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1、摘 要 本毕业设计是 CA6140 车床上的螺母（也更准确的说法也可以称之为开合螺母）的设计，包括以下几个方面：设计的组件，计算过程和工作时间，两套夹具设计（车床，钻床，每一组） ，所要求的特殊夹具，和相应的制卡和简单的运动仿真。专用夹具方案的确定，机械设计行业加工中，是一步非常非常重要一个步骤。专用夹具的方案适合与否，几乎都直接决定了该零件能否进行批量高效的加工。我们在最终肯定其设计方案时应遵循以下几点规定与法则：那么最开始第一点必须要保证加工质量，设计的结构尽可能要简单（只要满足加工要求，夹具本身越单一越好） ，操作起来要简单可行，比如钻床同一个零件二次装夹，就必须考虑到这一点，不然会大大
2、降低加工效率）制造成本的经济效益较高，例如本零件的毛坯铸造可用青铜，也可用 45#或者灰铸铁，此时就要确定好是否符合经济效益原则。特别是我们的导师柏老师，明明是中午午休时间，却放弃了自己私人的午休，为我们做毕设的同学们牺牲了宝贵的时间，只为了我们能够在这四年的总结中给母校交出满意的答卷。对于我而言，我希望在“此次的模拟的非实际加工产品”的设计可以锻炼自己的综合分析问题的方法，如何准确和解决问题的能力，而且对同学们的未来就业与实操，打下了异常良好的基础性工作。总的来说，这次毕设所带给我们的是平时无法学到的，收获很多！关键词：CA6140 开合螺母;夹具设计;工艺工装设计. 2AbstractTh
3、is graduation design is on CA6140 lathe nut (also more accurately can also be called a half nuts) design, including the following aspects: the design of components, calculation process and working time, two sets of fixture design, lathe, drilling machine, each group), the required special fixture, a
4、nd the corresponding fabrication and simple movement simulation.The scheme of special fixture design industry processing machinery, is very, very important one step.Special fixture scheme suitable for or not, almost all can directly determines the parts for efficient batch processing.When we sure th
5、e final design plan should follow the following rules and laws: then started the first must ensure the quality of processing, the structure of the design as much as possible, to simple, as long as meet the requirements of processing, fixture itself as a single as possible), to be simple and feasible
6、 to operate, such as the second clamping drilling machine with the same parts, must be with this in mind, or it will significantly reduce processing efficiency) the economic benefits of the manufacturing cost is higher, such as the blank casting bronze are available, and this part also can use 45 #
7、or gray cast iron, this will determine whether conform to the principle of economic benefit.Especially our mentor teacher parker, it is at noon lunch break, but to give up their own private lunch, do you classmates for us at the expense of his precious time, in order to we can only in the four years
8、 of summary to his Alma mater to hand over a satisfactory answer.For me, I hope that in the the simulation of the actual processing products design can exercise their own comprehensive method to analyze the problem, how to accurately and problem solving skills, and the students for the future employ
9、ment and real operation, laid a good groundwork.In general, the project brings to us are usually unable to learn, a lot!Key world: open nut to CA6140;tong design;process design.目 录 3引言 .11 零件的分析-CA6140 车床开合螺母加工工艺 .11.1 CA6140 该零件的作用 .11.2 零件的工艺分析 .11.3 工艺规程的设计 .21.3.1 确定零件毛坯的材料 .21.3.2 CA6140 基准面的选择 .31.3.3 制定准确合理的工艺路线 .31.3.4 零件的加工方法的选择: .31.4.1 零件加工阶段的划分 .31.4.2 基面先行原则 .41.4.3 先粗后精 .41.4.4 先面后孔 .41.5 工序划分的确定 .41.6 确定切削用量及基本工时 .121.6.1 粗铣底平面 .121.6.2 精铣底平面 .131.6.3 粗铣燕尾 .
