针对iPad2组装的天线盖热固化工艺参数优化研究

发布时间：2018-01-17 21:18

  本文关键词：针对iPad2组装的天线盖热固化工艺参数优化研究　出处：《清华大学》2013年硕士论文　论文类型：学位论文

  更多相关文章： 天线盖热固化机 参数优化 中心复合序贯设计

【摘要】：2010年F公司在成都建厂后，在MacIII组装车间布了20条组装生产线做iPad2产品。在iPad2组装制程中，天线盖固化工站是机台最多、占用空间最大的工站。由于在量产初期生产良率不高以及生产任务紧张，此工站需要机台较多，相应的生产作业员及QC人员都比较多，现场比较混乱。为了完成任务通常需要加班生产。iPad2在成都导入后公司要求提高生产效率，降低成本。所以，很有必要对天线盖热固化机进行优化。在满足品质的条件下降低单机台的固化时间，提高机台生产效率，机台效率提高后在产能不变的情况下所需要的机台数量及操作人员的数量都减少，从而达到降低成本。 本文首先是对中心复合序贯方法一些基本理论做了介绍，通过某汽车厂轴承使用寿命优化这个实际案例介绍了中心复合序贯设计方法的实际运用。 其次是对iPad2组装制程中天线盖固化工站的热固化原理及热固化机等做了相关介绍。天线盖热固化机在初始设计时只设计了上模发热板，，下模并没有设计发热板加热。为了增加天线盖热固化机的固化效果工程师增加了下模发热板并重新设置机台参数后进行生产。 接着是对天线盖热固化机进行参数优化。首先是全因子设计实验，找出关键因子为上模温度、下模温度和固化时间，通过实验数据判断指标远没达到目标值；其次是降低固化时间继续做实验寻找最优实验区域，最优实验区域的参数为上模温度190℃、下模温度70℃和固化时间120秒；再次是根据序贯实验，增加6个星号点和3个中心点继续实验；接着是利用响应优化器求出在满足约束条件推力不低于250N情况下最少固化时间即成本最小时的最佳的因数组合。优化后最佳参数为上模温度190℃、下模温度70℃和固化时间111秒，机台数量由优化前16台降低到优化后12台，成本由优化前5952000元降低为优化后4464000元，降低成本1488000元。 最后通过连续两周小批量验证没有其他异常就正常导入生产。
[Abstract]:In 2010, F Company set up a factory in Chengdu, and distributed 20 assembly lines to make iPad2 products in MacIII assembly workshop. In the iPad2 assembly process, the antenna cover chemical station is the most. Occupation of the largest space of the station. Due to the initial production yield is not high and production tasks are tight, this station needs more machines, the corresponding production operators and QC personnel are more. In order to complete the task, we usually need to work overtime. IPad2 is imported in Chengdu to improve the production efficiency and reduce the cost. It is necessary to optimize the thermosetting machine under the condition of satisfying the quality to reduce the curing time of the single machine and improve the production efficiency of the machine. With the increase of efficiency, the number of machines and operators will be reduced under the condition of constant production capacity, so as to reduce the cost. This paper first introduces some basic theories of the central composite sequential method, and introduces the practical application of the central composite sequential design method through the practical case of bearing service life optimization in a certain automobile factory. Secondly, the principle of thermal solidification and the thermosetting machine of the chemical station of antenna cover in iPad2 assembly process are introduced. Only the upper mold heating plate is designed in the initial design of the antenna cover thermal solidification machine. In order to increase the curing effect of the thermosetting machine the engineer added the heating plate of the lower mold and set the parameters of the machine to produce it. Then the parameters of the thermal curing machine are optimized. First, the design experiment of the whole factor is done. The key factors are the temperature of the upper mold, the temperature of the lower mold and the curing time, and the index is far from reaching the target value according to the experimental data. The second is to reduce the curing time and continue to do experiments to find the best experimental region, the optimal experimental region parameters are the upper mold temperature 190 鈩

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