JP4781716B2 - Manufacturing method of wheel bearing device - Google Patents

Description

The present invention relates to a wheel bearing equipment manufacturing method for supporting a wheel of an automobile or the like, in particular, the manufacture of wheel bearing equipment which suppresses the occurrence of brake judder to enhance the surface runout accuracy of the wheel mounting flange Regarding the method.

  In general, the braking force has increased due to the widespread use of disc brakes. On the other hand, when braking is performed with the disc brake rotor held between brake pads, vibration occurs especially when the vehicle is running at low speed, causing low frequency unpleasant noise. There are things to do. Such a phenomenon is called a brake judder, and in recent years, this analysis and improvement have attracted attention as a new technical issue as the performance and silence of vehicles become higher.

  The exact mechanism of the brake judder has not yet been elucidated in detail, but one factor is the accuracy of the pad sliding contact surface of the brake rotor. As for this runout accuracy, not only the runout accuracy of the brake rotor alone, but also the surface runout accuracy of the wheel mounting flange to which the brake rotor is mounted, the axial runout of the rolling bearing, the accuracy of the rolling surface, the assembly accuracy of the rolling bearing, etc. are accumulated. Ultimately, it appears as the surface runout accuracy on the side of the brake rotor.

  Also, in recent years, it goes without saying that the cost has been reduced, and by pursuing weight reduction in order to improve fuel efficiency, the wheel bearing device has been slimmed down by eliminating excess material, and the wheels for steering stability. The rigidity of the bearing device for use has been increased. Various measures for the above-mentioned surface runout accuracy of the side surface of the brake rotor are taken while satisfying the requirements that contradict each other.

FIG. 6 shows a conventional wheel bearing device, in which (a) is a side view and (b) is a longitudinal sectional view thereof. In the following description, the side closer to the outer side of the vehicle in the state assembled to the vehicle is referred to as the outboard side (left side in the drawing), and the side closer to the center is referred to as the inboard side (right side in the drawing).

  This wheel bearing device integrally has a wheel mounting flange 55 for attaching a wheel (not shown) to an end portion on the outboard side, an inner rolling surface 52a on the outboard side on the outer periphery, and the inner rolling surface. A hub wheel 52 having a small-diameter stepped portion 54 extending in the axial direction from the surface 52a, and an inner ring 53 press-fitted into the small-diameter stepped portion 54 of the hub wheel 52 and having an inboard-side inner rolling surface 53a formed on the outer periphery. The outer member 51 is integrally formed with a body mounting flange 61 for mounting to a vehicle body (not shown) on the outer periphery, and a double row rolling surfaces 60a and 60b are formed on the inner periphery. There are provided a member 60 and double row rolling elements (balls) 63, 63 which are equally distributed around the cages 62, 62 and accommodated between both rolling surfaces so as to roll freely. Further, hub bolts 56 for fixing the wheels are planted at the circumferentially equidistant positions of the wheel mounting flanges 55.

  Seals 64 and 65 are attached to both ends of the outer member 60 to seal the annular space between the outer member 60 and the inner member 51, and leakage of the lubricating grease enclosed in the bearing to the outside and from the outside Rain water and dust are prevented from entering the bearing.

  An annular groove 57 is formed on the side surface 55a of the wheel mounting flange 55 by primary cutting such as a lathe. Bolt holes 58 are formed at equal intervals in the center of the groove width of the annular groove 57. Further, after a knurl 56a formed on the outer diameter of the hub bolt 56 is press-fitted and fixed in the bolt hole 58, the side surface 55a is secondarily cut by a lathe or the like.

Thus, in the conventional wheel bearing device, since the annular groove 57 is formed in the side surface 55a, the influence of the deformation of the side surface 55a due to the press-fitting of the hub bolt 56 can be suppressed to the minimum. At the same time, since the side surface 55a is secondarily cut after the hub bolt 56 is press-fitted, the surface runout of the side surface 55a increased by the press-fitting of the hub bolt 56 can be suppressed as much as possible.
JP 2003-154801 A

  However, in the wheel bearing device described above, when a large moment load is applied to the wheel mounting flange 55 due to the vehicle turning or the like, the base of the wheel mounting flange 55, that is, between the wheel mounting flange 55 and the brake pilot portion 59. An alternating stress is repeatedly generated on the surface of the corner 59a. With respect to this alternating stress, the strength and durability of the wheel mounting flange 55 may be reduced due to the formation of the annular groove 57.

  On the other hand, it is conceivable to change the shape and dimensions of the wheel mounting flange 55 and simply increase the thickness and durability of the wheel mounting flange 55 by reducing the strength, thereby increasing the strength and durability of the wheel mounting flange 55. This goes against the trend of light weight and compactness in the market and is not a good measure for strength.

  Further, since the annular groove 57 is formed on the side surface of the wheel mounting flange 55, when the brake rotor and the wheel (not shown) are fastened by the hub bolt 56, the brake rotor itself may be deformed and the surface runout accuracy may deteriorate. .

The present invention has been made in view of such circumstances, and its object is to provide a method of manufacturing a bearing equipment wheel which suppresses the occurrence of brake judder to enhance the surface runout accuracy of the wheel mounting flange.

The method invention according to claim 1 includes an outer member having a double row outer raceway formed on the inner periphery, and a small-diameter step portion having a wheel mounting flange integrally formed at one end and extending in the axial direction on the outer periphery. And an inner ring member fitted to a small-diameter step portion of the hub ring, and a double row inner rolling surface facing the double row outer rolling surface is formed on the outer periphery. An inner member, and a double row rolling element that is rotatably accommodated between the rolling surfaces of the inner member and the outer member, and is evenly distributed along the circumferential direction of the wheel mounting flange. In the method of manufacturing a wheel bearing device in which a plurality of hub bolts are press-fitted, the portion of the wheel mounting flange that is deformed on the side surface on the outboard side and the absolute amount thereof are measured in advance by press-fitting the hub bolt, the portion to be deformed and the the absolute amount in terms of processing amount, and the information and the processing command value -Recording included in the NC machine, prior to press-fitting the hub bolts to the wheel mounting flange, the side surface of the outboard side is provided with a step to be machined.

Thus, in the method of manufacturing a wheel bearing device in which a plurality of hub bolts are press-fitted at equal intervals along the circumferential direction of the wheel mounting flange of the hub wheel, the side surface on the outboard side of the wheel mounting flange is preliminarily pressed by the hub bolt press-fitting. Measure the part to be deformed and its absolute amount, convert the part to be deformed and its absolute amount into the machining amount , record this information as a machining command value in the NC machine, and press the hub bolt into the wheel mounting flange. In addition, since the side surface on the outboard side is provided with a cutting process, it is not necessary to perform the cutting process while avoiding interference between the hub bolt and the cutting tool, and the cutting process becomes easy and the wheel mounting flange It is possible to provide a wheel bearing device in which occurrence of brake judder is suppressed by increasing surface runout accuracy.

According to a second aspect of the present invention, there is provided a Z-axis table in which the NC machine can move in the Z-axis direction, which is the longitudinal direction of the main shaft, and an X orthogonal to the Z-axis direction independently of the Z-axis table. An X-axis table movable in the axial direction; a slide block fixed to the X-axis table; a slider disposed so as to be reciprocally movable in the Z-axis direction of the slide block; And a headstock in which a motor for rotationally driving the main shaft is mounted, and the hub wheel is detachably fixed to a tip of the main shaft, and the tool is mounted on the outboard side of the wheel mounting flange by the cutting tool. A side surface is cut based on the processing command value, and a linear scale and a detector are provided in the moving range of the slider. The amount of movement is detected by the detector, the detected output signal is fed back to the control device, the control to bring the difference is reflected in the movement control of the next slider and turning information and the processing command value to zero Since the hub bolt is press-fitted into the wheel mounting flange, the side surface on the outboard side made of a non-axisymmetric aspheric surface can be machined with high accuracy in a short time based on the deformation amount obtained in advance. The surface runout accuracy of the mounting flange can be increased.

Furthermore, the cutting processing, as in the invention of claim 3, wherein the may be performed in the wheel hub itself, also, as in the invention according to claim 4, line after assembly of the wheel hub It may be broken.

The method for manufacturing a wheel bearing device according to the present invention includes an outer member having a double row outer raceway formed on the inner periphery, a wheel mounting flange at one end, and an axially extending outer periphery. A hub ring formed with a small-diameter step portion and an inner ring member fitted to the small-diameter step portion of the hub ring, and a double-row inner rolling surface facing the double-row outer rolling surface on the outer periphery. An inner member formed, and a double row rolling element that is rotatably accommodated between the rolling surfaces of the inner member and the outer member, and along the circumferential direction of the wheel mounting flange. In a method for manufacturing a wheel bearing device in which a plurality of hub bolts are press-fitted at equal intervals, a deformed portion of the side surface on the outboard side of the wheel mounting flange and its absolute amount are measured in advance by press-fitting the hub bolt, and the deformation is performed. converting the site and its absolute amount processing amount, the information pressurized Since there is a step of recording the command value into the NC processing machine and cutting the side face on the outboard side before press-fitting the hub bolt into the wheel mounting flange, interference between the hub bolt and the cutting tool Thus, there is no need to perform cutting while avoiding the above, and it is possible to provide a wheel bearing device in which the cutting is facilitated and the surface runout accuracy of the wheel mounting flange is increased to suppress the occurrence of brake judder.

An outer member having a double row outer raceway formed on the inner circumference, and a wheel mounting flange at one end, and one inner raceway facing the double row outer raceway on the outer circumference. A hub wheel formed with a cylindrical small-diameter step portion extending in the axial direction from the inner rolling surface, and press-fitted into the small-diameter step portion of the hub wheel, and opposed to the double-row outer rolling surface on the outer periphery. An inner member formed of an inner ring on which the other inner rolling surface is formed, and a double row rolling element that is rotatably accommodated between the inner member and the outer member, and the wheel mounting flange In the method of manufacturing a wheel bearing device in which a plurality of hub bolts are press-fitted at equal intervals along the circumferential direction of the wheel, a portion of the side surface on the outboard side of the wheel mounting flange deformed by press-fitting of the hub bolt and its absolute amount are preliminarily determined. measured, the site and its absolute amount of the deformation processing amount Calculated, and-recording included in NC processing machine of this information as a processing command value, prior to press-fitting the hub bolts to the wheel mounting flange, the side surface of the outboard side is provided with a step to be machined.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an embodiment of a wheel bearing device according to the present invention, FIG. 2A is a schematic view showing a state in which a hub bolt is press-fitted into a hub wheel, and FIG. FIG. 3 is a plan view showing an NC processing machine for turning a single hub wheel, and FIG. 4 is an explanatory view showing a manufacturing process of a wheel bearing device according to the present invention. .

  The wheel bearing device includes an inner member 1, an outer member 10, and double-row rolling elements (balls) 6 and 6. The inner member 1 includes a hub ring 2 and a separate inner ring 3, and the inner ring 3 is press-fitted into a cylindrical small-diameter step 2 b formed at the inboard side end of the hub ring 2. Further, an outer rolling surface 2 a on the outboard side is formed on the outer periphery of the hub wheel 2, and a serration (or spline) 2 c is formed on the inner periphery, and an inner rolling surface 3 a on the inboard side is formed on the outer periphery of the inner ring 3. Has been. Further, the hub wheel 2 has a wheel mounting flange 4 for mounting a wheel (not shown) integrally at the end portion on the outboard side, and the wheel mounting flange 4 is fixed at a circumferentially equidistant position. The hub bolt 5 is press-fitted.

  On the other hand, the outer member 10 integrally has a vehicle body mounting flange 10b to be attached to the vehicle body (not shown) on the outer periphery, and double row outer rolling surfaces 10a and 10a are formed on the inner periphery. Double row rolling elements 6 and 6 that are circumferentially arranged by retainers 7 and 7 between the outer rolling surfaces 10a and 10a of the double rows and the inner rolling surfaces 2a and 3a can roll freely. Contained.

  Seals 8 and 9 are attached to both ends of the outer member 10 to seal the annular space formed between the outer member 10 and the inner member 1, and leakage of lubricating grease enclosed in the bearing, Prevents rainwater and dust from entering the bearing from the outside.

  The hub wheel 2 is formed of medium carbon steel containing carbon of 0.40 to 0.80% by weight, such as S53C, and includes an inner rolling surface 2a, a seal land portion in which the seal 8 is in sliding contact, and a small diameter step portion 2b. The surface hardness is set to a range of 58 to 64 HRC by induction hardening. Such induction hardening improves the strength of the hub wheel 2 and suppresses fretting on the fitting surface of the inner ring 3 to improve durability.

  On the other hand, the inner ring 3 is made of high carbon chrome bearing steel such as SUJ2, and is hardened in the range of 58 to 64 HRC up to the core part by quenching. The outer member 10 is formed of medium carbon steel containing 0.40 to 0.80% by weight of carbon, such as S53C, like the hub wheel 2, and the double row outer raceway surfaces 10a and 10a are formed by induction hardening. The surface hardness is set in the range of 58 to 64 HRC.

  Here, the hub wheel 2 has a wheel mounting flange 4 and the outer peripheral surface formed into a predetermined shape and dimensions by primary turning after forging, and then is hardened by induction hardening to a predetermined portion. As shown in a), when the hub bolt 5 is press-fitted into the wheel mounting flange 4 of the hub wheel 2, the side surface 4a on the outboard side is deformed. Specifically, the space between the hub bolts 5 and 5 press-fitted at equal circumferential positions is curved to the outboard side (indicated by a two-dot chain line in the figure).

  In this embodiment, while measuring the deformation | transformation site | part of the side surface 4a by the side of the outboard in the wheel mounting flange 4, and its deformation amount beforehand, as shown in FIG.2 (b), the direction opposite to this deformation direction, ie, When the deformation that is convex on the outboard side is plus and the deformation that becomes concave is minus, the plus and minus are converted into a deformation amount (machining amount) obtained by reversing the plus and minus values, and these pieces of information will be described later. Is recorded in a desired shape and size by secondary cutting.

  As shown in FIG. 3, the NC processing machine 11 includes a Z-axis table 13 that can move in the Z-axis direction, which is the longitudinal direction of the main shaft 12, and an X that is orthogonal to the Z-axis direction independently of the Z-axis table 13. An X-axis table 14 that is movable in the axial direction is placed on the processing machine base 15. A headstock 16 is mounted on the Z-axis table 13, and the Z-axis table 13 is driven by a servo motor 17 attached to the processing machine base 15 to reciprocate in the Z-axis direction. The spindle stock 16 incorporates a motor 18 that rotationally drives the spindle 12. A chuck 19 is provided at the tip of the main shaft 12, and the hub wheel 2 (small diameter step portion 2 b) is held by the chuck 19.

  The X-axis table 14 movable in the X-axis direction is disposed at a position facing the hub wheel 2 gripped by the chuck 19 of the main shaft 12. A slide block 20 is fixed to the X-axis table 14, and a slider 21 is disposed on the slide block 20 so as to be capable of reciprocating in the Z-axis direction. A tool 23 is fixed to the slider 21 through a tool holder 22 so as to be replaceable.

  A linear scale and a detector (not shown) are provided in the movement range of the slider 21, and the amount of movement of the slider 21 relative to the slide block 20 is detected by the detector. The detected output signal is fed back to a control device (not shown) and reflected in the next movement control of the slider 21.

  The control device causes the hub wheel 2 to be turned by the cutting tool 23 fixed to the slider 21 based on a preset machining command value, and feeds back the turning information, thereby turning the machining information and the machining command value. Control to bring the difference of zero to zero. With such an NC processing machine 11, the deformation amount measured in advance of the wheel mounting flange 4 in the hub wheel 2, that is, the non-axisymmetric aspheric surface can be processed with high accuracy in a short time, and the surface runout accuracy of the wheel mounting flange 4 can be achieved. Thus, it is possible to provide a wheel bearing device in which the occurrence of brake judder is suppressed.

  And the surface runout of the side surface 4a on the outboard side in the wheel mounting flange 4 is regulated to 20 μm or less by this secondary cutting. Thereby, the surface runout accuracy of the side surface of the brake rotor can be suppressed to 50 μm or less, and the occurrence of brake judder can be suppressed. The secondary cutting is not limited to turning, and may be cutting by grinding.

Next, the manufacturing process of the wheel bearing device according to the present embodiment will be described with reference to FIG.
1. First, the hub wheel 2 is formed by hot forging a material made of medium carbon steel (a), and the outer periphery of the hub wheel 2 such as the wheel mounting flange 4, the inner rolling surface 2 a, and the small diameter step 2 b by turning. Serrations 2c are formed on the inner surface by broaching (b).
2. Bolt holes 4b into which the hub bolts 5 are press-fitted are formed at equal circumferential positions on the wheel mounting flange 4, and from the wheel mounting flange 4 to the inner raceway surface 2a and the small diameter step 2b from the seal land. Then, a curing process is performed by induction hardening (c).
3. In a state where the small-diameter step portion 2b is gripped by the chuck 19, the side surface 4a on the outboard side of the wheel mounting flange 4 is subjected to secondary cutting by the cutting tool 23 of the NC processing machine described above (d).
4). Thereafter, the seal land, the inner rolling surface 2a, and the small-diameter stepped portion 2b are simultaneously and integrally ground by the general-purpose grindstone 25 in a state where the end portion on the outboard side of the hub wheel 2 is supported (e).
5. A hub bolt 5 is press-fitted into a bolt hole 4b formed in the wheel mounting flange 4 (f). Finally, the inner ring 3 as well as the rolling element 6, the outer member 10 and the seals 8 and 9 are mounted on the hub ring 2. Assembly is completed (g).

  In the conventional wheel bearing device, since the side surface on the outboard side is secondarily cut after the hub bolt is press-fitted into the wheel mounting flange, the turning operation is performed while avoiding interference between the hub bolt and the cutting tool. Not only was it difficult, but the machining accuracy was limited. In contrast, in this embodiment, the amount of deformation due to press-fitting of the hub bolt 5 is measured in advance, and the amount of deformation is recorded as a machining command value in the NC processing machine, and before the hub bolt 5 is press-fitted into the wheel mounting flange 4, Since the side surface 4a is secondarily cut, processing accuracy such as surface runout is greatly improved.

  In this embodiment, the side surface 4a on the outboard side of the wheel mounting flange 4 is preliminarily cut with the hub wheel 2 alone, and the side surface 4a on the outboard side is secondarily cut after induction hardening. However, the present invention is not limited to such an embodiment. For example, the hub wheel 2 alone is preliminarily subjected to primary cutting on the side surface 4a on the outboard side, which includes rough turning and intermediate finishing turning, and the hub bolt 5 is press-fitted. You may perform secondary cutting (finish turning) before doing. Alternatively, the forging surface may be left without performing the primary turning, and cutting (finish turning) may be performed before the hub bolt 5 is press-fitted. That is, the number of cutting operations is not limited, and any cutting may be performed before the hub bolt 5 is press-fitted.

  Here, the method of secondary cutting the side surface 4a on the outboard side of the wheel mounting flange 4 in the state of the hub wheel 2 alone has been described. However, the present invention is not limited to this, and as shown in FIG. After assembling, so-called assembly turning in which the wheel mounting flange 4 of the hub wheel 2 is subjected to secondary cutting may be applied. Here, the same parts and parts as those described above are denoted by the same reference numerals, and redundant description is omitted.

  Here, a headstock 16 and a chuck 24 are placed on the Z-axis table 13, and the Z-axis table 13 is driven by a servo motor attached to a processing machine base (not shown) to reciprocate in the Z-axis direction. The outer member 10 is gripped by the chuck 24. In addition, a motor (not shown) that rotates the spindle 26 is incorporated in the spindle stock 16. A serration 26 a that engages a serration 2 c formed on the inner periphery of the hub wheel 2 is provided at the tip of the main shaft 26, and the hub wheel 2 is driven to rotate with respect to the outer member 10 held by the chuck 24. The

  Since the turning of the side surface 4a on the outboard side of the wheel mounting flange 4 is performed by assembly turning using the cutting tool 23 fixed to the slider 21, the surface runout accuracy of the wheel mounting flange to which the brake rotor is mounted, that is, The surface runout accuracy generated by accumulating the axial runout of the rolling bearing, the accuracy of the rolling surface, the assembly accuracy of the rolling bearing, and the like can be suppressed to a predetermined value. Further, it is not necessary to pour a cutting fluid into the wheel mounting flange 4, so that so-called dry processing can be performed, and the shavings generated during the processing become a continuous thread shape, so that it does not scatter around. Therefore, foreign matters such as cutting fluid and shavings do not enter the apparatus and the durability is not impaired.

  Although the embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and is merely an example. For example, an outer ring rotation having a wheel mounting flange on an outer member. Of course, it may be of a type and can be implemented in various forms without departing from the gist of the present invention. The scope of the present invention is defined by the terms of the claims, and includes the equivalent meanings of the claims and all modifications within the scope.

A method for manufacturing a wheel bearing device according to the present invention includes a hub wheel integrally having a wheel mounting flange for mounting a wheel at one end via a brake rotor, and a double-row rolling bearing that rotatably supports the wheel. The present invention can be applied to any structure of the first generation to the fourth generation including

It is a longitudinal section showing one embodiment of a wheel bearing device concerning the present invention. (A) is a schematic diagram which shows the state which press-fitted the hub bolt into the hub ring. (B) is a schematic diagram showing a hub wheel before press-fitting a hub bolt. It is the top view which carried out the cross section which shows a part which shows the NC processing machine which carries out the turning process of the hub wheel single-piece | unit. (A)-(g) is explanatory drawing which shows the manufacturing process of the wheel bearing apparatus which concerns on this invention. It is the principal part expanded view which carried out the cross section which shows the NC processing machine which carries out assembly turning of a hub wheel. The conventional bearing device for wheels is shown, (a) is a side view and (b) is the longitudinal section.

Explanation of symbols

1 .... inner member 2 .... hub wheels 2a, 3a ... inward rolling surface 2b ... ... Small diameter step 2c, 26a ... Serration 3 ... Inner ring 4 ... Wheel Mounting flange 4a ... Outboard side 4b ... Bolt hole 5 ... Hub bolt 6 ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling element 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Retainer 8, 9 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal 10 ・ ・ ・ ・ ・ ・ ・ ・... Outside member 10a ... Outer rolling surface 10b ... Car body mounting flange 11 ... NC processing machine 12, 26 ... main shaft 13 ... Z axis Table 14 ... X-axis table 15 ... Processing machine base 16 ... headstock 17 ... ·········· Servo motor 18 ············ motors 19 and 24 ······· chuck 20 ·······························・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Slider 22 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Holder 23 ・ ・ ・ ・ ・ ・ ・ ・ Byte 25 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Total Type grindstone 51 ·············································································・ ・ ・ ・ ・ ・ Inner ring 54 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Small diameter step 55 ・ ・ ・ ・ ・ ・ Wheel mounting flange 55a ・ ・ ・ ・ ・ ・ Side 56・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hubbol 56a ... Knurl part 57 ... Annular groove 58 ... Bolt hole 59 ... ... Brake pilot section 59a ... Corner 60 ... Outer member 60a ... Outer rolling surface 61・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Car body mounting flange 62 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Retainer 63 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling elements 64, 65 ···sticker

Claims (4)

An outer member having a double row outer raceway formed on the inner periphery;
A hub ring integrally having a wheel mounting flange at one end and an outer ring formed with a small-diameter step portion extending in the axial direction on the outer periphery, and an inner ring member fitted to the small-diameter step portion of the hub ring. An inner member formed with a double-row inner rolling surface facing the double-row outer rolling surface;
A double row rolling element housed in a freely rolling manner between the rolling surfaces of the inner member and the outer member;
In the manufacturing method of the wheel bearing device in which a plurality of hub bolts are press-fitted at equal intervals along the circumferential direction of the wheel mounting flange,
The part to be deformed and the absolute amount of the side surface on the outboard side of the wheel mounting flange is measured in advance by press-fitting the hub bolt, the deformed part and the absolute amount are converted into a machining amount, and this information is used as a machining command value. A method for manufacturing a wheel bearing device, comprising: a step of cutting a side surface on the outboard side before recording into an NC processing machine and press-fitting the hub bolt into the wheel mounting flange. A Z-axis table movable in the Z-axis direction, which is the longitudinal direction of the spindle, and an X-axis table movable in the X-axis direction perpendicular to the Z-axis direction independently of the Z-axis table; A slide block fixed to the X-axis table, a slider that is reciprocally movable in the Z-axis direction of the slide block, and a tool to which a cutting tool is fixed, is placed on the Z-axis table, and rotates the main shaft. The hub wheel is detachably fixed to the tip of the spindle, and the side surface on the outboard side of the wheel mounting flange is cut by the cutting tool based on the machining command value. In addition, a linear scale and a detector are provided in the movement range of the slider, and the amount of movement of the slider relative to the slide block is detected by the detector. Is, the detected output signal is fed back to the controller, claim and to perform control to bring the difference is reflected in the movement control of the next slider and turning information and the processing command value to zero 1 The manufacturing method of the wheel bearing apparatus as described in any one of. The method for manufacturing a wheel bearing device according to claim 1 or 2 , wherein the cutting is performed by the hub wheel alone. Method of manufacturing a wheel bearing device according to claim 1 or 2, wherein the cutting is performed after assembly of the wheel hub.

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