Automobile part manufacturing method using quenched steel sheet
a manufacturing method and steel sheet technology, applied in the field of automobile parts manufacturing methods, can solve the problems of high impact resistance, parts may require high strength, welded zones suffer from strength deterioration, etc., and achieve the effect of high dimensional accuracy
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first embodiment
[0033]FIG. 1 is a flowchart of a method of manufacturing an automobile part having different local strengths using steel sheets subjected to heat-treatment hardening in accordance with the present invention.
[0034]FIG. 2 shows an automobile part in each process of the method of manufacturing an automobile part in accordance with the first embodiment.
[0035]Referring to FIG. 1, a method of manufacturing an automobile part according to this embodiment includes:[0036]a blank sheet preparing process S-11 in which blank sheets are prepared from steel sheets subjected to heat-treatment hardening and having different thicknesses according to desired strength;[0037]a blank assembly forming process S-12 in which a blank assembly is formed by joining the blank sheets to each other via laser welding;[0038]a cold-forming process S-13 in which the blank assembly is subjected to cold-pressing; and[0039]a heat-treatment hardening process S-14 in which the cold-pressed part is heated to a temperature...
second embodiment
[0048]FIG. 3 is a flowchart of a method of manufacturing an automobile part having different local strengths using steel sheets subjected to heat-treatment hardening in accordance with the present invention.
[0049]FIG. 4 shows an automobile part in each process of the method of manufacturing an automobile part in accordance with the second embodiment.
[0050]When a part has a complex shape or a substantial forming depth, there is a high likelihood of damage of a steel sheet such as tearing during cold-forming.
[0051]The method according to the second embodiment may be applied to the case where it is difficult to form a final shape through cold-forming.
[0052]As shown in the drawings, the method of manufacturing an automobile part having different local strengths using steel sheets subjected to heat-treatment hardening includes:[0053]a blank sheet preparing process S-21 in which blank sheets are prepared from steel sheets subjected to heat-treatment hardening and having different thicknes...
third embodiment
[0066]FIG. 5 is a flowchart of a method of manufacturing an automobile part having different local strengths using steel sheets subjected to heat-treatment hardening in accordance with the present invention.
[0067]FIG. 6 shows an automobile part in each process of the method of manufacturing an automobile part in accordance with the third embodiment.
[0068]Unlike the embodiments described above, the method according to the third embodiment includes forming a desired shape of a part through hot-forming.
[0069]The method of manufacturing an automobile part having different local strengths according to the third embodiment includes:[0070]a blank sheet preparing process S-31 in which blank sheets are prepared from steel sheets subjected to heat-treatment hardening and having different thicknesses or different mechanical properties according to desired strength;[0071]a blank assembly forming process S-32 in which a blank assembly is formed by joining the blank sheets to each other via laser...
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Abstract
Description
Claims
Application Information
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