (p) for performing an aging treatment and a nitriding treatment on the ring body (35) may be provided after the opening forming step (m). In this way, the surface of the endless ring can be reinforced to further improve its quality. Note that the aging / nitriding step is performed after the chamfering step when the endless ring manufacturing method includes a chamfering step.
　また、本開示の無端リングの製造方法において、結束リング（１２）と、前記結束リング（１２）の内周面と接触するサドル面（２３ｓ）を含む本体部（２１）と前記サドル面（２３ｓ）における幅方向両側から径方向外側に延出された一対のピラー部（２２）と前記ピラー部（２２）から互いに対向するように前記サドル面（２３ｓ）の幅方向に突出する一対のフック部（２２ｆ）とを有し前記結束リング（１２）に支持されることにより環状に配列される複数のエレメント（２０）と、を備える前記伝達ベルト（１０）に用いられ、前記無端リングとして、前記結束リング（１２）の外周面と前記フック部（２２ｆ）の内周面との間に配置されるリテーナリング（３０）を製造するものとしてもよい。 Moreover, in the manufacturing method of the endless ring of the present disclosure, the main body portion (21) including the binding ring (12) and the saddle surface (23s) contacting the inner peripheral surface of the binding ring (12) and the saddle surface (23s). ) And a pair of hook portions projecting in the width direction of the saddle surface (23s) so as to be opposed to each other from the pillar portion (22). (22f) and a plurality of elements (20) arranged annularly by being supported by the binding ring (12), and as the endless ring, It is good also as what manufactures the retainer ring (30) arrange | positioned between the outer peripheral surface of a binding ring (12), and the internal peripheral surface of the said hook part (22f).
　また、本開示の無端リングは、ベルト式無段変速機（１）の伝達ベルト（１０）に用いられ、帯状の金属板（３１）の端部同士を突き合わせて溶接することにより形成される無端リング（３０）であって、前記無端リング（３０）の幅方向において該無端リング（３０）の溶接部（３０ｗ）にかからない位置に開口部（３０ｏ）が形成されていることを要旨とする。 Moreover, the endless ring of this indication is used for the transmission belt (10) of a belt-type continuously variable transmission (1), and is formed by butting | matching and welding the edge parts of a strip | belt-shaped metal plate (31). The gist of the ring (30) is that an opening (30o) is formed at a position that does not reach the welded portion (30w) of the endless ring (30) in the width direction of the endless ring (30).
　この本開示の無端リングでは、無端リングの幅方向において当該無端リングの溶接部にかからない位置に開口部が形成されているから、張力がかかったときに、溶接部や開口部に過大な応力が作用するのを抑制することができ、無端リングの品質を高めることができる。 In the endless ring of the present disclosure, since the opening is formed at a position that does not reach the welded portion of the endless ring in the width direction of the endless ring, excessive stress is applied to the welded portion or the opening when tension is applied. The action can be suppressed, and the quality of the endless ring can be improved.
　こうした本開示の無端リングにおいて、結束リング（１２）と、前記結束リング（１２）の内周面と接触するサドル面（２３ｓ）を含む本体部（２１）と前記サドル面（２３ｓ）における幅方向両側から径方向外側に延出された一対のピラー部（２２）と前記ピラー部（２２）から互いに対向するように前記サドル面（２３ｓ）の幅方向に突出する一対のフック部（２２ｆ）とを有し前記結束リング（１２）に支持されることにより環状に配列される複数のエレメント（２０）と、を備える前記伝達ベルト（１０）に用いられ、前記結束リング（１２）の外周面と前記フック部（２２ｆ）の内周面との間に配置されるリテーナリング（３０）であるものとしてもよい。 In such an endless ring of the present disclosure, the binding ring (12), the body portion (21) including the saddle surface (23s) that contacts the inner peripheral surface of the binding ring (12), and the width direction of the saddle surface (23s) A pair of pillar portions (22) extending radially outward from both sides and a pair of hook portions (22f) projecting in the width direction of the saddle surface (23s) so as to face each other from the pillar portions (22); A plurality of elements (20) arranged annularly by being supported by the binding ring (12), and an outer peripheral surface of the binding ring (12). It is good also as what is a retainer ring (30) arrange | positioned between the internal peripheral surfaces of the said hook part (22f).
　以上、本開示の発明の実施の形態について説明したが、本開示の発明はこうした実施形態に何等限定されるものではなく、本開示の発明の要旨を逸脱しない範囲内において、種々なる形態で実施し得ることは勿論である。 As mentioned above, although the embodiment of the invention of the present disclosure has been described, the invention of the present disclosure is not limited to such an embodiment and can be implemented in various forms without departing from the gist of the invention of the present disclosure. Of course you can.
　本発明は、無端リングの製造産業に利用可能である。 The present invention is applicable to the endless ring manufacturing industry.

Claims (6)

  1. 　ベルト式無段変速機の伝達ベルトに用いられ、帯状の金属板の端部同士を突き合わせて溶接することにより形成される無端リングであって、
    　前記無端リングの幅方向において該無端リングの溶接部にかからない位置に開口部が形成されている、
    　無端リング。     An endless ring that is used for a transmission belt of a belt-type continuously variable transmission and formed by abutting and welding the end portions of a belt-shaped metal plate,
    An opening is formed at a position that does not reach the welded portion of the endless ring in the width direction of the endless ring,
    Endless ring.
  2. 　請求項１に記載の無端リングであって、
    　結束リングと、前記結束リングの内周面と接触するサドル面を含む本体部と前記サドル面における幅方向両側から径方向外側に延出された一対のピラー部と前記ピラー部から互いに対向するように前記サドル面の幅方向に突出する一対のフック部とを有し前記結束リングに支持されることにより環状に配列される複数のエレメントと、を備える前記伝達ベルトに用いられ、
    　前記結束リングの外周面と前記フック部の内周面との間に配置されるリテーナリングである、
    　無端リング。     The endless ring according to claim 1,
    A bundling ring, a main body portion including a saddle surface that contacts an inner peripheral surface of the bundling ring, a pair of pillar portions extending radially outward from both sides in the width direction on the saddle surface, and the pillar portions so as to face each other And a plurality of elements arranged in an annular shape by being supported by the binding ring and having a pair of hook portions protruding in the width direction of the saddle surface.
    The retainer ring is disposed between the outer peripheral surface of the binding ring and the inner peripheral surface of the hook portion.
    Endless ring.
  3. 　ベルト式無段変速機の伝達ベルトに用いられる無端リングを製造する無端リングの製造方法であって、
    　帯状の金属板の端部同士を突き合わせて溶接し無端の筒状体を形成する溶接工程と、
    　前記筒状体を所定幅のリング体に切断する切断工程と、
    　前記リング体を圧延する圧延工程と、
    　圧延したリング体の周長を調整する周長調整工程と、
    　周長を調整したリング体に対して、該リング体の幅方向において該リング体の溶接部にかからない位置に開口を形成する開口形成工程と、
    　を備える無端リングの製造方法。     An endless ring manufacturing method for manufacturing an endless ring used for a transmission belt of a belt type continuously variable transmission,
    A welding process in which the ends of the band-shaped metal plates are butted together to form an endless tubular body;
    A cutting step of cutting the cylindrical body into a ring body having a predetermined width;
    A rolling step of rolling the ring body;
    A circumference adjustment step for adjusting the circumference of the rolled ring body,
    An opening forming step for forming an opening at a position that does not reach the welded portion of the ring body in the width direction of the ring body with respect to the ring body having an adjusted circumference;
    A method for manufacturing an endless ring.
  4. 　請求項３に記載の無端リングの製造方法であって、
    　前記開口形成工程の後に、前記リング体の開口部を面取りする面取り工程を備える、
    　無端リングの製造方法。     It is a manufacturing method of the endless ring according to claim 3,
    A chamfering step of chamfering the opening of the ring body after the opening forming step;
    A method for manufacturing an endless ring.
  5. 　請求項３または４に記載の無端リングの製造方法であって、
    　前記開口形成工程の後に、前記リング体に時効処理および窒化処理を施す時効・窒化工程を備える、
    　無端リングの製造方法。     It is a manufacturing method of the endless ring according to claim 3 or 4,
    After the opening formation step, the ring body includes an aging treatment and nitriding step for performing aging treatment and nitriding treatment,
    A method for manufacturing an endless ring.
  6. 　請求項３ないし５いずれか１項に記載の無端リングの製造方法であって、
    　前記切断工程の後であって前記圧延工程の前に、前記リング体の幅方向における端部を研磨する研磨工程を備える、
    　無端リングの製造方法。     A method for manufacturing an endless ring according to any one of claims 3 to 5,
    After the cutting step and before the rolling step, a polishing step of polishing an end portion in the width direction of the ring body is provided.
    A method for manufacturing an endless ring.
PCT/JP2018/020933 2017-06-02 2018-05-31 Endless ring manufacturing method and endless ring WO2018221645A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN114273823A (en) * 2021-12-27 2022-04-05 中建材浚鑫科技有限公司 Automatic cloth tape device of converging belt of M10 battery pack

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JP2003221871A (en) * 2002-01-31 2003-08-08 Daiwa House Ind Co Ltd Beam-column joint construction
WO2005019684A1 (en) * 2003-08-26 2005-03-03 Fukuju Kogyo Kabushiki Kaisha Metallic belt and push block used therefor
JP2007075861A (en) * 2005-09-15 2007-03-29 Daido Kogyo Co Ltd Method for machining hole on chain plate and chain
JP2012167308A (en) * 2011-02-10 2012-09-06 Toyota Motor Corp Method for manufacturing endless metal belt, and endless metal belt

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JP2003042235A (en) * 2001-07-30 2003-02-13 Fukuju Kogyo Kk Metal element, metal band, and metal belt
JP2003221871A (en) * 2002-01-31 2003-08-08 Daiwa House Ind Co Ltd Beam-column joint construction
WO2005019684A1 (en) * 2003-08-26 2005-03-03 Fukuju Kogyo Kabushiki Kaisha Metallic belt and push block used therefor
JP2007075861A (en) * 2005-09-15 2007-03-29 Daido Kogyo Co Ltd Method for machining hole on chain plate and chain
JP2012167308A (en) * 2011-02-10 2012-09-06 Toyota Motor Corp Method for manufacturing endless metal belt, and endless metal belt

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