JP6934266B2 - Welding bead cutting equipment - Google Patents

Description

The present invention relates to a weld bead cutting device that cuts a weld bead at a butt weld portion of a square steel pipe.

In buildings, a steel structure using a steel member as a main structure is known. For the steel structure, columns made by joining square steel pipes are used. FIG. 13 is a perspective view showing a state before joining the square steel pipes 50 to each other. The backing metal 54 is fitted into the lower square steel pipe 50, the backing metal 54 is welded to the lower square steel pipe 50, and the upper square steel pipe 50 is inserted into the extending portion of the backing metal 54 to form the upper and lower square steel pipes. The square steel pipes 50 are connected to each other. FIG. 14 shows a cross-sectional view of the upper and lower square steel pipes 50 connected to each other. The state of this figure, plate-like diaphragm 55 is mounted in a groove formed in the chamfered portion 53 of the square tube 50. By welding this groove, the diaphragm 55 is joined to the column in which the square steel pipes 50 are joined to each other.

On the other hand, the square steel pipe 50 is formed by press-forming a steel material and joining the butt portions by welding. Therefore, as shown in FIG. 13 , a convex weld bead 51 is formed at the butt 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 square steel pipe 50, so that a part of the weld bead 51 needs to be removed. Since it takes a lot of labor to perform this work manually, Patent Document 1 has proposed a cutting device that automatically removes the weld bead 51.

Japanese Unexamined Patent Publication No. 2008-93758

However, the cutting device described in Patent Document 1 regulates, in addition to a cutter for cutting a weld bead, a mounting table for supporting a work (square steel pipe), a fixing means for clamping and fixing the work, and a position of an end portion in the work in the longitudinal direction. Positioning means, moving means for moving the cutter in three directions, inner surface detecting means for detecting the inner peripheral surface of one side of the work close to the weld bead portion, and drive control for driving and controlling the moving means by detection signals of the inner surface detecting means. are those with the means, device is a complicated and large-scale, was not easy to handle even eliminates the removal work of the weld bead that by the hand.

The present invention solves the above-mentioned conventional problems, and provides a welding bead cutting apparatus capable of reducing the work load of removing welding beads of a square steel pipe while achieving a simple structure and miniaturization. With the goal.

In order to achieve the above object, the weld bead cutting device of the present invention is a weld bead cutting device for cutting a weld bead of a butt welded portion of a square steel pipe, and includes a fixture for fixing the substrate to the square steel pipe and a fixture. It includes a cutting blade that is rotationally driven to cut the weld bead, and a moving body that is attached to the substrate and can move in the side direction of the square steel pipe, and the cutting blade moves integrally with the moving body. It is characterized in that the welding bead is cut by the cutting blade while moving the moving body in a state where the substrate is fixed to the square steel pipe by the fixture.

Since the main part of the weld bead cutting device of the present invention is composed of a moving body to which accessories such as a substrate and a cutting blade are attached, a large-scale device or a complicated device is not required, and the structure is simple. It is possible to reduce the size and weight. For this reason, it becomes easy to carry, the work of attaching / detaching to / from the square steel pipe becomes easy, and the handling at the time of work becomes easy, so that the work load is reduced.

Further, even if the square steel pipe is deformed, by fixing the base with the fixture on the flat surface of the square steel pipe, the horizontality of the base and the moving body integrated with the base can be maintained, so that the base can be integrated with the moving body. The cutting blade moves horizontally and the cutting surface becomes a horizontal plane. Therefore, the inner peripheral surface of the square steel pipe is cut without excess or deficiency by the cutting blade, and it is possible to prevent over-cutting and uncut portion. Further, in a square steel pipe, the weld bead is usually on the upper surface side or the side surface side at the time of delivery, and in the welding bead cutting apparatus according to the present invention, the weld bead is on either the upper surface side or the side surface side at the time of delivery. Since the work can be performed in the state at the time of delivery, the work such as reversing the square steel pipe can be omitted.

The welding bead cutting apparatus of the present invention preferably has the following configurations. A screw shaft is rotatably fixed to the moving body, a nut screwing with the screw shaft is fixed to the base, and the rotation of the screw shaft causes the moving body to move in the side direction of the square steel pipe. It is preferably movable. According to this configuration, a moving mechanism of a moving body can be realized with a simple structure.

A rotating body that rotates integrally with the rotation of the substrate and the moving body around the rotation axis of the cutting blade, and a support that rotatably supports the rotating body are further provided, and the support is fixed. It is preferable that the substrate and the moving body can rotate and move between the horizontal state and the vertical state by rotating the rotating body in the state. According to this configuration, the main body of the device including the substrate and the moving body can be easily rotated and moved between the horizontal state and the vertical state, and the weld bead is on either the upper surface side or the side surface side at the time of delivery. However, the welding bead cutting device can be easily attached to the square steel pipe.

It is preferable that the cutting blade is fixed to a position adjusting body movably attached to the moving body, and the position of the cutting blade can be adjusted by moving the position adjusting body. According to this configuration, the welding bead cutting device can be easily attached to and detached from the square steel pipe, and the degree of freedom in the setting position of the cutting blade is increased, so that more accurate cutting becomes possible.

It is preferable that the arrangement position of the fixture on the substrate can be adjusted so that the fixation position of the fixture in the side direction of the square steel pipe can be adjusted. According to this configuration, the fixing position of the fixture can be adjusted according to the length of the side of the square steel pipe.

The effects of the present invention are as described above, and in summary, the structure is simple, the size and weight can be reduced, the portability is easy, the work of attaching and detaching to the square steel pipe is easy, and the work is further carried out. Since it is easy to handle at the time, the work load is reduced, and even if the square steel pipe is deformed, the cutting surface becomes a horizontal surface and the inner peripheral surface of the square steel pipe is cut without excess or deficiency by the cutting blade, resulting in over-cutting or shaving. It is possible to prevent the residue, and at the same time, it is possible to omit the work such as reversing the square steel pipe.

The perspective view of the state in which the welding bead cutting apparatus which concerns on one Embodiment of this invention is attached to a square steel pipe. An enlarged front view of the welding bead cutting apparatus shown in FIG. The external perspective view of the welding bead cutting apparatus shown in FIG. The side view of the welding bead cutting apparatus shown in FIG. In one embodiment of the present invention, a front view showing before and after work by a welding bead cutting device. In one embodiment of the present invention, a cross-sectional view of a square steel pipe in a state before removal of the weld bead. In one embodiment of the present invention, a cross-sectional view of a square steel pipe in a state after the weld bead is removed. In one embodiment of the present invention, a perspective view of a square steel pipe in a state after the weld bead is removed. The main part block diagram which shows the height adjustment mechanism of the cutting blade which concerns on one Embodiment of this invention. FIG. 6 is a configuration diagram of a main part showing an adjusting mechanism of a clamper in one embodiment of the present invention. The front view which shows the rotation mechanism of the welding bead cutting apparatus which concerns on one Embodiment of this invention. The back view which shows the rotation mechanism of the welding bead cutting apparatus which concerns on one Embodiment of this invention. The perspective view which shows the state before joining the square steel pipes. Cross-sectional view of the upper and lower square steel pipes connected to each other.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a perspective view of a state in which the welding bead cutting device 1 according to the embodiment of the present invention is mounted on a square steel pipe 50. The square steel pipe 50 is shown with the front side cut off, and the weld bead cutting device 1 is mounted on the back side (end). The square steel pipe 50 is used for a steel frame structure, is a steel material press-formed, and the butt portions are joined by welding, and a convex weld bead 51 is formed in the butt portion. The welding bead cutting device 1 is a device that cuts and removes a portion of the welding bead 51 from the end portion in a certain range. When mounting the welding bead cutting device 1 on the square steel pipe 50 as shown in FIG. 1, since it is necessary to lift the entire welding bead cutting device 1 to the vicinity of the upper side of the square steel pipe 50, the welding bead cutting device 1 is supported by a lift. Or it may be hung on a crane.

FIG. 2 is an enlarged front view of the welding bead cutting device 1 shown in FIG. 1, FIG. 3 is an external perspective view, and FIG. 4 is a side view. Hereinafter, the structure of the welding bead cutting apparatus 1 will be described with reference to FIGS. 2 to 4. In FIG. 2, the welding bead cutting device 1 is mounted on the welding bead cutting device 1 with a pair of left and right clampers 2 serving as fixing means sandwiching one side of the square steel pipe 50. The clamper 2 is an example of a fixture, and the fixture may be any one that can fix the welding bead cutting device 1 to the square steel pipe 50, and is limited to a clamper 2 having a structure that sandwiches one side of the square steel pipe 50. Instead, for example, it may be a magnet.

The clamper 2 includes a steel pipe support 3, a screw shaft 5, a pressing body 4 fixed to one end of the screw shaft 5, a handle 8 fixed to the other end of the screw shaft 5, a nut 7 screwed to the screw shaft 5, and a nut. A clamper support 6 to which the 7 is fixed is provided. By turning the handle 8, the pressing body 4 can be linearly moved, and one side of the square steel pipe 50 can be sandwiched between the pressing body 4 and the steel pipe support 3.

In FIG. 2, the clamper 2 is fixed to the substrate 10. The substrate 10 is composed of a horizontal frame 11 and a vertical frame 12 integrated with the horizontal frame 11. The clamper support 6 is fixed to the horizontal frame 11, and the steel pipe support 3 is fixed to the vertical frame 12. When the clamper 2 sandwiches one side of the square steel pipe 50, the substrate 10 is fixed to the square steel pipe 50 via the clamper 2. Since the clamper 2 is maintained in a fixed state and does not move during the cutting operation, the substrate 10 integrated with the clamper 2 does not move and is maintained in a fixed position.

In FIG. 3, a moving body 20 is attached to the vertical frame 12 via a guide rail mechanism. The guide 14 is fixed to the vertical frame 12, and the rail 15 is fixed to the moving body 20. The rail 15 extends in the longitudinal direction of the moving body 20. As shown in the C portion, the guide 14 and the rail 15 are engaged with each other, and the rail 15 is guided by the guide 14 to move, so that the moving body 20 moves linearly with the rail 15. Can be done. Brackets 21 are fixed to both ends of the moving body 20, bearings 22 are fixed to each bracket 21, and both ends of the screw shaft 23 are supported by bearings 22.

In FIG. 3, the cutting blade 30 is attached to the rotating shaft (not shown) of the motor 26 in the bearing holder 25. The cutting blade 30 is one in which the cutting tip 32 is radially fixed to the cutting blade main body 31. By driving the motor 26, the cutting blade 30 rotates integrally with the rotating shaft of the motor 26, and the tip of the cutting tip 32 cuts the surface of the square steel pipe 50 into a flat surface.

In FIG. 4, the motor 26 is fixed to the motor support 27, and the motor support 27 is fixed to the position adjusting body 28. The position adjusting body 28 is attached to the moving body 20. According to these configurations, the motor 26 moves at the same time as the moving body 20 moves, and the cutting blade 30 attached to the rotating shaft of the motor 26 also moves integrally with the motor 26.

In FIG. 2, the nut 17 is fixed to the nut support plate 16. The nut support plate 16 is fixed to the horizontal frame 11. As described above, since the base 10 does not move during the cutting operation, the horizontal frame 11 constituting the base 10 does not move, and the nut 17 fixed to the horizontal frame 11 via the nut support plate 16 also maintains a fixed position. ..

In this configuration, when the handle 24 is turned, the screw shaft 23 screwed to the nut 17 rotates, but the left and right bearings 22 and the screw shaft 23 are not screwed, and the screw shaft 23 is attached to the bearing inside the bearing 22. Has been done. Therefore, even if the screw shaft 23 rotates, the positional relationship between the screw shaft 23 and the bearing 22 does not change. On the other hand, the rotation of the screw shaft 23 changes the protrusion of the screw shaft 23 from the nut 17. When the handle 24 is turned and the allowance A becomes longer, the allowance B becomes shorter. That is, the screw shaft 23 moves in the axial direction with respect to the nut 17 at the fixed position, the bearing 22 and the bracket 21 move at the same time, and the moving body 20 moves integrally with the bearing 22 and the bracket 21.

When the moving body 20 is moved horizontally (in the X direction) while the cutting blade 30 is rotated from the state shown in FIG. 2, the cutting blade 30 also moves horizontally integrally with the moving body 20, and the tip of the cutting tip 32 is a square steel pipe 50. The surface is cut into a flat surface, and the welding bead 51 is cut. Hereinafter, the operation by the welding bead cutting device 1 will be described with reference to FIGS. 5 to 7. FIG. 5A shows a state in which the welding bead cutting device 1 is attached to the square steel pipe 50. In the mounted state of the welding bead cutting device 1 shown in this figure, the cutting blade 30 is located at a position away from the welding bead 51.

The operator first attaches the weld bead cutting device 1 to the square steel pipe 50 as shown in FIG. 5 (a). For this mounting, a clamper 2 is used, and one side of the square steel pipe 50 is tightened by the clamper 2 by turning the handle 8 with one side of the square steel pipe 50 sandwiched between the pressing body 4 and the steel pipe support 3. .. In this state, the operator activates the motor 26 (see FIG. 4) with the controller (not shown) to rotate the cutting blade 30. Subsequently, as will be described in detail later, the height of the cutting blade 30 is adjusted by operating the lever 42 (see FIG. 4).

Next, in FIG. 5A, the operator rotates the handle 24 in a predetermined direction. As a result, the moving body 20 moves horizontally, and the cutting blade 30 also moves horizontally (in the X direction) integrally with the moving body 20. During the horizontal movement of the moving body 20, the cutting blade 20 rotates in contact with the inner peripheral surface of the square steel pipe 50. Therefore, in the inner peripheral surface of the square steel pipe 50, the passing portion of the cutting blade 20 is cut. FIG. 5B shows a state at the end of work by the welding bead cutting device 1. In this state, the weld bead 51 of the square steel pipe 50 shown in FIG. 5A is removed by being cut by the cutting blade 30 by the width of the cutting tip 32 of the cutting blade 30.

The removal of the weld bead 51 will be described more specifically with reference to FIGS. 6 and 7. FIG. 6 shows the state of the weld bead 51 before removal. State of the figure is the same state as FIG. 5 (a), shows the mounting state of the RHS 50 of the weld bead cutting machine 1. As described above, the square steel pipe 50 is formed by press-forming a steel material and joining the butt portions by welding, and a convex weld bead 51 is formed at the butt portion of the square steel pipe 50. Further, of one side of the square steel pipe 50 in which the weld bead 51 is formed, a curved portion 56 may be formed on the inner peripheral surface near the central portion. Further, a bulging portion 57 bulging from the curved portion 56 is formed in the vicinity of the weld bead 51. Further, the side on which the welding bead 51 is formed may be convex or concave.

On the other hand, in many cases, a flat surface portion 58 is left in the vicinity of both ends of one side of the curved portion 56 and the square steel pipe 50 in which the curved portion 56 is formed. Since the pressing bodies 4 of the pair of clampers 2 are placed on the flat surface portion 58, the horizontality of the base 10 integrated with the clamper 2 and the moving body 20 integrated with the base 10 is maintained in FIG. 5A. Is done.

In FIG. 3, in the cutting tip 32 of the cutting blade 30, since the cutting edge portion of the tip has a width (for example, about 2 cm) in the rotation axis direction of the cutting blade 30, the rotating cutting blade 30 is in the state of FIG. When horizontally moved from (X direction), the inner peripheral surface of the square steel pipe 50 is cut into a rectangular shape (see part D in FIG. 8). Further, as described above, the moving body 20 is maintained in a horizontal state, and the cutting blade 30 moves horizontally integrally with the moving body 20, so that the cutting surface becomes a horizontal plane.

FIG. 7 shows a state in which the horizontal movement of the cutting blade 30 is completed. In this state, since the square steel pipe 50 is cut so that the curved portion 56 is a horizontal plane, the weld bead 51 and the bulging portion 57 are also cut and removed.

FIG. 8 shows a perspective view of the square steel pipe 50 in a state where the work by the welding bead cutting device 1 is completed. Since the end of the inner peripheral surface of the square steel pipe 50 is cut into a rectangular shape (D part), the end side of the square steel pipe 50 is removed from the weld bead 51, and this removed portion is a horizontal plane as described above. The inner peripheral surface on the end side of the square steel pipe 50 is ensured to be flat over the entire circumference, and the backing metal 54 shown in FIG. 13 can be comfortably fitted along the inner peripheral surface of the square steel pipe 50. It becomes.

The welding bead cutting device 1 according to the present embodiment does not require a large-scale device or a complicated device because the main part is composed of the moving body 20 to which the base 10 and the accessory parts such as the cutting blade 30 are attached. , The structure is simple, and it is possible to reduce the size and weight. Therefore, it becomes easy to carry, the work of attaching / detaching to / from the square steel pipe 50 becomes easy, and the handling at the time of work becomes easy, so that the work load is reduced.

Further, as described above, even if the square steel pipe 50 is deformed, the moving body 20 to which the cutting blade 30 is attached is maintained in a horizontal state, so that the cutting blade 30 moves horizontally together with the moving body 20 and cuts. The surface becomes a horizontal plane. Therefore, the inner peripheral surface of the square steel pipe 50 is cut without excess or deficiency by the cutting blade 30, and it is possible to prevent over-cutting and uncut portion.

Further, at the time of delivery, the square steel pipe 50 usually has the bead 51 on the upper surface side side or the side surface side side as shown in FIG. 1, and the bead 51 is manually attached using a tool such as a grinder. In order to remove it, it was necessary to change the delivery state of the square steel pipe 50 by inverting the square steel pipe 50 so that the bead 51 is on the lower side. Since the work can be performed with the bead 51 on the side on the upper surface side, and similarly, the work can be performed with the bead 51 on the side on the side surface side, the work such as reversing the square steel pipe 50 can be omitted. ..

Hereinafter, the adjusting mechanism of the welding bead cutting device 1 will be described. FIG. 9 is a configuration diagram of a main part showing a position adjusting mechanism of the cutting blade 30. When mounting the welding bead cutting device 1 on the square steel pipe 50, if the position of the cutting blade 30 is adjusted so as not to come into contact with the square steel pipe 50 by the position adjusting mechanism, the mounting work becomes easy. According to the position adjusting mechanism according to the present embodiment, after the welding bead cutting device 1 is mounted with the square steel pipe 50, the position of the cutting blade 30 can be adjusted by operating the lever 42 without changing the mounted state. Therefore, the position of the cutting blade 30 can be easily adjusted.

In FIG. 9, the position adjusting body 28 is a plate-shaped member attached to the back surface side of the moving body 20 (see FIG. 4). The position adjusting body 28 is attached to the moving body 20 by a shaft 34, and a pin 35 fixed to the moving body 20 side is engaged with the elongated hole 36, and a pin 37 fixed to the moving body 20 side to the elongated hole 38. Are engaged. In this configuration, the position adjusting body 28 can rotate about the center of the shaft 34 as the center of rotation, and during rotation, the elongated holes 36 and the elongated holes 38 are formed along the pins 36 and 37, respectively, within these forming ranges. Moving.

In FIG. 9, the motor support 27 (see FIG. 4) is fixed to the position adjusting body 28 by the screw 48. As a result, the motor 26 (see FIG. 4) and its accessory parts are attached to the position adjusting body 28, and when the position adjusting body 28 moves, the cutting blade 30 also moves integrally with the motor 26 (see FIG. 4).

In FIG. 9, the shaft fixing block 47 is fixed to the position adjusting body 28, and the shaft 46 is fixed to the shaft fixing block 47. In FIG. 4, the cam support 29 is formed integrally with the moving body 20, and the cam base 45 is mounted on the cam support 29. The shaft 46 inserts the cam support 29 and the cam base 45, and is supported by the cam 43 by the shaft 44 on the distal end side.

In FIG. 9, the lever 42 is integrated with the cam 43, and the cam 43 is eccentrically attached to the shaft 44. Therefore, when the lever 42 is rotated, the distance between the shaft 44 and the cam base 45 changes, so that the shaft 46 moves up and down, and together with this, the shaft fixing block 47 and the position adjusting body fixed to the shaft fixing block 47 and the position adjusting body fixed thereto. 28 goes up and down.

FIG. 9 shows a state in which the position adjusting body 28 is fully raised, and the lower ends of the elongated hole 36 and the elongated hole 38 are in contact with the lower ends of the pin 35 and the pin 37, respectively. When the lever 42 is turned in the rising direction from the state shown in FIG. 9 (arrow a), the distance between the shaft 44 and the cam base 45 becomes shorter, and the shaft 46 is pushed down accordingly, and the shaft fixing block 47 is integrated with this. And the position adjusting body 28 fixed to this is lowered. In this lowered state, the weld bead cutting device 1 may be removed from the square steel pipe 50, and this lowered state may be maintained until the weld bead cutting device 1 is attached to the new square steel pipe 50.

Next, the position adjusting mechanism of the clamper 2 will be described with reference to FIG. FIG. 10 is a plan view showing a main part in the vicinity of the clamper 2. The clamper support 6 is fixed to the horizontal frame 11 constituting the base 10 by screws 61 and 62. The screw 62 can be rotated by operating the lever 40. If the screw 61 is tightened to the extent of temporary fixing in advance, the shaft portion of the screw 61 and 62 can be moved along the groove 60 formed in the horizontal frame 11 by loosening the screw 62 with the lever 40. The clamper support 6, the steel pipe support 3 integrated with the clamper support 6 and the vertical frame 12 (see FIG. 2) also move integrally with the movement, and the entire clamper 2 moves in the lateral direction (longitudinal direction of the horizontal frame 11). This makes it possible to adjust the fixed position of the clamper 2 according to the length of the side of the square steel pipe 50.

FIG. 11 is a front view showing the rotation mechanism of the welding bead cutting device 1, and FIG. 12 is a back view. The configurations of FIGS. 11 and 12 are the same as those of the above-described embodiment in the basic configuration of the welding bead cutting device 1, but the device main body 70 of the welding bead cutting device 1 is attached to the support 65 via the rotating body 9. The point is different. In each of FIGS. 11 and 12, the apparatus main body 70 including the base 10 and the moving body 20 is shown simplified by a two-dot chain line.

As shown in FIG. 4, the rotating body 9 is integrated with the motor support 27. As described above, the accessory parts of the motor 26 including the motor 26 and the motor support 27 are integrated with the position adjusting body 28, the position adjusting body 28 is attached to the moving body 20, and the moving body 20 is the base 10. It is attached to. Therefore, when the rotating body 9 rotates around the rotation axis of the cutting blade 30 in a state where the welding bead cutting device 1 is not attached to the square steel pipe 50, the device main body 70 rotates integrally with the rotating body 9. Therefore, if the support 65 is attached to a base 71 or the like installed on the ground, the apparatus main body 70 can be easily rotated and moved between the horizontal state and the vertical state. As a result, in FIG. 1, the weld bead 51 is formed on the upper surface side of the square steel pipe 50, but even if it is formed on the side surface, the weld bead cutting device 1 can be attached to the square steel pipe 50. Easy to install.

More specifically, on the front side of FIG. 11, the rotating body 9 is slidably supported by a roller 66 fixed to the support 65. Further, the rollers 67 and the rollers 68 fixed to the support 65 are slidably in contact with the rotating body 9, and similarly, the rollers 67 and the rollers 68 and the rotating body 9 slide on the back surface side of FIG. The rotating body 9 is sandwiched between the rollers 67 and 68 on the front side and the rollers 67 and 68 on the back side. The knob 63 is integrated with the pin 64, and the rotation of the rotating body 9 is restricted by inserting the pin 64 into the hole 69.

In this configuration, when the weld bead 51 is formed on the side surface of the square steel pipe 50, the handle 24 (with the operator pulling the knob 63 from the state of FIG. 11 in the horizontal state of the apparatus main body 70) When a force is applied to rotate the apparatus main body 70 by grasping (see FIG. 3) or the like, the rotating body 9 rotates while sliding with the rollers 66 to 68, and the apparatus main body 70 rotates integrally with the rotating body 9. As a result, the apparatus main body 70 can be brought into a vertical state, and the welding bead 51 formed on the side surface side of the square steel pipe 50 can be cut. In the present embodiment, the rotating body 9 is a dedicated disk-shaped member, but the shape is not particularly limited, and the rotating body 9 may be shared with, for example, the motor support 27 without providing the dedicated member.

Although one embodiment of the present invention has been described above, these are examples and are not limited to the above-described embodiment, but are the structure of the base 10, the engagement structure between the base 10 and the moving body 20, the structure of the clamper 2, and cutting. The structure of the blade 30, the position adjusting mechanism of the cutting blade 30, the position adjusting mechanism of the clamper 2, and the like may have other structures as long as they realize the same effect and function, and the position adjusting of the cutting blade 30 may be performed. The mechanism and the position adjusting mechanism of the clamper 2 may be omitted.

Further, in the above embodiment, a mechanism for moving the moving body 20 is used by using the screw shaft 23, but this mechanism is omitted, and the operator grasps a part of the moving body 20 to move the moving body 20 horizontally. It may be moved, or the screw shaft 23 may be driven by a motor instead of manually.

1 Welding bead cutting device 2 Clamper (fixing tool)
9 Rotating body 10 Base 14 Guide 15 Rail 17 Nut 20 Moving body 23 Screw shaft 26 Motor 28 Positioning body 30 Cutting blade 50 Square steel pipe 51 Welding bead 65 Support

Claims (5)

A weld bead cutting device that cuts the weld bead of a butt weld formed on the inner peripheral surface of a square steel pipe.
With the base
Fixtures for fixing the substrate to the square steel pipe,
A cutting blade that is rotationally driven to cut the weld bead,
It is provided with a moving body attached to the substrate and movable in the side direction of the side on which the weld bead of the square steel pipe is formed.
The cutting blade moves integrally with the moving body and
The substrate is fixed to the square steel pipe with the fixture, and the moving body is placed on the side of the moving body in a state where the cutting blade is in contact with the end of the inner peripheral surface of the square steel pipe and is located away from the welding bead. While moving in the direction, the cutting blade is moved in the direction across the welding bead, the inner peripheral surface of the square steel pipe is cut by the cutting blade, and the end side of the square steel pipe of the welding bead is cut. A welding bead cutting device characterized by cutting. A screw shaft is rotatably fixed to the moving body, a nut to be screwed to the screw shaft is fixed to the base, and the rotation of the screw shaft causes the moving body to move in the side direction of the square steel pipe. The weld bead cutting apparatus according to claim 1, which is movable to. A rotating body that rotates integrally with the rotation of the substrate and the moving body around the rotation axis of the cutting blade, and a support that rotatably supports the rotating body are further provided, and the support is fixed. The welding bead cutting apparatus according to claim 1, wherein the substrate and the moving body can rotate and move between a horizontal state and a vertical state by rotating the rotating body in the state. The welding bead according to claim 1, wherein the cutting blade is fixed to a position adjusting body movably attached to the moving body, and the position of the cutting blade can be adjusted by moving the position adjusting body. Cutting equipment. The welding bead cutting apparatus according to claim 1, wherein the arrangement position of the fixture on the substrate is adjustable so that the fixation position of the fixture in the side direction of the square steel pipe can be adjusted.

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