JP7106803B2 - Wire straightening device for arc welding - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc welding wire straightening device for straightening a bending tendency of a welding wire used for arc welding.

In arc welding, as shown in FIG. 3, a welding wire 52 fed from a wire reel or wire pack 51 is fed to an arc welding torch 54 by a feeding device 53, and a contact attached to the torch 54 is welded. It is passed through tip 55 and delivered to the weld site. At this time, the welding wire 52 comes into contact with the contact tip 55 and is supplied with power from the contact tip 55 for welding. Since the welding wire 52 cannot be fed, the welding wire 52 is fed smoothly by appropriately correcting the curl of the welding wire 52 by the correction device 56 before the feeding device 53 .

Conventionally, as a welding wire straightening device, as shown in FIG. It consists of a rotatable pressure roller 58 disposed facing two receiving rollers 57, 57, and feeds the welding wire 52 between the receiving rollers 57, 57 and the pressure roller 58. By doing so, the bending habit of the welding wire 52 is corrected. (See Patent Document 1, for example)

JP 2011-177744 A

In the above, the welding wire must be fed with a strong force due to the friction between the welding wire and the receiving roller, the welding wire and the pressing roller, and the friction between the receiving roller, the pressing roller and its rotating shaft. There was a problem that the feed did not go smoothly and there was a risk of welding failure.

The present invention solves the above-mentioned problems, and by reducing the friction between the straightening device and the welding wire, the welding wire can be smoothly fed even with a weak force and welding defects can be prevented. It is made for the purpose of providing an apparatus.

The arc welding wire straightening device of the present invention, which has been made to solve the above problems, has three rotatable spheres, the three spheres are perpendicular to the welding wire insertion direction, In the case of holding three spheres in the main body so that the line connecting the centers of the three spheres and the center of each sphere is 120° , the sphere holding groove of the holding member on one side and the holding member on the other side and the inner surface of the container body .

In the invention of claim 1, the three spheres are rotatable, and the three spheres are perpendicular to the welding wire insertion direction, and the center of the three spheres and the center of each sphere are aligned. In the case of holding three spheres in the main body so that the connecting line is 120° , the sphere holding groove of the holding member on one side, the holding portion of the holding member on the other side, and the inner surface of the body. Since the three spheres can be rotated freely, the friction between the welding wire and the three spheres is small, so that the welding wire can be smoothly fed even with a weak force, thereby preventing defective welding. be.

BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional front view which shows embodiment of this invention. 2 is a cross-sectional side view of FIG. 1; FIG. It is explanatory drawing of arc welding. It is a cross-sectional front view showing a conventional example.

Preferred embodiments of the present invention will now be described with reference to FIGS. 1 and 2. FIG.
Reference numeral 1 denotes a main body composed of a container 2 and a lid 3. The container 2 is cylindrical and open at both ends. A leg portion 3b having substantially the same diameter as the inner diameter of the main body 1 is formed following the leg portion 3a. It fits in and closes the both open ends of the container body 2 .

Reference numeral 5 denotes a correcting section composed of three perfectly circular spheres 6 and holding members 7 and 8 whose outer shape is slightly smaller than the inner diameter of the vessel 2 and holds the three spheres 6 therebetween. The holding member 7 on the side (the right side in FIG. 2) has an insertion hole 7a for the welding wire 4 formed in the center, and the inner surface on the other side (the left side in FIG. 2) has center lines A in three directions from the center. , B and C form a sphere holding groove 7b with an angle of 120°. The holding member 8 on the other side has an insertion hole 8a for the welding wire 4 formed in the axial direction of the central portion thereof, and has holding portions 8b for holding three spheres 6 on the inner surface corresponding to the holding member 7 on the one side. The spheres 6 are held by the sphere holding groove 7b of the holding member 7 on one side, the holding portion 8a of the holding member 8 on the other side, and the inner surface of the container body 2. A line forming the insertion portion 9 of the welding wire 4 and connecting the centers of the three spheres 6 (the center of the insertion portion 9 of the welding wire 4) and the center of each sphere 6 is the center line A of the sphere holding groove 7b. It is rotatably held so as to be the same as B and C.

That is, in the above-described embodiment, the welding wire 4 passes through the insertion holes 3c of the lid 3 on the other side, passes through the insertion portions 9 in the central portions of the three spheres 6, and enters the insertion holes 3c of the lid 3 on the one side in a straight line. , and the three spheres 6 are held so as to be perpendicular to the insertion direction of the welding wire 4 .

A coil spring 10 is interposed between the outer surface of the holding member 7 on one side and the inner surface of the lid 3 on the one side. is doing.

Next, the method of straightening the welding wire by the straightening device of the present invention will be described. The central insertion portion 9, the insertion portion 7a of the holding member 7 on one side, and the insertion hole 3c of the cover 3 on the other side are inserted through the axial center of the coil spring 9, and the ball is fed to the torch by the feeding device. At this time, when the welding wire 4 passes through the insertion portion 9 at the center of the three rotatably held spheres 6, the bending tendency is corrected by the three spheres.

As described above, there are three rotatable spheres, the three spheres are perpendicular to the welding wire insertion direction, and the line connecting the centers of the three spheres and the center of each sphere. is 120°, and is held by the sphere holding groove 7b of the holding member 7 on one side, the holding portion 8a of the holding member 8 on the other side, and the inner surface of the vessel 2. As a result , the three spheres can rotate freely without being restricted in their rotational direction, and the friction between the welding wire and the three spheres is small, so the welding wire can be fed smoothly even with a weak force. Welding defects can be prevented , and the three spheres can be held simply and easily.

REFERENCE SIGNS LIST 1 container 2 main body 3 lid 3a head 3b leg 3c insertion hole 4 welding wire 5 correction part 6 sphere 7 holding member on one side 7a insertion hole 7b ball holding groove 8 holding member on the other side 8a insertion hole 8b holding part 9 Insertion portion 10 Coil springs A, B, C Center line

Claims (1)

It has three rotatable spheres, the three spheres are perpendicular to the welding wire insertion direction, and the line connecting the center of the three spheres and the center of each sphere is 120°. In the case where three spheres are held in the main body as in the above, the sphere holding groove of one holding member, the holding portion of the holding member on the other side, and the inner surface of the cylindrical body , For arc welding , wherein the holding member on one side and the holding member on the other side have an outer shape slightly smaller in diameter than the inner diameter of the vessel body, and sandwich three spheres in the insertion direction of the welding wire. Wire straightener.

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