JPH10263887A - Welding jig for tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a welding jig for a tube capable of abutting tubes without a gap even if the end face of a tube is more or less inclined, connecting a tube to a joint for 45 deg. or 90 deg., and using an automatic welding machine. SOLUTION: The jig is provided with the body 10, a first clamp 11 and a second 12 that are capable of holding a tube to be joined; the jig body 10 is L-shaped and is so constituted that the first clamp 11 is installed on one side of the L so that the center axis line of a tube it clamps is parallel to the other side, and that a seat 19, 20, 21 is provided in three places on the other side of the L so that the second clamp 12 can be installed freely attachably/detachably in the manner that the center axis line of the tube it clamps is on a parallel with or at 45 deg. or 90 deg. against the side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a welding jig for pipes. Specifically, when welding two pipes,
The present invention relates to a pipe welding jig capable of supporting three pipe positions at 0 °, 45 °, and 90 °.

[0002]

2. Description of the Related Art When a conventional water pipe or a pipe for water supply / drainage of a food processing machine is welded and connected, a jig for positioning and supporting the two pipes for accurate connection is used. I have. FIG. 12 shows an example of a conventional pipe welding jig. In this welding jig, two C-shaped clamps 2 and 2 'are provided in parallel on a V-block 1, and two pipes 3 and 3' to be connected are brought into contact with each other by abutting their end faces. 2, 2 'clamps.

[0003]

In such a conventional pipe welding jig, if the end face of the pipe to be connected is not exactly perpendicular to the center axis of the pipe, a gap is formed and welding becomes impossible. . No connection between tube and 45 ° or 90 ° joint. Automatic welding machine cannot be used. There are problems such as.

[0004] In view of the above-mentioned conventional problems, the present invention allows the pipes to abut each other without any gap even if the end faces of the pipes are slightly inclined, and makes it possible to connect the pipes to a 45 ° or 90 ° joint. Another object of the present invention is to realize a pipe welding jig capable of using an automatic welding machine.

[0005]

In the pipe welding jig of the present invention, a jig body 10, a first clamp 11 and a second clamp 12 capable of holding pipes to be connected, respectively. The jig body 10 has an L-shape, and the first clamp 11 is provided on one side of the jig so that the central axis of the tube to be held is parallel to the other side. The central axis of the tube holding the second clamp 12 is parallel to the side and at 45 ° and 90 °.
The seats (19, 20, 21) which can be detachably fixed to each other in the state of ° are provided at three places.

In addition, a straight liner 35a or a liner 35b having a spherical seat is detachably provided on the tube supporting portions of the first clamp 11 and the second clamp 12, respectively. .
Further, the jig body 10 is provided with an automatic welding machine 47 capable of welding around the outer periphery of the pipe, and an automatic welding machine mounting adjustment mechanism 17 capable of finely adjusting the position thereof. Further, a chuck 58 having means for expanding the outer diameter is formed at the tip of the cylindrical member 57, and an adapter 56 capable of gripping the inner diameter of the pipe joint with the chuck 58 is provided.

By adopting this configuration, even if the end faces of the pipes are slightly inclined, they can be butted against each other without any gap.
In addition, a pipe welding jig that can connect a pipe to a 45 ° or 90 ° joint and that can use an automatic welding machine can be obtained.

[0008]

1 to 5 show an embodiment of the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is an assembled perspective view,
3 and 4 are views showing a liner, and FIG. 5 is a view showing an automatic welding machine mounting adjustment mechanism. In this embodiment, FIG.
As shown in FIG. 2, a jig main body 10 and a first clamp 11 and a second clamp 12 for holding pipes to be connected, respectively.

The jig body 10 is substantially L-shaped, and a first clamp 11 is fixed to one side of the jig so that the central axis of the tube held by the jig is parallel to the other side. 13 and a bolt 14 for mounting a clamp.
A plurality of holes 15 are formed for inserting the holes, and an automatic welding mounting shaft 16 and an automatic welding mounting adjusting mechanism 17 are provided through the sides.
8 is attached. In the present embodiment, the first
The clamp 11 is formed separately from the main body 10 and is connected by bolts 14.
It may be integrally formed with the zero.

On the other side, a second clamp 12 is provided.
The central axis of the tube holding it is parallel to the side, or 4
Seats 19, 20, 2 for mounting at 5 ° or 90 °
1 are provided at three places. And the seats 19, 20,
In the center 21, a screw hole 22 for attaching a second clamp is formed at the center, and positioning holes 23 and 23 'are formed on the left and right thereof. In the drawing, the two positioning holes 23, 23 'are arranged at right ends in a direction perpendicular to the length direction of the side, and at the center, clockwise with respect to the length direction of the side. It is arranged at a position rotated by 45 °, and the left end is arranged in the longitudinal direction of the side.

The first clamp 11 has a lower member 11a and an upper member 11b each having a semicircular concave portion for holding a liner 35, and one end thereof is openably and closably connected with a hinge pin 24, and the other end of the lower member 11a. , A gate member 26 having a clamp screw 25 is rotatably provided by a hinge pin 27. The gate member 26 presses the upper member 11b against the lower member 11a by tightening the clamp screw 25, and the liner 3 held in the concave portion is pressed.
The tube can be clamped via 5.

In the second clamp 12, a lower member 12a and an upper member 12b each having a semicircular recess for holding a liner 35 are connected at one end to a hinge pin 28 so as to be openable and closable. At the end, a portal member 30 having a clamp screw 29 is provided rotatably with a hinge pin 31. Then, the portal member 30 is connected to the liner 3 held in the recess in the same manner as the first clamp.
The tube can be clamped via 5.

Also, the lower member 1 of the second clamp 12
2a are seats 19, 20, 21 provided on the jig body 10.
An arm 32 for fixing to any one of the above is formed, and the arm 32 is provided with a mounting screw 33 having a lever 33a for fixing to the seats 19, 20, 21 through. The seat 1 is provided on the back surface of the arm 32.
Positioning pins (not shown) engaging with positioning holes 23, 23 'provided in 9, 20, 21 are arranged and implanted in a direction perpendicular to the central axis of the tube held. A foot 34 for height adjustment is attached to the lower surface of the lower member 12a.

A liner 35 is detachably provided in the concave portions for holding the liners of the first and second clamps 11 and 12. This liner includes a straight liner 35a shown in FIG. 3 and a spherical liner 35b shown in FIG.
A plurality of inner diameters are prepared according to the diameter of the pipe to be clamped. The straight liner 35a shown in FIG.
The part in contact with the lower member above the clamp is a cylindrical surface,
A stator 37 having an O-ring 36 is attached by screws 38, and the stator 37 fits into holes provided in upper and lower members of the first and second clamps and is detachably attached.

The spherical liner 35b shown in FIG.
A spherical seat 40 and a liner member 40a mounted thereon
And the spherical seat 40 is above the first and second clamps,
The lower member is attached to the lower member with screws 39, and the liner member 40a is attached with the stator 37 with screws 38. The gap between the hole provided in the liner member 40a and the screw 38 causes the liner member 40a to be attached to the spherical seat 40. It can be slid slightly. The attachment / detachment to / from the clamp is the same as that of the straight liner 35a.

The automatic welding machine mounting and adjusting mechanism shown in FIG. 5 has a flange 41a, a sleeve 41 having a thread formed on the outer surface, and a thread 42a formed at one end through the sleeve 41. A shaft 42, a knob 43 fitted to the flange 41 a of the sleeve 41, and a nut body 44 fixed to the knob 43 by a push screw 43 a and screwed to the screw 42 a of the shaft 42. A key groove 45 is engraved on the threaded portion of the key.
Is provided on the flange 41 a of the sleeve 41. And
By rotating the knob 43, the nut body 44
2, the screw 42 can be moved left and right. Thereby, the automatic welding machine 47 attached to the shaft 42
Can be finely adjusted left and right.

The above members are assembled as shown in FIG. That is, the first clamp 11 is assembled and fixed on the seat 13 of the jig main body 10 by the bolt 14. This operation is unnecessary when the first clamp 11 is formed integrally with the jig body 10. The second clamp 12 is provided with seats 19, 20,
21. Next, a method of using the present embodiment assembled as described above will be described.

First, as shown in FIG. 6, for connecting the straight pipes, the second clamp 12 is fixed to the right end seat 19 of the jig main body 10 with screws 33. In this case, the second clamp 12 becomes parallel to the first clamp 11 by the engagement between the positioning hole of the seat 19 and the positioning pin provided on the arm 32 of the second clamp 12. Next, one tube 50 is held by the first clamp 11, and the other tube 51 is held by the second clamp, and the end faces of both tubes are butted against each other.

An automatic welding machine 47 (the outer shape of which is shown in FIG. 7) is supported and fixed to the automatic welding machine mounting shaft 16 and the shaft 42 of the automatic welding machine mounting adjusting mechanism 17. Then, the electrode 52 of the automatic welding machine is connected to the tube 5 by the automatic welding machine mounting adjustment mechanism 17.
After the electrodes 52 are adjusted so as to be positioned at the butting surfaces 53 of 0, 51, the electrodes 52 are made to make a round around the outer circumference of the tube, and the tubes are welded to each other.

In this case, as shown in FIG.
Even if the butting surfaces 53, 53 'of 0, 51 are not exactly perpendicular to the central axis of the tube but are slightly inclined,
5, the spherical liner 35b is inclined at angles θ and θ ′ as shown in FIG.
The butting surfaces 53, 53 'of 51 can be brought into close contact. 8 (a) and 8 (b) use the spherical liner 35b for both clamps. However, as shown in FIG. 8 (c), even if there is a step on the butt surfaces 53, 53 'of the tubes 50, 51, it is important for the welding strength. When a good adhesion is obtained, the straight liner 35a may be used on one side and the spherical liner 35b may be used on the other side.

In a state where the second clamp 12 is fixed to the right end seat 19 of the jig body 10 as in FIG. 6, a branch joint 54 is inserted between the two straight pipes 50 and 51 as shown in FIG. The clamps can be held by the first and second clamps 11 and 12.

FIG. 10A shows a case where the straight pipe 50 and the 45 ° elbow joint 55 are connected. In this case the second
Is fixed to the center seat 20 of the jig main body 10, and the second clamp 12 is moved to the first position by the engagement of the positioning hole of the seat 20 with the positioning pin of the second clamp.
45 ° with respect to the clamp 11 of FIG. The first clamp 11 holds the straight pipe 50, and the second clamp 12 holds a 45 ° elbow 55 via an adapter 56 as shown in FIG. The end faces of the straight pipe 50 and the 45 ° elbow 55 can be abutted against each other.

The adapter 56 shown in FIG. 10 (b) has a collet chuck 58 at the tip of a cylindrical member 57, and opens the collet via a screw shaft 60 by rotating a knob 59 at the rear end to open an elbow joint 55. Can be grasped from the inside. The adapter 56 shown in FIG. 10C has a collet chuck 58 at the tip of a cylindrical member 57 whose diameter is expanded by a ball 62, and the ball 62 is pressed by a screw shaft 60 having a knob 59 to open the collet, and an elbow is opened. The joint 55 can be grasped from inside.

FIG. 11 shows a case where the straight pipe 50 and the 90 ° elbow joint 61 are connected. In this case, the second clamp 12 is fixed to the left end seat 21 of the jig main body 10 so that the positioning hole of the seat 21 and the positioning pin of the second clamp engage with each other, so that the second clamp 12 becomes the first clamp. The angle is 90 ° with respect to the clamp 11. The first clamp 11 holds a straight pipe 50, and the second clamp 12 holds a 90 ° elbow 55 through the adapter 56.
Hold. Thereby, the straight pipe 50 and the 90 ° elbow 55
End faces can be abutted against each other.

In the case of the elbow joint connection shown in FIGS. 10 and 11, the joint can be brought into close contact by holding the adapter 56 with a spherical liner. If the outer diameter of the cylindrical member 57 of each adapter 56 is made the same as the outer diameter of the pipe to be connected, the same liner as the pipe can be used.

[0026]

According to the welding jig for pipes of the present invention, an automatic welding machine can be used, and it is possible to cope with a plurality of kinds of pipes having different outer diameters by replacing a liner.
Moreover, even if the end face of the pipe is slightly inclined, it can be butt-tight without gaps, and furthermore, the pipe can be connected to a 45 ° or 90 ° joint, such as a water supply or water supply / drain pipe of a food processing machine. This can contribute to facilitation of connection and improvement of connection quality.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is an assembled perspective view showing the embodiment of the present invention.

3A and 3B are views showing a straight liner according to the embodiment of the present invention, wherein FIG. 3A is a side view, and FIG.
It is sectional drawing in the -b line.

4A and 4B are diagrams showing a spherical liner according to the embodiment of the present invention, wherein FIG. 4A is a side view, and FIG. 4B is a cross-sectional view taken along line bb in FIG.

FIG. 5 is a diagram showing an automatic welding machine attachment adjustment mechanism according to the embodiment of the present invention.

FIG. 6 is a diagram showing a case in which straight pipes are connected according to an embodiment of the present invention.

FIGS. 7A and 7B are diagrams showing the outer shape of the automatic welding machine, wherein FIG. 7A is a side view, and FIG.

FIG. 8 is a diagram showing a case where abutting surfaces are inclined in connection between straight pipes.

FIG. 9 is a diagram showing a case where a straight pipe and a branch joint are connected according to the embodiment of the present invention.

10A and 10B are diagrams showing a case where a straight pipe and a 45 ° elbow are connected according to the embodiment of the present invention, wherein FIG. 10A is a plan view and FIG.
(C) is a sectional view showing two examples of the adapter.

FIG. 11 is a diagram showing a case where a straight pipe and a 90 ° elbow are connected according to an embodiment of the present invention.

FIG. 12 is a view showing an example of a conventional pipe welding jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Jig main body 11 ... 1st clamp 12 ... 2nd clamp 13, 19, 20, 21 ... Seat 14 ... Bolt 16 ... Automatic welding machine mounting shaft 17 ... Automatic welding machine mounting adjustment mechanism 22 ... Screw hole 23, 23 '... positioning holes 24, 27, 28, 31 ... hinge pins 25, 29 ... clamp screws 26, 30 ... portal members 32 ... arms 33 ... mounting screws 35 ... liners 47 ... automatic welding machines 50, 51 ... pipes 53 ... butting Surface 55… 45 ° elbow joint 56… Adapter 61… 90 ° elbow joint

Claims (4)

[Claims] 1. A jig body (10), comprising a first clamp (11) and a second clamp (12) capable of holding pipes to be connected, respectively. ) Is L-shaped, and the first clamp (11) is provided on one side thereof so that the central axis of the tube to be held is parallel to the other side, and the first clamp (11) is provided on the other side. The seat (1) which can fix the clamp (12) detachably in a state where the central axis of the tube to be held is parallel to the side and at 45 ° and 90 °.
9. A welding jig for a pipe, wherein nine, 20, and 21) are provided at three places. 2. The first clamp (11) and a second clamp (11).
The pipe welding jig according to claim 1, characterized in that a straight liner (35a) or a spherical liner (35b) is detachably provided on the tube support portion of the clamp (12). 3. An automatic welding machine attachment adjusting mechanism (17) capable of attaching an automatic welding machine (47) capable of welding around the outer periphery of a pipe to the jig body (10) and finely adjusting the position thereof. ) Is provided.
Or the welding jig for pipes of 2. 4. A chuck (58) having means for increasing the outer diameter is formed at the tip of the cylindrical member (57), and an adapter (56) capable of gripping the inner diameter of the pipe joint with the chuck (58) is provided. The welding jig for a pipe according to claim 1, wherein the jig is provided.