画法几何及机械制图作业答案.doc

画法几何及机械制图作业参考答案第一章 制图基本知识(略)第二章 点、直线、平面的投影1.已知各点的两面投影，求作其第三投影。2.已知直线AB的两面投影,完成其第三面投影。3.作一直线MN，使MN/AB,且与直线CD、EF相交。4.过已知点作直线。（1）过A点作一直线与直线EF平行；（2）过A点作一直线与直线EF相交，交点B距V面为10。5.已知CD为正平线，不全平面图的投影。6.在ABC平面上作一距V面15的正平线， 并过顶点A作一水平线。第三章 基本几何体1.完成下列各形体的投影。 2.分析立体的截交线，并求作立体的投影。3.分析立体的截交线，并求作立体的投影。4.分析立体的截交线，并求作立体的投影。5.分析立体的截交线，并求作立体的投影。第五章 组合体的视图1.根据给出的俯视图，构思物体形状，并画出另两视图。2.根据给出的俯视图，构思物体形状，并画出另两视图。3.根据给出的俯视图，构思物体形状，并画出另两视图。4. 根据给出的俯视图，构思物体形状，并画出另两视图。5. 想像题中物体的形状，并画出第三视图。第六章 机件常用的表达法1.在指定位置，作A-A、B-B（局部）剖视图。2.将主视图、俯视图改画为局部剖视图。3.补出题中剖视后主视图中的缺线。（本题中为全剖视图）4.补出题中剖视后主视图中的缺线。（本题中为半剖视图）第七章 标准件与常用件1.在A3图纸上画出螺栓连接的图形。2.在A3图纸上画出螺钉连接的图形。3.已知：齿数z=40,模数m=5标准直尺圆柱齿轮，求出da,d,df,完成两视图，标注尺寸。4.已知：两直尺圆柱齿轮相啮合齿数z=22,模数m=3，中心距a=60mm,计算两齿轮的分度圆、齿根圆和齿顶圆直径，并完成啮合图。第八章 零件图1.读零件图并回答问题。（1）此零件名称是 斧盖 ，主视图采用 全 剖视。（2）用指引线标出此零件长、宽、高三个方向的尺寸基准，并指明是哪个方向的尺寸基准。（3）用铅笔圈出此零件图上的定位尺寸。（4）釜盖上有 6 个M12的螺孔，深是 10mm ，是圆形均匀 分布的。（5）釜盖上有 6 个 形状的槽（可用图形说明），槽宽是 23 ，槽上方有直径是 23 的沉孔。（6）此零件表面质量要求最高的粗糙度代号是 。（7）标题栏中Q235-A表示零件材料为碳素结构钢Q235，A为质量等级。2. 读齿轮轴零件图，在指定位置补画断面图，并完成填空题。（1）说明20f7的含义：20为 基本尺寸 ，f7是 公差带代号 。（2）说明含义：符号表示 垂直度 ，数字0.03是 公差 ，A 是 基准符号 。（3）指出图中的工艺结构：它有 2 处倒角，其尺寸分别为 c2和 c1.5 ，有 1 处退刀槽，其尺寸为 22 。第九章 装配图（略）技术官员村位于位于亚运城东部，主干道二以东石楼涌以西的地块，占地面积、m2，总建筑面积、m2，共包括地下室南区、地下室北区、地上部分1栋12栋、服务中心、室外工程等多个单体工程。其中住宅面积m2，共12栋，17栋建筑层数为11层，812栋11层（局部复式顶层），首层局部架空，布置公建配套设施。integrated energy, chemicals and textile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the citys liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industry, changning district, shale gas production capacity reached 277 million cubic metres, built the countrys first independent high-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-3 GDP growth figure 2.1-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-Eastern State. Low mountains and hills in the city landscape as the main ridge-and-Valley, pingba small fragmented nature picture for water and the second land of the seven hills. 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, and spatial structure of typical zonal group, 2012-cities in building with an area of about 76.2km2. From city-building situation, old town-the South Bank Center construction is lagging behind, disintegration of the old city is slow, optimization and upgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accounting for city development, suspicious pattern could not be formed. As regards transport, with the outward expansion of cities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the citys liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industry, changning district, shale gas production capacity reached 277 million cubic metres, built the countrys first independent high-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-3 GDP growth figure 2.1-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-Eastern State. Low mountains and hills in the city landscape as the main ridge-and-Valley, pingba small fragmented nature picture for water and the second land of the seven hills. 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, and spatial structure of typical zonal group, 2012-cities in building with an area of about 76.2km2. From city-building situation, old town-the South Bank Center construction is lagging behind, disintegration of the old city is slow, optimization and upgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accounting for city development, suspicious pattern could not be formed. As regards transport, with the outward expansion of cities, cities have been expanding, centripetal city traffic organization has not changed,