WARM PRESS FORMING METHOD, FORMING DIE USED IN THE WARM PRESS FORMING METHOD, AND VEHICULAR SKELETON COMPONENT

摘要

PROBLEM TO BE SOLVED: To provide a warm press forming method capable of improving dimensional accuracy in a panel, and capable of easily providing a desired mechanical characteristic in a press-formed product, by suppressing a shape change such as a spring-back.SOLUTION: When forming a steel plate having a tensile strength of 440 MPa or more into a press-formed product having a flange part, the steel plate is heated in a temperature range of 400-700°C, and then, a punch and a die are prepared, and the steel plate is formed by using a press machine having a wrinkle suppresser when necessary, and in this case, the punch, the die or the wrinkle suppresser provided with a steel plate temperature drop-suppressing groove in a contact part with the steel plate, is used for at least one of the punch, the die and the winkle suppresser.