摘要 零件的加工工艺编制，在机械加工中占有非常重要的地位，零件工艺编制得合不合理，这直接关系到零件最终能否达到质量要求；夹具的设计也是不可缺少的一部分，它关系到能否提高其加工效率的问题。因此这两者在机械加工行业中是至关重要的环节。 在机床上对零件进行机械加工时，为保证工件加工精度，首先要保证工件在机床上占有正确的位置，然后通过夹紧机构使工件在正确位置上固定不动，这一任务就是由机床夹具完成。对于单件、小批量生产，应尽量使用通用夹具，这样可以降低工件的生产成本。但是由于通用夹具适用各种工件的装夹，所以夹紧时往往比较费时间，并且操作复杂，生产效率低，也难以保证加工精度，为此需设计专用夹具。 本次设计内容涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。 关键词：工艺，工序，切削用量，夹紧，定位，误差 Title： Cw5-120 press commutator assembly process a
nd fixture desig
n Abstract：Part of the preparatio
n processi
ng, i
n processi
ng machi
nery occupies very importa
nt positio
n, part process system is reaso
nable, which is directly related to the fi
nal part quality requireme
nts ca
n be met; fixture desig
n is a
n i
ndispe
nsable part of, it is related to ca
n improve the efficie
ncy of the problem. Therefore both i
n the mecha
nical processi
ng i
ndustry is a vital li
nk. I
n machi
ne tool of mecha
nical parts of the process, i
n order to e
nsure the processi
ng precisio
n of the workpiece, first of all to guara
ntee the workpiece holds the correct positio
n o
n the machi
ne, the
n by clampi
ng the workpiece i
n the correct positio
n is fixed, this task is by the machi
ne tool fixture. For si
ngle a
nd small batch productio
n, the use of u
niversal fixture should be as far as possible, so that the productio
n cost of the workpiece ca
n be reduced. But because the u
niversal fixture is suitable for various workpiece clampi
ng, so clampi
ng te
nd to spe
nd more time a
nd the operatio
n is complex, the productio
n efficie
ncy is low, it is difficult to guara
ntee machi
ni
ng accuracy, so it is
necessary to desig
n a special fixture. The desig
n co
nte
nt i
nvolves the mecha
nical ma
nufacturi
ng process a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce a
nd measureme
nt a
nd other aspects of k
nowledge. Keywords ： process, process, cutti
ng dosage, clampi
ng, positio
ni
ng 目录 1序言3 2零件的分析4 2.1零件的形状4 2.2零件的工艺分析5 3工艺规程设计6 3.1确定毛坯的制造形式6 3.2基面的选择6 3.3制定工艺路线6 3.4选择加工设备和工艺装备7 3.4.1机床选用7 3.4.2选择刀具8 3.5确定切削用量及基本工时8 4夹具设计9 4.1研究原始质料9 4.2定位、夹紧方案的选择9 4.3切削力及夹紧力的计算10 4.4误差分析与计算11 4.5钻套、衬套、钻模板设计与选用12 4.6确定夹具体结构尺寸和总体结构12 参考文献13