本文關鍵詞：針對iPad2組裝的天線蓋熱固化工藝參數(shù)優(yōu)化研究　出處：《清華大學》2013年碩士論文　論文類型：學位論文

  更多相關文章： 天線蓋熱固化機 參數(shù)優(yōu)化 中心復合序貫設計

【摘要】：2010年F公司在成都建廠后，在MacIII組裝車間布了20條組裝生產(chǎn)線做iPad2產(chǎn)品。在iPad2組裝制程中，天線蓋固化工站是機臺最多、占用空間最大的工站。由于在量產(chǎn)初期生產(chǎn)良率不高以及生產(chǎn)任務緊張，此工站需要機臺較多，相應的生產(chǎn)作業(yè)員及QC人員都比較多，現(xiàn)場比較混亂。為了完成任務通常需要加班生產(chǎn)。iPad2在成都導入后公司要求提高生產(chǎn)效率，降低成本。所以，很有必要對天線蓋熱固化機進行優(yōu)化。在滿足品質(zhì)的條件下降低單機臺的固化時間，提高機臺生產(chǎn)效率，機臺效率提高后在產(chǎn)能不變的情況下所需要的機臺數(shù)量及操作人員的數(shù)量都減少，從而達到降低成本。 本文首先是對中心復合序貫方法一些基本理論做了介紹，通過某汽車廠軸承使用壽命優(yōu)化這個實際案例介紹了中心復合序貫設計方法的實際運用。 其次是對iPad2組裝制程中天線蓋固化工站的熱固化原理及熱固化機等做了相關介紹。天線蓋熱固化機在初始設計時只設計了上模發(fā)熱板，，下模并沒有設計發(fā)熱板加熱。為了增加天線蓋熱固化機的固化效果工程師增加了下模發(fā)熱板并重新設置機臺參數(shù)后進行生產(chǎn)。 接著是對天線蓋熱固化機進行參數(shù)優(yōu)化。首先是全因子設計實驗，找出關鍵因子為上模溫度、下模溫度和固化時間，通過實驗數(shù)據(jù)判斷指標遠沒達到目標值；其次是降低固化時間繼續(xù)做實驗尋找最優(yōu)實驗區(qū)域，最優(yōu)實驗區(qū)域的參數(shù)為上模溫度190℃、下模溫度70℃和固化時間120秒；再次是根據(jù)序貫實驗，增加6個星號點和3個中心點繼續(xù)實驗；接著是利用響應優(yōu)化器求出在滿足約束條件推力不低于250N情況下最少固化時間即成本最小時的最佳的因數(shù)組合。優(yōu)化后最佳參數(shù)為上模溫度190℃、下模溫度70℃和固化時間111秒，機臺數(shù)量由優(yōu)化前16臺降低到優(yōu)化后12臺，成本由優(yōu)化前5952000元降低為優(yōu)化后4464000元，降低成本1488000元。 最后通過連續(xù)兩周小批量驗證沒有其他異常就正常導入生產(chǎn)。
[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

本文編號：1438017