JPS61123472A - Wire feeding method - Google Patents

Abstract

PURPOSE:To extend a life of a wire guide turning timely the wire guide in a conduit cable for guiding a welding wire from a pail can, to the shaft core, changing its slide-contact surface, and stabilizing a feeding property of the welding wire for many hours. CONSTITUTION:A wire guide 8 in a conduit cable 21 connected to a terminal 26 of a pail can 1 by a box nut 22 is freely rotatable together with connecting metallic fittings 23. A main gear 25 being in a wire inserting path of the connecting metallic fittings 23 is engaged to an operating gear 30 of the terminal 26, rotated by turning by a fingertip of the operating gear 30, and turns the wire guide 8. By this turning, a slide-contact surface of a welding wire is changed, and the consumption is equalized. Accordingly, a feeding property of the welding wire is stabilized extending over many hours, and the guide life is extended. In this regard, a spring 35 pressing spherical body 36 is a rotation stopper of the operating gear 30.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a wire feeding method suitable for use in a wire feeding path of a welding robot or automatic welding device that performs welding using a consumable welding wire. It is something.

BACKGROUND OF THE INVENTION Conventional techniques and their problems Generally, a conduit cable with a wire guide inside is used in the wire feeding path of welding robots, automatic welding equipment, etc. For example, as shown in FIG. 1, a welding wire 2 pulled out from a pail can 1 is sent to the tip of a welding torch 5 of a welding robot 4 by a wire feeding motor 3, but the wire feeding path is This is the case with the conduit cable shown at 6 installed in the As shown in FIGS. 5 and 6, the conduit cable 6 is a wire guide in which a wire guide 8 is mounted inside a rubber sheath 7. Further, this wire guide 8 is generally made of a spiral plated steel wire or the like. Further, cap nuts 9 are provided at both ends of the conduit cable 6. This cap nut 9 connects the wire guide 8 with its connecting fitting lO.
The rubber sheath 7 is supported while being crimped together with the reinforcing material 11.

The conduit cable 6 configured in this way is connected to the terminal 12 of the wire outlet of the pail can 1 on one side by means of cap nuts 9 at both ends, as shown in the figure, and on the other side is connected to the wire feeding motor 3 as appropriate. Although not shown, it is connected to a similar terminal. Note that 13 is a cable supporter for making the curvature of the conduit cable 6 gentle.

By the way, when the conduit cable 6 is used, both ends thereof are supported in a fixed position, the end side is supported by the cable supporter 13 as shown in FIG. It is supported by such things as Therefore, the conduit cable 6 always has a curved portion in the same state in the length direction, and also maintains a constant orientation in the circumferential direction with respect to the axis. This means that the contact surface of the welding wire 2 against the wire guide 8, which is pulled by the feed roll 3a of the wire feed motor 3 and moves in sliding contact within the wire guide 8, is always at a fixed location. For example, as shown in FIG. 7, the convex curved portion 6a of the conduit cable 6 is in sliding contact with the lower part of the wire guide 8 in the figure, and the concave curved portion 6b is in sliding contact with the upper part of the wire guide 8 in the figure. Therefore,
Only the same part of the wire guide 8 wears out, and the welding wire 2 is fed in such a state that it bites into the wire guide 8, and the contact resistance increases, and the welding wire 2
This means that it is being sent while being cut down.

As described above, in the conventional technology, there was a big problem in achieving the intended purpose of stably feeding welding wire over a long period of time.

Purpose of the Invention This invention provides a wire guide in a conduit cable.
Rotating the wire guide along with the conduit cable or only the wire guide about its axis at appropriate times as the welding time progresses, i.e. when the wire guide is worn to the extent that the stability of wire feeding is impaired; A method of feeding welding wire by shifting the contact surface of the welding wire to the wire guide, which extends the overall life of the wire guide and improves the feeding performance of the welding wire over a long period of time. The present invention provides a wire feeding method that provides a good level of performance.

Embodiments of the Invention FIGS. 2 to 4 show embodiments of the present invention, the gist of which is to provide a rotation mechanism to the conduit cable, use this to impart rotation to the conduit cable in a timely manner, The purpose is to feed the welding wire smoothly. In FIGS. 2 and 3, 21 is a conduit cable used in the present invention, in which the tip of a connecting fitting 23 connected to one cap nut 22 is extended, and a wire insertion passage 24 is formed in the extended part. ing.

Further, a main gear 25 is fixed to the tip thereof. The other structure is the same as the conventional example. On the other hand, the terminal 26 has
a threaded portion 27 that screws into the cap nut 22; a circular hole 28 into which the tip of the connecting fitting 23 to which the main gear 25 is fixed is inserted;
Wire insertion hole 29 and operation gear 3 that meshes with main gear 25
A support bracket 32 that supports 0 via its support shaft 31.
A window hole 33 for engaging the operating gear 30 is provided in the main gear 25. The operation gear 30 is connected to the support shaft 3
1, the operating gear 30 is rotatably attached to a support bracket 32, and a plurality of counterbores 34 are provided on the same circumference of the upper surface of the operating gear 30. The support bracket 32 is provided with a through hole 35 having a threaded portion, and the operating gear 3
A ball 36 that engages with the counterbore 34 of No. 0, and a spring 37 that presses the ball 36 are set in the through hole 35 by screws 38.

Therefore, when the conduit cable 21 is fastened and supported by the cap nut 22 to the threaded portion 27 of the terminal 26, the main gear 25 and the operating gear 30 mesh with each other, and by rotating the operating gear 30, the main gear 25 rotates, and as a result, the main gear 25 rotates. Conduit cable 21 is also displaced in the circumferential direction with respect to its axis. At this time, it goes without saying that the ball 36 provided on the support bracket 32 is engaged with the counterbore 34 provided on the operating gear 30, but by providing a plurality of counterbores 34 as appropriate, it is possible to Conduit cable 21
can be displaced in its circumferential direction.

Although the rotation mechanism of this conduit cable 21 has been explained only at one end thereof, a similar mechanism may be provided at both ends. In some cases, only the wire guide within the conduit cable may be rotated, as described below.

The welding torch 5 shown in FIG. 1 is often manufactured as a single unit with a torch head 5a and a conduit cable 5b. FIG. 4 is a diagram for implementing the present invention in such a case. This example includes 4
The explanation will be given sequentially by assigning the numerals 1 and below. The conduit cable 41 is provided with a torch adapter 42 , and the wire guide 4 is connected to the guide hole 43 of the torch adapter 42 .
4 is inserted. The wire guide 44 includes a guide spring 45 and a base 46 at its end, and further has a main gear 47 fixed to its tip. The wire guide 44 is provided up to the tip at the tip of the torch head, and is fitted and locked into the guide hole 43 of the torch adapter 42 by a base 46. On the other hand, the wire feeder 3 has a bracket 48 that receives the welding torch.
is provided. The bracket 48 has an engagement hole 49 for receiving the welding torch with the torch adapter 42, and a split groove 51 for tightening and supporting the welding torch with the pole l-50. The notch 53 is the same (an attachment part 54 that supports the operation gear 52 is provided. The operation gear 52 is rotatably attached to the attachment part 54 via a support shaft 55 at the position of the notch 53). .

Also, FIG. 2 shows how the operating gear 52 is rotated and positioned;
Although not shown, the counterbore, the sphere that engages with the counterbore, the spring, etc. described in FIG. 3 are provided in the same manner.

Therefore, in the explanation of FIGS. 2 and 3, by rotating the operation gear 30, the wire guide 8 is connected to the conduit cable 21.
However, in this case, by rotating the operating gear 52, only the wire guide 44 is rotated and displaced in its circumferential direction.

As described above, the present invention provides a mechanism that allows rotation of the wire guide in the wire feeding path, and displaces the wire guide in the circumferential direction at appropriate times as the welding time elapses to weld the wire. This is a wire feeding method that feeds the wire for use in the wire, and the operation gear 30.52 may be rotated by the output of a motor, or the wire feeding amount may be measured and the wire feeding amount may be maintained at a constant feeding amount. When the position is reached, the operating gear 30.52 may be rotated by some means.

Effects of the Invention The wire feeding method of the present invention imparts rotation to the wire guide of the wire feeding path in a timely manner as the welding time elapses,
The sliding surface of the wire guide that the welding wire comes into contact with is changed, which has the same effect as replacing the wire guide with a new one every time rotation is applied, and the wire guide This is a wire feeding method that extends the life of the welding wire in total and stabilizes the feeding performance of the welding wire over a long period of time, and exhibits excellent effects never seen before.

[Brief explanation of drawings]

FIG. 1 is an embodiment of an apparatus using the method of the present invention. FIG. 2 is a perspective view of a first device to which this invention can be applied. FIG. 3 is a sectional view of FIG. 2. FIG. 4 is a perspective view of a second device to which the present invention can be applied. FIG. 5 is a perspective view of an apparatus for carrying out the conventional method. FIG. 6 is a sectional view of FIG. 5. FIG. 7 is an explanatory diagram showing the feeding state of the welding wire.

Claims (1)

[Claims] The wire guide provided in the wire feeding path, which guides the welding wire, is rotated about its axis at appropriate times as the welding time passes, and the welding wire sliding inside the wire guide is rotated. A wire feeding method characterized by feeding the welding wire while shifting the contact surface.