CAJ | 학술논문

以圆柱体大头位于中段和端部两种常见直长轴类模锻件为研究对象,运用数值模拟和物理实验相结合的方法,探讨了不经制坯直接终锻时坯料尺寸与填充效果的关系.结果表明:坯料截面积与锻件最大截面积之比F_0/F_1达到一定值时,按传统文献规定需要压肩的某些锻件,可直接终锻(材料利用率70%以上).卧锻较立锻易填充,中段大头较端部大头易填充.同时,验证了填充效果与变形速度有很大关系,实验结果为小尺寸模锻件工艺设计提供了参考价值.
이원주체대두위우중단화단부량충상견직장축류모단건위연구대상,운용수치모의화물리실험상결합적방법,탐토료불경제배직접종단시배료척촌여전충효과적관계.결과표명:배료절면적여단건최대절면적지비F_0/F_1체도일정치시,안전통문헌규정수요압견적모사단건,가직접종단(재료이용솔70%이상).와단교립단역전충,중단대두교단부대두역전충.동시,험증료전충효과여변형속도유흔대관계,실험결과위소척촌모단건공예설계제공료삼고개치.
By taking two typical straight-long-axle die forgings with big cylindrical head in the middle or in the end as the research objects, the relation of blank sizes and filling effect was investigated by combining numerical simulations and physics experiments when finish-forging directly without performing. The results show that some die forgings which need necking according to regulations of traditional literatures can finish-forge directly (stock utilization is more than 70%), when the ratios between the sectional area of blank and maximum sectional area of forgings (F_0/F_1 ratio) reaches to acertain value. The filling effect of forging horizontally is better than vertically, and forging with head in the middle is better than that in the end. Meanwhile, the great relation of filling effect and deformation velocity is verified and the results are expected to provide reference for the technological design of small die forgings.