CAJ | 학술논문

针对一级台阶凸模结构导致模具稳定性的问题，结合一级台阶凸模在冲裁过程中的受力特点，采用4阶经典Rung‐Kutta法，计算了算例中一级台阶凸模的力学模型的数值解，给出了随一级台阶凸模的弹性长度与刚性长度之比的变化的载荷参数的关系曲线。结果表明，当一级台阶凸模弹性长度与刚度长度之比变化不太大时，与其载荷参数呈现线弹性关系，提出了校核凸模长度需先确定凸模刃口的长度范围的观点，确定了一级台阶凸模刃口长度的上限和下限。
침대일급태계철모결구도치모구은정성적문제，결합일급태계철모재충재과정중적수력특점，채용4계경전Rung‐Kutta법，계산료산례중일급태계철모적역학모형적수치해，급출료수일급태계철모적탄성장도여강성장도지비적변화적재하삼수적관계곡선。결과표명，당일급태계철모탄성장도여강도장도지비변화불태대시，여기재하삼수정현선탄성관계，제출료교핵철모장도수선학정철모인구적장도범위적관점，학정료일급태계철모인구장도적상한화하한。
To analyze the stability problem of die structure caused by the step punch ,the nu‐merical solution of the mechanical model of the step punch is calculated .The stress charac‐teristic of the step punch in the stamping process is considered and the classic 4 order Rung‐Kutta method is adopted in this calculation .The relationship between the loading parameter and the ratio of elastic length to rigid length of the step punch is obtained .It shows that when the change of this length ratio is not large ,the loading parameter is linearly related to the length ratio .It is notable that cutting edge length should be specified before checking the punch length .According to the result ,the upper and lower limit of the cutting edge length of the punch is determined .