KR20030093730A - Rotating Weaver Torch to Use Separated Shaft - Google Patents

Abstract

PURPOSE: An eccentric shaft rotating torch is provided to improve weldability and productivity by reducing a crack when performing an arc welding work and increase welding speed. CONSTITUTION: A welding torch(24) is coupled to one side of a body(2). A weaving gear body(18) equipped with a weaving gear(17) is mounted on the welding torch(24). A driving gear(3) in the form of a spur gear is mounted on a DC servo motor(5), which is installed at an upper surface of the body(2), so that rotational force of the servo motor(5) is transferred to the welding torch(24) through the gear unit. Self-alignment bearings(15,15') are installed on an upper surface of the welding torch(24) and at a lower portion of the weaving gear body(18). Thrust force and centrifugal force derived from a rotation of an eccentric shaft are compensated by means of the self-alignment bearings(15,15').

Description

Rotating Weaver Torch to Use Separated Shaft

The present invention relates to an eccentric shaft circular torch, and more particularly, in a carriage automatic welding application using a carbon dioxide arc welding technique, the limitation of welding speed and welding conditions due to the generation of pore defects in the weld during high-speed fillet welding. It is a device developed to overcome the problem that the tip of the welding torch can be rotated at high speed during the welding process, and it stays inside the molten metal to reduce pore defects caused by the harmful gas generated by sintering the paint of the primer coated steel plate. Rotating and weaving the welding torch to allow gas to be released into the atmosphere, thereby fundamentally blocking the welding defects of the automatic welding execution part, and also to perform welding at high current and high voltage and high speed than the conventional welding conditions. To improve welding productivity A mandrel circular rotating torch.

In general, a carriage automatic welding device using a carbon dioxide arc welding technique is equipped with a carbon dioxide arc welding torch on a simple horizontal traveling bogie, and thus it is possible to continuously perform the work rather than manually performing carbon dioxide arc welding. Although the welding productivity could be increased, when the welding conditions were adjusted upward to perform the welding at high current, high voltage, and high speed, there were limitations in application due to excessive generation of defects in the generation of uneven weld beads and pore defects in the weld zone.

Conventional welding torches are fixed to one point on a bogie that automatically runs, and only a working angle between the welding portion and the welding torch can be adjusted during welding. In other words, the welding torch is configured to adjust the working angle around the fixed point, and to move the position of the welding torch through the front and rear movement device and the vertical movement device.

The construction of the welding torch as described above greatly contributed to the improvement of productivity due to the simple automated construction of carbon dioxide arc welding, but when the welding torch is applied over a certain welding condition (welding current, voltage, and traveling speed), the welding bead defect and the pore defect are excessive. There was a problem of generation. That is, if only welding speed is increased under the same welding conditions (welding current, voltage), the welding distance increases but the width of the beads decreases. If the welding conditions are adjusted upward during high-speed welding, the bead width decreases due to the increase of welding amount. Although it can be compensated for a certain level, the liquid molten metal flows out of the welded part to generate a lower angled sheet (or an inelastic angled sheet), and the gas in the molten metal becomes faster due to the faster solidification time of the molten metal during high speed welding. Due to the short discharge time to the atmosphere, it remains as a weld metal internal defect. Eccentric shaft circular rotation torch that can solve the above problems is a situation that is required.

The present invention is devised to solve the above-mentioned problems, high speed welding is carried out by using the rotational force of the motor by mounting a careful bearing on the upper and lower parts of the welding torch, but the driven shaft itself does not rotate. It is possible to improve the weld bead shape by maintaining a constant weaving width against the poor bead width generated at the time, and the wire tip which arc is generated in the weld pore defect caused by the harmful gas present in the welded part molten metal By rotating at high speed within the molten metal, pores generated in the molten metal can naturally escape out of the molten metal, thereby reducing the occurrence of pore defects in performing carbon dioxide arc welding, and simultaneously improving welding speed and reducing welding defects, thereby improving welding productivity. Eccentric shaft circle to help improve It is aimed at providing a rotary torch.

In order to provide the eccentric shaft rotational torch as described above, a welding torch is connected to one side of the main body, and a weaving gear body equipped with a weaving gear is mounted on the welding torch, and the spur gear is formed in contact with the weaving gear. The driving gear is mounted on the DC servomotor mounted on the upper surface of the main body body so that the rotational force of the DC servomotor is transmitted to the welding torch body by the gear device to rotate, and the upper portion of the welding torch and the lower portion of the inner surface of the weaving gear body are rotated. It is achieved by mounting the respective careful bearings to provide an eccentric shaft circular rotary torch in which the welding torch itself rotates only the tip of the welding torch by one of the careful bearings without rotating the welding torch itself.

Figure 1 shows a part connection assembly showing the internal component connection of the present invention.

<Description of the symbols for the main parts of the drawings>

(1): main body lower cover (2): main body

(3): Driving gear (4) (4 '): Bakelite for insulation

(5): DC servomotor (6): body case

(7): insulated box (8): wire entry connector

(9): Extension power cable upper terminal

(10): Flexible hose 11: Extension power cable

(12): Extension power cable lower terminal

(13) (19): Bushing 14: Bearing Case

15 (15 '): careful bearing 16 (16'): bearing

(17): weaving gear (18): weaving gear body

(20): Intermediate connection fitting (21): Insulator

22: nozzle 23: tip

24: welding torch 25: welding torch fixing nut

26: lower cover flange

Referring to the configuration of the present invention in conjunction with the accompanying drawings as follows.

1 is an exploded view showing the connection structure of the internal components of the present invention, in the automatic carriage welding device using a carbon dioxide arc welding method,

A DC servomotor (5) capable of adjusting the number of revolutions by an electrical signal having an insulating layer bakelite (4) mounted on both sides of the upper surface of the main body (2) using bolts is mounted.

The driving gear 3 is mounted below the rotating shaft of the DC servomotor 5 penetrating the upper surface of the main body 2.

One side of the driving gear 3 is mounted with a weaving gear 17 to form a spur gear with the driving gear 3.

The upper surface is protruded into the weaving gear 17, and the weaving gear body 18 is mounted on both sides of the weaving gear 17 using bolts.

The bearing 16 is mounted to smoothly transmit the rotational force to the upper outer surface of the upper weaving gear body 18 protruding from the upper surface of the weaving gear 17.

The bearing 15 'is inserted into the lower portion of the inner surface of the weaving gear body 18. The bushing 19 is inserted into the careful bearing 15 ′ to facilitate electrical insulation and rotational force transmission.

The bearing 16 'is inserted into the lower portion of the outer surface of the weaving gear body 18.

The lower cover 1 of the main body 2 is mounted on the lower surface of the main body 2 using a bolt.

A lower cover flange 26 is provided on the lower surface of the main body lower cover 1.

One side of the lower cover flange 26 is connected through the weaving gear 17, the weaving gear body 18, the careful bearing 15 ′, the body lower cover 1, and the lower cover flange 26. Insert and mount the welding torch 24 to protrude. The welding torch fixing nut 25 is fastened to the inside of the lower cover flange 26 to fix the welding torch 24. Mount the intermediate connection fitting 20 in the lower cover flange (3).

The insulator 21 is mounted under the intermediate connection fitting 20, and the nozzle 22 is mounted under the insulator 21.

The tip 23 is mounted on the lower end of the welding torch 24.

Fit the watch bearing (15) having an insulating bushing (13) inside the welding torch (24), and is installed on one side of the upper surface of the body body (2) to the outside of the watch bearing (15) Fit the bearing case (14) wrapped.

An insulating bakelite 4 'is mounted on the bearing case 14, an extension power cable lower terminal 12 is provided on the insulating bakelite 4', and the extension power cable lower terminal 12 is provided. The flexible hose 10 is provided on the upper portion of the flexible hose 10, and the extension power cable upper terminal 9 is provided on the flexible hose 10, and the extension power cable upper terminal 9 and the lower terminal 12 are provided. And an extension power cable (11) between the upper and lower surfaces of the bearing case (14) using bolts to mount the insulating box (7), and the wire inlet connector (8) to the upper surface of the insulating box (7). ), And the body case 6 to cover the outside of the insulating box 7 and the DC servo motor 5 and to protrude to the upper surface.

Referring to the configuration as described above the operation of the present invention.

The DC servomotor 5 may adjust the rotation speed according to the input power value. The rotational force of the DC servomotor 5 adjusted as described above is first transmitted to the driving gear 3 connected to the central axis of the lower portion of the DC servomotor 5 to rotate the driving gear 3. The rotational force transmitted to the driving gear 3 is secondly transmitted to the weaving gear 17 connected to the driving gear 3 in the form of a spur gear to rotate the weaving gear 17. The rotational force transmitted to the weaving gear 17 rotates the weaving gear body 18 fixed with bolts on both sides of the weaving gear 17, and the general bearing 16 installed at the upper and lower parts of the weaving gear body 18. 16 'is fixed to the outside and rotates inside the bearings 16 and 16' in contact with the weaving gear body 18 so that the weaving gear body 18 can generate a uniform rotational force. The rotational force of the weaving gear body 18 is transmitted to the careful bearing 15 ', and the welding torch 24 is driven by the careful bearing 15' which is rotating at the rotational force transmitted from the weaving gear body 18. Start the rotary motion. If only one caution bearing 15 'is mounted, the tip of the welding torch 24 rotates idly with the caution bearing 15' as the center of rotation, but the radius of rotation is not adjusted so that the radius of rotation according to the rotation speed cannot be adjusted. do. In order to prevent the phenomenon described above, by installing the careful bearing 15, the idle rotation radius of the revolution of the welding torch 24 at the tip of the welding torch 24 due to the rotation of the careful bearing 15 is transmitted through the careful bearing 15. Adjusted to maintain a constant weaving width irrespective of the change of rotation speed to maintain a bead width during high speed welding, and to maintain a constant weaving width against poor bead width generated during high speed welding. It is possible to improve the shape well and to reduce the occurrence of pore defects by allowing the pores generated by the harmful gas present in the weld melt to escape out of the melt naturally. Welding productivity can be improved.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

According to the present invention, a welding torch is automatically circularly rotated in a welded part by using an eccentric shaft peak rotational force of a DC servomotor, and a careful bearing mounted on the upper part of the welding torch and the lower part of the inner surface of the weaving gear body is used for the DC servomotor. Maintains the center of rotation of the welding torch so that the rotation range of the tip of the welding torch does not change even if the rotational speed changes, and generates a beautiful and uniform welding bead. It plays a role of driving away from the welding part by rotation weaving, and it is effective to prevent the generation of welding pore defects in the high speed fillet welding execution part, and it is very useful to prevent undercut and convex bead generation when welding using high current and high voltage. .

Claims (1)

In the carriage automatic welding device using the carbon dioxide arc welding method, A DC servomotor (5) fastening both sides to the upper surface of the main body (2) by using bolts, and having an insulating layer bakelite (4) mounted on the lower side thereof, A driving gear (3) mounted below the rotating shaft of the DC servomotor (5); A weaving gear 17 connected to one side of the driving gear 3 in the form of a spur gear; A weaving gear body 18 inserted into the weaving gear 17 and fixed to both sides of the weaving gear 17 using bolts; A bearing 16 fitted to the upper outer surface of the weaving gear body 18; A careful bearing 15 'mounted to the inner surface of the lower weaving gear body 18 and having a bushing 19 inserted therein; A bearing 16 'mounted on an outer surface of the lower weaving gear body 18; A lower body cover 1 fixed to a bolt in contact with a lower surface of the main body 2; A lower cover flange 26 provided on a lower surface of the main body lower cover 1, One side of the lower cover flange 26 is connected through the weaving gear 17, the weaving gear body 18, the careful bearing 15 ′, the body lower cover 1, and the lower cover flange 26. Protruding welding torch 24, A welding torch fixing nut 25 fastened inside the lower cover flange 26 to fix the welding torch 24; An intermediate connection fitting 20 having one end fastened to an inner surface of the lower cover flange 26; An insulator 21 mounted below the intermediate connection fitting 20; A tip 23 mounted at the lower end of the welding torch 24; A nozzle 22 mounted below the insulator 21; A careful bearing 15 having a bushing 13 mounted therein fitted over the welding torch 24; A bearing case 14 mounted to the outside of the careful bearing 15 so as to surround the outside of the careful bearing 15; An insulating bakelite 4 'mounted on the bearing case 14, An extension power cable lower terminal 12 provided on the insulation bakelite 4 '; A flexible hose 10 provided on an upper portion of the extension power cable lower terminal 12; An extension power cable upper terminal 9 provided on an upper portion of the flexible hose 10, An extension power cable 11 provided between the extension power cable lower terminal 12 and the extension power cable upper terminal 9; An insulating box (7) fixed to the upper surface of the bearing case (14) by using bolts, Wire inlet connector (8) mounted on the upper surface of the insulating box (7), Eccentric shaft circular rotary torch, characterized in that composed of a body case (6) surrounding the outside of the insulating box (7) and the DC servo motor (5) and protrudes to the upper surface.