JP2005036905A - Method of manufacturing wheel supporting hub unit - Google Patents

Method of manufacturing wheel supporting hub unit Download PDF

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JP2005036905A
JP2005036905A JP2003275101A JP2003275101A JP2005036905A JP 2005036905 A JP2005036905 A JP 2005036905A JP 2003275101 A JP2003275101 A JP 2003275101A JP 2003275101 A JP2003275101 A JP 2003275101A JP 2005036905 A JP2005036905 A JP 2005036905A
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Prior art keywords
tip
cylindrical portion
peripheral surface
molding
hub
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JP2003275101A
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Japanese (ja)
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Nobuyuki Hagiwara
信行 萩原
Shoko Yasumura
昌紘 安村
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NSK Ltd
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NSK Ltd
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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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/025—Special design or construction with rolling or wobbling dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for reducing radial force applied to a hub 2 when plastically deforming a cylindrical portion 10 at its front end outward in the radial direction to form a caulked portion. <P>SOLUTION: To form the caulked portion, a force plunger 15a is pushed at its lower end face against the whole periphery of the front end of the cylindrical portion 10 in the axial direction. Thus, the cylindrical portion 10 is plastically deformed at its front end a preset amount outward to the radial direction (preliminary molding). Then, the force plunger 15a being rockingly turned is pushed at its lower end face against the front end of the cylindrical portion 10. Thus, the cylindrical portion 10 is further plastically deformed at its front end outward to the radial direction to form the caulked portion (main molding). In the preliminary molding, no radial force is substantially applied to the hub 2, while, in the main molding, smaller radial force is applied to the hub 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、自動車の車輪を懸架装置に対して回転自在に支持する為の車輪支持用ハブユニットの製造方法に関する。   The present invention relates to a method of manufacturing a wheel support hub unit for rotatably supporting a wheel of an automobile with respect to a suspension device.

自動車の車輪は、車輪支持用ハブユニットにより懸架装置に支持する。図５は、この様な車輪支持用ハブユニットの従来構造の第１例として、従動輪（ＦＦ車の後輪、ＦＲ車及びＲＲ車の前輪）用のものを示している。この車輪支持用ハブユニット１は、軸部材であるハブ２と、内輪３と、外輪４と、複数個の転動体５、５とを備える。   The wheels of the automobile are supported on the suspension device by a wheel supporting hub unit. FIG. 5 shows a driven wheel (rear wheel of FF vehicle, front wheel of FR vehicle and RR vehicle) as a first example of such a conventional wheel support hub unit. The wheel support hub unit 1 includes a hub 2 that is a shaft member, an inner ring 3, an outer ring 4, and a plurality of rolling elements 5 and 5.

このうちのハブ２の外周面の外端（軸方向に関して「外」とは、自動車への組み付け状態で車両の幅方向外側を言い、図５の左側。反対に軸方向に関して「内」とは、車両の幅方向中央側を言い、図５の右側。）寄り部分には、車輪を支持する為のフランジ６を、同じく中間部には第一の内輪軌道７ａを、同じく内端部にはこの第一の内輪軌道７ａを形成した部分よりも外径寸法が小さくなった小径段部８を、それぞれ形成している。尚、上記第一の内輪軌道７ａは、図示の様に上記ハブ２の中間部外周面に直接形成する場合の他、このハブ２の中間部に外嵌した別体の内輪の外周面に形成する場合もある。この場合には、ハブの外周面の内端部でこの別体の内輪よりも突出した部分が小径段部となり、この別体の内輪の内端面が、下述する段差面となる。   Outer end of the outer peripheral surface of the hub 2 ("outside" in the axial direction means the outside in the width direction of the vehicle in the assembled state in the automobile, and is the left side of Fig. 5. On the contrary, "inside" in the axial direction means The right side of FIG. 5 is the center side in the width direction of the vehicle.) The flange 6 for supporting the wheel is provided at the side portion, the first inner ring raceway 7a is provided at the intermediate portion, and the inner end portion is also provided at the inner end portion. Small-diameter step portions 8 each having an outer diameter smaller than the portion where the first inner ring raceway 7a is formed are formed. The first inner ring raceway 7a is formed not only directly on the outer peripheral surface of the intermediate portion of the hub 2 as shown, but also on the outer peripheral surface of a separate inner ring that is externally fitted to the intermediate portion of the hub 2. There is also a case. In this case, a portion protruding from the separate inner ring at the inner end portion of the outer peripheral surface of the hub becomes a small-diameter stepped portion, and the inner end surface of the separate inner ring becomes a stepped surface described below.

上記内輪３は、上記小径段部８に外嵌している。この様な内輪３は、上記ハブ２の内端部に設けた円筒部１０のうち、この内輪３の内端面から軸方向に突出した部分を径方向外方に塑性変形させて形成したかしめ部１１により、上記小径段部８の基端部に存在する段差面９に抑え付けている。この様な内輪３の外周面には、第二の内輪軌道７ｂを形成している。   The inner ring 3 is fitted on the small-diameter step 8. Such an inner ring 3 is a caulking portion formed by plastically deforming a portion protruding in the axial direction from the inner end surface of the inner ring 3 out of the cylindrical portion 10 provided at the inner end of the hub 2. 11, the stepped surface 9 is suppressed to the base end portion of the small-diameter stepped portion 8. A second inner ring raceway 7b is formed on the outer peripheral surface of such an inner ring 3.

又、上記外輪４は、外周面に外向フランジ状の取付部１２を、内周面に第一、第二の外輪軌道１３ａ、１３ｂを、それぞれ形成している。そして、これら第一、第二の各外輪軌道１３ａ、１３ｂと、上記第一、第二の各内輪軌道７ａ、７ｂとの間に、それぞれ複数個ずつの転動体５、５を設けている。尚、図示の例では、これら各転動体５、５として玉を使用しているが、重量の嵩む自動車用の車輪支持用ハブユニットの場合には、これら転動体としてテーパころを使用する場合もある。   The outer ring 4 has an outward flange-shaped mounting portion 12 on the outer peripheral surface and first and second outer ring raceways 13a and 13b on the inner peripheral surface. A plurality of rolling elements 5, 5 are provided between the first and second outer ring raceways 13a, 13b and the first and second inner ring raceways 7a, 7b. In the illustrated example, balls are used as the rolling elements 5 and 5. However, in the case of a heavy wheel supporting hub unit for automobiles, tapered rollers may be used as the rolling elements. is there.

又、上述の様に構成する車輪支持用ハブユニット１のうち、上記かしめ部１１は、特許文献１〜３等に記載されている様に、次の様にして形成する。先ず、上記かしめ部１１を形成する以前のハブ２に対し、図５に示した様に、内輪３、外輪４、及び複数個の転動体５、５を組み付ける。次いで、図６に示す様に、上記ハブ２を、各方向の変位を阻止した状態で支持する。図示の例では、このハブ２の径方向の変位を阻止する為に、上記内輪３の外周面を抑え片１４により抑え付けている。この様にハブ２を支持したならば、次いで、成形用治具である押型１５を使用して、このハブ２の内端部に形成した円筒部１０にローリングプレス加工（揺動かしめ加工）を施す。   Further, in the wheel supporting hub unit 1 configured as described above, the caulking portion 11 is formed as follows, as described in Patent Documents 1 to 3 and the like. First, as shown in FIG. 5, the inner ring 3, the outer ring 4, and the plurality of rolling elements 5, 5 are assembled to the hub 2 before the caulking portion 11 is formed. Next, as shown in FIG. 6, the hub 2 is supported in a state where displacement in each direction is prevented. In the illustrated example, the outer peripheral surface of the inner ring 3 is held down by a holding piece 14 in order to prevent the radial displacement of the hub 2. If the hub 2 is supported in this way, then, using a pressing die 15 as a forming jig, a rolling press process (oscillation caulking process) is performed on the cylindrical part 10 formed on the inner end part of the hub 2. Apply.

上記押型１５は、先端面（図６〜７の下端面）の中央部に、その先端部を上記円筒部１０の内側に挿入可能な円すい台状の凸部１６を形成すると共に、同じくこの凸部１６の周囲に断面円弧状の凹部１７を、全周に亙り形成している。この様な押型１５を使用して上記円筒部１０にローリングプレス加工を施す場合には、先ず、図６に示す様に、上記ハブ２の中心軸Ｘに対して上記押型１５の中心軸Ｙを傾斜角度θ（θ＞０。例えば、θ＝１〜１０度程度。）だけ傾斜させた状態で、この押型１５の先端面（上記凸部１６の外周面及び上記凹部１７の内面）の一部を、上記円筒部１０の先端部（図６〜７の上端部）内周面の円周方向一部に当接させる。そして、この状態で、上記押型１５を上記ハブ２の中心軸Ｘを中心として回転（傾斜角度θで揺動回転）させつつ、上記ハブ２の軸方向に関して上記押型１５を上記円筒部１０に向け強く押圧する。これにより、上記押型１５の先端面から上記円筒部１０の先端部内周面の円周方向一部に径方向外方に向く押圧力を、この押圧力の作用点を円周方向に移動させながら付加する。これにより、上記円筒部１０の先端部を径方向外方に塑性変形させて、上記かしめ部１１を形成する。   The pressing die 15 is formed with a truncated cone-shaped convex portion 16 in which the distal end portion can be inserted inside the cylindrical portion 10 at the center portion of the distal end surface (the lower end surfaces in FIGS. 6 to 7). A concave portion 17 having a circular arc cross section is formed around the periphery of the portion 16. In the case where the cylindrical portion 10 is subjected to rolling press processing using such a pressing die 15, first, as shown in FIG. 6, the central axis Y of the pressing die 15 is set to the central axis X of the hub 2. Part of the tip surface (the outer peripheral surface of the convex portion 16 and the inner surface of the concave portion 17) of the pressing die 15 in a state where it is inclined by an inclination angle θ (θ> 0; for example, θ = 1 to 10 degrees). Is brought into contact with a part in the circumferential direction of the inner peripheral surface of the tip portion (the upper end portion in FIGS. 6 to 7) of the cylindrical portion 10. In this state, the pressing die 15 is directed toward the cylindrical portion 10 with respect to the axial direction of the hub 2 while rotating the pressing die 15 about the central axis X of the hub 2 (oscillating and rotating at an inclination angle θ). Press strongly. As a result, a pressing force directed radially outward from the tip surface of the pressing die 15 to a part of the inner peripheral surface of the tip portion of the cylindrical portion 10 in the radial direction is moved in the circumferential direction. Append. As a result, the caulking portion 11 is formed by plastically deforming the distal end portion of the cylindrical portion 10 radially outward.

尚、上述した様なローリングプレス加工は、上記傾斜角度θを一定に保持して行なう（特許文献１、３参照）他、この傾斜角度θを途中で変化させて行なう（特許文献２参照）場合もある。何れにしても、従来の製造方法の場合には、上記円筒部１０に対してローリングプレス加工のみを施す事により、上記かしめ部１１を形成する。   In addition, the rolling press work as described above is performed with the inclination angle θ kept constant (see Patent Documents 1 and 3), and is performed while the inclination angle θ is changed in the middle (see Patent Document 2). There is also. In any case, in the case of the conventional manufacturing method, the caulking portion 11 is formed by performing only rolling press processing on the cylindrical portion 10.

上述の様に構成する車輪支持用ハブユニット１を自動車に組み付けるには、前記外輪４の外周面に形成した取付部１２を懸架装置に結合固定すると共に、上記ハブ２の外端寄り部外周面に形成したフランジ６に車輪を固定する。この結果、この車輪を上記懸架装置に対して回転自在に支持する事ができる。   In order to assemble the wheel supporting hub unit 1 configured as described above to an automobile, the mounting portion 12 formed on the outer peripheral surface of the outer ring 4 is coupled and fixed to a suspension device, and the outer peripheral portion of the hub 2 is closer to the outer end. The wheel is fixed to the flange 6 formed in the above. As a result, the wheel can be rotatably supported with respect to the suspension device.

次に、図８は、従動輪用の車輪支持用ハブユニットの第２例を示している。この第２例の車輪支持用ハブユニット１ａは、外輪４ａの外端寄り部外周面に車輪を支持固定する為のフランジ６を設けると共に、この外輪４ａの径方向内側に設けた軸部材１９の内端部に、懸架装置を構成するナックルに結合固定する為の取付部１２を設けている。又、第二の内輪軌道７ｂを上記軸部材１９の中間部外周面に直接形成すると共に、第一の内輪軌道７ａをこの軸部材１９の外端部に設けた小径段部８に外嵌した内輪３の外周面に形成している。又、この小径段部８に外嵌した内輪３は、上記軸部材１９の外端部に設けた円筒部１０のうち、この小径段部８に外嵌した内輪３よりも軸方向外方に突出した先端部を径方向外方に塑性変形させて形成したかしめ部１１により、上記小径段部８の段差面９に向け抑え付けている。そして、このかしめ部１１による抑え付け力により、複数個の転動体５、５に予圧を付与している。この様なかしめ部１１も、上述した従来構造の第１例の場合と同様にして形成する。   Next, FIG. 8 shows a second example of a wheel support hub unit for a driven wheel. The wheel support hub unit 1a of the second example is provided with a flange 6 for supporting and fixing the wheel on the outer peripheral surface near the outer end of the outer ring 4a, and the shaft member 19 provided on the radially inner side of the outer ring 4a. A mounting portion 12 is provided at the inner end for coupling and fixing to a knuckle constituting the suspension device. Further, the second inner ring raceway 7b is formed directly on the outer peripheral surface of the intermediate portion of the shaft member 19, and the first inner ring raceway 7a is externally fitted to the small-diameter step portion 8 provided at the outer end portion of the shaft member 19. It is formed on the outer peripheral surface of the inner ring 3. Further, the inner ring 3 that is externally fitted to the small-diameter step portion 8 is more outward in the axial direction than the inner ring 3 that is externally fitted to the small-diameter step portion 8 in the cylindrical portion 10 provided at the outer end portion of the shaft member 19. The protruding tip portion is pressed against the step surface 9 of the small-diameter step portion 8 by a caulking portion 11 formed by plastic deformation outward in the radial direction. A preload is applied to the plurality of rolling elements 5 and 5 by the pressing force of the caulking portion 11. Such a caulking portion 11 is also formed in the same manner as in the first example of the conventional structure described above.

次に、図９は、駆動輪（ＦＦ車の前輪、ＦＲ車及びＲＲ車の後輪、４ＷＤ車の全車輪）用の車輪支持用ハブユニットの１例を示している。この駆動輪用の車輪支持用ハブユニット１ｂの場合、軸部材であるハブ２ａの中心部に、駆動軸であるスプライン軸を係合させる為の、スプライン孔２０を設けている。その他の部分の構造及び作用は、かしめ部１１の形成方法を含めて、前述の図５に示した車輪支持用ハブユニット１の場合と同様である。   Next, FIG. 9 shows an example of a wheel support hub unit for driving wheels (front wheels of FF vehicles, rear wheels of FR vehicles and RR vehicles, all wheels of 4WD vehicles). In the case of the wheel supporting hub unit 1b for driving wheels, a spline hole 20 is provided at the center of the hub 2a that is a shaft member for engaging the spline shaft that is a driving shaft. The structure and operation of the other parts are the same as in the case of the wheel supporting hub unit 1 shown in FIG. 5, including the method of forming the caulking part 11.

前述した様に、従来の車輪支持用ハブユニットの製造方法の場合には、上記ハブ２、２ａ又は軸部材１９の端部に形成した円筒部１０に対し、ローリングプレス加工のみを施す事によって、上記かしめ部１１を形成する。言い換えれば、このかしめ部１１を形成する際に、上記円筒部１０に対して最初からローリングプレス加工を施す。ところが、この様に円筒部１０に対して最初からローリングプレス加工を施すと、次の様な不都合を生じる。   As described above, in the case of the conventional method for manufacturing a wheel-supporting hub unit, by performing only rolling press processing on the cylindrical portion 10 formed at the end of the hub 2, 2a or the shaft member 19, The caulking portion 11 is formed. In other words, when the caulking portion 11 is formed, the cylindrical portion 10 is subjected to rolling press processing from the beginning. However, when the rolling press processing is performed on the cylindrical portion 10 from the beginning as described above, the following inconvenience occurs.

即ち、上記円筒部１０に対してローリングプレス加工を施す際には、前記押型１５の先端面から上記円筒部１０の先端部内周面の円周方向一部に押圧力を付加する。ところが、上記ハブ２、２ａ及び軸部材１９の中心軸Ｘを基準とするこの押圧力の径方向成分（これらハブ２及び軸部材１９を径方向に変位させようとする力）は、上記中心軸Ｘに対する上記円筒部１０の先端部内周面の傾斜角度が小さい程、大きくなる。言い換えれば、上記押圧力の径方向成分は、上記円筒部１０の先端部が未だ径方向外方に塑性変形していない初期状態で、最大となる。この為、上記円筒部１０に対して最初からローリングプレス加工を施すと、この加工の初期段階で、上記押圧力の径方向成分が非常に大きくなる。従って、この様な大きな径方向成分に対して上記ハブ２、２ａ及び軸部材１９が径方向に変位するのを確実に防止できる様にすべく、前記抑え片１４を含んで構成する、成形機の支持構造の剛性を十分に確保する必要がある。この結果、従来の製造方法を実施する場合には、上記成形機のコストが高くなる。   That is, when rolling pressing is performed on the cylindrical portion 10, a pressing force is applied from the distal end surface of the pressing die 15 to a part of the inner peripheral surface of the distal end portion of the cylindrical portion 10 in the circumferential direction. However, the radial component of the pressing force with respect to the center axis X of the hubs 2 and 2a and the shaft member 19 (the force for displacing the hub 2 and the shaft member 19 in the radial direction) is the center axis. The smaller the inclination angle of the inner peripheral surface of the distal end portion of the cylindrical portion 10 with respect to X, the larger. In other words, the radial component of the pressing force is maximized in an initial state where the tip of the cylindrical portion 10 has not yet been plastically deformed radially outward. For this reason, if rolling press processing is performed on the cylindrical portion 10 from the beginning, the radial component of the pressing force becomes very large at the initial stage of the processing. Therefore, a molding machine including the restraining piece 14 to reliably prevent the hub 2, 2a and the shaft member 19 from being displaced in the radial direction with respect to such a large radial component. It is necessary to ensure sufficient rigidity of the support structure. As a result, when the conventional manufacturing method is carried out, the cost of the molding machine increases.

又、上記円筒部１０に対してローリングプレス加工を施す際に、この円筒部１０の先端部内周面と上記押型１５の先端面との当接部の面積は、この円筒部１０の先端部が径方向外方に塑性変形して、この先端部内周面の断面形状が上記押型１５の先端面の断面形状に近づく程、大きくなる。言い換えれば、上記当接部の面積は、上記円筒部１０の先端部が未だ径方向外方に塑性変形していない初期状態で、最小となる。この為、上記円筒部１０に対して最初からローリングプレス加工を施すと、この加工の初期段階で、上記当接部の面積が非常に小さくなり、結果としてこの当接部の面圧が非常に高くなる。この結果、上記押型１５の先端面が損傷し易くなると共に、この損傷が上記円筒部１０の先端部内周面に転写されて、形成後のかしめ部１１の表面が粗くなる可能性がある。そして、これらの事態を招いた場合には、上記押型１５と上記かしめ部１１との寿命が短くなる。   Further, when the rolling process is performed on the cylindrical portion 10, the area of the contact portion between the inner peripheral surface of the distal end portion of the cylindrical portion 10 and the distal end surface of the pressing die 15 is determined by the distal end portion of the cylindrical portion 10. As the cross-sectional shape of the inner peripheral surface of the tip portion approaches the cross-sectional shape of the front end surface of the pressing die 15, it becomes larger as it is plastically deformed radially outward. In other words, the area of the abutting portion is minimized in the initial state where the tip of the cylindrical portion 10 has not yet been plastically deformed radially outward. For this reason, when rolling press processing is performed on the cylindrical portion 10 from the beginning, the area of the contact portion becomes very small at the initial stage of the processing, and as a result, the surface pressure of the contact portion becomes very high. Get higher. As a result, the front end surface of the pressing die 15 is likely to be damaged, and this damage is transferred to the inner peripheral surface of the front end portion of the cylindrical portion 10 and the surface of the caulking portion 11 after formation may be roughened. And when these situations are invited, the lifetime of the pressing die 15 and the caulking portion 11 is shortened.

特開平１０−２７２９０３号公報Japanese Patent Laid-Open No. 10-272903 特開２００２−２１８６４号公報JP 2002-21864 A 特開２００２−１３９０６０号公報JP 2002-139060 A

本発明の車輪支持用ハブユニットの製造方法は、上述の様な事情に鑑み、軸部材の支持構造の剛性を小さくできる様にして、この支持構造を含んで構成する成形機の低廉化を図る事、並びに、かしめ部を形成する際の成形用治具と円筒部との当接部の面圧を小さく抑える事により、これら成形用治具及びかしめ部の寿命延長を図る事を目的として発明したものである。   In view of the above-described circumstances, the wheel support hub unit manufacturing method of the present invention can reduce the rigidity of the support structure of the shaft member, thereby reducing the cost of the molding machine including the support structure. The invention also aims to extend the life of these forming jigs and caulking parts by reducing the surface pressure of the contact part between the forming jig and the cylindrical part when forming the caulking parts. It is a thing.

本発明の車輪支持用ハブユニットの製造方法が対象とする、車輪支持用ハブユニットは、内周面に複列の外輪軌道を有する外輪と、外周面に複列の内輪軌道を有する内輪相当部材と、これら各外輪軌道と各内輪軌道との間にそれぞれ複数個ずつ設けた転動体とを備える。
又、このうちの内輪相当部材は、その外周面に上記複列の内輪軌道のうちの何れか一方の内輪軌道を直接又は別体の部材を介して形成した軸部材と、その外周面に他方の内輪軌道を形成した内輪とを備える。そして、上記軸部材の一端部に設けた小径段部に、この内輪を外嵌している。更にこの小径段部に外嵌した内輪を、上記軸部材の一端部に設けた円筒部のうちこの内輪の一端面から突出した先端部を径方向外方に塑性変形させて形成したかしめ部により、上記小径段部の基端部に存在する段差面に向け抑え付け、且つ上記各転動体に予圧を付与した状態で、上記軸部材に結合固定している。
そして、使用時には、上記外輪と上記内輪相当部材とのうちの何れか一方の部材を懸架装置を構成するナックルに結合固定すると共に、他方の部材に車輪を支持固定する。 A wheel support hub unit targeted by a method for manufacturing a wheel support hub unit according to the present invention includes an outer ring having a double row outer ring raceway on an inner peripheral surface and an inner ring equivalent member having a double row inner ring raceway on an outer peripheral surface. And a plurality of rolling elements provided between each outer ring raceway and each inner ring raceway.
Of these, the inner ring equivalent member includes a shaft member in which any one of the inner ring raceways in the double row is formed directly or via a separate member on the outer peripheral surface, and the other on the outer peripheral surface. And an inner ring forming an inner ring raceway. And this inner ring | wheel is externally fitted by the small diameter step part provided in the one end part of the said shaft member. Further, the inner ring fitted on the small-diameter step portion is formed by a caulking portion formed by plastically deforming a distal end portion projecting from one end surface of the inner ring in the cylindrical portion provided at one end portion of the shaft member radially outward. The shaft member is coupled and fixed to the shaft member in a state where it is suppressed toward the step surface existing at the base end portion of the small diameter step portion and preload is applied to each rolling element.
In use, one of the outer ring and the inner ring equivalent member is coupled and fixed to a knuckle constituting the suspension device, and the wheel is supported and fixed to the other member.

この様な車輪支持用ハブユニットを対象とする、本発明の車輪支持用ハブユニットの製造方法は、先ず、上記円筒部の先端部を径方向外方に所定量だけ塑性変形させる事に伴い、上記軸部材の中心軸に対するこの先端部内周面の傾斜角度を所定量だけ大きくする予備成形を行なう。その後、この先端部内周面の一部に押圧力を、この押圧力の作用点を円周方向に移動させながら付加する事により、上記先端部を更に径方向外方に塑性変形させて上記かしめ部を形成する本成形（例えば、前述したローリングプレス加工による成形）を行なう。   The method of manufacturing the wheel support hub unit of the present invention, which is intended for such a wheel support hub unit, first involves plastically deforming the tip of the cylindrical portion radially outward by a predetermined amount. Preliminary molding is performed to increase the inclination angle of the inner peripheral surface of the tip portion with respect to the central axis of the shaft member by a predetermined amount. After that, by applying a pressing force to a part of the inner peripheral surface of the tip portion while moving the point of action of the pressing force in the circumferential direction, the tip portion is further plastically deformed radially outward to cause the caulking. The main forming for forming the portion (for example, forming by the rolling press process described above) is performed.

又、請求項２に記載した車輪支持用ハブユニットの製造方法の場合には、上記予備成形を行なう為、円筒部の先端部内周面に押圧力を、全周に亙って均一に付加する事により、この先端部を径方向外方に所定量だけ塑性変形させる。   Further, in the case of the wheel support hub unit manufacturing method according to the second aspect, in order to perform the preforming, a pressing force is uniformly applied to the inner peripheral surface of the tip portion of the cylindrical portion over the entire circumference. By this, the tip is plastically deformed by a predetermined amount radially outward.

又、請求項３に記載した車輪支持用ハブユニットの製造方法の場合には、上記予備成形を行なう為、その外径寸法が軸方向基端側に向かう程大きくなる成形用治具の外周面を、上記軸部材の一端部に設けた円筒部の先端部内周面に全周に亙り当接させた状態で、上記成形用治具をこの円筒部の内側に押し込む事により、この成形用治具の外周面からこの円筒部の先端部内周面に押圧力を、全周に亙って均一に付加する事で、この先端部を径方向外方に所定量だけ塑性変形させる。   Further, in the case of the wheel support hub unit manufacturing method according to claim 3, in order to perform the pre-molding, the outer peripheral surface of the molding jig whose outer diameter increases toward the proximal end in the axial direction. In a state where the molding jig is pushed into the inside of the cylindrical portion while being in contact with the inner peripheral surface of the distal end portion of the cylindrical portion provided at one end of the shaft member. By applying a pressing force uniformly from the outer peripheral surface of the tool to the inner peripheral surface of the tip of the cylindrical portion over the entire periphery, the tip is plastically deformed by a predetermined amount radially outward.

又、請求項４に記載した車輪支持用ハブユニットの製造方法の場合には、上記予備成形と上記本成形とを、これら各成形を行なう為の成形用治具を組み付け可能な１台の成形機を使用して行なう。
特に、請求項５に記載した車輪支持用ハブユニットの製造方法の場合には、上記予備成形と上記本成形とで、１個の成形用治具を共用する。 Further, in the case of the wheel support hub unit manufacturing method according to claim 4, the preforming and the main molding can be performed by one molding capable of assembling a molding jig for performing each molding. Using the machine.
In particular, in the case of the wheel support hub unit manufacturing method according to the fifth aspect of the present invention, one preforming jig is shared by the preliminary molding and the main molding.

上述した様な本発明の車輪支持用ハブユニットの製造方法の場合、特に請求項２〜３に記載した発明で上記予備成形を行なう際には、上記円筒部の先端部内周面の全周に対して押圧力を均一に付加する為、上記軸部材の中心軸を基準とするこの押圧力の径方向成分（この軸部材を径方向に変位させようとする力）は、上記円筒部の全周で相殺されてゼロになる。一方、上記本成形を行なう際には、この円筒部の先端部内周面の円周方向一部に押圧力を、この押圧力の作用点を円周方向に移動させながら付加する為、上記軸部材の中心軸を基準とするこの押圧力の径方向成分が相殺されてゼロになる事はない。但し、上記本成形は、上記予備成形を行なった後、即ち、上記軸部材の中心軸に対する上記円筒部の先端部内周面の傾斜角度を或る程度大きくした状態で行なう為、上記円筒部の先端部内周面に付加した押圧力の径方向成分を小さく抑える事ができる。この理由は、上記円筒部の先端部内周面に付加した押圧力の径方向成分は、上記軸部材の中心軸に対するこの円筒部の先端部内周面の傾斜角度が大きくなる程小さくなる為である。   In the case of the method for manufacturing a wheel supporting hub unit of the present invention as described above, particularly when the preforming is performed in the invention described in claims 2 to 3, the entire circumference of the inner peripheral surface of the tip end portion of the cylindrical portion is provided. In order to uniformly apply a pressing force to the shaft member, the radial component of the pressing force with respect to the central axis of the shaft member (the force for displacing the shaft member in the radial direction) It cancels out at the lap and becomes zero. On the other hand, when performing the main molding, in order to apply a pressing force to a part of the inner peripheral surface of the tip of the cylindrical portion in the circumferential direction while moving the point of action of the pressing force in the circumferential direction, the shaft The radial direction component of this pressing force with respect to the central axis of the member is not canceled and does not become zero. However, since the main molding is performed after the preliminary molding, that is, in a state where the inclination angle of the inner peripheral surface of the tip of the cylindrical portion with respect to the central axis of the shaft member is increased to some extent, The radial component of the pressing force applied to the inner peripheral surface of the tip can be kept small. This is because the radial component of the pressing force applied to the inner peripheral surface of the tip of the cylindrical portion becomes smaller as the inclination angle of the inner peripheral surface of the tip of the cylindrical portion with respect to the central axis of the shaft member becomes larger. .

又、本発明の場合、特に請求項２〜３に記載した発明で上記予備成形を行なう際には、押圧力を付加する為に使用する成形用治具を、上記円筒部の先端部内周面の全周に対して当接させる事になる。この為、この当接部の面積を十分に確保できる。一方、上記本成形を行なう際には、押圧力を付加する為に使用する成形用治具を、上記円筒部の先端部内周面の円周方向一部にのみ当接させる事になる。但し、上記本成形を行なう際には、上記予備成形によって上記円筒部の先端部内周面が凸曲面となっている。この為、この本成形を行なう為の成形用治具として、前述した押型１５の様に先端面の形状が凹曲面であるものを使用すれば、この本成形を行なう際に、上記円筒部の先端部内周面と成形用治具の先端面との当接部の面積を大きくする事ができる。従って、本発明の場合には、上記かしめ部を形成する際に、上記円筒部の先端部内周面と成形用治具の先端面との当接部の面圧を低く抑える事ができる。   Further, in the case of the present invention, in particular, when performing the preforming in the invention described in claims 2 to 3, a molding jig used for applying a pressing force is used as the inner peripheral surface of the tip of the cylindrical portion. It will be in contact with the entire circumference of the. For this reason, the area of the contact portion can be sufficiently secured. On the other hand, when performing the main molding, a molding jig used for applying a pressing force is brought into contact with only a part in the circumferential direction of the inner peripheral surface of the tip of the cylindrical portion. However, when the main molding is performed, the inner peripheral surface of the tip of the cylindrical portion is a convex curved surface by the preliminary molding. Therefore, if a tool having a concave curved surface as in the above-described pressing die 15 is used as a molding jig for performing this main molding, It is possible to increase the area of the contact portion between the inner peripheral surface of the tip portion and the tip surface of the forming jig. Therefore, in the case of the present invention, when the caulking portion is formed, the surface pressure of the abutting portion between the inner peripheral surface of the tip portion of the cylindrical portion and the tip surface of the forming jig can be suppressed low.

尚、上述した本発明（特に、請求項２〜３に記載した発明）の場合とは異なり、上記かしめ部を、予備成形のみ（上記円筒部の先端部内周面に押圧力を、全周に亙り均一に付加する事により、この先端部を径方向外方に塑性変形させるのみ）で完成させる方法も考えられる。ところが、この様な方法では、上記かしめ部の形成作業の途中段階から非常に大きな押圧力が必要になる為、この押圧力を発生させる為の巨大な設備が必要になり、コストが嵩む。更には、上記円筒部の先端部内周面と成形用治具の先端面との当接部の面圧が過大となり、この成形用治具に損傷が生じ易くなる。これに対し、本発明（特に、請求項２〜３に記載した発明）の場合には、上述した通り、これらの不都合が生じる事はない。   Unlike the case of the present invention described above (particularly, the invention described in claims 2 to 3), the above caulking portion is preliminarily molded only (the pressing force is applied to the inner peripheral surface of the tip portion of the cylindrical portion on the entire circumference). A method is also conceivable in which the tip portion is completed only by plastic deformation in the radially outward direction by adding the contact uniformly. However, in such a method, a very large pressing force is required from the middle of the operation of forming the caulking portion. Therefore, a huge facility for generating the pressing force is required, and the cost increases. Furthermore, the surface pressure of the contact portion between the inner peripheral surface of the tip of the cylindrical portion and the tip surface of the molding jig becomes excessive, and the molding jig is easily damaged. On the other hand, in the case of the present invention (particularly, the invention described in claims 2 to 3), as described above, these problems do not occur.

又、請求項４〜５に記載した発明の場合には、上記予備成形と上記本成形とを１台の成形機を使用して行なう為、上記かしめ部の形成作業の能率化を図れる。特に、請求項５に記載した発明の場合には、上記予備成形と上記本成形とで、１個の成形用治具を共用する為、上記かしめ部の形成作業の能率化をより十分に図れる。   Further, in the case of the inventions described in claims 4 to 5, since the preliminary molding and the main molding are performed using a single molding machine, it is possible to improve the efficiency of the work of forming the caulking portion. In particular, in the case of the invention described in claim 5, since a single forming jig is shared between the pre-forming and the main forming, it is possible to more efficiently improve the operation of forming the caulking portion. .

本発明の車輪支持用ハブユニットの製造方法は、以上に述べた様に構成され作用する為、かしめ部を形成する際に、軸部材に加わる径方向の力を小さく抑える事ができる。従って、成形機を構成する、この軸部材の支持構造の剛性を小さくする事ができ、この成形機の低廉化を図れる。又、上記かしめ部を形成する際に、上記軸部材の内端部に形成した円筒部と成形用治具との当接部に作用する面圧を低く抑える事ができる。この為、上記かしめ部とこの成形用治具とが損傷するのを防止する事ができ、結果として、これらかしめ部及び成形用治具の寿命延長を図れる。   Since the wheel support hub unit manufacturing method of the present invention is configured and operates as described above, the radial force applied to the shaft member can be kept small when the caulking portion is formed. Therefore, the rigidity of the support structure for the shaft member constituting the molding machine can be reduced, and the cost of the molding machine can be reduced. Further, when the caulking portion is formed, the surface pressure acting on the contact portion between the cylindrical portion formed at the inner end portion of the shaft member and the forming jig can be suppressed to a low level. For this reason, it is possible to prevent the caulking portion and the forming jig from being damaged, and as a result, the life of the caulking portion and the forming jig can be extended.

図１〜４は、本発明の実施の形態の１例（実施例１）を示している。尚、本例の特徴は、かしめ部１１の形成方法にある。実施の対象となる車輪支持用ハブユニット１は、前述の図５に示したものである。この為、重複する説明は省略若しくは簡略にし、以下、本例の特徴部分を中心に説明する。   1 to 4 show an example of the embodiment of the present invention (Example 1). The feature of this example is the method for forming the caulking portion 11. The wheel support hub unit 1 to be implemented is the one shown in FIG. For this reason, the overlapping description will be omitted or simplified, and the following description will focus on the features of this example.

本例の場合、上記かしめ部１１は、ハブ２の内端部に形成した円筒部１０に対し、予備成形を行なった後、本成形を行なう事により形成する。又、本例の場合、これら予備成形と本成形とのそれぞれを、１台の成形機に組み付けた、１個の成形用治具を使用して行なう。本例の場合、この成形用治具として、前述した押型１５（図６〜７）とほぼ同様の構造を有する押型１５ａを使用する。即ち、この押型１５ａは、先端面（図１〜３の下端面）の中央部に、その先端部を上記円筒部１０の内側に挿入可能な円すい台状の凸部１６ａを形成すると共に、同じくこの凸部１６ａの周囲に断面円弧状の凹部１７ａを、全周に亙り形成している。   In the case of this example, the caulking portion 11 is formed by performing the main molding after performing the preliminary molding on the cylindrical portion 10 formed at the inner end portion of the hub 2. In the case of this example, each of the preliminary molding and the main molding is performed by using one molding jig assembled in one molding machine. In the case of this example, a pressing die 15a having a structure substantially similar to that of the aforementioned pressing die 15 (FIGS. 6 to 7) is used as the forming jig. That is, the pressing die 15a is formed with a truncated cone-shaped convex portion 16a in which the tip portion can be inserted inside the cylindrical portion 10 at the center portion of the tip surface (the lower end surface in FIGS. 1 to 3). A concave portion 17a having a circular arc cross section is formed around the entire circumference of the convex portion 16a.

この様な押型１５ａを使用して、上記予備成形及び本成形を行なう場合には、先ず、上記かしめ部１１を形成する以前のハブ２に対し、図２〜３に示す様に、内輪３、外輪４、及び複数個の転動体５、５を組み付ける。次いで、上記ハブ２を、各方向の変位を阻止した状態で上記成形機に支持する。図示の例では、このハブ２の軸方向の変位を阻止する為に、このハブ２の外端部を下方に向けた状態で、このハブ２を支持台１８の上面に載置している。又、このハブ２の径方向の変位を阻止する為に、上記内輪３の外周面を抑え片１４により抑え付けている。この様にハブ２を支持したならば、次いで、上記押型１５ａを使用して、上記ハブ２の内端部に形成した円筒部１０に対し、予備成形を行なう。   When the preforming and the main forming are performed using such a pressing die 15a, first, as shown in FIGS. The outer ring 4 and the plurality of rolling elements 5 and 5 are assembled. Next, the hub 2 is supported by the molding machine in a state where displacement in each direction is prevented. In the illustrated example, in order to prevent displacement of the hub 2 in the axial direction, the hub 2 is placed on the upper surface of the support base 18 with the outer end portion of the hub 2 facing downward. In addition, in order to prevent the radial displacement of the hub 2, the outer peripheral surface of the inner ring 3 is held down by a holding piece 14. If the hub 2 is supported in this way, the preform 15a is then used to preform the cylindrical portion 10 formed at the inner end of the hub 2.

予備成形では、先ず、図１に示す様に、上記ハブ２の中心軸Ｘに対する上記押型１５ａの中心軸Ｙの傾斜角度θ（図３参照）を０度にした状態で（これら両中心軸Ｘ、Ｙ同士を互いに一致させた状態で）、上記凸部１６ａの先端部を上記円筒部１０の内側に挿入する事により、この凸部１６ａの中間部外周面を上記円筒部１０の先端部内周面（内周面の先端縁）に、全周に亙り当接させる。この状態で、本例の場合には、この当接部に引いた接線γと上記ハブ２の中心軸Ｘとのなす角度α／２が、この当接部の全周に亙って等しくなる様に、且つ、この当接部の直径方向反対側の２個所位置に引いた接線γ、γ同士のなす角度αが、６０〜１７０度の範囲に収まる様に、上記押型１５ａの形状及び寸法を規制している。但し、本発明を実施する場合、上記角度αは、少なくとも１度≦α≦１７９度の範囲に収まる様にすれば良い。   In the preforming, first, as shown in FIG. 1, the inclination angle θ (see FIG. 3) of the central axis Y of the pressing die 15a with respect to the central axis X of the hub 2 is set to 0 degree (both the central axes X , In a state where Ys are aligned with each other), by inserting the tip end portion of the convex portion 16a into the inside of the cylindrical portion 10, the outer peripheral surface of the intermediate portion of the convex portion 16a is the inner periphery of the tip portion of the cylindrical portion 10 The entire surface is brought into contact with the surface (the leading edge of the inner peripheral surface). In this state, in this example, the angle α / 2 formed between the tangent line γ drawn at the contact portion and the central axis X of the hub 2 is equal over the entire circumference of the contact portion. In addition, the shape and dimensions of the pressing die 15a so that the angle α formed between the tangents γ and γ drawn at two positions on the diametrically opposite side of the contact portion falls within the range of 60 to 170 degrees. Is regulated. However, when the present invention is carried out, the angle α should be at least within a range of 1 ° ≦ α ≦ 179 °.

上述の様に円筒部１０の先端部内周面の全周に対して凸部１６ａの中間部外周面を当接させたならば、次いで、前記成形機を構成する油圧シリンダにより、上記押型１５ａを軸方向下方に強く押圧する。これにより、図１に示す様に、上記凸部１６ａの外周面から上記円筒部１０の先端部内周面に力（上記ハブ２の中心軸Ｘを基準とする径方向成分Ｆr を持った力）Ｆを、全周に亙り均一に付加しつつ、図２に示す様に、上記凸部１６ａを上記円筒部１０の内側に押し込む。これにより、同図に示す様に、上記円筒部１０の先端部を径方向外方に所定量だけ塑性変形させて、上記中心軸Ｘに対するこの円筒部１０の先端部内周面の傾斜角度を所定量（例えば１〜３０度程度。好ましくは１０〜３０度程度。）だけ大きくする。この様に、この際の傾斜角度を１〜３０度程度（好ましくは１０〜３０度程度）とする理由は、先ず、この傾斜角度を１度よりも小さくすると、後述する予備成形による効果を十分に得られなくなる（この効果を十分に得る為には、上記傾斜角度を１０度以上とするのが好ましい）為である。又、上記傾斜角度を３０度より大きくすると、予備成形を行なうのに必要な押圧力が大きくなり、この押圧力を発生させる為の巨大な設備が必要となってコストが嵩むだけでなく、上記円筒部１０の先端部内周面と上記押型１５ａの先端面（上記凸部１６ａの外周面及び上記凹部１７ａの内面）との当接部の面圧が過大となり、この押型１５ａの先端面が損傷し易くなる為である。 If the intermediate part outer peripheral surface of the convex part 16a is brought into contact with the entire periphery of the inner peripheral surface of the tip part of the cylindrical part 10 as described above, the pressing die 15a is then moved by the hydraulic cylinder constituting the molding machine. Press strongly downward in the axial direction. As a result, as shown in FIG. 1, a force (a force having a radial component F r with respect to the central axis X of the hub 2) is applied from the outer peripheral surface of the convex portion 16a to the inner peripheral surface of the tip portion of the cylindrical portion 10. ) While F is uniformly applied over the entire circumference, the convex portion 16a is pushed into the cylindrical portion 10 as shown in FIG. As a result, as shown in the figure, the distal end portion of the cylindrical portion 10 is plastically deformed radially outward by a predetermined amount, and the inclination angle of the inner peripheral surface of the distal end portion of the cylindrical portion 10 with respect to the central axis X is determined. Increasing by a fixed amount (for example, about 1 to 30 degrees, preferably about 10 to 30 degrees). Thus, the reason for setting the inclination angle at this time to about 1 to 30 degrees (preferably about 10 to 30 degrees) is that if the inclination angle is first made smaller than 1 degree, the effect of the preforming described later is sufficient. (To obtain this effect sufficiently, it is preferable to set the tilt angle to 10 degrees or more). Further, if the inclination angle is larger than 30 degrees, the pressing force required to perform the pre-forming increases, and not only the huge equipment for generating the pressing force is required, but the cost is increased. The contact pressure between the inner peripheral surface of the tip of the cylindrical portion 10 and the tip surface of the pressing die 15a (the outer peripheral surface of the convex portion 16a and the inner surface of the concave portion 17a) becomes excessive, and the tip surface of the pressing die 15a is damaged. It is because it becomes easy to do.

尚、上記力Ｆは、上記凸部１６ａの外周面から上記円筒部１０の先端部内周面に加わる押圧力（これら外周面と内周面との当接部に引いた接線γに垂直な力）と、この当接部に加わる摩擦力（上記接線γに平行な力）との合力である。上述した様に、この力Ｆは、上記円筒部１０の先端部内周面に対し、全周に亙り均一に付加される。従って、この力Ｆの径方向成分（上記ハブ２を径方向に変位させようとする力）Ｆr は、上記円筒部１０の全周で相殺されてゼロになる。尚、実際には、上記ハブ２及び上記押型１５ａの偏心誤差や、上記当接部に作用する摩擦力のばらつき等により、上記力Ｆが円周方向に関して均一にならない（ばらつく）場合がある。但し、この様な場合でも、上記力Ｆの径方向成分Ｆr は、その大部分が相殺される為、上記ハブ２に付加される径方向の力を問題が生じない程度（実際上、無視できる程度）にまで小さく抑える事ができる。 The force F is a pressing force applied from the outer peripheral surface of the convex portion 16a to the inner peripheral surface of the tip portion of the cylindrical portion 10 (a force perpendicular to a tangent γ drawn to a contact portion between the outer peripheral surface and the inner peripheral surface. ) And a frictional force applied to the contact portion (a force parallel to the tangent γ). As described above, this force F is uniformly applied over the entire circumference with respect to the inner peripheral surface of the tip of the cylindrical portion 10. Accordingly, the radial component of the force F (the force for displacing the hub 2 in the radial direction) F r is canceled out over the entire circumference of the cylindrical portion 10 and becomes zero. Actually, the force F may not be uniform (varied) in the circumferential direction due to an eccentric error of the hub 2 and the pressing die 15a, variation of frictional force acting on the contact portion, or the like. However, even in such a case, most of the radial component F r of the force F cancels out, so that the radial force applied to the hub 2 does not cause a problem (in practice, ignored). To the extent possible).

尚、上述した様な予備成形は、これを多く行なう程、次述する本成形の際に、上記ハブ２に加わる径方向の力を小さくできる。但し、図２に示す様に、上記円筒部１０の先端部内周面が上記押型１５ａの先端面に形成した凹部１７ａの底部に当接した状態から、更に予備成形を続行すると、押圧力が大きくなり、この当接部に作用する面圧が過大となる。この結果、上記押型１５ａの先端面が損傷し易くなると言った不都合を生じる。この為、本例の場合には、上記予備成形を、図２に示す様に上記円筒部１０の先端部内周面が上記凹部１７ａの底部に当接するまで（若しくは当接する直前まで）行ない、その後、次述する本成形を行なう様にしている。   In addition, the more the preforming as described above is performed, the smaller the radial force applied to the hub 2 during the main forming described below. However, as shown in FIG. 2, if the preforming is further continued from the state in which the inner peripheral surface of the cylindrical portion 10 is in contact with the bottom of the concave portion 17a formed on the distal end surface of the pressing die 15a, the pressing force increases. Therefore, the surface pressure acting on the contact portion becomes excessive. As a result, there arises a disadvantage that the tip surface of the pressing die 15a is easily damaged. Therefore, in the case of this example, the preforming is performed until the inner peripheral surface of the tip of the cylindrical portion 10 abuts on the bottom of the recess 17a (or just before the abutment) as shown in FIG. The main molding described below is performed.

予備成形が完了したならば、次いで、本成形を行なう。本例の場合、この本成形は、前述した従来技術の場合と同様、上記円筒部１０に対してローリングプレス加工を施す事により行なう。この為に、先ず、図２に示した状態から、一度、上記押型１５ａを上昇させ、上記ハブ２の中心軸Ｘに対するこの押型１５ａの中心軸Ｙの傾斜角度θを、１〜３５度の範囲の値に設定する。そして、この状態で、上記押型１５ａを下降させる事により、この押型１５ａの先端面の円周方向一部を、上記円筒部１０の先端部内周面の円周方向一部に当接させる。そして、この状態で、前記油圧シリンダにより上記押型１５ａを上記ハブ２の軸方向下方に向け強く押圧しつつ、この押型１５ａをこのハブ２の中心軸Ｘを中心として回転（傾斜角度θで揺動回転）させる。これにより、この押型１５ａの先端面から上記円筒部１０の先端部内周面の円周方向一部に押圧力を、この押圧力の作用点を円周方向に移動させながら付加する。そして、上記円筒部１０の先端部を更に径方向外方に塑性変形させる事で、前記かしめ部１１を形成する。尚、上述の様な押型１５ａを使用してローリングプレス加工を行なう場合、一般的には、この押型１５ａの揺動回転速度を１０〜２５００min-1 の範囲で設定するが、本例の場合には、５０〜６００min-1 の低速度範囲で設定する様にしている。 When the preforming is completed, the main molding is then performed. In the case of this example, this main forming is performed by performing a rolling press process on the cylindrical portion 10 as in the case of the above-described prior art. For this purpose, first, from the state shown in FIG. 2, the pressing die 15a is once raised, and the inclination angle θ of the central axis Y of the pressing die 15a with respect to the central axis X of the hub 2 is in the range of 1 to 35 degrees. Set to the value of. In this state, by lowering the pressing die 15a, a part of the tip end surface of the pressing die 15a in the circumferential direction is brought into contact with a part of the tip portion inner peripheral surface of the cylindrical portion 10 in the circumferential direction. In this state, while pressing the pressing die 15a strongly downward in the axial direction of the hub 2 by the hydraulic cylinder, the pressing die 15a is rotated about the central axis X of the hub 2 (oscillated at an inclination angle θ). Rotate). Accordingly, a pressing force is applied from the tip surface of the pressing die 15a to a part of the inner peripheral surface of the tip portion of the cylindrical portion 10 in the circumferential direction while moving the point of action of the pressing force in the circumferential direction. Then, the caulking portion 11 is formed by further plastically deforming the distal end portion of the cylindrical portion 10 radially outward. In the case of performing rolling press processing using the above-described pressing die 15a, generally, the rocking rotation speed of the pressing die 15a is set within a range of 10 to 2500 min -1. Is set in a low speed range of 50 to 600 min −1 .

上述した様に、本成形を行なう際には、上記押型１５ａの先端面から上記円筒部１０の先端部内周面の円周方向一部に押圧力を、この押圧力の作用点を円周方向に移動させながら付加する為、上記ハブ２の中心軸Ｘを基準とするこの押圧力の径方向成分（このハブ２を径方向に変位させようとする力）が相殺されてゼロになる事はない。但し、上記本成形は、前記予備成形を行なった後、即ち、上記ハブ２の中心軸Ｘに対する上記円筒部１０の先端部内周面の傾斜角度を或る程度大きくした状態で行なう。又、上記押圧力の径方向成分は、上記ハブ２の中心軸Ｘに対する上記円筒部１０の先端部内周面の傾斜角度が大きくなる程小さくなる。従って、上記本成形を行なう際には、上記押圧力の径方向成分を小さく抑える事ができる。   As described above, when performing the main molding, a pressing force is applied from the tip surface of the pressing die 15a to a part of the inner peripheral surface of the tip portion of the cylindrical portion 10 in the circumferential direction, and the point of action of the pressing force is set in the circumferential direction. Therefore, the radial component of the pressing force with respect to the central axis X of the hub 2 (the force for displacing the hub 2 in the radial direction) is canceled and becomes zero. Absent. However, the main molding is performed after the preliminary molding, that is, in a state where the inclination angle of the inner peripheral surface of the tip of the cylindrical portion 10 with respect to the central axis X of the hub 2 is increased to some extent. Further, the radial component of the pressing force decreases as the inclination angle of the inner peripheral surface of the distal end portion of the cylindrical portion 10 with respect to the central axis X of the hub 2 increases. Therefore, when performing the main molding, the radial component of the pressing force can be kept small.

次に、図４は、上述した予備成形と本成形とを行なう際の、前記油圧シリンダ（上記押型１５ａに押圧力を付与する押圧装置）内の油圧の変化を示している。図中の（Ａ）〜（Ｌ）部は、それぞれ以下の状態を示している。   Next, FIG. 4 shows a change in hydraulic pressure in the hydraulic cylinder (a pressing device that applies a pressing force to the pressing die 15a) when performing the above-described preforming and main forming. Parts (A) to (L) in the figure show the following states, respectively.

＜予備成形＞
（Ａ）部：予備成形開始前の停止状態。油圧ゼロ。
（Ｂ）部：油圧が上昇し、上記円筒部１０の上方に配置した押型１５ａ（傾斜角度θ＝０度）が、この円筒部１０に向けて下降する。
（Ｃ）部：上記押型１５ａの先端面が上記円筒部１０の先端部内周面に当接し、油圧が大幅に上昇する。当接時の衝撃により、油圧が設定値｛次述する（Ｄ）部の油圧｝よりも高くなっている。
（Ｄ）部：上記押型１５ａを構成する凸部１６ａが上記円筒部１０の内側に押し込まれ、この円筒部１０の先端部が径方向外方に塑性変形する。この際の上記押型１５ａの軸方向押圧力は５０〜２００ｋＮ程度であり、その保持時間は０．１〜２sec 程度である。
（Ｅ）部：ここで予備成形が終了する。 <Preliminary molding>
(A) part: Stop state before the start of preforming. Zero hydraulic pressure.
Part (B): The hydraulic pressure rises, and the pressing die 15 a (inclination angle θ = 0 degree) arranged above the cylindrical part 10 descends toward the cylindrical part 10.
Part (C): The tip surface of the pressing die 15a comes into contact with the inner peripheral surface of the tip part of the cylindrical part 10, and the hydraulic pressure is significantly increased. Due to the impact at the time of contact, the hydraulic pressure is higher than the set value {hydraulic pressure of (D) portion described below}.
(D) part: The convex part 16a which comprises the said pressing die 15a is pushed inside the said cylindrical part 10, and the front-end | tip part of this cylindrical part 10 is plastically deformed to radial direction outward. The axial pressing force of the pressing die 15a at this time is about 50 to 200 kN, and the holding time is about 0.1 to 2 seconds.
Part (E): Preliminary forming ends here.

＜本成形＞
（Ｆ）部：上記押型１５ａが上昇し、油圧が低下する。この状態で、この押型１５ａの傾斜角度θが、１〜３５度の範囲の値に設定される。
（Ｇ）部：上記押型１５ａが下降する事により、この押型１５ａの先端面の円周方向一部が上記円筒部１０の先端部内周面の円周方向一部に当接し、油圧が大幅に上昇する。当接時の衝撃により、油圧が設定値｛次述する（Ｈ）部の油圧｝よりも高くなっている。
（Ｈ）部：上記押型１５ａによるローリングプレス加工が行なわれ、上記円筒部１０の先端部が更に径方向外方に塑性変形する。この円筒部１０の先端部外周面が前記内輪３の表面に当接するまでの間、油圧は一定である。
（Ｉ）部：上記円筒部１０の先端部外周面が上記内輪３の表面に当接する事に伴い、油圧が少しだけ上昇する。この際の油圧の保持時間は、０．５〜１５秒程度である。
（Ｊ）部：ここで本成形が終了する。
（Ｋ）部：上記押型１５ａが上昇し、油圧が低下する。
（Ｌ）部：本成形終了後の停止状態。油圧ゼロ。 <Main molding>
Part (F): The pressing die 15a is raised and the hydraulic pressure is lowered. In this state, the inclination angle θ of the pressing die 15a is set to a value in the range of 1 to 35 degrees.
Part (G): When the pressing die 15a is lowered, a portion of the tip surface of the pressing die 15a in the circumferential direction comes into contact with a portion of the inner peripheral surface of the tip portion of the cylindrical portion 10 in the circumferential direction. To rise. Due to the impact at the time of contact, the hydraulic pressure is higher than the set value {hydraulic pressure of (H) portion described below}.
Part (H): Rolling press work is performed by the pressing die 15a, and the tip of the cylindrical part 10 is further plastically deformed radially outward. The hydraulic pressure is constant until the outer peripheral surface of the tip of the cylindrical portion 10 contacts the surface of the inner ring 3.
Part (I): The hydraulic pressure slightly increases as the tip outer peripheral surface of the cylindrical part 10 comes into contact with the surface of the inner ring 3. The oil pressure holding time at this time is about 0.5 to 15 seconds.
Part (J): The main forming ends here.
Part (K): The pressing die 15a is raised and the hydraulic pressure is lowered.
(L) part: Stop state after completion of main forming. Zero hydraulic pressure.

上述した様な本例の車輪支持用ハブユニットの製造方法の場合には、前述した様に、予備成形と本成形とを行なう際に、それぞれハブ２に加わる径方向の力を小さくする事ができる。従って、成形機を構成する、上記ハブ２の支持構造の剛性を小さくする事ができ、この成形機の低廉化を図れる。   In the case of the manufacturing method of the wheel supporting hub unit of the present example as described above, the radial force applied to the hub 2 may be reduced during the preliminary molding and the main molding as described above. it can. Therefore, the rigidity of the support structure of the hub 2 constituting the molding machine can be reduced, and the cost of the molding machine can be reduced.

又、本例の場合、予備成形を行なう際には、押型１５ａの先端面を上記円筒部１０の先端部内周面の全周に対して当接させる為、この当接部の面積を十分に確保できる。一方、本成形を行なう際には、上記押型１５ａの先端面を上記円筒部１０の先端部内周面の円周方向一部にのみ当接させるが、この本成形を行なう段階では、上記円筒部１０の先端部が或る程度径方向外方に塑性変形している事に伴い、この円筒部１０の先端部内周面の断面形状が上記押型１５ａの先端面の断面形状に近づいている（曲線状になっている）為、これら円筒部１０の先端部内周面と押型１５ａの先端面との当接部の面積を大きくする事ができる。従って、本例の場合には、上記かしめ部１１を形成する際に、上記円筒部１０の先端部内周面と上記押型１５ａの先端面との当接部の面圧を低く抑える事ができる。この結果、上記押型１５ａの先端面と上記かしめ部１１の表面とに損傷を生じにくくして、これら押型１５ａ及びかしめ部１１の寿命延長を図れる。   In the case of this example, when preforming, the tip surface of the pressing die 15a is brought into contact with the entire circumference of the inner peripheral surface of the tip portion of the cylindrical portion 10, so that the area of the contact portion is sufficiently large. It can be secured. On the other hand, when performing the main molding, the front end surface of the pressing die 15a is brought into contact with only a part of the inner peripheral surface of the front end portion of the cylindrical portion 10 in the circumferential direction. As the tip portion of 10 is plastically deformed radially outward to some extent, the cross-sectional shape of the inner peripheral surface of the tip portion of the cylindrical portion 10 approaches the cross-sectional shape of the tip surface of the pressing die 15a (curved line). Therefore, the area of the contact portion between the inner peripheral surface of the tip portion of the cylindrical portion 10 and the tip surface of the pressing die 15a can be increased. Therefore, in the case of this example, when the caulking portion 11 is formed, the surface pressure of the contact portion between the inner peripheral surface of the tip end portion of the cylindrical portion 10 and the tip end surface of the pressing die 15a can be suppressed low. As a result, the tip end surface of the pressing die 15a and the surface of the caulking portion 11 are hardly damaged, and the life of the pressing die 15a and the caulking portion 11 can be extended.

又、本例の場合には、予備成形と本成形とを、１台の成形機に組み付けた１個の押型１５ａを使用して行なう為、上記かしめ部１１の形成作業の能率化を図れる。   Further, in the case of this example, since the preliminary molding and the main molding are performed by using one pressing die 15a assembled to one molding machine, the efficiency of the forming operation of the caulking portion 11 can be improved.

尚、上述した実施例１では、予備成形を行なう為に、円筒部の先端部内周面に押圧力を、全周に亙り均一に付加した。但し、本発明を実施する場合、予備成形は、必ずしもこの様にして行なう必要はない。例えば、予備成形を行なう為に、上記円筒部の先端部内周面の円周方向等間隔となる複数個所にそれぞれ等しい押圧力を、これら各押圧力の作用点を円周方向に移動させながら付加する事により、上記円筒部の先端部を径方向外方に塑性変形させる事もできる。この様にして予備成形を行なう場合も、ハブの中心軸を基準とする上記各押圧力の径方向成分を相殺できる為、この予備成形時にこのハブを径方向に変位させようとする力が作用する事を防止できる。又、本発明を実施する場合、ローリングプレス加工機を２台用意し、一方のローリングプレス加工機（ハブの径方向に関する支持強度を十分に確保したもの）により予備成形を行ない、その後、他方のローリングプレス加工機（ハブの径方向に関する支持強度を低くした安価なもの）により本成形を行なう事もできる。   In Example 1 described above, in order to perform the preliminary molding, a pressing force was uniformly applied to the inner peripheral surface of the tip portion of the cylindrical portion over the entire circumference. However, when carrying out the present invention, the preforming is not necessarily performed in this way. For example, in order to perform preforming, the same pressing force is applied to a plurality of locations that are equally spaced in the circumferential direction on the inner peripheral surface of the tip of the cylindrical portion while moving the point of action of each pressing force in the circumferential direction. By doing so, the tip of the cylindrical portion can be plastically deformed radially outward. Even when preforming in this way, the radial component of each pressing force with respect to the central axis of the hub can be offset, so that a force is applied to radially displace the hub during the preforming. Can be prevented. When carrying out the present invention, two rolling press machines are prepared, and one of the rolling press machines (with sufficient support strength in the radial direction of the hub) is preformed, and then the other The main forming can also be performed by a rolling press machine (inexpensive one with low support strength in the radial direction of the hub).

尚、上述した実施例１では、本成形を行なう際の成形用治具の揺動回転速度を一定としたが、本発明を実施する場合、この揺動回転速度は、途中で変化させる事もできる。例えば、この揺動回転速度を、５０〜２００min-1 の範囲の値→２００〜４００min-1 の範囲の値→４００〜６００min-1 の範囲の値と段階的に大きくなる様に変化させたり、或は、４００〜６００min-1 の範囲の値→２００〜４００min-1 の範囲の値→５０〜２００min-1 の範囲の値と段階的に小さくなる様に変化させたり、更には、５０〜２００min-1 の範囲の値→４００〜６００min-1 の範囲の値→２００〜４００min-1 の範囲の値と言った様に変化させる事もできる。 In Example 1 described above, the rocking rotation speed of the forming jig when performing the main molding is constant. However, when the present invention is carried out, the rocking rotation speed may be changed midway. it can. For example, this rocking rotational speed, then the values stepwise larger change as the range of a range of values → 400~600min -1 values → 200~400min -1 ranging 50～200Min -1, Alternatively, or to values stepwise change as smaller range of the range of values → 50~200min -1 values → 200~400min -1 ranging 400～600Min -1, further, 50～200Min can also be varied as said that the value of the range of values → 200~400min -1 in the range of -1 in the range of value → 400~600min -1.

又、本成形を行なう際には、ハブの硬さやハブの内端部の寸法に応じて、上述した成形用治具の揺動回転速度の他、この成形用治具の傾斜角度、かしめ加工力、かしめ時間等をそれぞれ制御し、かしめ部による内輪の締結力や、この内輪の膨張量等が所定の規格内に収まる様にするのが好ましい。   In addition, when performing the main molding, depending on the hardness of the hub and the dimensions of the inner end of the hub, in addition to the rocking rotation speed of the molding jig described above, the inclination angle of the molding jig, and caulking It is preferable to control the force, the caulking time, and the like so that the fastening force of the inner ring by the caulking portion, the amount of expansion of the inner ring, and the like fall within predetermined standards.

又、本成形は、外輪を回転させつつ行なう事もできる。この様にして本成形を行なえば、かしめ部による内輪の押圧時に、内輪軌道及び外輪軌道と各転動体の転動面との当接部に圧痕が生じるのを有効に防止できる。   Moreover, this shaping | molding can also be performed, rotating an outer ring | wheel. If the main molding is performed in this manner, it is possible to effectively prevent indentation from being generated at the contact portion between the inner ring raceway and the outer ring raceway and the rolling surface of each rolling element when the inner ring is pressed by the caulking portion.

又、本発明を実施する場合、予備成形と本成形とは、それぞれ別々の成形用治具及び別々の成形機を使用して行なっても良い。又、予備成形は、同一又は異なる成形用治具を使用して、複数回に分けて行なっても良い。この様に予備成形と本成形とを別々の成形用治具により行なったり、或は予備成形を複数回に分けて行なうと、加工時間は長くなるが、１回の加工に必要な加工力を減少させる事ができ、成形用治具の寿命を長くする事ができる。   Moreover, when implementing this invention, you may perform a preforming and this shaping | molding using a separate shaping | molding jig | tool and a separate shaping | molding machine, respectively. Further, the preliminary molding may be performed in a plurality of times using the same or different molding jigs. In this way, if preforming and main forming are performed with separate molding jigs, or if preforming is performed in multiple steps, the processing time will be longer, but the processing force required for one processing will be increased. It can be reduced and the life of the forming jig can be extended.

又、本発明の製造方法は、上述した実施例１で示した車輪支持用ハブユニット１に限らず、軸部材の端部にかしめ部を形成する車輪支持用ハブユニットであれば、例えば前述の図８〜９に示した様な車輪支持用ハブユニット１ａ、１ｂ等に対しても実施可能である。   Further, the manufacturing method of the present invention is not limited to the wheel support hub unit 1 shown in the first embodiment described above, and may be any wheel support hub unit that forms a caulking portion at the end of the shaft member. The present invention can also be applied to the wheel supporting hub units 1a and 1b as shown in FIGS.

実施例１を、予備成形の初期段階で示す部分断面図。FIG. 2 is a partial cross-sectional view showing Example 1 in an initial stage of preforming. 同じく、予備成形の最終段階で示す断面図。Similarly, sectional drawing shown in the final stage of preforming. 同じく、本成形の段階で示す断面図。Similarly, sectional drawing shown in the stage of this shaping | molding. 予備成形と本成形とを行なう際の、油圧シリンダ内の油圧の大きさを示す線図。The diagram which shows the magnitude | size of the hydraulic pressure in a hydraulic cylinder at the time of performing a preforming and a main shaping | molding. 従来から知られている従動輪用の車輪支持用ハブユニットの第１例を示す断面図。Sectional drawing which shows the 1st example of the hub unit for wheel support for conventionally driven wheels. 従来のかしめ部の形成作業の初期段階を示す部分断面図。The fragmentary sectional view which shows the initial stage of the formation operation | work of the conventional crimping part. 同じく、終期段階を示す部分断面図。Similarly, the fragmentary sectional view which shows the last stage. 従来から知られている従動輪用の車輪支持用ハブユニットの第２例を示す断面図。Sectional drawing which shows the 2nd example of the hub unit for wheel support for driven wheels conventionally known. 同じく駆動輪用の車輪支持用ハブユニットの１例を示す断面図。Sectional drawing which similarly shows one example of the hub unit for wheel support for drive wheels.

符号の説明Explanation of symbols

１、１ａ、１ｂ 車輪支持用ハブユニット
２、２ａ ハブ
３ 内輪
４、４ａ 外輪
５ 転動体
６ フランジ
７ａ、７ｂ 内輪軌道
８ 小径段部
９ 段差面
１０ 円筒部
１１ かしめ部
１２ 取付部
１３ａ、１３ｂ 外輪軌道
１４ 抑え片
１５、１５ａ 押型
１６、１６ａ 凸部
１７、１７ａ 凹部
１８ 支持台
１９ 軸部材
２０ スプライン孔 DESCRIPTION OF SYMBOLS 1, 1a, 1b Wheel support hub unit 2, 2a Hub 3 Inner ring 4, 4a Outer ring 5 Rolling element 6 Flange 7a, 7b Inner ring raceway 8 Small diameter step part 9 Step surface 10 Cylindrical part 11 Caulking part 12 Mounting part 13a, 13b Outer ring Track 14 Retaining piece 15, 15a Stamping die 16, 16a Convex part 17, 17a Concave part 18 Support base 19 Shaft member 20 Spline hole

Claims (5)

軸部材の一端部に設けた小径段部に内輪を外嵌し、更にこの内輪を、この軸部材の一端部に設けた円筒部のうちこの内輪の一端面から突出した先端部を径方向外方に塑性変形させて形成したかしめ部により、上記小径段部の基端部に存在する段差面に向け抑え付けている車輪支持用ハブユニットの製造方法であって、上記円筒部の先端部を径方向外方に所定量だけ塑性変形させる事に伴い、上記軸部材の中心軸に対するこの先端部内周面の傾斜角度を所定量だけ大きくする予備成形を行なった後、この先端部内周面の一部に押圧力を、この押圧力の作用点を円周方向に移動させながら付加する事により、上記先端部を更に径方向外方に塑性変形させて上記かしめ部を形成する本成形を行なう、車輪支持用ハブユニットの製造方法。   An inner ring is externally fitted to a small-diameter step provided at one end of the shaft member, and the inner ring is further radially outwardly protruded from one end surface of the inner ring of the cylindrical portion provided at one end of the shaft member. A hub unit for supporting a wheel that is restrained toward a step surface existing at a base end portion of the small-diameter step portion by a caulking portion formed by plastic deformation in the direction, wherein the tip end portion of the cylindrical portion is Along with the plastic deformation by a predetermined amount in the radially outward direction, after preforming to increase the inclination angle of the tip inner peripheral surface with respect to the central axis of the shaft member by a predetermined amount, By applying a pressing force to the part while moving the point of action of the pressing force in the circumferential direction, the tip part is further plastically deformed radially outward to form the caulking part. Manufacturing method of wheel supporting hub unit. 予備成形を行なう為、円筒部の先端部内周面に押圧力を、全周に亙って均一に付加する事により、この先端部を径方向外方に所定量だけ塑性変形させる、請求項１に記載した車輪支持用ハブユニットの製造方法。   2. To perform preforming, the tip is plastically deformed radially outward by a predetermined amount by uniformly applying a pressing force to the inner peripheral surface of the tip of the cylindrical portion over the entire circumference. The manufacturing method of the hub unit for wheel support described in 2. 予備成形を行なう為、その外径寸法が軸方向基端側に向かう程大きくなる成形用治具の外周面を、軸部材の一端部に設けた円筒部の先端部内周面に全周に亙り当接させた状態で、上記成形用治具をこの円筒部の内側に押し込む事により、この成形用治具の外周面からこの円筒部の先端部内周面に押圧力を、全周に亙って均一に付加する事で、この先端部を径方向外方に所定量だけ塑性変形させる、請求項１〜２の何れかに記載した車輪支持用ハブユニットの製造方法。   In order to perform preforming, the outer peripheral surface of the molding jig whose outer diameter increases toward the proximal end in the axial direction is spread over the entire inner periphery of the tip of the cylindrical portion provided at one end of the shaft member. When the molding jig is pushed inside the cylindrical portion in the contact state, a pressing force is applied from the outer peripheral surface of the molding jig to the inner peripheral surface of the tip of the cylindrical portion over the entire circumference. The method for manufacturing the wheel supporting hub unit according to claim 1, wherein the tip end portion is plastically deformed by a predetermined amount radially outward by adding uniformly. 予備成形と本成形とを、これら各成形を行なう為の成形用治具を組み付け可能な１台の成形機を使用して行なう、請求項１〜３の何れかに記載した車輪支持用ハブユニットの製造方法。   The hub unit for supporting a wheel according to any one of claims 1 to 3, wherein the preforming and the main molding are performed using a single molding machine capable of assembling a molding jig for performing each molding. Manufacturing method. 予備成形と本成形とで、１個の成形用治具を共用する、請求項４に記載した車輪支持用ハブユニットの製造方法。
The manufacturing method of the wheel support hub unit according to claim 4, wherein one preforming jig is shared between the preforming and the main forming.
JP2003275101A 2003-07-16 2003-07-16 Method of manufacturing wheel supporting hub unit Pending JP2005036905A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007192289A (en) * 2006-01-19 2007-08-02 Ntn Corp Bearing device for wheel and method of manufacturing it
JP2008190692A (en) * 2007-02-07 2008-08-21 Nsk Ltd Method for manufacturing bearing device
WO2009139137A1 (en) * 2008-05-13 2009-11-19 Ntn株式会社 Method for forming a wheel bearing device
US7874734B2 (en) 2005-06-02 2011-01-25 Ntn Corporation Wheel support bearing assembly
US7883272B2 (en) 2004-10-08 2011-02-08 Ntn Corporation Wheel support bearing assembly
US8221004B2 (en) 2007-01-17 2012-07-17 Ntn Corporation Method of making wheel support bearing
US8745874B2 (en) 2005-12-05 2014-06-10 Ntn Corporation Method of manufacturing wheel support bearing assembly
DE102013210317A1 (en) * 2013-06-04 2014-12-04 Schaeffler Technologies Gmbh & Co. Kg Wheel bearing with radial stabilizing ring
EP3059027A4 (en) * 2013-10-17 2017-08-09 NSK Ltd. Method for producing wheel-supporting roller bearing unit
EP3306125A4 (en) * 2015-06-05 2019-01-23 NSK Ltd. Manufacturing method for rolling bearing units for wheel support

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7883272B2 (en) 2004-10-08 2011-02-08 Ntn Corporation Wheel support bearing assembly
US7874734B2 (en) 2005-06-02 2011-01-25 Ntn Corporation Wheel support bearing assembly
US8745874B2 (en) 2005-12-05 2014-06-10 Ntn Corporation Method of manufacturing wheel support bearing assembly
JP2007192289A (en) * 2006-01-19 2007-08-02 Ntn Corp Bearing device for wheel and method of manufacturing it
US8221004B2 (en) 2007-01-17 2012-07-17 Ntn Corporation Method of making wheel support bearing
JP4552951B2 (en) * 2007-02-07 2010-09-29 日本精工株式会社 Manufacturing method of bearing device
JP2008190692A (en) * 2007-02-07 2008-08-21 Nsk Ltd Method for manufacturing bearing device
JP2009274515A (en) * 2008-05-13 2009-11-26 Ntn Corp Method for machining wheel bearing device
WO2009139137A1 (en) * 2008-05-13 2009-11-19 Ntn株式会社 Method for forming a wheel bearing device
US8631581B2 (en) 2008-05-13 2014-01-21 Ntn Corporation Method for forming a wheel bearing apparatus
DE102013210317A1 (en) * 2013-06-04 2014-12-04 Schaeffler Technologies Gmbh & Co. Kg Wheel bearing with radial stabilizing ring
EP3059027A4 (en) * 2013-10-17 2017-08-09 NSK Ltd. Method for producing wheel-supporting roller bearing unit
US10286727B2 (en) 2013-10-17 2019-05-14 Nsk Ltd. Method for producing wheel-supporting roller bearing unit
EP3306125A4 (en) * 2015-06-05 2019-01-23 NSK Ltd. Manufacturing method for rolling bearing units for wheel support
US10746230B2 (en) 2015-06-05 2020-08-18 Nsk Ltd. Manufacturing method for rolling bearing units for wheel support

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