JP2022103837A - Weld bead cutting apparatus - Google Patents

Abstract

To reduce labor for positional adjustment of a cutter, in a weld bead cutting apparatus for cutting a weld bead of a rectangular steel tube.SOLUTION: A weld bead cutting apparatus includes: a cutter 2 for cutting a weld bead 8 of an inside surface 7a of a column material 7; a motor 6 for rotatively driving the cutter 2; cutter feeding means for moving the cutter 2 in a sliding manner along the weld bead 8; and fixing means for fixing the weld bead cutting apparatus 1 to the column material 7. The fixing means is provided with an L-shaped reference plate 3. A bottom surface 2b of the cutter 2 is arranged in a predetermined reference plane P.SELECTED DRAWING: Figure 1

Description

The present invention relates to a weld bead cutting device that cuts a weld bead on the inner surface of a square steel pipe.

Conventionally, the invention of a weld bead cutting device for cutting a weld bead formed in a butt weld portion of a square steel pipe is known. For example, Patent Document 1 includes a roller that supports a base on one side of a square steel pipe and can move along the inner peripheral surface of the square steel pipe, and cuts a weld bead while moving the base. The invention of is disclosed.

Japanese Unexamined Patent Publication No. 2020-11333

By the way, the square steel pipe is used as a building material (pillar) by joining a plurality of square steel pipes in the longitudinal direction. Specifically, the square steel pipes are temporarily assembled and assembled using an iron plate (diaphragm) as a joint, and the joints between the square steel pipes are robot-welded to form a column. At this time, by appropriately cutting the weld bead of the square steel pipe, the backing metal can be brought into close contact with the inner surface of the square steel pipe without a gap, and the column joint can be prevented from coming off (drilling).

However, according to the conventional weld bead cutting device, there is a problem that it is difficult to adjust the position of the cutter for appropriately cutting the weld bead, and it takes time and effort to cut. Specifically, as shown in FIG. 6, the butt welded portion of the square steel pipe is convex (FIG. 6 (a)) and concave (FIG. 7 (FIG. 7)) toward the inner side surface 7a of the square steel pipe due to heat during welding. b)) is distorted to form a distorted uneven surface 7c. Therefore, if the position of the cutter is not properly adjusted for each square steel pipe, in the case of FIG. 6A, the base metal is cut during the welding bead cutting, which causes a problem of plate thickness loss in the square steel pipe. On the other hand, in the case of FIG. 6B, the cutting of the weld bead becomes shallow, and it becomes necessary to rework it later. In particular, when processing a plurality of square steel pipes, it is necessary to attach and detach the weld bead cutting device many times, so that this problem becomes remarkable.

Therefore, an object of the present invention is to provide a welding bead cutting device that can reduce the trouble of adjusting the position of the cutter.

In order to solve the above problems, the weld bead cutting device of the present invention is a weld bead cutting device that cuts a weld bead formed on a steel material surface, and is a cutter that cuts the weld bead and a motor that drives the cutter to rotate. A cutter feeding means for sliding the cutter along the weld bead and a fixing means for fixing the weld bead cutting device to the steel material, the fixing means including a reference plate for arranging the cutter on a predetermined reference surface. It is characterized by that.

Further, a pair of reference plates formed in a substantially L shape is provided, and the reference plates include a support surface for supporting the weld bead cutting device and a leg portion for lifting the cutter from the steel material surface, and the pair of leg portions includes a pair of reference plates. , Arranged so as to face each other via the weld bead near the edge of the weld bead.

According to the weld bead cutting device of the present invention, since the reference plate is provided and the cutter is arranged so as to be arranged in a predetermined reference plane, the position of the cutter with respect to the weld bead can be easily adjusted and the labor during work is reduced. It has the effect of being able to do it.

It is a front view of the welding bead cutting apparatus which shows one Embodiment of this invention. It is a right side view of the welding bead cutting apparatus of FIG. It is a perspective view of a reference plate. It is a schematic diagram which shows the arrangement state of a cutter and a reference plate. (A) is a schematic cross-sectional view taken along line AA showing the positional relationship between the cutter and the weld bead, and (b) is a schematic cross-sectional view taken along line BB showing the positional relationship between the reference plate and the weld bead. It is a schematic diagram of the butt welded portion, and is the schematic view of the butt welded portion which shows (a) a state of being distorted in a convex shape and (b) a concave shape toward the inner side surface 7a of a square steel pipe.

Hereinafter, an embodiment in which the present invention is embodied in a weld bead cutting apparatus will be described with reference to the drawings. The weld bead cutting device 1 shown in FIGS. 1 and 2 is used for cutting a weld bead 8 formed in a butt weld portion of a square steel pipe such as a column material 7, and is used with a cutter 2 for cutting the weld bead 8. , The motor 6 that rotationally drives the cutter 2, the cutter feeding means (41 to 44) that slides the cutter 2 along the welding bead 8, and the fixing means (51 to) that fixes the welding bead cutting device 1 to the column material 7. 54) is provided.

The cutter 2 is a disk-shaped rotary blade, and a cutting blade for cutting the weld bead 8 is provided on the peripheral portion thereof. The cutter 2 includes a bottom surface 2b facing the inner side surface 7a of the column material 7, and a top surface 2a which is a surface opposite to the bottom surface 2b.

The cutter feeding means includes a slide plate 41 that defines the slide direction of the cutter 2, a slide plate support portion 42 that supports the slide plate 41 so as to be slidable, a cutting feed handle 43 that feeds the cutter 2 in the cutting direction, and a cutting feed. It is composed of a screw 44.

The fixing means include a clamp arm 51, a clamp claw 53 and an upper clamp member 52 that clamp the column material 7 from the outer surface 7b and the inner side surface 7a, and a clamp handle 54 that presses the clamp claw 53 toward the upper clamp member 52. It is composed of a reference plate 3.

As shown in FIG. 3, the reference plate 3 is a pair of members having an L-shaped cross section, and supports a pair of legs 31 that abut on the inner side surface 7a of the column material 7 at the end surface 31a and an upper clamp member 52. A support portion 32 that is supported via 32a is provided.

As shown in FIGS. 4 and 5, the end portion 31a of the reference plate 3 determines the reference surface P, and the end portion 31a and the bottom surface 2b of the cutter 2 are included in the reference surface P. The end surface 31a of the leg portion 31 supports the upper clamp member 52 while being in contact with the inner side surface 7a of the column material 7, and as a result, the weld bead cutting device 1 including the cutter 2 is separated from the inner surface surface 7a of the column material 7. Lifted in the direction. Therefore, the cutter 2 can be arranged at a desired position by adjusting the length of the leg portion 31.

Here, the pair of leg portions 31 are arranged so as to face each other with the weld bead 8 in the vicinity of the edge portion of the weld bead 8. Therefore, the end portion 31a of the leg portion 31 is arranged on the distorted uneven surface 7c of the inner surface side 7a of the column material 7 generated by the heat during welding, and the reference surface P is the boundary between the distorted uneven surface 7c and the weld bead 8. Placed in the vicinity.

Next, the operation of the weld bead cutting device 1 configured as described above to cut the weld bead 8 will be described with reference to FIGS. 4 and 5.

First, the clamp handle 54 is turned, the clamp claw 53 is pressed against the upper clamp member 52, and the weld bead cutting device 1 is attached to the column material 7. At this time, the upper clamp member 52 is supported by the support surface 32a of the reference plate 3, and the bottom surface 2b of the cutter 2 is held in the reference surface P.

Subsequently, when the power is turned on to the motor 6, the cutter 2 is rotated, and the cutting feed handle 43 is turned, the cutting feed screw 44 is rotated, and the cutter 2 sets the cutting range D along the inner surface surface 7a of the column material 7. Slide to move and cut the weld bead 8.

Therefore, according to the weld bead cutting device 1 of this embodiment, the reference plate 7 is used to arrange the reference surface P near the boundary between the distorted uneven surface 7c and the weld bead 8, so that the bead cutting is shallow. The cutter 2 can be easily arranged so that the base metal is not scraped.

The present invention is not limited to the above embodiment, and the shape and configuration of each part can be appropriately changed and implemented without departing from the spirit of the present invention. For example, by using the present invention, it can be suitably used not only for cutting a square steel pipe but also for cutting a weld bead after connecting a plate welded by butt-welding steel plates.

1 Welding bead cutting device 2 Cutter (a: top surface, b: bottom surface)
3 Reference plate 4 Cutter feeding means 5 Fixing means 6 Motor 7 Column material (a: inner surface, b: outer surface, c: distorted uneven surface)
8 Welded beads 31 legs (a: end face)
32 Support part (a: support surface)
41 Slide plate 42 Slide plate support 43 Cutting feed handle 44 Cutting feed screw 51 Clamp arm 52 Upper clamp member 53 Clamp claw 54 Clamp handle P Reference surface

Claims (2)

A weld bead cutting device that cuts weld beads formed on the surface of steel materials.
It is provided with a cutter for cutting the weld bead, a motor for rotationally driving the cutter, a cutter feeding means for sliding the cutter along the weld bead, and a fixing means for fixing the weld bead cutting device to a steel material.
A weld bead cutting device, wherein the fixing means includes a reference plate for arranging the cutter on a predetermined reference surface. A pair of the reference plates formed in a substantially L shape is provided.
The reference plate includes a support surface that supports the weld bead cutting device and a leg that lifts the cutter from a steel surface.
The weld bead cutting device according to claim 1, wherein the pair of the legs are arranged so as to face each other with the weld bead in the vicinity of the edge portion of the weld bead.

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