JPH01241383A - Rotary arc welding torch - Google Patents

Abstract

PURPOSE:To allow the title torch to carry out revolving motion by providing a second annular member with its angle of rotation adjustable on the same axis as a rotary first annular member and providing a third annular member with its angle of rotation adjustable eccentrically from its axial center and providing a circular hole eccentrically from its axial center to insert the torch into the circular hole. CONSTITUTION:When a driving cylinder 6 is rotated via gears 9 and 8 by a motor 8, a torch nozzle 1 is rotated eccentrically by an automatic aligning bearing 15 by the quantity of eccentricity of the center B of the circular hole 12a with respect to the rotating axial center 0. Since the torch nozzle 1 is supported on the rotating axial center 0 by a different automatic aligning bearing 4 above, it carries out the revolving motion by eccentric rotation with a supporting part by said automatic aligning bearing 4 as a fulcrum to obtain a rotating arc at a high speed. Accordingly, the quantity of eccentricity can be adjusted variably only by operating the second and third annular members 11 and 12.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to rotating arc welding 1. In the staggered rotating arc welding method, the molten metal is dispersed appropriately by centrifugal force to form a flat bead, and deep melting is prevented. Since no welding occurs, high-speed welding without welding defects is possible.

Conventional torches used for such rotary arc welding have a circular hole eccentric to the rotational axis of a rotating member, and a chia nozzle is inserted into the circular hole, and a chia nozzle is inserted into the circular hole by the rotation of the rotating member. -1 by slowing down the nozzle
- The arc at the tip of the chia nozzle is moved around the rotation axis.

Generally, in this type of rotating arc welding, the rotational speed of the arc is constant, which is convenient for electrically monitoring or controlling the welding conditions in response to the position of the helical trajectory of the arc point on the welding groove surface. Depends on something.

Incidentally, the amount of eccentricity of the rotating arc directly affects the centrifugal force acting on the arc at a constant rotation speed, and therefore, the amount of eccentricity is variably adjusted as one of the parameters for adjusting penetration depending on the welding weight. What is required of the m-structure of 1.-chi.

Conventionally, this variable adjustment of the amount of eccentricity has been carried out by preparing and replacing rotating members with different amounts of eccentricity, or by changing the distance from the fulcrum of the 1i grinding motion to the rotating member.

[Problem to be solved by the invention]

In the method of preparing and replacing rotating parts with different amounts of eccentricity, not only do you have to disassemble and reassemble the device each time, but you also have to disassemble and reassemble the device each time. There is a problem in that the relative relationship between the directional position and the rotational angular position of the rotary drive 81 structure collapses every time it is disassembled and reassembled, causing the aforementioned synchronization of the monitoring and control of welding conditions to deviate. The method of changing the distance to the rotating member has the problem that the mechanism becomes complicated.

The object of this invention is to eliminate the need for disassembly and reassembly, and to easily reproduce the relative relationship between the directional position on the helical locus of the arc point on the weld groove surface and the rotational angular position of the rotational drive mechanism. Moreover, it is an object of the present invention to provide a rotary arc welding device 1.--chi which has a simple structure and can easily and variably adjust the amount of eccentricity.

[Means to solve the problem]

In this invention, the torch nozzle is formed by inserting the nozzle 7L into the circular hole of a rotary member having a circular hole eccentric with respect to the rotation axis, and causing the torch nozzle to perform a sliding motion by the rotation of the rotary member. In rotary arc welding 1--ch, in which the arc at the tip is linked to revolve around the rotation axis, the rotating member is connected to a first annular member that is rotationally driven from the outside, and a rotation axis of the first annular member. a second annular member attached to the first annular member so that the relative rotation angle can be adjusted coaxially with the first annular member; The above object is achieved by mainly comprising a third annular member attached to an annular member, and the circular hole is provided eccentrically from the axis of the third annular member.

[Effect]

In rotating arc welding 1--H of the present invention, when the third rotating member is rotated by a desired angle relative to the second rotating member, the circular hole provided eccentrically in the third rotating member 1ζ is opened. The amount of eccentricity of the first rotating member with respect to the rotation axis changes,
This allows the radius of rotation of the arc to be adjusted steplessly. In this case, the rotational adjustment moves the rotational angular position of the circular hole with respect to the first rotating member, but this is because the second rotating member and the third rotating member are integrally moved relative to the first rotating member. By returning the desired angle in the opposite direction, it can be adjusted to the original angular position.

〔Example〕

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

FIG. 1 shows rotating arc welding 1 according to an embodiment of the present invention.
FIG. 2 is an explanatory view showing, in an enlarged manner, the relationship between the axes of the respective annular members in the direction of the arrows ``--'' in FIG. 1.

Figure 1. =, 1 is 1-chi of water-cooled salmon soto structure,
This is a nozzle, into which the welding wire 2 is passed from the upper part, protrudes from the lower end, and is supplied to the welding part. The nozzle 1 is supported by a self-aligning bearing 4 with respect to the block 3, and this self-aligning bearing 4 serves as a fulcrum for interlocking the pestle. 1.-The block 3 includes annular bearings 5n, 5.
The rotary drive cylinder 6 is rotatably supported by b,
The torch nozzle 1 passes through the drive cylinder 6. Drive cylinder 61. It has a gear 7 in its G1 portion, which is rotated by an output gear 9 of a drive 8 fixed to the block 3. 10 is a glue as a first annular member integrally provided at the lower end of the drive tube 6;
It has a circular inner circumferential wall 10z+ concentric with the 0-rotation axis O. Inside this ring 10, as a second annular member, there is an intermediate ring 11 that fits snugly into the circular inner circumferential wall 10a.
is fitted, and relative rotation between the two is possible only when the set screw 13 is loosened. Intermediate eccentric ring 11
has an inner hole 11a (the center is indicated by A) which is eccentric from the center (located on the rotational axis O) by a distance ia. Inside this intermediate eccentric ring 11, an inner centering ring 12 is fitted as a third annular member into which the eccentric inner hole 11al; This is possible only when you loosen the .

The inner centering ring 12 has a circular hole 12a (the center of which is indicated by B) which is eccentric by a distance from its center A, and a self-aligning bearing 15 is provided in the circular hole 12a to accommodate the above-mentioned one.
-1J in which the nozzle 1 is held relatively rotatable.In the rotating arc welding 1-1 with such a configuration, the drive cylinder 6 is rotated by the motor 8 via the gears 9, 8, and the rotation axis 0 is set. 5) - The chia nozzle 1 is eccentrically rotated, and the torch nozzle 1 is placed on the rotation axis O by another self-aligning bearing 4 above. Since it is supported, the grinding motion by the eccentric rotation is performed using the support provided by the self-aligning bearing 4 as a fulcrum. As a result, the arc generated from the wire at the tip of the torch nozzle 1 revolves around the rotation axis 0,
A rotating arc at high speed can be obtained.

The rotation diameter of the rotating arc is shown in Figure 2 between the rotation axis O and the circular hole 12.
It is determined by the distance between a and the center B. Adjustment of this amount of eccentricity is performed as follows.

That is, first, the set screw 14 is loosened, and the inner eccentric ring 12 is rotated by a desired angle θ relative to the intermediate eccentric ring 11, as shown in FIG. As a result, the center of the circular hole 12a, which was at point B in FIG. 2, moves to point C, and the original eccentricity (0
8) is adjusted to the new eccentricity 1 (distance between 00). After that, tighten stopper O 1 14 ('J nog 1
After preventing relative rotation between 1 and 12, loosen the setscrew 13 and attach these rings 11 and 12 to the integrated IC ring 1.
Rotate relative to 0 in the opposite direction. The amount of return of this rotation is the angle α in FIG. 2, that is, the angle between point C and point 0. As a result, the center position of the circular hole 12A around the rotation axis O remains in the same direction (3 o'clock direction in Fig. 2) before and after adjusting the eccentricity, and even after adjusting the eccentricity, the center position of the circular hole 12A remains on the welding groove surface. In this case, the relative relationship between the directional position of the arc point j on the spiral locus and the rotational angular position of the rotary drive mechanism does not collapse.

In the illustrated embodiment, the eccentricity a of the inner hole 11a of the intermediate eccentric ring 11 and the circular hole 1 of the inner eccentric ring 12 are
The relationship between 2a and eccentricity ib is, for example, a=b. In this case, the combined eccentricity, that is, the circular hole 12 with respect to the rotation axis O
The amount of eccentricity at the center of a varies from zero (that is, no eccentricity) to 2a (=
Tsukasa: ¥ can be adjusted within the range of 2b). In principle, the minimum eccentricity is b - a (however, b≧0), and the maximum wheel center is N (so a).

〔Effect of the invention〕

As described above, according to the present invention, the amount of eccentricity can be variably adjusted by simply operating the set screw and the eccentric ring, and there is no need for disassembly and reassembly. The relative relationship between the directional position of the point on the helical locus and the rotational angular position of the rotary drive mechanism can also be maintained the same before and after adjusting the amount of eccentricity.

[Brief explanation of the drawing]

FIG. 1 shows rotating arc welding 1 according to an embodiment of the present invention.
- A longitudinal cross-sectional view showing the main parts of the
II is an explanatory diagram showing, in an enlarged manner, the correlation between the axes of each annular member in the direction of the line arrows. . 1: )・-chi nozzle, 2: welding wire, 3: l・-ti block, 4. ．． 15: self-aligning bearing, 6-rotation drive tube, 7, 9: gear, 8: motor, 10: ri. ge (first annular member), 11: intermediate eccentric ring (second
Im-shaped member), 12: Inner side center (first annular member), 12a: circular hole, 13, 14: 11th hole
character .

Claims (1)

[Claims] A torch nozzle is inserted into a circular hole of a rotating member having a circular hole eccentric with respect to the rotation axis, and the arc at the tip of the torch nozzle is caused to move by sliding the torch nozzle by rotation of the rotating member. In the rotary arc welding torch that rotates around the rotation axis, the rotating member has a first annular member that is rotationally driven from the outside and a relative rotation angle coaxially with the rotation axis of the first annular member. a second annular member adjustably attached to the first annular member; and a third annular member attached to the second annular member adjustably relative rotation angle about an axis eccentric from the rotational axis. A rotary arc welding torch comprising: an annular member; wherein the circular hole is provided eccentrically from the axis of the third annular member.