普通车床的主轴箱部件设计..doc

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普通车床的主轴箱部件设计.

课程设计说明书 课程名称: 机械制造装备设计 设计题目: 普通车床的主轴箱部件设计 专 业: 机械设计及其自动化 学生姓名: 指导教师: 目录 一、运动设计············································1 1:确定变速范围R·················································1 2:确定转速级数····················································1 3:确定结构式······················································1 4:绘制转速图······················································1 5:确定各变速组传动副齿数··········································2 6:绘制传动系统图··················································3 二、动力计算··············································3 1:确定各轴转速····················································3 2:带传动设计······················································4 3:各传动组齿轮模数的确定和校核····································5 4:校核a传动组齿轮················································7 5:校核b传动组齿轮·················································7 6:主轴挠度的校核··················································8 7:轴的校核·························································9 8:主轴最佳跨距的确定··············································9 9:各传动轴支承处轴承的选择········································10 10:计算跨距·······················································10 三、心得体会·············································11 四、参考文献·············································11 一、设计目的 通过机床主运动机械变速传动系统得结构设计,在拟定传动和变速的结构方案过程中,得到设计构思、方案分析、结构工艺性、机械制图、零件计算、编写技术文件和查阅技术资料等方面的综合训练,树立正确的设计思想,掌握基本的设计方法,并具有初步的结构分析、结构设计和计算能力。 二、设计步骤 1.运动设计 1.1已知条件 [1]确定转速范围:主轴最小转速最大转速 [2]确定公比: [4] 最大加工直径250mm [5]主电动机功率P=4kw 根据已知条件可得变速范围Rn=nmax/nmin=22.3r/min 故Z=lgRn/lg+1=9 故转速级数: 1.2结构分析式 在降速传动中,防止齿轮直径过大而使径向尺寸常限制最小传动比 ;在升速时为防止产生过大的噪音和震动常限制最大转速比。在主传动链任一传动组的最大变速范围。在设计时必须保证中间传动轴的变速范围最小, 检查传动组的变速范围时,只检查最后一个扩大组: 其中, 所以 ,合适 1.3 绘制转速图 ⑴选择电动机 一般车床若无特殊要求,多采用Y系列封闭式三相异步电动机,根据原则条件选择Y132M1-6型Y系列笼式三相异步电动机。 ⑵分配总降速传动比 [3]确定传动轴轴数 传动轴轴数 = 变速组数 + 定比传动副数 + 1 = 2 + 1 + 1 = 4 ⑷确定各级转速并绘制转速图 由   z

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