JPH08141742A - Weaving device for automatic arc welding - Google Patents

Abstract

PURPOSE: To provide an automatic arc welding equipment which is small and simple in structure and achieves the high speed weaving by providing a weaving width adjusting mechanism in a crown type weaving equipment. CONSTITUTION: When a rotor 30 is rotated in a housing 20, a second slider 80 fitted to the other end part of the rotor 30 through a guide 70 is rotated, and an eccentric pin 84 provided on the other end part is turned around the center axis of the rotor 30. A connection rod 90 is reciprocated in the axial direction, and a welding torch achieves the weaving. A first slider 50 in the rotor 30 is moved in the direction of the center axis of the rotor 30 by a position adjusting mechanism 60. The second slider 80 is moved in the direction orthogonal to the center axis of the rotor 30 by being guided by a guide groove 53 of the first slider 50. The distance from an eccentric pin 84 to the center of rotation is changed to adjust the weaving width.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weaving device for weaving a welding torch used for automatic arc welding, and more particularly to a mechanical weaving device, particularly a crank weaving device.

[0002]

2. Description of the Related Art Weaving devices for automatic arc welding are
It is roughly classified into an electromagnetic type and a mechanical type, but in general, the electromagnetic type is often used. However, the electromagnetic weaving speed is 10
It is about 20 Hz, and it is becoming difficult to cope with the recent increase in welding speed. In this respect, a mechanical type, particularly a crank type weaving device is capable of high speed weaving because of its simple mechanism and small inertia. Therefore, it can be said that the crank type is preferable from the viewpoint of high-speed weaving. As a conventional crank type weaving device, those proposed by JP-A-57-21484 and JP-A-6-66867 are well known.

[0003]

However, since the weaving device proposed by Japanese Patent Laid-Open No. 57-21484 only reciprocates the rod in the axial direction by simply rotating the eccentric pin, the weaving width is adjusted. Can not do it.

On the other hand, in the weaving device proposed by Japanese Patent Laid-Open No. 6-66867, the weaving width can be adjusted for the time being. However, by swinging the rod in a seesaw type and changing the position of the swing fulcrum,
Since the weaving width is adjusted, there is a problem that the device becomes large and complicated. In addition, the merit of high-speed weaving may be hindered due to the problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a crank type weaving device capable of high-speed weaving and adjusting the weaving width, and having a small size and a simple structure.

[0006]

A weaving device of the present invention comprises a housing installed near a welding torch of an automatic arc welding device, a sleeve-shaped rotor rotatably supported in the housing, and a rotor for driving the rotor. Drive mechanism attached to the housing for moving the rotor, a first slider housed in the rotor movably in the central axis direction of the rotor and having a guide groove inclined with respect to the central axis of the rotor, and one end side of the rotor A position where the first slider is inserted into the housing by penetrating through the housing, the tip end of which is rotatably connected to the first slider to hold the first slider, and the holding position of the first slider is adjusted by axial movement. The adjusting mechanism, a guide attached to the other end of the rotor at right angles to the central axis of the rotor, and one end of which engages with the guide Engages the de groove, and a second slider parallel eccentric pin to the center axis of the rotor is provided on the other end,
And a connecting rod having one end rotatably connected to the eccentric pin of the first slider and the other end directly or indirectly connected to the welding torch.

[0007]

When the rotor is rotated in the housing, the second slider attached to the other end of the rotor via the guide rotates, and the eccentric pin provided at the other end turns about the center axis of the rotor. . As a result, the connecting rod reciprocates in the axial direction, and the welding torch weaves. Here, the position adjusting mechanism moves the first slider in the rotor in the central axis direction of the rotor. Then, guided by the guide groove of the first slider, the second slider moves in a direction perpendicular to the central axis of the rotor. As a result, the distance from the eccentric pin to the center of rotation changes, and the weaving width is adjusted. Since the first slider in the rotor is connected to the rotor via the second slider and the guide, it rotates together with the rotor. Since the position adjusting mechanism is rotatably connected to the first slider, it does not hinder its rotation.

[0008]

The present invention will be described in more detail below with reference to the embodiments shown in the drawings.

FIG. 1 is a plan view showing the appearance of an example of a weaving device embodying the present invention, and FIG.
-A line arrow view, FIG. 3 is a BB line arrow view of FIG. 2, FIG. 4 is a C-C line arrow view of FIG. 3, and FIG. 5 is a D-D line arrow view of FIG. .

As shown in FIGS. 1 and 2, the weaving device comprises a housing 20 which is screwed to the surface of a horizontal substrate 10 with its central axis oriented horizontally.
The housing 20 is a sleeve whose head surface is closed and whose bottom surface is open.

As shown in FIGS. 3 and 4, a cylindrical rotor 30 is concentrically and rotatably housed and held inside the housing 20 via a plurality of bearings 31, 31. Further, the rotor 30 is provided on the outer surface of the housing 20.
A drive mechanism 40 for rotationally driving the is attached.

The drive mechanism 40 comprises a motor 41 and two gears 42 and 43. The gear 42 of the first stage is the motor 4
1 is connected to the output shaft. The second gear 43 is 1
The gear 42 meshes with the gear 42 of the stage and also meshes with the gear portion 32 provided on the outer peripheral surface of the rotor 30. Accordingly, when the motor 41 operates, the rotation is transmitted to the gear portion 32 of the rotor 30 via the gears 42 and 43, and the rotor 30 rotates in the housing 20.

A first slider 50 having a piston-like shape is housed in the rotor 30 concentrically and movably in the central axis direction. The head portion of the first slider 50 is a column portion 51, and the bottom portion is a fin portion 52 extending from the column portion 51. The fin 52 has a center axis of 45
A guide groove 53 inclined at an angle of ° is formed so as to penetrate the fin portion 52. Then, the first slider 50
The position of the shaft is adjusted by a position adjusting mechanism 60 attached to the head portion of the housing 20 in the axial direction.

The position adjusting mechanism 60 has a horizontal screw rod 61 screwed into the center of the head surface of the housing 20.
The bottom portion of the screw rod 61 is the cylindrical portion 5 of the first slider 50.
It is rotatably connected to the central portion of the bearing 1 through a plurality of bearings 62, 62. The first rod 50 is held in the rotor 30 by the screw rod 61. In addition, by rotating the screw rod 61 and changing the screwing amount, the first
The slider 50 moves axially within the rotor 30, and its axial position is adjusted.

As shown in FIGS. 4 and 5, the bottom surface of the rotor 30 has a pair of Ls with the central axis of the rotor 30 interposed therebetween.
M guides 70, 70 are attached. The LM guides 70, 70 are at right angles to the central axis of the rotor 30, and the rail portions of the LM guides 70, 70 also serve to hold down the bearing 31.
It is screwed to the central fin portion 34 of the zero bottom plate 33.
Then, the LM guides 70, 70 guide the second slider 80 in a direction perpendicular to the central axis of the rotor 30.

The second slider 80 has a pair of side plates 81, 81 arranged with the central axis of the rotor 30 interposed therebetween. Each bottom part of the side plates 81, 81 is L
Located on both sides of the M guide 70, 70, the LM guide 70,
Associated with each of the 70 slide blocks. On the other hand, the head portions of the side plates 81, 81 are connected to the first slider 5 by
Pins 82 located on both sides of the fin portion 52 of 0 and penetrating the guide groove 53 provided in the fin portion 52 allow the first slider 5 to move.
It is connected to 0. As a result, when the first slider 50 in the rotor 30 moves in the central axis direction, the second slider 50
The slider 80 is guided by the guide groove 53 of the first slider 50 and the LM guides 70, 70 and moves in the direction perpendicular to the central axis of the rotor 30.

The bottom portions of the side plates 81, 81 are connected to each other by a bottom plate 83. An eccentric pin 84, which is parallel to the central axis of the rotor 30, is provided on the bottom surface of the bottom plate 83 so as to be offset from the central axis. Reference numeral 35 denotes a cap attached to the bottom plate 33 of the rotor 30 from the bottom side to rotate together with the rotor 30, and the eccentric pin 84 projects to the bottom side through a long hole provided on the bottom surface thereof.

To the eccentric pin 84, one end of a horizontal connecting rod 90 orthogonal to the central axis of the rotor 30 is rotatably connected. The other end of the connecting rod 90 is rotatably connected to one end of a horizontal spline shaft 91. The spline shaft 90 is movably supported in the axial direction by a block 92 screwed to the surface of the substrate 10. The other end of the spline shaft 91 is connected to a welding torch of an automatic arc welding device (not shown).

Next, the operation of the weaving device will be described.

When the motor 41 of the drive mechanism 40 is operated, its rotation is transmitted to the gear portion 32 of the rotor 30 via the gears 42 and 43, and the rotor 30 rotates. Rotor 30
When is rotated, the LM guide 7 attached to its bottom surface
0 and 70 rotate, which causes the second slider 80 to rotate. As a result, the eccentric pin 84 pivots around the central axis of the rotor 30, and the connecting rod 90 and the spline shaft 91 reciprocate in the axial direction. Thus, the cranking type welding torch weaving operation is performed. The reason why the connecting rod 90 is not directly connected to the welding torch but the spline shaft 91 is interposed therebetween is to prevent the welding torch from swinging and to suppress variations in the bead shape to improve the welding performance.

When the second slider 80 rotates, the first slider 50 connected to it also rotates. Therefore, the first slider 50 in the rotor 30 also rotates with the rotor 30. That is, the rotor 30, the first slider 50, and the second slider 80 rotate synchronously. Position adjustment mechanism 60
Since the bottom portion of the threaded rod 61 is rotatably connected to the first slider 50, does not hinder the rotational movement of the first slider 50.

By operating the screw rod 61 of the position adjusting mechanism 60,
When this is moved in the axial direction, the first slider 50 in the rotor 30 moves in the axial direction. Then, the pin 82 of the second slider 80 moves in the direction perpendicular to the central axis of the rotor 30 by being guided by the guide groove 53 formed in the fin portion 52 of the first slider 50 in an inclined manner. That is, the second slider 80 is guided by the LM guides 70, 70 and moves in the direction perpendicular to the central axis of the rotor 30. As a result, the distance from the eccentric pin 84 to the center axis (rotation center) of the rotor 30 changes, and the weaving width of the welding torch is adjusted.

A mechanism for adjusting the weaving width (first slider 50, LM guides 70, 70 and second slider 80) is provided from the inside of the rotor 30 to the bottom side thereof and is concentrated around the center of rotation. , The inertia is small, and the merit of high speed weaving by the crank type is not hindered.

[0024]

As described above, since the weaving device of the present invention is of the crank type, it is possible to perform high-speed weaving, which contributes to speeding up of automatic arc welding.
Despite the crank type, the weaving width can be adjusted. Regarding the weaving width adjustment mechanism, the two sliders are linked and interlocked via the slanted guide groove so that the mechanism is concentrated around the rotation center, so that the weaving width adjustment mechanism is compact and simple. Since it does not increase, it does not hinder fast weaving.

[Brief description of drawings]

FIG. 1 is a side view showing the appearance of an example of a weaving device embodying the present invention.

FIG. 2 is a view taken along the line AA of FIG.

FIG. 3 is a view taken along line BB of FIG. 2;

FIG. 4 is a view taken along line CC of FIG.

5 is a view taken along the line DD of FIG.

[Explanation of symbols]

 10 substrate 20 housing 30 rotor 40 drive mechanism 50 first slider 53 guide groove 60 position adjusting mechanism 70 guide 80 second slider 84 eccentric pin 90 connecting rod

Claims (1)

[Claims] 1. A housing installed near a welding torch of an automatic arc welding apparatus, a sleeve-shaped rotor rotatably supported in the housing, and a drive mechanism attached to the housing for rotationally driving the rotor. A first slider housed in the rotor so as to be movable in the direction of the center axis of the rotor and having a guide groove inclined with respect to the center axis of the rotor; and a first slider that penetrates the housing from one end side and is inserted into the housing. A position adjusting mechanism whose tip is rotatably connected to the first slider to hold the first slider, and which adjusts the holding position of the first slider by axial movement, and is attached to the other end of the rotor. A guide that is perpendicular to the center axis of the rotor and that engages with the guide,
A second slider having one end engaged with the guide groove of the first slider and the other end provided with an eccentric pin parallel to the center axis of the rotor, and one end rotatably attached to the eccentric pin of the first slider. A weaving device for automatic arc welding, comprising a connecting rod connected to the welding torch, and the other end of which is directly or indirectly connected to the welding torch.