JP6101225B2 - Manufacturing method for vehicle wheel - Google Patents

Description

  The present invention relates to a method for manufacturing a vehicle wheel.

Conventionally, as a wheel having a Helmholtz resonator that silences tire air column resonance, a wheel that is formed in a rim so that a plurality of auxiliary air chambers are arranged in the circumferential direction of the wheel is known (for example, see Patent Document 1). ). By the way, the auxiliary air chamber of this wheel is formed by supporting and casting a plurality of cores in the mold along the circumferential direction of the rim at the time of casting the rim, and then crushing and taking out the cores from small holes made in the rim. Is formed.
By the way, in this wheel, since it is difficult to stably support each of the plurality of cores in the mold when casting the rim, the positions of the sub air chambers formed in the rim from the normal positions. There is a risk of shifting. Therefore, the conventional wheel (for example, refer to Patent Document 1) has a problem that the balance of the rim is uneven and the wheel balance is poor.
A wheel in which a sub air chamber is formed by an extrusion molding method is known (for example, see Patent Document 2). The auxiliary air chamber of the wheel is formed by an annular hollow space extending over the entire length of the rim within the rim.
According to this wheel, it is possible to avoid variations in the position of the auxiliary air chamber in the rim, and this wheel has excellent wheel balance.

JP 2005-271766 A JP 2008-126806 A

However, a wheel having a plurality of auxiliary air chambers as Helmholtz resonators in the circumferential direction of the wheel is desirable from the viewpoint of excellent silencing performance.
Accordingly, there is a demand for a vehicle wheel that has a hollow space over the entire length of the rim and has excellent wheel balance and noise reduction performance.

  Then, this invention makes it a subject to provide the manufacturing method of the wheel for vehicles which is excellent in a wheel balance while being excellent in a wheel balance.

  The present invention that has solved the above problems comprises a tire air chamber formed when a tire is attached to a rim, and a plurality of auxiliary air chambers that function as Helmholtz resonators and communicate with each other through a communication hole. Each of the chambers is a method for manufacturing a vehicle wheel formed by partitioning a hollow space formed inside the rim in a circumferential direction of the wheel by a partition member, and is formed in the rim that is long in one direction. A plate-like structure forming step for forming a plate-like structure having a hollow space having a cross-section corresponding to a cross-section in the rim width direction of the hollow space, and a plate surface of the plate-like structure. A communication hole forming step of forming the communication hole in the plate-like structure so as to penetrate through the hollow space, and a plurality of the partition members from the end in the longitudinal direction of the plate-like structure. Space A partition member inserting step of forming the auxiliary air chamber between the partition members, and the plate-like structure body so that the plate surface on which the communication hole is formed is on the outside And an end portion joining step for joining the end portions in the longitudinal direction of the plate-like structure.

In this manufacturing method, the vehicle wheel is formed by bending a plate-like structure having a hollow space having a cross section corresponding to a cross section in the rim width direction over the entire longitudinal direction. Therefore, according to this manufacturing method, unlike a conventional manufacturing method in which a core is cast to form a sub air chamber, a vehicle wheel having excellent wheel balance can be manufactured.
Further, in this manufacturing method, the auxiliary air chamber of the vehicle wheel is formed between a plurality of partition members inserted into the hollow space, and a plurality of auxiliary air chambers functioning as a Helmholtz resonator are formed in the circumferential direction of the wheel. Is done. Therefore, according to this manufacturing method, it is possible to produce a vehicle wheel that is excellent in silencing performance.

  Further, in such a method for manufacturing a vehicle wheel, the end portion joining step includes the end portion with the partition member interposed in the hollow space at the end portion in the longitudinal direction of the plate-like structure. It can also be set as the structure which joins each other.

  According to this manufacturing method, when joining the end portions in the longitudinal direction of the plate-like structures, the end portions are joined with the partition member interposed in the hollow space. The deformation of the end can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the wheel for vehicles which is excellent in wheel balance can be provided, having a some sub air chamber in the wheel circumferential direction.

It is a perspective view of the wheel for vehicles manufactured with the manufacturing method concerning the embodiment of the present invention, and is a figure containing the notch section which notched the rim partially in the wheel width direction. It is sectional drawing of the wheel for vehicles which concerns on embodiment of this invention, and is sectional drawing in alignment with the wheel circumferential direction of the rim | limb which forms hollow space. (A) to (c) is a manufacturing process explanatory diagram of a vehicle wheel according to an embodiment of the present invention. (A) to (c) is a manufacturing process explanatory diagram of a vehicle wheel according to an embodiment of the present invention. (A) And (b) is a manufacturing process explanatory view of the wheel for vehicles concerning other embodiments of the present invention.

Hereinafter, the manufacturing method of the wheel for vehicles concerning the embodiment of the present invention is explained.
First, after describing the vehicle wheel manufactured by this manufacturing method, the manufacturing method of this vehicle wheel is demonstrated.
The vehicle wheel is assumed to be made of a light metal such as aluminum, an aluminum alloy, and a magnesium alloy.

<Vehicle wheel>
FIG. 1 is a perspective view of a vehicle wheel 10 and includes a cut-out cross section in which a rim 11 is partially cut out in the wheel width direction Y. FIG. FIG. 2 is a cross-sectional view of the vehicle wheel 10, and is a cross-sectional view along the wheel circumferential direction X of the rim 11 that forms the hollow space 16. In FIG. 2, the tire T attached to the rim 11 is drawn with a virtual line (two-dot chain line).

As shown in FIG. 1, a vehicle wheel 10 according to this embodiment includes a rim 11 for mounting a tire T (see FIG. 2), and a disk 12 for connecting the rim 11 to a hub (not shown). And.
In FIG. 1, reference numeral 11 c is a well portion of the rim 11, reference numeral 13 is a sub air chamber, and reference numeral 16 is a hollow space. The auxiliary air chamber 13 is formed by partitioning the hollow space 16 as will be described later.

  The rim 11 includes bead seat portions 11a and 11a formed at both ends in the wheel width direction Y, rim flange portions 11b and 11b bent in an L shape outward from the bead seat portions 11a and 11a, and a bead. And a well portion 11c recessed inward in the wheel radial direction between the sheet portions 11a and 11a.

  A bead portion (not shown) of the tire T (see FIG. 2) is attached to the bead seat portion 11a. As a result, a tire air chamber 20 (see FIG. 2) formed of an annular sealed space is formed between the rim 11 and the inner peripheral surface of the tire T.

The well portion 11c is provided to drop a bead portion (not shown) of the tire T (see FIG. 2) when assembling the tire T to the rim 11.
The outer peripheral surface 11d of the rim 11 that defines the bottom surface of the well portion 11c is formed in a cylindrical shape having the same diameter in the wheel width direction Y.
In FIG. 1, reference numeral 14 denotes a communication hole, and reference numeral 17 denotes a partition member that is inserted into the hollow space 16.

As shown in FIG. 2, the vehicle wheel 10 includes a sub air chamber 13 inside the rim 11. The auxiliary air chamber 13 in the present embodiment is formed inside the wheel radial direction of the well portion 11c (see FIG. 1). That is, the auxiliary air chamber 13 is formed on the inner side in the wheel radial direction from the outer peripheral surface 11 d of the rim 11.
The auxiliary air chamber 13 is originally formed by providing an annular hollow space 16 formed along the wheel circumferential direction X in a portion that is a solid portion of the rim 11.

The auxiliary air chamber 13 is formed by partitioning an annular hollow space 16 formed inside the rim 11 with a partition member 17 in the wheel circumferential direction X.
The hollow space 16 in the present embodiment is formed integrally with the rim 11 when the rim 11 is manufactured by an extrusion method described later, and is formed in an annular shape over the entire circumference of the rim 11 in the wheel circumferential direction X. ing.

As described above, the auxiliary air chamber 13 in the present embodiment has the annular hollow space 16 partitioned at equal intervals by a plurality of partition members 17 (four in the present embodiment), and the wheel circumferential direction A plurality (four in this embodiment) of X are formed.
In addition, the number of the partition members 17 is not limited to four in this embodiment, but can be two or more according to the number of the sub air chambers 13 provided.

The partition member 17 is not particularly limited in shape, material, and the like as long as the sub-air chamber 13 having a predetermined volume can be partitioned (divided) in the hollow space 16 in an airtight manner.
Incidentally, the shape of the partition member 17 in the present embodiment has a substantially rectangular parallelepiped shape capable of hermetically sealing the inside of the hollow space 16, but is not limited thereto, and is matched to the cross section of the hollow space 16. Can be formed.
Examples of the material of the partition member 17 include a resin and a metal (for example, an aluminum alloy, a magnesium alloy, etc.) having the same material as the wheel base.

As shown in FIGS. 1 and 2, the communication hole 14 is a partition wall that separates the tire air chamber 20 (see FIG. 2) and the sub air chamber 13, that is, a rim 11 that defines an outer peripheral surface 11 d that is a bottom surface of the well portion 11 c. Formed by piercing the part.
The communication hole 14 constitutes a Helmholtz resonator together with the auxiliary air chamber 13 as described above.

  As shown in FIG. 2, the communication hole 14 is formed so as to communicate with a substantially central portion of each auxiliary air chamber 13 in the wheel circumferential direction X. Incidentally, the phase interval around the wheel center axis Ax in which the communication hole 14 in the present embodiment is formed is 90 degrees.

As shown in FIG. 1, the auxiliary air chamber 13 has a substantially rectangular shape in a cross-sectional view along the wheel width direction Y. The auxiliary air chamber 13 constitutes a Helmholtz resonator together with a communication hole 14 described in detail later.
In FIG. 2, reference numeral N denotes a seam in which the rim material 21 (see FIG. 4) is bent in an annular shape and the ends of the rim material 21 are aligned with each other in the vehicle wheel 10 manufacturing method described later. The reference numeral 17 a is a partition member that is disposed at the end of the rim material 21 among the four partition members 17 that are disposed in the hollow space 16.

<Method for manufacturing vehicle wheel>
Next, the manufacturing method of the vehicle wheel 10 (refer FIG. 1) which concerns on this embodiment is demonstrated. FIGS. 3A to 3C and FIGS. 4A to 4C are explanatory diagrams of the manufacturing process of the vehicle wheel 10.
3A is a perspective view of the rim material 21 manufactured by the extrusion molding method, FIG. 3B is a perspective view of the rim material 21 in which the communication holes 14 are formed, and FIG. 4 is a partially enlarged perspective view showing a state in which a partition member 17 is press-fitted into the hollow space 16 from the end of the rim material 21. FIG. 4A is a perspective view showing a state in which a plurality of partition members 17 are arranged at predetermined positions in the hollow space 16, and FIG. 4B shows the rim material 21 in the wheel circumferential direction X (see FIG. 1). ) Of the rim 11 (see FIG. 1) is schematically shown in a cross-sectional view, FIG. 4C is a cross-sectional view of the rim material 21 formed into a ring by roll processing.
Moreover, in FIG. 4A, the partition member 17 is indicated by a hide line (broken line). In FIG. 4B, the middle description of the rim material 21 is omitted for the sake of drawing.

The vehicle wheel 10 (see FIG. 1) according to the present embodiment can be manufactured using an extrusion molding method.
In this manufacturing method, the light metal billet constituting the wheel base material is extruded from a predetermined die (die) to form the rim material 21 shown in FIG.

The rim material 21 is formed of a plate-like member that has the same cross section as the cut-out cross section shown in FIG. 1 and is long in one direction, and corresponds to a “plate-like structure” in the claims.
In the rim material 21, a cross section corresponding to a cross section in the rim width direction (same as the wheel width direction Y in FIG. 1) of the hollow space 16 (see FIG. 1) formed in the rim 11 (see FIG. 1). The hollow space 16 is provided over the entire length.

  Next, in this manufacturing method, as shown in FIG. 3B, four communication holes 14a, communication holes 14b, communication holes 14c, and communication holes 14d are formed at equal intervals along the longitudinal direction of the rim material 21. The In the following description, these communication holes 14a to 14d are simply referred to as communication holes 14 when it is not necessary to distinguish them.

  Each communication hole 14 is formed by forming through holes at intervals according to the distance in the wheel circumferential direction X between the communication holes 14 shown in FIG. Incidentally, each communication hole 14 is formed in the center part of the rim width direction (same as the wheel width direction Y of FIG. 1).

In this manufacturing method, as shown in FIG. 3 (c), the partition member 17 is filled into the hollow space 16 of the rim material 21. The partition member 17 is press-fitted into the hollow space 16 from the end opening of the rim material 21.
As the partition member 17 in the present embodiment, a partition member having substantially the same cross-sectional shape as that of the hollow space 16 and having a slightly larger cross-section than the cross-section of the hollow space 16 can be used. Moreover, the material of the partition member 17 here assumes resin which can be elastically deformed.
In FIG. 3C, the symbol A represents the air flow described later.

As shown in FIG. 4A, the partition member 17 is formed between the communication hole 14a and the communication hole 14b, between the communication hole 14b and the communication hole 14c, and between the communication hole 14c and the communication hole 14d. Placed in place. At this time, the partition member 17 is disposed at an intermediate position between the communication holes 14.
The order in which the partition member 17 is press-fitted into a predetermined position is not particularly limited, and may be press-fitted into the hollow space 16 from one of two end openings of the rim material 21.
In addition, when one partition member 17 is press-fitted into a predetermined position and then another partition member 17 is press-fitted into a predetermined position, as shown in FIG. The air is pushed out through the communication hole 14. The arrow A in FIG.3 (c) has shown the flow of the air extruded.

Next, in this manufacturing method, as shown in FIG. 4B, the rim material 21 has a length corresponding to the entire circumference of the rim 11 (see FIG. 1) of the vehicle wheel 10 (see FIG. 1). It is truncated to M.
In FIG. 4 (b), reference numeral C is a cut portion of the rim material 21, reference numeral 14a is a communication hole corresponding to the communication hole 14a shown in FIG. 4 (a), and reference numeral 14d is FIG. ), The reference numeral 16 denotes a hollow space, and the reference numeral 17 denotes a partition member.

  Next, as shown in FIG. 4C, the rim material 21 is rolled and bent into an annular shape with the same curvature as the vehicle wheel 10 shown in FIG.

  Then, the seam N between the ends of the rim material 21 is welded by, for example, the TIG welding method so that the rim material 21 itself after welding partitions the hollow space 16 in the circumferential direction, and the rim shown in FIG. 11 is completed. That is, the partition is formed by welding while melting the rim material 21 itself that becomes the joint N. And the disk 12 (refer FIG. 1) is attached to this rim | limb 11, and a series of manufacturing processes of the vehicle wheel 10 (refer FIG. 1) which concern on this embodiment are complete | finished.

Next, the effect which the manufacturing method of the vehicle wheel 10 exhibits is demonstrated.
In this manufacturing method, the vehicle wheel 10 curves the rim material 21 (plate-like structure) having the hollow space 16 corresponding to the space in the cross section in the wheel width direction Y (rim width direction) over the entire longitudinal direction. Formed. Therefore, according to this manufacturing method, unlike the conventional manufacturing method in which the core is cast to form the auxiliary air chamber, the occurrence of bias in the meat portion of the rim 11 is avoided, and the vehicle wheel has excellent wheel balance. 10 can be produced.

  Further, in this manufacturing method, the auxiliary air chamber 13 of the vehicle wheel 10 is formed between the plurality of partition members 17 inserted into the hollow space 16, and the auxiliary air chamber 13 functioning as a Helmholtz resonator is A plurality are formed in the direction X. Therefore, according to this manufacturing method, it is possible to produce a vehicle wheel that is excellent in silencing performance.

  Further, according to this manufacturing method, the auxiliary air chamber is formed in the rim 11 by an extrusion method simpler than the conventional manufacturing method (for example, see Patent Document 1) in which the core is cast into a mold to form the auxiliary air chamber. 13 can be formed.

  In this manufacturing method, when the plurality of partition members 17 are sequentially press-fitted into the hollow space 16, the air existing between the partition members 17 in the hollow space 16 is shown in FIG. It is pushed out through the communication hole 14 as shown by the arrow A. Thereby, it is avoided that the air pressure between the partition members 17 increases with the press-fitting of the partition members 17 into the hollow space 16. Therefore, the partition member 17 previously arranged in the hollow space 16 is prevented from being inadvertently displaced from a predetermined position due to pressure fluctuation. That is, according to this manufacturing method, it becomes easy to arrange the partition member 17 at a target position.

As mentioned above, although this embodiment was described, this invention is not limited to the said embodiment, It can implement with a various form.
In the above-described embodiment, the rim material 21 is bent into an annular shape by roll processing, and then the partition is formed by welding while melting the rim material 21 itself that becomes the joint N. When bending in an annular shape, the joint N can be welded after the partition member 17 is disposed in the hollow space 16 in the joint N between the ends of the rim material 21.
According to this manufacturing method, when the end portions in the longitudinal direction of the rim material 21 (plate-like structure) are joined, the end portions are joined to each other with the partition member 17 interposed in the hollow space 16. The deformation of the end portion of the rim material 21 at the time can be prevented.

Moreover, in the said embodiment, although the partition member 17 is arrange | positioned in the total three places between each communication hole 14 from the communication hole 14a to the communication hole 14d (refer Fig.4 (a)), the partition member 17 is the same. It can also be arranged in a total of five locations.
FIGS. 5A and 5B are explanatory diagrams of the manufacturing process of the vehicle wheel 10 according to another embodiment of the present invention.

As shown in FIG. 5 (a), in the manufacturing method according to another embodiment here, in addition to the partition members 17 arranged at three locations shown in FIG. 4 (a), both end portions of the rim material 21 are provided. The partition member 17b and the partition 17c are also arranged at two places. The material of the partition members 17b and 17c here is assumed to be the same elastically deformable resin as the other three partition members 17.
And although not shown in figure, after that, the rim material 21 is the length M (refer FIG.4 (b)) according to the length of the perimeter of the rim | limb 11 (refer FIG.1) of the vehicle wheel 10 (refer FIG.1). Truncated to

Next, as shown in FIG. 5B, the rim material 21 is rolled and bent into an annular shape with the same curvature as the vehicle wheel 10 shown in FIG. And the rim | limb material 21 completes the rim | limb 11 by welding the joint line N of the edge parts of the rim | limb material 21 by TIG welding method etc., for example.
5A and 5B, reference numeral 13 denotes a sub-air chamber, reference numerals 14a to 14d correspond to reference numerals 14a to 14d in FIG. 3B, and reference numeral 16 denotes It is a hollow space.

  Incidentally, the phase interval around the wheel center axis Ax of the communication hole 14 in the rim 11 is set to 90 degrees, which is the same as in the above embodiment. Further, as shown in FIG. 5B, the partition members 17b and 17c are arranged at predetermined positions so that the hollow space 16a remains between the partition member 17b and the partition member 17c.

  According to such a manufacturing method, when TIG welding or the like is performed on the joint N, the distance from the joint N to the partition members 17b and 17c can be earned, so that the welding heat is transmitted to the partition members 17b and 17c. hard. Thereby, the same resin as the material of the other three partition members 17 can be used for the material of the partition members 17b and 17c.

In addition, by arranging the partition members 17b and 17c apart from the joint N, the volume of the sub air chamber 13 that communicates with the communication hole 14a and the sub air chamber that communicates with the communication hole 14d are the other two sub air chambers. It becomes smaller than the volume of the chamber 13.
Therefore, the cross-sectional areas of the communication hole 14 a and the communication hole 14 d are corrected based on the resonance vibration frequency f ₀ of the Helmholtz resonator represented by the following formula (1) according to the decrease in the volume of the auxiliary air chamber 13. .

f ₀ = C / 2π × √ (S / V (L + α × √S)) Equation (1)

C (m / s): sound velocity inside the auxiliary air chamber (= sound velocity inside the tire air chamber)
V (m ³ ): Volume of auxiliary air chamber L (m): Length of communication hole S (m ² ): Cross-sectional area of communication hole α: Correction coefficient

  Moreover, in the said embodiment, although the rim material 21 is formed by the extrusion molding method, the rim material 21 can also be formed by the casting method in this invention.

DESCRIPTION OF SYMBOLS 10 Vehicle wheel 11 Rim 13 Sub air chamber 14 Communication hole 14a Communication hole 14b Communication hole 14c Communication hole 14d Communication hole 16 Hollow space 17 Partition member 17a Partition member 17b Partition member 17c Partition member 20 Tire air chamber 21 Rim material (plate) Structure)
Y Wheel width direction X Wheel circumferential direction T Tire

Claims (2)

A plurality of auxiliary air chambers that function as Helmholtz resonators and communicate with each other through a communication hole and a tire air chamber formed when a tire is attached to the rim, and each of the plurality of auxiliary air chambers is provided inside the rim. A vehicle wheel manufacturing method formed by partitioning a hollow space formed in a wheel circumferential direction by a partition member,
A plate-like structure forming step of forming a plate-like structure that is long in one direction and has a hollow space having a cross section corresponding to a cross section in the rim width direction of the hollow space formed in the rim over the entire length direction. When,
A communication hole forming step of forming the communication hole in the plate-like structure so as to penetrate from the plate surface of the plate-like structure toward the hollow space;
Inserting a plurality of the partition members into the hollow space from the end in the longitudinal direction of the plate-like structure, and forming the auxiliary air chamber that communicates with the communication hole between the partition members Process,
A bending step of bending the plate-like structure annularly so that the plate surface on which the communication hole is formed is on the outside;
An end joining step for joining ends in the longitudinal direction of the plate-like structure; and
A method for manufacturing a vehicle wheel, comprising: In the manufacturing method of the wheel for vehicles according to claim 1,
In the manufacturing process of the vehicle wheel, the end portion joining step joins the end portions to each other with the partition member interposed in the hollow space at the end portion in the longitudinal direction of the plate-like structure. Method.

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