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前刹车调整臂外壳的钻M8螺纹孔夹具设计及机械加工工艺规程装备含4张CAD图+说明书

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A-4-外壳-前刹车调整臂-零件图A3

前刹车调整臂外壳的机械加工工艺及钻M8螺纹孔夹具设计
摘要
夹具是零件加工中必不可少的装置。夹具利用率高，经济性好，对功能组件的使用和数量少。随着零件种类、外形及尺寸的种类越来越多，设计一套专用夹具非常有必要。
本次设计的主要内容是外壳-前刹车调整臂的机械加工工艺及钻削M8螺纹孔夹具设计。设计之初查阅相关数据及国内外关于机床夹具的文献，在分析零件图的同时对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸、从而确定零件的加工工艺过程、计算各工序的切削用量及工时。
结合任务书决定设计钻削M8螺纹孔专用钻床夹具。本次夹具设计的主要内容有：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；夹具体的设计与确定；钻削力的计算；夹具定位误差的分析等。最后，通过CAD绘图零件完成零件图、毛坯图、夹具装配图、夹具体图及非标零件图的绘制。
本次设计的夹具其结构简单、操作便捷、生产率高，为实际的生产提供一定的理论依据。
关键词：外壳、前刹车调整臂、钻削、M8
Abstract
Jig is an essential device in parts processing. The fixture has the advantages of high utilization rate, good economy, and less use and quantity of functional components. With more and more kinds of parts, shapes and sizes, it is necessary to design a special fixture.
The main content of this design is the shell- front brake adjusting arm machining technology and drilling M8 threaded hole clamp design. At the beginning of the design,we consulted the relevant data and the domestic and foreign literatures about machine tool and fixture, analyzed the structure and process of the partwhile analyzing the part drawing, made clear the choice of rough datum and precision datum, determined the machining allowance of the part and the size of the blank, thus determined the processing process of the part and calculated the cutting function of eachworking procedure. Quantity andworking hours.
Combinedwith task book,we decided to design special drilling jig for drilling M8 thread hole. The main contents of this fixture design are positioning scheme, positioning element selection and determination; clamping scheme, clamping element selection and determination; fixture body design and determination; drilling force calculation; fixture positioning error analysis. Finally, the parts drawing, blank drawing, fixture assembly drawing, fixture body drawing and non-standard parts drawing are completed by CAD drawing.
The fixture has simple structure, convenient operation and high productivity,which provides a theoretical basis for actual production.
Keywords shell, front brake adjusting arm, drilling, M8
目录
摘要I
Abstract II
第一章绪论1
1.1机床夹具的发展史1
1.2机床夹具在机械加工中的作用1
1.3机床夹具的分类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
第四章钻削M8螺纹孔专用夹具设计25
4.1定位方案的确定及定位元件的选择25
4.1.1定位方案的确定25
4.1.2定位元件的选择25
4.2夹紧方案的确定及夹紧元件的选择26
4.2.1夹紧方案的确定26
4.2.2夹紧元件的选择26
4.3夹具体的设计27
4.4导向装置的确定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28
结论29
致谢30
参考文献31