Design a precision electroplating mechanical structure for automobiles based on finite element analysis method and analyze its mechanical properties.Taking the automobile steering knuckle as the research object,ABAQUS...Design a precision electroplating mechanical structure for automobiles based on finite element analysis method and analyze its mechanical properties.Taking the automobile steering knuckle as the research object,ABAQUS parametric modeling technology is used to construct its three-dimensional geometric model,and geometric simplification is carried out.Two surface treatment processes,HK-35 zinc nickel alloy electroplating and pure zinc electroplating,were designed,and the influence of different coatings on the mechanical properties of steering knuckles was compared and analyzed through numerical simulation.At the same time,standard specimens were prepared for salt spray corrosion testing and scratch method combined strength testing to verify the numerical simulation results.The results showed that under emergency braking and composite working conditions,the peak Von Mises stress of the zinc nickel alloy coating was 119.85 MPa,which was lower than that of the pure zinc coating and the alkaline electroplated zinc layer.Its equivalent strain value was 652×10^(-6),which was lower than that of the pure zinc coating and the alkaline electroplated zinc layer.Experimental data confirms that zinc nickel alloy coatings exhibit significant advantages in stress distribution uniformity,strain performance,and load-bearing capacity in high stress zones.The salt spray corrosion test further indicates that the coating has superior corrosion resistance and coating substrate interface bonding strength,which can significantly improve the mechanical stability and long-term reliability of automotive precision electroplating mechanical structures.展开更多
由于国内门窗窗型加工设备大多处于半自动化状态,更多依赖于国外进口设备,且存在着加工效率不高、精度低等缺陷,因此提出了门窗材双端刨铣自动换刀加工中心的设计。通过对门窗材双端端头铣型加工工艺分析,完成门窗材双端刨铣自动换刀加...由于国内门窗窗型加工设备大多处于半自动化状态,更多依赖于国外进口设备,且存在着加工效率不高、精度低等缺陷,因此提出了门窗材双端刨铣自动换刀加工中心的设计。通过对门窗材双端端头铣型加工工艺分析,完成门窗材双端刨铣自动换刀加工中心结构总体布局,利用Solidworks软件对加工中心端头铣削结构进行实体建模,确定了加工中心端头铣削结构主机总体结构,并对齐头锯、端头粗铣铣削主轴的切削力和切削功率进行设计计算,得到主锯电机功率7.5 k W、铣削主轴铣削电机功率为7.5 k W,符合加工功率要求,并完成齐头锯组件、粗铣主轴组件、精铣主轴组件、榫头铣座送料结构、刀具位置调整机构、主机机架等结构的设计以及外购件的选型,最后运用ANSYS对粗铣铣削主轴进行静力学分析,得到主轴的应力、应变和变形云图,其最大应力值为10.305 MPa、最大应变值为0.051 527 mm/m、最大变形量为0.010 946 mm,且最大强度、刚度以及变形均在安全范围内,验证了铣削主轴满足设计要求。设计的自动换刀加工中心结构简单,能一次完成门窗材两边齐头、端头铣型工序,自动化程度高,效率高。展开更多
文摘Design a precision electroplating mechanical structure for automobiles based on finite element analysis method and analyze its mechanical properties.Taking the automobile steering knuckle as the research object,ABAQUS parametric modeling technology is used to construct its three-dimensional geometric model,and geometric simplification is carried out.Two surface treatment processes,HK-35 zinc nickel alloy electroplating and pure zinc electroplating,were designed,and the influence of different coatings on the mechanical properties of steering knuckles was compared and analyzed through numerical simulation.At the same time,standard specimens were prepared for salt spray corrosion testing and scratch method combined strength testing to verify the numerical simulation results.The results showed that under emergency braking and composite working conditions,the peak Von Mises stress of the zinc nickel alloy coating was 119.85 MPa,which was lower than that of the pure zinc coating and the alkaline electroplated zinc layer.Its equivalent strain value was 652×10^(-6),which was lower than that of the pure zinc coating and the alkaline electroplated zinc layer.Experimental data confirms that zinc nickel alloy coatings exhibit significant advantages in stress distribution uniformity,strain performance,and load-bearing capacity in high stress zones.The salt spray corrosion test further indicates that the coating has superior corrosion resistance and coating substrate interface bonding strength,which can significantly improve the mechanical stability and long-term reliability of automotive precision electroplating mechanical structures.
文摘由于国内门窗窗型加工设备大多处于半自动化状态,更多依赖于国外进口设备,且存在着加工效率不高、精度低等缺陷,因此提出了门窗材双端刨铣自动换刀加工中心的设计。通过对门窗材双端端头铣型加工工艺分析,完成门窗材双端刨铣自动换刀加工中心结构总体布局,利用Solidworks软件对加工中心端头铣削结构进行实体建模,确定了加工中心端头铣削结构主机总体结构,并对齐头锯、端头粗铣铣削主轴的切削力和切削功率进行设计计算,得到主锯电机功率7.5 k W、铣削主轴铣削电机功率为7.5 k W,符合加工功率要求,并完成齐头锯组件、粗铣主轴组件、精铣主轴组件、榫头铣座送料结构、刀具位置调整机构、主机机架等结构的设计以及外购件的选型,最后运用ANSYS对粗铣铣削主轴进行静力学分析,得到主轴的应力、应变和变形云图,其最大应力值为10.305 MPa、最大应变值为0.051 527 mm/m、最大变形量为0.010 946 mm,且最大强度、刚度以及变形均在安全范围内,验证了铣削主轴满足设计要求。设计的自动换刀加工中心结构简单,能一次完成门窗材两边齐头、端头铣型工序,自动化程度高,效率高。
