空氣壓縮機曲軸零件的機械加工工藝及夾具設計

機械論文編號:JX021   包括設計論文和設計圖紙,字數:19834,頁數:59.

目 錄

摘   要 ...................................................................I
ABSTRACT ..................................................................I
1  緒  論 .................................................................1
2  零件分析 ...............................................................2
2.1零件的作用............................................................. 2
2.2零件的工藝分析......................................................... 2
2.3零件加工的主要問題和工藝過程設計分析................................... 2
3  工藝規程設計 ...........................................................5
3.1確定毛坯的制造形式 .....................................................5
3.2基面的選擇 .............................................................5
3.2.1 粗基準選擇.......................................................... 5
3.2.2 精基準的選擇 ........................................................5
3.3制定工藝路線........................................................... 5
3.4機械加工余量、工序尺寸及毛坯尺寸的確定................................. 7
3.5 確定切削用量及基本工時 ...............................................11
3.6 時間定額計算及生產安排 ...............................................31
4  專用夾具設計.......................................................... 40
4.1加工曲拐上端面油孔夾具設計 ............................................40
4.1.1定位基準的選擇...................................................... 40
4.1.2切削力的計算與夾緊力分析............................................ 40
4.1.3夾緊元件及動力裝置確定.............................................. 41
4.1.4鉆套、襯套及夾具體設計 ..............................................42
4.1.5夾具精度分析........................................................ 44
4.2加工曲拐上側面油孔夾具設計 ............................................45
4.2.1定位基準的選擇...................................................... 45
4.2.2切削力的計算與夾緊力分析 ............................................45
4.2.3夾緊元件及動力裝置確定.............................................. 46
4.2.4鉆套、襯套及夾具體設計 ..............................................47
4.2.5夾具精度分析 ........................................................48
4.3銑曲拐端面夾具設計.................................................... 49
4.3.1定位基準的選擇 ......................................................49
4.3.2定位元件的設計 ......................................................49
4.3.3銑削力與夾緊力計算 ..................................................50
4.3.4對刀塊和塞尺設計.................................................... 51
4  結  論 ................................................................53
參考文獻 .................................................................54
致  謝................................................................... 55

摘   要

此次畢業設計任務是對3L-10/8空氣壓縮機曲軸零件的機械加工工藝、夾具的設計,在曲軸零件的加工工藝過程中軸與軸中心線之間要有位置要求, 以毛坯軸兩端定位先加工兩中心孔,以兩端中心孔定位再粗、精加工各軸的表面，然后以粗、精后的兩軸徑定位鉆螺紋、銑鍵槽和銑曲拐端面，采用專用夾具加工兩斜油孔，最后粗、精磨各軸。
在夾具的設計過程中，主要以V形塊和支承板來定位，靠直壓板和彈簧來夾緊，鉆拐徑兩孔應采用長型快換鉆套，在鉆拐徑傾斜的孔時采用平面傾斜的夾具體，在鉆拐徑傾斜的孔時使用的是臥式鉆床，銑面時2個V形塊與銑刀不能干涉，因此V形塊高度要降低，夾具設計要方便、簡單。

關鍵詞  曲軸，加工工藝，夾具設計。

ABSTRACT

This graduation project duty is to the 3L-10/8 air compressor crank components machine-finishing craft, the jig design, between the crank components processing technological process middle axle and the axle must have the position request ,processes two center bores first by the semifinished materials axis both sides localization ,by both sides center bore localization again thick, precision work various axes surface.Then after thick, the essence two axle diameter localization drills the thread, the keyseat and the mill crank end surface.,uses the unit clamp to process two slanting oil holes, finally thick, correct grinding various axes.
    In the jig design process, mainly locates by V shape block and the support plate, depends on the straight clamp and the spring clamps, drills turns diameter two to be supposed to use long trades quickly drills the wrap, when drills turns the diameter incline hole uses the plane incline the jig body, when drills turns the diameter incline hole uses is the horizontal-type drilling machine, when face milling 2 V shape blocks and the milling cutter cannot interfere ,therefore V shape block altitude must reduce, the jig design must be convenient, be simple.

Key words  crank, processing craft, jig design.