机械设计制图习题集非机类答案杨浩主编

P5-1P5-2P5-3P5-4P5-5P5-6P6-1P6-2P6-4P6-5P6-6P7-1P7-2P7-3P7-4P7-5P7-6P8-1P8-2P8-3P8-4P8-5P8-6P9-1选择左视图选择左视图1243P9-234P9-312P9-4P9-5P9-6134P13-1P13-2P13-3P13-4P 13-5P13-6P14-1P14-2P14-3P14-4P14-6P15-1P15-2P15-3P15-4P15-5P15-6P16-1P16-2P16-3P16-4P16-5P16-6P17-1P17-2P17-3P17-4P17-5P17-6P18-1P18-2P18-3P18-4P18-4P19-1P19-2P19-3P19-4-aP19-4-bP19-5P19-6P20-1P20-2P20-3P20-3P20-4P21-1P21-2P22-1P22-2P22-3P22-4P22-5P22-6P22-71234p23-31234P23-4P24-1P24-2P24-3P24-4P24-5P24-6P25-1P25-2P25-3P25-4P25-4P26-1P26-2P26-3P26-4P27-1P27-2P28-1P28-3P28-4组合体木模-1组合体木模-1组合体木模-2组合体木模-2P32-1P32-2P32-3AAP32-4ABP33-1P33-2P33-3P33-4P34-1P34-2P35-1P35-2P35-3P36-1P36-2P36-3P36-4P38-1P38-2P38-3P38-4P38-5P38-6P39-1P39-2P40-1P40-2P43-1P43-2P43-5P4334(4)6螺栓 30110P50-1P66-19-18 两个两个M16的螺钉固定一牵引钩，螺钉材料为的螺钉固定一牵引钩，螺钉材料为Q235，装配时装配时控制预紧力，接合面摩擦系数控制预紧力，接合面摩擦系数f=0.3,求允许的牵引力。求允许的牵引力。解：解：M16螺钉 d1预紧力预紧力牵引力牵引力答:允许的牵引力为允许的牵引力为P689-20单个螺栓承受的载荷单个螺栓承受的载荷F预紧力预紧力答：选用M30的螺栓P699-22单个螺栓承受的载荷单个螺栓承受的载荷F预紧力预紧力不可靠，用M22的螺栓P69