KR102519879B1 - Pre-processing device for pipe welding - Google Patents

Abstract

The present invention relates to a pre-processing device for pipe welding. The purpose of the present invention is to provide a pre-processing device for pipe welding, enabling a user using a grinder to evenly remove foreign substances at the end of a pipe by automatically rotating the pipe. The pre-processing device for pipe welding includes: a rail structure (10) including a pair of support rails (11) supported on the bottom; a fixed table (20) installed by being fixed to the front side of the support rail (11); a pipe driving and supporting unit (30) automatically rotating a front side of the pipe (P) while rotatably supporting the front side of the pipe (P) by a front driving roller (31) and a front driven roller (34); a front roller interval varying unit (40) varying intervals by moving the front driven roller (34) toward the front driving roller (31); a transfer table (50) arranged on a rear side of the support rail (11) to be transferred; a driven pipe supporting unit (60) rotatably supporting the rear side of the pipe (P) by first and second rear driven rollers (61, 64); a rear roller interval varying unit (70) varying the intervals by moving the second rear driven roller (64) toward the first rear driven roller (61); and an interval interlocking and operating unit (80) operating the rear roller interval varying unit (70) by being interlocked with the front roller interval varying unit (40).

Description

Pre-processing device for pipe welding}

The present invention relates to a preprocessor for welding a tubular body, and more particularly, to a preprocessor for welding a tubular body capable of quickly removing foreign substances from an end so that a tubular body can be perfectly welded to another tubular body.

In general, a number of piping facilities through which fluid is transported are operated in a plant. Pipeline facilities are connected by mutually welding both ends of several pipe bodies, and at this time, the welded part must be perfectly welded so as not to cause load or leakage of the pipe itself.

On the other hand, tube bodies used in piping facilities are welded after being manufactured in a factory and transported to a plant site, and oil or corrosive foreign substances are generated as a lot of time elapses during manufacturing, transportation, and storage. Since these foreign substances degrade welding quality when welding the pipe body, it is absolutely necessary to remove foreign substances from both ends of the pipe body. Usually, foreign matter removal is carried out by a worker holding a grinding grinder and grinding along the end of the tube body.

However, since the cross section of the tubular body has a circular shape, in order to remove foreign substances from the end of the tubular body, the operator has to perform grinding work while moving the grinding grinder three-dimensionally with a large motion, so skilled skills are required. If the removal of foreign matter at the end of the tube body is not completely done, the welding quality becomes unstable, which causes cracks or leaks over time.

The present invention has been created to solve the above problems, and to provide a tubular welding pretreatment device that allows a worker using a grinding grinder to uniformly remove foreign substances from the end of the tubular body by automatically rotating the tubular body. do.

In order to achieve the above object, the tubular welding pretreatment apparatus according to the present invention includes a rail structure 10 including a pair of support rails 11 supported on the floor; A fixed table 20 fixed to the front side of the support rail 11; a tube body drive support unit 30 that automatically rotationally drives the front side of the tube body P while rotatably supporting the front side of the tube body P by the front driving roller 31 and the front driven roller 34; a front roller spacing variable unit 40 for varying the spacing by moving the front driven roller 34 toward the front driving roller 31; A transfer table 50 disposed to be transferable on the rear side of the support rail 11; a pipe body driven support part 60 rotatably supporting the rear side of the pipe body P by means of first and second rear driven rollers 61 and 64; a rear roller spacing varying unit 70 that moves the second rear driven roller 64 toward the first rear driven roller 61 to change the spacing; and a distance interlocking operation unit 80 interlocking with the front roller spacing varying unit 40 to operate the rear roller spacing varying unit 70.

In the present invention, the body driving support part 30 is a front drive roller rotatably coupled to a front fixing bracket 31a fixed in a direction orthogonal to the support rail 11 of the fixing table 20. 31, a driving motor 32 supported by the fixed table 20 and generating a rotational driving force for rotating the front drive roller 31, and the support rail 11 attached to the fixed table 20 The front guide rail 33 installed in the orthogonal direction based on the front guide rail 33 and the front driven roller 34 rotatably coupled to the forward transfer bracket 34a moving forward and backward along the front guide rail 33 contain; The pipe body driven support part 60 includes a first rear driven roller 61 rotatably coupled to a rear fixing bracket 61a fixed to the transfer table 50 in a direction orthogonal to the support rail 11. And, a rear guide rail 63 installed on the transfer table 50 in a direction orthogonal to the support rail 11, and a rear transfer bracket that moves forward and backward along the rear guide rail 63 so as not to deviate ( 64a) includes a second rear driven roller 64 rotatably supported.

In the present invention, the distance interlocking operation part 80 is installed on the fixed table 20 and is axially coupled with the front screw 42 of the front roller distance variable part 40 to make the front screw 42 A front bevel gearbox 81 that converts and transmits rotational force in an orthogonal direction, and a power transmission rod 82 that is shaft-coupled with the front bevel gearbox 81 and rotates in conjunction with the front screw 42, A power transmission pipe 83 that is connected to the power transmission rod 82 in a non-rotating and extensible manner and is installed on the transfer table 50 by converting the rotational force of the power transmission pipe 83 in an orthogonal direction so that the rear roller It includes a rear bevel gearbox 84 that transmits to the rear screw 72 of the variable interval 70.

In the present invention, as being installed on the fixed table 20, it further includes a grinder support 90 for three-dimensionally supporting the grinding grinder (G) for removing foreign substances from the end of the tube body (P).

In the present invention, the grinder support part 90 includes a first linear rail 91 installed on the fixed table 20 and a first linear block 92 moving forward and backward along the first linear rail 91. ), the second linear rail 93 installed in the orthogonal direction to the first linear block 92, the second linear block 94 moving forward and backward along the second linear rail 93, and the 2 includes a rotation stage 95 rotatably installed on the linear block 94 and a jig 96 installed on the rotation stage 95 to fix the position of the grinding grinder.

In the present invention, as being installed on the transfer table 50, a slip prevention unit 100 for preventing the tube body P from being pushed while removing foreign substances with the grinding grinder G; further includes.

In the present invention, the anti-slip part 100 is rotated and supported by the guide housing 101 fixed to the transfer table 50 and the side walls 101a of the guide housing 101, and the support A sub-screw 102 arranged in a direction orthogonal to the rail 11, a block slider 103 screwed to the sub-screw 102 inside the guide housing 101, and the block slider 103 A roller bracket 104 coupled to the upper side of the roller bracket 104, a slip prevention roller 105 rotatably coupled to the roller bracket 104, and coupled to the sub-screw 102 from the outside of the guide housing 101 and a knob knob 106 for forward and reverse rotation of the sub screw 102.

According to the present invention, the pipe body drive support part 30 supported by the fixed table 20 and the pipe body driven support part 60 supported by the transfer table 50 are employed, and the front roller distance variable part 40 and the rear roller distance By adopting the variable unit 70 and employing the interval interlocking operation unit 80, it is possible to universally arrange and automatically rotate the tube body P of various diameters and lengths.

In addition, since the tube body (P) is automatically rotated, foreign substances can be uniformly removed by a simple operation of bringing the grinding wheel (G1) of the grinding grinder (G) in close contact with the end of the tube body, thereby making the welding quality of the tube body uniform. can

In addition, by the grinder support part 90 supported by the fixed table 20, even if the diameter of the pipe body P is large or small, the grinding grinder G can be moved to the end of the pipe body or the surface around the end, and the direction can be changed. It is possible to perform pretreatment of the end of the tube body (P) of various diameters according to.

In addition, by the anti-pull unit 100, it is possible to prevent the tube body P from being pushed by the grinding grinder G during the removal of foreign substances by the grinding grinder G.

1 is a view for explaining the overall configuration of a tubular welding pretreatment apparatus according to the present invention;
Figure 2 is a side view for explaining the configuration of the tube body driving support and the front roller interval variable part installed on the fixed table of Figure 1;
3 is a view for explaining the configuration of a pipe body driven support part and a rear roller interval variable part installed on the transfer table of FIG. 1;
4 is a cross-sectional view taken along line IV-IV in FIG. 1;
Figure 5 is a view for explaining that the tube body for end pretreatment is rotatably raised to the tube body driven support unit and the tube body driven support unit of Figure 1;
6 is a view for explaining that a thick and long tube body can be mounted on the tube body driving support and the tube body driven support unit of FIG. 5;
Figure 7 is a view for explaining the configuration by extracting the grinder support installed on the fixed table of Figure 1;
8 is a view for explaining the operation of the grinder support unit of FIG. 7;
Figure 9 is a perspective view showing an extract of the anti-slipper installed on the transfer table of Figure 1;
10 is a cross-sectional view taken along line XX of FIG. 9;

Hereinafter, a tubular welding pretreatment apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, what is described as "above" or "above" may include not only what is directly on top of contact but also what is on top of non-contact. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. Terms are only used to distinguish one component from another. Singular expressions include plural expressions unless the context clearly dictates otherwise. In addition, when a certain component is said to "include", this means that it may further include other components without excluding other components unless otherwise stated. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation. In addition, in the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to the illustrated bar.

1 is a view for explaining the overall configuration of a tubular welding pretreatment apparatus according to the present invention, and FIG. 2 is a side view for explaining the configuration of a tubular driving support unit and a variable front roller interval installed on the fixed table of FIG. 1, FIG. 3 is a view for explaining the configuration of the pipe body driven support part and the rear roller spacing variable part installed on the transfer table of FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. In addition, FIG. 5 is a view for explaining that the pipe body for end pretreatment is rotatably raised to the pipe body driving support and the pipe body driven support of FIG. 1, and FIG. 6 is a thick and long It is a drawing for explaining that the pipe body can be raised.

As shown, the tubular welding pretreatment apparatus according to the present invention includes a rail structure 10 including a pair of support rails 11 supported on the floor; A fixed table 20 fixed to the front side of the support rail 11; As supported by the fixed table 20, the front side of the body P is rotatably supported by the front drive roller 31 and the front driven roller 34 while automatically rotating and driving the body drive support 30 and ; a front roller interval varying unit 40 that moves the front driven roller 34 toward the front driving roller 31 to vary the interval; a transfer table 50 disposed to be transferable on the rear side of the support rail 11; a pipe body driven support part 60 supported by the transfer table 50 and rotatably supporting the rear side of the pipe body P by the first and second rear driven rollers 61 and 64; a rear roller interval varying unit 70 for varying the interval by moving the second rear driven roller 64 toward the first rear driven roller 61; Interlocking with the front roller spacing variable unit 40 to operate the rear roller spacing variable unit 70 and the distance interlocking operation unit 80; A grinder support part 90 which is installed on the fixed table 20 and three-dimensionally supports the grinding grinder G for removing foreign substances from the end of the tube body P; It is installed on the transfer table 50 and is characterized in that it includes; a slip prevention unit 100 for preventing the pipe body P from being pushed while removing foreign substances with the grinding grinder G.

The rail structure 10 is composed of a pair of support rails 11 installed on the floor of the site, and the support rail 11 has a U-shaped cross section so that the upper side is opened.

On the bottom side of the fixed table 20, a fixed end 21 inserted into and fixed to the front side of the support rail 11 is installed, and on the inside, a drive motor 32 constituting a pipe body drive support part 30 to be described later is installed. do.

The tube body driving support part 30 includes a front driving roller 31 rotatably coupled to a front fixing bracket 31a fixed in a direction orthogonal to the support rail 11 of the fixed table 20, and a fixed table 20 A drive motor 32 supported on the front drive roller 31 to generate rotational driving force for rotating the front drive roller 31, and a front guide rail 33 installed in a direction orthogonal to the support rail 11 on the fixed table 20 and a front driven roller 34 rotatably coupled to the forward transfer bracket 34a that moves forward and backward along the front guide rail 33 so as not to deviate.

The front driving roller 31 is rotatably coupled to the front fixing bracket 31a fixed to the fixed table 20, and the front driven roller 34 is a front conveying bracket that moves forward and backward along the front guide rail 33 ( By being rotatably coupled to 34a), a space in which the tube body P can be disposed is formed between the front drive roller 31 and the front driven roller 34.

Friction rims 31b and 34b are installed on the outer peripheral surfaces of the front driving roller 31 and the front driven roller 34. The friction rims 31b and 34b prevent the tube body P from spinning by applying frictional force to the tube body P when the tube body P is disposed between the front drive roller 31 and the front driven roller 34 and rotates. In addition, it is possible to prevent damage such as scratches on the surface of the tube body P by the load of the tube body itself.

The driving motor 32 is a geared motor for generating deceleration and large rotational driving force. As shown in FIG. 2, the first sprocket 35a is axially coupled to the rotational shaft of the driving motor 32, and the front driving roller ( 31), the second sprocket 35b is installed on the rotating shaft, and the chain 35c is wound around the first and second sprockets 35a and 35b, so that the rotational driving force of the drive motor 32 is driven by the chain 35c and By being transferred to the front drive roller 31 through the second sprocket 35b, the front drive roller 31 is automatically rotated.

As shown in FIG. 2, the front roller spacing variable part 40 is rotatably coupled to a pair of front bearing supports 41 installed on the fixed table 20 and the front bearing support 41, and the front roller It includes a front screw 42 screwed to the transfer bracket 34a and a handle 43 connected to rotate the front screw 42.

The front bearing support 41 is fixed to the fixed table 20 in a direction orthogonal to the support rail 11 and rotatably supports both ends of the front screw 42 .

The front screw 42 is screwed with the front transfer bracket 34a, so that the front driven roller 34 rotatably supported by the front transfer bracket 34a moves forward or backward as it is rotated forward and backward by the handle 43. can be transported.

When the front roller spacing variable unit 40 rotates the front screw 42 by forward and reverse rotation of the handle 43, the forward transfer bracket 34a screwed to the front screw moves forward and backward, and thus the forward transfer bracket ( The distance between the front driven rollers 34 rotatably supported on 34a) is changed as they approach or move away from the front drive rollers 31.

At the bottom side of the transfer table 50, a wheel 51 is installed to be transportably inserted into the rear side of the support rail 11. The transfer table 50 may move forward or backward toward the fixed table 20 .

The pipe body driven support unit 60 includes a first rear driven roller 61 rotatably coupled to a rear fixing bracket 61a fixed to the transfer table 50 in a direction orthogonal to the support rail 11, and transport A rear guide rail 63 installed in a direction orthogonal to the support rail 11 on the table 50 and a rear transfer bracket 64a moving forward and backward along the rear guide rail 63 so as not to be rotatably rotated. and a second rear driven roller 64 supported thereon.

The first rear driven roller 61 is rotatably coupled to the rear fixing bracket 61a fixed to the transfer table 50, and the second rear driven roller 64 moves forward and backward along the rear guide rail 63. By being rotatably coupled to the rear transfer bracket 64a, a space in which the tube body P can be disposed is formed between the first and second rear driven rollers 61 and 64.

Friction rims 61b and 64b are installed on the outer circumferential surfaces of the first and second rear driven rollers 61 and 64. When the tube body P is arranged between the first and second rear driven rollers 61 and 64 and rotates, the friction rims 61b and 64b apply frictional force to the tube body P and thereby It is possible to prevent damage such as scratches on the surface of the tube body P from occurring.

The rear roller spacing variable part 70 is rotatably coupled to a pair of rear bearing supports 71 installed on the transfer table 50 and the rear bearing support 71, and is screwed to the rear transfer bracket 64a. It includes a rear screw 72 to be.

The rear bearing support 71 is fixed to the transfer table 50 in a direction orthogonal to the support rail 11 and rotatably supports both ends of the rear screw 72 .

The rear screw 72 is screw-coupled with the rear transport bracket 64a, so that the rear driven roller 64 rotatably supported by the rear transport bracket 64a can be transported forward or backward as it rotates forward and backward.

When the rear screw 72 is rotated by the distance interlocking operation unit 80 to be described later, the rear roller spacing variable unit 70 moves forward and backward, and the rear transfer bracket 64a screwed to the front screw moves forward and backward. The distance between the second rear driven roller 64 rotatably supported by the transfer bracket 64a is changed as it approaches or moves away from the first rear driven roller 61.

As shown in FIGS. 1 and 4 , the spacing interlocking operation unit 80 is installed on the fixed table 20 and is axially coupled with the front screw 42 of the front roller spacing variable unit 40 to screw the front screw 42 ) A front bevel gearbox 81 that converts and transmits the rotational force in the orthogonal direction, a power transmission rod 82 that is shaft-coupled with the front bevel gearbox 81 and rotated in conjunction with the front screw 42, and power The power transmission pipe 83 connected to the transmission rod 82 in a non-rotating and elastic manner, and the rear roller spacing variable unit ( and a rear bevel gearbox 84 that transmits to the rear screw 72 of 70).

The front bevel gearbox 81 is axially coupled with the front screw 42 to convert the rotational force of the front screw 42 in the orthogonal direction and transmits it to the power transmission rod 982.

A protrusion 82a is formed on the outer circumferential surface of the power transmission rod 82, and a protrusion groove 83a engaged with the protrusion 82a is formed on the inner circumferential surface of the power transmission pipe 83. Accordingly, even if the power transmission rod 82 is immersed in or out of the power transmission pipe 83, it maintains a non-rotating coupled state.

The rear bevel gearbox 84 converts the rotational force transmitted through the power transmission pipe 83 into an orthogonal direction and transmits it to the rear screw 72.

The front bevel gearbox 81 and the rear bevel gearbox 84 have bevel gear assemblies built into them so that applied power can be converted in an orthogonal direction, and these front bevel gearboxes and rear bevel gearboxes are mechanical engineering Since it is a common technique in the field, further detailed description is omitted.

When the front screw 42 is rotated by rotating the handle 43 of the front roller spacing variable unit 40 by the distance interlocking operation unit 80, the rotational force of the front screw 42 is the front bevel gearbox 81 ), the power transmission rod 82, the power transmission pipe 83, and the rear bevel gearbox 84 are transmitted to the rear screw 72. Accordingly, the front driven roller 34 is moved toward the front drive roller 31 by the operation of the handle 43, and at the same time, the second rear driven roller 64 moves toward the first rear driven roller 61 in the same direction. And it can be moved by the interval.

With this structure, in the state shown in FIG. 1, the front side of the body P is disposed between the front drive roller 31 and the front driven roller 34, and the first and second rear driven rollers 61 ( 64), when the rear side of the tube body P is disposed between the tube bodies P, as shown in FIG. 5, a state in which the tube body P can rotate.

On the other hand, when the front screw 42 is rotated using the handle 43 of the front roller interval variable part 40, the distance between the front drive roller 31 and the front driven roller 34 is widened, and at the same time, the interval interlocking operation unit 80 is operated to widen the gap between the first and second rear driven rollers 61 and 64. And when the transfer table 50 is transferred to the rear side, as shown in FIG. 6, the tube body P', which is thicker and longer than the tube body of FIG. can be placed.

FIG. 7 is a view for explaining the configuration of the grinder support part extracted from the fixed table of FIG. 1 , and FIG. 8 is a view for explaining the operation of the grinder support part of FIG. 7 .

The grinder support 90 includes a first linear rail 91 installed on the fixed table 20, a first linear block 92 moving forward and backward along the first linear rail 91, and a first linear block ( 92), the second linear rail 93 installed in the orthogonal direction, the second linear block 94 moving forward and backward along the second linear rail 93, and rotatably installed on the second linear block 94 It includes a rotation stage 95 and a jig 96 installed on the rotation stage 95 to fix the position of the grinding grinder.

By the grinder support 90, the rotation stage 95 can be moved forward and backward and left and right while the grinding grinder G is inserted into the jig 96 and fixed in position, and can rotate at the same time. Accordingly, the position and angle of the grinding wheel (G1) of the grinding grinder (G) can be varied in three dimensions, so that the pre-grinding treatment of the end of the tube body is possible regardless of the size of the tube body. That is, even if the diameter of the tube body (P) is large or small, the grinding grinder (G) can be moved and directed to the end of the tube body or the surface around the end to perform pretreatment of the end of the tube body (P) of various diameters. .

Here, the grinding grinder (G) forms a cylindrical body in which a geared motor is built in, and a grinding wheel (G1) is connected to a rotating shaft extending from the geared motor. The grinding grinder (G) removes foreign substances by bringing the rotating grinding wheel (G1) into close contact with the end surface of the tubular body.

FIG. 9 is a perspective view of an anti-slip portion installed on the transfer table of FIG. 1 and FIG. 10 is a cross-sectional view taken along line X-X of FIG. 9 .

The anti-slip unit 100 is rotated and supported by the guide housing 101 fixed to the transfer table 50 and the side walls 101a of the guide housing 101 in a direction orthogonal to the support rail 11. The sub-screw 102 disposed in the guide housing 101, the block slider 103 screwed to the sub-screw 102 inside the guide housing 101, the roller bracket 104 coupled to the upper side of the block slider 103, , the anti-slip roller 105 rotatably coupled to the roller bracket 104 and in close contact with the end of the tube body P, and the sub-screw 102 coupled to the sub-screw 102 from the outside of the guide housing 101 ) and a knob handle 106 for forward and reverse rotation.

The block slider 103 moves forward and backward by the rotation of the sub screw 102 inside the guide housing 101.

The anti-skid roller 105 protrudes toward the front side of the roller bracket 104, and the anti-skid roller 105 is in close contact with the end of the tubular body. The anti-skidding roller 105 is rotated together when the tube body P is rotated by being in close contact with the end of the tube body P.

The roller bracket 104 can change the position of the anti-skidding roller 105 by being transported by the block slider 103. Accordingly, when the diameter of the tubular body is changed, the position of the anti-slip roller 105 may be changed so that the ends of the tubular body having a different diameter may be brought into close contact with each other.

When the tube body (P) is pushed backward by the pressure applied when foreign substances are removed by the grinding grinder (G) by the anti-skimming unit 100, the end of the tube body P is on the anti-milling roller 105. Pushing is prevented by this, and thus the foreign matter grinding operation can proceed effectively.

As described above, according to the present invention, the tube body drive support unit 30 supported by the fixed table 20 and the tube body driven support unit 60 supported by the transfer table 50 are employed, and the front roller interval variable unit 40 and By adopting the rear roller interval variable part 70 and adopting the interval interlocking operation unit 80, it is possible to universally arrange and automatically rotate the tube body P of various diameters and lengths.

In addition, since the tube body (P) rotates automatically, foreign substances on the welding end can be uniformly removed by a simple operation of bringing the grinding wheel (G1) of the grinding grinder (G) in close contact with the end of the tube body, thereby improving the welding quality of the tube body. can be done evenly.

In addition, by the grinder support 90 supported on the fixed table 20, even if the diameter of the tube body P is large or small, the grinding grinder G can be moved to the surface of the end of the tube body and the direction can be changed. It is possible to perform pretreatment of the end of the tube body (P) of the diameter.

In addition, by the anti-pull unit 100, it is possible to prevent the tube body P from being pushed by the grinding grinder G during the removal of foreign substances by the grinding grinder G.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

10 ... rail structure 11 ... support rail
20 ... fixed table 21 ... fixed end
30 ... tube body drive support 31 ... front drive roller
31a ... front fixing bracket 32 ... drive motor
33 ... front guide rail 34 ... front driven roller
35a ... 1st sprocket 35b ... 2nd sprocket
35c ... Chain 40 ... Front roller interval variable part
41 ... front bearing support 42 ... front screw
43 ... handle 50 ... transfer table
51 ... wheel 60 ... tube body driven support
61 ... first rear driven roller 61a ... rear fixing bracket
63 ... rear guide rail 64 ... second rear driven roller
64a ... rear transfer bracket 70 ... rear roller interval variable part
71 ... rear bearing support 72 ... rear screw
80 ... Gap interlocking operation part 81 ... Front bevel gearbox
82 ... power transmission rod 82a ... protrusion
83 ... power transmission pipe 83a ... projection groove
84 ... rear bevel gearbox 90 ... grinder support
91 ... 1st linear rail 92 ... 1st linear block
93 ... 2nd linear rail 94 ... 2nd linear block
95 ... rotation stage 96 ... jig
100 ... slip prevention part 101 ... guide housing
102 ... Sub screw 103 ... Block slider
104 ... roller bracket 105 ... anti-skid roller
106 ... Knob handle

Claims (7)

A rail structure 10 including a pair of support rails 11 supported on the floor;
A fixed table 20 fixed to the front side of the support rail 11;
As supported by the fixed table 20, the front side of the body P is rotatably supported by the front drive roller 31 and the front driven roller 34 while automatically rotating and driving the body drive support unit 30 ;
a front roller spacing variable unit 40 for varying the spacing by moving the front driven roller 34 toward the front driving roller 31;
A transfer table 50 disposed to be transferable on the rear side of the support rail 11;
a pipe body driven support part 60 supported by the transfer table 50 and rotatably supporting the rear side of the pipe body P by the first and second rear driven rollers 61 and 64;
a rear roller spacing varying unit 70 that moves the second rear driven roller 64 toward the first rear driven roller 61 to change the spacing; and
Characterized in that it comprises a,; a tubular welding preprocessing device comprising: a distance interlocking operation unit 80 that is interlocked with the front roller spacing variable unit 40 to operate the rear roller spacing variable unit 70. According to claim 1,
The body driving support part 30 includes a front driving roller 31 rotatably coupled to a front fixing bracket 31a fixed in a direction orthogonal to the support rail 11 of the fixing table 20, and A drive motor 32 supported by the fixed table 20 and generating rotational driving force for rotating the front drive roller 31, and a direction orthogonal to the fixed table 20 with respect to the support rail 11 It includes a front guide rail 33 installed as and a front driven roller 34 rotatably coupled to the forward and backward transfer brackets 34a that move forward and backward along the front guide rail 33;
The pipe body driven support part 60 includes a first rear driven roller 61 rotatably coupled to a rear fixing bracket 61a fixed to the transfer table 50 in a direction orthogonal to the support rail 11. And, a rear guide rail 63 installed on the transfer table 50 in a direction orthogonal to the support rail 11, and a rear transfer bracket that moves forward and backward along the rear guide rail 63 so as not to deviate ( 64a) comprising a second rear driven roller 64 rotatably supported; characterized in that, the tubular welding preprocessor. The method of claim 1, wherein the interval interlocking operation unit 80,
It is installed on the fixed table 20 and is axially coupled with the front screw 42 of the front roller spacing variable part 40 to convert and transmit the rotational force of the front screw 42 in the orthogonal direction (81). )and,
A power transmission rod 82 coupled to the front bevel gearbox 81 and rotated in conjunction with the front screw 42;
A power transmission pipe 83 connected to the power transmission rod 82 in a non-rotatable and flexible manner;
A rear bevel gearbox 84 installed on the transfer table 50 converts the rotational force of the power transmission pipe 83 in an orthogonal direction and transmits it to the rear screw 72 of the rear roller spacing variable unit 70 Characterized in that it comprises, a tubular welding pretreatment device. According to claim 1,
It is installed on the fixed table (20) and further comprises a grinder support part (90) for three-dimensionally supporting the grinding grinder (G) for removing foreign substances from the end of the pipe body (P). Device. The method of claim 4, wherein the grinder support part 90,
A first linear rail 91 installed on the fixed table 20;
A first linear block 92 that moves forward and backward along the first linear rail 91;
A second linear rail 93 installed in a direction orthogonal to the first linear block 92;
A second linear block 94 that moves forward and backward along the second linear rail 93;
A rotation stage 95 rotatably installed on the second linear block 94;
Tubular welding pretreatment apparatus, characterized in that it comprises a jig 96 installed on the rotation stage 95 to fix the position of the grinding grinder. According to claim 1,
It is installed on the transfer table 50 and prevents the tube body (P) from being pushed while removing foreign substances with the grinding grinder (G). preprocessor. The method of claim 6, wherein the slip prevention unit 100,
A guide housing 101 fixed to the transfer table 50;
A sub-screw 102 that is rotatably supported on both side walls 101a of the guide housing 101 and disposed in a direction orthogonal to the support rail 11,
A block slider 103 screwed to the sub-screw 102 inside the guide housing 101;
A roller bracket 104 coupled to the upper side of the block slider 103,
An anti-slip roller 105 rotatably coupled to the roller bracket 104;
Tubular welding pretreatment device, characterized in that it comprises a knob handle 106 coupled to the sub-screw 102 from the outside of the guide housing 101 to forward and reverse rotate the sub-screw 102.

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