JPH07144287A - Friction pressure welding device - Google Patents

Abstract

PURPOSE:To provide a friction pressure welding device by which the joining of a tube and a holed flange and the treatment of internal burrs generating on the inner peripheral surface of a joint, can be performed at a time. CONSTITUTION:At a state in which the one side end face 20A of a tube 20 and the one side end face 22A of a flange 22 are in press-contact with each other, a joint part is melted by friction heat generating o the joint part by rotating the flange 22 held with a fixing chuck 34 at a high part speed, and the tube 20 and the flange 22 are allowed to joint. And within a time required for completely joining the joint, the burr treatment rod 42 of a burr treatment device, which rotates at a high speed, is allowed to move by sliding from the inside of a flange hole 22B to the inside of a tube hole 22B, and when the tube 20 and the flange 22 are joined, internal burrs 52 produced on the inner peripheral surface of the joint are crushed and removed by the burr treatment rod 42. Consequently, the joining of the tube 20 and the flange 22, and the internal burrs 52 produced on the peripheral surface of the joint can be treated at a time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction welding device, and more particularly, to melting a joint portion by friction heat generated in the joint portion by rotating the flange while the end surface of the pipe and the perforated flange are in pressure contact with each other. The present invention relates to a friction welding device for joining a pipe and a flange.

[0002]

2. Description of the Related Art When joining a pipe and a perforated flange with a conventional friction welding device, friction heat is generated at the joint by rotating the flange at a high speed while the end face of the pipe and the flange are in pressure contact with each other. Then, the joint is melted. Next, the rotated flange is rapidly stopped, and a larger pressure contact force (hereinafter referred to as "upset pressure") is applied to the pipe and the flange to maintain the upset pressure for a predetermined time, thereby joining the pipe and the flange. .

When the above joining operation is performed, burrs are generated on the outer peripheral surface and the inner peripheral surface of the joint when an upset pressure is applied. Therefore, after the pipe and the flange are joined, the burrs are removed by another burr treatment device. To do.

[0004]

However, in the case of the conventional friction welding device, the inner burr generated on the inner peripheral surface of the joint is treated by another burr treatment device after the pipe and the flange are joined. However, there is a drawback that the treatment process has two steps and the efficiency is low. Therefore, the working time becomes long, and both the friction welding device and the burr treatment device are required, so that the installation space of the device becomes large.

The present invention has been made in view of the above circumstances, and friction friction welding capable of simultaneously performing joining of a cylindrical member and a perforated flange and treatment of inner burrs generated on the inner peripheral surface of the joining portion. The purpose is to provide a device.

[0006]

According to the present invention, in order to achieve the above object, one of the cylindrical member and the flange is rotated while the end surface of the cylindrical member and the perforated flange are in pressure contact with each other. In a friction welding device for joining a cylindrical member and a flange by melting the joined part with frictional heat generated in the joined part by means of an outer peripheral surface of a rod-shaped member that can be inserted into the hole of the cylindrical member and the flange. A groove is formed in the longitudinal direction, and the burr formed on the inner peripheral surface of the joint is removed by slidingly moving in the hole of the cylindrical member and the flange while rotating the rod-shaped member.

[0007]

According to the present invention, with the end face of the cylindrical member and the perforated flange pressed against each other, frictional heat generated at the bonded portion by rotating either the cylindrical member or the flange causes the bonded portion to rotate. Is melted to join the cylindrical member and the flange. Then, until the joint is completely joined, the rod-shaped member having a groove in the longitudinal direction is rotated and slid in the hole of the cylindrical member and the flange to be formed on the inner peripheral surface of the joint. Remove the burr like crushing it. This makes it possible to join the cylindrical member and the flange together with the inner burr formed on the inner peripheral surface of the joined portion.

If a drill is used as the rod-shaped member,
The inner burr can be excised. Also, if the hole diameter of the flange is made smaller than the inner diameter of the cylindrical member, the inner burr crushed by the rod-shaped member is stored on the cylindrical member side of the stepped portion formed at the joint, so that the inner peripheral surface of the joint is smoothed. Can be

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a friction welding device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an explanatory view illustrating a first embodiment in which the cable friction welding device of the present invention is applied to join a pipe 20 and a flange 22.

The one end surface 20A of the pipe 20 and the one end surface 22A of the perforated flange 22 are arranged slightly apart from each other with the center lines of the pipe hole 20B and the flange hole 22B aligned. At this time, the pipe 20 is slidably supported by a support member 26 slidably provided on the slide base 24 at a substantially central portion thereof, and the other end face 20C is attached to a hydraulic guide 28 by a pressure guide. It is held at the tip of 30. As a result, when the hydraulic device 28 is activated to press the other end surface 20C of the pipe 20 with the pressing guide 30 by the arrow 32 in the figure, the pipe 20 moves in the direction of the flange 22 via the support member 26, and the one side of the pipe 20. One end face 2 of the end face 20A and the flange 22
2A is pressed. Since FIG. 1 is a view in the middle of joining the pipe 20 and the flange 22, the pipe 20 and the flange 22 are shown in abutment with each other.

On the other hand, the flange 22 has a flange hole 22B.
Fixed chuck 3 having a through hole 34A substantially the same as the inner diameter of
4, the fixed chuck 34 is connected to a rotating mechanism 36 mainly composed of a motor and a brake device. As a result, when the motor is started, the flange 22 held by the fixed chuck 34 rotates at high speed in the direction of the arrow 38 in the figure, and when the motor is stopped and the brake device is started, the flange 22 suddenly stops.

Next, a deburring device which is an improved part of the friction welding device of the present invention will be described. The deburring device mainly comprises a rotating / sliding mechanism 40 and a deburring rod 4 which rotates and slides by the rotating / sliding mechanism 40.
2 and. In addition, the burr processing rod 42
As shown in FIGS. 2 and 3, has a shape in which a plurality of grooves 42A are engraved in the longitudinal direction thereof, and as shown in FIG. 1, the through hole 34A of the fixed chuck 34 and the flange hole 22.
It is arranged with a slight gap 44 between it and the inner surface of B. As a result, when the rotation / slide mechanism 40 is activated, the deburring rod 42 rotates at a high speed in the direction of an arrow 46 in the drawing (rotates in the direction opposite to the rotation direction of the flange 22), and the through hole 34A of the fixed chuck 34 and the flange. Hole 2
2B slide to the inside of the pipe hole 20B, and the arrow 48 in the figure
Move in the direction. The deburring rod 42 is detachably attached to the body of the deburring device so that it can deal with the pipes 20 and the flanges 22 having various inner diameters.

Next, the operation of joining the pipe 20 and the flange 22 and the operation of treating burrs generated at the time of joining by the friction welding apparatus of the present invention configured as described above will be described with reference to FIGS. 4 to 7. FIG. 4 is a diagram showing changes over time in the rotational state of the flange 22, or changes over time in the pressure applied to the joint between the pipe 20 and the flange 22, and the like.
7 to 7 are cross-sectional views for explaining the function of treating burrs.

As described above, the one end surface 2 of the pipe 20.
0A and the end surface 22A on one side of the flange 22 are slightly separated from each other, first, the motor of the rotation mechanism 36 is driven to rotate the fixed chuck 34 at a high speed in the direction of the arrow 38 in the drawing and hold it on the fixed chuck 34. Flange 22
The number of revolutions is increased to a predetermined number of revolutions N ₁ . Next, while maintaining the rotation speed of the flange 22 at the predetermined rotation speed N ₁ , the hydraulic device 28 is activated to move the other end face 20C of the pipe 20 held by the pressing guide 30 to the flange 22 side at the pressure P _1. Press. As a result, the one end surface 20A of the pipe 20 and the one end surface 2 of the flange 22 that rotates at a high speed.
2A is the flange 22 in the state of being pressed with a predetermined pressure P _1.
The frictional heat is generated at the joint, and the joint is melted by the frictional heat.

Next, the joint portion is the pipe 20 and the flange 22.
When they are sufficiently melted to join and, the output of the hydraulic device 28 is increased, and the pressure for pressing the pipe 20 is increased from P ₁ to P _2, which is the upset pressure. And pipe 2
When the pressure that presses 0 reaches the upset pressure P ₂ , the rotation of the flange 22 is suddenly stopped by the brake device of the rotation mechanism 36. As a result, the pipe 20 and the flange 22 in the molten state are joined together. Also, the upset pressure P ₂
Is maintained until the pipe 20 and the flange 22 are completely joined.

However, when the upset pressure P ₂ is applied to the joint, an outer burr 50 is generated on the outer peripheral surface of the joint of the pipe 20 and the flange 22, and an inner burr 52 is generated on the inner peripheral surface. . Therefore, in the friction welding device of the present invention,
Almost at the same time when the upset pressure P ₂ is applied to the joint,
As shown in FIG. 5, the rotation / slide mechanism 40 of the deburring apparatus is activated to rotate the deburring rod 42 at a high speed at a predetermined rotation speed N ₂ in the direction of the arrow 46 in the drawing, and slide pressure P toward the joining portion. Slide to move with ₃ . When the tip portion of the burr processing rod 42 comes into contact with the inner burr 52, the inner burr 52 is crushed toward the pipe 20 side, as shown in FIG. At this time, since the groove 42A is formed in the axial direction of the deburring rod 42, the inner burr 52 is crushed by being caught by the groove 42A and bent.

Further, while the deburring rod 42 slides to the state shown in FIG. 7, the inner burr 52 melts into the joint in the molten state, and the removal of the inner burr 52 is completed. This time,
By rotating the rotation direction 46 of the deburring rod 42 in the direction opposite to the rotation direction 38 of the flange 22, it is possible to prevent the inner burr 52 from adhering to the deburring rod 42. Further, the pipe hole 20 is larger than the inner diameter of the flange hole 22B.
If the inner diameter of B is increased by a predetermined dimension t (about 5 mm depending on the diameters of the pipe 20 and the flange 22), the inner burr 52 crushed toward the pipe 20 is formed at the stepped portion 56. Since it is housed on the pipe 20 side, the inner peripheral surface of the joint can be made smooth.

Next, a second embodiment of the friction welding device of the present invention will be described. The difference from the first embodiment is that the burr-treated rod 4
2 is that the drill 58 shown in FIG. 8 is used. As a result, when the burr processing device is driven, the drill 58 slides in the direction of the joint while rotating, and the inner burr 52 generated on the inner peripheral surface of the joint is cut off. Therefore, in the case of the second embodiment, even if the inner diameter of the flange hole 22B and the inner diameter of the pipe hole 20B are the same, the inner surface of the joint can be made smooth.
Therefore, it is convenient to prepare both the deburring rod 42 described in the first embodiment and the drill 58 of the second embodiment, and to allow the deburring rod 42 to be easily attached to and detached from the body of the deburring device. is there.

As described above, the friction welding device of the present invention is
The pipe 20 and the flange 22 can be joined and the inner burr 52 generated on the inner peripheral surface of the joined portion can be treated at once.
Further, as can be seen from FIG. 4, in the treatment of the inner burr 52, the removal of the burr is substantially completed within the time until the joint between the pipe 20 and the flange 22 is completely joined (the time when the upset pressure is maintained). Can be terminated.

As a result, the friction welding apparatus according to the present invention can remarkably improve the working efficiency, and since the joining step and the burr removing step can be performed by one apparatus, the apparatus space can be reduced. Although the pipe and the flange have been described in the embodiments, the present invention is not limited to this and can be applied to any cylindrical member.

[0021]

As described above, according to the friction welding device of the present invention, the end face of the cylindrical member and the perforated flange are joined together, and the burr generated on the inner peripheral surface of the joined portion is treated at once. Therefore, unlike the conventional friction welding device, it is not necessary to perform the deburring process with another device after the joining process.

Therefore, since the work efficiency can be remarkably improved, the work time can be shortened, and the joining step and the burr removing step can be performed by one apparatus, so that the apparatus space can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view illustrating a first embodiment of a friction welding device according to the present invention.

FIG. 2 is a perspective view illustrating the structure of a deburring rod of the friction welding device according to the present invention.

FIG. 3 is a front view of the deburring rod of FIG. 2 seen from the tip end side.

FIG. 4 is an explanatory view for explaining a change over time in pressure contact pressure and the like in the operation of joining and burr treatment of the friction pressure welding apparatus according to the present invention.

FIG. 5 is a cross-sectional view showing the start point of processing the inner burr with the friction welding device of the present invention.

FIG. 6 is a cross-sectional view showing a process of processing inner burrs by the friction welding device of the present invention.

FIG. 7 is a sectional view showing a state in which inner burrs are processed by the friction welding device of the present invention.

FIG. 8 is a side view illustrating the structure of a deburring rod used in the second embodiment of the friction welding device according to the present invention.

[Explanation of symbols]

 20 ... Pipe 20A ... One end surface of pipe 20B ... Pipe hole 20C ... Other end surface of pipe 22 ... Flange 22A ... One end surface of flange 22B ... Flange hole 30 ... Press guide 34 ... Fixed chuck 34A ... Through hole of fixed chuck 42 ... Burr processing rod 50 ... Outer burr 52 ... Inner burr

Claims (3)

[Claims] 1. A welded portion is melted by frictional heat generated in the welded portion by rotating either the cylindrical member or the flange while the end surface of the cylindrical member and the perforated flange are in pressure contact with each other. In a friction welding device for joining a cylindrical member and a flange, a groove is formed in the longitudinal direction on the outer peripheral surface of a rod-shaped member that can be inserted into the holes of the cylindrical member and the flange, while rotating the rod-shaped member. A friction welding device characterized in that a burr formed on an inner peripheral surface of a joint is removed by slidingly moving in the hole of the cylindrical member and the flange. 2. The friction welding device according to claim 1, wherein the rod-shaped member is a drill. 3. The friction welding device according to claim 1, wherein the hole diameter of the flange is smaller than the inner diameter of the cylindrical member.