JP2000071082A - Device and method for friction pressure welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a friction pressure welding device which can friction pressure weld both short and long intermediate works and reduce the manufacturing cost. SOLUTION: A linear guide rail 12 is installed on a facility base 11 of a friction pressure welding device 10. A first main shaft box 13a is movably installed on one end side of the linear guide rail 12. Additionally, a second main shaft box 14a is movably installed on the other end side of the linear guide rail 12. A main shaft 13b of the first shaft box 13a is drive-connected to the servo motor 13d, and a main shaft 14b of the second main shaft box 14a is drive-connected to an induction motor 14d. Furthermore a work clamp 20 is movably installed on the linear guide rail 12 between the first and second main shaft boxes 13a and 14a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction welding apparatus for welding works by a friction welding method.

[0002]

2. Description of the Related Art Conventionally, a friction welding method is well known as a technique for joining works. This is a method in which a workpiece to be joined is brought into contact, a relative motion is caused on the contact surface while applying pressure, and the vicinity of the joint surface is heated and pressed by friction heat generated. This friction welding method has features such as being able to perform welding between dissimilar metals, consuming less material and electricity, and being excellent in productivity and joining accuracy. At present, it is widely applied as a welding method for mass production, particularly to materials such as rods and pipes.

FIGS. 4 to 6 show three works W11 and W1.
2 shows a conventional friction welding apparatus that frictionally welds W13.
In FIG. 4, the upper surface 3 of the equipment base 30 of the friction welding device is shown.
0a is a work surface, and the upper surface 30a has first and second work surfaces.
Linear guides 34 and 40 extend in the longitudinal direction (Y direction). When the first spindle unit 31 is the first linear guide 3
4, a second spindle unit 32 is installed on the second linear guide 40, and the two spindle units 31, 32 are movable along the linear guides 34, 40, respectively.

The first and second spindle units 31, 32 are provided with spindles 31a, 32a rotatably.
The spindles 31a, 32a are connected to the rotary servomotor 3 via gears 31c, 32c arranged in the spindle boxes 31b, 32b.
It is drivingly connected to 1d and 32d. Spindles 31a, 32
Chucks 31e and 32e are attached to the tip of a, and fix the works W12 and W13, respectively.

On the lower surfaces of the first and second spindle units 31, 32, arms 35, 39 projecting into the equipment base 30.
Is provided. Ball screws 37 and 38 as press-contact feed shafts driven by slide servomotors 36 and 41 are screwed to the arms 35 and 39. When the ball screws 37 and 38 are rotated forward and backward, the first and second spindle units 31 and 32 move in the Y direction by the propulsive force generated between the ball screws 37 and 38 and the arms 35 and 39.

[0006] A fixed clamp 42 and a movable clamp 43 for holding the work W11 are arranged between the first and second spindle units 31 and 32. The fixed clamp 42 has its legs 42 a fixed to the upper surface 30 a of the equipment base 30. As shown in FIG. 6, the fixed clamp 42 has a pair of clamping arms 42b and 42c on the upper part of the leg 42a.
It has. The holding arms 42b and 42c move in a direction (front-back direction) orthogonal to the Y direction with respect to the legs 42a to hold and fix the work W11.

The leg 43a of the movable clamp 43 is mounted on the second linear guide 40. The leg 43a of the moving clamp 43 is moved along the second linear guide 40 in the Y direction.
And is fixed at a predetermined position. As shown in FIG. 6, the movable clamp 43 has a pair of clamping arms 43b and 43c above the leg 43a. The holding arms 43b and 43c are connected to the leg 43a by Y.
Work W11 moves in the direction (front-back direction) perpendicular to the direction
And fix it.

The center axis of the work W11 clamped and fixed by the fixed clamp 42 and the movable clamp 43 is:
Spindles 31a, 3 of the first and second spindle units 31, 32
The center axes of the workpieces W12 and W13 fixed to the chucks 31e and 32e provided on the base 2a (the center axes of the main shafts 31a and 32a) coincide with each other.

When friction welding of, for example, three works W11, W12 and W13 is performed by the friction welding apparatus configured as described above, first, as shown in FIGS. Linear guides 34, 4
The workpieces W12 and W13 on both sides of the intermediate workpiece W11 are fixed to a fixed clamp 42 fixedly provided at a predetermined position between 0 and a movable clamp 43 movably disposed on the second linear guide 40, respectively. The spindles 31a and 32a are fixed to chucks 31e and 32e. At this time, in order to support and fix the intermediate work W11 in a well-balanced manner, the relative distance between the movable clamp 43 and the fixed clamp 42 is adjusted by moving the movable clamp 43 according to the length L5 of the intermediate work W11.

The main shafts 31a and 32a are driven to rotate by the rotation servomotors 31d and 32d, respectively, so that the workpieces W12 and W13 are rotated at a predetermined rotation speed. The slide servo motors 36, 4
1, when the ball screws 37, 38 are driven to rotate in a predetermined rotation direction, the first and second spindle units 31, 32 are rotated.
Is a workpiece W via arms 35 and 39, respectively.
11 is translated in the Y direction. Then, when the workpieces W12 and W13 to be rotated are brought into contact with the workpiece W11 that does not rotate from both ends, the workpieces W11 and W1 are contacted.
2 and the joint between the work W11 and the work W13, frictional heat is generated.
The joint between W12 and W13 is softened. When the upsetting is further applied while the rotation of the workpieces W12 and W13 is stopped after the softening is advanced to a desired state, the joints of the three workpieces W11, W12 and W13 are integrated and welded to each other as they sink into each other. You.

During the above process, it is necessary to adjust the phase between the works W12 and W13 in order to accurately assure the relative position of the work W11 in the rotational direction between the works W12 and W13. The phase adjustment between the works W12 and W13 is performed by the first driving of the works W12 and W13, respectively.
And the servo motor 31 of the second spindle units 31 and 32
d, 32d. That is, during the friction welding operation, the rotational stop positions of the servo motors 31d and 32d of the first and second spindle units 31 and 32 are controlled so that the rotational stop positions of the workpieces W12 and W13 with respect to the respective workpieces W11, that is, the phases. Can be combined.

[0012]

In the friction welding apparatus constructed as described above, three works W11,
When W12 and W13 are friction-welded together,
The minimum length in the axial direction (Y direction) of the intermediate workpiece W11 that can be subjected to friction welding is the first and second spindle units 31, 32.
Fixed and moving clamp 4 installed in parallel in the Y direction between
2, 43 are determined from the width in the axial direction (Y direction). Therefore, as shown in FIG. 4, the width of each of the clamps 42 and 43 in the axial direction (Y direction) is set to L4, and the intermediate work W11 is formed.
Assuming that the length in the axial direction (Y direction) is L5, if L5 is longer than twice L4, the three workpieces W11, W12, and W13 can be friction-welded integrally by this friction welding device. In other words, in this friction welding device, the workpieces W12 and W13 cannot be friction-welded from both ends to the intermediate workpiece W11 that is not longer than twice the length L4.
That is, there is a problem that the friction welding process cannot be performed on the short intermediate work W11.

Therefore, one of the clamps 42, 43, for example, the fixed clamp 42 is omitted, and the short intermediate work W11 is fixed only by the moving clamp 43, so that the frictional welding process on the short intermediate work W11 is performed. It is possible to do. However, when performing friction welding on a long intermediate work W11 that is much longer than the moving clamp 43 with the same friction welding device, when fixing the long intermediate work W11 with only the moving clamp 43, One end or both ends of W11 protrude long from the movable clamp 43. For this reason, the first and second
Work W12 fixed by the spindle units 31 and 32,
When W13 is simultaneously subjected to friction welding to both ends of the intermediate work W11, the one or both ends of the long projecting intermediate work W11 are shaken. Due to the deviation, the processing accuracy of the friction welding processing is reduced. Therefore, in the friction welding process on the long intermediate workpiece W11 by the friction welding device having only one clamp, the machining accuracy cannot be secured. In other words, there is a problem that both the short and long intermediate workpieces W11 cannot be subjected to friction welding with the conventional friction welding device.

A first object of the present invention is to provide a friction welding apparatus and a friction welding method capable of friction welding both short and long intermediate works. Second embodiment of the present invention
An object of the present invention is to provide a friction welding device that can reduce the manufacturing cost.

[0015]

According to a first aspect of the present invention, a pair of left and right first and second spindle mechanisms are provided on a linear guide member provided on an equipment base. Work clamp means are movably installed on the equipment base between the first and second spindle mechanisms movably installed, respectively, and the first and the second linear guide members are moved along the linear guide member by the slide drive mechanism. In a friction welding apparatus in which a second spindle mechanism is slid and frictionally welded between a workpiece clamped to a workpiece clamping means and a workpiece clamped to a spindle of the first and second spindle mechanisms, the work clamping means includes: The gist should be one work clamp.

According to a second aspect of the present invention, in the friction welding apparatus according to the first aspect, one of the motors for driving the main shafts of the first and second main shaft mechanisms is a servo motor, and the other is a servo motor. The gist is that a motor other than the servo motor is used as the motor.

According to a third aspect of the present invention, there is provided a friction welding method for performing friction welding using the friction welding apparatus according to the first aspect, wherein one of the first and second spindle mechanisms is provided with one of the first and second spindle mechanisms. The point is that when performing friction welding, the other spindle mechanism is a stopper that restrains the axial movement of the work clamped and fixed by the work clamp.

According to a fourth aspect of the present invention, there is provided a friction welding method for performing friction welding using the friction welding apparatus according to the second aspect, wherein a motor other than the servomotor is used for the first and second spindle mechanisms. After the first friction welding process is performed by one spindle mechanism having the main shaft driven by the servomotor, the second friction welding process is performed by the other spindle mechanism having the main shaft driven by the servomotor. That is the gist.

(Operation) According to the first aspect of the present invention,
It is capable of joining short intermediate workpieces to long intermediate workpieces and a wide range of intermediate workpieces, and manufactures a smaller amount than conventional friction welding equipment equipped with two workpiece clamps, a fixed clamp and a moving clamp. Cost can be reduced.

According to the invention described in claim 2, according to claim 1,
In addition to the above-described operation, one of the motors for rotating and driving the main shafts of the first and second main shaft mechanisms is a motor other than the servo motor, so that both the motors for driving the main shafts of the first and second main shaft mechanisms are used. In addition, the manufacturing cost of the friction welding device can be reduced as compared with a conventional device using a servomotor.

According to the invention described in claim 3, according to claim 1 of the present invention,
In addition to the effect of (1), it is not necessary to use a special stopper member, so that the manufacturing cost can be reduced, and the provision of the special stopper member makes the friction welding device more complicated in structure. There is no.

According to the invention described in claim 4, claim 2 is provided.
In addition to the operation described above, one of the first and second spindle mechanisms having a spindle driven by a motor other than the servomotor performs the first friction welding process with one spindle mechanism, and then is driven by the servomotor. The second friction welding process is performed by the other spindle mechanism having the main spindle. When the workpieces are friction-welded to both ends of the intermediate work held by one work clamp, respectively, the work between the two ends of the work is clamped. The joining can be performed with the position in the rotating direction accurately adjusted.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 3, a friction pressure welding device 10 according to the present embodiment includes a linear guide rail 1 as a linear guide member including two tracks parallel to each other on an upper surface 11 a of an equipment base 11.
2 are provided.

On one end side (left end side in FIGS. 1 and 3) of the linear guide rail 12, a first spindle unit 1 is provided.
A first spindle box 13a as a third spindle mechanism is movably installed along the linear guide rail 12. Also,
On the other end side (the right end side in FIGS. 1 and 3) of the linear guide rail 12, a second spindle box 14 a as a spindle mechanism of the second spindle unit 14 is provided with a linear guide rail 1.
2 so as to be movable along.

The first spindle unit 13 includes a spindle 13
b is provided rotatably. The main shaft 13b is connected to the first main shaft box 13a via a gear 13c.
Rotating servomotor 13d fixed on spindle box 13a
And drive-coupled. A chuck 13e is attached to the tip of the main shaft 13b.

The bottom surface 13f of the first spindle box 13a
Has an arm 13g protruding therefrom. Arm 13
A through hole 13h is provided at the tip of g. When the first spindle box 13a is movably installed on the linear guide rail 12, the arm 13g is
It is built into the equipment base 11.

As shown in FIG. 1, the through holes 13h are
A ball screw 16 as a slide drive mechanism is screwed. When the ball screw 16 is rotated, the arm 1
3g (first spindle box 13a) linearly moves along the ball screw 16 (linear guide rail 12).

A base end of the ball screw 16 is drivingly connected to a rotating shaft of a slide servomotor 17 fixed to an outer surface (the left side surface in FIGS. 1 and 3) of the equipment base 11.

The second spindle unit 14 includes a spindle 14
b is provided rotatably. As shown in FIGS. 1 and 2, a pulley P1 is fixed to the base end of the main shaft 14b. An induction motor 14d as a motor other than the servomotor is fixed to the second spindle box 14a, and a pulley P2 is fixed to an output shaft of the induction motor 14d. The pulley P1 and the pulley P2 are drivingly connected via a belt 14c.
A chuck 14e is attached to a tip of the main shaft 14b.

The bottom surface 14f of the second spindle box 14a
Has an arm 14g protruding therefrom. Arm 14
A through hole 14h is provided at the tip of g. When the second spindle box 14a is movably installed on the linear guide rail 12, the arm 14g
The main shaft 14b is provided inside the equipment base 11, and the center axis of the main shaft 14b coincides with the center axis of the main shaft 13b of the first main unit 13 installed on the linear guide rail 12. Has become.

As shown in FIG. 1, the through hole 14h is
A ball screw 18 as a slide drive mechanism is screwed. When the ball screw 18 is rotated, the arm 1
4g (second spindle box 14a) linearly moves along the ball screw 18 (linear guide rail 12).

A base end of the ball screw 18 is drivingly connected to a rotation shaft of a slide servomotor 19 fixed to an outer surface (the right side surface in FIGS. 1 and 3) of the equipment base 11.

A work clamp 20 as work clamp means is arranged between the first and second spindle units 13 and 14. The work clamp 20 has its legs 20 a mounted on the linear guide rail 12 so as to be movable in the Y direction along the rail 12. Work clamp 20
As shown in FIGS. 2 and 3, a pair of clamping arms 20b and 20c are provided above the leg 20a. The holding arms 20b and 20c move in the direction (front-back direction) orthogonal to the Y direction with respect to the legs 20a, and move the work W1.
And fix it.

Next, the operation of the friction welding apparatus 10 configured as described above will be described. This friction welding device 10
In the case where three works, for example, works W1, W2, and W3 are friction-welded together, the work W2 and W3 are separately friction-welded to both ends of the intermediate work W1 step by step.

More specifically, as shown in FIGS. 1 and 3,
When the length of the intermediate work W1 is L2, and the length L2 is slightly longer than the width L3 in the axial direction (Y direction) of the clamping arms 20b, 20c, the center of the intermediate work W1 is attached to the work clamp 20. Hold and fix. Further, the work W2 is clamped and fixed to the chuck 13e of the first spindle unit 13, and the work W3 is clamped and fixed to the chuck 14e of the second spindle unit 14. Next, the first spindle unit 13 to which the work W2 is fixed is slid so that the work W2 comes into contact with the intermediate work W1. That is, the first spindle box 13a of the first spindle unit 13 is fixed to the work W
2 is a stopper for restraining the movement of the intermediate work W1 clamped and fixed by the work clamp 20 through the work clamp 20 in the axial direction (Y direction).

Next, the main shaft 14b is driven to rotate by the motor 14d, thereby rotating the work W3 at a predetermined number of rotations while moving the work W3 toward the intermediate work W1.
Slide in the direction. When the rotating work W3 is brought into contact with the non-rotating intermediate work W1, both works W1 and W1 are rotated.
Friction heat is generated at the joint of W3, and the joint of the two works W1 and W3 is softened by the frictional heat. When the upsetting is further applied while the rotation of the work W3 is stopped after the softening is advanced to a desired state, the joints of the two works W1 and W3 are integrated and welded so as to be entangled with each other.

After the friction welding of both works W1 and W3 is completed,
The clamping arms 20b and 20c of the work clamp 20 for fixing the intermediate work W1 are loosened, and the spindle 14b
The rotational orientation stop position of the workpieces W1 and W3, which have been friction-welded, is detected by detecting the rotational stop position of the spindle 14b provided on the main shaft 14b. And work W again
1 is fastened and fixed by the holding arm portions 20b and 20c. On the other hand, the first spindle unit 13 to which the work W2 is fixed is slid so as to return to a predetermined position.

Next, the main shaft 13b is driven to rotate by a rotation servomotor 13d, so that the work W
2 is rotated at a predetermined rotation speed. With it, the first
The main shaft unit 13 is slid in the Y direction toward the workpiece W1 by the ball screw 16 being rotationally driven by the slide servomotor 17 in a predetermined rotation direction. When the rotating work W2 is brought into contact with the end surface of the non-rotating intermediate work W1, frictional heat is generated at a joint between the two works W2 and W1, and the frictional heat causes the two works W2 and W1 to move.
The joint of W1 is softened. After the softening is advanced to a desired state, the rotation of the work W2 is controlled by the servo motor 13d to the work W3 determined by the spindle orientation.
When the upset pressure is further applied while stopping at the stop position where the phases have been adjusted, the joined portions of the two works W2 and W1 are integrated and welded so as to be engaged with each other. Then, the works W1, W2, and W3 are integrally friction-welded.

Accordingly, the friction welding apparatus 10 of the present embodiment
The work W2 and the work W3 can be joined to a short intermediate work W1 that cannot be pinched and fixed by the fixed clamp 42 and the moving clamp 43 of the conventional friction welding device. In addition, the work W2 and the work W3 can be joined while being accurately aligned in the rotational direction.

Next, a case where the work W2 and the work W3 are joined to a long intermediate work W1 shown by a two-dot chain line in FIG. 1 will be described. Now, assume that the length of the intermediate work W1 is L1, and L1 is much longer than the width L3 in the axial direction (Y direction) of the holding arms 20b, 20c. First, as shown in FIGS. 1 and 3, one end (the right end indicated by a two-dot chain line in the drawing) of the intermediate work W1 is clamped and fixed to the work clamp 20. When performing the clamping and fixing, the amount by which the intermediate work W1 protrudes from the work clamp 20 to the right is set to a length that does not shift during friction welding.

Next, during the friction welding process, the work clamp 2
In order to restrict the axial movement of the intermediate work W1 pinched and fixed by 0, the first spindle unit 13 is brought into contact with the other end (left side) of the intermediate work W1 with the work W2 pinched and fixed to the chuck 13e. Slide to. Further, the work W3 is clamped and fixed to the chuck 14e of the second spindle unit 14.

Next, the main shaft 14b is driven to rotate by the motor 14d, thereby rotating the work W3 at a predetermined rotation speed. At the same time, the ball screw 18 slides the second spindle unit 14 on the servomotor 1 for sliding.
By being rotationally driven in a predetermined rotation direction by 9, it is slid in the Y direction toward the intermediate work W1. The rotating workpiece W3 is replaced with the non-rotating intermediate workpiece W1.
, Frictional heat is generated at the joint between the two works W1 and W3, and the frictional heat softens the joint between the two works W1 and W3. When the upsetting is further applied while the rotation of the work W3 is stopped after the softening is advanced to a desired state, the joints of the two works W1 and W3 are integrated and welded so as to be entangled with each other.

After the friction welding of the two works W1 and W3 is completed,
The clamping arms 20b and 20c of the work clamp 20 for fixing the intermediate work W1 are loosened, and the work clamp 20 is fixed.
Is the other end of the intermediate work W1 (the left end shown by a solid line in the figure)
And move it to the corresponding position. First spindle unit 1
3 is slid so as to return to a predetermined position. At the same time, the rotational direction stop position of the main shaft 14b provided on the main shaft 14b is detected, and the main shaft orientation of the rotational direction stop positions of the works W1 and W3 is performed. And
The clamping arms 20b and 20c are tightened again to clamp and fix the other end (the left end indicated by the solid line in the drawing) of the intermediate work W1. At this time, the intermediate work W1 is
The amount projecting to the left from 0 is set to a length that does not shift during friction welding.

Next, the main shaft 13b is driven to rotate by a rotation servomotor 13d, whereby the work W2 clamped and fixed to the chuck 13e is rotated at a predetermined rotation speed. At the same time, the first spindle unit 13
The ball screw 16 is used as a servomotor 17 for sliding.
By being driven to rotate in a predetermined rotation direction by
It is slid in the Y direction toward the work W1. When the rotating work W2 is brought into contact with the left end face of the non-rotating intermediate work W1, frictional heat is generated at the joint between the two works W2 and W1, and the frictional heat softens the joint between the two works W2 and W1. You. After the softening is advanced to the desired state, the rotation of the work W2 is stopped by the servo motor 13d at the stop position in phase with the work W3 determined by the spindle orientation, and further upset pressure is applied. , W1 are integrated and welded in such a way that they are mutually engaged. Then, the works W1, W2, and W3 are integrally friction-welded.

Therefore, the friction welding apparatus 10 of the present embodiment
Can join the work W2 and the work W3 to the long intermediate work W1. Moreover, the work W2
And the position of the workpiece W3 in the rotational direction can be accurately aligned and joined.

Next, features of the friction welding apparatus 10 according to the present embodiment configured as described above will be described. (1) In the present embodiment, one friction welding device 10 is used to move the work W2 and the work W3 in the rotational direction with respect to the short intermediate work W1 to the long intermediate work W1 and a wide range of intermediate work W1. Can be accurately matched and joined.

(2) In the present embodiment, the second spindle unit 14 is provided with the induction motor 14d, and the spindle 14b (work W3) is rotated by the induction motor 14d. That is, the second spindle unit 14
Is a servo motor 13d provided in the first spindle unit 13.
A much cheaper induction motor 14d was used. Therefore, the manufacturing cost can be reduced as compared with the conventional friction welding device in which the first and second spindle units each include an expensive servomotor.

(3) In this embodiment, the intermediate work W1 is held and fixed by one work clamp 20.
Therefore, the manufacturing cost can be reduced by a small amount as compared with the conventional friction welding device having the fixed clamp and the movable clamp.

(4) In this embodiment, when the intermediate work W1 and the work W3 are joined, the first spindle unit 13 functions as a stopper, and the intermediate work W1 and the work W2 are joined together.
The second spindle unit 14 functions as a stopper when the two are joined. That is, the friction welding device 10 of the present embodiment does not use a special stopper member. Therefore, the manufacturing cost can be reduced, and
The provision of the stopper member does not cause the friction welding device to have a more complicated structure. As a result, the manufacturing cost of the friction welding device can be reduced.

(5) In the present embodiment, after joining the intermediate work W1 and the work W3 using the second spindle unit 14 having the induction motor 14d, the first spindle unit 13 having the servomotor 13d is used. Is used to join the intermediate work W1 and the work W2.
Therefore, the workpiece W2 and the workpiece W3 can be joined while being accurately aligned in the rotational direction.

The embodiment of the present invention may be modified as follows. The specific clamp structure, rotary structure, main shaft drive structure, slide structure, control method, and the like described in the above embodiment are not limited at all, and can be applied to friction welding devices having any structure. For example, the first and second spindle boxes 13
a, 14a for driving the ball screws 16 and 18 for horizontal movement
The slide servomotors 17 and 19 may be implemented as a hydraulic cylinder drive mechanism. The work clamp may be implemented as a fixed clamp. In this case, substantially the same effects as in the above embodiment can be obtained.

The encoder 14 may be provided on the main shaft 14b of the second main shaft unit 14 for performing the first friction welding to detect a stop position of the main shaft 14b in the rotation direction.
In this case, the stop position of the spindle 14b is detected by the encoder at the end of the first friction welding, and the phase between the workpieces W2 and W3 is determined by the first spindle unit 13 at the second friction welding based on the stop position. Perform alignment. In this case, substantially the same effects as in the above embodiment can be obtained, and the spindle orientation by the second spindle unit 14 can be omitted.

The motor for rotating the main shaft 14b of the second main shaft unit 14 may be a motor other than the induction motor, for example, an inexpensive DC motor. ○ The spindles 13b, 14 of the first and second spindle boxes 13a, 14a.
The motor that drives b may be a motor other than the servo motor and the induction motor. Also according to this, the operation and effect obtained by using one clamp and one work as a stopper can be obtained.

In the above embodiment, the main shaft 14b is driven and connected to the induction motor 14d via the pulleys P1 and P2 and the belt 14c. However, the main shaft 14b may be a gear. In this case, the same effect as in the above embodiment can be obtained.

The servo motor may be used as the induction motor 14d for rotating the main shaft 14b of the second main shaft unit 14. In this case, the effects (1), (3), and (4) of the above embodiment can be obtained.

The order of joining with the intermediate work W1 is
3 is not limited to the above, and the work W2 may be the first. The linear guide rails 12 are not limited to the structure in which the two spindle boxes and the clamp are moved by only one pair as in the above embodiment, and a plurality of separate rails may be used.

The linear guide member is not limited to a rail, but includes other structures and members such as a V-shaped groove. Next, technical ideas other than the inventions described in the claims that can be grasped from the embodiment and other examples will be described below together with their effects.

(1) A pair of left and right first and second spindle mechanisms are movably installed on a linear guide member provided on the equipment base, and the first and second main spindle mechanisms are respectively movably installed.
Work clamp means is installed on the equipment base between the first and second spindle mechanisms, and the first and second spindle mechanisms are slid along the linear guide member by the slide drive mechanism, and the workpiece clamped by the work clamp means. And a workpiece clamped to the spindles of the first and second spindle mechanisms, the workpiece clamping means is a single workpiece clamp, and the workpiece clamp is provided on an equipment base. Wherein the first and second spindle mechanisms and the linear guide member of the work clamp are the same linear guide member.

Therefore, it is possible to join a short intermediate work to a long intermediate work and a wide range of intermediate works, and it is possible to reduce the manufacturing cost of the friction welding apparatus.

[0060]

As described in detail above, according to the first aspect of the present invention, it is possible to join a short intermediate work to a long intermediate work and a wide range of intermediate works, and to perform friction welding. The manufacturing cost of the device can be reduced.

According to the second and third aspects of the present invention, the manufacturing cost of the friction welding apparatus can be reduced. According to the invention described in claim 4, both the short and long intermediate workpieces can be subjected to friction welding, and the workpieces to be joined to the intermediate workpiece from both ends are accurately aligned in the rotational direction and joined. be able to.

[Brief description of the drawings]

FIG. 1 is a front view of a friction welding apparatus according to an embodiment.

FIG. 2 is a right side view of the friction welding device in FIG. 1;

FIG. 3 is a plan view of the friction welding device.

FIG. 4 is a front view of a conventional friction welding apparatus.

FIG. 5 is a left side view in FIG. 4 of a conventional friction welding apparatus.

FIG. 6 is a plan view of a conventional friction welding apparatus.

[Explanation of symbols]

10: friction welding device, 11: equipment base, 12: linear guide rail as linear guide member, 13, 14 ...
1st, 2nd spindle unit, 13a, 14a ... 1st, 2nd spindle box as a spindle mechanism, 13b, 14b ... spindle, 13
d: servo motor; 14d: induction motor as motor other than servo motor; 16, 18: ball screw as slide drive mechanism; 17, 19: servo motor for slide. 20: Work clamp as work clamp means, W1 to W3: Work.

 ──────────────────────────────────────────────────続 き Continued from the front page (72) Inventor Osamu Ishikawa 1-3-3 Shimizu, Kitazaki-cho, Obu-shi, Aichi F-term within Fumi Kogyo Co., Ltd.

Claims (4)

[Claims] 1. A pair of left and right first and second spindle mechanisms are movably installed on a linear guide member provided on an equipment base, and the first and second spindle mechanisms are respectively movably installed. Work clamp means is installed on the equipment base between the first and second linear guide members by the slide drive mechanism.
And a second spindle mechanism is slidably driven to frictionally press a workpiece clamped on the workpiece clamping means and a workpiece clamped on the first and second spindle mechanisms of the first and second spindle mechanisms. A friction welding apparatus characterized by being one work clamp. 2. The friction welding apparatus according to claim 1, wherein one of the motors for rotating the main shafts of the first and second main shaft mechanisms is a servo motor, and the other motor is a motor other than the servo motor. A friction welding device characterized by using a motor. 3. A friction welding method for performing friction welding using the friction welding device according to claim 1, wherein the friction welding is performed by one of the first and second spindle mechanisms. And the other main spindle mechanism is a stopper for restraining the work in the axial direction of the work clamped and fixed by the work clamp. 4. A friction welding method for performing friction welding using the friction welding apparatus according to claim 2, comprising a main shaft driven by a motor other than a servo motor among the first and second main shaft mechanisms. A first friction welding process performed by one spindle mechanism, and a second friction welding process performed by the other spindle mechanism having a spindle driven by a servomotor. Method.