JPS6360268B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a pulley with a shaft by friction welding, and in particular, a method for manufacturing a pulley with a shaft by friction welding, and in particular, a method for rotating a rim and a dish-shaped disc relative to each other, and pressing and deforming the disc from both sides. The present invention relates to a method for manufacturing a shafted pulley in which the outer diameter of the pulley is increased, frictional heat is generated between the inner peripheral surface of the rim and the outer peripheral surface of the disc, and the rim and the disc are friction welded.

BACKGROUND TECHNOLOGY As shown in FIG. 1, a conventional method for manufacturing a pulley with a shaft involves forming a rim 1 and a hub 2 integrally by casting, and then machining the rim 1 and a hub 2 to form a hub inside the rim 1. After pushing the shaft 3 into the boss portion 5 of No. 2, the boss portion 5 and the shaft 3 were fixed with a set screw 4, which resulted in a complicated shape of the part, high material and processing costs, and reduced processing time. It took a lot of time, and the assembly work was troublesome.

In addition, a pulley manufacturing method was developed in 1973, in which the shaft part made by hot and cold forging and the rim part made by cold rolling were integrated by friction welding.
It is proposed as Publication No. 161454.

However, in this method, the end face of the rim of the pulley is friction welded to the end face of a disk integrally provided on the shaft, and the inner circumferential surface of the rim and the outer circumferential surface of the disk are friction welded. I couldn't do it.

Problems to be Solved by the Invention The first object of the present invention is to eliminate the above-mentioned drawbacks and to provide a shaft capable of reliably fixing the inner circumferential surface of the rim and the outer circumferential surface of the disk inside the rim. An object of the present invention is to provide a method for manufacturing a pulley with a pulley.

Moreover, the second object of the present invention is to
In addition to the effect of the second invention, the inner peripheral surface of the rim and the outer peripheral surface of the disk, and the inner peripheral surface of the disk and the outer peripheral surface of the shaft are fixed simultaneously inside the rim, and the shaft and the disk are fixed in advance. It is an object of the present invention to provide a method for manufacturing a pulley with a shaft, which does not require fixation and can simplify the shape of the parts.

Means for Solving the Problems In the first method of manufacturing a pulley with a shaft according to the present invention, the shaft is fixed to the inside of the rim of the pulley, and the rim has a dish-shaped outer diameter smaller than the inner diameter of the rim. The rim and the disk are rotated relative to each other, and the disk is pressed and deformed from both sides to increase the outer diameter of the disk, so that the inner peripheral surface of the rim and the disk are rotated relative to each other. The structure is characterized in that frictional heat is generated between the inner circumferential surface of the rim and the outer circumferential surface of the disk by friction welding between the inner circumferential surface of the rim and the outer circumferential surface of the disk.

The second method of manufacturing a pulley with a shaft according to the present invention is such that the inside of the rim of the pulley has bent edges at the center and outer periphery, and has an annular dish shape with an outer diameter smaller than the inner diameter of the rim. A disk is inserted, a shaft having an outer diameter smaller than the inner diameter of the disk is inserted into the disk, and the rim, the disk, and the shaft are rotated relative to each other, and the disk is pressed from both sides. The inner circumferential surface of the rim, the outer circumferential surface of the disk, the inner circumferential surface of the disk, and the outer circumference of the shaft are deformed to increase the outer diameter of the disk and simultaneously reduce the inner diameter of the disk. The inner circumferential surface of the rim and the outer circumferential surface of the disk, and the inner circumferential surface of the disk and the outer circumferential surface of the shaft are friction welded by generating frictional heat between the two surfaces. It has a structure.

EXAMPLES Hereinafter, a method for manufacturing a shafted pulley according to the present invention will be explained in detail based on the drawings.

A first embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

In FIG. 2A, 6 is a pulley rim 6 formed by bulging a steel pipe.

In FIG.
are fixed by welding 9 to form a disc with a shaft, and the outer diameter of the dish-shaped disc 7 is smaller than the inner diameter of the rim 6.

FIG. 3 shows a state in which the disk 7 to which the shaft 8 is fixed and the rim 6 are friction welded.

The rim 6 is fixed by a fixing device (not shown), and both sides of a dish-shaped disc 7 to which a shaft 8 is fixed are held between a rotating body 10 and a rotating body 11, and the rotating body 11 is attached to a thrust bearing 12. Pressing piece 1 through
It is supported by 3.

Friction welding of the pulley rim 6 and the dish-shaped disk 7 to which the shaft 8 is fixed is carried out by the following steps.

First, the rim 6 of the pulley is fixed to a fixing device (not shown), and a disk-shaped disk 7 having an outer diameter smaller than the inner diameter of the rim 6 to which the shaft 8 is fixed inside the rim 6 is prepared.
be inserted.

Next, the dish-shaped disc 7 is connected to the rotating body 10 and the rotating body 1.
At the same time, the disk 7 is rotated with respect to the rim 6 by the rotating bodies 10 and 11.

The dish-shaped disk 7 has rotating bodies 10, 1 on both sides thereof.
1, the disc 7 is pressed and deformed into a flat state.
By increasing the outer diameter of the disk 7, the outer circumferential surface of the disk 7 is pressed against the inner circumferential surface of the rim 6, and frictional heat is generated between the outer circumferential surface of the disk 7 and the inner circumferential surface of the rim 6. Then, the relative rotational movement between the rim 6 and the disk 7 is stopped, and at the same time, the friction welding between the outer circumferential surface of the disk 7 and the inner circumferential surface of the rim 6 is completed.

Next, a second embodiment of the present invention will be described in detail with reference to FIGS. 4, 5, and 6.

In this embodiment, the shaft 8 and the disk 14 are separate bodies, and the friction between the shaft 8 and the disk 14 is similar to that in the first embodiment shown in FIGS. 2 and 3. This embodiment is substantially the same as the first embodiment except that welding is performed.

The rim 6 of the pulley, as shown in FIG. 4A, is formed by bulging a steel pipe as in FIG. 2A.

In FIGS. 4B and 5, an annular dish-shaped disk 14 has folding lines at the center and outer periphery, a hole 15 is provided in the center of the disk 14, and a flat surface of the disk 14 is provided with a hole 15. A plurality of fixing holes 16 are provided at predetermined positions.

FIG. 4C shows the shaft 8 inserted into the hole 15 of the disc 14.
It is shown.

The outer diameter of the annular disk-shaped disk 14 is smaller than the inner diameter of the rim 6, and the diameter of the hole 15, which is the inner diameter of the annular disk-shaped disk 14, is larger than the outer diameter of the shaft 8. There is.

In FIG. 6, a state in which the annular dish-shaped disc 14 into which the shaft 8 is inserted and the rim 6 are friction welded is shown.

The rim 6 is fixed to a fixed support stand 17, the shaft 8 inserted into the hole 15 of the annular dish-shaped disc 14 is fixed to the fixed support stand 20, and both sides of the annular dish-shaped disc 14 are provided with rotating bodies. 18 and a rotating body 21, and the rotating body 21 is supported by a fixed support base 20 via a thrust bearing 19.

Further, the fixing hole 1 provided in the annular dish-shaped disc 14
6, one rotating body 18 or the other rotating body 21
The annular dish-shaped disc 14 is inserted into the rotating bodies 18 and 21 by passing through the protruding part provided on the rotating body 21 and engaging the protruding part with a recess provided in the other rotating body 21 or one of the rotating bodies 18. mounted against.

Note that it is also possible to configure the rotating body 21 and the rotating body 18 to be rotationally connected by pressing both sides of the annular dish-shaped disc 14.

To friction weld the pulley rim 6 and the annular dish-shaped disc 14 and the annular dish-shaped disc 14 and the shaft 8,
This is done through the following steps.

First, the rim 6 of the pulley is fixed to the fixed support base 17, and the shaft 8 is fixed to the fixed support base 20, and then both sides of the annular dish-shaped disc 14 are sandwiched between the rotating body 18 and the rotating body 21. Then, the disk 14 having an outer diameter smaller than the inner diameter of the rim 6 is inserted into the inside of the rim 6, and the shaft 8 having an outer diameter smaller than the diameter of the hole 15 of the disk 14 is inserted into the hole 15 of the disk 14. Place in the state.

After setting this state, the annular dish-shaped disc 14
is sandwiched between the rotary body 18 and the rotary body 21 and pressed, and the disk 14 is rotated with respect to the rim 6 and the shaft 8 by the rotary body 18 and the rotary body 21.

The annular dish-shaped disc 14 is surrounded by the rotating body 1 from both sides.
8, 21 to press and deform it into a flat state,
By increasing the outer diameter of the disk 14 and simultaneously reducing the inner diameter of the hole 15 in the disk 14, the outer circumferential surface of the disk 14 is pressed against the inner circumferential surface of the rim 6, and the outer circumference of the disk 14 is pressed against the inner circumferential surface of the rim 6. The inner diameter of the hole 15, that is, the inner circumferential surface is pressed against the outer circumferential surface of the shaft 8, generates frictional heat between the outer circumferential surface of the disk 14 and the inner circumferential surface of the rim 6, and is melted. Frictional heat is generated between the inner peripheral surface of the shaft 8 and the outer peripheral surface of the shaft 8, and the shaft 8 is melted.

Next, the relative rotational movement between the rim 6, the shaft 8, and the disk 14 is stopped, and at the same time, the inner peripheral surface of the rim 6, the annular disk-shaped disk 14, the inner peripheral surface of the annular disk-shaped disk 14, and the shaft 8 Friction welding with the outer circumferential surface of is completed.

Although the disk is rotated relative to the rim in FIGS. 3 and 6, it is not necessarily limited to this. For example, the disk may be fixed and the rim may be rotated relative to the disk. may be rotated, or both may be rotated in opposite directions,
In any case, it is sufficient to generate relative rotational movement between the disk to which the rim and the shaft are fixed, or between the rim, the shaft, and the disk.

Effects of the Invention As described above, according to the first method of manufacturing a pulley with a shaft according to the present invention, the shaft is fixed inside the rim of the pulley, and the outer diameter is smaller than the inner diameter of the rim. A dish-shaped disk with a diameter of By generating frictional heat between the outer circumferential surface of the rim and friction welding the inner circumferential surface of the rim and the outer circumferential surface of the disk, the inner circumferential surface of the rim and the outer circumferential surface of the disk are securely bonded inside the rim. This makes it possible to easily weld the outer edge of the disc at a location away from both ends of the inner surface of the rim.
Since sheet metal can be used for the rim and disc,
The parts are simple, the material and processing costs are very low, the processing time is extremely short, and the assembly work can be automated.

According to the second method of manufacturing a pulley with a shaft of the present invention, the inside of the rim of the pulley has a bent edge at the center and outer periphery, and has an annular dish shape with an outer diameter smaller than the inner diameter of the rim. A disk is inserted into the disk, a shaft with an outer diameter smaller than the inner diameter of the disk is inserted, and the rim, disk, and shaft are rotated relative to each other, and the disk is pressed and deformed from both sides to form a disk. At the same time, the outer diameter of the disk is increased, and the inner diameter of the disk is reduced, and frictional heat is generated between the inner circumferential surface of the rim and the outer circumferential surface of the disk, and between the inner circumferential surface of the disk and the outer circumferential surface of the shaft. By friction welding the inner circumferential surface of the rim and the outer circumferential surface of the disk, and the inner circumferential surface of the disk and the outer circumferential surface of the shaft, in addition to the effect of the first invention, the rim The inner circumferential surface of the disk and the outer circumferential surface of the disk, and the inner circumferential surface of the disk and the outer circumferential surface of the shaft can be fixed at the same time, and there is no need to fix the shaft and disk in advance. Since the shape can be made simple, material costs and processing costs can be very low, and processing time can be shortened.

[Brief explanation of drawings]

Figure 1 is a sectional view of the main part of a conventional pulley with a shaft, and Figures 2A and 2B are dish-shaped pulleys to which the rim and shaft are fixed, which are used in the first method of manufacturing a pulley with a shaft according to the present invention. FIG. 3 is a cross-sectional view of the main part showing the state in which the rim shown in FIG. 2 and the disk are friction welded, and FIG. 4 A, B, and C are A rim of a pulley used in the second method of manufacturing a pulley with a shaft according to the present invention,
FIG. 5 is a perspective view of the annular dish-shaped disc, and FIG. 6 is a cross-sectional view showing the rim, disc, and shaft shown in FIG. 4. FIG. 3 is a sectional view of a main part showing a state in which friction welding is performed. 1...Rim, 2...Hub, 3...Shaft, 4...Set screw, 5
…Boss part, 6…Rim, 7…Dish-shaped disc, 8…Shaft,
9... Welding, 10, 11... Rotating body, 12... Thrust bearing, 13... Pressing piece, 14... Annular plate-shaped disc, 15... Hole, 16... Fixing hole, 17... Fixed support base, 18... Rotating body , 19... Thrust bearing,
20...Fixed support base, 21...Rotating body.

Claims (1)

[Claims] 1. A disk-shaped disc having a shaft fixed to the rim and having an outer diameter smaller than the inner diameter of the rim is inserted into the rim of the pulley, and the rim and the disc are connected to each other. Increasing the outer diameter of the disc by making a relative rotational movement and deforming the disc by pressing from both sides,
A pulley with a shaft, characterized in that frictional heat is generated between the inner circumferential surface of the rim and the outer circumferential surface of the disk, and the inner circumferential surface of the rim and the outer circumferential surface of the disk are friction welded. Production method. 2. An annular dish-shaped disc having bent edges at the center and outer periphery and having an outer diameter smaller than the inner diameter of the rim is inserted into the rim of the pulley, and the disc has a diameter smaller than the inner diameter of the rim. A shaft with a small outer diameter is inserted, and the rim, the disk, and the shaft are rotated relative to each other, and the disk is pressed and deformed from both sides to increase the outer diameter of the disk. The inner diameter of the plate is reduced, frictional heat is generated between the inner circumferential surface of the rim and the outer circumferential surface of the disk, and between the inner circumferential surface of the disk and the outer circumferential surface of the shaft, and the inner circumference of the rim is reduced. 1. A method of manufacturing a pulley with a shaft, comprising friction welding a surface and an outer circumferential surface of the disk, and an inner circumferential surface of the disk and an outer circumferential surface of the shaft.