JPH11192563A - Diffusion bonding equipment for piping materials - Google Patents

Abstract

(57) [Summary] PROBLEM TO BE SOLVED: To provide an end face of a pipe material with respect to a longitudinal center of the pipe material.
Even if the accuracy of the small squareness is poor, the piping
To provide a piping material diffusion bonding device that can perform diffusion bonding while
I do. SOLUTION: A pipe material P is supplied from above to below.
Diffusion bonding apparatus A for piping material P
Device A is lower piping material P ₁And a lower block L for holding
Upper piping material P_TwoHolding and holding on
Piping material P_TwoTo the lower piping material P₁Upper block U to press
And an upper arrangement of the elevating member 10 of the upper block U.
Tubing P_TwoAt least three hydraulic series
Which are arranged so that the solders 2 are located on the same circumference.
It is.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diffusion bonding apparatus for piping material. More specifically, the present invention relates to a pipe joining apparatus capable of diffusing and joining a pipe material fed from above to a pipe material positioned below, evenly.

[0002]

2. Description of the Related Art Conventionally, various products have been manufactured using diffusion bonding because of the good quality of the bonding portion. Also, if an oil country tubular goods are manufactured using this diffusion joining, it is expected that an oil country tubular goods with improved quality of the joints can be obtained.

[0003] Therefore, as shown in FIG. 7, one of the piping material to be diffusion bonded to (lower pipe member) P ₁ and held vertically, the other piping material that is diffusion bonded to it (the upper pipe member) P ₂ Feeding while lowering vertically from above by the lifting means E,
According to the end face of the upper pipe material P ₂ pressed into contact the end face of the lower pipe material P ₁ held vertically in downward and apparatus A'diffusion bonding by heating the point later that accordingly, It is thought that it is possible to manufacture long-sized pipes such as oil country tubular goods whose length after joining reaches several kilometers.
The apparatus having such a configuration is herein referred to as a vertical diffusion bonding apparatus A '.

[0004] However, when viewed microscopically, the ends of the pipe members P ₁ and P ₂ are strictly perpendicular to the longitudinal centers of the pipe members P ₁ and P ₂ as shown in FIG. Is rarely. Therefore, when pressing the upper piping material P ₂ at the bottom piping material P _1, piping material P _1, concentrate the pressing force on a part of the P ₂ is be pressed by uniformly desired pressing force across joint surfaces Can not. As a result, there are places where voids exist because a desired degree of adhesion cannot be obtained. In addition, since the pressing force is insufficient at such a portion, the strength of the bonded portion after the bonding is reduced.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and the accuracy of the perpendicularity of the end face of the pipe material to be joined is somewhat poor with respect to the longitudinal center of the pipe material. It is another object of the present invention to provide a diffusion bonding apparatus for piping materials capable of performing diffusion bonding while uniformly pressing the piping materials.

[0006]

According to the present invention, there is provided a diffusion bonding apparatus for pipe material, wherein the pipe material is supplied from above to below. A lower block that holds the upper piping material, and an upper block that holds the upper piping material and presses the holding upper piping material against the lower piping material, and that holds the upper piping material of the elevating member of the upper block. It is characterized in that three or more hydraulic cylinders are arranged around the same circumference.

In the pipe member diffusion bonding apparatus of the present invention, the number of the hydraulic cylinders is three, and the angle with respect to the center point of each hydraulic cylinder is in the range of 110 to 130 degrees. preferable.

[0008] In a preferred embodiment of the pipe joint diffusion apparatus of the present invention, the upper block is provided with a horizontal position adjusting means for adjusting the position of the held upper pipe member on a horizontal plane.

[0009] In a further preferred embodiment of the piping material diffusion bonding apparatus of the present invention, the upper block is provided with an inclination adjusting means for adjusting the inclination of the upper piping material.

[0010] In a further preferred embodiment of the pipe member diffusion bonding apparatus of the present invention, the elevating member comprises an outer member,
And an inner member holding an upper piping member held inside the outer member so as to be horizontally movable and tilt-adjustable.

Here, the horizontal position adjusting means includes, for example, a horizontal moving member holding the inner member inside, which is held horizontally movable by the outer member, and a horizontal moving member, which can move forward and backward by the outer member. A first drive screw member mounted thereon; and a second drive screw member mounted on the outer member so as to be able to advance and retreat at an interval of 90 degrees from the first drive screw member. And / or adjusting the driving amount of the horizontal moving member by the second driving screw member to adjust the horizontal position of the inner member, thereby adjusting the horizontal position of the upper piping member.

[0012] The inclination adjusting means may include, for example, a cylindrical member supporting a flange member provided on the outer periphery of the inner member rotatably held by the horizontal moving member; A disc cam member supporting a flange member provided on the outer periphery of the inner member provided concentrically at 120 degree intervals, and a drive mechanism for driving the disc cam member. By adjusting the height of the disk cam member supporting the flange member by the drive mechanism, the inclination of the upper pipe member held by the inner member is adjusted.

Further, the inner member includes, for example, an upper clamp means disposed on an upper part thereof, and a lower clamp means disposed on a lower part thereof. The lower clamp means prevents the joint end of the upper piping material from being deformed.

Here, the distance between the upper clamp means and the lower clamp means is equal to 3 mm of the diameter of the upper pipe material being clamped.
Preferably, the upper and lower clamps have a first claw block, a second claw block, and a third claw block arranged at intervals of 120 degrees. preferable.

[0015]

Since the pipe joining apparatus of the present invention is constructed as described above, it is possible to carry out diffusion joining in a state where the upper pipe is uniformly pressed against the lower pipe. for that reason,
The quality and strength of the joint are improved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments with reference to the accompanying drawings, but the present invention is not limited to only such embodiments.

FIG. 1 is a conceptual diagram showing an embodiment of a pressing device F applied to the vertical joining device of the present invention. In this embodiment, the pressing device F is applied to a vertical diffusion bonding device for diffusion bonding the pipe material P.

The pressing device F is connected to a pipe member (lower pipe member) P ₁ which is held by a lower mechanism (not shown) of the vertical diffusion bonding apparatus and positioned below and which is to be diffusion-bonded (lower pipe member) P _1. material upper surface of the (upper pipe member) for supplying P ₂ from vertically above the upper mechanism (not shown) the upper pipe material P ₂ clamping means for clamping the lifting member has a built-in (distinctly not shown) 1 1a in that the upper pipe material P ₂ 3 pairs of hydraulic cylinders 2 from the center that is clamped arranged provided equidistant and 120 ° interval, i.e. the first hydraulic cylinder 2A, the second hydraulic cylinder 2B and third It is constituted by a hydraulic cylinder 2C. That is, the upper piping material P ₂ of the upper surface 1a of the lifting member 1 in the same circumference on around the center being clamped, is constituted by three pairs of hydraulic cylinders 2 are disposed to provide a 120 degree intervals You. And
These hydraulic cylinders 2, while functioning as a pressing device F for pressing the upper piping material P ₂ at the bottom piping material P _1, also functions as a lifting device E for elevating the elevating member 1. In FIG. 1, reference numeral C indicates a driving cylinder of the clamping means.

Next, the pressing device F having such a configuration will be described.
The pressing action to the lower piping material P ₁ of the upper pipe material P ₂ by describing.

[0020] (1) a first hydraulic cylinder 2A, a second hydraulic cylinder 2B and the third hydraulic cylinder 2C is driven to lower the lift member 1, the lower end of the upper pipe material P ₂ to the upper end of the lower pipe material P ₁ Abut.

[0021] (2) first hydraulic cylinder 2A, the hydraulic pressure is raised to the second hydraulic cylinder 2B and the third hydraulic cylinder 2C and to press the upper pipe member P ₂ at the bottom piping material P _1. In this case, if the hydraulic pressures of the first hydraulic cylinder 2A, the second hydraulic cylinder 2B, and the third hydraulic cylinder 2C are the same, the first hydraulic cylinder 2A, the second hydraulic cylinder 2B, and the third hydraulic cylinder 2C are arranged as described above. since there is a, the end face of the upper pipe material P ₂ is evenly press the end surface of the lower pipe material P _1.

As described above, the pressing device F of this embodiment
According to, the three sets of hydraulic cylinder 2 top piping material P ₂ of the lifting member 1 the upper pipe member is clamped from the center that is clamped by providing a equidistant and 120 degree intervals are provided , the lower pipe material P ₁ the end face of the upper pipe material P ₂ by a simple operation of the hydraulic pressure of the hydraulic cylinder 2 only in the pressure
Can be evenly pressed against the end surface of the.

FIG. 2 is a schematic view of a diffusion bonding apparatus having the pressing device F. This diffusion bonding apparatus is a so-called vertical type in which a pipe P to be diffusion-bonded is supplied vertically from above to perform diffusion bonding. Diffusion bonding apparatus A, in which piping material P
An upper block U vertically movable supplying, includes as main components and a lower block L which holds the lower piping material P ₁ is diffusion bonded to the upper piping material P ₂ supplied by the upper block U It will be.

The upper block U includes an upper block main body (elevating member) 10, an elevating / lowering mechanism 20 for raising and lowering and pressing the upper block main body 10, and a first unit disposed above the upper block main body 10. The main components are a clamp mechanism (upper clamp mechanism) 30 and a second clamp mechanism (lower clamp mechanism) 40 provided below the upper block body 10.

The lifting / pressing mechanism 20 is, specifically, a guide post 21 composed of four cylinders arranged in a rectangular shape on a base B, and a rectangular shape extending over the top of the guide post 21. And four sets of hydraulic cylinders 23 concentrically arranged at 120-degree intervals, that is, a first hydraulic cylinder 23A, a second hydraulic cylinder 23B, and a third hydraulic cylinder 23C. Pressing device F and each hydraulic cylinder 23A, 23B, 23C of this pressing device F
And a holding beam (not clearly shown) joined in an appropriate configuration to a main beam 22 holding the holding member 24 downward through a holding member 24. By arranging the three sets of hydraulic cylinders 23 at equal intervals in this manner, three-point pressing is performed, and a uniform pressing force can be obtained on the circumference of the joint end surface of the pipe material P as described above.

The upper block main body (elevating member) 10 has an outer member 11 and an inner member 12 having a main portion disposed inside the outer member 11 as a main member. And a tilt adjusting mechanism 14 for adjusting the tilt of the inner member 12.

The outer member 11 has the inner member 12 inside.
Is formed in a rectangular parallelepiped body which is notched with a predetermined width on one side and a space for storing the space. Guide post insertion portions 11a for slidably mounting the outer member 11 on the guide posts 21 are formed at four corners of the rectangular body. The upper end 11b and the lower end 11c of the guide post insertion portion 11a are projected at predetermined heights from the upper surface and the lower surface of the rectangular parallelepiped constituting the outer member 11, and the outer peripheral portion is also a rectangular parallelepiped. It protrudes in an arc shape from the corner (see FIG. 3). Further, the inner surface of the rectangular parallelepiped constituting the outer member 11 is cut out at a predetermined depth and a predetermined width, and the inner surface thereof has a groove-shaped space 1.
1d is formed.

A horizontal moving member 13a of the horizontal position adjusting mechanism 13 is provided in the grooved space 11d, and the upper and lower surfaces of the horizontal moving member 13a and the grooved space 11d of the outer member 11 are formed. In the gap between the ceiling and the bottom surface, a large number of bearing balls 13b are filled over the entire circumference so that the horizontal moving member 13a can move horizontally. In order to prevent the bearing balls 13b from dropping out of this gap, the horizontal moving member 1 is used.
The portions of the upper and lower surfaces 3a where the bearing balls 13b are filled are recesses of appropriate depth. In this case, as shown in FIG. 2, the groove-shaped space 11d of the outer member 11 is formed.
The portions of the ceiling and bottom surface where the bearing balls 13b are filled may be recesses having a width that ensures horizontal movement of the horizontal moving member 13a. The upper portion of the outer member 11 where the concave portion is formed is formed as a lid 11e and is separable. In addition, since the outer member 11 is configured as described above, filling of the bearing balls 13b and attachment of the horizontal moving member 13a are facilitated.

The horizontal movement of the horizontal moving member 13a is, as shown in FIGS.
This is provided by drive screw members 13c and 13d which are provided at appropriate positions on the short side surface and the long side surface, respectively, and whose distal ends are mechanically connected to the horizontal moving member 13a (see FIG. 6). For example, the driving screw member (X-axis direction driving screw member) 13 provided on the short side surface in FIG.
When the handle 13e is rotated in a predetermined direction to bring the tip of the driving screw member 13c into contact with the horizontal moving member 13a to further advance the driving screw member 13c, the horizontal moving member 13a is horizontally moved leftward in the drawing. Moving. Conversely, when the handle 13e is rotated in the reverse direction to retreat the driving screw member 13c abutting on the horizontal moving member 13a, the distal end of the driving screw member 13c connected to the horizontal moving member 13a also retreats. Therefore, the horizontal moving member 13a moves rightward in the figure. Further, the handle 13f of the driving screw member (Y-direction driving screw member) 13d provided on the long side surface shown in FIG.
When the leading end of 3d is brought into contact with the horizontal moving member 13a and the driving screw member 13d is further advanced, the horizontal moving member 13a moves horizontally downward in the drawing as described above. Conversely, the handle 13f is rotated in the reverse direction to rotate the horizontal moving member 13a.
When the driving screw member 13d that is in contact with
As described above, the horizontal moving member 13a moves upward in the figure.

As shown in FIG. 3, in this embodiment, a driving screw member (Y-direction driving screw member) provided on the long side surface in consideration of the operability of the handle 13f.
A handle 13f of 13d is provided near a handle 13e of a drive screw member (X-direction drive screw member) 13c provided on the short side surface, and the drive screw member 1 is provided.
3d is rotated by the driving force transmission mechanism 13g.

A groove-like space 13h is provided in the lower inner surface of the horizontal moving member 13a. Above the groove-shaped space 13h, three flange members 12a formed on the side surface of the inner member 12 are provided with a predetermined gap from the ceiling of the groove-shaped space 13h. The three flange members 12a are each formed of a first flange member 12a ₁ formed so as to coincide with the Y-axis direction, and the first flange member 12a ₁
A second flange member 12a ₂ which are formed by providing a time interval is the third flange member 12a _3. Below the first flange member 12a ₁ , the second flange member 12a ₂ and the third flange member 12a _3, a first tilt adjusting member 14 of the tilt adjusting mechanism 14 is provided.
a ₁ , a second inclination adjusting member 14a ₂ and a third inclination adjusting member 14a ₃ are arranged in contact with the lower surfaces of the flange members 12a ₁ , 12a ₂ and 12a ₃ . Among the first to third tilt adjusting _{14a 1, 14a 2, 14a 3} , second tilt adjusting 14a ₂ and the third tilt adjusting 14a ₃ is a disk cam. Then, the disc cam is connected to the driving force transmission mechanism 14.
The tilt angle of the inner member 12 is adjusted by rotating the inner member 12 by a predetermined amount in a predetermined direction via b (see FIG. 6). In addition, the handle 14c of these driving force transmission mechanisms 14b
Are provided on the same long side surface in consideration of their operability (see FIG. 3).

The hollow inner member 12, which places corresponding to the cutout is notched in a fan, and a circular hole 12b for inserting the upper piping material P ₂ on the upper and lower surfaces are provided in the outer member 11 is a cylindrical body, also the first flange member 12a ₁ as described above at a position corresponding to the groove-shaped space 13h of the horizontal moving member 13a of the side surface, the second flange member 12, _second and third flange members 12a ₃ Are formed. Further, on the upper surface of the inner member 12, three joining members 12c for joining with the tip of the piston rod 24 of the hydraulic cylinder 23 of the lifting / lowering mechanism 20 are provided concentrically at predetermined intervals. These three joint member 12c is first the first joint member 12c ₁ is provided to match the Y-axis direction, it is provided at an angle of the first joint member 12c ₁ and respectively 120 degrees It is 2 bonding member 12c ₂ and the third joint member 12c _3.

Further, a first clamp mechanism (upper clamp mechanism) 30 and a second clamp mechanism (lower clamp mechanism) 40 are provided above and below the inner member 12, respectively. The first clamp mechanism 30 grips the upper piping material P ₂ so as to obtain a predetermined gripping force in diffusion bonding, and more specifically, is integrated with the inner member 12 so as to coincide with the Y-axis direction. first clamp pawl 3 can freely advance and retreat with respect to the upper piping material P ₂ which is movable
1, a second clamp jaws 32 can freely advance and retreat with respect to the upper piping material P ₂ which is provided to be moved integrally with the inner member 12 similar to an angle of 120 degrees with the first clamp pawl 31 and and a third clamp pawl 33 can freely advance and retreat with respect to the upper piping material P _2. This first clamp claw 3
The first and second clamp claws 32 and the third clamp claws 33 move forward and backward, for example, by being driven by a hydraulic cylinder 34 (see FIG. 2). Note that the first clamp pawl 31, the second clamp pawl 32, and the third clamp pawl 3
3 is driven by a hydraulic cylinder, each hydraulic cylinder 34
When the protruding part protrudes from the outer periphery of the inner member 12, a space 13i for storing the hydraulic cylinder is provided at a position corresponding to these hydraulic cylinders 34 of the horizontal moving member 13a (see FIG. 2).

The second clamp mechanism 40 is for preventing the joint end of the upper piping material P _{2 from being} deformed. Like the first clamp mechanism 30, the second clamp mechanism 40 is aligned with the Y-axis direction and integrated with the inner member. A movable first and second retractable clamp claw, and a first and second retractable first and second clamp claw which are each formed at an angle of 120 degrees and are also movable integrally with the inner member 12. It comprises a second clamp claw 42 and a third clamp claw 43 which can move forward and backward. In this case, the first clamp claw, the second clamp claw 42 and the third clamp claw 4
The first clamp claw, the second clamp claw 42, and the third clamp claw 4 are arranged so that each hydraulic cylinder 44 for driving the third clamp claw 4 is located below the bottom surface of the rectangular parallelepiped constituting the outer member 11.
The mounting position of 3 on the inner member 12 is adjusted. Here, these first clamping mechanism 30 the distance between the second clamping mechanism 40, more than three times the upper pipe material P ₂ diameter is preferably more than five times. By providing such a gap, it is possible to influence on the end surface deformation of the gripping force of the upper pipe material P ₂ of the first clamping mechanism 30 and almost no.

By the way, as described above, this inner member 1
2 has a fan-shaped notch, so that the first
Pump mechanism 30 and second clamp mechanism 40
P_Two Notch opening is large due to reaction force when clamping
The deformation prevention mechanism 50A for preventing squeezing
It is provided at two places above and below the surface. This deformation prevention mechanism 5
0A is specifically the hydraulic cylinder 51 and its hydraulic pressure
The base 52 of the cylinder 51 can be pivoted to one end of the notch
While the tip of the piston rod 53 is
The first clamp mechanism 30 and the
And the inner member at the time of clamping by the second clamp mechanism 40
12 is prevented.

The lower block L includes a lower block body 60.
A third clamping mechanism 70 disposed above the lower block body 60, an induction heating device 80 disposed above the lower block body 60, and an end face disposed on the side of the lower block body 60 The finishing device 90 is a main component. The end face finishing apparatus 90 can be applied to a pipe material P that has not been subjected to the end face processing. It is for repairing scratches such as.

The lower block body 60, through holes 62 for inserting the pipe material P on the upper surface central portion is a hat-shaped member 61 provided, the flange portion 63 is clamped to the lower piping material P ₁ It is placed and fixed on the lower clamp device G. Further, the upper block with the same notch formed in a location corresponding to the cutout portion of the inner member 12 of the body 60, the third clamp mechanism 70 clamps the lower piping material P ₁ of the hat-shaped member 61 A deformation prevention mechanism 50B configured similarly to the deformation prevention mechanism 50A for preventing deformation of the lower block main body 60 in the event of the above is also provided at the upper part.

The third clamping mechanism 70, like the first clamping mechanism 30 and the second clamping mechanism 40, the first clamp pawl 71 can freely advance and retreat with respect to the lower pipe material P ₁ to match the Y-axis direction, This first clamp claw 71 and one each
Consisting lower pipe material P ₁ second clamp jaws 72 and the third clamp pawl 73 can freely advance and retract with respect to an angle of 20 degrees.

The induction heating device 80 has two main divided induction heating coils 81 and 82, and the divided induction heating coils 81 and 82 are arranged to face each other to form the lower block body 60. It is held by a holding member 64 provided on the upper surface. Further, the induction heating coils 81 and 82 can freely move forward and backward with respect to the pipe material P. The induction heating coils 81, 8 which are divided into two parts
For the specific configuration of the induction heating device 80 having the structure 2 described above, the applicant's earlier application (Japanese Patent Application No. 9-74582).
Are disclosed.

As shown in FIGS. 4 and 5, the end face finishing device 90 is provided with a lower clamping device C for the pipe material P.
A rail 91 having a predetermined length mounted and fixed thereon, a radial traveling platform 92 traveling on the rail 91, and provided on the radial traveling platform 92 and orthogonal to the traveling direction of the radial traveling platform 92. Table 93, which travels in a row, an elevating member 94 provided at the front of the traversing table 93 so as to be able to move up and down, and an end face finishing mechanism 95 provided to protrude forward from the elevating member 94. It shall be provided.

As shown in FIG. 5, the end face finishing mechanism 95 includes a rotary finishing tool 96 provided with a cutting edge 97 at an upper end and a lower end, and a motor 98 for rotating the rotary finishing tool 96. And a rotational force transmitting means (not shown) including a timing belt for transmitting the rotational force of the motor 98 to the rotary finishing tool 96.
Are the main components.

Next, the diffusion bonding by the vertical diffusion bonding apparatus A having such a configuration will be described. The following operations are performed by commands from a control device (not shown).

(1) End face processing has been performed in advance
Lower piping material P₁ Position the upper end of the
Third clamp mechanism 70 of lock L and lower clamp device
And clamped by G.

(2) The upper pipe material P, which has also been subjected to an end face processing in advance by a material supply device (not shown).
₂ is supplied to the upper block body 10.

(3) The position of the supplied upper piping material P ₂ is adjusted so that the lower end thereof projects a predetermined length from the bottom of the upper block body 10.

(4) Upper piping material P ₂ whose position has been adjusted
Is clamped by the first clamp mechanism 30 and the second clamp mechanism 40.

[0047] (5) and a lifting-pressing mechanism 20 is operated a predetermined time, and the upper block body 10 by a predetermined amount drop upper pipe material P ₂ lower and lower piping material P ₁ a predetermined amount of spacing of the upper end.

[0048] (6) checks whether an end surface of the upper pipe material P ₂ and visually or instrument to the end face of the lower pipe material P ₁ no flaws such as dents. When a flaw such as a dent is found on the end face by this inspection, the flaw such as a dent is deleted by the following procedure. On the other hand, if no flaw such as a dent is found by this inspection, the procedure from (11) is executed.

(7) The radial traveling table 92 of the end face finishing device 90 is driven to position the rotary finishing tool between the upper piping material P ₂ and the lower piping material P ₁ .

(8) The elevating member 94 is raised and lowered to set the rotary finishing tool 96 at a predetermined position in the vicinity of the end face of the pipe material P where there is a flaw such as a dent.

(9) Radial traveling platform 92 and traversing platform 9
3 is operated appropriately to repair the end face of the pipe material P having a flaw by the rotary finishing tool 96.

(10) When the repair processing of the end face of the damaged piping material P is completed, the elevating member 94 is raised and lowered by a predetermined amount, and the radial traveling table 92 is driven to move the rotary finishing tool 96 to the upper piping material P _2. and it is retracted from between the lower pipe material P _1.

[0053] (11) measured by the upper pipe material P ₂ and the lower pipe member position shift visual or instrument of P _1, thereby eliminating the deviation by operating the horizontal position adjusting mechanism 13 as appropriate if any positional displacement.

[0054] (12) the upper piping material P ₂ lower and lower piping material P ₁ the upper end of parallelism measured visually or instrument,
If not parallel, the inclination adjusting mechanism 14 is appropriately operated to obtain a predetermined parallelism. The predetermined degree of parallelism is such that, for example, a desired degree of adhesion can be obtained by the pressing force of the first hydraulic cylinder 23A, the second hydraulic cylinder 23B, and the third hydraulic cylinder 23C described later.

[0055] (13) mounting the filler plates (not shown) in the end face at the bottom piping material P _1.

[0056] (14) lifting-pressing mechanism 20 is driven by lowering the upper block body 10 is brought into contact with the lower end of the upper pipe material P ₂ to the upper end of the lower pipe material P ₁ in.

(15) The pressing force of the first hydraulic cylinder 23A, the second hydraulic cylinder 23B, and the third hydraulic cylinder 23C is increased to a predetermined pressing force. In this case, even if points that have some clearance contact portion between the upper end of the lower end and the lower pipe material P ₁ of the upper pipe material P _2, the first hydraulic cylinder 23
A, second hydraulic cylinder 23B and third hydraulic cylinder 2
The balance of 3C pressing force, the gap becomes automatically reduced, the upper piping material P ₂ end face and the lower pipe material P ₁ end face uniformly contact.

(16) The induction heating coils 81 and 82 of the induction heating device 80 are advanced toward the contact portions of the pipe members P ₁ and P ₂ to be integrated.

(17) Electric power is supplied to the induction heating coils 81 and 82 from a power source (not shown) to heat the contact portions by induction for a predetermined time. Thereby, the contact portion is diffusion-bonded.

(18) When the diffusion bonding of the contact portion is completed,
The clamp of the pipe material P by the first clamp mechanism 30, the second clamp mechanism 40, the third clamp mechanism 70, and the lower clamp device G is released, and the joined pipe material P is fed downward by a feeder (not shown).

(19) When the upper end of the joined upper piping material P ₂ reaches a predetermined position above the lower block L, the feeding is stopped, and the piping material P is clamped by the third clamping mechanism 70 and the lower clamping device G.

Thereafter, the above procedure is repeated to obtain a pipe of a predetermined length.

[0063] Thus, according to the vertical diffusion bonding apparatus A having a pressing device F of the present invention, diffusion bonding is performed in a state wherein the upper pipe material P ₂ and the lower pipe material P ₁ is uniformly contact Therefore, uniform diffusion bonding is performed. It also allows
The joint can have the desired strength.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the embodiments, and various modifications are possible. For example, in the pressing device according to the present embodiment, the three sets of hydraulic cylinders are arranged at equal intervals of 120 degrees, but may not be strictly at equal intervals of 120 degrees, and may have some width. Good. For example, they may be arranged at an appropriate angle in the range of 110 degrees to 130 degrees. For example, the interval between the first hydraulic cylinder and the second hydraulic cylinder is 110 degrees, and the distance between the second hydraulic cylinder and the third hydraulic cylinder is
The distance between the hydraulic cylinder and the third hydraulic cylinder may be set to 130 degrees, and the distance between the third hydraulic cylinder and the first hydraulic cylinder may be set to 120 degrees. Further, the number of hydraulic cylinders is not limited to three, and may be four or five. In addition,
As the number of hydraulic cylinders increases, the end surface of the upper piping material can be pressed more evenly by the end surface of the lower piping material.However, since the configuration becomes complicated when the number of hydraulic cylinders increases, the number of hydraulic cylinders increases. It is not preferable to make too many. Furthermore, in the present embodiment, the vertical diffusion bonding apparatus is used as the bonding apparatus, but the application of the present invention is not limited to the vertical diffusion bonding apparatus, and may be a horizontal diffusion bonding apparatus. Further, the present invention is not limited to the diffusion bonding apparatus, but may be various bonding apparatuses.

[0065]

As described in detail above, according to the present invention,
Diffusion bonding can be performed in a state where the joint of the upper piping material is uniformly pressed against the joint of the lower piping material, so that an excellent effect of improving the quality and joining strength of the joint can be obtained.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a pressing device applied to a pressing method of the present invention.

FIG. 2 is a schematic front view of a diffusion bonding apparatus according to an embodiment of the present invention.

FIG. 3 is a sectional view taken along line II-II of FIG. 2;

FIG. 4 is a sectional view taken along line III-III of FIG. 2;

FIG. 5 is a side view of the end face finishing apparatus.

FIG. 6 is an operation explanatory view of a horizontal position adjustment mechanism and an inclination adjustment mechanism.

FIG. 7 is a schematic view of an upper mechanism of a conventional vertical diffusion bonding apparatus.

FIG. 8 is an explanatory diagram showing a state in which a portion that does not contact occurs when the pipe is in contact.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevating member 2 Hydraulic cylinder 2A, 23A 1st hydraulic cylinder 2B, 23B 2nd hydraulic cylinder 2C, 23C 3rd hydraulic cylinder 10 Upper block main body (elevating member) 20 Elevating / pressing mechanism 30 1st clamp mechanism 40 2nd clamp mechanism A Vertical diffusion bonding device F Pressing device U Upper block L Lower block P Piping material E Lifting device (lifting means)

Claims (10)

[Claims] 1. A diffusion bonding apparatus for a pipe material to which a pipe material is supplied from an upper side to a lower side, wherein the diffusion bonding apparatus holds a lower block for holding a lower pipe member, and holds and holds an upper pipe member. An upper block that presses the upper piping material held against the lower piping material, and three or more hydraulic cylinders are arranged on the same circumference around a place where the upper piping material of the elevating member of the upper block is held. A diffusion bonding apparatus for piping material, wherein the apparatus is disposed so as to be positioned. 2. The piping material according to claim 1, wherein the number of the hydraulic cylinders is three, and the angle of each hydraulic cylinder with respect to the center point is in a range of 110 ° to 130 °. Diffusion bonding equipment. 3. The apparatus according to claim 1, wherein said upper block comprises a horizontal position adjusting means for adjusting a position of a held upper piping material on a horizontal plane. 4. The apparatus according to claim 1, wherein the upper block includes an inclination adjusting means for adjusting an inclination of the upper piping material. 5. The elevating member includes an outer member, and an inner member holding an upper pipe member held inside the outer member so as to be horizontally movable and tilt-adjustable. The pipe member diffusion bonding apparatus according to claim 1, wherein 6. The apparatus according to claim 6, wherein said horizontal position adjusting means is mounted on said outer member so as to be capable of moving forward and backward, said horizontal moving member holding said inner member held horizontally by said outer member. A first drive screw member, and a second drive screw member attached to the outer member so as to be able to advance and retreat at 90 ° intervals with the first drive screw member, wherein the first drive screw member and / or 4. The piping member according to claim 3, wherein the horizontal position of the inner member is adjusted by adjusting a driving amount of the horizontal moving member by the two drive screw members, thereby adjusting a horizontal position of the upper piping member. Diffusion bonding equipment. 7. The cylindrical member supporting the flange member provided on the outer periphery of the inner member rotatably held by the horizontal moving member, wherein the inclination adjusting means is connected to the cylindrical member by 120 degrees. A disc cam member supporting a flange member provided on an outer periphery of the inner member which is provided concentrically at an interval; and a driving mechanism for driving the disc cam member, 5. The piping according to claim 4, wherein the inclination of the upper piping material held by the inner member is adjusted by adjusting the height of the disk cam member supporting the flange member by a driving mechanism. Material joining equipment. 8. An inner member comprising upper clamp means disposed on an upper part thereof, and lower clamp means disposed on a lower part thereof, wherein the upper clamp means grips an upper pipe member with a desired gripping force. 7. The apparatus according to claim 5, wherein the lower clamp prevents deformation of a joint end of the upper piping material. 9. The apparatus according to claim 8, wherein the distance between the upper clamping means and the lower clamping means is at least three times the diameter of the clamped upper piping material. 10. The apparatus according to claim 8, wherein the upper clamp means and the lower clamp means have a first claw block, a second claw block and a third claw block arranged at intervals of 120 degrees. A diffusion bonding apparatus for piping material as described in the above.