KR-20260065785-A - Hot stamping component and method of manufacturing the same

Abstract

The present invention provides a method for manufacturing a hot stamping part, comprising: a preparation step of preparing a blank; a heating step of heating the blank; a transfer step of transferring the heated blank to a press mold; a forming and first piercing step of hot pressing the transferred blank to form the shape of a hot stamping part and forming at least two holes in the transferred blank; and a trimming step of cutting the outer portion of the formed blank using the at least two holes.

Inventors

• 공제열
• 박계정
• 박재명
• 윤승채
• 현주식

Assignees

• 현대제철 주식회사

Dates

Publication Date

20260511

Application Date

20260427

Claims (7)

1. As a hot stamping part, A first shear plane in which a first hole is defined; and A second shear surface formed on the edge of the above-mentioned hot stamping part; Includes, In the portion adjacent to the above-mentioned first shear plane, a first flow line having a first length and a first burr are formed, and In the portion adjacent to the second shear plane, a second flow line or a first diagonal pattern having a second length smaller than the first length and a second burr are formed, and The first length is 50㎛ or more, and the second length is less than 50㎛, and A hot stamping part in which the height of the second burr is smaller than the height of the first burr.
2. In paragraph 1, A hot stamping part further comprising a third shear plane defined with a second hole spaced apart from the first hole.
3. In paragraph 2, A hot stamping part having a third straight line or a second diagonal line pattern formed in a portion adjacent to the third shear plane, having a third length smaller than the first length.
4. In paragraph 1, A hot stamping part further comprising a fourth shear plane in which a third hole spaced apart from the first hole is defined.
5. In paragraph 4, A hot stamping part having a fourth shear line formed in a portion adjacent to the fourth shear plane, the fourth shear line having a fourth length greater than the second length.
6. In paragraph 1, A hot stamping part in which the edges of the above hot stamping part form a curved shape.
7. In paragraph 6, The above hot stamping part further includes a plating layer, and The above plating layer is provided along the edge of the hot stamping part.

Description

Hot stamping component and method of manufacturing the same The present invention relates to a hot stamping part and a method for manufacturing the same. As environmental and fuel efficiency regulations become stricter globally, the need for lighter vehicle materials is increasing. Consequently, research and development on ultra-high-strength steel and hot-stamping steel is actively underway. Hot stamping is a process for manufacturing high-strength parts by heating a steel plate to a high temperature in a furnace and then forming and rapidly cooling it in a press. In addition, a piercing process may be additionally performed to cut/machine holes within the high-strength parts. The piercing process utilizes laser equipment or press molds; however, using laser equipment may increase processing time, while using press molds may degrade the quality of the shear surface. Related technologies include Korean Patent Publication No. 10-2020-0080721 (Title of Invention: Hot Stamping Part Manufacturing Device and Method for Manufacturing Hot Stamping Part Using the Same), etc. FIG. 1 is a flowchart schematically illustrating a method for manufacturing a hot stamping part according to one embodiment of the present invention. FIG. 2 is a flowchart schematically illustrating the preparation steps of a method for manufacturing a hot stamping part according to one embodiment of the present invention. FIG. 3 is a schematic plan view illustrating a blank according to one embodiment of the present invention. FIG. 4 is a flowchart schematically illustrating the heating step of a method for manufacturing a hot stamping part according to one embodiment of the present invention. FIG. 5 is a drawing illustrating a heating furnace having a plurality of sections in the heating step of a method for manufacturing a hot stamping part according to one embodiment of the present invention. FIGS. 6 and 7 are cross-sectional views illustrating the forming and first piercing steps of a manufacturing process for a hot stamping part according to one embodiment of the present invention. FIG. 8 is a schematic perspective view illustrating a blank of a manufacturing process for a hot stamping part according to one embodiment of the present invention. FIG. 9 is a perspective view illustrating a second piercing step of a manufacturing process for a hot stamping part according to one embodiment of the present invention. FIG. 10 is a perspective view schematically illustrating a hot stamping part according to one embodiment of the present invention. FIG. 11 is a cross-sectional view schematically illustrating the cross-sectional view of a first hole of a hot stamping part according to one embodiment of the present invention. FIG. 12 is a cross-sectional view schematically illustrating the cross-sectional view of a first additional hole or a first edge of a hot stamping part according to one embodiment of the present invention. FIGS. 13 and 14 are a plan view and a cross-sectional view schematically illustrating the cross-sectional view of a first additional hole or a first edge of a hot stamping part according to one embodiment of the present invention. FIG. 15 is a cross-sectional view schematically illustrating the cross-sectional view of the second edge of a hot stamping part according to one embodiment of the present invention. Figures 16 and 17 are drawings illustrated to explain the difference according to the length of the flow line formed around the shear plane. FIGS. 18 and FIGS. 19 are plan views showing the effects when a manufacturing method according to one embodiment of the present invention is applied. The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features 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 drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various forms. In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component. In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise. In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added. In the following embodiments, when a part such as a film, region, or component is described as being on or above another part, it includes not only cases where it is directly on top of another part, but also cases where another film, region, or component is interposed in between. In the drawings, the size of