JP2005350003A - Method of manufacturing full-face type disc wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform welding of a full-face type disc material to a no-flange side end of a rim having a rim flange only at one side without generating thermal influence of welding. <P>SOLUTION: When the full-face type disc is installed on the no-flange side end of the rim having the rim flange only at one side, after the no-flange side end edge of the rim is abutted on a back side of the full-face type disc, FSW welding is applied to the abutment part. Thereby, since the thermal influence due to the welding is extremely less and partial deformation is not generated on the rim and the disc, harmful influence is not exerted to traveling feeling by generating vibration in traveling of the vehicle. Further since design property is not deteriorated by partially generating distortion on a disc surface or production of an oxidized film by welding burning does not occur on a surface side of the disc, an oxidized film removal work for preventing deterioration of coating quality is not required and shortening of process, cost reduction and high quality can be realized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing a full-face type disc wheel, and in particular, aims to improve the quality by reducing the thermal influence due to welding, and to improve the production efficiency and reduce the cost.

  The full face type disc wheel has been attracting attention recently due to its unique styling, and after the end of the rim having a rim flange on one side only on the back side of the full face type disc, the abutting part Is constructed by integrating arc welding mainly in the circumferential direction.

  In addition, in order to maintain sufficient strength from the necessity of exhibiting its unique design and design characteristics, the full face type disc wheel uses a thicker plate than the rim, but in this case Since the thickness of the portion corresponding to the rim flange of the disc is inevitably increased, a general-purpose balance weight cannot be used as it is. Moreover, in order to facilitate welding with a rim having a thin plate thickness and to maintain sufficient strength, it is necessary to make the portion corresponding to the flange of the rim relatively thin.

  Under such circumstances, regarding the manufacture of such a full face type disc wheel, various devices have been made so far at the joint portion between the rim having a rim flange on only one side and the full face type disc. As a specific example, Japanese Patent Application Laid-Open No. 5-58106 discloses an invention of a “two-piece full-face disc wheel”.

This is because when the full face type disk 2 is assembled and welded to the rim 1, no special positioning means for the disk 2 and the rim 1 is required, the removal of the weld bead is not required, and the surface of the disk due to welding heat is removed. In the plating, no discoloration or the like is generated, and a radial cut 10c is made in the outer peripheral portion 10 of the disk 2 so that the outer peripheral portion 10 is split into a disk outer peripheral portion 10a and an inner portion 10b. The front flange 4 is formed at 10a and the fitting portion 6 is formed at the inner portion 10b, and the fitting portion 6 thus formed is fitted and welded to the inner peripheral surface 5 of the front bead sheet of the rim 1. It is.
JP-A-5-58106

  However, when the flange-less end of the rim having the rim flange only on one side is abutted on the back side of the full-face type disk, and then arc welding is performed along the circumferential direction at the abutting portion, the welding wire is heated at a high temperature. Because it melts and performs high-temperature welding while flying an arc (spark), the welded part of the rim is pulled to the disk side due to thermal shrinkage due to cooling at room temperature after welding, resulting in vibration during vehicle travel Often have a negative impact on driving feeling.

  Not only that, but due to high temperature welding, the disk surface is partially distorted to deteriorate the design, or an oxide film is formed on the disk surface due to welding burn. In order to prevent the deterioration, it is necessary to perform buff repair on the disk surface to remove the oxide film.

  Accordingly, the present invention solves the above-mentioned problems, and in particular, improves the quality by reducing the thermal influence due to welding, and further improves the production efficiency and reduces the cost. In the first aspect of the invention, in the case where the full face type disc is assembled to the end of the rim having no rim flange only on one side, the end face of the rim without flange is abutted against the back side of the full face type disc. The present invention relates to a manufacturing method of a full face type disc wheel in which friction stir welding (hereinafter simply referred to as “FSW welding”) is sequentially performed on a butt portion along the circumferential direction.

  Further, in the case of assembling the full face type disk at the flange-less end portion of the rim having the rim flange only on one side, the invention of claim 2 is thinned toward the outer peripheral edge at a position near the outer peripheral edge of the full face type disk. The full-face type disk is formed by forming the stepped portion over the entire circumference, fitting the edge portion without the flange of the rim to the stepped portion, and sequentially performing FSW welding along the circumferential direction on the fitting portion. The present invention relates to a method for manufacturing a wheel.

  Further, the invention of claim 3 is the invention according to claim 2, wherein the method of forming the stepped portion thinned toward the outer peripheral end over the entire circumference at a position near the outer peripheral edge of the full-face type disk is a thinning process by forging. The present invention relates to a manufacturing method of the full face type disc wheel. Further, the invention according to claim 4 is the invention according to claim 2, wherein the method of forming the stepped portion thinned toward the outer peripheral edge at the position near the outer peripheral edge of the full face type disk is the thinning process by cutting. The present invention relates to a manufacturing method of the full face type disc wheel.

  Furthermore, in the case of assembling the full face type disc to the flange-less side end portion of the rim having the rim flange only on one side, the invention according to claim 5 abuts the flange-less end edge portion of the rim on the back side of the full face type disc. The present invention also relates to a method of manufacturing a full face type disc wheel in which FSW welding is sequentially performed in the circumferential direction from the surface side of the full face type disc toward the abutting portion.

  Further, the invention according to claim 6 is the rear side of the full face type disk when the flange-less side end joint portion of the rim is abutted against the position near the rear outer peripheral edge of the full face type disk. The present invention relates to a method for manufacturing a full-face type disc wheel according to claim 5, wherein the surface extending from the contact portion to the outer peripheral edge is subjected to thickness reduction processing by forging in advance.

  In the present invention, as described above, after the flange-less end edge of the rim is abutted against the back side of the full-face type disk, the FSW welding is sequentially performed on the abutting portion along the circumferential direction. Is extremely small and does not cause partial deformation of the rim or disc, so there will be no vibration during driving and adversely affect the running feeling, and the disc surface will be partially distorted to deteriorate the design. In addition, because there is no generation of oxide film due to welding burn on the surface side of the disk, there is no need for oxide film removal work to prevent deterioration of the coating quality, realizing process shortening, cost reduction and high quality can do.

  Further, since the welding joining means between the rim and the disk is FSW welding, not only the iron rim and the iron disk, but also the iron material in the case of welding joining with a dissimilar metal such as an iron rim and an aluminum alloy disk. Sufficient bonding strength not inferior to each other can be maintained, and variations as a full face type disc wheel can be increased.

  The specific contents of the present invention will be described below with reference to the first embodiment shown in FIGS. 1 and 2. In FIG. 1, 1 represents a rim and 4 represents a full-face type disk. In the present invention, the full-face type disk means that the disk surface and the flange portion positioned on the outer periphery of the disk are molded as a one-piece member by using the outer periphery of the disk as the surface flange of the rim. .

  The rim 1 has a substantially cylindrical shape by abutting both ends of a strip-shaped steel plate having a certain width necessary for fitting a tire and performing flash butt welding. The rim 1 has a rim flange 2 only on one side, and the opposite side is configured as a flange-less end portion 3. The full face type disk 4 is not particularly shown, but a circular disk material is punched from a rectangular steel plate having a length and width of about 500 mm and a thickness of about 5 mm, and more preferably one side (back side or rim) of the disk material. 1), a thinned portion 4a is formed in advance on the surface from the side edge 3 abutting portion of the rim 1 to the outer peripheral edge, and in the vicinity of the abutting portion of the side edge 3 of the rim 1. A step 4b is formed.

  As for the thinning process in this case, for example, using a large press device, the disk material is aligned and placed on a flat die, and the punch for thinning is pressed down from above toward the disk material. By performing the forging process to be performed, a disk material provided with the reduced thickness portion 4a and the stepped portion 4b is obtained. In this case, the disk material provided with the thinned portion 4a can also be obtained by performing cutting instead of the forging described above.

  The disk material subjected to the thinning process in this way is further subjected to pressing or stamping by performing the first and second steps by the upper and lower molds, and further punching around the center hole and the like. Thus, the full face type disk 4 is molded.

  In the configuration of the first embodiment described above, when the full face type disk 4 is assembled to the flangeless side end of the rim 1 having the rim flange 2 only on one side, the flange of the rim 1 is not provided on the back side of the full face type disk 4. After the side edge 3 is abutted or fitted to the step 4b formed on the back side of the full face type disk 4, FSW welding, that is, friction stir welding (Friction Stir Welding) is applied to the abutting part or fitting part. The FSW welding tool 5 is sequentially applied in the circumferential direction while the FSW welding tool 5 is placed along the flange-less end edge 3 of the rim 1 to complete the intended full-face type disc wheel.

  In addition, since FSW welding is a state in which a welding tool having a flat tip surface is pressed against the joining surface of two joining materials to be joined, it is joined while being sequentially moved while rotating at high speed. That cannot be applied to the welding of the abutting portion of the edge 3 of the rim 1 on the rim 1 against the mold disk 4 and has been used only as a means for joining flat plate-like joining materials so far It is.

  However, the surface of the stepped portion 4b of the full face type disc 4 and the rim 1 are formed by means such as forming a thin stepped portion 4b around the outer peripheral end at a position near the outer peripheral edge of the full face type disc. It became possible to join the surface of the flange-less side end portion 3, and it was possible to perform FSW welding W on the joined portion. In addition, by applying this welding method to the joining of full face type discs and rims, the welding heat quantity can be reduced to 1/10 or less compared to conventional welding methods such as arc welding. It became possible to suppress it to 1/10 or less.

  Further, FIG. 3 shows a second embodiment of the present invention. This is because, when the full face type disk 4 is assembled to the flangeless side end 3 of the rim 1 having the rim flange 2 only on one side, the flangeless side edge 3 of the rim 1 is projected on the back side of the full face type disk 4. After fitting or fitting to a step 4b formed on the back side of the full face type disc 4, FSW welding, ie, FSW welding tool 5 is used from the front side of the disc 4 using a Friction Stir Welding device. In this way, FSW welding W is sequentially performed in the circumferential direction toward the flange-less end edge 3 of the rim 1, thereby completing the intended full-face type disc wheel. .

The fragmentary sectional view of the full face type disc wheel manufactured by the method of the present invention. The principal part expanded sectional view showing the joining state by FSW welding with the disk which is 1st Example in this invention, and the edge part without a flange of a rim | limb. The principal part expanded sectional view showing the joining state by FSW welding of the disk which is 2nd Example in this invention, and the edge part without a flange of a rim | limb.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rim 2 Rim flange 3 End part without flange 4 Full face type disk 4a Thinning part 4b Step part 5 FSW welding tool W FSW welding

Claims (6)

  When assembling a full face type disk to the flangeless side end of a rim that has a rim flange only on one side, the edge of the flangeless side of the rim is butted against the back side of the full face disk, and then the circumferential direction on the butted part A method of manufacturing a full face type disc wheel in which FSW welding is sequentially performed along   When assembling a full face disc on the flangeless side end of a rim that has a rim flange only on one side, a thin stepped part is formed over the entire circumference at a position near the outer peripheral edge of the back face of the full face disc. A method of manufacturing a full-face type disc wheel in which the flange-less end edge portion of the rim is fitted to the stepped portion and then FSW welding is sequentially performed on the fitting portion along the circumferential direction.   3. The full face type disc wheel according to claim 2, wherein the method of forming a stepped portion thinned toward the outer peripheral edge at a position near the outer peripheral edge of the full face type disc is a thinning process by forging. Production method.   3. The full face type disc wheel according to claim 2, wherein the method of forming the stepped portion thinned toward the outer peripheral edge at a position near the outer peripheral edge on the back side of the full face type disc is a thinning process by cutting. Production method.   When assembling a full face type disc to the flangeless side end of a rim that has a rim flange only on one side, the rim flange side end edge is abutted against the back side of the full face type disc and then the surface of the full face type disc A full face type disc wheel manufacturing method in which FSW welding is sequentially performed in the circumferential direction from the side toward the butted portion.   When the flange-side end joint of the rim is abutted to the position near the rear outer peripheral edge of the full-face type disk, it is on the back side of the full-face type disk and extends from the rim side end contact part to the outer peripheral edge. 6. The method of manufacturing a full face type disc wheel according to claim 5, wherein the surface is subjected to thickness reduction processing by forging in advance.

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