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复合气压砂轮有限元仿真与光整试验研究

ISSN号：1001-4551
期刊名称：机电工程
时间：2014
页码：549-552+567
分类：TH117[机械工程—机械设计及理论]
作者机构：[1]浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室,浙江杭州310014
相关基金：国家自然科学基金资助项目（51175471,50575208,51205358）;浙江省自然科学基金资助项目（LQ12E05014）;浙江省教育厅资助项目（Y201225547）
相关项目：基于复合弹性研抛盘的非晶薄膜衬底分级研抛新方法研究

关键词：复合气压砂轮, 丁苯橡胶, 滚动接触, 有限元法, 光整试验, composited pneumatic wheel, styrene-butadiene rubber（SBR） , rolling contact, finite element, finishing experiment

中文摘要：

为了提高气压砂轮针对激光强化模具的光整效率,解决加工过程中高频小幅振动及长时间交变应力作用引起的气压砂轮基体产生细微裂纹的问题,设计了芳纶浆粕（PPTA-pulp）增强丁苯橡胶的复合气压砂轮基体.通过对标准试样的轴向拉伸试验,得到了复合气压砂轮基体的应力—应变关系和弹性模量,利用ANSYS/LS—DYNA有限元仿真软件对复合气压砂轮的模态与应力分布特性进行了数值仿真,得到了各阶模态的频率与接触应力分布曲线；通过激光强化Cr12模具的光整加工试验,验证了仿真的正确性.研究结果表明,随着芳纶浆粕含量的增加,复合气压砂轮各阶频率得到了显著提高,且应力分布均匀性变好,提升了对高硬度、高耐磨性模具的高效加工能力；当添加3.3％的芳纶浆粕时,兼顾了仿形接触能力和应力分布的均匀性,因而能较好地满足激光强化曲面模具的光整加工.

英文摘要：

In order to improve the finishing efficiency of pneumatic wheel for laser hardening mold,and solve the subtle crack problem of pneumatic wheel caused by high frequency vibration and prolonged pressure during the long time finishing,a composite pneumatic wheel of SBR reinforced by PPTA-pulp was designed.Through the axial tensile test of the standard sample,the stress-strain relationship and the elastic modulus of composite pneumatic wheel were received.Using ANSYS/LS-DYNA the modal and stress distribution of composite pneumatic wheel were simulated,the distribution curve of the modal frequency and contact stress were received.According to the finishing experiment of laser hardening mold,the correctness of the simulation was verified.The results show that the frequency of the composite pneumatic wheel has been improved significantly,and the stress distribution is uniform,so as to improve the finishing efficiency for mold with high hardness and wear resistance.If adding 3.3％ PPTA-pulp,both the profile ability and the stress distribution would be preferable.That could be better for the laser hardening mold finishing.

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