文档介绍：农机专业英语
第一单元
assembly drawing装配图
balloon零件序号
detail drawing 零件图
view 视图
convention 规范 般含有2-3个视图(主视图，俯视图和侧视图)，每个视图均为所绘零件的正投影。
of sectional views are cutting-plane symbols,which show where imaginary cutting planes are passed to produce the sections.
剖视图的特征是带有剖面线，剖面线符号表示利用想象的剖切面产生剖视图的位置。
the sdvent of well-developed interchangeable manufactire,these distances have been accompanied by tolerances of the plus-or-minus or min-and-max-limit types.
由于互换性制造技术的出现和不断完善，零件图的尺寸都用带有正负公差或最大、最小极限的尺寸标注。
process flow schematic is a diagram commonly used in engineering to indicate the general flow of plant processes and equipment.
工艺流程图常用来说明企业的生产工艺和设备流程。
most cases the layout drawing ultimately becomes the primary source of information from which detail drawings and assembly drawings are prepared by other drafters under the guidance of the designer.
在大多数情况下，设计人员绘制的总体布局图最终成为其他人员绘制零件图和装配图的第一手资料。
第五单元
shaft rotates on rolling contact or bush types of retaining rings ,thrust bearings,grooves and steps in the shaft are used to take up axial loads and locate the rotating elements.
传动轴一般用滚动或滑动轴承支承，用推力轴承、键槽、轴肩和定位环等为旋转零部件定位并且承受轴向载荷。
solid shaft is obtainable commercially in round bar stock up to 15cm in is produced by hot-drwing and cold-drawing or by machining-finishing with diametes in increments of 6mm or less.
实心轴可利用直接购买的直径最大可达到15cm的棒料通过热拔，冷拔或机加工制成，轴的直径可由6mm或更小开始递增。
speed spindles are designed with the spindle motor flanged to the spindle shaft,while conventional or normal spindles are mostly gear or belt driven.
高速主轴一般通过法兰与主轴电动机连接，而普通主轴常常通过齿轮或传动带驱动。
cold rolled shafts are stronger than hot rolled shafts but with higher residual residual stesses may cause distortion of the shaft when it is
machined,especially when slots or key ways are cut.
冷轧加工的传动轴强度比热轧加工的高，但是会存在较大的残余应力。在对传动轴进行机加工特别是车槽或加工键槽时，残余应力的存在会导致轴发生挠曲变形。
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