机械5

基于UG系统圆柱直齿轮的二次开发 摘要 齿轮是各种机械传动设备中常用的零件，随着CAD/CAM技术的发展,使用计算机对齿轮进行设计与分析已成为一种重要的研究手段。齿轮三维模型是进行有限元分析，机构仿真和数控加工等必不可少的环节。目前一些三维造型软件如UG都不能直接生成齿轮的三维模型，另外齿轮的设计计算过程复杂，这些都影响了设计效率。本课题的主要任务是基于UG开发直齿圆柱齿轮CAD系统，从而简化齿轮建模过程,提高了效率,丰富了零件建模方法。 通过调研和查阅相关文献，掌握参数化建模、齿轮设计的基础知识，明确系统的各 功能模块作用，运用UG二次开发原理和方法及相关的程序设计方法来进行系统的开发。 以能满足根据用户输入的原始参数来计算相关的结构参数，然后绘制三维模型。 在分析了标准渐开线直齿轮设计模型的基础上，主要通过使用UG/ ope
n系列的UG二次开发工具GRIP语言来编写程序以实现相关的参数化建模。 本次齿轮CAD系统方案的设计，还可增加齿轮设计计算校核模块及参数化造型模 块来完善，以致能根据用户输入的原始参数（功率、转速、传动比等），计算设计相关结构参数，并进行齿面接触强度、齿根弯曲强度设计计算和校核（在计算过程中，系统自动选择相关图表参数），最后绘制三维模型。 关键字：UG/ ope
n GRIP；直齿圆柱齿轮；参数化设计；二次开发；渐开线；菜单 Abstract Gear is avariety of mecha
nical tra
nsmissio
n equipme
nt used i
n the parts,with the developme
nt of CAD/CAM tech
nology, the use of computer desig
n a
nd a
nalysis of gear has become a
n importa
nt research method. The three-dime
nsio
nal model of gear is a
n esse
ntial li
nks,which i
n fi
nite eleme
nt a
nalysis, i
nstitutio
ns, NC machi
ni
ng simulatio
n a
nd so o
n. Some three-dime
nsio
nal modeli
ng software, such as the UG ca
n
not directly ge
nerate three-dime
nsio
nal model of gear, a
nd the desig
ni
ng calculatio
n process of gear is complexity,which affected the efficie
ncy of desig
ni
ng. The mai
n task of this subject is based o
n the developed CAD system of UG spur gear,which simplifies the process of modeli
ng gear, improved efficie
ncy, e
nriched parts modeli
ng. To master theways of parametric modeli
ng, the basic k
nowledge of gear desig
ni
ng a
nd the role of thevarious fu
nctio
nal modules is
nessesary through researchi
ng a
nd related literature. To developme
nt this system by the seco
ndary developme
nt of the use of UG pri
nciples, methods a
nd procedures related to system desig
n. Whe
n the user i
nput parameters, it ca
n calculate the structure of the releva
nt parameters, a
nd the
n draw three-dime
nsio
nal model. After a
nalyzi
ng the sta
ndard of i
nvolutes spur gearwhich is based o
n the desig
ni
ng model, i
n order to achieve the releva
nt parametric modeli
ng,we compile the program by the use of UG/ope
n series, seco
ndary developme
nt tools a
nd its programmi
ng la
nguage. It ca
n also become better by i
ncreasi
ng the parametric modules of the calculatio
n a
ndverificatio
n of gear desig
ni
ng,which ca
n calculate the desig
ni
ng parameters of structure, the i
nte
nsity of tooth co
ntact, a
nd the stre
ngth desig
n calculatio
n a
nd check of root be
ndi
ng of tooth(the systemwill select the releva
nt parameters of the chart automatically i
n the calculatio
n process),with the origi
nal parameters(power, speed, tra
nsmissio
n ratio, etc.), a
nd the
n fi
nish the drawi
ng of three-dime
nsio
nal model. Keywords: UG/ope
n GRIP; spur gear; parametric desig
n; seco
ndary developme
nt; i
nvolute; me
nu 目录 引言……………………………………………………………………………1 1 UG/Ope
n开发工具简介……………………………………………………1 1.1 UG/Ope
n GRIP………………………………………………………………………1 1.2 UG/Ope
n API………………………………………………………………………2 1.3 UG/Ope
n Me
nScript…………………………………………………………………2 1.4 UG/Ope
n UIStyler……………………………………………………………………3 1.5 User Tools工具………………………………………………………………………3 1.6二次开发工具之间的相互关系………………………………………………………4 2总体方案的拟定………………………………………………………4 2.1齿轮分析………………………………………………………………………………4 2.1.1齿轮的分类…………………………………………………………………………5 2.1.2齿轮的失效形式……………………………………………………………………6 2.1.3齿轮的设计准则……………………………………………………………………7 2.2方案的分析与确定……………………………………………………………………8 2.2.1方案一………………………………………………………………………………8 2.2.2方案一………………………………………………………………………………9 2.2.3方案的确定…………………………………………………………………………10 3直齿圆柱齿轮的参数化建模……………………………………………10 3.1直齿圆柱齿轮的尺寸…………………………………………………………………10 3.1.1几何尺寸……………………………………………………………………………10 3.1.2结构尺寸……………………………………………………………………………11 3.2基准曲线………………………………………………………………………………13 3.3渐开线齿廓的形成……………………………………………………………………14 3.3.1渐开线方程的推导…………………………………………………………………14 3.3.2渐开线的绘制………………………………………………………………………15 3.3.3镜像中心的确定……………………………………………………………………15 3.3.4完整的齿轮造型……………………………………………………………………15 4插件设计及应用实例……………………………………………………16 4.1插件设计……………………………………………………………………………16 4.1.1设计程序框图………………………………………………………………………16 4.1.2模块的设计…………………………………………………………………………17 4.1.2.1用户菜单模块的设计…………………………………………………………17 4.1.2.2人机交互窗口的设计…………………………………………………………18 4.1.2.3齿轮模块的设计………………………………………………………………19 4.2插件应用实例………………………………………………………………………28 5结论………………………………………………………………………29 谢辞…………………………………………………………………………30 参考文献……………………………………………………………………31