JP2919320B2 - Manufacturing equipment for ERW pipes with internal grooves - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention manufactures an electric resistance welded pipe having an inner diameter groove by rounding a pipe so that a large number of grooves provided on the surface of a metal plate become an inner surface and welding a butt edge. The present invention relates to an improvement in an apparatus for manufacturing an electric resistance welded pipe with an inner diameter groove, which removes oil and metal powder generated during molding and minimizes problems caused by welding defects generated during butt welding. is there.

[0002]

2. Description of the Related Art A conventional apparatus for manufacturing an electric resistance welded pipe will be described with reference to FIG. 3. In this apparatus, a metal plate strip T having a constant width is continuously fed from an uncoiler 1 by a driving device, and a rolling roll is rolled. A number of grooves are engraved on the surface of the strip material T by a roll 2, and then a plurality of forming rolls 3 are formed so that the groove surface becomes an inner surface.
The plate material T is gradually rounded by the forming roll group 4 and deformed to a C-shaped cross section in which both side edges of the plate material T are opposed to each other. A rolling separator 5 is interposed in the gap between the strips T processed into a C-shaped cross section to make the gap between the strips T constant. The strip material T is heated by the induction coil 6 provided after the rolling separator 5, and the edges of the strip material T are welded to each other by a squeeze roll 7.

When the metal pipe P is welded by the squeeze roll 7, the metal at the welded portion is pushed out of the metal pipe P, so that a so-called weld bead is generated on the outer surface of the metal pipe.
To remove this, on the downstream side of the squeeze roll 7,
A bead cutter 8 is set on the outer peripheral surface of the metal tube P, and the weld bead on the outer peripheral surface of the metal tube P is cut, and chips continuously flowing are removed outside the tube by a removing device. The metal pipe P for which the bead cutting has been completed is formed into a predetermined size by the straightening roll group 9, and the manufacture of the electric resistance welded pipe with the inner surface groove is completed.

In particular, recently, the wall thickness of the inner diameter grooved pipe has been reduced, and the shape of the inner diameter groove has been diversified or miniaturized such as an intersection groove and a fine uneven pattern. Full, intermittent, partial and so on. In the present application, such variously patterned processed pipes are collectively referred to as “inner diameter grooved pipe”, and the term “groove” includes such various types of fine processing.

[0005]

In the above-mentioned conventional apparatus, the surface and both side edges of the strip material T are formed by a rolling roll 2, a group of forming rolls 4 comprising a plurality of forming rolls 3, and a roll. −
In the process of the ring separator 5, etc., metal powder is generated at the time of passage, and oil applied at the time of processing remains on the surface of the strip material T. Adhered and contaminated state proceeds directly to the forming and welding process to lower the welding strength, or the induced current generated in the strip material T in the induction coil 6 is shorted by the metal powder, and the calorific value is generated. Therefore, there are many problems that the welding may be incomplete due to a decrease in the welding efficiency, and if the inner surface of the tube is dirty, the efficiency is reduced when the tube is used. The expression “metal powder” means not only powdery metal processing waste but also hair and other slightly elongated chips.

The present invention has been made in view of the above circumstances, and includes a strip material T, a rolling roll 2, a forming roll group 4 including a plurality of forming rolls 3, and a rolling separator-5. An object of the present invention is to provide an apparatus for manufacturing an electric resistance welded pipe with an inner surface groove, which prevents wear such as the above and metal powder from adhering to the surface and both end faces of the strip material T, thereby preventing occurrence of welding defects.

[0007] The present applicant has previously made an invention in Japanese Patent Application No. 5-70576 in which metal powder generated by friction between the strip material T and the rolling separator 5 is removed, and the quality of the electric resistance welded tube is improved. Successfully improved.

[0008] The present invention relates to an electric resistance welded pipe with an inner diameter groove, and solves more advanced problems and demands.
In the case of electric resistance welded tubes with internal grooves, high-frequency welding is extremely difficult because copper and aluminum-based materials are frequently used and the heat and electric conductivity are good, while the wall thickness of the tubes is being reduced. ing. In addition, in terms of applications, it is often used for mass consumption as the heart of cooling and heating products, and the quality requirements of customers are increasing. The present invention has succeeded in mass-producing a highly reliable electric resistance welded tube with an inner diameter groove, with highly suppressed defects in a high frequency weld. Therefore, the present invention completely removes not only the metal powder generated in the rolling separator part but also the metal powder generated in the rolled part and the formed part. The knowledge that complete removal of such metal powders is extremely important for mass production of high-quality, high-quality ERW pipes with an inner diameter groove has been obtained through the accumulation of operations and has reached the present invention. It is.

[0009]

In order to solve the above problems, a first apparatus for manufacturing a heat transfer tube with an inner diameter groove according to the present invention comprises:
A drive means for continuously running a metal plate having a constant width in the longitudinal direction, a carving means for carving a number of grooves on a surface of the running sheet metal by a rolling roll; A forming roll group for gradually rolling the sheet material in the width direction and deforming the sheet material into a C-shaped cross section is inserted into a gap between opposite side edges of the sheet material formed into a C-shaped cross section. A rolling separator for regulating the gap amount, a heating means for heating the strip material downstream of the rolling separator in the direction in which the strip material travels, and the plate at a downstream side of the heating means; A squeeze roll for abutting and welding both side edges of the strip material, and a blower for blowing off oil and metal powder adhering to the surface of the strip material immediately after or around the rolling roll. It is characterized by having provided. Further, a second apparatus for manufacturing a heat transfer tube with an inner diameter groove according to the present invention comprises a driving means for continuously running a metal plate having a constant width in a longitudinal direction, and a rolling roll on a surface of the running plate. Engraving means for engraving a large number of grooves, and a forming roller for stepwise rolling the plate material having the grooves engraved in the width direction to deform it into a C-shaped cross section.
And a rolling separator inserted in the gap between the opposite side edges of the plate member formed into a C-shaped cross section to regulate the amount of the gap, and the plate member traveling from the rolling separator. A heating means for heating the sheet material on the downstream side in the direction, and a squeeze roll for abutting and welding both side edges of the sheet material on the downstream side from the heating means, and Immediately after or at least one peripheral part of at least one forming roll, a blower for blowing off oil and metal powder adhering to the surface of the plate material is provided.
Further, a third apparatus for manufacturing a heat transfer tube with an inner diameter groove according to the present invention comprises a driving means for continuously running a metal plate having a constant width in the longitudinal direction, and a rolling roll on the surface of the running plate. Engraving means for engraving a large number of grooves, a group of forming rolls for gradually rolling the plate material having the grooves engraved in the width direction and deforming it into a C-shaped cross section, and a C-shaped cross section A rolling separator which is inserted into the gap between the opposite side edges of the plate-shaped member formed into a shape and regulates the amount of the gap, and the plate separated downstream from the rolling separator in the direction in which the plate-shaped member travels. A heating means for heating the strip, and a squeeze roll for abutting and welding both side edges of the plate strip on the downstream side of the heating means, and immediately after or around the rolling roll, A first-stage blower that blows off and removes oil and metal powder adhering to the surface of the strip material. A second-stage blower for blowing off and removing oil and metal powder adhering to the surface of the plate material immediately after or at least in the vicinity of at least one forming roll of the forming roll group; Further, a third-stage blower is provided immediately after or around the rolling separator to blow off and remove oil and metal powder adhering to the surface of the plate material.

[0010]

In the apparatus for manufacturing an electric resistance welded pipe with an inner groove according to the present invention,
Rolling roll 2 and a plurality of forming rolls as the strip material T runs
Forming roll group 4 consisting of roll 3, rolling separator
The metal powder generated by the friction with the metal material 5 and adhered to the surface of the strip material T is immediately after the necessary parts such as the rolling roll 2 for forming grooves, the forming roll group 4, the rolling separator 5, and the like. Immediately after the above, a blower 10 is provided to blow off together with the oil dropped and adhered during processing, and a suction nozzle 11 is provided near the blower 10 to remove the oil and metal powder blown off by the blower 10 by suction. In addition, welding defects caused by metal powder can be effectively prevented.

[0011]

FIG. 1 is a side view showing an embodiment of an apparatus for manufacturing an electric resistance welded pipe with an inner groove according to the present invention, and FIG. 2 is a view showing a blower and a suction apparatus according to the present invention. It is an expanded side view which shows the example provided immediately after.

This embodiment is characterized in that a blower 10 is attached to a place where a metal powder is generated, in particular, to blow off the metal powder attached to the side and surface of the plate material in the conventional apparatus. . If necessary, blower-10
The method is characterized in that the metal powder blown off in step (1) is collected by a suction device. The blower 10 is connected via a valve 14 to a blower pipe 12 to which high-pressure air is supplied from a high-pressure pump. The blower 10 is provided at a position where metal powder is generated, that is, immediately after the roll such as the rolling roll 2, the forming roll group 4, and the rolling separator 5, or at a preferable position in the peripheral portion thereof. The metal powder adhering to the surface and both end surfaces of the material T is blown off. In particular, in the case of the blower 10 provided on the rolling roll 2 in which grooves are formed, providing the blower 10 immediately after the rolling roll 2 is highly effective in removing oil and metal powder. In the embodiment, the blowers are provided immediately after all the rolls. However, if there is an efficient part, the blower may be provided at one place or at necessary plural places. The blower pipe may be provided with a branch pipe from a single main pipe as shown in the figure, or may be piped alone. Further, it is preferable to provide a valve 14 in each pipe to adjust the amount of air blow. Although the blower 10 is a single unit in the drawings of the embodiment, a plurality of blowers 10 may be provided in parallel or in up, down, front, rear, right and left depending on the situation.

Next, when the oil and metal powder adhered to the surface of the plate material T by the blower 10 are blown off, the scattered oil and metal powder reattach to other parts of the plate material T. In addition, since it scatters around the apparatus and adheres to the apparatus and the floor surface and becomes dirty and causes environmental pollution, it is not preferable. Therefore, a suction nozzle 11 is provided near the blower 10 to suck the scattered oil and metal powder. And remove it with a filter. The suction nozzles 11 may be installed individually, or may be connected to the exhaust pipe 13 to exhaust air. Alternatively, the locations where oil and metal powder are generated may be surrounded by box-shaped containers (not shown), and the generated locations may be suctioned and removed by a filter.

Therefore, in the apparatus for manufacturing an electric resistance welded pipe with an inner groove, an effect of removing oil and metal powder generated at the time of contact between the strip material T and each roll during processing is blown off by the blower 10. , The welding defects caused by the metal powder can be greatly reduced, and the reliability of the ERW pipe can be significantly improved. Each blower-1
0, the suction nozzle 11 is provided to suck and remove the scattered oil and metal powder, so that the oil and metal powder are prevented from re-adhering to the plate material T, and they are almost completely removed. Can be removed.

In the removing step using a blower 10, the removal of oil and metal powder still remaining on the end face of the strip material is described in Japanese Patent Application No. 5-70576. The metal powder can be more completely removed by scraping.

[0016]

As described above, according to the apparatus for manufacturing an electric resistance welded pipe with an inner groove according to the present invention, the rolling roll 2 and the plurality of forming rolls 3 are formed as the strip material T travels. The oil and metal powder generated at the time of contact with the forming roll group 4, the rolling separator 5, etc. and adhering to the surface of the strip material T are reduced to the rolling roll 2 for groove processing, the forming roll. Group 4, Rolling separator
5 and the like, blow off metal powder together with the oil applied and adhered at the time of processing by a single or a plurality of blowers 10 provided immediately after, etc., and further provide a single or a plurality of suction nozzles 11 in the vicinity of the blower 10; Since the oil and metal powder blown off at -10 are efficiently sucked and removed, it has an excellent effect of preventing welding defects and environmental pollution caused by metal powder.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of an embodiment of an apparatus for manufacturing an electric resistance welded pipe with an inner diameter groove according to the present invention.

FIG. 2 is an enlarged side view showing an embodiment in which a blower 10 and a suction nozzle of the present invention are provided immediately after a rolling roll.

FIG. 3 is a side view of a conventional apparatus for manufacturing an electric resistance welded pipe with an inner diameter groove.

[Explanation of symbols]

 T. Metal sheet strip Metal tube 1. Uncoiler 2. Rolling roll 3. Forming roll Forming roll group 5. Rolling separator 6. Induction coil 7. 7. Squeeze roll Bead cutter 9. Correction roll group 10. Blower 11. Suction nozzle 12. Blower tube 13. Exhaust pipe 14. valve

Continued on the front page (72) Inventor Jun Miyauchi 128-7 Ogimachi, Aizuwakamatsu-shi, Fukushima Prefecture Mitsubishi Shindoh Copper Co., Ltd. Wakamatsu Works (72) Inventor Yoshikatsu Arayama 127-7 Ogimachi, Aizuwakamatsu-shi, Fukushima Mitsubishi Shindo Copper Co., Ltd. Inside the Wakamatsu Plant (56) References Japanese Utility Model 60-11115 (JP, U) Japanese Utility Model 63-71906 (JP, U) Japanese Utility Model 64-6973 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) B21C 37/15 B21C 43/00 B21H 8/00 B21B 1/22 B21D 5/10

Claims (5)

(57) [Claims] 1. A driving means for continuously running a metal strip having a constant width in a longitudinal direction, an engraving means for engraving a large number of grooves on a surface of the running plate by a rolling roll, and a groove. And a forming roll group for gradually rolling the plate material having the grooved shape in the width direction and deforming the plate material into a C-shaped cross section, and a pair of opposite side edges of the plate material formed into a C-shaped cross section. A rolling separator which is inserted into the gap to regulate the amount of the gap, a heating means for heating the strip material downstream of the rolling separator in the direction of travel of the strip material, and a heating means for heating the strip material. Sukuizuro fusing against both side edges of the plate strip material downstream - in the apparatus for manufacturing a conductive sewing tube formed by and a le, before
Serial rolled b - or periphery after Le, blower for removing blowing oils and metal powder adhering to the surface of the plate strip member -
The apparatus for producing electric-resistance-welded pipe with an inside diameter groove, characterized in that provided. 2. A driving means for continuously moving a metal plate material having a constant width in a longitudinal direction, an engraving means for engraving a large number of grooves on a surface of the running plate material by a rolling roll, and a groove. And a gap between the opposite side edges of the sheet material formed into a C-shaped cross section, and a forming roll group for gradually rolling the sheet material having a carved shape in the width direction and deforming the sheet material into a C-shaped cross section. A rolling separator which is inserted and regulates the gap amount, a heating means for heating the strip material downstream of the rolling separator in the direction of travel of the strip material, and a downstream side of the heating means in Sukuizuro fusing against both side edges of the plate strip material - apparatus for manufacturing electric sewing pipe formed by and a le, before
Serial molding b - Le group of at least one of the molding B - inner diameter, characterized in that a - or periphery after Le, blower for removing blowing oils and metal powder adhering to the surface of the plate strip member Manufacturing equipment for grooved ERW pipes. 3. A driving means for continuously moving a metal plate having a constant width in a longitudinal direction, a carving means for carving a number of grooves on a surface of the running plate by a rolling roll, and a groove. And a forming roll group for gradually rolling the plate material having the grooved shape in the width direction and deforming the plate material into a C-shaped cross section, and a pair of opposite side edges of the plate material formed into a C-shaped cross section. A rolling separator which is inserted into the gap to regulate the amount of the gap, a heating means for heating the strip material downstream of the rolling separator in the direction of travel of the strip material, and a heating means for heating the strip material. Sukuizuro fusing against both side edges of the plate strip material downstream - in the apparatus for manufacturing a conductive sewing tube formed by and a le, before
Immediately after or near the rolling roll, on the surface of the strip material
The first stage to remove attached oil and metal powder
A lower member, and at least one component of the forming roll group is provided.
Immediately after or around the shape roll, adhere to the surface of the strip material
-Stage blower for removing blown oil and metal powder
Is provided, and immediately after the rolling separator, or
Are oil and metal powder adhering to the surface of the strip
A third-stage blower for blowing off the gas to remove it . 4. A device for facing at least one of said blowers.
In that position, characterized in that a suction device for sucking the oil and metal powder blown away by the blower according to claim 1
The apparatus for manufacturing an electric resistance welded pipe with an inner diameter groove according to any one of claims 3 to 3 . 5. A box-shaped container surrounding at least one of the blowers and sucking oil and metal powder in the box-shaped container.
The suction device for removing is provided .
3. The apparatus for manufacturing an electric resistance welded pipe with an inner diameter groove according to any one of 3 .