圆孔拉刀_cad系统中拉刀工作部分设计模块、校核模块设计（毕业论文）.rar

圆孔拉刀在CAD系统中拉刀工作部分设计模块、校核模块设计 毕业论文，论文都通过学校答辩

圆孔拉刀CAD系统中拉刀工作部分设计模块、校核模块设计

　　　　
摘要：拉刀的结构复杂，数据繁多，普通的设计方法存在重复性劳动，标准程度低、周期长等缺点，所以用CAD设计拉刀具有重要意义。
　　　本文主要是用VBA对AutoCAD进行二次开发。首先选择分层式拉刀，再选择出容屑槽的形状和种类，其中容屑系数K与被拉削的材料和切削厚度有关。不同的材料和厚度会造成K值的不同。接着输入数据，用公式计算出切削余量。保证加工表面达到规定的尺寸精度和表面质量、拉刀有高的耐用度和寿命和拉刀的高生产率。再对拉刀分屑槽进行设计，分别用公式计算出分屑槽宽、分屑槽的个数。然后就是拉刀的校核模块，计算出同时工作齿数，拉刀同时工作齿数最好介于3-7之间保证同时工作齿数在3-8齿以内。同时工作齿数大于8时，会使冷却润滑不充分，易使拉刀刀磨损或拉刀折断。最后校核拉刀强度和拉床拉力，当拉刀直径叫较大时，拉刀强度较大，使用时通常不用验算强度。当拉刀直径较小，使用条件改变时，应按计算公式进行强度验算。为了保证拉刀正常工作，拉刀危险断面初的应力必须小于拉刀材料的许用应力。其中计算所得到的拉削力，必须小于拉床的实际拉力。输出校核结果。通过以上结果表明使用CAD设计拉刀可以提高拉刀的质量。

关键词：拉刀；AutoCAD；VBA；校核；

Hole Broach Broach CAD Work System Design Module And Check Module Design
Student name:zhou zicheng         class:0580224
         Supervisor:wang youyuan
ABSTRUCT：The broach structure is complicated , the data is numerous, physical labour there existing a repetitiveness in average design procedures, standard degree is low , the period often waits for a shortcoming , the broach has importance therefore using CAD to design that.
　　　This article is mainly used for VBA for AutoCAD second development. Broach choosing style with layers first, among them, the form holding the crumbs slot and kind choosing out again, hold crumbs modulus K and the material being broached and cut thickness in relation to. Different material and thickness diversity that can bring about K value. Proceed to import a data , use formula to secretly scheme against out the cutting margin. Ensure that the mass , broach processing the dimension accuracy and surface reaching regulation outside have high durable degree and life-span and pull the knife high production rate. Mark of crumbs slot carries out design on the broach again , uses formula to calculate out the number being allotted crumbs slot width , being allotted the crumbs slot respectively. And then it is a broach's to proofread a module, the guarantee at the same time job tooth calculating out the at the same time job tooth number , the broach at the same time job tooth number being situated between 3-7 best counts within 3-8 teeth. At the same time job tooth number greater than may use the lubricating insufficiency cooling down at 8 o'clock, the broach easy to make wears away or the broach breaks off. Proofread the broach intensity and broaching machine pulling force finally , think that the broach diameter shouts when bigger, the broach intensity is bigger , disuse the checking calculation intensity generally when being put into use. When thinking that the broach diameter is less , service conditions changes, respond to the checking calculation carrying out an intensity according to the formula secretly scheming against. Work for ensuring that the broach is regular.

Keyword:broach  AutoCAD  VBA  checking

目录
1绪论 1
2开发工具的选择 1
2.1AutoCAD简介 1
2.2AutoCAD的新特性 3
2.3VBA的简介 3
2.4AUTOCAD二次开发语言及工具介绍 4
2.5VBA开发CAD的简介及选择VBA开发CAD的原因 5
3圆孔拉刀工作部分CAD系统的设计 6
3.1圆孔拉刀工作部分CAD系统设计的流程框架 6
3.2拉刀设计模块的系统构成图 7
3.3拉刀设计模块和校核模块 7
3.3.8标题栏的填写 12
3.4 拉刀的校核模块 18
4应用举例 21
5小结 22
参考文献 23
致谢 24