气缸体双工位专用钻床总体及夹具设计摘要

气缸体双工位专用钻床总体及夹具设计
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
Design of General and Fixture of Modular Machine Tool
with Double Stations Drilling for the Cylinder Body
Abstract:The modular machine tool is designed for double stations drilling of the cylinder body. It is used for machining these holes in the work piece: twelve holes with the diameter 30mm and depth 110mm on the left side, twelve diameter 41mm holes and their bottom surfaces on the right surface, twelve diameter 8mm and seven diameter 6mm holes. The topic includes two parts, the general design and fixture design of the machine tool.The modular machine tool uses the horizontal-type, double-station and two-side processing plan. The left spindle box is used for
machining twelve tappet holes, the right spindle box is used for machining 31 holes, and a fixture is between two spindle boxes. To achieve stable and reliable feed, hydraulic pressure sliding tables are used in this machining tool. The small distance between two tappet holes on the left side of the cylinder body makes arrangement of main spindle in the headstock restricted. Therefore twelve holes on the left side are separated into two groups through double-station machining. The work piece is located at the fixture through "a face two holes", and clamped by hydraulic pressure devices. To ensure position precision, the guiding devices are used. Replaceable guiding sleeves are chosen, because they are easy wearing in large quantities of production. The material of clamp body is HT200. Chip troughs which are in the clamp body are free of chip falling onto the working surface of positioning components or accumulating on other devices, and ensure the work piece correct positioning and the fixture normal working.
Key words:cylinder body; modular machine tool; general design; fixture。