JP2020011333A - Weld bead cutting device - Google Patents

Abstract

To provide a weld bead cutting device, simply structured and downsized, which can reduce work burdens of removing weld bead in a rectangular steel pipe.SOLUTION: A weld bead cutting device 1, which cuts weld bead 51 at a butt-welded part of a rectangular steel pipe 50, comprises a base 10, a cutting blade 20 that is rotationally driven to cut the weld bead 51, rollers 2 and 3 that can move along an inner peripheral surface of the rectangular steel pipe 50, and a clamper 11 that supports the base 10 at one side of the rectangular steel pipe 50. The cutting blade 20, the rollers 2 and 3 and the clamper 11 are mounted on the base 10. With one side of the rectangular steel pipe 50 sandwiched among the clamper 11 and the rollers 2 and 3, the weld bead 51 is cut by the cutting blade 20 while moving the base 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a weld bead cutting device for cutting a weld bead at a butt weld of a rectangular steel pipe.

  BACKGROUND ART In a building, a steel structure using a steel member as a main structure is known. Columns in which rectangular steel pipes are joined to each other are used for the steel structure. FIG. 9 is a perspective view showing a state before joining the rectangular steel pipes 50 to each other. The backing metal 54 is fitted into the lower rectangular steel pipe 50, the backing metal 54 is welded to the lower rectangular steel pipe 50, and the upper rectangular steel pipe 50 is inserted into the extended portion of the backing metal 54, and the upper and lower rectangular steel pipes 50 are inserted. The square steel pipes 50 are connected to each other. FIG. 10 is a cross-sectional view showing a state in which upper and lower rectangular steel pipes 50 are connected to each other. In the state shown in the figure, a plate-like diaphragm 55 is attached to a groove formed by the chamfered portion 53 of the rectangular steel pipe 50. By welding these grooves, the diaphragm 55 is joined to the pillar that joins the rectangular steel pipes 50 to each other.

  On the other hand, the square steel pipe 50 is formed by pressing a steel material and joining the butted portions by welding. Therefore, as shown in FIG. 9, a convex weld bead 51 is formed at the abutting portion of the square steel pipe 50. If the weld bead 51 remains, the backing metal 54 cannot be fitted along the inner peripheral surface of the rectangular steel pipe 50, so that a part of the weld bead 51 has to be removed. Since performing this operation manually requires a great deal of labor, Patent Document 1 proposes a cutting device that automatically removes the weld bead 51.

JP 2008-93758 A

  However, the cutting device described in Patent Literature 1 regulates not only a cutter for cutting a weld bead but also a mounting table for supporting a work (square steel pipe), fixing means for clamping and fixing the work, and an end position of the work in the longitudinal direction. Positioning means, a moving means for moving the cutter in three directions, an inner surface detecting means for detecting an inner peripheral surface of one side of the work near the welding bead portion, and a drive control for driving and controlling the moving means by a detection signal of the inner surface detecting means. However, the equipment was complicated and large-scale, and even if the work of removing the weld bead was omitted by hand, the handling was not easy.

  The present invention is to solve the conventional problems as described above, and to provide a welding bead cutting device that can reduce the work load of removing a welding bead from a rectangular steel pipe while simplifying the structure and reducing the size. With the goal.

  In order to achieve the above object, a welding bead cutting device of the present invention is a welding bead cutting device for cutting a weld bead of a butt weld portion of a square steel pipe, and a base and a rotary drive for cutting the weld bead. A cutting blade, a roller movable along the inner peripheral surface of the square steel pipe, and a clamper that supports the base on one side of the square steel pipe, the cutting blade, the roller and the clamper, The welding bead is cut by the cutting blade while the base is moved while one side of the square steel pipe is sandwiched between the clamper and the roller, being attached to the base. And

  According to this configuration, a cutting blade, a roller, and a clamper are attached to the base, and a structure necessary for bead cutting is integrally formed with the base without excess or shortage, so that the structure is simple, small, and compact. The weight can be reduced. For this reason, portability is facilitated, attachment / detachment work to the square steel pipe is also facilitated, and handling at the time of work is also facilitated, so that the work load is reduced.

  In addition, since the positioning of the cutting blade is completed just by bringing the roller into contact with the inner peripheral surface of the square steel pipe, there is no need to adjust the positioning of the cutting blade when attaching the welding bead cutting device to the square steel pipe. Become. Further, when the rectangular steel pipe is delivered, the bead is usually on the upper side, and the welding bead cutting device according to the present invention can perform work with the bead on the upper side. be able to.

  In the welding bead cutting device of the present invention, it is preferable that a positional relationship between the roller and the cutting blade is adjustable. According to this configuration, it is possible to adjust the cutting depth.

  It is preferable that the position of the roller in the horizontal direction can be adjusted. According to this configuration, when the welding bead cutting device is mounted on a rectangular steel pipe having a small width, it is possible to prevent the roller or its supporting structure from interfering with the inner wall surface of the rectangular steel pipe before cutting the weld bead. The arrangement of the rollers according to the cutting length can be set.

  The effects of the present invention are as described above. In summary, the structure is simple, the size and weight can be reduced, the portability is facilitated, the work for attaching and detaching to and from the square steel pipe is facilitated, and the work is further improved. The work load is reduced because it is easy to handle at the same time, and the adjustment for positioning the cutting blade is not required when the welding bead cutting device is mounted on the square steel pipe. Can be omitted.

The perspective view of the state where the welding bead cutting device concerning one embodiment of the present invention was attached to the square steel pipe. FIG. 2 is an enlarged front view of the welding bead cutting device shown in FIG. 1. The perspective view which looked at the state of FIG. 1 from the back side. The perspective view which looked at the state of Drawing 1 from the side. FIG. 2 is a front view showing before and after work by a welding bead cutting device in one embodiment of the present invention. FIG. 2 is a front view showing before and after cutting of a weld bead in one embodiment of the present invention. In one embodiment of the present invention, a perspective view of a square steel pipe in the state where work by a welding bead cutting device was completed. The front view of the welding bead cutting device concerning one embodiment of the present invention. The perspective view which shows the state before joining of square steel pipes. Sectional drawing of the state which connected upper and lower square steel pipes.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which a weld bead cutting device 1 according to one embodiment of the present invention is mounted on a square steel pipe 50. The rectangular steel pipe 50 is shown with its front side cut away, and the weld bead cutting device 1 is mounted on the back side (end). The square steel pipe 50 is used for a steel structure, and is formed by pressing a steel material and joining a butt portion by welding. A convex weld bead 51 is formed at the butt portion. The welding bead cutting device 1 is a device that removes the welding bead 51 by cutting a portion within a certain range from the end.

  2 is an enlarged front view of the weld bead cutting device 1 shown in FIG. 1, FIG. 3 is a perspective view of the state of FIG. 1 as viewed from the rear side, and FIG. 4 is a view of the state of FIG. It is the perspective view seen. Hereinafter, the structure of the welding bead cutting device 1 will be described with reference to FIGS.

  As shown in FIG. 2, rollers 2 and 3 are attached to the base 10. More specifically, the rollers 2 and 3 are supported via the shafts 6 and 7 on the upright portions 4 and 5 integrated with the base 10. As shown in FIG. 4, rollers 18 and 19 are attached to the base 10, and the rollers 18 and 19 are interposed between the chamfered portion 53 at the end of the rectangular steel pipe 50 and the base 10. I have.

  As shown in FIG. 3, a motor 30 that is a driving source of the cutting blade 20 is attached to the base 10. Reference numeral 32 denotes a power cord. As shown in FIG. 2, the cutting blade 20 is mounted on the rotating shaft 31 of the motor 30. Thus, the cutting blade 20 is attached to the base 10 via the motor 30.

  In FIG. 2, a cutting blade 20 has a cutting tip 22 fixed radially to a substantially circular rotating body 21. The cutting tip 22 rotates integrally with the rotating body 21, and the tip of the cutting tip 22 is a square steel pipe 50. Is cut into a planar shape. As will be described in detail later, when the welding bead cutting device 1 is horizontally moved in a state where the cutting blade 20 is rotated from the state of FIG. 2, the cutting blade 20 also horizontally moves integrally therewith, and the welding is performed by the cutting tip 22. The bead 51 is cut.

  In a state where the welding bead cutting device 1 shown in FIG. 2 is mounted on the square steel pipe 50, one side of the square steel pipe 50 is sandwiched between the rollers 2, 3 and the pressing member 12 provided in the clamper 11, and FIG. As shown in FIG. 4, the welding bead cutting device 1 is mounted on the rectangular steel pipe 50 with the rollers 18 and 19 interposed between the chamfered portion 53 at the end of the rectangular steel pipe 50 and the base 10. In FIG. 2, the pressing force of the pressing member 12 can be adjusted by rotating the bolt 13 of the clamper 11.

  In FIG. 2, since the upper ends of the rollers 2 and 3 and the upper end of the cutting blade 20 are on the same plane, when the rollers 2 and 3 are brought into contact with the inner peripheral surface of the square steel pipe 50 as shown in FIG. The cutting blade 20 is also positioned in contact with the inner peripheral surface of the rectangular steel pipe 50. Further, as described later, even when the positional relationship between the upper ends of the rollers 2 and 3 and the upper end of the cutting blade 20 is changed, when the rollers 2 and 3 are brought into contact with the inner peripheral surface of the rectangular steel pipe 50, The cutting blade 20 is also positioned. That is, the positioning of the cutting blade 20 is completed only by bringing the rollers 2 and 3 into contact with the inner peripheral surface of the rectangular steel pipe 50.

  At the time of the operation by the welding bead cutting device 1, the welding bead cutting device 1 is moved in the horizontal direction (the direction of arrow a) in FIG. In the present embodiment, in addition to the curved end of the pressing member 12, as described above, the rollers 18 and 19 are interposed between the chamfered portion 52 at the end of the rectangular steel pipe 50 and the base 10. (See FIG. 4), the horizontal movement of the weld bead cutting device 1 is facilitated.

  Hereinafter, the operation of the welding bead cutting device 1 will be described with reference to FIGS. 5 and 6. FIG. 5A shows a state in which the welding bead cutting device 1 is mounted on a square steel pipe 50. The state of this figure is the same as that of FIG. 1, and when the welding bead cutting device 1 is mounted, the cutting blade 20 is at a position away from the welding bead 51.

  In this state, the operator activates the motor 30 (see FIG. 3) to rotate the cutting blade 20. Subsequently, the operator moves the welding bead cutting device 1 horizontally while pressing it in the horizontal direction while holding the welding bead cutting device 1 (arrow b direction). During the horizontal movement, the operator only needs to grasp a part of, for example, the clamper 11 or the base 10 of the welding bead cutting device 1. Further, a dedicated handle to be gripped during horizontal movement may be provided in the welding bead cutting device 1.

  During the horizontal movement of the welding bead cutting device 1, the cutting blade 20 rotates while being in contact with the inner peripheral surface of the rectangular steel pipe 50. Therefore, a portion of the inner peripheral surface of the rectangular steel pipe 50 through which the cutting blade 20 passes is cut. FIG. 5B shows a state at the end of the operation by the welding bead cutting device 1. In this state, the weld bead 51 of the square steel pipe 50 shown in FIG.

  The removal of the weld bead 51 will be described more specifically with reference to FIG. FIG. 6A shows a state before the welding bead 51 is removed. The state of this figure is the same state as FIG. 5 (a), and shows a state in which the welding bead cutting device 1 is mounted on the square steel pipe 50. As described above, the weld bead 51 is formed in the square steel pipe 50. However, as shown in FIG. 6A, a bulge portion 52 bulging from a plane portion is also formed near the weld bead 51. .

  Since the cutting tip 22 of the cutting blade 20 has a width (for example, about 2 cm) in the direction of the rotation axis 31 at the tip, the inner peripheral surface of the square steel pipe 50 is cut into a rectangular shape (see FIG. 7). See section A). FIG. 6B shows a state in which the cutting blade 20 has passed through the weld bead 51 and the bulging portion 52. In this state, the weld bead 51 and the bulging portion 52 of the rectangular steel pipe 50 have been cut and removed by the cutting blade 20.

  FIG. 7 is a perspective view of the square steel pipe 50 in a state where the operation by the welding bead cutting device 1 has been completed. The end of the inner peripheral surface of the rectangular steel pipe 50 is cut into a rectangular shape (part A), and the end side of the rectangular steel pipe 50 is removed from the weld bead 51, and a bulged portion 52 near the removed portion (see FIG. a) has also been removed. As a result, the inner peripheral surface on the end side of the rectangular steel pipe 50 is secured in a flat state over the entire circumference, and the backing metal 54 shown in FIG. Can be included.

  The welding bead cutting device 1 according to the present embodiment has a clamp 10, a cutting blade 20, and rollers 2 and 3 attached to a base 10, and a structure necessary for bead cutting is integrally formed with the base 10 without excess or shortage. It has a simple structure and can be reduced in size and weight. For this reason, carrying is easy, the work of attaching and detaching to and from the square steel pipe 50 is easy, and the handling during the work is also easy, so that the work load is reduced.

  Further, as described above, since the positioning of the cutting blade 20 is completed only by bringing the rollers 2 and 3 into contact with the inner peripheral surface of the square steel pipe 50, when the welding bead cutting device 1 is mounted on the square steel pipe 50, Adjustment for positioning the cutting blade 20 is not required.

  Further, when the rectangular steel pipe 50 is delivered, the bead 51 is usually on the upper side as shown in FIG. 1, and in order to remove the bead 5 by hand using a tool such as a grinder, the bead 51 is placed on the lower side. As described above, the welding bead cutting device 1 can perform the operation with the bead 51 on the upper side as described above, so that the inversion operation of the rectangular steel pipe 50 is omitted. be able to.

  Hereinafter, the adjustment mechanism of the welding bead cutting device 1 will be described mainly with reference to FIG. FIG. 8 shows a front view of the welding bead cutting device 1. As described above, when the welding bead cutting device 1 is mounted on the rectangular steel pipe 50, the rollers 2, 3 abut on the rectangular steel pipe, and the cutting blade 20 is positioned. In the present embodiment, by adjusting the positional relationship between the base 10 and the motor 30, the positional relationship between the rollers 2, 3 and the cutting blade 20 can be adjusted.

  The motor base 33 shown in FIG. 3 is fixed to the base 10 by the bolts 26, 27 and 28 shown in FIG. 8, and the motor 30 integrated with the motor base 33 is connected to the base 10 as shown in FIG. It is attached to the back side. 8, the bolt 27 is inserted through the elongated hole 16, and the bolt 28 is inserted through the elongated hole 17. Therefore, when the tightening positions of the bolts 27 and 28 in the elongated holes 16 and 17 are changed, the fixing position of the motor base 33 to the base 10 changes starting from the bolt 26, and at the same time, the base of the cutting blade 20 integrated with the motor 30. The mounting position with respect to the table 10 will change.

  When the attachment position of the cutting blade 20 to the base 10 changes, the positional relationship between the cutting blade 20 and the rollers 2 and 3 also changes, and the positioning position of the cutting blade 20 when the welding bead cutting device 1 is mounted on the square steel pipe 50 also changes. Instead, the positioning position of the cutting blade 20 can be adjusted. This adjustment makes it possible to adjust the cutting depth. Specifically, if it is desired to cut deeper after the first cutting, the upper end of the cutting blade 20 is adjusted to be higher than the upper ends of the rollers 2 and 3. Can be further deeply cut.

  Further, in the present embodiment, the interval between the rollers 2 and 3 can be adjusted. In FIG. 5B showing a state at the end of the operation by the welding bead cutting device 1, in the horizontal direction, a sufficient distance is provided between the upright portion 4 supporting the roller 2 and the left inner wall surface of the rectangular steel pipe 50. Spacing is maintained. On the other hand, if the rectangular steel pipe 50 has a small horizontal width, the standing portion 4 and the inner wall surface on the left side of the rectangular steel pipe 50 interfere with each other before cutting the weld bead 51 with the cutting blade 20, and the work is interrupted. .

  In the present embodiment, the position of the rollers 2 in the horizontal direction can be adjusted so that the welding bead 51 can be cut even with a rectangular steel pipe 50 having a small width. Specifically, in FIG. 8, the standing portion 4 supporting the roller 2 has extending portions 14 and 15, and bolts 23, 24, and 25 passing through these portions are tightened to the base 10. , The standing portion 4 is attached to the base 10.

  On the other hand, the base 10 is provided with holes 34, 35, 36, 37 and the like in the horizontal direction so that the holes for tightening the bolts 23, 24, 25 can be changed. The distance between the rollers 2 and 3 can be adjusted by adjusting the attachment position. When the weld bead cutting device 1 is mounted on the rectangular steel pipe 50 having a small width, if the upright portion 4 is attached to the roller 3 side, the upright portion 4 is cut before the cutting blade 20 cuts the weld bead 51. And the inner wall surface on the left side of the square steel pipe 50 can be prevented from interfering with each other. Further, since the interval between the rollers 2 and 3 is adjustable, the interval between the rollers 2 and 3 can be set according to the cutting length of the weld bead 51 and the bulging portion 52 (see FIG. 6A). .

  Further, in this embodiment, the mounting position of the clamper 11 can be adjusted so that the welding bead cutting device 1 can be stably installed on the square steel pipe 50. In FIG. 3, the clampers 11 are attached to the base 10 by tightening the bolts 40 and 41 through which the clampers 11 are inserted, to the base 10. The base 10 is provided with holes 42, 43 and the like in the horizontal direction so that the holes through which the bolts 40, 41 are inserted can be changed, so that the mounting position of the clamper 11 in the horizontal direction can be adjusted. Has become.

  The embodiments of the present invention have been described above. However, these are merely examples, and the present invention is not limited to the above-described embodiments. The support structure of the clamper 11, the rollers 2, 3, the mounting structure of the motor 20, the structure of the cutting blade 20, the cutting The adjusting mechanism of the blade 20, the adjusting mechanism of the roller 2, the adjusting mechanism of the clamper 11, and the like may have other structures as long as the same effects and functions are realized.

  Further, the embodiment may be changed or added as appropriate. For example, the number of rollers 2 and 3 may be increased, a screw mechanism may be added, a screw may be turned with a hand-operated handle, and the apparatus may be horizontally moved. It may be.

DESCRIPTION OF SYMBOLS 1 Welding bead cutting device 2, 3 Roller 10 Base 11 Clamper 12 Pressing member 20 Cutting blade 22 Cutting tip 30 Motor 33 Motor base 50 Square steel pipe 51 Weld bead

Claims (3)

A weld bead cutting device for cutting a weld bead at a butt weld of a square steel pipe,
A base,
A cutting blade that is driven to rotate and cuts the welding bead,
A roller movable along the inner peripheral surface of the rectangular steel pipe,
A clamper supporting the base on one side of the square steel pipe,
The cutting blade, the roller and the clamper are attached to the base,
A welding bead cutting apparatus, wherein the welding bead is cut by the cutting blade while moving the base while one side of the rectangular steel pipe is sandwiched between the clamper and the roller.   The welding bead cutting device according to claim 1, wherein a positional relationship between the roller and the cutting blade is adjustable. The welding bead cutting device according to claim 1, wherein a horizontal arrangement position of the roller is adjustable.

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