机械5

摘要 本课题设计的是气缸体双工位专用钻床，用于钻削被加工零件左侧面上的12个30深110mm的挺柱孔，右侧扩12个41的孔、锪挺柱孔41端面，并钻削12个8和7个6的水孔。本机床设计主要包括总体设计和夹具设计两个部分。采用卧式双工位双面加工方案，左侧主轴箱用来加工这12个挺柱孔，右侧主轴箱用来完成剩下的31个孔的加工，两主轴箱的中间是夹具部分。机床采用液压滑台实现刀具的进给，以保证进给速度的稳定可靠。由于工件左侧12个30 mm的挺柱孔之间孔距较小，使得左主轴箱中主轴的排布受到了限制，为此采用双工位分两批加工。工件选用“一面两孔”的定位方案，采用液压夹紧方式。为保证工件上被加工孔的位置精度，采用了导向装置。因工件批量较大，导向装置中的钻套容易磨损，所以采用了可换钻套。夹具体材料采用HT200,并在夹具体上开设排屑槽以防止切屑在定位元件工作表面上或其他装置中堆积而影响工件的正确定位和夹具的正常工作。 关键词：气缸体；组合机床；总体设计；夹具 Desig
n of Ge
neral a
nd Fixture of Modular Machi
ne Tool with Double Statio
ns Drilli
ng for the Cyli
nder Body Abstract The modular machi
ne tool is desig
ned for double statio
ns drilli
ng of the cyli
nder body. It is used for machi
ni
ng these holes i
n the work piece: twelve holes with the diameter 30mm a
nd depth 110mm o
n the left side, twelve diameter 41mm holes a
nd their bottom surfaces o
n the right surface, twelve diameter 8mm a
nd seve
n diameter 6mm holes. The topic i
ncludes two parts, the ge
neral desig
n a
nd fixture desig
n of the machi
ne tool. The modular machi
ne tool uses the horizo
ntal-type, double-statio
n a
nd two-side processi
ng pla
n. The left spi
ndle box is used for machi
ni
ng twelve tappet holes, the right spi
ndle box is used for machi
ni
ng 31 holes, a
nd a fixture is betwee
n two spi
ndle boxes. To achieve stable a
nd reliable feed, hydraulic pressure slidi
ng tables are used i
n this machi
ni
ng tool. The small dista
nce betwee
n two tappet holes o
n the left side of the cyli
nder body makes arra
ngeme
nt of mai
n spi
ndle i
n the headstock restricted. Therefore twelve holes o
n the left side are separated i
nto two groups through double-statio
n machi
ni
ng. The work piece is located at the fixture through "a face two holes", a
nd clamped by hydraulic pressure devices. To e
nsure positio
n precisio
n, the guidi
ng devices are used. Replaceable guidi
ng sleeves are chose
n, because they are easy weari
ng i
n large qua
ntities of productio
n. The material of clamp body is HT200. Chip troughs which are i
n the clamp body are free of chip falli
ng o
nto the worki
ng surface of positio
ni
ng compo
ne
nts or accumulati
ng o
n other devices, a
nd e
nsure the work piece correct positio
ni
ng a
nd the fixture
normal worki
ng. Key words: cyli
nder body; modular machi
ne tool; ge
neral desig
n; fixture 目录 摘要I Abstract II 第一章总体设计6 1.1总体方案论证6 1.1.1加工内容及要求6 1.1.2机床配置型式的选择6 1.1.3定位基准的选择6 1.2确定切削用量及选择刀具7 1.2.1选择切削用量7 1.2.3选择刀具结构9 1.3总体设计—“三图一卡” 9 1.3.1被加工零件工序图9 1.3.3机床联系尺寸图12 1.3.4机床生产率计算卡15 第二章夹具设计22 2.1概述22 2.1.1零件的工艺性分析22 2.1.2夹具设计的基本要求22 2.2定位方案的确定23 2.2.1概述23 2.2.2定位基准的选择23 2.3加紧方案的确定24 2.3.1夹紧装置的确定24 2.3.2夹紧力的确定25 2.4导向装置的选择29 2.4.1钻模套型式的选择和设计29 2.4.2钻模板的类型和设计31 2.5夹具体的设计31 2.6误差分析32 3.1总结35 参考文献36 致谢37