JPH0238313B2 - KAITENAAKUYOSETSUSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating arc welding device that performs welding by horizontally rotating an arc at high speed.

Previously, the present applicant has proposed a method that can weld objects to be welded at high speed and with a large current, and has a low welding heat input to the welded part.
In addition, he developed a high-speed rotating arc welding method as a welding method that ensures uniform penetration of the molten metal and does not cause welding defects, and filed a patent application (Japanese Patent Application No. 79618/1983).

According to this method, there are no material defects in the weld heat affected zone around the welded part, and the melting of the molten metal in the welded part is done evenly, eliminating the problem caused by localized deep penetration. Highly efficient welding can be performed without cracking or the like. However, in actual welding work, the number of nozzles is 2 to 100.
Since the nozzle rotates horizontally at high speed at a rotational speed of Hz, there was a problem with the mechanism for supplying electricity to the nozzle from the welding power source. In other words, it is desirable to energize the nozzle near the tip in consideration of current loss, but in the case of narrow gap welding, if a energization mechanism is provided near the tip, the nozzle can be housed within the groove. Moreover, even if it could be accommodated within the groove, the current-carrying mechanism was easily damaged by welding spatter and arc heat.

From the above-mentioned viewpoints, the present invention provides a rotating arc in which the nozzle tip can be accommodated within the groove even in the case of a narrow gap, and which can reliably energize the nozzle and perform welding smoothly in high-speed rotating arc welding. A vertically oriented rotary nozzle having a tip having a wire feed port eccentrically outwardly from the axis is attached to the tip thereof, and a center thereof fixed to the upper part of the rotary nozzle. a power receiving plate having a wire insertion hole;
a carbon brush whose lower surface is in sliding contact with the upper surface of the power receiving plate, a power feeding plate fixed to the upper surface of the carbon brush, and a lower part of the carbon brush passing through the power feeding plate and the carbon brush and into the upper surface of the wire insertion hole of the power receiving plate. A wire inlet having a wire insertion hole in the center is attached to a support arm extending from the device main body side, and a lower part of the wire inlet, which is vertically attached to the support arm, is a guide hole provided in the power supply plate and the carbon brush. a guide rod to be fitted into the guide rod; an elastic body fitted around the outer periphery of the guide rod for pressing the carbon brush attached to the power supply plate to the power receiving plate; and a welding wire passed through the wire inlet to the A device characterized by comprising a wire feeding device for feeding to a rotating nozzle, and a pair of shield gas nozzles provided on both sides of the rotating nozzle with their opening surfaces facing the tip of the rotating nozzle. It is.

Next, the present invention will be explained with reference to examples and drawings.

FIG. 1 is a schematic front view of a rotating arc welding apparatus of the present invention, and FIG. 2 is an enlarged vertical cross-sectional view of the main part of the current-carrying part.

In the drawing, 1 is a gearbox attached to a frame of a welding device (not shown), 2 is a motor provided on the gearbox 1, and 3 is horizontally rotated by the motor 2 via a gear (not shown) in the gearbox 1. vertically oriented rotating nozzle, 4
is a support 1 attached to the top surface of gearbox 1
9 is a wire inlet provided on the upper surface of the gearbox 1, 5 is a shield gas nozzle base attached to the lower surface of the gearbox 1, 6 is on both sides of the lower surface of the base 5,
A pair of shield gas nozzles are provided to sandwich the rotating nozzle 3, and the opening faces thereof are directed toward the tip of the rotating nozzle 3. The rotating nozzle 3 is connected to a gear box 1 and a shield gas nozzle base 5.
is penetrated through an insulator (not shown). 7
The welding wire 8 is connected to the rollers 9, 9' and the motor 1.
This is a wire feeding device for feeding into the rotating nozzle 3 by 0.

The rotating nozzle 3 is shown in Fig. 1 and Fig. 3 A, B,
As shown in Figure C, the lower part thereof is a small diameter part 3', a tip 3'' is detachably attached to the tip of the small diameter part 3', and a wire insertion hole 3a is provided at the axis of the rotating nozzle 3. The wire insertion hole 3b of the chip 3'' is eccentrically outward from the axis.

A wire 8 is fed into the wire insertion holes 3a and 3b by a wire feeding device 7, and a rotating nozzle 3 rotated by a motor 2 and a gearbox 1.
The tip portion 8' of the wire 8 protruding from the tip 3''
rotates horizontally in an arc. Note that the diameter of the arc can be arbitrarily changed by preparing various chips 3'' having wire feeding holes with different degrees of eccentricity.

Reference numeral 11 denotes a power receiving plate fixed to the upper part of the rotary nozzle 3 for supplying power to the rotary nozzle 3. A wire feeding hole 11a is provided at the center of the power receiving plate 11, and the power receiving plate 11 rotates integrally with the rotary nozzle 3.

Reference numeral 12 denotes a carbon brush that comes into sliding contact with the upper surface of the power receiving plate 11 , and a power feeding plate 13 is fixed to the upper surface of the carbon brush 12 with bolts 14 .

Reference numeral 19 denotes a support arm extending upward from the gearbox 1 on the apparatus main body side, and the support arm 19 is provided with a wire inlet 4 having a wire insertion hole 4' in the center.

The wire inlet 4 has a power supply plate 13 at its lower part.
and the carbon brush 12, and the power receiving plate 1
It faces the upper end of the wire feeding hole 11a of No. 1.

Reference numeral 15 indicates a plurality of guide rods (only one of which is shown in an enlarged view in FIG. 2) that is vertically installed on the support arm 19.
The lower part of each guide rod 15 passes through the guide hole 13a of the power supply plate 13, and the lower part of each guide rod 15 passes through the guide hole 13a of the carbon brush 12.
It is fitted into 2a. A carbon brush 1 to which a power supply plate 13 is attached is attached to the outer periphery of the guide rod 15.
An elastic body 16 such as a spring for pressing the power receiving plate 11 is fitted. This guide rod 1
5 connects the carbon brush 12 to the power receiving plate 1 as described above.
1 and also has a detent function to prevent the carbon brush 12 from rotating together with the power receiving plate 11.

18 is a power supply cable terminal attachment hole for attaching the power supply cable 17 to the power supply plate 13.

Reference numeral 20 denotes a detector for detecting the tip end position of the wire 8, which is used for arc sensor control when positioning the axis of the rotary nozzle 3 to the groove center line.

Since this invention is configured as described above,
Even when performing narrow gap welding using a rotating nozzle, there is no problem because the power supply part is located at the top, and the power supply part is not damaged by welding spatter or arc heat, and the power supply part is connected to the carbon brush and power receiving part. Since the nozzle is in sliding contact with the other parts, excellent industrial effects are brought about, such as accurate energization of the rotating nozzle that rotates at high speed.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of the device of the present invention, FIG. 2 is an enlarged vertical cross-sectional view of the main part of the current-carrying part, and FIG. 3 is an enlarged cross-sectional view showing the tip of the rotating nozzle.
In the drawings, 1... Gearbox, 2... Motor, 3... Rotating nozzle, 4... Wire inlet, 5... Shield gas nozzle base, 6, 6... Shield gas nozzle, 7... Wire feeding device, 8 ...Welding wire, 9,9'...Roller, 10...Motor, 11
...Power receiving plate, 12...Carbon brush, 13...
Power supply plate, 14...Volt, 15...Guide rod, 1
6... Spring, 17... Power supply cable, 18
... Cable terminal mounting hole, 19 ... Support arm, 20
……Detector.

Claims (1)

[Claims] 1. A vertically oriented rotary nozzle having a tip with a wire feed port eccentrically outward from the axis attached to the tip, and a power receiver having a wire insertion hole in the center fixed to the top of the rotary nozzle. a carbon brush whose lower surface is in sliding contact with the upper surface of the power receiving plate; a power feeding plate fixed to the upper surface of the carbon brush; and a wire of the power receiving plate whose lower part passes through the power feeding plate and the carbon brush. A wire inlet having a wire insertion hole in the center is attached to a support arm extending from the device main body side facing the upper surface of the insertion hole, and a lower part of the wire inlet, which is vertically disposed on the support arm, is provided on the power supply plate and the carbon brush. a guide rod that fits into the guide hole, an elastic body that presses the carbon brush attached to the power supply plate fitted on the outer periphery of the guide rod against the power receiving plate, and a welding wire that is inserted into the wire in. A wire feeding device for feeding the gas to the rotary nozzle via the let, and a pair of shield gas nozzles provided on both sides of the rotary nozzle with their opening surfaces facing the tip of the rotary nozzle. Characteristic rotating arc welding equipment.