KR200422481Y1 - A copper pad of the welding bead removal flag - Google Patents

Abstract

The present invention relates to a copper pad (PAD) attached to a pivot bar (PIVOT BAR) for supporting a lower driving roll of a steel pipe (steel pipe) inner (inner surface) weld bead remover. High-frequency electric resistance welding (HF-ERW) method is formed after the steel strip (metal plate) cut to a certain width according to the outer diameter of the pipe (steel pipe) is formed in a circle by passing through rolls composed of a plurality of forming rolls. When manufacturing the steel pipe (steel pipe) by the welding, if the welding temperature is momentarily out of the proper heat input temperature, welding sparks (SPATTER, SPUTTER) generated by burrs and foreign matters on the cut surface of the cut steel strip (metal plate) Or spark due to inconsistency between welding speed and welding temperature and excessive upset amount, SPATTER, SPUTTER, SPARK, or BEAD, FLASH are made of steel pipe (steel). ) Press the lower driving roll of ID SCARFING MANDREL (aka bogie) to enter the inside (inside) and remove the beads on the inside of the steel pipe (steel pipe). Aka pinhole or eyeball). Since these defects not only cause product defects but also have a profound effect on productivity, the pads are bolted to the PIVOT BAR for supporting the lower drive roll of the bead remover for internal bead removal. It is attached and fixed, and is formed to be in close contact with a part of the inside (inner surface) of the steel pipe (steel pipe), the welding spark or melt bead generated during welding remains in the inside (inner surface) of the pipe, the pressing and stamping by the lower drive roll It is possible to prevent defects caused by flaws or grooves (aka, pinholes or eyeballs) in the steel pipe (steel pipe) inside (inner surface), thereby preventing the occurrence of the product, etc. A copper pad (PAD) attached to a pivoting bar (PIVOT BAR) for supporting a lower driving roll of a steel pipe (steel pipe) inner (inner surface) weld bead remover, characterized in that the quality level can be improved.

      Steel pipe (steel pipe), pinhole (eye ball), internal welding bead remover (bogie), pad, high frequency electric resistance welding

Description

A copper pad attached to the pivot bar for supporting the lower driving roll of the steel pipe inner (inner surface) weld bead remover {A copper pad of the welding bead removal flag}

1 is a schematic view of the working process of the steel pipe (steel pipe) is made by high-frequency electrical resistance welding

Figure 2 is a cross-sectional view of the coupling pad of the copper pad (PAD), attached to the pivot bar (PIVOT BAR) for supporting the inner (inner surface) weld bead remover lower drive roll of the present invention

Figure 3 is a cross-sectional view of the copper pad (PAD), attached to the pivot bar (PIVOT BAR) for supporting the inner drive roller remover lower drive roll of the present invention

4 is a perspective view of a copper pad (PAD) that is a component of the present invention

5 is a cross-sectional view of a steel pipe (steel pipe) in which scratches and grooves (aka pinholes or eyeballs) are generated on an inner surface thereof;

<Description of the symbols for the main parts of the drawings>

 10: weld bead remover (aka, bogie)

 20: PIVOT BAR 21: connection hole

 30: lower driving roll 40: upper driving roll

 50: copper pad (PAD) 51: bolt hole

 60: foreign matter (welding sparks and molten beads) 100: steel pipe (steel pipe)

 101: guide roll 102: squeeze roll

 103: iron pipe 104: work coil

 200: nicks and grooves (aka pinholes or eyeballs)

 The present invention relates to a copper pad (PAD) attached to a pivot bar (PIVOT BAR) for supporting a lower driving roll of a steel pipe (steel pipe) inner (inner surface) weld bead remover. High-frequency electric resistance welding (HF-ERW) method is formed after the steel strip (metal plate) cut to a certain width according to the outer diameter of the pipe (steel pipe) is formed in a circle by passing through rolls composed of a plurality of forming rolls. When manufacturing the steel pipe (steel pipe) by the welding, if the welding temperature is momentarily out of the proper heat input temperature, welding sparks (SPATTER, SPUTTER) generated by burrs and foreign matters on the cut surface of the cut steel strip (metal plate) Or spark due to inconsistency between welding speed and welding temperature and excessive upset amount, SPATTER, SPUTTER, SPARK, or BEAD, FLASH are made of steel pipe (steel). ) Pressed by lower driving roll 30 of ID SCARFING MANDREL (aka bogie) fixed to remove beads on inner surface of steel pipe (steel pipe) Or cause a groove (aka, pinhole or eyeball, 200). Since these defects not only cause product defects but also have a profound effect on productivity, in order to prevent this problem, the PAD is bolted to a pivot bar for supporting the lower drive roll of the weld bead remover for removing internal beads. It is attached to and fixed to the furnace, and is in a form of being in close contact with a part of the inside (inner surface) of the steel pipe (steel pipe), the welding spark or melt beads generated during welding remain in the inside of the pipe (inner surface), It is possible to prevent the chipping and the like, and to prevent defects caused by scratches or grooves (aka, pinholes or eyeballs) in the steel pipe (steel pipe) (inner surface). A copper pad (PAD) attached to a pivoting bar (PIVOT BAR) for supporting a lower driving roll of a steel pipe (steel pipe) inner (inner surface) weld bead remover, characterized in that the quality level can be improved.

Conventionally, there is no device for preventing the occurrence of a flaw or flaw (aka, pinhole or eyeball) inside the steel pipe, or a material such as urethane or rubber is directly applied to the body of the weld bead remover inside the steel pipe (inside). Although a method of fixing is employed, it is not easy to attach and detach, and it is not easy to fix, and wear or tear occurs due to material properties, and thus there is a problem in that deterioration occurs continuously. Due to this problem, the coolant is injected into the steel pipe 103 connected to the weld bead remover inside the steel pipe (steel pipe), and the coolant is passed through the iron pipe 103 so that the weld bead remover pivot bar (PIVOT BAR, 20). By spraying toward the lower driving roll, the foreign material (welding spark or molten bead) generated during welding was tried to be secured, but not only the foreign material could not flow in the steel pipe conveying direction by spraying the coolant, but also the foreign matter was transferred to the lower driving roll. Thereby, problems caused by the quality and productivity of the product have been raised by causing a flaw or groove (aka, pinhole or eyeball) inside the steel pipe (steel pipe).

Accordingly, an object of the present invention is to devise to improve the various conventional problems as described above, a fixed weld bead remover (bogie, ID) to remove the internal (inside) beads of the conventional steel pipe (steel pipe, 100) To solve the problem that the foreign material (welding spark and molten bead, 60) is pressed on the lower driving roll 30 of the SCARFING MANDREL, 10, causing a flaw or groove (aka, pinhole or eyeball, 200) in the steel pipe. To this end, a copper pad (PAD, 50) made of a material having excellent abrasion resistance and restoring ability is bolted and fixed to a pivot bar (PIVOT BAR) 20 for supporting the lower driving roll 30 of the weld bead remover 10. To compensate for the defects caused by the occurrence of flaws or grooves (aka, pinholes or eyeballs, 200) inside the steel pipe, the purpose is to enhance the technological competitiveness by raising the level of productivity and quality.

The present invention is a copper pad (PAD, 50) attached to the pivot bar (PIVOT BAR, 20) for supporting the lower driving roll of the steel pipe (steel pipe, 100) inside (inside) welding bead remover when manufacturing steel pipe (steel pipe, 100). In more detail, the steel strip (metal plate) cut to a certain width in accordance with the outer diameter of the steel pipe (steel pipe) to be manufactured to form a circular through a roll consisting of a plurality of forming rolls, When manufacturing the steel pipe (steel pipe, 100) by the electric resistance welding method (HIGH-FREQUENCY ELECTRIC RESISTANCE WELDING, HF-ERW), if the welding temperature is momentarily out of the proper heat input temperature, the cut surface of the cut steel strip (metal plate) Welding sparks (SPATTER, SPUTTER, SPARK) caused by burrs and foreign substances in the site or melted by melting inconsistency of welding speed and welding temperature and excessive upset amount , SPUTTER, SPARK) Alternatively, the BEAD, FLASH enters the inside of the steel pipe (steel pipe), and is fixed to the ID SCARFING MANDREL (aka, bogie, 10) fixed to remove the beads on the inside of the steel pipe (steel pipe). It is pressed by the lower drive roll 30 to cause a flaw or groove (aka, pinhole or eyeball, 200) in the pipe (inner surface). This defect not only causes a defect of the product but also has a profound effect on productivity. To prevent this, the copper pad (PAD) 50 supports a pivot bar (PIVOT) for supporting the lower driving roll 30 of the weld bead remover for removing internal beads. It is attached to and fixed to the BAR (20) with a bolt, and is in close contact with a part of the inside (inner surface) of the steel pipe (steel pipe, 100), so that foreign matter (welding spark or molten bead, 60) generated during the welding Remaining on the inner surface) to prevent pressing and chipping by the lower driving roll 30, and to generate a flaw or groove (aka, pinhole or eyeball, 200) inside the steel pipe (steel pipe). The lower driving roll support of the steel pipe (steel pipe) 100 (inside) weld bead remover, characterized by improving the productivity and the appearance (particularly the inner) quality level of the product by preventing defects caused by the defects. On the pivot bar (PIVOT BAR, 20) Nice of the present invention relates to copper pad (PAD, 50).

Referring to the configuration of the present invention in more detail through the accompanying drawings as follows.

1 is a schematic view showing the working process of making a steel pipe (steel pipe) by high-frequency electrical resistance welding,

High-frequency electrical resistance welding (HIGH-FREQUENCY ELECTRIC RESISTANCE WELDING) after forming a steel strip (metal plate) cut to a certain width in accordance with the outer diameter of the steel pipe (steel pipe, 100) to be manufactured by passing through rolls composed of a plurality of forming rolls. In the process of manufacturing the steel pipe (steel pipe, 100) by the HF-ERW method, after the steel pipe (steel pipe, 100) is passed through the work coil 104 and the squeeze roll 102 is made, The welding bead remover (bogie) 10 is configured in the inner (inner surface) to remove the inner (inner surface) beads of the welded portion, and the direction in which the steel pipe (steel pipe) 100 is driven is indicated by an arrow.

FIG. 2 is a cross-sectional view of a coupling pad of the pad PAD 50 attached to a pivot bar for supporting a lower driving roll of an inner (inside) weld bead remover according to the present invention.

In order to prevent foreign substances (welding sparks and molten beads, 60) from being pressed on the lower driving roll 30 positioned below the weld bead remover (bogie) 10, the copper pads PAD 50 are pivot bars PI20. ), And the direction in which the steel pipe is driven is indicated by an arrow.

Figure 3 is a cross-sectional view of the copper pad (PAD, 50) attached to the pivot bar (PIVOT BAR) for supporting the inner drive roller remover lower drive roll of the present invention,

One end of the pivot bar (PIVOT BAR) 20 constitutes a lower driving roll 30, and another end of the pivot bar is composed of a connection hole 21 for connecting to a weld bead remover (bogie) 10, It relates to the copper pad PAD 50 of the present invention attached to the bottom of the bar PIVOT BAR 20.

 4 is a perspective view of a copper pad (PAD) 50 that is a component of the present invention,

One end of the copper pad (PAD, 50) is in close contact with the inner surface of the steel pipe (steel pipe, 100) to prevent the foreign matter (welding spark and molten bead, 60) toward the lower drive roll 30 to form an inverted “b” And the opposite end is composed of a plurality of bolt holes 51 for attaching and fixing the bolt to the pivot bar (PIVOT BAR, 20).

FIG. 5 is a cross-sectional view of a steel pipe (steel pipe) 100 in which flaws and grooves (pinholes or eyeballs 200) are generated on an inner surface thereof.

When the copper pad (PAD, 50) is not installed on the pivot bar (PIVOT BAR, 20) for supporting the lower driving roll of the weld bead remover of the present invention, a flaw that is likely to occur inside (inside) the steel pipe (steel pipe, 100) and It relates to a steel pipe (steel pipe 100) in which a defect occurs due to a groove (pinhole or eyeball 200).

As described above, although the present invention has been described above, it is not necessarily limited thereto, and various modifications may be made without departing from the scope and spirit of the present invention.

Referring to the effects of the above-described configuration and operation in detail as follows.

The present invention is excellent in the original recovery force in the pivot bar (PIVOT BAR, 20) for supporting the lower driving roll 30 of the inner welding bead remover (bogie, 10) to prevent the occurrence of grooves and grooves (pinhole or eyeball, 200) The present invention relates to the adhesion of copper pads (PAD) 50 having excellent abrasion resistance. By using such a copper pad (PAD, 50), while preventing product defects due to scratches and grooves (pinhole or eyeball, 200), while improving the ease of replacement and replacement cycle, improve productivity and genuine recovery rate In addition, it improves the quality level of products and strengthens the competitiveness of technology and products.

Claims (1)

When manufacturing steel pipe (steel pipe, 100) by high-frequency electrical resistance welding (HF-ERW) method, it is fixed to remove welding beads inside (inside) steel pipe (steel pipe, 100). Welded bead remover (bogie 10), A station installed to remove foreign substances (welding sparks and molten beads, 60, etc.) remaining on the inner surface of the pipe by attaching and fixing them to the lower part of the PIVOT BAR 20 of the weld bead remover (bogie) 10. Attached to a pivot bar (PIVOT BAR, 20) for supporting the lower drive roll of the steel pipe (steel pipe) 100 (inside) weld bead remover, characterized in that it is constructed of a “shaped copper pad (PAD) 50”. Copper pads (PAD, 50).

Images