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KR-102961577-B1 - Spot welding indentation prevention device and spot welding system including the same

KR102961577B1KR 102961577 B1KR102961577 B1KR 102961577B1KR-102961577-B1

Abstract

The present invention relates to a spot welding indentation prevention device and a spot welding system including the same, which prevents indentations that may occur on a base material due to the pressure applied by an electrode tip during spot welding. The device may include a plate unit installed between a base material and an electrode tip for spot welding of the base material to protect the base material so as to prevent indentations from occurring on the base material, a support bracket unit formed to extend long in the height direction to support the plate unit at a predetermined height, and an elastic support unit installed between the plate unit and the support bracket unit to elastically support the plate unit in the height direction.

Inventors

  • 기세춘
  • 이동훈

Assignees

  • (주) 서연탑메탈

Dates

Publication Date
20260507
Application Date
20240425

Claims (9)

  1. A plate unit that protects the base material by being installed between the base material and an electrode tip for spot welding of the base material, so as to prevent indentation from occurring on the base material; A support bracket unit formed to extend long in the height direction and supporting the plate unit at a predetermined height; and Includes an elastic support unit installed between the plate unit and the support bracket unit, which elastically supports the plate unit in the height direction. The above plate unit is, A plate body portion formed in the shape of a generally flat plate, installed between the base material and the electrode tip, and protecting the base material so as to prevent an indentation from occurring on the base material due to the pressure of the electrode tip during spot welding of the base material; and A cooling portion formed on at least a part of the plate body portion to cool or dissipate heat generated at the welding portion to the outside, so as to prevent deformation of the base material caused by heat generated at the welding portion due to current flow between the base material and the electrode tip during spot welding of the base material; The above support bracket unit is, A first support bracket formed in a plate shape extending long in the height direction, wherein at least a portion of the lower part is formed to be bent in a horizontal direction perpendicular to the height direction; A second support bracket formed by being bent into an overall "L" shape and coupled to the upper end of the first support bracket so as to support in the horizontal direction one surface of the plate body portion opposite to the support surface of the plate body portion supporting the base material in the height direction; and An insulating member formed between the first support bracket and the second support bracket to insulate the first support bracket and the second support bracket; A spot welding indentation prevention device including
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  4. In Article 1, The above second support bracket is, A vertical coupling portion formed in a plate shape extending long in the height direction and coupled to the upper end of the first support bracket; and A horizontal support member formed in the shape of a plate extending horizontally from the upper end of the vertical joint member to support the plate body member; The above plate unit is, It further includes a support bolt member formed in a bolt shape extending long in the height direction, wherein one end is coupled to one surface of the plate unit and the other end is formed to penetrate a through hole formed in the horizontal support member. The above elastic support unit is, A coil spring member inserted into the support bolt member, formed between the horizontal support portion and the plate body portion of the second support bracket, so as to elastically support the plate body portion in the height direction; A spot welding indentation prevention device including
  5. In Article 1, The above second support bracket is, A vertical coupling portion formed in a plate shape extending long in the height direction and coupled to the upper end of the first support bracket; and A horizontal support member formed in the shape of a plate extending horizontally from the upper end of the vertical joint member to support the plate body member; The above elastic support unit is, A cylinder member formed between the horizontal support portion and the plate body portion of the second support bracket, and elastically supporting the plate body portion in the height direction; A spot welding indentation prevention device including
  6. In Article 4 or Article 5, The above second support bracket is, A coupling bolt member formed to penetrate a first coupling hole formed in the first support bracket and a second coupling hole formed in the vertical coupling part is coupled to the upper end of the first support bracket, and The first coupling hole portion above is, One end of the above-mentioned connecting bolt member is formed as a screw hole portion having female screw threads formed on its inner surface so that it can be screw-coupled, and The second coupling hole portion above is, A spot welding indentation prevention device formed with a slot hole portion that extends long in the height direction and through which the coupling bolt member passes, so that the coupling position with the first support bracket in the height direction can be adjusted.
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  8. In Article 6, The above insulating member is, An insulating plate formed in a flat plate shape corresponding to the vertical coupling portion of the second support bracket, installed between the vertical coupling portion and the first support bracket, and having a third coupling hole formed through which the coupling bolt member passes; An insulating washer formed in a washer shape and inserted into the coupling bolt member so as to be installed between a flat washer or a spring washer supporting the head portion of the coupling bolt member and the vertical coupling portion; and An insulating bush formed in a bush shape and inserted into the coupling bolt member so as to be installed between the outer surface of the coupling bolt member and the inner surface of the second coupling hole portion; A spot welding indentation prevention device comprising at least one of the following.
  9. A first electrode tip formed to face the first base material so as to be in contact with the first base material and to support and pressurize the first base material at a welded portion formed in a vertically overlapping portion of the first base material and the second base material; and It includes a second electrode tip formed to face the second base material vertically with respect to the welding portion, and formed to face the second base material so as to contact the second base material and support and pressurize the second base material. At least one of the first electrode tip and the second electrode tip is, It is installed to be able to move up and down in a direction toward the second electrode tip or the first electrode tip, which are formed facing each other vertically, and The apparatus further includes a spot welding indentation prevention device installed at least one of the location between the first electrode tip and the first base material and the location between the second electrode tip and the second base material so as to prevent an indentation from occurring on the first base material or the second base material due to the pressure applied by the first electrode tip or the second electrode tip during spot welding of the first base material and the second base material. The above spot welding indentation prevention device is, A plate unit formed in the shape of an overall flat plate to protect the first base material or the second base material; A support bracket unit formed to extend long in the height direction and supporting the plate unit at a predetermined height; and Includes an elastic support unit installed between the plate unit and the support bracket unit, which elastically supports the plate unit in the height direction. The above plate unit is, A plate body portion formed in an overall flat plate shape, installed between the first electrode tip and the first base material or between the second electrode tip and the second base material, and protecting the first base material or the second base material so as to prevent an indentation from occurring on the first base material or the second base material due to the pressure applied by the first electrode tip or the second electrode tip during spot welding of the first base material and the second base material; and A cooling portion formed on at least a part of the plate body portion to cool or dissipate heat generated at the weld portion to the outside, so as to prevent deformation of the first base material or the second base material caused by heat generated at the weld portion during spot welding of the first base material and the second base material; The above support bracket unit is, A first support bracket formed in a plate shape extending long in the height direction, wherein at least a portion of the lower part is formed to be bent in a horizontal direction perpendicular to the height direction; A second support bracket formed by being bent into an overall "L" shape and coupled to the upper end of the first support bracket so as to be able to support in the horizontal direction one surface of the plate body portion opposite to the support surface of the plate body portion supporting the first base material or the second base material in the height direction; and An insulating member formed between the first support bracket and the second support bracket to insulate the first support bracket and the second support bracket; A spot welding system including

Description

Spot welding indentation prevention device and spot welding system including the same The present invention relates to a spot welding indentation prevention device and a spot welding system including the same, and more specifically, to a spot welding indentation prevention device and a spot welding system including the same that prevents indentations that may occur in a base material due to the pressure applied by an electrode tip during spot welding. Generally, spot welding (electric resistance welding) can be structured to join (weld) by using electricity to pass it through the base material located between the upper and lower electrodes (electrode tips). Since such spot welding can cause problems such as welding not being performed or welding quality deteriorating because current does not flow when there is a gap or a gap between base materials stacked vertically, the upper and lower electrode tips formed to be vertically movable press the base materials to press and bond the base materials that are separated or have gaps, thereby allowing electricity to flow and increasing electrical resistance to generate heat, thus performing joining (welding). However, this conventional spot welding had a problem in that, during the process where the electrode tip presses the base material, a deep indentation (penetration mark) is formed in the base material, and as the tensile strength of the welded area of the base material is significantly reduced by the depth of the indentation, the welded area of the weakened base material easily fractures. In addition, as indentations occur at the welded area of the base material, the welded area of the base material is pushed outward from the periphery of the welded area during joining, which can lead to plate separation where the base materials separate. Furthermore, as the appearance of the spot welded surface is deformed, there was a problem in that the appearance quality of the welded product was significantly degraded. Additionally, to ensure quality regarding the indentations generated at the welded area, separate post-processing operations such as buffing by a worker were performed, which resulted in a decrease in the productivity of the spot welding operation. FIGS. 1 to 3 are cross-sectional and perspective views schematically illustrating a spot welding system including a spot welding indentation prevention device according to one embodiment of the present invention. FIG. 4 is a cross-sectional view schematically showing a spot welding system including a spot welding indentation prevention device according to another embodiment of the present invention. FIGS. 5 to 12 are perspective and cross-sectional views schematically illustrating various embodiments of a cooling portion formed in a plate unit of the spot welding indentation prevention device of FIG. 1. FIGS. 13 to 16 are cross-sectional views schematically illustrating various embodiments of a guide groove portion formed in the plate unit of the spot welding indentation prevention device of FIG. 1. Hereinafter, several preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, and the following embodiments may be modified in various different forms, and the scope of the invention is not limited to the following embodiments. Rather, these embodiments are provided to make the disclosure more faithful and complete and to fully convey the spirit of the invention to those skilled in the art. In addition, the thickness or size of each layer in the drawings is exaggerated for convenience and clarity of explanation. Hereinafter, embodiments of the present invention are described with reference to drawings that schematically illustrate ideal embodiments of the present invention. In the drawings, variations of the illustrated shapes may be expected, for example, depending on manufacturing techniques and/or tolerances. Accordingly, embodiments of the inventive concept should not be interpreted as being limited to specific shapes of the areas illustrated herein, but should include, for example, variations in shape resulting from manufacturing. FIGS. 1 to 3 are cross-sectional and perspective views schematically illustrating a spot welding system including a spot welding indentation prevention device (1000) according to one embodiment of the present invention, FIG. 4 is a cross-sectional view schematically illustrating a spot welding system including a spot welding indentation prevention device (1000) according to another embodiment of the present invention, FIGS. 5 to 12 are perspective and cross-sectional views schematically illustrating various embodiments of a cooling portion (120) formed in a plate unit (100) of the spot welding indentation prevention device (1000) of FIG. 1, and FIGS. 13 to 16 are cross-sectional views schematically illustrating