JPH0333062B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to a single or multiple long board material, particularly a long board material having creases at random positions at the ends in the width direction, on the top surface of the panel material. A welding method and automatic welding device for welding the entire periphery of the contact area, including square welding at the start and end of welding and at the cut areas where the two do not contact, when welding so that the width direction is perpendicular. Regarding.

(Prior Art) For example, as a small assembly operation in shipbuilding, one edge of a long plate material with an L-shaped cross section called a longitudinal material is sometimes overlay-welded on the surface of a panel material.

Conventional welding for this type of work includes gravity welding using an electric arc rod, CO2 semi-automatic welding, and submerged arc automatic welding. Among the above, gravity welding is particularly frequently used because it allows one worker to operate several gravity welding machines and is highly efficient.

(Problems with the prior art) Since gravity welding uses a welding rod of a certain length, there is always some welding left over the welding length of the longitudinal material, and the longitudinal material has a panel material called a drain hole. There is a cut part where there is no contact between the two ends, and corner welding cannot be performed at both ends of the longitudinal material and both ends of the above cut part, and these places are left behind after the gravity welding. It is essential to perform welding rework during the process, which has the disadvantage of being labor-intensive and time-consuming.

In addition, the CO2 semi-automatic welding described above cannot operate only one arc per worker, is not efficient even if a simple automatic welding machine is used, and, like the gravity welding described above, leaves unwelded parts, so it is difficult to perform post-processing. As a result, the welding had to be reworked.

With conventional submerged arc welding, it is possible to perform fillet welding on both sides of the abutment area between the panel and longitudinal material at the same time, but it is not possible to perform square welding on both ends of the longitudinal material and the cut area, and welding rework is required in a post-process. It was.

(Objective of the Invention) The present invention provides a method for welding a long plate material, such as a longitudinal material, to the top surface of a panel so that the width direction is almost perpendicular, especially when there is a cut part where the panel and the plate material do not come into contact. This was done to solve the above-mentioned problems with conventional welding methods and welding equipment, regardless of the number of plates to be welded.
Without any labor-intensive or time-consuming post-processing, the entire periphery of the contact area between the panel and the long plate material, including square welding at both ends and the cut area, can be welded during one movement process. An object of the present invention is to provide a welding method and an automatic welding machine that can automatically and reliably weld.

(Structure of the first invention) The structure of the first invention of the present application is as follows: (1) A long plate material having a predetermined crease on the end surface in the width direction is temporarily erected on the upper surface of the panel material so that the width direction is substantially perpendicular. , when fillet welding the abutting portions of both using movable coaxial twin arrangement welding torches, (2) moving each of the above welding torches parallel to the plate from one end to the other in the longitudinal direction; (3) The welding torch is stopped at the start and end of welding and in the cut areas where the two do not contact each other, and the weld metal is brought together to perform square welding. The welding method is characterized in that the entire periphery is welded.

(Function of the first invention) The first invention of the present application performs square welding by bringing the weld metal together with a movable coaxial twin-arranged welding torch stopped at the start and end of welding and at the cut portion. It has the effect of welding the entire periphery of the joint.

(Configuration of the second invention) The configuration of the second invention of the present application for carrying out the first invention is as follows: (1) A gate-type or ceiling-traveling main bogie on which the welding machine main body is mounted and which straddles the material to be welded; A transverse bogie mounted on the main girder of a bogie and movable in a direction perpendicular to the running direction of the main bogie, a slave bogie mounted on the transverse bogie and movable in a direction along the running direction of the main bogie, and a slave bogie that hangs downward from the slave bogie. It consists of a vertical scanning slider and a left/right scanning slider that are connected in series, and a welding torch in a coaxial twin arrangement installed at the bottom of the horizontal scanning slider located below. It is characterized by being equipped with a welding line tracing mechanism including a detector, and a welding start/end and cut part detector, and (3) the positions of the main bogie, traversing bogie, slave bogie, and welding torch are set to be controllable. Automatic welding equipment with

(Operation of the second invention) The second invention of the present application provides a main bogie that can run in a predetermined direction, and a Y axis when the running direction of the main bogie is the X axis.
A transverse truck that can move in the axial direction, a slave truck that can move in the The function of freely controlling the position of a set of coaxial twin-arranged welding torches, in particular, when the main bogie is traveling in the +X-axis direction, each slave truck is individually moved in the -X-axis direction, and the welding torch installed on the slave truck is moved. The automatic welding function that leaves no welding residue is achieved by combining both of the above functions.

(Example) The present invention will be described in detail below according to an example automatic welding apparatus shown in FIGS. 1a to 1c.

In the figure, P is the panel material and L is the panel P.
It is a long board temporarily erected on top so that the width direction is almost perpendicular.

Reference numeral 100 indicates the entire automatic welding apparatus according to the embodiment, and 1
is a gate-shaped main bogie that can run in the direction indicated by the arrow X on the rails 11 so as to straddle the workpiece made of the panel material P and the plate material.

The main truck 1 includes a welding power source E, a cooling water circulator C,
Equipped with the main body of the welding machine, including gas control panel Gc, main control/operation panel MC, etc. Furthermore, in order to ensure stable welding travel, it is appropriate for the main truck 1 to travel by a pinion-rack drive system in which a pinion of a drive device (not shown) meshes with a rack R attached to the side surface of the rail 11.

In the embodiment, two transverse bogies 2 are mounted on the main girder 12 of the main bogie 1, and are movable along the main girder 12 in the direction of the arrow Y orthogonal to the running direction X of the main bogie 1. . Each traversing truck 2 is equipped with a slave truck 3, which is movable within a predetermined length range in the same direction as the main truck 1, as shown by an arrow X.

On the above-mentioned traversing truck 2, for example, an electrically driven vertical scanning slider indicated as 4 is disposed so as to hang down, and is movable in the direction of arrow Z. Further, a left-right copying slider 5, which is also electrically driven, is connected and arranged at the lower end of the vertical copying slider 4.
It is movable in the Y direction.

Coaxial twin welding torches T1 and T2 are attached to the left and right sliders 5 via a wire feeding device 6 and an electrically driven welding head adjustment slider 7, respectively. An arm A is disposed at a predetermined position of the welding head adjustment slider 7, and a contact type weld line tracing detector 8 and a non-contact type A cut portion detector 9 is held.
The probe of the welding line tracing detector 8 is movable, and the probe can be retracted from the welding position except during welding.

The device 100 of this embodiment detects the traveling distance or traveling speed using a traveling distance detection mechanism or a traveling speed detecting mechanism (not shown) provided in the drive section of the main bogie 1, such as a rotary encoder or a tachometer generator, and detects the traveling distance or traveling speed when moving. The preceding cut portion detector 9 detects the cut portion, measures the distance or time required for the following welding torch T to reach the cut portion, and then detects the cut portion. After a predetermined distance or time after detecting the cut area, that is, when the welding torch T reaches the cut area, the arc of each welding torch T is stopped individually, or the weld metal is brought together to perform square welding, or even conventional welding. It is set to perform welding control and position control of the welding torch T, such as starting the reverse movement of the truck 3 at the same speed as the traveling speed of the main truck 1 and performing square welding.

Furthermore, the traversing truck 2 is equipped with a plurality of pack wires Pw and a welding fume suction device Hd.
Equipped with equipment that allows continuous welding for long periods of time.

Further, CB1 is a cable bear related to the main bogie 1, and CB2 is a cable bear related to the traversing bogie 2.

Using the above-mentioned embodiment device, as shown in FIG.
1, multiple plate materials L1, L2 with H2 and panel P
In the case where the side periphery of the abutting portion is welded at the same time, the operation will be explained below with reference to FIGS. 3a to 3c.
However, FIG. 3 shows the positional relationship of the coaxial twin welding torches T1 and T2 with respect to one plate L on the panel P, and unless otherwise specified, the welding torches installed on each of the plurality of transverse carts 2 are shown. It is assumed that the mechanisms operate in the same way.

Before starting welding, the vertical and horizontal scanning sliders 4 and 5 are respectively driven to displace the welding torches T1 and T2 upward so that they do not contact the plate material L, and to keep them separated from each other, as shown in FIG. 3a. The main truck 1 and the traversing truck 2 are moved and positioned above the welding start position shown as A in FIG. 2.

First, the vertical scanning slider 4 is driven to displace the welding torches T1 and T2 downward as shown in FIG. 3b, and the welding head is positioned for rough adjustment.

Next, the position of the welding line tracing detector 8 is adjusted, and the welding head adjustment slider 7 is operated according to the tracing signal outputted by the welding line tracing detector 8, and the welding torch is adjusted as shown in FIG. 3c. T
1 and T2 in the direction toward each other and position them at the welding line starting end A.

In this state, the welding line tracing detection mechanism is locked, the probe of the welding line tracing detector 8 is retracted, and the welding metal is brought together by the welding torch T, which is in an immovable position, to perform square welding at position A. do.

When the square welding at position A is completed, the main bogie 1 starts moving in the welding direction, that is, the +X direction, and while moving, the welding torches of Group A and Group B are
TA1, TA2, TB1, and TB2 are the abutting parts of panel P and plate L1 between E-E and plate L, respectively.
Fillet weld the peripheries on both sides between the two abutting parts E and E'.

When the welding torches TA1 and TA2 of group A are welding between contact parts E and R, when the cut part detector 9 detects one end of the cut part H1, after a predetermined distance or time, that is, the welding torch Upon arrival at position B, the slave truck 3 starts moving in the opposite direction, that is, in the -X direction, at the same speed as the main truck 1. Therefore, although the main bogie 1 continues to travel in the +X direction, the slave bogie 3 will maintain an absolute stop state with respect to the panel P, and the corner welding at position B will be performed in this absolute stop state. be exposed.

During corner welding at the B position, as shown in Fig. 2, the positions of the cut parts H1 and H2 are different between the plates L1 and L2, and the welding torch TB of group B is
1, TB2 does not detect the cut portion H2, and therefore follows the movement of the main bogie 1 in the +X direction and continues fillet welding.

When the corner welding at the one end position of the cut portion H1 is completed, the arc of the welding torches TA1 and TA2 is stopped, and at the same time, the movement of the slave truck 3 in the -X direction is stopped, and the welding torches TA1 and TA2 are stopped.
follows the movement of the main bogie 1 and moves in the +X direction.

When the cut portion detector 9 preceding the welding torches TA1 and TA2 detects the position of the other end of the cut portion H1, after a predetermined distance or time, that is, when the welding torch reaches the position C, the slave truck 3 Again-
Starts movement in the X direction, and -X of the slave truck 3
When the welding torches TA1, TA2 are at an absolute stop with respect to the panel P due to movement in the direction, corner welding at the C position is performed in the same manner as at the B position. During the square welding, the welding torches TB1 and TB2 of group B continue to perform fillet welding while traveling as described above.

When the corner welding at position C is completed, the slave truck 3
The welding torch stops moving in the -X direction.
TA1 and TA2 start moving in the +X direction following the main truck 1 and perform fillet welding between the harnesses.

While the welding torches TA1 and TA2 of group A are welding between the hone and the hone, the welding torches TB1 and TB2 of group B square the a' position and the c' position by the same operation as mentioned above for the cut part H2. weld,
Next, perform fillet welding between the holes.

Due to the above, welding torch TA1 of both sets A and B,
TA2, TB1, and TB2 are lined up, so they reach the two welding end positions at the same time, the main bogie 1 is stopped, and the welding torch T
2-position square welding is performed, whereby the sides of the abutting portions of the plurality of plate materials L and the panel material P are completely welded.

Thereafter, the welding torch T is brought into the state shown in FIG. 3a and moved to the next welding position.

In the above operation explanation, welding torches T of both sets A and B are
Each has one cutout part H1 at a different position.
Although the explanation has been given on the case where plate materials L1 and L2 with H2 and H2 are welded with panel material P, even when welding three or more plate materials L with two or more cut parts H, each weld There is no difference in the operation of the torch T simply by repeating the above example, and it is only necessary to increase the possible movement distance range of the slave truck 3.

Also, if the lengths of the plates L1 and L2 are different,
It operates in the same way as square welding of the cut part, and there is no difference except that the welding torches TA1, TA2 and TB1, TB2 are individually arc-off.

(Effects of the Invention) According to the present invention, when welding a long plate material to the top surface of a panel material so that the width direction is perpendicular, especially when there is a cut part where the panel and the plate material do not come into contact,
Regardless of the number of plates to be welded, the entire periphery of the contact area between the panel and the long plate can be automatically welded without any manual effort, including square welding of both ends and cut areas. It was awarded for its ability to reliably weld, contributing greatly to labor savings and high efficiency.

[Brief explanation of drawings]

Figures 1a and b are respectively a top view and a front view of an apparatus according to an embodiment of the present invention, Figure 1c is a side view of the main part in Figure 1b, and Figure 2 is a schematic diagram of a workpiece to be welded by the present invention. A perspective view of the welding torch and FIGS. 3A to 3C are front views schematically showing the operation of the apparatus according to the present invention, respectively. P...Panel material, L...Plate material, T, T1, T2
... Welding torch, H ... Cutting section, 100 ... Automatic welding device, 1 ... Main bogie, 12 ... Main girder, 2 ...
...traversing truck, 3...follower cart, 4...vertical copying slider, 5...left and right copying slider, 8...welding line copying detector, 9...cut portion detector.

Claims (1)

[Scope of Claims] 1. A long plate material having a predetermined score on the end surface in the width direction is temporarily erected on the upper surface of the panel material so that the width direction is almost perpendicular, and the abutment part of both is movable coaxially. When fillet welding is performed using twin welding torches, each of the welding torches is moved parallel to the plate from one longitudinal end to the other during fillet welding. The welding method is characterized in that the welding torch is stopped in the cut area where the metal parts are not in contact with each other, and the weld metals are brought together and square welding is performed to weld the entire periphery of the contact part. 2. When welding multiple plates and panel materials with different positions of the cut parts using multiple sets of welding torches, each set individually reaches the cut parts while moving and performs square welding. 2. The welding method according to claim 1, wherein the stopped state of the welding torch is created by moving the welding torch in the opposite direction at the same speed as the other set that continues to move. 3 A gate-type or ceiling-traveling main bogie that carries the welding machine body and straddles the material to be welded, a transverse bogie that is mounted on the main girder of the main bogie and is movable in a direction perpendicular to the running direction of the main bogie, and a transverse bogie that A sub-bogie mounted on the main bogie and movable in a direction along the running direction of the main bogie, a vertical copying slider and a left-right copying slider connected in series so as to hang down from the sub-bogie, and a left-right copying slider located below the above-mentioned. It consists of a welding torch in a coaxial twin arrangement attached to the lower part of the slider, a welding line copying mechanism including a welding line copying detector, and a welding start/end and cut part detector. An automatic welding device characterized in that the positions of a truck, a slave truck, and a welding torch are set to be controllable. 4. The automatic welding device according to claim 3, wherein a plurality of transverse bogies are mounted on the main girder of the main bogie, and each of the transverse bogies is provided with a coaxial twin arrangement welding torch mechanism for the subordinate bogies and below.