ZH1105柴油机齿轮室盖多孔钻组合机床总
体及夹具设计
ZH1105柴油机齿轮室盖多孔钻组合机床总体及夹具设计
摘 要：组合机床是由大量通用部件和少量的专用部件组成的专用机床。为了
提高柴油机齿轮室盖得生产效率，满足被加工零件的精度要求，本课题设计了一台用于加工ZH1105柴油机齿轮室盖多孔钻孔的组合机床。本组合机床可以同时加工ZH1105柴油机齿轮室盖左面上的6个M6的螺纹底孔、6个?20的平面；右面上的6个?10的光孔、1个M14的螺纹底孔、1个M8的螺纹底孔3个?10的光孔；后面上的3个?9的光孔、1个M12的螺纹底孔。本课题主要阐述组合机床的总体设计和夹具设计。在满足工艺要求的基础上，绘制了“三图一卡”，确定了该组合机床的整体布置方案。在夹具设计过程中，采用方便可靠的一面两销的定位，以工件的左面作为主定位面限制3个自由度，由一个圆柱定位销限制2个自由度，由一个削边定位销限制剩下的一个自由度，从而限制了被加工零件的6个自由度。该组合机床夹具选用安全方便的液压夹紧方式，设计了夹具的总体结构和主要零件，对夹具进行了误差分析，夹紧力的计算。
该组合机床不仅保证了钻孔精度，还提高了加工效率，降低了工人的劳动强度，较好地完成了设计任务。
关键词：组合机床；钻孔；夹具设计
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Design of General and Fixture of Modular Machine Tool
for Porous Drilling of Housing Cover for Gear of ZH1105
Abstract: Modular machine tool is a special–purpose machine tool consisted that is
with a large number of general-purpose components and a small number of special-purpose components. In order to improve the housing cover for gear efficiency and satisfy the precision of the processed parts, the subject aims at designing a modular machine tool used for drilling holes, which are on three side of housing cover for gear of ZH1105. The modular machine tool can process 6 basic holes of M16 screw, countersink six diaphragms which the diameter is twenty on the left side of housing cover for gear of ZH1105; six diaphragms which the diameter is ten, one basic holes of M14 screw, one basic holes of M8 screw and three diaphragm which the diameter is ten on the right side, and three diaphragms which the diameter is nine, one basic holes of M12 screw on the right side.The design mainly illustrates the general design of the modular machine tool and the fixture design. On the basis of meetting the technical requirements, the completion of the technological drawing of the part which need to be manufactured, the general drawing of modular machine tool，drawing of cutter display and the efficiency card of manufacture, and determines the general layout program of the modular machine tool. In the process of designing the fixture, use the convenient and reliable positioning of the two holes on the same side are used, and the bottom of the work piece is positioned as a major side which restricts the three degrees of freedom, a cylindrical pin restricts two degrees of the freedom, a cutting edge pin restricts the left degrees of the freedom so that it restricts six degrees of the freedom of the work piece. The fixture of the modular machine tool uses the safe and convenient hydraulic clamping, designs the general structure and major parts of fixture, carries on the error analysis and calculations of clamping force.
The modular machine tool can not only guarantee the accuracy of drilling the holes, but also enhance the processing efficiency and reduce the labor intensity.
Key word: Modular machine tool; Drill the holes; Design of fixture