学 院
毕 业 论 文(设 计)
学生姓名 学号
指导教师
学 院 机电工程学院
专 业 机械设计制造及其自动化 年级 2016
论文答辩日期 2016 年 6 月 1 日
学 院
D495Q3A柴油机凸轮轴毛坯的设计
完成日期:
指导教师签字:
答辩小组成员签字:
发动机凸轮轴
摘 要
凸轮轴是活塞发动机里的一个部件。它的作用是控制气门的开启和闭合动作。虽然在四冲程发动机里凸轮轴的转速是曲轴的一半(在二冲程发动机中凸轮轴的转速与曲轴相同),不过通常它的转速依然很高,而且需要承受很大的扭矩,因此设计中对凸轮轴在强度和支撑方面的要求很高,其材质一般是特种铸铁,偶尔也有采用锻件的。
毛坯的形状和尺寸的确定,除了将毛坯余量附在零件相应的加工表面上之外,有时还要考虑到毛坯的制造、机械加工及热处理等工艺因素的影响。在这种情况下,毛坯的形状可能与工件的形状有所不同。
关键词:凸轮轴;毛坯;加工余量;材料;
Thesis Title
The camshaft is a component in the piston engine. Its role is to control the valve opening and closing actions. Although in four stroke engine camshaft crankshaft speed is half ( in two stroke engine camshaft and crankshaft speed of same ), but usually it's speed is still high, but to bear great torque, therefore the design of cam shaft on the strength and support requirements are very high, generally the material special cast iron, occasionally using forgings.
Blank shape and size determination, in addition to the blank margin is attached to the parts corresponding to the machined surface, sometines even taking into account the blank of manufacturing, machining and heat treatment process factors. In this case, the blank shape may vary with the shape of the workpiece.
Key word: camshaft; rough machining allowance; material;
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