JPH01168501A - Structure of disc wheel and manufacture thereof - Google Patents

Abstract

PURPOSE:To improve sizing precision, to prevent deterioration of a material, and to prevent lowering of strength, by a method wherein, in a wheel for a vehicle, joint parts are radially formed in both a disc and a pair of annular rims on both sides, and are formed integrally by frictional pressure welding. CONSTITUTION:A disc wheel 1 is constituted of a back rim member 2, a surface rim member 3, and a disc 4. Outward flanges 2a and 3a are formed in the two rim members 2 and 3, and radial joint surfaces are respectively formed thereto. The outer peripheral part 4a of the disc 4 is nipped between the two flanges 2a and 3a and are integrally formed by frictional pressure welding This welding is made is such a manner that the disc 4 is pressed from both sides by means of an oil pressure to be fixed, and the rim members 2 and 3 are rotated in a state to be pressed against the disc 4. This constitution enables improvement of sizing precision and prevention of deterioration of a material and lowering of strength due to heat.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a structure of a disc wheel manufactured by friction welding and a method of manufacturing the same.

(Prior Art) Conventionally, the welding of the disk and rim constituting a vehicle disk wheel has been carried out by fitting the disk onto the inner periphery of the rim, and then carbon dioxide arc welding the contact surface between the flange end of the disk and the rim. This is common.

(Problems to be solved by the invention) However, in manufacturing disc wheels by conventional carbon dioxide arc welding, there are problems such as long processing time and a wide range of heat-affected parts of the product. However, the product accuracy was also not satisfactory.

Therefore, the inventor of the present invention focused on friction welding, which has a short processing time and a small heat-affected zone, and conducted repeated experiments and research. Friction welding has higher energy efficiency than other resistance welding methods, requires less input, and it is easy to set and control pressure welding conditions, and the strength of the weld is increased because the weld is completely fused. Moreover, it is possible to bond even dissimilar materials.

Although it has great utility, it has not yet been used for welding the disk and rim as described above.

In addition, when trying to weld the disc and rim by friction welding in this way, in order to press the disc to the rim made of one piece as in the past, it is necessary to bring the thrust surface of the disc into contact with the inner peripheral surface of the rim. Because of this, the pressure welding surface is not uniform on the circumference, and it is difficult to secure it. In addition, the pressure welding device requires a means to apply a pressing force in the radial direction of the rim, and its structure is complicated. Therefore, it is of little practical use. Furthermore, since the rim is made of one piece as mentioned above, it is necessary to mold each part to the finished dimensions when molding it, and in particular, the central part in the width direction (drop part) must be molded deeply. There was also a problem with processing, which required a heavy load on molds and equipment during processing.

In view of the above, the present invention provides a structure of a disk wheel that has good dimensional accuracy, a small heat-affected zone, little deterioration of the material, and little decrease in strength, and a method for manufacturing the same.

(Means for Solving the Problems) A first aspect of the present invention is a rim in which the body portions of the rim are joined by a friction welding structure, and the rim is composed of a disk and a pair of left and right annular rim members, the disk and The rim member has a disc wheel structure in which a joint is formed in the radial direction and the joint is integrated by friction welding. The joint portion of the rim includes a structure in which the outer periphery of the disk is sandwiched and frictionally welded, and the outer periphery of the disk includes a structure in which the outer periphery of the disk is frictionally welded to one of the joined rim members.

In the Qth invention, when manufacturing a disc wheel by integrally joining the body of the rim and the disc, the disc and the rim member are arranged so that the central axes of the disc and each rim member are on the same axis. , the gist is that at least one of the disk and each rim member is rotated, at least the other one is fixed unrotatably, and a pressing force is applied to one of them to perform friction welding, and the same The disk and the rim member are arranged on an axis so that a flange provided on the rim member advances toward the outer periphery of the disk, and the disk is fixed and the rim member is rotated while moving along the axis. the disc wheel, the disc wheel comprising: moving forward along the axis to frictionally weld the disc and the rim member, or advancing along the axis while rotating the disc and without rotating the rim member to frictionally weld the disc and the rim member. This is a manufacturing method.

(Function) The first invention is applicable not only to deep-drawn type disc wheels but also to disc wheels of various shapes, and also has a short manufacturing process (less thermal effects, so even deep-drawn type disc wheels have high strength). The objective is to obtain a high-quality, high-precision disc wheel.

In the second invention, the disk and the rim member are arranged on the same axis, at least one of the disk and each rim member is rotated, and at least the other one is fixed non-rotatably, and these The disc and the rim member are arranged on the same axis, and the flange provided on the rim member is attached to the outer periphery of the disc. The disc is fixed and the rim member is rotated while the disc is fixed and the rim member is rotated while the disc is fixed and the rim member is moved forward along the axis to bring them into friction pressure contact, or the disc is rotated and the rim member is rotated. Since the disc and the rim member are frictionally welded by moving forward along the axis without moving forward, the work is done in a short time, and the contact surface between the rim member and the disc is pressed together by the axial pressing force and rotational friction. Melt and join.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1, 2, and 3 are longitudinal cross-sectional views showing three embodiments of the disc wheel 1 according to the first invention, respectively.

The disc wheel 1 is of a deep-drawn type and is composed of a rim member 2 on the back side (left side in the figure), a rim member 3 on the front side (right side in the figure), and a disk 4.

In the one in Figure 1, both rim members 2 and 3 have outward flanges 2.
a and 3a, each having a joint surface in the radial direction. The outer circumferential portion 4a of the disk 4 is sandwiched between the flanges 2a and 3a, and a joint is formed in which the three are joined together by friction welding. In such a joint, the burr generated on the outer periphery of the rim during pressure welding can be easily removed, and workability is good.

In the one in Figure 2, both rim members 2.3 have inwardly directed flanges 2.
a and 3a, each having a joint surface in the radial direction. The outer circumferential portion 4a of the disk 4 is sandwiched between the flanges 2a and 3a, and a joint is formed in which the three are joined together by friction welding. Even in the case of this structure, burrs occurring on the outer periphery of the rim can be easily removed.

In the embodiment shown in FIG. 3, both rim parts 2.3 form inwardly directed flanges 2a, 3a and each have a radial abutment surface. Then, the flanges 2a and 3a are directly friction welded, and the outer peripheral part 4a of the disk 4 is joined to the front side of the flange 3a of the front rim member 3, so that the three parts are integrated into a joint by friction welding. Configure.

With this structure, the rim is completed and the disc is attached afterwards.

FIG. 4 is a side view of one embodiment of the present disc wheel 1 manufacturing apparatus, in which hydraulic clamp cylinders 5.5 for fixing the disc 4 are arranged on the left and right, and the hydraulic clamp cylinders 5.5 are arranged on the same axis from the hydraulic clamp cylinders 5.5. A clamp device 6 is constructed in which rods 6c and 6c extend facing each other, and suppressing portions 6a and 6b are provided at the tips of the rods 6c and 6c, respectively, to press and fix the disk 4 from both sides. On the other hand, lamp jigs 7.7 are provided on both sides of the clamp device 6, which are rotatable about the axis of the rod 6c independently of the rotor c. The clamp jig 7 is composed of a body part 7a, an inner clamp 7b, and an outer clamp 7c.A bearing 11 supports the body part 7a on the outside of the body part 7a, and a flange for transmitting rotational power is provided at the end. There is 7d. The rim member 2 or 3 is held between the inner clamp 7b and the outer clamp 7c. The rotation device of the clamp jig 7 uses a motor 8 to transmit rotational power to the flange 7d. In other words, the power from the motor 8 is transmitted to the rotating shaft 10 via the pulley 8a.The single rotating shaft 10 is hollow and the rod 6c is inserted through the central shaft position.
Clutch 10a and brake 10b for power switching
are provided as necessary, and a flange 10c is connected to the flange 7d. The forward and backward movement mechanism of the clamp jig 7 is provided by a hydraulic slide device 9.

Next, the operating status of this device will be explained. The members to be frictionally welded are the rim members 2, 3 and the disc 4. First, to fix the disk 4, the left and right hydraulic clamp cylinders 5,5 are operated to extend the rods 6c, 6c. Pressing portions 6a and 6b at the tip of the rod 6c are pressed from both sides of the disk 4. A suppression part 6 is inserted into a hole drilled in the center of the disk 4.
By inserting the protrusion 6d provided at the center of the disk 4, the disk 4 is positioned correctly on the axis.

Next, the rim members 2 and 3 are attached to the clamp jig 7, respectively. That is, the rim member 2 or 3 is attached to the inner clamp 7b.
is fitted, and the outer clamp 7c is pressed and fixed to the outside of the rim member using a three-way tightening chuck whose circumference is divided into three parts. When the setting of the disc 4 and rim member 2 or 3 to be joined is completed, the motor 8 is started and the clamping jig 7 is turned on.
At the same time, the hydraulic slide device 9 is operated to move the clamp jig 7 forward toward the fixed disk 4, and press the flanges of the rim members 2 and 3 against the circumference of the disk. The fixed disk 4 and the rotating rim members 2 and 3 generate frictional heat with each other, become molten, and join together, and their rotation is stopped.

In the above embodiment, the disk 4 is fixed at the center and the rim members 2 and 3 are rotated to produce a disk wheel by friction welding.Next, while rotating the disk, the rim member is attached to the disk side. We will discuss the case of friction welding by moving the material forward.

The manufacturing apparatus in this case is shown in FIG. 5, and the structural members are substantially the same as those in the previous embodiment (the same members as in the previous embodiment are given the same reference numerals), and include a clamping device 6 for holding the disk 4.
is configured to be rotated by the rotational power of the motor 8. When the rim members 2, 3 and the disk 4 are brought into pressure contact with each other, the rim members 2, 3 and the disk 4 are attached to the device as shown in FIG. The rim members 2 and 3 are advanced toward the disk 4 by the slide device 9, and the flanges 2a and 3a of the rim members 2 and 3 are brought into contact with the outer periphery of the disk 4 and are frictionally welded.

As described above, in the structure of the disc wheel of the present invention, in order to secure a sufficient joint area, the edges of the rim members 2 and 3 are processed to form flanges in the radial direction, thereby making it possible to securely join them.

In addition to the manufacturing method described above, first, without rotating one rim member 2 or 3, the other rim member is rotated to frictionally press the rim members together, and then the disk 4 is attached to one side of the joint. Various methods are possible, such as attachment by friction welding.

(Effects of the Invention) As described above, the first invention consists of a disk and a pair of left and right annular rim members, the disk and the rim members are formed with joints in the radial direction, and the joints are friction welded. Since it is an integrated disc wheel, it can be easily manufactured even with deep drawing type disc wheels, and since the joining part is formed in the radial direction, the joining area is wide and friction welding is performed reliably. Unlike joining by carbon dioxide arc welding, the heating area is small and the heating time is short, so the resulting product has high joint strength and dimensional accuracy.Since the rim consists of a pair of left and right annular rim members, Each of its parts is easy to mold, especially when molding the widthwise central part (drop part) of conventional rims, the rim can be constructed even if the acid part is molded into a substantially tapered shape, which reduces the load on molds and equipment. It is possible to reduce the

The second invention also provides a method for manufacturing a disc wheel by integrally joining a disc and a pair of left and right annular rim members, so that the disc and the rim members are joined together so that the central axes of the disc and each rim member are on the same axis. This is done by applying pressure and friction welding.
During processing, there is no need for a means to apply a pressing force in the radial direction of the rim, and manufacturing is possible with only a pressing force in the direction of the rotation axis, so the manufacturing equipment has a simple structure regardless of whether it is vertical or horizontal. Therefore, costs can also be reduced. In addition, each part moves along a linear axis and the disc wheel is precisely positioned during processing, resulting in high processing accuracy and processing in a short time, unlike conventional carbon dioxide arc welding. Even with disc wheels, the strength of the joints is high, making it possible to manufacture and supply high-precision products in large quantities.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIGS. 1, 2, and 3 are longitudinal sectional views of a disc wheel, and FIG. 4 is a partially cutaway diagram showing an example of a disc wheel manufacturing apparatus. FIG. 5 is a partially cut away longitudinal sectional view showing another example of the device. 1... Disc wheel, 2.3...
rim parts. 4...Disk, 5...Hydraulic clamp cylinder, 6...Clamp device, 7...
・Clamp jig, 8...Motor, 9...
...Hydraulic slide device. Figure 1

Claims (9)

[Claims] (1) Consisting of a disk and a pair of left and right annular rim members,
The disc wheel has a structure in which a joint is formed in the radial direction of the disc and the rim member, and the joint is integrated by friction welding. (2) The disc wheel structure according to claim 1, wherein the joint portion is formed by sandwiching the outer peripheral portion of the disc between outward flanges provided on each rim member. (3) The disc wheel structure according to claim 1, wherein the joint portion is formed by sandwiching the outer peripheral portion of the disc by an inward flange provided on each rim member. (4) The structure of the disc wheel according to claim 1, wherein the joint portion is directly joined to inward flanges provided on each rim member, and the outer peripheral portion of the disc is joined to either of the flanges. . (5) When manufacturing a disc wheel by integrally joining the disc and the pair of left and right annular rim members, the disc and the rim member are arranged so that the central axes of the disc and each rim member are on the same axis, A disc wheel characterized in that at least one of the disc and each rim member is rotated, at least one of the other members is fixed so as not to rotate, and a pressing force is applied to one of these members for friction welding. manufacturing method. (6) The rim member has a radial flange, and the flange is configured to sandwich the outer circumferential portion of the disk so that the flanges of the rim member advance toward the outer circumferential portion from both sides of the outer circumferential portion, and the rim member has a radial flange. 6. The method of manufacturing a disk wheel according to claim 5, wherein the disk wheel is fixed and the rim member is rotated while moving forward along the axis to bring the disk and the rim member into friction pressure contact. (7) The rim member has a radial flange, and the flange is configured to sandwich the outer periphery of the disk so that the flanges of the rim member advance toward the outer periphery from both sides of the outer periphery, and 6. The method of manufacturing a disk wheel according to claim 5, wherein the disk wheel is rotated and moved forward along the axis without rotating the rim member to frictionally press the disk and the rim member. (8) The rim member has flanges facing inward, and the flanges are frictionally welded together, and then the outer peripheral portion of the disk is frictionally welded to one of the flanges of each rim member. Disc wheel manufacturing method. (9) The rim member has a flange facing inward, and the outer circumferential portion of the disk is frictionally welded to the flange of one of the rim members, and then the flange of the other rim member and the flange of the one rim member are bonded together. 6. A method for manufacturing a disc wheel according to claim 5, which comprises friction welding.