JP4848673B2 - Manufacturing method of driven wheel hub unit - Google Patents

Manufacturing method of driven wheel hub unit Download PDF

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JP4848673B2
JP4848673B2 JP2005161666A JP2005161666A JP4848673B2 JP 4848673 B2 JP4848673 B2 JP 4848673B2 JP 2005161666 A JP2005161666 A JP 2005161666A JP 2005161666 A JP2005161666 A JP 2005161666A JP 4848673 B2 JP4848673 B2 JP 4848673B2
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blade
end mill
axial direction
rough
cut
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JP2006334713A (en
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淑人 ▲高▼田
洋一 津崎
俊史 森本
匡 御手洗
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JTEKT Corp
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    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Milling Processes (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、従動輪ハブユニットの製造方法に関する。   The present invention relates to a method for manufacturing a driven wheel hub unit.

従来より、自動車の従動輪を懸架装置に対して回転自在に支持するために、従動輪ハブユニットが用いられている。この従動輪ハブユニットは、転がり軸受と、この転がり軸受の軌道輪部材となるハブホイールとを有している。そして、ハブホイールには、ホイールやディスクロータなどが取り付けられるフランジ部が設けられている。また、ハブホイールの一方の軸端部は、円筒状に形成されており、その円筒状の端部が、径外方向に屈曲するようにかしめられている（例えば、特許文献１参照）。
上記のハブユニットでは、ハブホイールの軸端部をかしめるために、当該軸端部を円筒状にする必要がある。このため、ハブホイールを製造する途中段階である粗形品の軸端部に旋削加工を施し、底面と側周面とからなるくり抜き部を当該粗形品の軸心に沿って形成している。 Conventionally, a driven wheel hub unit has been used to rotatably support a driven wheel of an automobile with respect to a suspension device. The driven wheel hub unit includes a rolling bearing and a hub wheel that serves as a race member of the rolling bearing. The hub wheel is provided with a flange portion to which a wheel, a disc rotor or the like is attached. Further, one shaft end portion of the hub wheel is formed in a cylindrical shape, and the cylindrical end portion is caulked so as to be bent radially outward (see, for example, Patent Document 1).
In the above hub unit, in order to caulk the shaft end portion of the hub wheel, the shaft end portion needs to be cylindrical. For this reason, the shaft end portion of the rough product, which is in the middle of manufacturing the hub wheel, is turned to form a hollow portion including a bottom surface and a side peripheral surface along the axis of the rough product. .

ＷＯ０２／０１６７９１号公報WO02 / 016791

ところが、従来のハブユニットでは、ハブホイールにくり抜き部を形成する際に、最初にドリルで下穴を開けて底面の径内部を形成し、次にその下穴をバイトで拡径して側周面及び底面の径外部を形成していた。すなわち、くり抜き部を形成するのに、２種類の切削具が必要であり、作業の途中で切削具を取り替えなければならなかった。このため、非常に手間がかかり、従動輪ハブユニットの製造コストがアップする要因となっていた。
本発明は、上記問題点に鑑みてなされたものであり、製造コストを削減することができる従動輪ハブユニットの製造方法を提供することを目的とする。 However, in the conventional hub unit, when forming a hollow portion on the hub wheel, first, a pilot hole is drilled to form the inside diameter of the bottom surface, and then the pilot hole is expanded with a cutting tool to expand the side diameter. The diameter outside of the surface and the bottom surface was formed. That is, two types of cutting tools are required to form the cut-out portion, and the cutting tools have to be replaced during the work. For this reason, it is very time-consuming and has been a factor in increasing the manufacturing cost of the driven wheel hub unit.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of manufacturing a driven wheel hub unit that can reduce manufacturing costs.

本発明の方法は、転がり軸受の軌道輪部材となるハブホイールの製造途中である粗形品の軸方向内側にある軸端部に、当該軸端部を円筒状にするためのくり抜き部を、前記粗形品に対して軸方向及び径方向に移動するエンドミルによって形成する従動輪ハブユニットの製造方法であって、前記くり抜き部は、前記粗形品と同軸となる円形状の底面と、軸方向に平行な直線部及びこの直線部から前記底面の周縁へと縮径する傾斜部から構成された側周面と、からなり、前記エンドミルは、前記くり抜き部の直径よりも小さい外径を有した刃部を有し、当該刃部は、螺旋状の刃を有する刃部本体と、この刃部本体の先端側に設けられる逃げ面と、この逃げ面の角部に取り付けられるチップ刃と、前記刃部本体に螺旋状に設けられるすくい面とを有し、回転駆動される前記粗形品の軸端面に、当該粗形品に対して偏心する前記エンドミルの前記刃部を軸方向外側に向かって垂直に押し当て、前記エンドミルを軸方向外側に移動させて前記くり抜き部の前記側周面のうちの前記直線部を形成し、前記エンドミルを径方向内側及び軸方向外側に移動させ、前記粗形品の軸心と当該エンドミルの軸心とを一致させ、前記くり抜き部の前記側周面のうちの前記傾斜部、及び、前記底面を形成することを特徴とする。
本発明の方法によれば、くり抜き部の底面と側周面とを１種類の切削具（エンドミル）で一度に形成することができる。従って、従来のように切削具を交換する必要がないので、くり抜き部を容易に形成することができる。
In the method of the present invention, a hollow portion for making the shaft end portion cylindrical is formed on the shaft end portion on the inner side in the axial direction of a rough product that is in the process of manufacturing a hub wheel that is a bearing ring member of a rolling bearing. A method of manufacturing a driven wheel hub unit formed by an end mill that moves in an axial direction and a radial direction with respect to the rough product, wherein the hollow portion has a circular bottom surface that is coaxial with the rough product, a shaft The end mill has an outer diameter smaller than the diameter of the cut-out portion, and a side circumferential surface composed of a straight portion parallel to the direction and an inclined portion that is reduced in diameter from the straight portion to the periphery of the bottom surface. A blade portion main body having a spiral blade, a flank provided on the distal end side of the blade portion main body, a tip blade attached to a corner portion of the flank, A rake face spirally provided on the blade body. The blade portion of the end mill that is eccentric with respect to the rough shaped product is pressed against the shaft end surface of the rough shaped product that is rotationally driven perpendicularly outward in the axial direction, and the end mill is moved outward in the axial direction. Forming the straight portion of the side peripheral surface of the hollowed portion, moving the end mill radially inward and axially outward, and aligning the axis of the rough product with the axis of the end mill. The inclined portion and the bottom surface of the side peripheral surface of the cut-out portion are formed.
According to the method of the present invention, the bottom surface and the side peripheral surface of the cut-out portion can be formed at one time with one kind of cutting tool (end mill). Therefore, since it is not necessary to replace the cutting tool as in the prior art, the cut-out portion can be easily formed.

本発明によれば、くり抜き部を容易に形成することができるので、従動輪ハブユニットの製造コストを削減することができる。   According to the present invention, since the cut-out portion can be easily formed, the manufacturing cost of the driven wheel hub unit can be reduced.

以下、図面を参照しつつ、本発明の実施形態を説明する。
図１は、本発明の方法で製作した従動輪ハブユニット１を示す断面図である。
なお、図１の左右方向を従動輪ハブユニット１の軸方向といい、図の左側を軸方向外側、右側を軸方向内側という。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing a driven wheel hub unit 1 manufactured by the method of the present invention .
Incidentally, refer to the left-right direction in FIG. 1 and the axial direction of the driven wheel hub unit 1, the left side of FIG axially outer side, the right side is called the axially inner side.

図１に示すように、この従動輪ハブユニット１は、自動車の車輪を懸架装置に対して回転自在に支持するためのもので、転がり軸受２と、転がり軸受２の軌道輪部材となるハブホイール３と、ハブホイール３に一体に設けられた円環状のフランジ部４とを備えている。フランジ部４には、ホイールやブレーキディスクを取り付けるための複数のボルト孔５が形成されている。これらのボルト孔５には、ハブボルトＢがそれぞれ圧入によって固定されている。   As shown in FIG. 1, this driven wheel hub unit 1 is for supporting the wheel of a motor vehicle rotatably with respect to a suspension device, and is a rolling bearing 2 and a hub wheel that serves as a bearing ring member of the rolling bearing 2. 3 and an annular flange portion 4 provided integrally with the hub wheel 3. The flange portion 4 is formed with a plurality of bolt holes 5 for attaching a wheel or a brake disk. Hub bolts B are respectively fixed to these bolt holes 5 by press-fitting.

ハブホイール３は、炭素綱（Ｓ５５Ｃ）や軸受用綱などで構成されたもので、軸方向内側に設けられる小径部７と、小径部７より径が大きく当該小径部７から軸方向外側に向かって連続して設けられた大径部９とを具備している。そして、上記のフランジ部４が、大径部９の外周面から径方向外側に延びるように設けられている。   The hub wheel 3 is composed of a carbon steel (S55C), a bearing steel, or the like, and has a small diameter portion 7 provided on the inner side in the axial direction and a diameter larger than that of the small diameter portion 7 from the small diameter portion 7 toward the outer side in the axial direction. And a large-diameter portion 9 provided continuously. The flange portion 4 is provided so as to extend radially outward from the outer peripheral surface of the large diameter portion 9.

ハブホイール３の一方の軸端部である小径部７の軸方向内側の端部７ａには、当該端部７ａを円筒状にするくりぬき部Ｈが、ハブホイール３の軸心に沿って形成されている。
このくり抜き部Ｈは、ハブホイール３の粗形品３Ａ（完成品であるハブホイール３の製造途中のもの）を旋削加工することによって形成されている。そして、小径部７の端部７ａには、その軸方向内側の先端部が径外方向に屈曲変形されたかしめ部８が設けられている。また、ハブホイール３の他方の軸端部であるフランジ部４の中心部には、インロー部１０が設けられている。このインロー部１０は、軸方向外側に突出する円環状のリング部１１と、このリング部１１の径内側に形成される凹部１２とから構成されている。 A hollow portion H is formed along the axial center of the hub wheel 3 at the end portion 7a on the inner side in the axial direction of the small-diameter portion 7 which is one end portion of the hub wheel 3. ing.
This cut-out portion H is formed by turning a rough product 3A of the hub wheel 3 (in the process of manufacturing the hub wheel 3 as a finished product). The end portion 7a of the small-diameter portion 7 is provided with a caulking portion 8 in which the axially inner tip portion is bent and deformed in the radially outward direction. An inlay portion 10 is provided at the center portion of the flange portion 4 which is the other shaft end portion of the hub wheel 3. The inlay portion 10 includes an annular ring portion 11 that protrudes outward in the axial direction, and a concave portion 12 that is formed on the radially inner side of the ring portion 11.

転がり軸受２は、例えば複列玉軸受で、一対の外輪軌道面１３ａ，１３ｂを有する外輪１４と、内周面がハブホイール３における小径部７の外周面７ｂに密接するように挿嵌された内輪部材１５とを備えている。そして、内輪部材１５には、軸方向内側の外輪軌道面１３ｂに対向する内輪軌道面１６ｂが径方向外側に設けられており、ハブホイール３の大径部９の外周面には、軸方向外側の外輪軌道面１３ａに対向する内輪軌道面１６ａが設けられている。   The rolling bearing 2 is, for example, a double row ball bearing, and is inserted so that the outer ring 14 having a pair of outer ring raceway surfaces 13 a and 13 b and the inner peripheral surface are in close contact with the outer peripheral surface 7 b of the small diameter portion 7 in the hub wheel 3. And an inner ring member 15. The inner ring member 15 is provided with an inner ring raceway surface 16b facing the outer ring raceway surface 13b on the inner side in the axial direction on the outer side in the radial direction. An inner ring raceway surface 16a facing the outer ring raceway surface 13a is provided.

また、転がり軸受２には、互いに対向する内外輪軌道面に転動自在に配列された転動体である一対の玉１７と、これらの玉１７をそれぞれ周方向に所定の間隔で保持する一対の保持器１８とが設けられている。さらに、転がり軸受２は、外輪１４の外周面１４ａから径方向外側に延設されて操舵機構のナックル（図示せず）が固定される軸受フランジ１９と、ハブホイール３と外輪１２との間に形成される環状空間を軸方向両側から密封するシール部材２０とを有している。   Further, the rolling bearing 2 includes a pair of balls 17 that are rolling elements arranged on the inner and outer ring raceway surfaces facing each other, and a pair of balls 17 that hold these balls 17 at predetermined intervals in the circumferential direction. A cage 18 is provided. Furthermore, the rolling bearing 2 extends between the outer peripheral surface 14a of the outer ring 14 and the outer side 14a between the hub wheel 3 and the outer ring 12, and a bearing flange 19 to which a knuckle (not shown) of the steering mechanism is fixed. And a seal member 20 that seals the formed annular space from both sides in the axial direction.

図２は、エンドミルＣの斜視図である。
図２に示すように、このエンドミルＣは、旋削加工に用いられる切削具で、粗形品３Ａの軸端部７ａにくり抜き部Ｈを形成する際に用いられる。このエンドミルＣは、旋削加工装置（図示せず）のスライド可能なチャックに支持されるシャンクＣ１と、シャンクＣ１と一体で設けられる首Ｃ２と、首Ｃ２に連続して設けられる刃部Ｃ３とを有している。このエンドミルＣは、刃部Ｃ３の外径がくり抜き部Ｈの直径よりも小さいものが選択されている。この刃部Ｃ３は、螺旋状の刃を有する刃部本体Ｃ３１と、刃部本体Ｃ３１の先端側に設けられる２つの逃げ面Ｃ３２と、各逃げ面Ｃ３２の角部に取り付けられるチップ刃Ｃ３３と、刃部本体Ｃ３１に螺旋状に設けられるすくい面Ｃ３４とから構成されている。また、各逃げ面Ｃ３２には、油穴Ｃ３５が形成されている。 FIG. 2 is a perspective view of the end mill C. FIG.
As shown in FIG. 2, the end mill C is a cutting tool used for turning, and is used when forming a cutout portion H in the shaft end portion 7a of the rough shaped product 3A. The end mill C includes a shank C1 that is supported by a slidable chuck of a turning device (not shown), a neck C2 that is provided integrally with the shank C1, and a blade portion C3 that is provided continuously to the neck C2. Have. As the end mill C, one having an outer diameter of the blade portion C3 smaller than the diameter of the cut-out portion H is selected. The blade C3 includes a blade body C31 having a spiral blade, two flank surfaces C32 provided on the tip side of the blade body C31, and a tip blade C33 attached to a corner of each flank C32. It is comprised from the rake face C34 provided in the blade part main body C31 helically. Each flank C32 is formed with an oil hole C35.

図３は、本発明の方法によってくり抜き部Ｈが形成された粗形品３Ａの部分断面図である。なお、図３に示す粗形品３Ａは、その軸端部である小径部７の端部７ａにくり抜き部Ｈが形成されてはいるが、かしめ部８及び内輪部材１５は未だ設けられていない状態を示している。
図３に示すように、くり抜き部Ｈは、粗形品３Ａと同軸に設けられる円形状の底面Ｈ１と、底面Ｈ１の周縁に一体に設けられる断面円形状の側周面Ｈ２とを有している。また、底面Ｈ１は、径外側の径外部Ｈ１１と、径内側の径内部Ｈ１２とからなり、側周面Ｈ２は、軸方向に平行な直線部Ｈ２１と、直線部Ｈ２１から軸方向底面Ｈ１側に縮径するよう傾斜する傾斜部Ｈ２２とから構成されている。
なお、このくり抜き部Ｈによって円筒状となった小径部７の端部７ａには、その軸方向内側の先端部が揺動鍛造などによって径外方向に屈曲変形され、上記のかしめ部８が設けられる。 FIG. 3 is a partial cross-sectional view of the rough product 3A in which the cut-out portion H is formed by the method of the present invention. In addition, in the rough shaped product 3A shown in FIG. 3, the hollow portion H is formed at the end portion 7a of the small diameter portion 7 that is the shaft end portion, but the caulking portion 8 and the inner ring member 15 are not yet provided. Indicates the state.
As shown in FIG. 3, the cut-out portion H has a circular bottom surface H1 provided coaxially with the rough shaped product 3A, and a side circumferential surface H2 having a circular cross section provided integrally with the periphery of the bottom surface H1. Yes. The bottom surface H1 is composed of an outer diameter outer surface H11 and an inner diameter inner surface H12. The side peripheral surface H2 is a straight portion H21 parallel to the axial direction, and the straight portion H21 extends from the straight portion H21 toward the axial bottom surface H1. It is comprised from the inclination part H22 which inclines so that it may reduce in diameter.
Note that the end portion 7a of the small-diameter portion 7 that is cylindrical by the cut-out portion H is bent and deformed outward in the radial direction by swing forging or the like, and the above-described caulking portion 8 is provided. It is done.

図４（ａ）〜（ｄ）は、粗形品３Ａの軸端部３ａにくり抜き部Ｈを形成する工程を模式的に示している。なお、粗形品３Ａは、旋削加工装置（図示せず）の回転駆動されるチャックに支持されており、当該粗形品３Ａがその軸を中心として回転駆動されるようになっている。チャックに支持された粗形品３Ａは、その軸端部７ａが中実の状態である。また、エンドミルＣは、旋削加工装置のスライド可能なチャックに支持されており、粗形品３Ａの軸方向及び径方向に移動できるようになっている。   4A to 4D schematically show a process of forming the cutout portion H in the shaft end portion 3a of the rough shaped product 3A. The rough product 3A is supported by a rotationally driven chuck of a turning device (not shown), and the rough product 3A is rotationally driven around its axis. The coarse product 3A supported by the chuck has a solid shaft end 7a. Further, the end mill C is supported by a slidable chuck of the turning device, and can move in the axial direction and the radial direction of the rough shaped product 3A.

図４（ａ）に示すように、まず、エンドミルＣを、粗形品３Ａに対して偏心した状態に配置させ、この状態でエンドミルＣを、回転駆動される粗形品３Ａに近接するように軸方向外側（図４の左側）に向かって移動させる。
そして、回転駆動される粗形品３Ａの軸端面７ｃに、エンドミルＣの刃部Ｃ３を垂直に押し当てるとともに、図４（ｂ）に示すように、エンドミルＣを軸方向外側に向かって移動させる。これによって、くり抜き部Ｈにおける側周面Ｈ２の直線部Ｈ２１を形成する。 As shown in FIG. 4A, first, the end mill C is arranged in an eccentric state with respect to the rough shaped product 3A, and in this state, the end mill C is brought close to the rotationally shaped rough shaped product 3A. Move toward the outside in the axial direction (left side in FIG. 4).
Then , the blade portion C3 of the end mill C is vertically pressed against the shaft end surface 7c of the coarse product 3A to be rotationally driven , and the end mill C is moved outward in the axial direction as shown in FIG. 4B. . Thereby, a straight line portion H21 of the side peripheral surface H2 in the cutout portion H is formed.

図４（ｃ）に示すように、エンドミルＣを軸方向外側かつ径内側に斜めに移動させ、粗形品３Ａの軸心とエンドミルＣの軸心とを一致させる。これによって、側周面Ｈ２の傾斜部Ｈ２２を形成しつつ、底面Ｈ１の径内部Ｈ１２を形成する。
図４（ｄ）に示すように、エンドミルＣを粗形品３Ａから離反するように軸方向内側（図４の右側）に向かって移動させる。
上記のようにして、粗形品３Ａの軸端部である小径部７の端部７ａを円筒状にするくり抜き部Ｈが形成される。 As shown in FIG. 4C, the end mill C is moved obliquely outward in the axial direction and radially inward, so that the axis of the coarse product 3A and the axis of the end mill C are aligned. Thus, the inner diameter H12 of the bottom surface H1 is formed while the inclined portion H22 of the side peripheral surface H2 is formed.
As shown in FIG. 4D, the end mill C is moved inward in the axial direction (right side in FIG. 4) so as to be separated from the rough shaped product 3A.
As described above, the hollow portion H is formed in which the end portion 7a of the small-diameter portion 7 that is the shaft end portion of the coarse product 3A is cylindrical.

上記の方法によれば、くり抜き部Ｈの側周面Ｈ１と底面Ｈ２とを１種類の切削具で一度に形成することができる。従って、従来のように切削具を交換する必要がないので、くり抜き部Ｈを容易に形成することができる。
また、ハブユニット１は、ハブホイール３の軸端部にくり抜き部Ｈが形成されることによって軽量化される。これによって、懸架装置におけるばね下重量が軽くなり、自動車の走行安定性、乗り心地及び燃費を向上させることができる。 According to said method, the side peripheral surface H1 and the bottom face H2 of the hollow part H can be formed at once with one type of cutting tool. Therefore, since it is not necessary to replace the cutting tool as in the prior art, the cut-out portion H can be easily formed.
Further, the hub unit 1 is reduced in weight by forming the cutout portion H at the shaft end portion of the hub wheel 3. As a result, the unsprung weight of the suspension device is reduced, and the running stability, riding comfort and fuel consumption of the automobile can be improved.

なお、本発明は上述した実施形態に限定されるものではない。
例えば、本発明の方法は、フランジ部４に設けられるインロー部１０の凹部１２の形成にも適用可能である。 In addition, this invention is not limited to embodiment mentioned above.
For example, the method of the present invention can be applied to the formation of the recess 12 of the spigot 10 provided in the flange 4.

従動輪ハブユニットを示す断面図である。It is sectional drawing which shows a driven wheel hub unit. エンドミルを示す斜視図である。It is a perspective view which shows an end mill. 粗形品を示す部分断面図である。It is a fragmentary sectional view which shows a rough shape product. 粗形品にくり抜き部を形成する工程を模式的に示す工程図である。It is process drawing which shows typically the process of forming a hollow part in a rough shape goods.

符号の説明Explanation of symbols

１ 従動輪ハブユニット
２ 転がり軸受
３ ハブホイール
３Ａ （ハブホイールの）粗形品
４ フランジ部
７ａ 端部（軸端部）
７ｃ 軸端面
Ｃ エンドミル
Ｃ３ （エンドミルの）刃部
Ｈ くり抜き部
Ｈ１ 底面
Ｈ１１ 径外部
Ｈ１２ 径内部
Ｈ２ 側周面 DESCRIPTION OF SYMBOLS 1 Driven wheel hub unit 2 Rolling bearing 3 Hub wheel 3A (Hub wheel) rough product 4 Flange part 7a End part (shaft end part)
7c Shaft end face C End mill C3 (End mill) Blade part H Drilled part H1 Bottom face H11 Diameter outside H12 Diameter inside H2 Side circumference

Claims (1)

転がり軸受の軌道輪部材となるハブホイールの製造途中である粗形品の軸方向内側にある軸端部に、当該軸端部を円筒状にするためのくり抜き部を、前記粗形品に対して軸方向及び径方向に移動するエンドミルによって形成する従動輪ハブユニットの製造方法であって、
前記くり抜き部は、前記粗形品と同軸となる円形状の底面と、軸方向に平行な直線部及びこの直線部から前記底面の周縁へと縮径する傾斜部から構成された側周面と、からなり、
前記エンドミルは、前記くり抜き部の直径よりも小さい外径を有した刃部を有し、当該刃部は、螺旋状の刃を有する刃部本体と、この刃部本体の先端側に設けられる逃げ面と、この逃げ面の角部に取り付けられるチップ刃と、前記刃部本体に螺旋状に設けられるすくい面とを有し、
回転駆動される前記粗形品の軸端面に、当該粗形品に対して偏心する前記エンドミルの前記刃部を軸方向外側に向かって垂直に押し当て、
前記エンドミルを軸方向外側に移動させて前記くり抜き部の前記側周面のうちの前記直線部を形成し、
前記エンドミルを径方向内側及び軸方向外側に移動させ、前記粗形品の軸心と当該エンドミルの軸心とを一致させ、前記くり抜き部の前記側周面のうちの前記傾斜部、及び、前記底面を形成することを特徴とする従動輪ハブユニットの製造方法。
A hollow portion for making the shaft end cylindrical is formed on the shaft end portion on the inner side in the axial direction of the rough product that is in the process of manufacturing a hub wheel that is a bearing ring member of a rolling bearing. A method of manufacturing a driven wheel hub unit formed by an end mill that moves in an axial direction and a radial direction,
The cut-out portion includes a circular bottom surface that is coaxial with the rough product, a linear portion that is parallel to the axial direction, and a side circumferential surface that is configured by an inclined portion that is reduced in diameter from the straight portion to the periphery of the bottom surface. Consists of
The end mill has a blade portion having an outer diameter smaller than the diameter of the cut-out portion, and the blade portion includes a blade portion main body having a spiral blade and a relief provided on a distal end side of the blade portion main body. A chip, a tip blade attached to a corner of the flank, and a rake face spirally provided on the blade body,
Pressing the blade part of the end mill that is eccentric with respect to the rough shaped product vertically against the axial end surface of the rough shaped product that is rotationally driven, toward the outside in the axial direction,
Moving the end mill to the outside in the axial direction to form the linear portion of the side peripheral surface of the cut-out portion;
The end mill is moved radially inward and axially outward, the axis of the rough product is aligned with the axis of the end mill, the inclined portion of the side peripheral surface of the cut-out portion, and the A method of manufacturing a driven wheel hub unit, comprising forming a bottom surface.
JP2005161666A 2005-06-01 2005-06-01 Manufacturing method of driven wheel hub unit Expired - Fee Related JP4848673B2 (en)

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US5094573A (en) * 1988-07-21 1992-03-10 Hougen Everett D Multidirectional cutting tool
JPH10225814A (en) * 1992-06-17 1998-08-25 Makino Milling Mach Co Ltd Cutting work method
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