圓孔拉刀在CAD系統(tǒng)中拉刀工作部分設計模塊、校核模塊設計 畢業(yè)論文，論文都通過學校答辯

圓孔拉刀CAD系統(tǒng)中拉刀工作部分設計模塊、校核模塊設計

　　　　
摘要：拉刀的結構復雜，數(shù)據繁多，普通的設計方法存在重復性勞動，標準程度低、周期長等缺點，所以用CAD設計拉刀具有重要意義。
　　　本文主要是用VBA對AutoCAD進行二次開發(fā)。首先選擇分層式拉刀，再選擇出容屑槽的形狀和種類，其中容屑系數(shù)K與被拉削的材料和切削厚度有關。不同的材料和厚度會造成K值的不同。接著輸入數(shù)據，用公式計算出切削余量。保證加工表面達到規(guī)定的尺寸精度和表面質量、拉刀有高的耐用度和壽命和拉刀的高生產率。再對拉刀分屑槽進行設計，分別用公式計算出分屑槽寬、分屑槽的個數(shù)。然后就是拉刀的校核模塊，計算出同時工作齒數(shù)，拉刀同時工作齒數(shù)最好介于3-7之間保證同時工作齒數(shù)在3-8齒以內。同時工作齒數(shù)大于8時，會使冷卻潤滑不充分，易使拉刀刀磨損或拉刀折斷。最后校核拉刀強度和拉床拉力，當拉刀直徑叫較大時，拉刀強度較大，使用時通常不用驗算強度。當拉刀直徑較小，使用條件改變時，應按計算公式進行強度驗算。為了保證拉刀正常工作，拉刀危險斷面初的應力必須小于拉刀材料的許用應力。其中計算所得到的拉削力，必須小于拉床的實際拉力。輸出校核結果。通過以上結果表明使用CAD設計拉刀可以提高拉刀的質量。

關鍵詞：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

目錄
1緒論 1
2開發(fā)工具的選擇 1
2.1AutoCAD簡介 1
2.2AutoCAD的新特性 3
2.3VBA的簡介 3
2.4AUTOCAD二次開發(fā)語言及工具介紹 4
2.5VBA開發(fā)CAD的簡介及選擇VBA開發(fā)CAD的原因 5
3圓孔拉刀工作部分CAD系統(tǒng)的設計 6
3.1圓孔拉刀工作部分CAD系統(tǒng)設計的流程框架 6
3.2拉刀設計模塊的系統(tǒng)構成圖 7
3.3拉刀設計模塊和校核模塊 7
3.3.8標題欄的填寫 12
3.4 拉刀的校核模塊 18
4應用舉例 21
5小結 22
參考文獻 23
致謝 24