JP6708905B2 - Vehicle wheel - Google Patents
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- JP6708905B2 JP6708905B2 JP2017020075A JP2017020075A JP6708905B2 JP 6708905 B2 JP6708905 B2 JP 6708905B2 JP 2017020075 A JP2017020075 A JP 2017020075A JP 2017020075 A JP2017020075 A JP 2017020075A JP 6708905 B2 JP6708905 B2 JP 6708905B2
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- 238000012545 processing Methods 0.000 description 23
- 238000003754 machining Methods 0.000 description 17
- 238000013461 design Methods 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000003672 processing method Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Description
本発明は、自動車などの車両にタイヤを装着する際に用いられる車両ホイールに関するものである。より詳しくは、本発明は、優れた意匠性が発揮できるような機械加工が施された車両ホイールに関するものである。 The present invention relates to a vehicle wheel used when mounting a tire on a vehicle such as an automobile. More specifically, the present invention relates to a vehicle wheel that has been machined so as to exhibit excellent designability.
従来より、タイヤを用いて走行する車両には、タイヤを装着する為の車両ホイールが用いられている。例えば、自動車の場合であれば、車体の左右両側には車両ホイールを取り付けるためのハブが車体の前後に合わせて４か所設けられている。このハブは、車軸を介してエンジンから伝達される駆動力を用いて回転可能とされており、このハブに対して上述した車両ホイールが取り付けられる。 BACKGROUND ART Conventionally, a vehicle wheel for mounting a tire has been used for a vehicle that travels using a tire. For example, in the case of an automobile, four hubs for attaching vehicle wheels are provided on the left and right sides of the vehicle body in front of and behind the vehicle body. The hub is rotatable by using the driving force transmitted from the engine via the axle, and the vehicle wheel described above is attached to the hub.
上述した車両ホイールは、例えばアルミ合金などを用いて円筒状に形成されており、タイヤが取り付けられるリム部と、車両（車体）のハブに取り付けられるセンターボア部と、センターボア部から径外側に向かって放射状に伸びてセンターボア部とリム部とを連結する複数のスポーク部と、を備えたものとなっている。
ところで、近年は、自動車のドレスアップが盛んに行われるようになっており、車両ホイールの意匠性が重要になっている。特に、車両ホイールを構成する部位の中でも、車両に装着した際に車両外側を向く車両ホイールの外表面（天面）は、「意匠面」や「デザイン面」などとも呼ばれ、車両ホイールの見栄えだけでなく、車両ホイールを装着した自動車全体の外観の善し悪しをも決定づける重要な部位となっている。
The vehicle wheel described above is formed into a cylindrical shape using, for example, an aluminum alloy, and has a rim portion to which a tire is attached, a center bore portion attached to a hub of a vehicle (vehicle body), and a radial outside from the center bore portion. A plurality of spokes that extend radially toward each other and connect the center bore portion and the rim portion are provided.
By the way, in recent years, automobiles have been actively dressed up, and the design of vehicle wheels has become important. In particular, among the parts that make up the vehicle wheel, the outer surface (top surface) of the vehicle wheel that faces the outside of the vehicle when mounted on the vehicle is also called the “design surface” or “design surface”, and the appearance of the vehicle wheel is good. Not only that, it is an important part that determines the quality of the appearance of the entire vehicle equipped with vehicle wheels.
このような意匠性に関する要望に応えるべく、従来の車両ホイールから、車両外側を向く外表面（ディスク部の表面）に様々な機械加工が施されている。このような機械加工により外表面の性状を変化させ、良好な意匠性を備えた車両ホイールを得ることができる。
例えば、特許文献１には、車両ホイールの外表面だけでなく、リム部の内外周面、ディスク部の裏面、ハブ孔内周面などの鋳肌表面に対して旋盤による機械加工を行って、平滑で光沢のある機械加工面を備えた車両用ホイールを製造する技術が開示されている。
In order to meet the demand for such designability, various machining processes have been performed on the outer surface (the surface of the disk portion) of the conventional vehicle wheel facing the vehicle outer side. By such machining, the properties of the outer surface can be changed, and a vehicle wheel with good design can be obtained.
For example, in Patent Document 1, not only the outer surface of the vehicle wheel but also the inner and outer peripheral surfaces of the rim portion, the back surface of the disc portion, the inner peripheral surface of the hub hole, and the like are machined by a lathe, Techniques for manufacturing vehicle wheels with smooth, glossy machined surfaces are disclosed.
しかしながら、車両ホイールの意匠性をより高めるためには、さまざまな加工方法を採用し、多様な加工形態を外表面に付与するのが好ましい。この点に関し、特許文献１は、スポーク部の表面を平面的に切削する旋盤加工を１種類だけ採用するに過ぎず、単調で変化に乏しい機械加工面しか備えていない。すなわち、特許文献１の技術を用いたとしても、意匠性の高い車両ホイールを製作できるか甚だ疑問である。 However, in order to further enhance the design of the vehicle wheel, it is preferable to adopt various processing methods and give various processing forms to the outer surface. In this regard, Patent Document 1 adopts only one type of lathe machining for planarly cutting the surface of the spoke portion, and has only a monotonous machined surface with little change. That is, even if the technique of Patent Document 1 is used, it is a serious question whether a vehicle wheel with high designability can be manufactured.
本発明は、上述の問題に鑑みてなされたものであり、反射光をさまざまな方向に散乱させることで、優れた意匠性を発揮可能な機械加工が複数付与された車両ホイールを提供することを目的とする。 The present invention has been made in view of the above problems, and provides a vehicle wheel provided with a plurality of machining processes capable of exhibiting excellent designability by scattering reflected light in various directions. To aim.
上記課題を解決するため、本発明の車両ホイールは以下の技術的手段を講じている。
即ち、本発明の車両ホイールは、タイヤが取り付けられるリム部と、車両のハブに取り付けられるセンターボア部と、前記センターボア部から径外側に向かって放射状に伸びて当該センターボア部とリム部とを連結する複数のスポーク部と、を備えていて、前記リム部、センターボア部、スポーク部の少なくともいずれかの外表面には、機械加工面が形成されている車両ホイールにおいて、前記機械加工面は、前記スポーク部の車両外側を向く外表面に形成された第１加工面と、互いに隣り合う前記第１加工面同士を径内側または径外側で周方向に結ぶと共に曲面状に形成された第２加工面と、を有していることを特徴とする。
In order to solve the above problems, the vehicle wheel of the present invention takes the following technical means.
That is, the vehicle wheel of the present invention includes a rim portion to which a tire is attached, a center bore portion attached to a hub of a vehicle, and a center bore portion and a rim portion that extend radially outward from the center bore portion. A plurality of spokes that connect the machined surface, and a machined surface is formed on the outer surface of at least one of the rim portion, the center bore portion, and the spoke portion. Is a first curved surface formed on the outer surface of the spoke portion facing the vehicle outer side and a first curved surface formed adjacent to each other in the circumferential direction on the radially inner side or the radially outer side. It has two processed surfaces.
好ましくは、前記第１加工面は、前記スポーク部の外表面に平面状に形成されていて、前記第２加工面は、互いに周方向に隣り合うスポーク部のうち、一方のスポーク部に形成される第１加工面から他方のスポーク部に形成される第１加工面に近づくにつれて、法線の向かう方向が連続的に変化するように曲面状に形成されているとよい。
好ましくは、前記第２加工面は、前記一方のスポーク部に形成される第１加工面の径内側の端部から、前記センターボア部の外縁に沿うように伸びて、前記他方のスポーク部に形成される第１加工面の径内側の端部に至る構成とされているとよい。
Preferably, the first processed surface is formed in a flat shape on the outer surface of the spoke portion, and the second processed surface is formed on one of the spoke portions adjacent to each other in the circumferential direction. It is preferable that the curved surface is formed so that the direction of the normal line continuously changes from the first processed surface to the first processed surface formed on the other spoke portion.
Preferably, the second machined surface extends from the radially inner end of the first machined surface formed on the one spoke portion along the outer edge of the center bore portion to the other spoke portion. It is preferable that the first processing surface is formed so as to reach the radially inner end portion.
好ましくは、前記第２加工面は、前記一方のスポーク部に形成される第１加工面の径外側の端部から、前記リム部の外縁に沿うように伸びて、前記他方のスポーク部に形成される第１加工面の径外側の端部に至る構成とされているとよい。
また、本発明に係る車両ホイールの最も好ましい形態は、タイヤが取り付けられるリム部と、車両のハブに取り付けられるセンターボア部と、前記センターボア部から径外側に向かって放射状に伸びて当該センターボア部とリム部とを連結する複数のスポーク部と、を備えていて、前記リム部、センターボア部、スポーク部の少なくともいずれかの外表面には、機械加工面が形成されている車両ホイールにおいて、前記機械加工面は、前記スポーク部の車両外側を向く外表面に形成された第１加工面と、互いに隣り合う前記第１加工面同士を少なくとも径内側で周方向に結ぶと共に曲面状に形成された第２加工面と、を有していて、前記第２加工面は、前記一方のスポーク部に形成される第１加工面の径内側の端部から、前記センターボア部の外縁に沿うように伸びて、前記他方のスポーク部に形成される第１加工面の径内側の端部に至ると共に、隣り合うスポーク部に囲まれた内側に向かって下がるように傾いた曲面形状に形成されていることを特徴とする。
さらに、本発明に係る車両ホイールの最も好ましい形態は、タイヤが取り付けられるリム部と、車両のハブに取り付けられるセンターボア部と、前記センターボア部から径外側に向かって放射状に伸びて当該センターボア部とリム部とを連結する複数のスポーク部と、を備えていて、前記リム部、センターボア部、スポーク部の少なくともいずれかの外表面には、機械加工面が形成されている車両ホイールにおいて、前記機械加工面は、前記スポーク部の車両外側を向く外表面に形成された第１加工面と、互いに隣り合う前記第１加工面同士を少なくとも径内側で周方向に結ぶと共に曲面状に形成された第２加工面と、を有していて、前記第２加工面は、前記一方のスポーク部に形成される第１加工面の径外側の端部から、前記リム部の外縁に沿うように伸びて、前記他方のスポーク部に形成される第１加工面の径外側の端部に至ると共に、隣り合うスポーク部に囲まれた内側に向かって下がるように傾いた曲面形状に形成されていることを特徴とする。
Preferably, the second processed surface extends along the outer edge of the rim portion from the radially outer end of the first processed surface formed on the one spoke portion, and is formed on the other spoke portion. It is preferable that the first processed surface reaches a radially outer end of the processed surface.
The most preferable form of the vehicle wheel according to the present invention is a rim portion to which a tire is attached, a center bore portion attached to a hub of a vehicle, and a center bore portion that extends radially outward from the center bore portion. A plurality of spoke portions connecting the rim portion and the rim portion, and a vehicle wheel having a machined surface formed on the outer surface of at least one of the rim portion, the center bore portion, and the spoke portion. The machined surface is formed into a curved surface while connecting at least a radially inner side of the first processed surface formed on an outer surface of the spoke portion facing the vehicle outer side and at least the first processed surfaces adjacent to each other in the circumferential direction. The second processed surface is formed along the outer edge of the center bore portion from the radially inner end of the first processed surface formed on the one spoke portion. Is formed so as to extend to the radially inner end of the first processed surface formed on the other spoke portion, and to be curved so as to descend toward the inside surrounded by the adjacent spoke portions. It is characterized by
Further, the most preferable form of the vehicle wheel according to the present invention is a rim portion to which a tire is attached, a center bore portion attached to a hub of a vehicle, and a center bore portion that extends radially outward from the center bore portion. A plurality of spoke portions connecting the rim portion and the rim portion, and a vehicle wheel having a machined surface formed on the outer surface of at least one of the rim portion, the center bore portion, and the spoke portion. The machined surface is formed into a curved surface while connecting at least a radially inner side of the first processed surface formed on an outer surface of the spoke portion facing the vehicle outer side and at least the first processed surfaces adjacent to each other in the circumferential direction. And a second processed surface formed so as to extend along the outer edge of the rim portion from the radially outer end of the first processed surface formed on the one spoke portion. To a radially outer end portion of the first processed surface formed on the other spoke portion, and is formed in a curved surface shape inclined downward toward the inner side surrounded by the adjacent spoke portions. It is characterized by being
本発明によれば、優れた意匠性を発揮可能な機械加工が外表面に付与された車両ホイールを提供することが可能となる。 ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the vehicle wheel with which the outer surface was provided with the mechanical processing which can exhibit the outstanding designability.
以下、本発明の車両ホイール１の実施形態を、図面に基づき詳しく説明する。
図１は、本実施形態の車両ホイール１を模式的に示したものである。
図１に示すように、本発明の車両ホイール１は、自動車などの車両に対して取り付け可能とされていて、タイヤを嵌め込んで装着するために用いられる部材である。具体的には、本実施形態の車両ホイール１は、自動車の車体の側部に設けられるハブに、装着可能とされている。また、車両ホイール１は、使用するタイヤを装着可能な外径を備えた略円筒形状の部材とされていて、外周側にタイヤを外嵌状態で装着可能となっている。
Hereinafter, an embodiment of a vehicle wheel 1 of the present invention will be described in detail with reference to the drawings.
FIG. 1 schematically shows a vehicle wheel 1 of this embodiment.
As shown in FIG. 1, a vehicle wheel 1 of the present invention is a member that can be attached to a vehicle such as an automobile and is used for fitting and mounting a tire. Specifically, the vehicle wheel 1 of the present embodiment can be mounted on a hub provided on a side portion of a vehicle body of an automobile. Further, the vehicle wheel 1 is a substantially cylindrical member having an outer diameter capable of mounting the tire to be used, and the tire can be mounted on the outer peripheral side in an externally fitted state.
さらに、本実施形態の車両ホイール１は、アルミやマグネシウムなどの軽合金（またはスチール）などで形成されており、鋳造や鍛造などの加工法により上述した略円筒形に成型されている。
具体的には、本実施形態の車両ホイール１は、タイヤが取り付けられるリム部２と、車両のハブに取り付けられるセンターボア部３と、センターボア部３から径外側に向かって放射状に伸びて当該センターボア部３とリム部２とを連結する複数のスポーク部４と、を備えている。
Furthermore, the vehicle wheel 1 of the present embodiment is formed of a light alloy (or steel) such as aluminum or magnesium, and is formed into the above-described substantially cylindrical shape by a processing method such as casting or forging.
Specifically, the vehicle wheel 1 of the present embodiment includes a rim portion 2 to which a tire is attached, a center bore portion 3 attached to a hub of a vehicle, and a radial extension from the center bore portion 3 toward the radially outer side. A plurality of spoke portions 4 that connect the center bore portion 3 and the rim portion 2 are provided.
以降では、まず車両ホイール１の全体的な構成について説明する。
なお、以降の説明において、図１に矢印で示した方向を車両ホイール１での幅方向と呼ぶ。また、図２、図３に示すように車両ホイール１の中央に設けられたセンターボア部３を基準として、センターボア部３に近接したり離間したりする方向を径方向と呼ぶ。さらに、センターボア部３を基準として、センターボア部３の周りを周回する方向を周方向と呼ぶ。
Hereinafter, first, the overall configuration of the vehicle wheel 1 will be described.
In the following description, the direction indicated by the arrow in FIG. 1 is called the width direction of the vehicle wheel 1. Further, as shown in FIG. 2 and FIG. 3, with the center bore portion 3 provided at the center of the vehicle wheel 1 as a reference, the direction in which the center bore portion 3 approaches or separates from it is called the radial direction. Further, a direction that goes around the center bore portion 3 with the center bore portion 3 as a reference is referred to as a circumferential direction.
リム部２は、上述した金属などを用いて、短幅尺な円筒形に形成された部分であり、車両ホイール１の外周側に配備されている。このリム部２は、装着しようとするタイヤの内径に対応した外径を備えており、またその幅はタイヤの横幅に対応したものとなっている。そして、リム部２の幅方向の両側には、径外側に向かって突出したフランジ部２ａが形成されていて、装着されたタイヤがリム部２から脱離することを抑制している。 The rim portion 2 is a portion formed in a short width cylindrical shape using the above-mentioned metal or the like, and is arranged on the outer peripheral side of the vehicle wheel 1. The rim portion 2 has an outer diameter corresponding to the inner diameter of the tire to be mounted, and the width thereof corresponds to the lateral width of the tire. Then, on both sides in the width direction of the rim portion 2, flange portions 2a protruding outward in the radial direction are formed to suppress detachment of the mounted tire from the rim portion 2.
センターボア部３は、車両のハブに車両ホイール１を固定するための部分であり、上述したリム部２の内周側、言い換えれば、車両ホイール１の中央側に設けられている。具体的には、センターボア部３には、上述したハブに設けられるホイール固定用のボルトを挿通する為のボルト孔５が設けられている。このボルト孔５は、周方向に等間隔に複数（本実施形態の場合は５穴）形成されている。なお、本実施形態のセンターボア部３は、５本のボルトに対応して車両外側から見た場合に放射状略五角形に形成されているが、ボルトの本数が変化すればセンターボア部３の形状も他の多角形に変化する。さらに、上述したセンターボア部３は、センターボア部３の中心と車両のハブの中心とが一致するように取り付けられ、センターボア部３の中心を通る回転軸心回りに車両ホイール１が回転する構成となっている。 The center bore portion 3 is a portion for fixing the vehicle wheel 1 to the hub of the vehicle, and is provided on the inner peripheral side of the rim portion 2 described above, in other words, on the center side of the vehicle wheel 1. Specifically, the center bore portion 3 is provided with a bolt hole 5 for inserting a wheel fixing bolt provided on the hub described above. A plurality of bolt holes 5 (five holes in the case of the present embodiment) are formed at equal intervals in the circumferential direction. The center bore portion 3 of the present embodiment is formed in a substantially pentagonal shape when viewed from the outside of the vehicle corresponding to the five bolts, but if the number of bolts changes, the shape of the center bore portion 3 changes. Also changes to another polygon. Further, the above-described center bore portion 3 is attached so that the center of the center bore portion 3 and the center of the hub of the vehicle coincide with each other, and the vehicle wheel 1 rotates about the rotation axis passing through the center of the center bore portion 3. It is composed.
スポーク部４は、センターボア部３の外周から径外側に向かって放射状に伸びる長尺な部材であり、センターボア部３とリム部２とを連結している。なお、本実施形態の車両ホイール１は、上述したセンターボア部３の略五角形の頂点に相当する部分から、径外側に向かって二股状に分岐しつつ伸びる１０本のスポーク部４を備えている。つまり、本実施形態の車両ホイール１は、２本のスポーク部４を１組とした場合、全部で５組、１０本のスポーク部４を備えたものとなっている。 The spokes 4 are long members that radially extend from the outer circumference of the center bore 3 toward the radially outer side, and connect the center bore 3 and the rim 2 to each other. The vehicle wheel 1 of the present embodiment is provided with ten spoke portions 4 extending from the portion corresponding to the apex of the above-described center bore portion 3 having a substantially pentagonal shape while bifurcating outward in the radial direction. .. In other words, the vehicle wheel 1 of the present embodiment is provided with a total of 5 sets and 10 spokes 4 when the set of the two spokes 4 is one set.
なお、各組を構成する２本のスポーク部４は、上述した回転軸心からセンターボア部３の略五角形の頂点を通って伸びる線分に対して線対象とされており、車両外側から見た場合に２本のスポーク部４がちょうどＶ字状あるいはＵ字状に交わるように配備されている。
図２に示すように、本実施形態の車両ホイール１は、上述したスポーク部４のそれぞれに、鋳肌の表面（あるいは鍛造上がりの表面）に対して機械加工を行って表面が平滑化された機械加工面６が形成されている。この機械加工面６は、車両ホイール１を車両のハブに取り付けた際に、車両外側（車両とは反対側）を向くスポーク部４の外表面に形成されており、平滑化された表面で金属光沢を目立たせることで、車両ホイール１に優れた意匠性を付与可能とされている。
The two spokes 4 forming each set are line-symmetrical with respect to the line segment extending from the above-described rotation axis through the apex of the substantially pentagon of the center bore portion 3 and viewed from the outside of the vehicle. In this case, the two spokes 4 are arranged so as to intersect each other in a V shape or a U shape.
As shown in FIG. 2, in the vehicle wheel 1 of the present embodiment, the surface of the casting surface (or the surface of the forged product) is machined on each of the spokes 4 described above and the surface is smoothed. A machined surface 6 is formed. This machined surface 6 is formed on the outer surface of the spoke portion 4 facing the vehicle outer side (the side opposite to the vehicle) when the vehicle wheel 1 is attached to the hub of the vehicle, and has a smoothed surface and is made of metal. By making the gloss stand out, it is possible to give the vehicle wheel 1 excellent design.
具体的には、本実施形態の車両ホイール１に形成される機械加工面６には、スポーク部４の車両外側を向く外表面に形成された第１加工面７と、互いに隣り合う第１加工面７同士を径内側または径外側で周方向に結ぶ曲面状の第２加工面８と、がある。そして、本発明の車両ホイール１は、第１加工面７に加えて、第１加工面７より意匠性が高い第２加工面８を有することを特徴とするものである。 Specifically, on the machined surface 6 formed on the vehicle wheel 1 of the present embodiment, the first processed surface 7 formed on the outer surface of the spoke portion 4 facing the vehicle outer side and the first processed surface adjacent to each other. There is a curved second processing surface 8 that connects the surfaces 7 to each other in the circumferential direction on the radially inner side or the radially outer side. The vehicle wheel 1 of the present invention is characterized in that, in addition to the first machined surface 7, it has a second machined surface 8 having a design property higher than that of the first machined surface 7.
以降では、本実施形態の車両ホイール１の機械加工面６に設けられる第１加工面７及び第２加工面８について説明する。
第１加工面７は、車両外側を向くスポーク部４の外表面に形成された機械加工面６のうち、２次元的な加工、つまり平面状の加工が施された部分である。本実施形態の場合、第１加工面７は機械加工面６の中でも径外側に形成されている。より詳しくは、第１加工面７は、スポーク部４の径外側の端部から、径方向の中途側までの範囲に形成されている。
Hereinafter, the first processed surface 7 and the second processed surface 8 provided on the machined surface 6 of the vehicle wheel 1 of the present embodiment will be described.
The first machined surface 7 is a part of the machined surface 6 formed on the outer surface of the spoke portion 4 facing the vehicle outer side, which has been subjected to two-dimensional processing, that is, planar processing. In the case of this embodiment, the first machined surface 7 is formed on the radially outer side of the machined surface 6. More specifically, the first processed surface 7 is formed in the range from the radially outer end of the spoke portion 4 to the midway side in the radial direction.
この第１加工面７は、後述する第２加工面８が曲面状とされているのに比して、車両外側に面を向けた平面状（２次元面状）に形成されており、フライス盤、旋盤を用いた加工（以降では、ＤＣ加工と呼ぶ）により形成されている。つまり、第１加工面７は、機械加工の中でも、旋盤やフライスのような加工速度が大きく製造コストもかからないようなＤＣ加工で加工されたものとなっている。 The first machined surface 7 is formed in a planar shape (two-dimensional surface shape) with the surface facing the outside of the vehicle, as compared with a second machined surface 8 which will be described later having a curved surface, and the milling machine. , Is formed by machining using a lathe (hereinafter referred to as DC machining). That is, the first machined surface 7 is machined by DC machining, such as lathe and milling, which has a high machining speed and does not require a manufacturing cost.
例えば、本実施形態の場合であれば、この第１加工面７は、互いに径方向に対する傾きが異なる径内面と径外面との２つの加工面を組み合わせたものとなっている。これら２つの加工面のうち、径内側の加工面は、車両ホイール１の回転軸を基準とした場合に、径内側に向かって法線をやや傾斜させるように傾いた平面とされている。また、径外側の加工面は、同じように回転軸を基準とした場合に、径外側に向かって法線をやや傾斜させるように傾いた平面とされている。つまり、本実施形態の第１加工面７は、径内側と径外側とで傾斜方向が若干異なるような平面を備えた構成となっている。 For example, in the case of the present embodiment, the first machined surface 7 is a combination of two machined surfaces, namely, a radially inner surface and a radially outer surface having different inclinations with respect to the radial direction. Of these two machining surfaces, the machining surface on the radially inner side is a plane inclined so that the normal line is slightly inclined toward the radially inner side when the rotation axis of the vehicle wheel 1 is used as a reference. Similarly, the processing surface on the radially outer side is a plane inclined so that the normal line is slightly inclined toward the radially outer side when the rotation axis is used as a reference. That is, the first machined surface 7 of the present embodiment has a configuration in which the radially inner side and the radially outer side are provided with planes in which the inclination directions are slightly different.
上述した第１加工面７に対して、第２加工面８は、互いに周方向に隣り合うスポーク部４（上述した各組を構成する２本のスポーク部４）に対して、一方のスポーク部４の第１加工面７と、もう一方のスポーク部４の第１加工面７とを、径内側または径外側において周方向に結ぶように形成されている。そして、この第２加工面８は、第１加工面７に比べて反射光の散乱性が高くなるように曲面状、つまり３次元的な加工面を備えたものとされている。 In contrast to the above-described first processed surface 7, the second processed surface 8 is one spoke part with respect to the spoke parts 4 (two spoke parts 4 constituting each set described above) that are circumferentially adjacent to each other. The first processed surface 7 of No. 4 and the first processed surface 7 of the other spoke portion 4 are formed so as to be connected in the circumferential direction on the radially inner side or the radially outer side. The second processed surface 8 is provided with a curved surface, that is, a three-dimensional processed surface so that the scattering property of reflected light is higher than that of the first processed surface 7.
具体的には、本実施形態の第２加工面８は、上述した１組のスポーク部４のうち、一方のスポーク部４に形成される第１加工面７の径内側の端部からさらに径内側に向かって伸び、その後センターボア部３の外縁に沿うように周方向に進んで、最後に径外側に向かって伸びて他方のスポーク部４に形成される第１加工面７の径内側の端部に至るように形成されている。言い換えれば、車両外側から車両ホイール１を見た場合に、第２加工面８は、径内側に向かって円弧を描くように形成されたものとなっており、第１加工面７の径内側の端部同士を連続して連結するものとなっている。 Specifically, the second machined surface 8 of the present embodiment has a diameter further from the inner diameter end of the first machined surface 7 formed on one of the spokes 4 of the above-described set of spokes 4. It extends toward the inside, then advances in the circumferential direction along the outer edge of the center bore portion 3, and finally extends toward the outside in the radial direction to extend toward the outside in the inside of the first processed surface 7 formed in the other spoke portion 4. It is formed to reach the end. In other words, when the vehicle wheel 1 is viewed from the outside of the vehicle, the second processed surface 8 is formed so as to draw an arc toward the radially inner side. The ends are continuously connected.
また、第２加工面８は、一方のスポーク部４に形成される第１加工面７の径内側から、もう一方のスポーク部４に形成される第１加工面７の径内側に向かうに連れて、面上の各点で傾きが漸次変化するような曲面状に形成されている。例えば、図２のＢ−Ｂ線及びＣ―Ｃ線で切断したスポーク部４の断面形状を図４（ａ）、図４（ｂ）に示す。
図４（ａ）に示される第１加工面７は、回転軸と直交するような平面状に形成されている。このような第１加工面７に対し、図４（ｂ）に示される第２加工面８は、第１加工面７に対して４５°の角度で傾斜しており、第１加工面７と異なる方向に光を反射可能であることがわかる。
The second machined surface 8 moves from the radially inner side of the first machined surface 7 formed on one spoke portion 4 toward the radially inner side of the first machined surface 7 formed on the other spoke portion 4. And, it is formed in a curved surface shape in which the inclination gradually changes at each point on the surface. For example, the cross-sectional shape of the spoke portion 4 taken along the line BB and the line CC in FIG. 2 is shown in FIGS. 4(a) and 4(b).
The first processed surface 7 shown in FIG. 4A is formed in a plane shape orthogonal to the rotation axis. The second processing surface 8 shown in FIG. 4B is inclined with respect to the first processing surface 7 at an angle of 45° with respect to the first processing surface 7, and It can be seen that light can be reflected in different directions.
なお、図２のＣ―Ｃ線の箇所で切断した場合であれば、第２加工面８の傾斜方向は、ちょうどスポーク部４を横切る方向（周方向）に沿ったものとなる。しかし、上述したように第２加工面８は、径内側に向かって円弧を描くように湾曲し、センターボア部３の外縁に沿うように曲がっている。そのため、車両ホイール１の回転軸心に最も近づいた箇所で第２加工面８を切断した場合には、第２加工面８の傾斜方向は、ちょうど径方向に沿ったものとなる。つまり、第２加工面８の傾斜方向は、面上の各位置で傾斜方向が変化する構成となっており、光をさまざまな方向に反射可能となっている。 In the case of cutting along the line C--C in FIG. 2, the inclination direction of the second processed surface 8 is exactly along the direction (circumferential direction) that traverses the spoke portion 4. However, as described above, the second processed surface 8 is curved so as to draw an arc toward the radially inner side, and is curved so as to follow the outer edge of the center bore portion 3. Therefore, when the second processed surface 8 is cut at the position closest to the rotation axis of the vehicle wheel 1, the inclination direction of the second processed surface 8 is exactly along the radial direction. That is, the inclination direction of the second processed surface 8 is changed at each position on the surface, and the light can be reflected in various directions.
言い換えれば、上述した第２加工面８は、自動車の高速テストコースの周回部分に設けられるバンクのように、２つのスポーク部４に囲まれた内側に向かって下がるように傾いた「すり鉢形状」を有するものとされている。このような曲面状に第２加工面８を形成すれば、上述した１組のスポーク部４のうち、一方のスポーク部４に形成される第１加工面７から他方のスポーク部４に形成される第１加工面７に近づくにつれて、面上のある点の法線が連続的に変化し、反射光をさまざまな方向に向かって散乱することが可能となる為、ＤＣ加工された第１加工面７よりも意匠性に優れた機械加工面６を形成することが可能となる。 In other words, the above-mentioned second processed surface 8 is a "mortar shape" inclined downward toward the inside surrounded by the two spoke portions 4, like a bank provided in the orbiting portion of the high speed test course of an automobile. Is said to have. If the second processed surface 8 is formed in such a curved surface, it is formed from the first processed surface 7 formed on one spoke portion 4 to the other spoke portion 4 of the one set of spoke portions 4 described above. As the normal line of a certain point on the surface changes continuously as it approaches the first processed surface 7, the reflected light can be scattered in various directions. Therefore, the DC processed first processing is possible. It is possible to form the machined surface 6 that is more excellent in design than the surface 7.
上述した第２加工面８は、第１加工面７のような２次元的な平面ではなく、３次元的な曲であるため、切削工具の工具回転軸の傾斜方向を変更可能な切削方法、例えばマシニングセンタによる加工（以降、ＭＣ加工という場合がある）を用いることで形成することができる。
次に、第１加工面７及び第２加工面８を実際に加工する加工方法について説明する。
Since the above-described second machining surface 8 is not a two-dimensional plane like the first machining surface 7 but a three-dimensional curve, a cutting method capable of changing the inclination direction of the tool rotation axis of the cutting tool, For example, it can be formed by using processing by a machining center (hereinafter sometimes referred to as MC processing).
Next, a processing method for actually processing the first processed surface 7 and the second processed surface 8 will be described.
例えば、ＤＣ加工として、旋盤を用いて第１加工面７を加工する場合には、鍛造や鋳造上がりの車両ホイール１を装置に取り付け、センターボア部３の中央を貫通する回転軸芯回りに車両ホイール１を回転させる。そして、回転する車両ホイール１の外表面の外方から切削工具を近接・接触させる。そうすると、切削工具によりスポーク部４の外表面が２次元的に切削され、車両外側に法線を向けた平面状の第１加工面７を形成することができる。 For example, in the case of machining the first machined surface 7 by using a lathe as the DC machining, the vehicle wheel 1 after forging or casting is attached to the device and the vehicle is rotated around the axis of the rotary shaft passing through the center of the center bore portion 3. Rotate wheel 1. Then, the cutting tool is brought into close contact with the outer surface of the rotating vehicle wheel 1 from outside. Then, the outer surface of the spoke portion 4 is two-dimensionally cut by the cutting tool, and the planar first processed surface 7 with the normal line facing the outside of the vehicle can be formed.
一方、第２加工面８を加工する場合には、ＭＣ加工を行い、各組を構成する２本のスポーク部４のうち、一方のスポーク部４の第１加工面７の径内側端部を始点として加工を行う。そして、最初は、スポーク部４が形成される方向（径方向）に沿って径内側に向かって工具を移動させつつ切削を行う。そして、センターボア部３の外縁に達した後は、センターボア部３の外縁に沿うように加工工具を周方向に移動させる。２本のスポーク部４のうち、もう一方のスポーク部４の径内側端部に到達したら、径外側に向かって工具を進め、もう一方のスポーク部４の径内側の端部まで切削加工を行う。このようにすれば、車両外側から見た場合に、径内側に向かって膨らむ円弧状の曲面を備えた第２加工面８を形成することが可能となり、第２加工面８の反射光をさまざまな方向に向かって散乱して機械加工面６の意匠性をさらに高めることが可能となる。 On the other hand, when the second processed surface 8 is processed, MC processing is performed so that the radially inner end of the first processed surface 7 of one of the two spoke parts 4 constituting each set is processed. Processing is performed as a starting point. Then, initially, cutting is performed while moving the tool radially inward along the direction (radial direction) in which the spokes 4 are formed. Then, after reaching the outer edge of the center bore portion 3, the processing tool is moved in the circumferential direction along the outer edge of the center bore portion 3. When reaching the radially inner end of the other spoke 4 out of the two spokes 4, the tool is advanced toward the radially outer side, and cutting is performed to the radially inner end of the other spoke 4. .. With this configuration, when viewed from the outside of the vehicle, it is possible to form the second processed surface 8 having an arcuate curved surface that bulges toward the inner diameter, and the reflected light from the second processed surface 8 can be varied. It becomes possible to further improve the designability of the machined surface 6 by scattering in various directions.
このように、本発明の車両ホイール１は、上述したＤＣ加工による第１加工面７と、ＭＣ加工による第２加工面８とを組み合わせたものとなっている。このように２つの加工方法を用いる理由は、ＤＣ加工に比べて加工速度が遅く、製造コストも高いＭＣ加工を行う範囲を必要最小限に留めることで、製造コストの低減と、加工形態が異なる複数の加工方法の選択とを両立させ、更には意匠性を高めるためである。 As described above, the vehicle wheel 1 of the present invention is a combination of the first processing surface 7 by the DC processing and the second processing surface 8 by the MC processing described above. The reason for using two processing methods in this way is that the processing speed is slower than DC processing and the manufacturing cost is high. This is because both the selection of a plurality of processing methods are compatible with each other and the designability is further enhanced.
なお、今回開示された実施形態はすべての点で例示であって制限的なものではないと考えられるべきである。
例えば、上述した実施形態では、互いに周方向に隣接したスポーク部４の第１加工面７の径内側同士を円弧状に結ぶような第２加工面８を形成した。しかし、本発明の車両ホイール１の第２加工面８は、互いに周方向に隣接したスポーク部４の第１加工面７の径外側同士を結ぶものであっても良い。この場合は、第２加工面８はリム部２の外縁に沿うように湾曲したものとなり、径外側に向かって円弧を描くように湾曲したものとなる。このような径外側に向かって湾曲した第２加工面８であっても、反射光をさまざまな方向に向かって散乱することができ、機械加工面６の意匠性を第１加工面７よりもさらに高めることが可能となる。
It should be considered that the embodiments disclosed this time are exemplifications in all points and not restrictive.
For example, in the above-described embodiment, the second processed surface 8 is formed such that the radially inner sides of the first processed surfaces 7 of the spoke portions 4 adjacent to each other in the circumferential direction are connected in an arc shape. However, the second processed surface 8 of the vehicle wheel 1 of the present invention may connect the radially outer sides of the first processed surfaces 7 of the spoke portions 4 that are circumferentially adjacent to each other. In this case, the second processed surface 8 is curved along the outer edge of the rim portion 2, and is curved so as to draw an arc toward the radially outer side. Even with the second processed surface 8 curved outward in the radial direction, the reflected light can be scattered in various directions, and the design of the machined surface 6 is better than that of the first processed surface 7. It is possible to further increase.
以上、今回開示された実施形態において、明示的に開示されていない事項、例えば、運転条件、各種パラメータ、構成物の寸法、重量、体積などは、当業者が通常実施する範囲を逸脱するものではなく、通常の当業者であれば、容易に想定することが可能な値を採用している。 As described above, in the embodiments disclosed this time, matters not explicitly disclosed, such as operating conditions, various parameters, dimensions, weights, and volumes of components, do not deviate from the scope normally performed by those skilled in the art. Instead, a person having ordinary skill in the art has adopted a value that can be easily assumed.
１ 車両ホイール
２ リム部
２ａ フランジ部
３ センターボア部
４ スポーク部
５ ボルト孔
６ 機械加工面
７ 第１加工面
８ 第２加工面
1 Vehicle Wheel 2 Rim Part 2a Flange Part 3 Center Bore Part 4 Spoke Part 5 Bolt Hole 6 Machining Surface 7 First Machining Surface 8 Second Machining Surface
Claims (3)
前記機械加工面は、前記スポーク部の車両外側を向く外表面に形成された第１加工面と、互いに隣り合う前記第１加工面同士を少なくとも径内側で周方向に結ぶと共に曲面状に形成された第２加工面と、
を有していて、
前記第２加工面は、
前記一方のスポーク部に形成される第１加工面の径内側の端部から、前記センターボア部の外縁に沿うように伸びて、前記他方のスポーク部に形成される第１加工面の径内側の端部に至ると共に、隣り合うスポーク部に囲まれた内側に向かって下がるように傾いた曲面形状に形成されている
ことを特徴とする車両ホイール。 A rim portion to which the tire is attached, a center bore portion attached to the hub of the vehicle, and a plurality of spoke portions that extend radially outward from the center bore portion and connect the center bore portion and the rim portion, In the vehicle wheel having a machined surface formed on at least one outer surface of the rim portion, the center bore portion, and the spoke portion,
The machined surface is formed in a curved shape while connecting at least a radially inner side of the first processed surface formed on the outer surface of the spoke portion facing the vehicle outer side and at least the first processed surfaces adjacent to each other in the circumferential direction. The second processed surface,
Has
The second processed surface is
A radially inner side of the first machined surface formed on the other spoke portion extending from the radially inner side edge of the first machined surface formed on the one spoke portion along the outer edge of the center bore portion. The vehicle wheel is characterized in that it is formed into a curved surface that is inclined toward the inner end surrounded by the adjacent spokes as it goes to the end.
前記機械加工面は、前記スポーク部の車両外側を向く外表面に形成された第１加工面と、互いに隣り合う前記第１加工面同士を少なくとも径内側で周方向に結ぶと共に曲面状に形成された第２加工面と、
を有していて、
前記第２加工面は、
前記一方のスポーク部に形成される第１加工面の径外側の端部から、前記リム部の外縁に沿うように伸びて、前記他方のスポーク部に形成される第１加工面の径外側の端部に至ると共に、隣り合うスポーク部に囲まれた内側に向かって下がるように傾いた曲面形状に
形成されている
ことを特徴とする車両ホイール。 A rim portion to which the tire is attached, a center bore portion attached to the hub of the vehicle, and a plurality of spoke portions that extend radially outward from the center bore portion and connect the center bore portion and the rim portion, In the vehicle wheel having a machined surface on the outer surface of at least one of the rim portion, the center bore portion, and the spoke portion,
The machined surface is formed in a curved shape while connecting at least a radially inner side of the first processed surface formed on the outer surface of the spoke portion facing the vehicle outer side and at least the first processed surfaces adjacent to each other in the circumferential direction. The second processed surface,
Has
The second processed surface is
From the radially outer end of the first machined surface formed on the one spoke portion, along the outer edge of the rim portion, the radially outer side of the first machined surface formed on the other spoke portion. A vehicle wheel characterized in that it is formed into a curved surface that is inclined so as to reach the ends and fall inwardly surrounded by the adjacent spokes.
前記第２加工面は、互いに周方向に隣り合うスポーク部のうち、一方のスポーク部に形成される第１加工面から他方のスポーク部に形成される第１加工面に近づくにつれて、法線の向かう方向が連続的に変化するように曲面状に形成されている
ことを特徴とする請求項１または２に記載の車両ホイール。 The first processed surface is formed in a flat shape on the outer surface of the spoke portion,
Of the spoke portions that are adjacent to each other in the circumferential direction, the second processed surface has a normal line that is closer to the first processed surface formed on the other spoke portion from the first processed surface formed on the other spoke portion. The vehicle wheel according to claim 1 or 2, wherein the vehicle wheel is formed into a curved surface so that the direction toward which it continuously changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017020075A JP6708905B2 (en) | 2017-02-07 | 2017-02-07 | Vehicle wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017020075A JP6708905B2 (en) | 2017-02-07 | 2017-02-07 | Vehicle wheel |
Publications (2)
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