JPH084855B2 - Fixing method by rolling the shaft member and the pipe - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing a hollow or solid shaft-shaped member and a pipe by rolling.

[0002]

2. Description of the Related Art Conventionally, as a means for fixing a metal hollow shaft member such as a cylinder tube and a cylinder guide to a pipe, a welding method has been conventionally used. It is being appreciated. Although this welding method has a high bond strength and is reliable, it has a drawback that heat distortion occurs due to welding, and since it requires a long time for welding work, the processing cost is high and the workability is poor, so it is not suitable for mass production. There are challenges that are inappropriate. The present invention is intended to solve this problem and to provide a fixing method that is suitable for mass production at low cost.

[0003]

In order to achieve this object, a hollow or medium hollow having a groove 4 and a collar 5 on its outer peripheral surface is provided.
The real shaft-shaped member 1 is fitted into the pipe 6 and held integrally rotatably, and the shaft-shaped member 1 and the pie die are paired with each other by a pair of first dies 11 and 12 arranged in a direction orthogonal to the rotation axis.
The tip of the pipe 6 is plastically deformed along the concave groove portion 4 while integrally rotating the pipe 6, and then the pair of second dies 15, 1
6 is a fixing method by rolling between the shaft-like member 1 and the pipe 6 for fixing nipping the pipe 6 by bending the flange portion 5 by integrally rotating the shaft-like member 1 to the shaft-like member 1 and the pipe 6 by.

[0004]

[Operation] Using the rolling machine, the first die 11 and the first die 12
The shaft member 1 and the pipe 6 are integrally rotated by the protrusions 13 and 14.
The pipe 6 is rolled and pressed so that the pipe 6 is recessed in the groove 4 of the shaft-shaped member 1.
After squeezing it into the second die, the second protrusion 1 of the second dice 15 and 16
Subsequently, the ribs 5 are rolled and pressed by 7 and 18, so that the collar 5 can be securely fixed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of a method for manufacturing a body part of a hydraulic solenoid. In the figure, 1 is a hollow made of steel
The shaft-shaped member. One end of the shaft-like member 1 has a fitting portion 2 formed on the slightly smaller outer diameter than the inner diameter of the pipe 6 which is fixed, O O-ring groove 3 is provided in the middle of the fitting portion 2 The ring 7 is fitted. A recessed groove portion 4 having a smaller diameter than the fitting portion 2 is formed behind the fitting portion 2, and a collar portion 5 having a larger diameter than the fitting portion 2 is formed behind the recessed groove portion 4. Further, reference numeral 6 in the drawing denotes a stainless steel pipe, and the inner diameter portion at the tip is smoothly chamfered. On the other hand, 11 and 12 are flat-shaped first dies, on the rolling surface of which a projection with a saw-tooth cross-section gradually increases,
It has the first protrusions 13 and 14 formed so that the shape of a predetermined height is continuous from the intermediate portion, and is composed of a pair of upper and lower parts so that the rolling surfaces face each other and move in parallel and in opposite directions. Is mounted on a rolling machine (not shown) (FIG. 5). In addition, reference numerals 15 and 16 in the figure are flat second dies, which are formed so that projections having a chevron cross-section gradually increase on the rolling surface and a shape with a predetermined height is continuous from the middle portion. 2 protrusion 1
7 and 18 are likewise constituted by a pair of upper and lower sides and are mounted on a rolling machine so that the rolling surfaces face each other and move in parallel and in opposite directions (FIG. 5).

In the processing step according to this method, first, as shown in FIG. 1, the pipe 6 is fitted to the fitting portion 2 of the shaft- shaped member 1 and the collar portion 5 is formed.
Insert to the position where it abuts. Next, this is attached to a rolling machine that holds the rotatably integrally. Then, as shown in FIG. 2, the shaft is moved by the relative movement of the pair of first dies 11 and 12.
The member 1 and the pipe 6 rotate integrally with each other, and at this time, the tip end portion of the pipe 6 is rotatably pressed by the first protrusions 13 and 14 to be narrowed along the concave groove portion 4 and plastically deformed. Next, as shown in FIG. 3, relative movement of the pair of second dies 15 and 16 is performed.
As a result, the shaft-shaped member 1 and the pipe 6 move further together. This
During the operation of, the flange portion 5 of the shaft-shaped member 1 is rotatably pressed by the second protrusions 17 and 18 . Thus, the flange portion 5 bent into the groove portion 4 side, is plastically deformed so as to cover the front end of the pipe 6 for fixing the shaft-like member 1 and the pipe 6. Immediately , this fixing method uses a rolling machine to make the first die 1
Rolls pressed by the first protruding portions 13 and 14 of the 1 and 12, after narrowing down the pipe 6 in the groove portion 4 of the shaft-like member 1, the rolling by the second protruding portions 17, 18 of the second die 15 and 16 By bending the pressing brim portion 5, the shaft- shaped member 1 and the pipe 6 can be securely fixed (FIG. 4).

In this embodiment, the O-ring 7 is fitted on the shaft-shaped member 1 to secure the pressure-proof and air-tight structure. However, in the case of general parts that do not require pressure-proof and air-tightness, the O-ring groove 3 is used.
And the O-ring 7 may be omitted. In addition, when fixing both ends of a relatively short pipe to the shaft-shaped member,
It is also possible to roll-fix the two ends at the same time by providing two protrusions 13, 13 of the die 11 corresponding to the processing positions as shown in FIG. Also in this example
Used a hollow member as the shaft-shaped member, but it is not limited to this.
Not solid, but solid depending on the product being assembled.
It may be a shaft member having a shape.

[0008]

As is apparent from the above description, the present invention is
And held rotatable together with fitting the pipe 6 to the shaft-like member 1 provided with a recessed groove portion 4 and the flange portion 5 on the outer peripheral surface, the first die 11, 12 of the pair disposed in the direction perpendicular to the axis of rotation
While integrally rotating the shaft-shaped member 1 and the pipe 6, the tip of the pipe 6 is squeezed along the recessed groove portion 4 for plastic deformation, and then the shaft-shaped portion is formed by the pair of second dies 15 and 16.
The wood 1 and the pipe 6 by bending the flange portion 5 by integrally rotating a fixing method for fixing nipping the pipe 6. According to the present invention, it is possible to perform the processing in an extremely short time as compared with the conventional welding work, the processing cost can be significantly reduced, and the workability is good, and therefore it is most suitable for mass production. In addition, there is no occurrence of thermal strain due to welding, and great effects such as stable improvement of quality can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a pipe fitted into a shaft-shaped member in the fixing method of the present invention.

FIG. 2 is a cross-sectional view showing a processing step using a first die in the fixing method of the present invention.

FIG. 3 is a cross-sectional view showing a processing step using a second die in the fixing method of the present invention.

FIG. 4 is a cross-sectional view of a shaft-shaped member and a pipe fixed by the fixing method of the present invention.

5 is a side view showing a rolled state of FIGS. 2 and 3. FIG.

FIG. 6 is a perspective view of a die showing another embodiment.

[Explanation of symbols]

1 Shaft-shaped member 2 Fitting part 3 O-ring groove 4 Recessed groove part 5 Collar part 6 Pipe 7 O-ring 11, 12 1st die 13, 14 1st protrusion part 15, 16 2nd die 17, 18 2nd protrusion part

Claims (1)

[Claims] 1. A pair of first and second shaft-shaped members each having a groove portion and a collar portion formed on an outer peripheral surface thereof are fitted into a pipe to be integrally rotatably held, and arranged in a direction orthogonal to a rotation axis thereof. The tip of the pipe is plastically deformed along the groove while rotating the shaft member and the pipe integrally with one die, and then a pair of second
Fixing method according rolling between the shaft-like member and the pipe, characterized in that by integrally rotating the shaft-like member and the pipe by a die bends the flange portion to fix nipping the pipe shaft-shaped member.