KR-20260066337-A - APPARATUS FOR WELDING AND GRINDING STEEL SHEET

Abstract

A welding and grinding device for steel plates according to one embodiment of the present invention comprises: a welding unit that forms a welded portion by welding an overlap portion of a preceding steel plate and a succeeding steel plate; a grinding unit installed in the welding unit and grinding the welded portion in conjunction with the welding unit when the welding unit is operated; and a cleaning unit installed in the welding unit and cleaning the welded portion before grinding in conjunction with the welding unit when the welding unit is operated.

Inventors

• 서두원
• 신상무
• 이청빈
• 오화석

Assignees

• 주식회사 포스코

Dates

Publication Date

20260512

Application Date

20241104

Claims (6)

1. A welding unit that forms a welded portion by welding the overlap portion of a leading steel plate and a trailing steel plate; A grinding unit installed in the welding unit and, when the welding unit is operated, is linked with the welding unit to grind the welded portion; and A cleaning unit installed in the welding unit and linked with the welding unit when the welding unit operates to clean the welded portion before grinding; A welding and grinding device for steel plates including
2. In paragraph 1, The above welding unit is, A carriage moving along the above-mentioned overlap portion; and A welding wheel installed on the carriage and moving along the overlap portion by the movement of the carriage to form the weld portion by seam welding the overlap portion; The above grinding unit is, A grinding wheel provided on the carriage, positioned on the side opposite to the direction of travel of the welding wheel relative to the welding wheel, and grinding the welding portion while moving the welding portion by the movement of the carriage; The above cleaning unit is, A brush installed on the carriage and positioned between the welding wheel and the grinding wheel to clean the welded portion by sweeping the welded portion as the carriage moves; A welding and grinding device for steel plates including
3. In paragraph 2, The above grinding wheel is a welding and grinding device for steel plates arranged so that a pair of them correspond to each other and are spaced apart from each other in the upper and lower directions.
4. In paragraph 2, The above grinding unit is, A wheel moving cylinder installed on the above carriage and connected to the grinding wheel to move the grinding wheel toward the welding part; and It further includes a wheel pressure sensor installed in the wheel moving cylinder and measuring the pressure of the grinding wheel on the welded portion; The above wheel moving cylinder is a welding and grinding device for steel plates that moves the grinding wheel so that the grinding wheel presses the welding portion by a set pressure.
5. In paragraph 2, The above cleaning unit is, A brush moving cylinder installed on the above carriage and connected to the brush to move the brush toward the welding portion; and It further includes a brush pressure sensor installed in the wheel moving cylinder and measuring the pressure of the brush on the welded portion; The above brush moving cylinder is a welding and grinding device for steel plates that moves the brush so that the brush presses the welding portion by a set pressure.
6. In paragraph 2, The above welding unit is, A thickness adjustment wheel installed on the above carriage, positioned between the welding wheel and the brush, and moving along the overlap portion to press the overlap portion and adjust the thickness of the overlap portion; A welding and grinding device for steel plates including further

Description

Apparatus for Welding and Grinding Steel Sheet The present invention relates to a device for welding and grinding steel plates. The main production of car body panels is carried out by electroplating cold-rolled steel sheets that have passed through the annealing process. In order to continue operations 24 hours a day on this production line, continuous operation is achieved by welding the leading steel sheet and the trailing steel sheet. The steel sheet welding device that welds the overlapping area of the leading steel sheet and the trailing steel sheet is a mesh seam welder type, which performs welding by generating electric resistance heat through a welding wheel (electrode wheel). However, the aforementioned production line produces up to giga-grade high-strength steel; due to the high carbon content of high-strength steel, electrical resistance increases, resulting in inferior weld bead surface shape. When steel plates with such inferior weld bead surfaces pass through the production line, the line's components, particularly the rolls, may be damaged. To prevent this, the welds are manually ground, but this poses a risk of safety accidents. Figure 1 is a drawing showing the welded portion of a leading steel plate and a trailing steel plate made of ordinary steel material. Figure 2 is a drawing showing the welded portion of a leading steel plate and a trailing steel plate made of high-strength steel. Figure 3 is a drawing showing a worker manually grinding the welded part to remove the shape defect of the weld bead surface in the welded part of Figure 2. FIGS. 4 and FIGS. 5 are a perspective view and a plan view showing a welding and grinding device for steel plates according to one embodiment of the present invention. Figures 6 and 7 are drawings showing that a leading steel plate and a trailing steel plate are welded and ground by the welding and grinding device of the steel plate of Figure 4. Preferred embodiments of the present invention will be described below with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, embodiments of the present invention are provided to more fully explain the present invention to those with average knowledge in the relevant technical field. In drawings, the shapes and sizes of elements may be exaggerated for clearer explanation. In describing the embodiments of the present invention, if it is determined that a detailed description of known technology related to the present invention may unnecessarily obscure the essence of the present invention, such detailed description will be omitted. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, such definitions should be based on the content throughout this specification. The terms used in the detailed description are merely for describing the embodiments of the present invention and should not be limited in any way. Unless explicitly stated otherwise, expressions in the singular form include the meaning of the plural form. In this description, expressions such as “include” or “equipped” are intended to refer to certain characteristics, numbers, steps, actions, elements, parts or combinations thereof, and should not be interpreted to exclude the existence or possibility of one or more other characteristics, numbers, steps, actions, elements, parts or combinations thereof other than those described. Unless otherwise specifically defined in the specification of the present invention, % units mean weight %. In this specification, terms such as 'top', 'upper', 'upper surface', 'lower', 'lower surface', 'lower surface', and 'side surface' are based on the drawings and may actually vary depending on the direction in which the elements or components are arranged. Additionally, throughout the specification, when it is said that one part is 'connected' to another part, this includes not only cases where they are 'directly connected,' but also cases where they are 'indirectly connected' with other elements in between. The present invention will be described in detail below through each embodiment or example of the invention. It should be noted that each embodiment or example described in this specification is not limited to a single embodiment or example, but may also be combined with other embodiments or examples. Accordingly, the citation of claims in the patent claims is merely an example of an embodiment, and the technical concept of the present invention should not be interpreted as being limited only to a combination with the cited claims; rather, combinations with various claims are also included within the scope of the technical concept of the present invention. Figure 1 is a drawing showing the welded por