JPH06126456A - Box flange welding equipment - Google Patents

Abstract

PURPOSE:To continuously weld a horizontal part and an R part of a square pipe part by moving a slide body and driving a flange rotating mechanism in the box flange welding equipment. CONSTITUTION:In the equipment to perform welding of the square pipe part 32 and a flange plate 33 to constitute a box flange provided on a connection of square shape steels of a building steel frame, at the time of welding the horizontal part and the R part of the square pipe part 32, a slide body 16 is moved, at the time of welding the R part of the square pipe part 32, the flange rotating mechanism 34 is driven to move a welding torch 18 in the circumferential direction of the square pipe part 32 and besides, a control means which unifies these operations and continuously welds the horizontal part and the R part of the square pipe part 32 is provided. Consequently, the equipment can be simplified and working environment can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box flange welding apparatus for welding a square tubular portion constituting a box flange provided at a connecting portion of square steel of a building steel frame and a flange plate.

[0002]

2. Description of the Related Art Conventionally, a box flange 2 is interposed between the ends of a square steel 1 constituting a building steel frame as shown in FIG. 9, and the box flange 2 and the end of the square steel 1 are connected to each other. Are welded. The box flange 2 is manufactured by overlay welding square flange plates 4 on both ends of a rectangular tube portion 3 having a substantially quadrangular cross section. 5 is a welded part.

In recent years, a box flange welding apparatus has been developed which automatically and continuously connects the square tube portion 3 and the flange plate 4, but when welding the R portion of the square tube portion 3, the square tube portion 3 is welded. The welding torch is rotated and welded only by moving horizontally. The horizontal movement of the welding torch and the rotation of the square tube portion 3 are synchronized so that the weaving of the welding torch is not uneven. As a means of synchronization, the chain is wound around the square tube portion 3 and A means for interlocking with the moving mechanism of the welding torch is adopted.

[0004]

[Problems to be Solved] However, in the box flange welding apparatus, it is necessary to attach the chain to the square tube portion one by one, and it takes a lot of time and effort to prepare for welding, which is a cause of impairing mass productivity.

Further, since the chain portion is mechanically controlled, the mechanism becomes complicated, and the aiming position of the welding torch of the next layer can be controlled according to the cross-sectional shape of the bead of the previous layer after welding. It was difficult.

The box flange welding apparatus of the present invention is intended to solve the above-mentioned drawbacks of the conventional example, and controls the horizontal movement and the weaving operation of the welding torch and the rotational drive of the rectangular tube portion by a CPU or the like. Accordingly, the present invention intends to provide a box flange welding device which can simplify the mechanism and can promptly deal with a change of a work or the like.

[0007]

That is, according to the box flange welding apparatus of the present invention, the square tube portion and the flange plate abutting against the end portion of the square tube portion are oriented with the center line of the square tube portion in the horizontal direction. A flange rotating mechanism that rotates in a closed state, and a slide body that is movable in a direction perpendicular to the center line of the square tube portion,
In a box flange welding device provided with a welding torch which is held at a predetermined interval by the slide body with respect to the square tube portion and which is capable of weaving in the horizontal direction, when welding the horizontal portion and the R portion of the square tube portion, When the slide body is moved and the R portion of the square tube portion is welded, the flange rotating mechanism is driven to move the welding torch in the circumferential direction of the square tube portion, and these operations are integrated to horizontally move the square tube portion. And a control means for continuously welding the portion and the R portion.

[0008]

In the box flange welding apparatus of the present invention, the horizontal movement of the welding torch, the weaving operation, and the rotational driving of the square tube portion are controlled integrally by the CPU or the like. It can be simplified and the noise generated by the chain is eliminated,
The working environment is greatly improved.

Further, it is possible to promptly respond to changes in the work and the like, and it is possible to set up a production system suitable for recent small-lot production of a wide variety of products.

Furthermore, it is possible to control the aiming position of the welding torch of the next layer in accordance with the cross-sectional shape of the bead of the previous layer after the welding, and it is possible to perform extremely quick welding.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A box flange welding apparatus of the present invention will be described in detail below with reference to the drawings. 1 to 3, reference numeral 11 denotes a base, which is a base 1 attached in the horizontal direction.
Two columns 12 are erected on the 1 at a predetermined interval. A guide rail 13 is horizontally provided between the columns 12.
The guide rail 13 is attached to
It is possible to move up and down along 2 and to be able to engage with the cross rail 15 attached to the upper end of the column 12 by the suspending tool 14. A slide body 16 is movably held in the guide rail 13 in a horizontal direction, and a sensor 17 for measuring a cross-sectional shape of a bead after welding is provided on the slide body 16.
A welding torch 18 such as a carbon dioxide welding machine is held.

That is, the slide body 16 has a horizontal moving cylinder 21 suspended from the guide rail 13, a horizontal arm 22 driven by the horizontal moving cylinder 21 and moving in a direction perpendicular to the guide rail 13, a welding torch 18 and a sensor 17. And a guide roller 24 rotatably attached to the lower part of the horizontal moving cylinder 21. And the slide body 16
Freely reciprocates along the guide rails 13.

A welding torch 18 such as a carbon dioxide welding machine attached via a horizontal arm 22 which is extendable / contractible in the horizontal direction, and a sensor 17 for detecting a cross-sectional shape of a welded portion or a bead of a front layer after welding. Are controlled so that welding work and sensing operation are performed separately. The arm 22 is movable up and down by a horizontal moving cylinder 21 suspended from a guide rail 13 via an elevating mechanism (not shown), and the expansion and contraction of the arm 22 causes the welding torch 18 to move in the Y-axis direction and as the Z moves by elevating. It is designed to move and position in the axial direction. The welding torch 1
8 is held at the tip of the arm 22 so that the angle with respect to the box flange can be adjusted variously.

A pair of arch-shaped support arms 31 are erected on the base 11 with the column 12 interposed therebetween, one of which is fixed and the other of which can be moved back and forth on the base 11 according to the work. ing. A flange rotation mechanism 34 such as a stepping motor is provided on the fixed side support arm 31, and the square tube portion 32 and the flange plates 33 abutting on both ends of the square tube portion 32 are centered on the center line of the square tube portion 32. It is designed to rotate as. The guide roller 24 moves around the square tube portion 32 in accordance with this rotation, and holds the welding torch 18 at a predetermined interval on the square tube portion 32.

In the figure, reference numeral 35 is a control panel attached to the side of the support column 12 to which various welding conditions can be input.

FIG. 4 shows an example of the system configuration of the box flange welding apparatus of the present invention.

The above system includes a flange rotating mechanism 34,
Welding unit 3 including welding torch 18 and control panel 35
6, a welding power source 37 that supplies electric power to each part of the welding unit 36, a carbon dioxide gas cylinder 38 connected to the welding power source 37, and a wire supply device 39 connected to the welding torch 18, Desirably, a remote controller 41 and a monitor personal computer 42 are attached to the control panel 35 to enable remote operation and data processing. Reference numeral 43 is a printer attached to the monitor personal computer 42.

Next, the operation of the box flange welding apparatus of the present invention will be described with reference to FIGS.

First, in the state where the box flange temporarily attaches the flange plates 33 to both ends of the rectangular tube portion 32, the box flange is held by the support arm 31 so that one surface of the rectangular tube portion 32 becomes horizontal. In addition, the length of the welding line and other conditions can be set in advance using a limit switch, etc.
It is input to the control unit consisting of.

The guide roller 24 is brought into contact with the square tube portion 32, and the tip of the welding torch 18 is attached to the square tube portion 32.
And the flange plate 33 are opposed to the welded portion. Next, the shape of the groove cross section is measured by the sensor 17, and the result is judged to move the horizontal moving cylinder 21 along the guide rail 13 to extend and contract the arm 12 to perform welding while repeating weaving. Next, the sensor 17 moves the horizontal moving cylinder 21 along the guide rail 13 from this state, and the welding torch 18 is weaved in the direction perpendicular to the moving direction. During this operation, the guide roller 24 holds the welding torch 18 at a predetermined interval with respect to the square tube portion 32.

When the welding torch 18 reaches the R portion of the square tube portion 32, the flange rotating mechanism 34 rotates the square tube portion 32 and the flange plates 33 abutted on both ends of the square tube portion 32 as shown in FIG. Let At this time, the locus of movement of the welding torch 18 may stop, depending on the width of the weaving, etc.
It may appear to go backwards. This tendency is particularly remarkable when it is necessary to narrow the width of the weaving in consideration of the decrease in the buildup due to the inclination of the R portion.

When the R portion of the rectangular tube portion 32 rises in response to the driving of the flange rotation mechanism 34, the guide rail 13 rises along the support column 12 and the welding torch 18 also rises. The welding torch 18 starts descending after finishing passing through the R portion, and this time, on the contrary, weaving while moving at a higher speed in the traveling direction, and the next surface of the rectangular tube portion 32 becomes horizontal as shown in FIG. At that point, the original moving speed is restored.
By repeating the above operation, the entire circumference of the rectangular tube portion 32 can be welded. The weaving pattern at this time is shown in FIG.

The weld beads are successively stacked according to the wall thickness of the box flange and other conditions, but the cross-sectional shape of the bead of the previous layer after welding is always measured by the sensor 17, and the bead of the next layer is measured. The target position of the welding torch 18 is determined. Therefore, multilayer build-up welding can be performed very accurately.

When welding the horizontal portion and the R portion of the above rectangular tube portion, the operation of weaving the welding torch while moving the slide body, and driving the flange rotating mechanism at the time of welding the R portion of the rectangular tube portion are performed. The movement speed of the welding torch 18 and the weaving width are the movement means for moving the welding torch in the circumferential direction of the welding torch, and the control means for integrating these movements to continuously weld the horizontal portion and the R portion of the square tube portion. An optimum weaving pattern can be obtained by calculating the locus and the rotation speed of the R portion of the square tube portion when the flange rotation mechanism is driven.

As another control means, the above operation is repeated many times to obtain a large amount of data, and this is used as a control panel 35.
Alternatively, the optimum weaving pattern can be obtained by processing with the CPU incorporated in the monitor personal computer 42. In this method, it is necessary to determine the weaving pattern for each type of work, but once the optimum weaving pattern is obtained, the subsequent work is not very difficult.

While repeating this operation, welding beads are successively stacked. The shape of the groove cross section is measured every time one-pass welding is completed, and the result is judged to repeat the welding while controlling the target position of the welding torch 13 of the next layer.

[0027]

In the box flange welding apparatus of the present invention, the horizontal movement of the welding torch, the weaving operation, and the rotational drive control of the square tube portion are integrated by the CPU or the like, so that there is no chain portion. The mechanism can be simplified, the noise generated by the chain is eliminated, and the working environment is greatly improved.

Further, it is possible to promptly respond to changes in the work and the like, and it is possible to set up a production system suitable for recent small-lot production of a wide variety of products.

Furthermore, it is possible to control the aiming position of the welding torch of the next layer in accordance with the cross-sectional shape of the bead of the previous layer after welding, and it is possible to perform extremely quick welding.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a box flange welding apparatus of the present invention.

FIG. 2 is an enlarged side view of a main part of FIG.

FIG. 3 is a sectional view for explaining a guide roller 24.

FIG. 4 is a block diagram showing an example of a system configuration of the box flange welding apparatus of the present invention.

FIG. 5 is a schematic view for explaining the operation of the box flange welding device.

FIG. 6 is a schematic view for explaining the operation of the box flange welding device.

FIG. 7 is a schematic view for explaining the operation of the box flange welding device.

FIG. 8 is an explanatory diagram of a weaving pattern.

FIG. 9 is a perspective view of an applied portion of a box flange.

[Explanation of symbols]

 11 Base 12 Pillar 13 Guide Rail 14 Lifting Tool 15 Side Rail 16 Slide Body 17 Sensor 18 Welding Torch 21 Horizontal Moving Cylinder 22 Horizontal Arm 23 Bracket 24 Guide Roller 31 Support Arm 32 Square Tube 33 Flange Plate 34 Flange Rotating Mechanism 35 Control Panel 36 Welding unit 37 Welding power source 38 Carbon dioxide gas cylinder 39 Wire supply device 41 Remote control 42 Monitor personal computer 43 Printer

Claims (1)

[Claims] 1. A flange rotating mechanism for rotating a square tube portion and a flange plate abutting against an end portion of the square tube portion with a center line of the square tube portion oriented in a horizontal direction, and a flange rotating mechanism of the square tube portion. Box flange welding apparatus provided with a slide body movable in a direction perpendicular to the center line, and a welding torch which is held at a predetermined interval with respect to a rectangular tube portion by the slide body and which is horizontally weavable At the time of welding the horizontal portion and the R portion of the square tube portion, the slide body is moved,
When welding the R portion of the square tube portion, the flange rotating mechanism is driven to move the welding torch in the circumferential direction of the square tube portion, and these operations are integrated to continuously connect the horizontal portion and the R portion of the square tube portion. And a control means for welding the box flange welding device.