KR102647863B1 - Method for producing pipe elbow welding jig - Google Patents

Abstract

The present invention relates to a method of manufacturing a jig for welding a pipe elbow, comprising: (A) preparing a body 20 and a sleeve member corresponding to the outer diameter of the elbow; (B) dividing the sleeve member into four into a first cutting line (C1) inclined in the radial direction and a second cutting line (C2) inclined in the axial direction; and (C) forming a lower stand 31 and an upper stand 32 using four divided sleeve members and coupling them to the main body 20.
Accordingly, it is easy to manufacture using a standard sleeve, thereby reducing costs, and improving the stability of welding work by keeping the contact surface of the elbow as wide as possible when mounted on a rotator.

Description

Method for producing pipe elbow welding jig {Method for producing pipe elbow welding jig}

The present invention relates to a method of manufacturing a jig for welding a pipe elbow, and more specifically, to a method of manufacturing a jig for welding a pipe elbow to be held by a welding rotator in the process of manufacturing a pipe.

When welding is performed in a pipe manufacturing factory, to improve efficiency, welding is performed by attaching the piping material to a rotator and rotating the material. In the case of materials that do not have enough space to fit on the rotator, mount the material on a pipe welding jig, attach the jig to the rotator, and then perform welding. However, in the case of elbows, a special type of jig is used, and the contact surface is small, so it often happens that the elbow comes off from the jig during welding.

In order to prevent separation, it is advantageous to maintain as much of the contact surface of the elbow as possible, so a jig that wraps around the elbow would be best, but such a jig is not in the standard specifications and is difficult to manufacture separately.

In relation to this, prior art documents such as Korean Patent Publication No. 2005-0055667 (Priority Document 1) and Korean Patent Registration No. 0991201 (Priority Document 2) may be referred to.

Prior document 1 includes a main body equipped with a pair of horizontal rollers supporting a welded object; A vertical roller rotatably mounted on an elevating body that is elevated and lowered in the main body by a first driving means; a second driving means for rotating the horizontal roller to rotate and weld the object to be welded; It is provided with a third driving means for welding while tilting the object to be welded. Accordingly, the effect of increasing productivity by continuously performing automatic welding is expected.

Prior document 2 includes a rotating plate on which a partially welded elbow pipe is installed; An elbow pipe end coupling portion coupled to both ends of the rotating plate and the elbow pipe to secure the elbow pipe to the rotating plate; A pipe load distribution unit installed to move radially back and forth on a rotating plate to adjust the position according to the size of the elbow pipe; Includes etc. Accordingly, it is expected that the elbow pipe can be installed on the rotating plate with a simple operation.

However, according to the above-mentioned prior literature, it is insufficient to utilize the elbow for welding while rotating it while stably supporting it on a typical rotator.

Korean Patent Publication No. 2005-0055667 “Pipe Rotator Machine” (Publication date: 2005.06.13.) Korean Patent Publication No. 0991201 “Elbow pipe clamping device for automatic elbow welding device” (Publication date: 2010.11.01.)

The purpose of the present invention to improve the conventional problems described above is to provide a pipe elbow welding system that is easy to manufacture using currently available standard piping materials and can maintain the contact surface of the elbow as wide as possible when mounted on a rotator. The goal is to provide a jig manufacturing method.

In order to achieve the above object, the present invention provides a method for manufacturing a jig for welding an elbow of a pipe, comprising: (A) preparing a body and a sleeve member corresponding to the outer diameter of the elbow; (B) dividing the sleeve member into four into a first cutting line inclined in the radial direction and a second cutting line inclined in the axial direction; and (C) forming a lower band and an upper band with four divided sleeve members and coupling them to the main body.

As a detailed configuration of the present invention, in step (B), the first cutting line is set to pass through the center of the sleeve member and the center of the elbow, and the second cutting line is set to be perpendicular to the first cutting line while passing through the center of the sleeve member. It is characterized by setting.

As a detailed configuration of the present invention, step (B) forms a long-side member A1, a short-side member A2, a long-side member B1, and a short-side member B2, and forms a lower base with member A1 and member B1, while simultaneously forming member A2. and forming an upper band with member B2.

As a detailed configuration of the present invention, step (B) is characterized in that the support unit connecting the main body and the lower unit is combined, and the support unit is configured to make the lower unit removable.

As a detailed configuration of the present invention, step (C) is characterized in that a flange mounting base is further coupled to the end of the main body opposite to where the lower base is coupled.

As described above, according to the present invention, it is easy to manufacture using a standard-sized sleeve, thereby reducing costs, and improving the stability of welding work by maintaining the contact surface of the elbow as wide as possible when mounted on a rotator.

1 is a schematic diagram showing the jig according to the present invention in a mounted state.
Figure 2 is an overall configuration diagram of the jig according to the present invention.
Figures 3 and 4 are schematic diagrams showing the manufacturing principle of the jig mechanism according to the present invention
Figure 5 is a configuration diagram showing an example of use of the jig mechanism according to the present invention

Hereinafter, embodiments of the present invention will be described in detail based on the attached drawings.

The present invention proposes a method of manufacturing a jig for welding elbows of pipes. Elbow, a piping material used in ship construction, is connected to other piping materials such as straight pipe and tee. The rotator 10 rotates at low speed while loading the piping material to be welded into the gripper 15 to induce quick and safe work.

Of course, the present invention targets welding of piping materials using the rotator 10, but is not necessarily limited thereto. The jig mechanism of the present invention has a structure that is particularly advantageous for elbows.

Meanwhile, the elbow, which is the piping material to be welded, is clamped to the gripping portion 15 of the rotator 10 in a tack-welded state with the adjacent piping material.

Step (A) according to the present invention proceeds with the process of preparing the main body 20 and the sleeve member corresponding to the outer diameter of the elbow. The main body 20 is a tube body mounted in engagement with the rotator 10 and has a structure that can rotate around the axis of the tube body. It is recommended that the main body 20 be constructed using a standard structural or piping pipe body. The sleeve member uses a standard structural or piping pipe body formed with an inner diameter surrounding the outer diameter of the main body 20. When the main body 20 is engaged with the grip part 15 of the rotator 10, it rotates around the axis, causing concentric rotation with respect to the elbow of the welding object.

Step (B) according to the present invention goes through the process of dividing the sleeve member into four into a first cutting line (C1) inclined in the radial direction and a second cutting line (C2) inclined in the axial direction. The sleeve member is divided into four by a first cutting line (C1) inclined in the radial direction and a second cutting line (C2) inclined in the axial direction. The first cutting line C1 is set to be inclined at a certain angle in the radial direction of the sleeve member, and the second cutting line C2 is set to be inclined at a certain angle in the axial direction of the sleeve member.

As described later in FIG. 3, the straight pipe is divided into four by the first cutting line (C1) and the second cutting line (C2) to form a lower band (31) and an upper band (32) of the variable mounting means (30). . In order to realize the curved surface of the upper stand (31) and the upper stand (32) in an economical manner, a member cut from a sleeve of standard straight pipe is used.

As a detailed configuration of the present invention, in step (B), the first cutting line (C1) is set to pass through the center of the sleeve member and the center of the elbow, and the second cutting line (C2) is set to pass through the center of the sleeve member. 1 It is characterized by being set perpendicular to the cutting line (C1). Referring to Figure 4, the method of defining the angles of the cutting surfaces (C1) (C2) so that the jig of the present invention can properly grip the elbow is as follows. When the center line of the sleeve is positioned to coincide with the center line of the elbow, the first cutting line (C1) coincides with the straight line connecting the center of the sleeve and the center of the arc of the elbow center line. The second cutting line (C2) is perpendicular to the first cutting line (C1) and coincides with a straight line passing through the center of the sleeve.

Meanwhile, the principle of creating the variable mounting means 30 by adding a first cutting line (C1) and a second cutting line (C2) that are approximately orthogonal to the standard sleeve member is applied in the same way to elbows and sleeves of other standards. do.

As a detailed configuration of the present invention, the step (B) forms a long-side member A1, a short-side member A2, a long-side member B1, and a short-side member B2, and forms the lower base 31 with member A1 and member B1. At the same time, the upper stand 32 is formed using member A2 and member B2. The variable mounting means 30 of the present invention constructs the lower stand 31 and the upper stand 32 by welding members cut from straight pipe sleeves. In order to tightly support the elbow, the lower stand 31 and the upper stand 32 are preferably curved.

Referring to Figures 2 and 3, the lower stand 31 and the upper stand 32 of the variable mounting means 30 are illustrated in a state in which they tightly grip the surface of the approximately middle portion of the elbow. The lower band 31 is a relatively wide fan shape to support the outer surface of the elbow, and the upper band 32 is a relatively narrow fan shape to support the inner surface of the elbow. The long side means a wide fan shape, and the short side means a narrow fan shape.

To describe step (B) of the present invention in more detail, the sleeve member is created with a first member (A0) and a second member (B0) by a first cutting line (C1) inclined in the radial direction, and then the axis The first member A0 is divided into members A1 and A2 and the second member B0 is divided into members B1 and B2 by the second cutting line C2 inclined in this direction. As shown in the figure, when the divided members A1 and A2 are flipped up and down, the members A1 and B1 become the lower members 31 and the members A2 and B2 become the upper members 32. The lower base 31 is completed by welding the long-side members A1 and B1 and joining the flange 35, and the upper base 32 is completed by welding the short-side members A2 and B2 and joining the flange 35. The center lines of the lower bar 31 and the upper bar 32 are similarly aligned with the center line of the elbow, and the inner surfaces of the lower bar 31 and upper bars 32 are also similarly aligned with the surface (outer surface) of the elbow.

As a detailed configuration of the present invention, step (B) combines the support 33 connecting the main body 20 and the lower stand 31, and the support 33 is configured to make the lower stand 31 removable. It is characterized by It is preferable that the support 33 interposed between the main body 20 and the lower stand 31 connects the lower stand 31 in a detachable manner. Referring to Figure 5, the lower stand 31 coupled to the end of the support stand 33 is formed in a structure such as bolting (not shown) so that it is detachable. If the specifications of the elbow change, the main body 20 can be shared by replacing the lower base 31.

Step (C) according to the present invention involves forming a lower base 31 and an upper base 32 using four-split sleeve members and joining them to the main body 20. The elbow can be held at the end of the main body 20 by the lower stand 31 in contact with the outer peripheral surface of the elbow and the upper stand 32 in contact with the inner peripheral surface of the elbow. The lower stand 31 and the upper stand 32 each have flanges 35 at opposing ends, and the opposing flanges 35 can be easily attached and detached using a fastening member 37 such as a bolt.

Of course, bolting is generally preferred for the fastening member 37, but the hinge-locking method can also be applied.

As a detailed configuration of the present invention, step (C) is characterized in that the flange mounting base 25 is further coupled to the end of the main body 20 opposite to where the lower base 31 is coupled. Referring to FIG. 2, the flange mounting base 25 is fixed to the right end of the main body 20. The flange mounting base 25 is used to mount piping materials having flanges and is provided with a plurality of fastening grooves. Of course, the flange mounting base 25 can also be detachably coupled to the main body 20.

For reference, referring to Figure 5, the lower stand 31 is fixed to the end of the main body 20 via the support 33, an elbow is mounted on the lower stand 31, the upper stand 32 is covered, and then fastened. Clamping is performed using member 37. When the main body 20 in this state is engaged with the grip part 15 of the rotator 10 and rotated at low speed, welding of the desired piping material is completed.

The present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and changes can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such variations or modifications fall within the scope of the patent claims of the present invention.

10: rotator 15: gripper
20: Main body 25: Flange mounting base
30: Variable mounting means 31: Lower base
32: upper bar 33: support bar
35: Flange 37: Fastening member
A0, A1, A2: First member BO, B1, B2: Second member
C1: First cutting line C2: Second cutting line

Claims (5)

In the method of manufacturing a jig for welding a pipe elbow:
(A) preparing a main body 20 and a sleeve member corresponding to the outer diameter of the elbow;
(B) dividing the sleeve member into four into a first cutting line (C1) inclined in the radial direction and a second cutting line (C2) inclined in the axial direction; and
(C) forming a lower base 31 and an upper base 32 with four divided sleeve members and coupling them to the main body 20;
In step (B), the first cutting line (C1) is set to pass through the center of the sleeve member and the center of the elbow, and the second cutting line (C2) is set to pass through the center of the sleeve member and connect to the first cutting line (C1). A method of manufacturing a jig for welding a pipe elbow, characterized in that it is set vertically. delete In claim 1,
The step (B) forms the long side member A1, the short side member A2, the long side member B1, and the short side member B2, and forms the lower base 31 with member A1 and member B1, and at the same time forms the member A2 and member B2. A method of manufacturing a jig for welding a pipe elbow, characterized by forming an upper stand (32). In claim 1,
The step (B) is piping elbow welding, characterized in that the support 33 connecting the main body 20 and the lower stand 31 is coupled, and the support 33 is configured to be detachable from the lower stand 31. How to make a jig. In claim 1,
The step (C) is a method of manufacturing a jig for welding a pipe elbow, characterized in that the flange mounting base 25 is further coupled to the end of the main body 20 opposite to where the lower base 31 is connected.

Images