KR-20260064830-A - WELDING METHOD

Abstract

The present invention is characterized by the technical features comprising: a preparation step of positioning a first workpiece and a second workpiece so as to be in contact; a spot welding step of using a torch to perform a plurality of spot welds along spaced intervals on one selected side or the other side where the first workpiece and the second workpiece are in contact; a first main welding step of performing main welding along the longitudinal direction of the surface where the first workpiece and the second workpiece are in contact on the opposite side where the spot welds were performed in the spot welding step; and a first main welding step of performing main welding along the longitudinal direction of the surface where the first workpiece and the second workpiece are in contact on the surface where the spot welds were performed in the spot welding step.

Inventors

• 김승모
• 홍주표

Assignees

• 한국기술교육대학교 산학협력단

Dates

Publication Date

20260508

Application Date

20241029

Claims (4)

1. A preparation step (S10) for positioning the first workpiece (100) and the second workpiece (200) so that they come into contact; A spot welding step (S20) in which a plurality of spot welds are performed along spaced intervals using a torch (400) on one selected side or the other side where the first workpiece (100) and the second workpiece (200) come into contact; A first main welding step (S30) in which main welding is performed along the longitudinal direction of the surface where the first workpiece (100) and the second workpiece (200) come into contact on the opposite side where spot welding was performed in the above spot welding step (S20); and The method comprises a second main welding step (S40) in which main welding is performed along the longitudinal direction of the surface where the first workpiece (100) and the second workpiece (200) come into contact on the surface where spot welding was performed in the above spot welding step (S20); The above preparation step (S10) is The method is configured to include a jig fixing step (S11) of placing and fixing a jig (300) adjacent to one of the first workpiece (100) or the first workpiece (100), wherein The above jig fixing step (S11) is The guide portion (420) of the torch (400) is positioned adjacent to the jig (300) and one of the first workpiece (100) or the second workpiece (200) that are spaced apart from the jig (300) in the above spot welding step (S20). The above torch (400) is Body (410); A guide portion (420) provided on one side of the body (410); and It is configured to include an electrode rod (430) installed on the body (410) and formed to protrude outward from the guide portion (420). The above guide part (420) A tapered portion (421) is formed at the end of the guide portion (420), wherein the outer diameter gradually decreases as it extends outward from the body (410) side. The above tapered portion (421) is A first tapered portion (421a) is formed partially at the end of the guide portion (420) and is formed in a shape that slopes outward from the body (410) side, and is formed to form an angle of inclination of 45° with the outer surface of the guide portion (420); A second tapered section (421b) is formed partially at the end of the guide section (420) and is formed in a shape that slopes outward from the body (410) side, and is formed to form an angle of inclination of 60° with the outer surface of the guide section (420); A welding method for forming a uniform bead, characterized by comprising: a third tapered portion (421c) that is partially formed at the end of the guide portion (420), is formed in a shape that slopes outward from the side of the body (410), and is formed to form an angle of inclination of 75° with the outer surface of the guide portion (420).
2. In claim 1, The above guide part (420) The first workpiece (100) or the second workpiece (200) is in contact with the above workpiece in an inclined shape, A welding method for forming a uniform bead, characterized in that when the guide portion (420) contacts the first workpiece (100) or the second workpiece (200), the end of the electrode rod (430) is spaced 1 to 2 mm apart from the part where the first workpiece (100) and the second workpiece (200) come into contact.
3. In claim 1, A welding method for forming a uniform bead, characterized in that the angle of inclination formed by the torch (400) with the first workpiece (100) or the second workpiece (200) in the spot welding step (S20), the first main welding step (S30), and the second main welding step (S40) is 45° to 75°.
4. In claim 1, The above spot welding step (S20), first main welding step (S30) and second main welding step (S40) are A welding method for forming a uniform bead, characterized by the fact that when the first workpiece (100) and the second workpiece (200) are formed in a vertical shape, the torch (400) moves from the lower side to the upper side while tilted downwards to perform welding.

Description

Welding Method The present invention relates to a welding method that ensures a uniformly formed bead is formed by welding. More specifically, the invention relates to a welding method in which a first workpiece and a second workpiece are positioned to be in contact, and welding is performed using a torch on the surface where the first workpiece and the second workpiece are in contact, and welding is performed using weaving while the torch is tilted away from the first workpiece or the second workpiece, thereby maximizing the length of the bead formed in a single weld and forming a uniform bead. Generally, weaving welding is a welding method in which the torch is moved while the electrode rod is moved alternately in both directions relative to the welding direction to form a weld bead. However, conventional welding using weaving has a problem in that a uniform bead is not formed due to the movement of the torch outside the range for weaving caused by frequent movement of the torch during the welding process. In addition, since welding is performed primarily based on the skilled experience of the operator without a supported torch, an uneven bead shape may be formed during the weaving process. Furthermore, as the length of the bead formed in a single weld is short, the number of connection points between beads increases, leading to a problem where the bead shape at these connection points is not uniform. Accordingly, various welding devices that perform welding through automation have been developed to prevent the aforementioned problems; however, these devices have very low utility due to the high costs involved in installing and maintaining them. Therefore, a welding method is required that maximizes the length of the bead formed in a single weld and enables the formation of a uniform bead by moving the supported torch. FIG. 1 is a flowchart illustrating a welding method in which a uniform bead is formed according to the present invention. FIG. 2 is a variety of examples showing the preparation steps in a welding method in which a uniform bead is formed according to the present invention. FIG. 3 is an example showing a jig fixing step in a welding method in which a uniform bead is formed according to the present invention. FIG. 4 is an example showing a spot welding step in a welding method in which a uniform bead is formed according to the present invention. FIG. 5 is an example showing the first main welding step in a welding method in which a uniform bead is formed according to the present invention. FIG. 6 is an example showing a second main welding step in a welding method in which a uniform bead is formed according to the present invention. FIG. 7 is a perspective view showing a torch in a welding method in which a uniform bead is formed according to the present invention. FIG. 8 is an example showing a case in which the first workpiece and the second workpiece are formed in a vertical shape in a welding method for forming a uniform bead according to the present invention. The advantages and features of the embodiments of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components. In describing the embodiments of the present invention, if it is determined that a detailed description of known functions or configurations could unnecessarily obscure the essence of the invention, such detailed description will be omitted. Furthermore, terms and words used in this specification and claims are defined in consideration of their functions in the embodiments of the present invention and should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe their invention, they must be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application. Before proceeding with the following description with reference to the drawings, it should be noted that matters not necessary to reveal t