JP2001121292A - Method and device for automatically removing dowel of steel frame box column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve dowel removing workability, to reduce the burden on a worker, and to further improve the working environment in the method and device for automatically removing the dowel of a steel frame box column. SOLUTION: When the dowel D formed in the electroslag welding in manufacturing the steel frame box column 12 is removed, an objective dowel to be removed is selected among the dowels formed on both side surfaces of the steel frame box column placed and set on a conveyor as a carrying means, a cutting head 20 of a dowel cutter 19 provided in an advancing/retracting manner to/from a pair of milling devices 11 installed on both sides of the steel frame box column is positioned to the selected objective dowel, the distance between the cutting head and a skin plate surface A of the steel frame box column is detected by a dowel sensor 21, and the objective dowel is cut simultaneously on the right and left sides or on one side at a time by operating the dowel cutter based on the result of detection, and the cutting surface is finished flat until it is flush with the skin plate surface to automatically remove the dowel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of an automatic dowel removing method and apparatus for removing a dowel (excess portion) formed by electroslag welding when manufacturing a steel box column. .

[0002]

2. Description of the Related Art Conventionally, when removing dowels formed on each surface of a steel box column in this manner, for example, a steel box column is carried into a finishing stage, and the steel frame is first manually inserted by manual arc air gouging. The dowels formed on both side surfaces of the box pillar are melted and removed, and the surface is manually cut to the skin plate surface (base material surface) using a manual grinder. Then, after removing and finishing all the dowels on both sides in the same manner, the steel frame box column was inverted, and the above procedure was repeated in the same manner to remove all the dowels on the four sides.

[0003]

However, conventionally, after a step of melting and removing a dowel by a manual arc air gouging, a finishing step is further performed by grinding with a manual grinder, and in each case, a two-step operation is performed manually. Therefore, the workability of the dowel removal work is poor, and all of them are painful 3K work, which puts a heavy burden on the worker, and further causes noise, fume, dust, etc. at the time of work, which leads to deterioration of the work environment. There was a problem that.

Accordingly, an object of the present invention is to solve such problems, improve the workability of the dowel removing work, reduce the work load on the worker, and further improve the working environment. is there.

[0005]

Means for Solving the Problems The object of the present invention is to remove a dowel (surplus part) formed by electroslag welding at the time of manufacturing a steel box column, and to set and set a steel box column mounted on a conveying means. The dowels to be cut are selected from the dowels formed on both side surfaces of the dowel cutter, and the selected dowels to be cut and the dowel cutter cutting head provided so as to be able to advance and retreat to a pair of milling cutting means installed on both sides of the steel box column. The dowel sensor detects the distance between the cutting head and the skin plate surface of the steel box column with the dowel sensor.Based on the detection result, the dowel cutter is operated to cut the dowel on the left and right sides simultaneously or one side at a time. Is achieved by making the surface smooth until it is flush with the surface of the skin plate.

An object of the present invention is to provide an automatic dowel removing device for a steel box column for removing a dowel (surplus portion) formed by electroslag welding when a steel box column is manufactured.
A transporting means for placing a steel box column and transporting it in accordance with the dowel positions formed on both sides thereof, and a movable means mounted on both sides of the transporting means so as to be movable and adjustable in the longitudinal direction of the steel box column on a gantry. Milling cutting means comprising a head-type cutting means, a milling cutting type dowel cutter, which is provided with a cutting head capable of moving forward and backward in the left and right directions perpendicular to both side surfaces of the steel box column, and which is vertically movable. A dowel sensor attached to the milling means for detecting the distance between the cutting head of the dowel cutter and the skin plate surface of the steel box column, and a dowel formed from the dowels formed on both side surfaces of the steel box column are selected. Based on the detection result, the dowel cutter is operated to cut the dowels to be cut at the same time on both left and right sides or one side at a time. It is accomplished by constructing and an electrical control means for controlling so as to be smoothly finished until it is.

[0007] The above object is achieved by a touch sensor in which a sensing rod is provided so as to be able to move forward and backward as the dowel sensor.

[0008] The above object is attained in claim 2 or 3.
The transfer means is constituted by a conveyor, and the drive of the conveyor is controlled by the electric control means to position the steel box column with respect to the milling cutting means at each dowel position formed in the length direction of the steel box column. It is achieved by becoming.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an outline of an automatic dowel removing device for a steel box column according to the present invention. The apparatus includes, as a whole, a conveyor 10 that is, for example, a means for transporting a steel box column,
A milling device 11 is provided.

In the finishing stage, a steel box column 12 carried in to remove a dowel D formed by electroslag welding is placed on a conveyor stage. In this automatic dowel removing apparatus, the steel box column 12 on the conveyor 10 can be fixedly set by a clamp (not shown).

The milling machine 11 is mounted on a gantry 13.
A pair of device main bodies 1 facing left and right with an appropriate interval between them
This is a two-headed cutting device that is configured by mounting No. 4 and No. 14 thereon.

[0013] Then, as shown in FIG.
4 and 14 are connected by a long bridging member 15 on the upper side, and the device main bodies 14 and 14 are connected to the gantry 13.
It is mounted on a guide rail 16 provided in the length direction (X-axis direction) of the steel box column 12 so as to be movable and adjustable in the same direction. An operation panel 17 incorporating the electric control means of the present invention is supported on the bridge member 15 via an L-shaped arm 17a.

The apparatus main bodies 14, 14 are both on the near side in FIG. 2, and a feed shaft 18 having a screw rod structure is rotatably erected in a direction (Y-axis direction) perpendicular to the steel frame box column 12 vertically. Each feed shaft 18 is provided with a dowel cutter 19 for dowel cutting.

On the dowel cutters 19, on opposite sides,
The cutting head 20 is provided so as to be able to advance and retreat in a direction (Z-axis direction) perpendicular to the left and right with respect to the steel box column 12. Further, in the illustrated automatic dowel removing device, for example, a dowel sensor 21 is attached to the bottom of the dowel cutter 19. In this example, as the dowel sensor 21, for example, a sensing rod 21 described later is used.
Similarly, a is configured using a touch sensor provided to be able to advance and retreat in a direction perpendicular to the left and right with respect to the steel box column 12.

In the illustrated automatic dowel removing apparatus, the operation panel 17 is operated to control the whole by the electric control means, and for example, the conveyor 10 is driven and controlled to form the steel box column 12 in the longitudinal direction. The box column 12 can be positioned with respect to the milling cutter 11 for each dowel position. Further, the motor drive of the milling cutter 11 is controlled so that the milling cutter 11 can be appropriately moved and adjusted in the longitudinal direction of the steel box column 12. Furthermore, dowel cutter 1
The motor drive 9 can be selectively moved up and down in the vertical direction via the feed shaft 18 by selectively controlling the motor drive separately for the left and right.
The operation of the cutting head 20 is selectively controlled left and right individually so as to advance and retreat in the left-right direction, and the operation of the dowel sensor 21 is selectively controlled individually left and right to appropriately advance and retreat in the left-right direction.

Next, a method of removing the dowel D formed on each surface of the steel box column 12 using the illustrated automatic dowel removing device having the above-described configuration will be described. In that case, for example, as shown in the flowchart of FIG. 3, in step S1, the steel box column 12 is carried into the finishing stage, where it is placed on the conveyor 10, and the conveyor 10 is operated and transported to a predetermined position. In step S2, the steel box column 12 is fixedly set with the clamp.

Then, in step S3, the touch panel on the operation panel 17 is operated to input data (vertical distance of the dowel, width and height of the box column 12, etc.). Next, in step S4, although not shown, the operation of the chip collecting machine for collecting chips generated during dowel cutting is turned on.

In step S5, the operation panel 17
Operate the manual button above to select manual mode. In that case, as shown in the flowchart of FIG. 4, the operation of the feed shafts 18 and the like of the left and right milling cutters 11 automatically becomes the synchronous mode. Alternatively, only the left mode or the right mode can be selected by a lever switch input operation, and the left and right modes can be manually operated independently. Then, after the manual operation, the apparatus enters the automatic mode waiting.

As shown in the flowchart of the home return in FIG. 5, after the power is turned on, the home return button is awaited, and the touch panel of the operation panel 17 says "Perform home return. Press the home return button." Is displayed.
Then, when you press the homing button, automatic homing is performed, and "Home return completed. Select manual mode." Is displayed. After completion of the home position return, the above-mentioned manual mode wait (manual button wait) occurs.

After this manual mode is selected, as shown in FIG. 3, in step S6, it is selected whether to remove the dowel on the flange side or the BC side of the steel box column 12. At this time, the remaining amount of the dowel is selected, and the remaining amount data is input by the touch panel. Next, in step S7, a dowel position, that is, a dowel to be cut is selected. In that case, usually, the left and right dowels are selected. Of course, the dowels to be cut can be individually selected for the left and right.

Thereafter, in step S8, the apparatus main bodies 14, 14 and the dowel cutter 19 are manually fed by manual operation, and the cutting head 20 is aligned with the center of the dowel D to be cut. Then, as shown in FIG. 6A showing the case of selecting both sides of the dowel, for example, the cutting head 20 is set to the upper dowel D1 about 100 mm before the skin plate surface A of the steel box column 12.

As shown in FIG. 3, at step S9, the automatic mode is selected by operating the touch panel on the operation panel 17, and at step S10, the operation start button is pressed to start automatic cutting.

In the case of automatic cutting, at step S11,
Sensing is performed by the dowel sensor 21. That is, FIG.
As shown in (b), the sensing rod 21a is pushed out, the cutting head 20 is advanced, and touch sensing is performed.
The distance between the cutting head 20 and the skin plate surface A is measured simultaneously on both the left and right sides. Then, based on the detection result of the dowel sensor 21, as shown in FIG.
To start cutting the upper dowel D1 at the same time on both the left and right sides, while pulling back the sensing rod 21a. In this manner, the upper dowel D1 is automatically cut by the cutting head 20 to finish it smoothly until the cut surface is flush with the skin plate surface A.

Further, as shown in FIG. 6D, based on the distance data between the upper and lower dowels D1 and D2, the dowel cutter 19 is lowered via the feed shaft 18 and
Is automatically aligned with the lower dowel D2. Similarly, touch sensing is performed by the dowel sensor 21 to simultaneously measure the distance between the cutting head 20 and the skin plate surface A on both the left and right sides, and based on the detection result, as shown in FIG.
The lower dowel D2 is automatically cut by the cutting head 20 on both the left and right sides at the same time, so that the cut surface is made smooth until it is flush with the skin plate surface A. On the other hand, the sensing rod 21a is retracted and returned. After finishing, the cutting head 20 is moved 100 m from the skin plate surface A as shown in FIG.
Move backward by m and return to the original standby position.

In the case of the automatic mode, as shown in the flow chart of FIG. 7, after selecting the automatic mode, the automatic start is started by pressing the operation start button. After that, when the stop button is pressed, the automatic operation is started. When the feed stop button is pressed, the feed of the cutting head 20 can be temporarily stopped, and can be restarted with the operation start button. After the end of the automatic operation (the end of the automatic cutting), the operation waits for the manual mode selection.

Thus, as shown in FIG.
After completion of the automatic cutting of the pair of upper and lower dowels D1 and D2 at 12, the conveyor 10 is operated again to remove the next pair of adjacent upper and lower dowels to move the steel box column 12 to a predetermined position at step S13. It is conveyed, and the above-mentioned manual mode is selected. In this manner, the above-mentioned cutting operation procedure is repeated, and the dowels formed on both sides of the steel box column 12 are simultaneously removed on both sides. Then, the steel box column 12 is turned 90 degrees using, for example, a turning machine, and the dowels formed on the other side surfaces are cut by the same operation procedure as described above to remove all four surfaces.

In the above-described example, in the selection of the dowel position to be cut, the upper and lower dowels are selected and cut and removed for each of the upper and lower dowels. However, only the upper dowel D1 on both side surfaces of the steel box column 12 is selected and removed. Are sequentially removed,
Alternatively, it is also possible to select only the lower dowel D2 and sequentially remove them.

For example, when only the upper side is selected, FIG.
As shown in (a), the cutting head 20 is manually positioned and set to the upper dowel D1. Then, as shown in FIG. 3B, the distance between the cutting head 20 and the skin plate surface A is measured simultaneously on both the left and right sides by touch sensing with the dowel sensor 21, and based on the detection result, as shown in FIG. Then, the upper dowel D1 is automatically cut at the same time on both the left and right sides by the cutting head 20 so that the cut surface is smoothed until it becomes flush with the skin plate surface A. On the other hand, the sensing rod 21a is retracted and returned to the front. After the finishing, the cutting head 20 is retracted 100 mm before the skin plate surface A and returned to the original standby position, as shown in FIG.

On the other hand, when only the lower side is selected, FIG.
As shown in (a), the cutting head 20 is manually positioned and set in the lower dowel D2. Then, as shown in FIG. 2B, the distance between the cutting head 20 and the skin plate surface A is simultaneously measured by touch sensing with the dowel sensor 21 on both the left and right sides, and based on the detection result, as shown in FIG. Then, the lower dowel D2 is automatically cut at the same time on both the left and right sides by the cutting head 20 so as to finish smoothly until the cut surface is flush with the skin plate surface A. On the other hand, the sensing rod 21a is retracted and returned to the front. After the finishing, the cutting head 20 is retracted 100 mm before the skin plate surface A and returned to the original standby position, as shown in FIG.

Further, in the illustrated automatic dowel removing device, the dowels to be cut can be individually selected on both the left and right sides as described above. As shown in FIG. It is also possible to select the upper dowel D1 and remove it sequentially, and select the lower dowel D2 on the right side and remove it sequentially.

Further, in each of the above examples, the case where the dowels formed on both side surfaces of the steel box column 12 are simultaneously cut on both the left and right sides has been shown. You can also.

Although the touch sensor is used as the dowel sensor 21 in the above-described example, other sensors such as a photo sensor can be used.

[0034]

According to the present invention configured as described above, the following effects can be obtained.

According to the first and second aspects, when removing the dowel formed by electroslag welding at the time of manufacturing the steel box column, the selected dowel to be cut and a pair of the dowels installed on both sides of the steel box column are removed. Align the cutting head of the dowel cutter provided in the milling cutting means so as to be able to advance and retreat, detect the distance between the cutting head and the skin plate surface of the steel box column with the dowel sensor, operate the dowel cutter based on the detection result, and set the dowel to be cut. By cutting both the left and right sides simultaneously or one side at a time and finishing smoothly until the cut surface is flush with the skin plate surface, the manual dowel melting and removal process as in the past, and the same manual grinding finish The two-step work of the process
Labor saving in the process to improve the workability of the dowel removal work, and also eliminate the painful 3K work to reduce the burden on the workers, and also to prevent the generation of noise, fumes, dust, etc. during work, and work environment Can be further improved.

According to the third aspect of the present invention, since the touch sensor is provided as the dowel sensor, the sensing rod of which is capable of moving forward and backward, regardless of the color of the steel box column, etc., the gap between the cutting head and the skin plate surface of the steel box column can be obtained. The distance can be reliably detected.

According to the fourth aspect, the conveying means is constituted by a conveyor, and the driving of the conveyor is controlled by the electric control means, so that the steel box column is formed at every dowel position formed in the longitudinal direction of the steel box column. By adopting a configuration in which the positioning is performed with respect to the milling cutter, the conveyance of the steel box column can be automated, and the positioning operation of the milling cutter can be significantly facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of an automatic dowel removing device for a steel box column according to the present invention.

FIG. 2 is an external perspective view of the automatic dowel removing device shown without a conveyor.

FIG. 3 is a flowchart showing a cutting operation procedure.

FIG. 4 is a flowchart illustrating a control program for a manual mode operation.

FIG. 5 is a flowchart illustrating a control program for returning to origin.

FIG. 6 is a flowchart illustrating a cutting operation when upper and lower dowels are selected.

FIG. 7 is a flowchart illustrating a control program for automatic mode operation.

FIG. 8 is a flowchart illustrating a cutting operation when an upper dowel is selected.

FIG. 9 is a flowchart illustrating a cutting operation when a lower dowel is selected.

FIG. 10 is an explanatory diagram showing a case where an upper dowel is selected on the left side of the steel box column and a lower dowel is selected on the right side for cutting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Conveyor (conveyance means) 11 Milling cutting device 12 Steel box column 13 Frame 14 Machine body 17 Operation panel 18 Feed shaft 19 Dowel cutter 20 Cutting head 21 Dowel sensor A Skin plate surface D Dowel D1 Upper dowel D2 Lower dowel

Continued on the front page (72) Inventor Shoji Yamaguchi 118 Notsuka, Noda City, Chiba Prefecture Kawasaki Heavy Industries Noda Factory (72) Inventor Hideto Nishida 118 Futatsuka Noda City, Chiba Prefecture Kawasaki Heavy Industries Noda Factory F-term ( Reference) 3C022 DD01 DD11 DD12 DD19 4E081 YB03 YX07 YX20

Claims (4)

[Claims] 1. A dowel formed on both side surfaces of a steel box column placed and set on a conveying means when removing a dowel (excess portion) formed by electroslag welding when manufacturing a steel box column. The dowels to be cut are selected from the above, and the dowels to be cut are aligned with the dowel cutter cutting heads provided to be able to advance and retreat to a pair of milling cutters installed on both sides of the steel box column. The dowel sensor detects the distance between the skin plate surfaces of the box pillars, and based on the detection result, operates the dowel cutter to cut the dowels to be cut at the same time on both the left and right sides or one side at a time, and the cut surface is flush with the skin plate surface An automatic dowel removal method for steel box columns, characterized by smooth finishing as far as possible. 2. An automatic dowel removing device for a steel box column for removing a dowel (surplus portion) formed by electroslag welding at the time of manufacturing a steel box column, wherein the steel box column is placed and formed on both side surfaces thereof. Transport means for transporting according to the dowel position, and two-headed cutting means mounted on both sides of the transport means so as to be movable and adjustable in the length direction of the steel box column on the gantry,
Milling cutting dowel cutters, each of which is provided with a cutting head capable of moving forward and backward in the left and right directions perpendicular to both side surfaces of the steel box column, and milling cutting means provided to be able to move up and down in the vertical direction, and to these milling cutting means. , A dowel sensor that detects the distance between the cutting head of the dowel cutter and the skin plate surface of the steel box column, and a dowel that is to be cut are selected from the dowels formed on both sides of the steel box column, and the dowel cutter is selected based on the detection result by the dowel sensor. An electric control means for controlling the dowels to be operated to cut the dowels at the same time on both the left and right sides or one side at a time so that the dowel cutting surface is finished smoothly until it is flush with the skin plate surface. An automatic dowel removal device for steel box columns. 3. An automatic dowel removing device for a steel box column according to claim 2, wherein the dowel sensor is a touch sensor provided with a sensing rod so as to be able to move forward and backward. 4. The steel frame according to claim 2, wherein said conveying means is constituted by a conveyor, and the driving of said conveyor is controlled by said electric control means for each dowel position formed in the length direction of the steel box column. An automatic dowel removing device for a steel box column having a box column positioned with respect to the milling means.