机械5

KST1015叉杆的加工工艺及铣60前上端面夹具设计 摘要 夹具在机械加工中起着重要的作用，它直接影响着机械加工的质量，生产效率和成本，因此，夹具设计是机械工艺准备和施工中的一项重要工作。本文对KST1015叉杆的结构和工艺进行了分析，确定了机械加工工艺路线，制订出了零件的铸造工艺方案和机械加工工艺规程，并为加工零件60前端面设计了一套专用铣床夹具。 专用夹具的设计内容有定位方案、定位元件的选择与确定；夹紧方案、夹紧元件的选择与确定；夹具体的设计；铣削力以及夹紧力的计算与分析等。最后，通过CAD绘图软件完成夹具装配图及夹具体零件图的绘制。 通过本次设计在保证产品质量、提高劳动生产率、降低成本、缩短生产周期及改善劳动条件等方面有了较大的改观。 关键词：KST1015、工艺、60前端面、铣床夹具 Abstract Fixture plays a
n importa
nt role i
n mecha
nical processi
ng, it directly affects the quality of mecha
nical processi
ng, productio
n efficie
ncy a
nd cost. Therefore, fixture desig
n is a
n importa
ntwork i
n mecha
nical process preparatio
n a
nd co
nstructio
n. I
n this paper, the structure a
nd tech
nology of KST1015 fork rod are a
nalyzed, the machi
ni
ng process route is determi
ned, the casti
ng process scheme a
nd machi
ni
ng process regulatio
ns areworked out, a
nd a set of special milli
ng fixture is desig
ned for machi
ni
ng the fro
nt face of part 60. The desig
n co
nte
nts of special fixture i
nclude positio
ni
ng scheme, selectio
n a
nd determi
natio
n of positio
ni
ng eleme
nt, selectio
n a
nd determi
natio
n of clampi
ng scheme a
nd clampi
ng eleme
nt, desig
n of fixture body, calculatio
n a
nd a
nalysis of milli
ng force a
nd clampi
ng force, etc. Fi
nally, through the CAD drawi
ng software, the fixture assembly drawi
ng a
nd the drawi
ng of specific parts drawi
ngs are completed. Through this desig
n,we have made great cha
nges i
n e
nsuri
ng product quality, improvi
ng labor productivity, reduci
ng costs, shorte
ni
ng productio
n cycle a
nd improvi
ng labor co
nditio
ns. Keywords: KST1015, process, 60 fro
nt e
nd, milli
ng fixture 目录 摘要I Abstract II 1零件的工艺性分析1 1.1零件的组成表面、技术要求及形位公差分析1 1.1.1零件的组成表面分析1 1.1.2零件的技术要求分析1 1.1.3零件的形位公差分析1 1.2零件的作用2 1.3零件的工艺性审查3 1.4确定零件的生产类型4 2拟定零件工艺路线及确定毛坯5 2.1选择定位基准5 2.1.1粗基准的选择5 2.1.2精基准的选择5 2.2工序顺序的安排原则5 2.3制定工艺路线6 2.3.1工艺路线方案1 6 2.3.2工艺路线方案2 6 2.3.3工艺路线的分析、确定7 2.4零件毛坯的确定7 2.5机床、夹具、刀具及量具的确定8 2.6零件加工余量的确定9 2.7切削用量及时间定额的计算10 3专用夹具设计25 3.1问题的提出25 3.2设计思想25 3.3定位方案和定位元件的确定25 3.4夹紧方案和夹紧元件的确定27 3.5夹具体的设计27 3.6确定导向装置28 3.7铣削力计算28 3.8夹紧力计算29 3.9定位误差分析29 结论31 致谢32 参考文献33