松江180拖拉機后橋殼精鏜組合機床及交互式公差配合標注系統設計

機械論文編號:JX517   論文字數:23810,頁數:54  有設計圖
SJ-180 tractor rear cross-body finish machining boring aggregate machine tool and design of interactive mark dimensional tolerance system
Abstract
     The paper consists of two parts, the design of aggregate machine tool and program in Auto CAD。
 The first part is overall design of SJ-180 tractor rear cross-body finish machining boring aggregate machine tool including brief introduction of aggregate machine tool, design steps of live axle axlebox，selection of tools and cutting dosage for aggregate machine tool。This paper describes establishment of technology planning, construction planning and three drawings systematically.
 The second part is the system design for interactive marking of tolerance on fit including submission and argument of the plan and establishment of relative programs where AutoLISP is adopted. Moreover an inquiry and marking program for tolerance and a pull-down menu are also proposed in this part.
 This paper resolves the problem about vanishing of the tolerance when dimension text is changed in Auto CAD and provides users with convenient marking commands for tolerance.
 
 Key-words：aggregate machine tool    mark    tolerance    Auto CAD

摘要
    這篇文章包含了組合機床設計和AutoCAD程序開發兩大部分。
 機床部分為松江180拖拉機后橋殼精鏜組合機床總體設計。這部分包含了組合機床的簡介，主軸箱的設計步驟，刀具和切削用量的選擇及組合機床的總體設計。論文中系統地論述了組合機床工藝方案的制定，結構方案的設計及聯系尺寸圖、加工示意圖、工序圖的繪制。
 程序部分為交互式公差配合標注系統的設計。這部分包括問題的提出，方案的論證，相關程序的設計。其中相關程序部分又包括設計語言的選擇，公差查詢程序設計，尺寸公差標注和拖動程序及下拉菜單的制作。文章中系統的講述了程序設計的方法。它解決了AutoCAD中，尺寸文本修改后，公差消失的問題，并且具有只需輸入基本尺寸和公差等級即可自動查詢出偏差值的功能，向AutoCAD使用者提供了一種簡便的公差標注的命令。其源程序見附錄。
關鍵字：組合機床，標注，公差， AutoCAD

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