前剎車調(diào)整臂外殼的加工工藝及夾具的設(shè)計

摘   要
本次設(shè)計研究的課題是解放牌汽車前剎車調(diào)整臂外殼零件的加工工藝及專用夾具的設(shè)計?？紤]零件在汽車運行時的剎車過程中所受沖擊不大，零件結(jié)構(gòu)又比較簡單，故選擇鑄件毛坯。它的主要加工面是各孔、前剎車調(diào)整臂外殼的端面和通槽，在加工中由于面的加工精度要比孔的加工精度容易保證。因此，在設(shè)計中采用先面后孔的原則，并將孔與平面的加工劃分為粗加工和精加工階段，以保證加工精度。在本次設(shè)計中，先以R41外圓和R16外圓輪廓為粗基準(zhǔn)加工出兩端面，再以該基準(zhǔn)面定位加工φ12和φ62的孔。在后面的工序中，均以該孔與端面為定位基準(zhǔn)，再加工出前剎車調(diào)整臂外殼零件的其它孔、槽和端面，在整個加工過程中，主要采用了銑床、鉆床和插床。本次夾具的設(shè)計選擇了第六道工序中鉆φ13和φ13.8孔專用夾具的設(shè)計，對其采用了“一面兩孔”的定位方式。

關(guān)鍵詞：前剎車調(diào)整臂外殼零件；加工工藝；專用夾具；定位；夾緊

Abstract
The task for design is the adjustment arm shell parts for braking of the processing technology boom and exclusive fixture design, which is in the front of the car called jiefang brand. Considering the parts in the machine not hitting seriously relatively simple structure, so I choose rough castings. The main processing is the hole surface, adjusting the number of face and arm slot, in the process of machining accuracy due to face processing than the hole to ensure the accuracy of easily. Therefore, the use in the design after the first hole of the principle of surface and hole and two-dimensional processing is divided into roughing and finishing stages to ensure the machining accuracy. In this design, the first R41 and R16 at both ends of the cylindrical surface processing, and then base-level processing of the holeof φ  and φ . The processes behind both holes with the end of the baseline for positioning, processing to adjust the arm holes, slots, and some face in the whole process, mainly the use of the milling machine, drilling machine and slotting machine. And for the design of dedicated fixture I choose the sixth procedure, which drills the holes of φ  and φ , the location are decided by the “one side and two holes”.

Keywords: the adjustment arm shell parts for braking; processing technology; the dedicated fixture; positioning; clamping

目錄
摘   要 I
Abstract II
第一章 緒論 1
1.1機(jī)械加工工藝的發(fā)展現(xiàn)狀 1
1.2現(xiàn)代機(jī)械加工工藝的發(fā)展趨勢 1
1.3機(jī)床夾具的發(fā)展現(xiàn)狀 3
1.4現(xiàn)代機(jī)床夾具的發(fā)展趨勢 3
第二章  零件的分析 6
2.1零件的作用 6
2.2零件的工藝分析 6
第三章  零件毛坯的選擇 7
3.1確定毛坯的制造形式 7
3.2確定鑄件機(jī)械加工余量及形狀 7
3.3確定鑄件加工表面尺寸及偏差 8
第四章 工藝規(guī)程的設(shè)計 9
4.1基面的選擇 9
4.2擬訂工藝過程 9
4.3加工設(shè)備和工藝裝備的選擇 12
4.4確定工序尺寸 16
4.5確定切削用量及時間定額 19
第五章  夾具設(shè)計 31
5.1夾具設(shè)計任務(wù)的提出 31
5.2夾具的結(jié)構(gòu)方案確定 31
5.3夾具設(shè)計及操作的簡要說明 38
參考文獻(xiàn) 39
結(jié)束語 40
致謝 41