机械5

前刹车调整臂外壳的机械加工工艺及钻Ф13孔及Ф16锪孔夹具设计 摘要 夹具的作用是将工件定位，以使加工工件获得相对于机床和刀具的正确位置，并把工件可靠地夹紧。夹具的利用率高，经济性好，使用元件的功能强并且数量少，缩短停机时间、提高生产效率。所以夹具的设计是必不可少。 本次设计的题目是外壳-前刹车调整臂的机械加工工艺及钻削Ф13圆柱孔及Ф16锪孔夹具设计。外壳-前刹车调整臂对前刹车调整臂进行支撑保护。结合零件加工的重点和难点，从零件的结构分析入手，合理的进行定位基准选择、夹具的设计、各种刀具参数选择以及切削用量的选择等。在安排工艺过程时，根据加工要求不同，需要粗精加工分开。另外还确定了切削参数，工时定额，并填写了工序卡片。还设计了一套钻削Ф13圆柱孔及Ф16锪孔的夹具，并进行了定位误差分析。 关键词：外壳、前刹车调整臂、Ф13、Ф16、钻削 Abstract The fu
nctio
n of the fixture is to locate the workpiece so that the workpiece ca
n be positio
ned correctly relative to the machi
ne tool a
nd cutter, a
nd the workpiece ca
n be clamped reliably. The fixture has the adva
ntages of high utilizatio
n rate, good eco
nomy, stro
ng fu
nctio
n a
nd less qua
ntity of compo
ne
nts, shorte
ni
ng dow
ntime a
nd improvi
ng productio
n efficie
ncy. Therefore, fixture desig
n is esse
ntial. The subject of this desig
n is shell-fro
nt brake adjusti
ng arm machi
ni
ng tech
nology a
nd drilli
ng_13 cyli
ndrical holes a
nd_16 holes clamp desig
n. The shell fro
nt brake adjuster supports the fro
nt brake adjustme
nt arm. Combi
ni
ng with the key a
nd difficult poi
nts of parts processi
ng, starti
ng from the structural a
nalysis of parts, reaso
nable selectio
n of positio
ni
ng datum, fixture desig
n, various tool parameters selectio
n a
nd cutti
ng parameters selectio
n. Whe
n arra
ngi
ng the tech
nological process, rough fi
nishi
ng is required to separate accordi
ng to differe
nt processi
ng requireme
nts. I
n additio
n, the cutti
ng parameters a
nd worki
ng hours quota were determi
ned, a
nd the process cards were filled out. A fixture for drilli
ng 13 cyli
ndrical holes a
nd 16 spot holes is also desig
ned, a
nd positio
ni
ng error a
nalysis is carried out. Key words shell, fro
nt brake adjusti
ng arm, 13, 16, drilli
ng 目录 摘要I Abstract II 第一章绪论1 1.1夹具概念1 1.2夹具的分类1 1.2.1按夹具的通用特性分类1 1.2.2按夹具的动力源分类2 第二章零件的分析3 2.1零件的作用3 2.2零件的组成表面、加工要求、技术要求分析3 2.2.1零件的组成表面3 2.2.2零件的加工要求4 2.2.3零件的技术要求4 第三章零件的工艺规程设计5 3.1确定毛坯的制造形式5 3.2基准的选择与确定5 3.3加工工艺路线的确定6 3.3.1工艺路线方案一6 3.3.2工艺路线方案二6 3.3.3工艺路线的确定7 3.4加工机床及加工装备的选择7 3.5确定加工余量9 4.2计算切削用量及基本时间10 第四章专用夹具设计25 4.1定位方案及装置的确定25 4.1.1设计定位方案应满足的要求25 4.1.2定位方案和装置的确定25 4.2夹紧方案及装置的确定26 4.2.1设计夹紧装置应遵循的原则26 4.2.2夹紧方案及装置的确定26 4.3夹具体的设计26 4.4导向装置—钻套的确定27 4.5钻削力的计算27 4.6夹紧力的计算28 4.7定位误差的分析29 结论30 致谢31 参考文献32