JP2002301578A - Friction pressure welding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide friction pressure welding equipment capable of performing friction pressure welding even if the joint part of the members to be joined to each other is not continuous in a circumferential direction and even if the joint part is a non-circular shape. SOLUTION: The friction pressure welding 1 is provided with a central axis A of a main spindle 12 for transmitting its driving force and a chuck 14 disposed rotatably across a bearing 13 at the main spindle 12 of a central axis B offcentered from the central axis A at an eccentric rate R with respect to the central axis. The equipment described above comprises the chuck 14 which clamps the first member to be joined 20, a wire spring 16 which connects the chuck 14 and a floor 15 of the friction pressure welding equipment 1 and a clamp 5 which fixes the second member to be joined 21. When the main spindle 12 rotates, the main spindle moves along the rotating orbit of a radius R around the central axis A of the main spindle 12 and the joint part 20a of the first member 20 to be joined and the second member 21 to be joined come into contact nearly continuously with each other and therefore the generating efficiency of the friction heat in the joint part 20a and 21a in good and these members can be efficiently friction pressure welded even if the joint part 20a of the first member to be joined is not continuous in the circumferential direction around the central axis at the main spindle 12 and even if the joint part is the non-circular shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a friction welding apparatus.

[0002]

2. Description of the Related Art As a joining apparatus for joining members to be joined,
Friction welding machines are known. The friction welding machine, for example, fixes the second member to be joined, and rotates the first member to be joined, and presses the second member to be joined to the first member to be joined. The second member is joined by frictional heat. In such a friction welding machine, a driving force of a motor or the like is transmitted to a main shaft via an input pulley or the like. Then, the rotational force of the main shaft is transmitted to the first member to be joined. Here, the rotation center axis of the main shaft and the rotation center axis of the first member to be joined are coaxially arranged. For this reason,
The first member to be joined is pressed against the second member to be joined while performing a rotational movement about the rotation center axis of the main shaft.

[0003]

When the first member to be joined is caused to rotate around the rotation center axis of the main shaft, it may not be possible to join the members depending on the shape and structure of the members to be joined. For example, the joining surface (joining portion) of the first member to be joined is not continuous in the circumferential direction around the rotation center axis of the main shaft (see FIG. 5), or the joining surface of the first member to be joined. This is the case where the (joining portion) is polygonal (see FIG. 8).
In such a case, when the main shaft rotates, the joining surface of the first member to be joined and the joining surface of the second member to be joined (the joining surface to which the first member to be joined) are continuously formed. Do not touch. First
If the joining surface of the member to be joined does not continuously contact the joining surface of the second member to be joined, the efficiency of generating frictional heat at the joining surface of the second member to be joined becomes poor, and the first and second members are not joined. Friction welding efficiency of the members to be joined is reduced. The present invention has been conceived in order to solve such a problem, and is efficiently applied even when the joined portions of the joined members are not continuous in the circumferential direction or have a non-circular shape. An object of the present invention is to provide a friction welding device capable of friction welding a joining member.

[0004]

According to a first aspect of the present invention, there is provided a friction welding apparatus as set forth in claim 1. In the friction pressure welding device according to the first aspect, the device moves in a state where rotation is suppressed. Accordingly, even when the first member to be joined is not continuous in the circumferential direction or has a non-circular shape, the contact between the joint surface of the first member to be joined and the joint surface of the second member to be joined can be achieved. Since the time becomes longer (substantially continuous contact), the efficiency of generating frictional heat is improved. Further, a second invention is a friction welding device as described in claim 2. In the friction welding apparatus according to the second aspect, since the center axis of the rotation shaft is eccentric with respect to the rotation center axis of the main shaft, the movement range of the second member to be joined can be widened. Further, a third invention is a friction welding device as described in claim 3. In the friction welding device according to the third aspect, the rotation suppressing member is constituted by a plurality of elastic members having one end attached to the holding means and the other end attached to the bed of the friction welding device. Thereby, the configuration is simple. A fourth invention is a friction welding device as described in claim 4. In the friction welding device according to the fourth aspect, the elastic member is formed by a spring. For this reason, the structure is further simplified. Further, a fifth invention is a friction welding device as described in claim 5. In the friction welding apparatus according to the fifth aspect, the holding means has a bearing. This simplifies the configuration with a small size.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described with reference to FIGS. FIG. 1 is a sectional view of a friction welding apparatus 1 according to an embodiment as viewed from the front. FIG. 2 shows a side view of FIG. 1 as viewed from the direction of arrows CC. FIG. 3 is a schematic view showing the main shaft 12 of the friction welding device 1 for rotating the first member 20 to be joined. FIG. 4 is a perspective view of the wire spring 16. 5A shows an example of the first member to be joined 20, FIG. 5B shows an example of the second member to be joined 21, and FIG.
c is a diagram showing a state where the first member to be joined 20 and the second member to be joined 21 are joined. FIG. 6 is a schematic diagram showing the locus of the center axis B of the first member to be joined 20 when the main shaft 12 rotates. FIG. 7 shows the first and second members to be joined 2.
It is a flowchart figure which shows the method of friction-welding 0, 21. In the following, the first member to be joined 20 and the second member to be joined 21 are joined by frictionally pressing the second member to be joined 21 while the first member to be joined 20 is rotated. The case in which it is performed will be described.

The friction welding apparatus 1 has a spindle column 3 on a bed 2. A spindle 12 is rotatably mounted on the spindle column 3 via a bearing. The driving force of the motor 8 is transmitted to the main shaft 12 via the output pulley 9 connected to the output shaft of the motor 8, the belt 10, and the input pulley 11 connected to the main shaft 12. As shown in FIGS. 1 and 3, at one end of the main shaft 12 (the right end in FIGS. 1 and 3), a chuck 14 for holding a first member to be joined 20 is provided with a bearing 13. It is rotatably mounted via. As shown in FIG. 3, the main shaft 12 has an end on the other side (an end on the side to which the driving force of the motor 8 is transmitted via the input pulley 11) (an end on the left side in FIGS. 1 and 3). Central axis A
Is formed in a crank shape such that the center axis B at one end is eccentric. The central axis B is eccentric with respect to the central axis A by an eccentric amount R. The first member to be joined 20 is attached to the chuck 14. As a result, the first member to be joined 20 rotates the first member to be joined 20 along a rotation trajectory having a radius R (amount of eccentricity R) about the center axis A.

Further, two wire springs 16 are provided between the chuck 14 and the floor 15 provided on the bed 2. The wire spring 16 has two flat bars (flat plates) 17, as shown in FIG. A plurality of holes 18 are formed on the side surface of the flat bar 16,
A wire 19 is spirally wound around a hole 18 of the flat bar 16. One flat bar (flat plate) 17 is screwed to the chuck 14 (not shown).
Installed in. The other flat bar (flat plate) 16 is connected to the floor 15 by screwing (not shown). Thereby, the wire spring 16 is connected to the floor 1
5 is the fixed end, the chuck 14
Can be elastically deformed, with the side attached to the as a free end. That is, the chuck 14 is movable within the elastic deformation range of the wire spring 16 with respect to the two fixed mounting ends mounted on the floor 15. In addition,
When the main shaft 12 rotates, an external force such as a centrifugal force of the chuck 14 acts in a direction in which the two flat bars 17 oppose each other, and one flat bar 17 is acted on the other flat bar 17.
Acts in the thrust direction. In order to prevent this, the wire spring 16 is connected to the flat bar 17
The wire 19 is wound with its winding direction reversed with the boundary near the center in the longitudinal direction.

On the other hand, the second member 21 is fixed by the clamp 5 attached to the table 4. The table 4 is movable by a hydraulic means 7 in a front-rear direction (left-right direction in FIG. 1) with respect to a slide portion 6 provided on the bed 2. The pressurizing force (pressing force) between the first member 20 and the second member 21 is adjusted by the hydraulic means 7. The friction welding device 1 includes
Control means for controlling each part of the friction welding apparatus 1 (not shown)
Is provided.

FIG. 7 is a flow chart showing a method for frictionally pressing the first member 20 and the second member 21 by using the friction welding device 1 having the above-described structure. It will be described using FIG. In the following, a member having a plurality of projecting joints as shown in FIG. 5A is used as the first member to be joined 20, and
A case where a plate-shaped member as shown in FIG. 5B is used will be described. Now, it is assumed that the table 4 is located at the standby position. First, in step S1, the first and second members to be joined 20, 21 are attached. For example, the first member 20 is gripped by the chuck 14, and the second member 21 is fixedly held by the clamp 5. Next, in step S2, the table 4 is advanced. For example, hydraulic means 7
To move the table 4 in the forward direction (to the left in FIG. 1). Next, in step S3, the first member 20 and the second member 21 are brought into contact with each other. For example, the hydraulic means 7 is controlled to control the pressing force of the first member 20 and the second member 21 to a predetermined value P1. Thus, the first member 20 and the second member 21 are brought into contact with each other.

Next, in step S4, the main shaft 12 is rotated. For example, the motor 8 is rotated to rotate the main shaft 12 at a predetermined rotation speed N (rpm). At this time, since the center axis A and the center axis B are eccentric by the amount of eccentricity R, when the main shaft 12 rotates, the center axis B becomes a radius R about the center axis A.
Rotates along the rotation trajectory of. The chuck 14 provided at the end of the main shaft 12 on the side of the center axis B
A force that rotates along the rotation trajectory acts. However, the chuck 14 is connected to the floor 1 by the wire spring 16.
5 and is rotatably attached to the main shaft 12 via a bearing 13. For this reason, as shown in FIG. 6, the first member to be joined 20 held by the chuck 14 does not rotate (for example, keeps substantially the same posture) and has a radius around the center axis A. It moves along the rotation locus of R. As a result, the joint 20a of the first member 20 and the joint 21a of the second member 21 come into contact almost continuously. Next, step S5
Then, heat is generated by friction. For example, when the main shaft 12 is rotated at a predetermined rotational speed N
While rotating at (rpm), the hydraulic means 7 is controlled to increase the pressing force of the first member 20 and the second member 21 from P1 to P2. Then, the main shaft 12 is rotated at the pressure P2 for a predetermined time t1. As a result, frictional heat is generated at the joint 20a of the first member 20 and the contact portion 21a of the second member 21, and the first member 20 and the second member 21 are frictionally rubbed. It is pressed. Next, in step S6, the rotation of the motor 8 is stopped, and the rotation of the main shaft 12 is stopped. Next, in step S7, in response to the stop of the rotation of the motor 8, the pressing force from P2 is applied to the contact portions 20a and 21a of the first member 20 and the second member 21 in the molten state. Raised to P3,
The pressure P3 is applied for a predetermined time t2 (upset pressurization). Next, in step S8, the first member to be joined 20 is removed from the chuck 14, and the hydraulic means 7 is controlled to move the table 4 backward to the standby position. Next, step S
At 9, the second member 21 (the state shown in FIG. 5c) to which the first member 20 is friction-welded is taken out of the clamp 5, and the friction welding process is completed.

As described above, in the present embodiment, when the first member 20 and the second member 21 are brought into frictional pressure contact with each other, as shown in FIG. Instead of rotating, it moves along a rotation trajectory of radius R about the center axis A of the main shaft 12. As a result, the joining surface (joining portion) 20a of the first member to be joined 20 and the second member to be joined 21 are almost continuously in contact with each other.
The generation efficiency of frictional heat at 0a and 21a is improved, and the pressing efficiency is improved. For this reason, even when the joining surface (joining portion) 20a of the first member to be joined 20 is not continuous in the circumferential direction around the rotation center axis of the main shaft 12 or has a non-circular shape, the second joining member 20a has the same shape. The first member to be joined 20 and the second member to be joined 21 can be efficiently friction-welded.

The present invention is not limited to the above-described embodiment, and may be appropriately changed without departing from the gist of the present invention. For example, the configuration, structure, and operation of the friction welding device 1 of the present invention are not limited to the embodiment. Further, the rotation of the main shaft 12 causes the first member 2
0, and the second member 21 is fixed by the clamp 5. However, the first member 20 may be fixed and the second member 21 may be rotated, or the first and second members 21 may be rotated.
May be rotated. In addition, although the wire spring 16 is used as the rotation suppressing member for suppressing the rotation of the first member to be joined 20, the structure of the rotation suppressing member is as follows.
For example, an elastic member such as rubber or a telescopic member such as a cylinder may be used. When a telescopic member such as a cylinder is used, both ends are rotatably mounted. The chuck 14 is rotatably mounted on the main shaft 12 via a bearing 13.
May be omitted, and the outer peripheral surface of the spindle 12 and the inner peripheral surface of the chuck 14 may be rotatable sliding surfaces. Further, the elastic member used as the rotation suppressing member is configured by using the wire spring 16 in which the wire 19 is wound around the two flat bars 17,
The configuration and structure of the elastic member can be variously changed. Also,
Although the method for joining the members to be joined using the friction welding apparatus 1 has been described with reference to the flowchart shown in FIG. 7, the method for joining is not limited to this. In addition, the chuck 14 has a center axis A at the other end on the side to which the driving force is transmitted.
Although the center axis B at one end where the is provided is eccentric by the amount of eccentricity R, the center axis B does not have to be eccentric with respect to the center axis A. Further, in the present embodiment, the joining surface (joining portion) between the first member to be joined 20 and the second member to be joined 21.
Although the case where 20a and 21a are not continuous in the circumferential direction about the rotation center axis of the main shaft 12 has been described, the joining surface (joining portion) between the first member to be joined and the second member to be joined is described.
However, for example, as shown in FIGS. 8A and 8B, the shape may be non-circular, and the shape of the joining surface (joining portion) between the first member to be joined and the second member to be joined can be variously changed. is there.
FIG. 8A shows a case where a joining surface (joining portion) between the first member 50 and the second member 51 is formed in a substantially U-shape. In FIG. 8B, the first member 70 and the second
In this case, the joining surface (joining portion) with the joined member 71 is formed in a triangular shape.

[0013]

As described above in detail, when the friction welding apparatus of the present invention is used, the joining surfaces (joining portions) of the members to be joined are continuous in the circumferential direction around the rotation center axis of the main shaft, for example. Even when there is no joining, or when the joining surface (joining portion) of the members to be joined is formed in a polygonal shape, etc., the friction welding can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention as viewed from the front.

FIG. 2 shows a side view of FIG. 1 as seen from the direction of arrows CC.

FIG. 3 is a diagram showing a main shaft for rotating a first member to be joined;

FIG. 4 shows a perspective view of a wire spring.

5A shows an example of a first member to be joined, and FIG.
FIG. 5B shows an example of a second member to be joined, and FIG. 5C shows a state where the first member to be joined and the second member to be joined are joined.

FIG. 6 is a schematic diagram showing a locus of a center axis B of a first member to be joined when the main shaft rotates.

FIG. 7 is a flowchart illustrating a method of friction-welding the first and second members to be joined.

FIG. 8A shows an example of friction welding when the joining surfaces (joining portions) of both members to be joined are formed in a substantially U-shape;
b is a diagram showing an example of friction welding when the joining surfaces (joining portions) of both members to be joined are formed in a triangular shape.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Friction welding apparatus 12 ... Spindle 13 ... Bearing 14 ... Chuck 16 ... Wire spring 20 ... First member to be joined 21 ... Second member to be joined

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 4E067 BG02 CA01

Claims (5)

[Claims] 1. A friction welding device for friction-welding a first member to be joined and a second member to be joined, wherein: a main shaft driven to rotate; a rotating shaft connected to the main shaft; A friction welding device comprising: holding means for rotatably holding a member on a rotating shaft; and rotation suppressing means for suppressing rotation of the holding means. 2. The friction welding apparatus according to claim 1, wherein a center axis of the rotation shaft is coaxial with the rotation center axis of the main shaft and is eccentric. 3. The friction welding apparatus according to claim 1, wherein the rotation suppressing means includes a plurality of elastic members each having one end attached to the holding means and the other end attached to a bed of the friction welding apparatus. A friction welding device that is configured. 4. The friction welding apparatus according to claim 3, wherein the elastic member is a spring. 5. The friction welding apparatus according to claim 1, wherein the holding means has a bearing.