KR101529866B1 - A light weight wheel manufacturing method using the undercut forming - Google Patents

A light weight wheel manufacturing method using the undercut forming Download PDF

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Publication number
KR101529866B1
KR101529866B1 KR1020140033837A KR20140033837A KR101529866B1 KR 101529866 B1 KR101529866 B1 KR 101529866B1 KR 1020140033837 A KR1020140033837 A KR 1020140033837A KR 20140033837 A KR20140033837 A KR 20140033837A KR 101529866 B1 KR101529866 B1 KR 101529866B1
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KR
South Korea
Prior art keywords
preform
rim
mandrel
roller
undercut
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KR1020140033837A
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Korean (ko)
Inventor
승현창
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핸즈코퍼레이션주식회사
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Priority to KR1020140033837A priority Critical patent/KR101529866B1/en
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Publication of KR101529866B1 publication Critical patent/KR101529866B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/18—Spinning using tools guided to produce the required profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a lightweight wheel manufacturing method using undercut forming for manufacturing a wheel by flow forming using a mandrel, a tailstock and a roller, and a method of manufacturing a lightweight wheel using a hub having a lug hole formed therein, A preform manufacturing step of fabricating the preform, wherein the inner diameter of the rim is larger than the outer diameter of the mandrel; Placing the lower surface of the preform on the upper surface of the mandrel so as to form an empty space between the rim of the preform and the outer diameter of the mandrel, and then rotating and operating the upper part of the preform under pressure; And a shaping step of gradually forming an inner surface of the rim adjacent to the spokes so that the inner surface of the rim of the preform is closely contacted with the outer diameter of the mandrel using a horizontally rotating roller, The ribs constituting the plurality of projections are integrally formed on the inner upper part of the rim and the projections of the rib integrally formed with the rim when the preform is seated on the mandrel are closely contacted with the outer periphery of the mandrel And an empty space is formed between the protrusions.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a light weight wheel manufacturing method using an undercut forming method,

More particularly, the present invention relates to a method of manufacturing a lightweight wheel using undercut forming, and more particularly, to a method of manufacturing a lightweight wheel using undercut forming, wherein a rim inner diameter of a preform is made larger than an outer diameter of a mandrel to form an empty space between the preform and the mandrel, Since the undercut can be formed only in the upper part of the inner side, it is possible to shorten the manufacturing time by omitting the post-processing step for cutting out the material, and it is possible to reduce the production cost by reducing the amount of raw material input, The present invention relates to a method of manufacturing a lightweight wheel using undercut forming capable of reducing the weight of a wheel manufactured through the above method.

Generally, automobile wheels are made of a rubber material, which is filled with air or nitrogen, and are joined to a wheel of a metal material so as to be firmly attached to an axle. Especially in recent years, And an aluminum wheel having excellent cooling efficiency is in the spotlight.

Such an aluminum wheel typically forms a hub that is coupled to an axle at a central portion of one side of a cylindrical rim to which the tire is coupled, so that the tire is firmly fixed to the vehicle.

In addition, the chassis component of the vehicle has a close relationship with the performance of the vehicle. When the weight of the chassis component is reduced by 1 kg when the vehicle is traveling, the load applied to the suspension of the vehicle is usually reduced by about 15 kg Accordingly, various researches and developments have been made to reduce the weight of the chassis components.

As a part of such research and development, a technique for reducing the weight of a wheel by forming a hollow in the spoke or rim portion of the wheel is disclosed in the Japanese Patent Application Laid-Open No. 10-1998-018993 and in Japanese Patent Application Laid- 0022221 ", published patent application "10-2006-0044653" and registered patent publication No. 10-0460655.

However, the conventional techniques developed for reducing the weight of the wheel have a problem in that cavities for removing molding sand should be formed since hollows should be formed inside the spokes or rims, and even if the cavities are formed, There was a problem that was not easy.

On the other hand, in order to reduce the weight of the wheel, a technique of forming an undercut on the inner surface of the rim portion by further constructing a slide core in the interior of the casting machine has been developed. This technique is disclosed in Japanese Patent Application Laid-Open No. 2000-24769 And a tie-cast molding method using the tie casting method.

However, in the conventional die casting method having an undercut shape, in order to form an undercut in the rim portion of the preform, it is necessary to provide a push-out port having a predetermined undercut shape on a part of the movable core, And a cylinder or the like which makes it possible to move in parallel in the direction of extrusion of the pin. Thus, the structure is complicated, and it is difficult to form the preform accurately in a desired shape by a complicated structure.

Therefore, the present applicant has developed a lightweight wheel manufacturing method using undercut forming that can easily manufacture a lightweight wheel without additional post-processing.

In the present invention, the rim inner diameter of the preform is made larger than the outer diameter of the mandrel to form an empty space between the preform and the mandrel, and an undercut is formed only in the inner upper portion of the rim during the flow forming process. It is possible to shorten the manufacturing time by omitting it, to reduce the production cost by reducing the amount of raw material input, and to manufacture a lightweight wheel using undercut forming capable of reducing the weight of the wheel manufactured through the inner space by undercut The purpose is to provide a method.

According to an aspect of the present invention, there is provided a method of manufacturing a preform, the method comprising: preparing a preform having a hub, a spoke, and a rim having a lug hole formed through a casting process, the inner diameter of the rim being larger than the outer diameter of the mandrel; Placing the lower surface of the preform on the upper surface of the mandrel so as to form an empty space between the rim of the preform and the outer diameter of the mandrel, and then rotating and operating the upper part of the preform under pressure; And a shaping step of gradually forming an inner surface of the rim adjacent to the spokes so that the inner surface of the rim of the preform is closely contacted with the outer diameter of the mandrel using a horizontally rotating roller, The ribs constituting the plurality of projections are integrally formed on the inner upper part of the rim and the projections of the rib integrally formed with the rim when the preform is seated on the mandrel are closely contacted with the outer periphery of the mandrel And a hollow space is formed between the protrusions. The present invention provides a lightweight wheel manufacturing method using undercut forming.

In the lightweight wheel manufacturing method using the undercut forming method of the present invention, the inner diameter of the rim of the preform is made larger than the outer diameter of the mandrel to form an empty space between the preform and the mandrel. So that it is possible to shorten the manufacturing time by omitting the post-processing step for cutting out the material, reduce the production cost by reducing the amount of raw material input, Lt; RTI ID = 0.0 > weight reduction. ≪ / RTI >

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing a lightweight wheel manufacturing method using undercut forming of the present invention. FIG.
2 is a schematic view showing a preform manufactured through a preform manufacturing step of the present invention;
FIG. 3 is a schematic view showing a state in which a preform having integrally formed ribs constituting protrusions of the present invention is seated on a mandrel and pressed and fixed through a tailstock.
4 is a sectional view taken along line AA in Fig.
Fig. 5 is a schematic view showing a shape preparation step of the present invention. Fig.
6 is a schematic view showing a state in which the pressure support member presses the spoke of the preform in the shaping processing step of the present invention.
7 is a schematic view showing a state in which the pressure support is sandwiched in the lug hole according to the operation of the pressure-sensitive bar in the shaping processing step of the present invention.
8 is a schematic view showing a state in which a knockout ring constructed in a mandrel of the present invention is fixedly coupled to a main body;
9 is a schematic view showing the shaping step of the present invention.
10 is a flowchart showing the shape processing steps of the present invention in steps;
11 is a schematic view showing the shape machining step of Fig. 10;
12 is a schematic view showing a light weight wheel manufactured through the present invention;

Hereinafter, the structure of the present invention will be described.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a lightweight wheel using under-cut forming in which a molded preform is flow-formed using a mandrel, a tail pad, and a roller, (S10) for manufacturing a preform (10) composed of a spindle (5) and a rim (7), wherein the inner diameter of the rim (7) is made larger than the outer diameter of the mandrel The bottom surface of the preform 10 is placed on the upper surface of the mandrel 20 so that the void space 30 is formed between the rim 7 of the preform 10 and the outer diameter of the mandrel 20, (20) of the preform (10) by using a roller (50) rotating horizontally, and a shaping processing step (S20) of rotating the preform (10) So as to form an undercut 9 on the inner upper side of the rim 7 adjacent to the spoke 5, And an excavating step (S30).

A rib 7b constituting a plurality of projections 7a is integrally formed on the inner upper side of the rim 7 in the preform 10 to be cast in the preform manufacturing step S10, The projections 7a of the ribs 7b integrally formed with the rim 7 are brought into close contact with the outer periphery of the mandrel 20 when the preform 10 is mounted on the mandrel 20 in step S20, And an empty space 30 is formed between the first and second substrates.

A protruding portion 41 and a pressing protector 43 protruding downward are formed in the lower portion of the tailstock 40 so as to press the preforms 10 in the shaping preparation step S20, 40) is pressed and fixed to the preform (10).

The pressurizing support 43 is configured to be fitted in the lug hole 1 formed in the hub 3 so as to prevent the movement of the preform 10 which rotates.

The shaping step S30 includes a roller initial entry step S31 in which the roller 50 is gradually moved in the direction of the rim 7 to form an undercut 9 on the inside upper side of the rim 7 An undercut contour completion step (S32) for increasing the physical properties of a portion where the undercut 9 is formed by moving the roller 50 up and down; (S33) of completing a forming operation.

Further, in the shaping step S30, the roller 50 is arranged in parallel with the horizontal line and rotates horizontally.

Hereinafter, a method of forming an undercut 9 in the rim 7 through flow forming after casting the present invention will be described in detail with reference to the drawings.

First, as shown in FIGS. 1 to 5, a preform 10 composed of a hub 3, a spoke 5, and a rim 7 having a lug hole 1 formed through a conventional casting machine (not shown) The inner diameter of the rim 7 of the preform 10 is formed to be larger than the outer diameter of the mandrel 20 for seating the preform 10 for flow forming. )

Since the rim 7 of the preform 20 can be improved in mechanical properties by shaping through flow forming, it is possible to increase the mechanical properties of the portions of the hub 3 and the spokes 5, It is preferable that the preform 10 is produced.

In addition, the preform 10 manufactured through conventional low-pressure and gravity casting is subjected to turning before flow forming to form a deformation preventing tuck (not shown) which is in close contact with the mandrel 20 inside the rim 7 The present invention is characterized in that the inner diameter of the rim 7 of the preform 10 is formed larger than the outer diameter of the mandrel 20 to form an empty space 30 between the rim 7 and the mandrel 20 It is possible to omit the turning process of forming the deformation preventing jaws on the rim 7, thereby reducing the amount of raw materials consumed in the preform 10, as well as shortening the working time.

3 to 4, in the preform 10 to be cast in the preform manufacturing step S10, a ring-shaped rib 7b having a plurality of protrusions 7a in the inside direction is formed in the preform 10, The rib 7b may be integrally formed on the inner upper side of the rim 7 constituting the preform 10 by casting the preform 10 so as to be integrally formed. The protrusion 7a of the rib 7b integrally formed with the rim 7 is brought into close contact with the outer periphery of the mandrel 20 when the preform 10 is seated in the mandrel 20 in step S20 The empty space 30 is formed between the protrusions 7a and the leads 7b and the mandrel 20 between the protrusions 7a to reduce the weight of the wheel 11 to be manufactured, The presser foot of the preform 10 through the tailstock 40 is fitted into the mandrel 20 in close contact with the outer periphery of the mandrel 20, There is certainly a more advantageous effects can be achieved.

It is preferable that the preform 10 is preheated before the shaping of the preform 10 so that the rim 7 of the preform 10 can be easily formed into a predetermined shape When the preform 10 is preheated in this manner, it is preferable that the preheat 10 be easily preheated by simultaneously preheating the mandrel 20 on which the preform 10 is placed.

After the preform 10 is manufactured through low-pressure and gravity casting as described above, the lower surface of the preform 10 is placed on the upper surface of the mandrel 20, so that the rim 7 of the preform 10 and the mandrel 20, A protruded fin 21 protruding upward is formed at the center of the mandrel 20 so that the center hole 10a formed at the center of the hub of the preform 10 Of the mandrel 20 is fitted into the projecting pin 21 of the mandrel 20, it is possible to easily mount the preform 10 on the seat.

After the preform 10 is placed on the mandrel 20 through the above process, the upper portion of the preform 10 is moved up and down using a tailstock 40 which is operated to move up and down through a normal elevating device The mandrel 20, the tailstock 40 and the preform 10 are rotated simultaneously through a normal rotation operation device (not shown) (S20). At the same time,

4 to 5, the hub 3 or the spokes 5 of the preform 10, that is, the pressurizing support 43 for pressurizing and supporting the design portion, is attached to the tailstock 40 It is preferable to prevent the movement of the preform 10 in the rotational operation and the shaping of the preform 10.

In other words, a ring-shaped protruding portion 41 is formed at the lower edge of the normal tailstock 40 so that only the upper edge of the preform 10 is pressed and fixed. In the present invention, in addition to the lower edge of the pressure- And a pressurizing support 43 protruding downward between the edges of the preform 10 so as to firmly press the preform 10 to be rotationally operated.

The presser foot is integrally formed with a conventional guide 42 formed at the center of the tailstock 40 to be engaged with the projecting pin 21 formed on the mandrel 20 so that the hub 3 may be configured to press the spokes 5 of the preform 10 by being disposed between the guide 42 and the projections 41. [

7, the pressurizing support 43 may be constructed so that the movement of the preform 10 is more firmly prevented. Such a configuration is advantageous in that the guide 42 is provided with a pressure So that the support 43 is fitted into the lug hole 1 formed in the hub 3 of the preform 10.

The preform 10 is pressed through the protruding portion 41 of the tailstock 40 and the pressurizing support 43 so that the pressurizing support 43 is inserted into the lug hole 1, The movement of the preform 10 and the external pressure exerted by the roller 50 during the rotation operation of the preform 10 can be suppressed, The movement of the preform 10 is effectively prevented.

When the pressure support 43 is fitted into the lug hole 1 as described above, the pressure support 43 is formed to be equal to the number of the lug holes 1 formed in the hub 3 However, it may be a structure that is formed in a number of two or more and can support a plurality of lug holes 1 of the hub 3.

8, the conventional mandrel 20 includes a main body 20a that rotates and a knock out ring 20b which is seated on the main body 20a and freely rotates. In the present invention, the knockout ring 20b is fixed to the main body 20a by the ordinary rotation preventing key 23 or the rotation preventing pin 25 so that the main body 20a and the knockout ring 20b rotate together .

That is, in the general forming, the inner circumference of the rim constituted by the preform is brought into close contact with the outer circumference of the mandrel so that the knockout ring does not have to rotate in the same manner as the main body. However, in the forming, Since the inner circumference of the mandrel 20 is spaced apart from the outer periphery of the mandrel 20, the chucking portion of the preform is floated. Therefore, in order to accurately transmit the rotational force of the main body 20a formed in the mandrel 20 to the preform 10, The knockout ring 20b is fixed to the main body 20a so that the preform 10, which is supported through the knockout ring 43, can receive a correct rotational force by the knockout ring 20b.

After the preparation of the shape processing is completed through the above process, the rim 7 of the preform 10 is progressively pressed inward from the outside to the inside by using the roller 50 which is rotated as shown in Fig. 9 , And the inner surface of the rim (7) is brought into close contact with the outer diameter of the mandrel (20).

The shaping of the rim 7 through the roller 50 is performed by rotating the roller 50 so that the undercut 9 can be formed in a ring shape on the inner upper side of the rim 7 adjacent to the spoke 5, The shape of the rim should be progressively formed in a state in which the rim 7 is arranged at a position slightly lower than the uppermost end of the rim 7, Since the remaining portions except the inner upper portion can be shaped, the empty space 30 is maintained only in the upper portion of the inside of the rim 7 which is not shaped, The undercut 9 is formed on the light-weight wheel 11 which has been subjected to the shape-processing by the motor 30 (S30)

The shape forming step S30 is a step of moving the roller 50 downward in each of the steps of progressively entering the roller 50 several times, that is, the shape of the rim 7 As shown in FIGS. 10 to 11, the shape processing step S30 may be performed in the initial stage of roller S31, the undercut contour completion step S32, , And a forming completion step (S33). In the following, the shape processing step (S30) will be described in more detail.

First, the roller initial entry step S31 is a step of moving the roller 50, which is rotating, from the outside to the inside of the rim 7 and progressively pressing the rim 7 from the outside to the inside, 7 to the outer diameter of the mandrel 20.

When the roller 50 advances in the inward direction of the rim 7 in order to improve the strength of the rim 7 in the portion where the undercut 9 is formed, It is preferable that the portion of the rim 7 formed to be bent by the undercut 9 be formed in a soft arc shape by gradually lowering the roller 50 every time.

In the undercut outer contour completion step S32, the upper portion of the rim 7 is subjected to a pressing process by moving the roller 50 up and re-pressed, thereby improving the physical properties and quality of the portion where the undercut 9 is formed .

The upward movement of the roller 50 is performed by the reverse operation of the roller initial entry step S31, that is, when the roller 50 is gradually moved upward, the roller 50 is gradually moved in the outward direction of the rim 7 It is preferable that the portion of the rim 7 in which the undercut 9 is formed is formed in a soft arc shape.

The forming completion step S33 is a step of lowering the upwardly moved roller to complete forming of the rim 7 and is performed slowly according to the shape of the rim 7 to be manufactured so that the rim 7 The forming of the rim 7 is completed by completing the forming at one time or by repeatedly forming it several times.

In the present invention, the shape forming step S30 is performed in the order of the roller initial entry step S31, the undercut outline complete step S32, and the forming completion step S33. However, The forming may be performed only in the initial entry step S31 and the forming completion step S33.

In addition, in the present invention, it is preferable that the roller 50 is arranged to be parallel to the horizontal surface and rotate horizontally. This is because when the roller 50 is inclined downward, the rollers 50 , The pressing operation of the rim 7 is not smoothly performed.

Therefore, in the present invention, it is preferable that the roller 50 is arranged horizontally and rotated in a horizontal direction so that the pressing process of the rim 7 due to the lifting operation of the roller 50 is smoothly performed.

After the completion of the shaping of the light weight wheel 11 as shown in FIG. 12 through the above-described process, finishing or finishing may be performed as necessary, .

As described above, according to the lightweight wheel manufacturing method using the undercut forming of the present invention, the weight of the wheel manufactured through the inner space by the undercut can be reduced and the post-processing for cutting the material is omitted The production time can be shortened, and the cost of production can be reduced because the amount of raw material is reduced.

1: lug hole 3: hub 5: spoke 7: rim 7a: projection 7b: rib 9:
10: preform 10a: center hole 11: lightweight wheel
20: mandrel 20a: main body 20b: knockout ring 21: projecting pin 23: rotation prevention key 25: rotation prevention pin 30: empty space
40: a tailstock 41: a projection 42: a guide 43:
50: Roller

Claims (6)

A method of manufacturing a wheel by flow-forming a cast preform using a mandrel and a tailstock and a roller,
A spoke 5 and a rim 7 having a lug hole 1 formed through casting are manufactured and the inner diameter of the rim 7 is set to the outer diameter of the mandrel 20 (S10);
The lower surface of the preform 10 is seated on the upper surface of the mandrel 20 so as to form an empty space 30 between the rim 7 of the preform 10 and the outer diameter of the mandrel 20, (S20) for pressing and rotating the upper part of the preform (10) while rotating it;
The inner surface of the rim 7 of the preform 10 is pressed and processed so as to be in close contact with the outer diameter of the mandrel 20 by using the roller 50 which is operated to rotate, And a shape machining step (S30) of forming an undercut (9)
Ribs 7b constituting a plurality of projections 7a are integrally formed on the inner upper portion of the rim 7 in the preform 10 cast and manufactured in the preform manufacturing step S10,
The protrusion 7a of the rib 7b integrally formed with the rim 7 when the preform 10 is mounted on the mandrel 20 is brought into close contact with the outer periphery of the mandrel 20 in the shaping preparation step S20 And a hollow space (30) is formed between the protrusions (7a) by the undercut forming method.
delete The press machine according to claim 1, wherein a protruding portion (41) for pressing and supporting the preform (10) and a presser foot (43) are protruded downward from the bottom of the tailstock (40)
Wherein the preform (10) is pressed and fixed by the tailstock (40) in the shaping preparation step (S20).
4. The undercut forming apparatus according to claim 3, wherein the pressurizing support (43) is configured to be fitted in a lug hole (1) formed in the hub (3) so as to prevent movement of the preform (10) Manufacturing method of lightweight wheel using.
2. The method according to claim 1, wherein the shaping step (S30)
A roller initial entry step (S31) of gradually moving the roller (50) in the direction of the rim (7) to form an undercut (9) on the inside upper side of the rim (7);
An undercut outer contour completion step (S32) for pressing the portion where the undercut (9) is formed by raising the entered roller (50);
And a forming completion step (S33) of completing the forming of the rim (7) by moving the upwardly moved roller (50) downward.
6. The method of manufacturing a lightweight wheel using undercut forming according to any one of claims 1 to 5, wherein the roller (50) is arranged in parallel with a horizontal line and rotated horizontally in the shape processing step (S30).
KR1020140033837A 2014-03-24 2014-03-24 A light weight wheel manufacturing method using the undercut forming KR101529866B1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101699242B1 (en) * 2015-08-10 2017-01-24 핸즈코퍼레이션주식회사 One-piece wheel manufacturing method without a hub
CN107378395A (en) * 2017-07-13 2017-11-24 芜湖西诺普汽车零部件科技有限公司 A kind of lift wheel spinning processing method
KR101805591B1 (en) * 2016-02-16 2017-12-06 (주)대유글로벌 Manufacturing device of wheel for vehicle
KR102057098B1 (en) * 2017-12-01 2019-12-30 주식회사 대유글로벌 High strength lightweight aluminum wheels using undercut
KR20210065020A (en) * 2019-11-26 2021-06-03 핸즈코퍼레이션주식회사 Horizontal Roller for Noise Reduction Hollow Portion Formation and Flow Forming and Manufacturing Method Using the Same
JP2022013538A (en) * 2020-06-29 2022-01-18 ヤマハ発動機株式会社 Manufacturing method of wheel for saddle-riding type vehicle

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JPS6478649A (en) * 1987-09-21 1989-03-24 Asahi Malleable Iron Co Ltd Production of wheel for automobile
JPS6478648A (en) * 1987-09-21 1989-03-24 Asahi Malleable Iron Co Ltd Production of wheel for automobile
JP2004074187A (en) * 2002-08-12 2004-03-11 Rays Foundry Co Ltd Method and device for manufacturing wheel

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS6478649A (en) * 1987-09-21 1989-03-24 Asahi Malleable Iron Co Ltd Production of wheel for automobile
JPS6478648A (en) * 1987-09-21 1989-03-24 Asahi Malleable Iron Co Ltd Production of wheel for automobile
JP2004074187A (en) * 2002-08-12 2004-03-11 Rays Foundry Co Ltd Method and device for manufacturing wheel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101699242B1 (en) * 2015-08-10 2017-01-24 핸즈코퍼레이션주식회사 One-piece wheel manufacturing method without a hub
WO2017026628A1 (en) * 2015-08-10 2017-02-16 핸즈코퍼레이션 주식회사 Hubless one-piece wheel and manufacturing method therefor
US10913307B2 (en) 2015-08-10 2021-02-09 Hands Corporation Ltd. Hubless one-piece wheel and manufacturing method therefor
KR101805591B1 (en) * 2016-02-16 2017-12-06 (주)대유글로벌 Manufacturing device of wheel for vehicle
CN107378395A (en) * 2017-07-13 2017-11-24 芜湖西诺普汽车零部件科技有限公司 A kind of lift wheel spinning processing method
KR102057098B1 (en) * 2017-12-01 2019-12-30 주식회사 대유글로벌 High strength lightweight aluminum wheels using undercut
KR20210065020A (en) * 2019-11-26 2021-06-03 핸즈코퍼레이션주식회사 Horizontal Roller for Noise Reduction Hollow Portion Formation and Flow Forming and Manufacturing Method Using the Same
KR102446931B1 (en) * 2019-11-26 2022-09-23 핸즈코퍼레이션 주식회사 Horizontal Roller for Noise Reduction Hollow Portion Formation and Flow Forming and Manufacturing Method Using the Same
JP2022013538A (en) * 2020-06-29 2022-01-18 ヤマハ発動機株式会社 Manufacturing method of wheel for saddle-riding type vehicle

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