JPH0740041A - Box flange welding equipment - Google Patents

Abstract

PURPOSE:To obtain a welding equipment suitable to automate welding work by providing a travel mechanism to hold a work rotating mechanism free to move in the longitudinal direction of a work and a reversing mechanism to reverse the direction of a torch. CONSTITUTION:As a flange plate 33 is tacked on both ends of a square tube part 32, a work is held to a support arm 31 so that one face of the square tube part 32 is horizontal. A groove shape is measured by a sensor 17, with extending/retracting a horizontal arm, welding is executed while weaving is repeated in the traveling direction and right angle direction thereto. When welding of the weld zone between one side's square tube part 32 and flange plate 33 is completed, a support base 52 travels on a slide rail 51, the weld zone between the other side's square tube part 32 and flange plate 33 is traveled between a support column 12. At the same time, by actuating the reversing mechanism 23 integrated in a slide body 16, a bracket 21 is reversed, the direction of a welding torch 18 and sensor 17 is reversed 180 deg.. The subsequent welding is executed in the same as before. By this method, the welding work can be automated.

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 rectangular plate and a flange plate, which form a box flange mainly provided at a connecting portion of square steel of a building steel frame. .

[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. 7, 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.

Conventionally, a box flange welding apparatus has been developed which continuously and automatically welds the square tube portion 3 and the flange plate 4, but at the time of welding the box flanges at both ends of the square tube portion 3 respectively. Moves the square tube portion 3 together with its holding mechanism to a position separated from the welding torch, changes the direction of the square tube portion 3 and attaches it again to the holding mechanism, and performs welding with almost no change in the position of the welding torch. Has become. A lifting mechanism for the rectangular tube portion 3 is attached to the device.

[0004]

[Problems to be Solved] However, in the box flange welding apparatus, it is necessary to change the direction of the square tube portion by a lifting mechanism, which requires a lot of time to prepare for welding, which is a cause of impairing mass productivity. It was

The box flange welding apparatus of the present invention is intended to solve the above-mentioned drawbacks of the conventional example. An object of the present invention is to provide a box flange welding device more suitable for automation.

[0006]

That is, the box flange welding apparatus of the present invention is a work rotating machine for rotating a work having a welding portion at a predetermined position in the lengthwise direction with the center line of the work oriented horizontally. In a box flange welding apparatus equipped with a mechanism and a welding torch that is held at a predetermined interval with respect to the work and that can be weaved in the horizontal direction, the work rotating mechanism can be moved along the length of the work. It is characterized in that it has a moving mechanism for holding and a reversing mechanism for reversing the direction of the welding torch at the time of welding at each welding site.

One of the features is that the reversing mechanism for reversing the direction of the welding torch is composed of a rotating mechanism that rotates by a rotating shaft that is perpendicular to the center line of the work.

[0008]

According to the box flange welding apparatus of the present invention, the horizontal moving means of the work rotating mechanism and the reversing means for reversing the direction of the welding torch are provided, so that even when welding the respective welding parts at predetermined positions of the work. , The horizontal rotation of the work rotating mechanism and the operation of reversing the direction of the welding torch can be simply dealt with, and it is now possible to provide a box flange welding apparatus more suitable for automation of welding work.

Further, since it is not necessary to change the direction of the work piece by using the lifting mechanism, it does not take any time to prepare for welding, and a production system suitable for mass production can be prepared.

[0010]

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 by taking a box flange as an example.

1 to 3, 11 is a base,
Two columns 1 are mounted on this base 11 attached in the horizontal direction.
2 are erected at predetermined intervals. A guide rail 13 is horizontally attached between the columns 12,
This guide rail 13 can be moved up and down along the column 12,
The cross rail 1 attached to the upper end of the column 12 by the hanging tool 14.
5 can be engaged. This guide rail 1
A slide body 16 is held on the slide body 3 so as to be movable in the horizontal direction, and a sensor 17 for measuring the cross-sectional shape of the bead after welding and a welding torch 18 such as a carbon dioxide welding machine are held on the slide body 16. Has been done.

That is, a bracket 21 holding a welding torch 18 and a sensor 17 is hung on the slide body 16 via a rotary shaft 22, and the rotary shaft 22 is a forward / reverse rotation motor or actuator built in the slide body 16. Are connected to the reversing means 23 including Therefore, by driving the reversing means 23, the bracket 21 can be reversed and the directions of the welding torch 18 and the sensor 17 can be reversed by 180 °.

More specifically, the bracket 21 holds a horizontal moving cylinder 24, and the horizontal moving cylinder 2
The horizontal arm 25, which is driven by 4 and moves in a direction perpendicular to the guide rail 13, includes a welding torch 18 and a sensor 1.
The housing 26 provided with 7 is moved horizontally. Reference numeral 27 denotes a guide roller rotatably attached to the lower portion of the horizontal moving cylinder 24. Then, the slide body 16 freely reciprocates along the guide rail 13.

A welding torch 18 such as a carbon dioxide welding machine attached via a horizontal arm 25 which is capable of expanding and contracting 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 horizontal arm 25 is vertically held by a horizontal moving cylinder 24 suspended by a vertically movable guide rail 13 via a bracket 21, and the expansion and contraction of the horizontal arm 25 moves the welding torch 18 in the Y-axis direction. Is designed to move and position in the Z-axis direction.
The welding torch 18 can be swung at the tip of the horizontal arm 25, and the angle with respect to the box flange can be adjusted in various ways.

A work rotating mechanism is mounted on the base 11.
A moving mechanism for movably holding it is mounted on a slide rail 51 provided along the length direction of the box flange. The work rotating mechanism and its moving mechanism have the following configurations. That is, the slide rail 51
A pair of arch-shaped support arms 31 are erected on a support base 52 with a work sandwiched therebetween. The arch-shaped support arm 31 can move back and forth on the slide rail 51 according to the work. A stepping motor 34 is provided on the support arm 31, and a work including, for example, a square tube portion 32 and flange plates 33 abutting on both ends of the square tube portion 32 is rotated about its center line. ing. The guide roller 27 also serves as a copy by moving around the square tube portion 32 with this rotation, and also holds the welding torch 18 at a predetermined interval on the square tube portion 32.

The support base 52 travels on the slide rail 51 via a slide roller 53, detects a predetermined position by a sensor, and a stopper 54 driven by an air cylinder or the like provided on the support arm 31 contacts the slide rail 51. Positioned by contact. In this case, it is desirable that the support arm 31 on the side to be welded by the welding torch 18 be fixed by the stopper 54.

The slide rail 51 extends longer on one side of the column 12 so that the box flange can be easily attached to and detached from the work rotating mechanism at this position.

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 welding unit 36 including a work rotating mechanism and its moving mechanism, a welding torch 18, a control panel 35, a welding power source 37 for supplying electric power to each part of the welding unit 36, and this welding power source 37. It is equipped with a carbon dioxide gas cylinder 38 connected to and connected to the welding torch 18, and a wire supply device 39 connected to the welding torch 18. Desirably, a remote control 41 and a monitor personal computer 42 are attached to the control panel 35 for remote control and data processing. Should be possible. 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 FIG.

First, the flange plates 33 are provided on both ends of the rectangular tube portion 32.
In the state of being temporarily attached, the work serving as the box flange is held by the support arm 31 so that one surface of the square tube portion 32 is horizontal. In addition, the length of the welding line and other conditions can be set in advance using limit switches, etc.
It is input to the control unit consisting of.

Then, the guide roller 27 is attached to the square tube portion 32.
While abutting on the upper side, the tip of the welding torch 18 is made to face the welding portion of the one square tubular portion 32 and the flange plate 33. Then, the shape of the groove cross section is measured by the sensor 17, and the result is judged to move the horizontal moving cylinder 24 along the guide rail 13 to extend and contract the horizontal arm 25 to weave in the direction perpendicular to the moving direction. Weld while repeating. Guide roller 2 during this operation
7 holds the welding torch 18 to the square tube portion 32 at a predetermined interval.

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 square tube portion 32, the operation of weaving the welding torch 18 while moving the slide body 16 is performed, and the work rotating mechanism is driven when the R portion of the square tube portion 32 is welded. Square tube part 3
2 movements of the welding torch 18 in the circumferential direction, and these movements are integrated to integrate the horizontal portion of the square tube portion 32 and the R portion.
As the control means for continuously welding the parts, if the moving speed and the weaving width of the welding torch 18 and the locus and the rotating speed of the R portion of the square tube portion 32 when the work rotating mechanism is driven are calculated, The optimum weaving pattern can be obtained.

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 18 of the next layer.

When the welding of the welded portion of the one square tube portion 32 and the flange plate 33 is completed, the support base 52 travels on the slide rail 51 as shown by the alternate long and short dash line in FIG. And the flange plate 33 are welded to the support column 12
Move between. At the same time, by driving the reversing means 23 built in the slide body 16, the bracket 21
Is reversed and the directions of the welding torch 18 and the sensor 17 are reversed by 180 °. The procedure of the subsequent welding work is the same as above.

In the above, positioning and opening / closing operations of the support arm 31 and the like, automatic retraction and positioning of the welding torch 18 and the like as the guide rail 13 is raised and lowered, and operation of the work rotating mechanism are automatically measured by a sensor and the CPU is operated. The welding work can be greatly automated by processing in.

FIG. 6 shows another embodiment of the box flange welding apparatus of the present invention, in which the welding portion between the square tube portion 32 and the flange plate 33 is present at an intermediate position other than both ends of the square tube portion. There is. Also, the welding of the welding portion at the intermediate position can be easily handled only by the horizontal movement of the work rotating mechanism and the operation of reversing the direction of the welding torch.

[0031]

According to the box flange welding apparatus of the present invention, by providing the horizontal moving means of the work rotating mechanism and the reversing means for reversing the direction of the welding torch, each box flange of the work at a predetermined position is welded. Also in this case, it is possible to easily cope with it by simply moving the work rotating mechanism horizontally and reversing the direction of the welding torch, and it is now possible to provide a box flange welding device that is more suitable for automation of welding work. .

Further, since it is not necessary to change the direction of the work piece by means of the lifting mechanism, it does not take any trouble to prepare for welding, and a production system suitable for mass production can be prepared.

[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 a side view of FIG.

FIG. 3 is an enlarged side view of a main part.

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 an enlarged view of a main part for explaining another embodiment of the box flange welding apparatus of the present invention.

FIG. 7 is a perspective view of an applied portion of a box flange.

[Explanation of symbols]

 11 Base 12 Supports 13 Guide rails 14 Hangings 15 Side rails 16 Slides 17 Sensors 18 Welding torches 21 Brackets 22 Rotating shafts 23 Reversing means 24 Horizontal moving cylinders 25 Horizontal arms 26 Housings 27 Guide rollers 31 Support arms 32 Square tubes 33 Flange plate 34 Work rotation mechanism 35 Control panel 36 Welding unit 37 Welding power source 38 Carbon dioxide gas cylinder 39 Wire supply device 41 Remote controller 42 Monitor personal computer 43 Printer 51 Slide rail 52 Support base 53 Slide roller 54 Stopper

Claims (2)

[Claims] 1. A work rotating mechanism for rotating a work having a welded portion at a predetermined position in the length direction with the center line of the work oriented in the horizontal direction, and a work rotation mechanism held at a predetermined distance from the work, Also, in a box flange welding device equipped with a welding torch that can be weaved in the horizontal direction, a moving mechanism that holds the work rotating mechanism movably along the length direction of the work and a welding torch for welding each welding site. A box flange welding device having a reversing mechanism for reversing the direction. 2. The box flange welding apparatus according to claim 1, wherein the reversing mechanism for reversing the direction of the welding torch comprises a rotating mechanism rotated by a rotating shaft that is perpendicular to the center line of the work.