摘要
分析了数控切割机床在切割链轮一段时间后,链轮相邻减重孔之间产生延迟裂纹的原因,并提出了应对措施。分析表明,火焰切割过程及冷却过程产生的残余应力是诱导裂纹的主要原因。通过板材预热、成品缓冷和后期局部回火处理等措施可有效防止裂纹产生。
Focuse on the reason of the delayed cracks between chain wheel holes after a period time of digital control cut ting, and point out the countermeasures. It shows that the residual stress of flame cutting process and cooling process is the main reason of the cracks. The delayed cracks can be effectively avoided by preheating, slowly cooling and local heating treatment in the late.
出处
《新技术新工艺》
2015年第9期114-115,共2页
New Technology & New Process
关键词
链轮
数控切割
延迟裂纹
残余应力
chain wheel, digital control cutting, delayed crack, residual stress
