摘要
为了有效提高抛丸除鳞效率,本文建立了单弹丸除鳞模型。利用有限元数值计算了弹丸冲击速度对鳞层破坏面积、基体塑形凹坑及残余应力的影响行为。结果表明:鳞层在很小的速度(5 m/s)冲击下即可发生破坏,弹丸冲击速度越大除鳞面积越大,同时也会造成基体应力/应变增加。弹丸冲击下鳞层失效区域由两部分构成,分别为弹丸冲击引起的直接失效区域与铁基体形变传递引起的间接失效区域,后者呈星状拓展。基体残留的塑性凹坑深度与冲击速度大致呈一次线性关系。现场实际生产中,应在满足表面粗糙度与残余应力要求的基础上选择较大的冲击速度。
To effectively improve the efficiency of shot blasting and descaling,blasting descaling model is established and a finite element numerical simulation is used to calculate the effect of the impact velocity of projectile on the failure area of the scale layer,base pits,and residual stress.Results show that scale can be destroyed,even at very small impact speeds such as 5 m/s.In addition,the descaled area increases with a higher projectile impact,but the matrix stress/strain increases.The failure area of the scale layer caused by the plastic impact consists of two parts:a direct failure area caused by projectile impact and an indirect failure zone caused by deformation transfer of the iron matrix;where the latter expands in a star-like pattern and the depth of plastic pits left in the matrix is approximately linear with the impact velocity.Therefore,to meet requirements of surface roughness and residual stress during actual site production,a larger impact velocity should be selected.
作者
王尚
杨莶
王晓晨
何海楠
单忠德
WANG Shang;YANG Quan;WANG Xiaochen;HE Hainan;SHAN Zhongde(Institute of Engineering Technology,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of Advanced Forming Technology and Equipment,China Academy of Machinery^Science and Technolog,Beijing 100083,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2018年第4期766-771,共6页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51604024)
国家"十二五"科技支撑计划(2015BAF30B01)
中央高校基本科研业务费专项资金项目(FRF-TP-15-001A1)
清华大学摩擦学国家重点实验室开放基金项目(SKLTKF16B11).
关键词
抛丸
冲击速度
弹丸冲击速度
鳞层
有限元仿真
失效区域
除鳞模型
shot blasting
impact velocity
blasting impact velocity
scale layer
finite element simulation
failure area
descaling model
作者简介
王尚（1981-),男，博士研究生；;通信作者：王晓晨，（1982-),男，副教授.E-mail;wangxiaochen@ustb.edu.cn.
