小尺寸链轮成形工艺分析及模具设计
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摘要
通过分析链轮现有成形工艺,并结合零件成形特点,采用挤压成形工艺,有效提高材料利用率,减少了加工工序.基于Solid Works simulation插件,对挤压成形后的链轮进行受力分析,主要从链轮与滚子的啮合,以及链轮内圈棘轮与棘爪的接触方面做试验.结果表明:小链轮外圈与滚子在啮合上没有应力集中现象,最大合应力处为0. 094 MPa,最小处应力为0. 008 MPa;而内圈棘轮与棘爪载荷在齿形上的分布主要集中在链轮轴向端面上,轮齿所受最大合应力为0. 322 MPa,最小合应力为0. 146 MPa,应变量不大,两项测试均在规定范围内.说明链轮强度足以抵抗其受力时的塑性变形,符合设计要求.
By analyzing the existing forming process of the sprocket based on the forming characteristics of the parts,the extrusion forming process of the near net forming is adopted to effectively improve the material utilization rate and reduce the processing steps.SolidWorks software is used for modeling.Then based on the SolidWorks simulation plugin,the formed sprocket after extrusion is subjected to force analysis,mainly from the aspects of the meshing of the sprocket and the roller,and the contact of the ratchet and the pawl in the inner ring of the sprocket.The results show that there is no stress concentration on the outer ring of the small sprocket and the roller.The maximum combined stress is0.094 MPa and the minimum is 0.008 MPa.The distribution of the ratchet and pawl load on the tooth profile is mainly concentrated on the tooth profile.On the axial end face of the sprocket,the maximum combined stress of the gear teeth is 0.322 MPa,while the minimum is 0.146 MPa,and the dependent variable is not large.Both tests are within the specified range.It is concluded that the sprocket is strong enough to resist the plastic deformation when it is under stress,which meets the design requirements.
By analyzing the existing forming process of the sprocket based on the forming characteristics of the parts,the extrusion forming process of the near net forming is adopted to effectively improve the material utilization rate and reduce the processing steps.SolidWorks software is used for modeling.Then based on the SolidWorks simulation plugin,the formed sprocket after extrusion is subjected to force analysis,mainly from the aspects of the meshing of the sprocket and the roller,and the contact of the ratchet and the pawl in the inner ring of the sprocket.The results show that there is no stress concentration on the outer ring of the small sprocket and the roller.The maximum combined stress is0.094 MPa and the minimum is 0.008 MPa.The distribution of the ratchet and pawl load on the tooth profile is mainly concentrated on the tooth profile.On the axial end face of the sprocket,the maximum combined stress of the gear teeth is 0.322 MPa,while the minimum is 0.146 MPa,and the dependent variable is not large.Both tests are within the specified range.It is concluded that the sprocket is strong enough to resist the plastic deformation when it is under stress,which meets the design requirements.
引文
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[2]梁炳文.冷冲压工艺手册[M].北京:北京航空航天大学出版社,2004.
[3]赵柏森,韦光珍,张玉平.汽车侧围内板冲压成型技术仿真与应用[J].金属铸锻焊技术,2011,40(13):79-81.
[4]倪昀,黄亚玲,章跃洪.基于DYNAFORM汽车覆盖件冲压仿真分析[J].热加工工艺,2011,40(6):109-111.
[5]Liu Y Q.Quantitative for springback of unloading and trimming in sheet metal stamping forming[J].Chin J Mech Eng,2013,16(2):190-192.
[6]Zhang Y L,LI Y.Numerical simulation and analysis of solidliquid two-phase flow in centrifugal pump[J].Chin J Mech Eng,2013,26(1):53-60.
[7]俞汉清.金属塑性成形原理[M].北京:机械工业出版社,1999.
[8]陈文亮.板料成形CAE分析教程[M].北京:机械工业出版社,2005.
[9]Yao R,Zhu W B,Huang P.Accuracy analysis of stewart platform based on interval analysis method[J].Chin J Mech Eng,2013,26(3):29-34.
[10]张稳定,佘威,黄永生.基于有限元的S形梁错位拼焊板拉深实例研究[J].锻压技术,2015,40(8):20-23.
[11]徐迎强,薛克敏,周结魁,等.基于智能优化的覆盖件回弹控制[J].塑性工程学报,2011,16(5):64-69.