GEIC693PWR331B
單元式制造(Cellular Manufacturing),是指在一條生產(chǎn)線或一個(gè)機(jī)器設(shè)備單元內(nèi),由本生產(chǎn)線或生產(chǎn)單元的操作工生產(chǎn)多種產(chǎn)品或零部件的生產(chǎn)制造過程。單元式布局(Cellular layout)是單元式制造的主要布局組成形式。
特點(diǎn)編輯
1、無后續(xù)組裝和加工工序 在精益單元中不會產(chǎn)生下級組裝件。如果產(chǎn)品結(jié)構(gòu)定義要求下一級組裝,可以將下級組裝在單元中合并入此單元終產(chǎn)品組裝工序。
2、單件制造
單元式制造要求單元內(nèi)實(shí)現(xiàn)單件制造,即在單元中無產(chǎn)品隊(duì)列,各生產(chǎn)設(shè)備或人工操作按 照訂單需求調(diào)整生產(chǎn)速度并進(jìn)行協(xié)調(diào),生產(chǎn)瓶頸。
3、靈活布局和操作區(qū)域接近
單元式制造規(guī)劃的一個(gè)主要目的是能根據(jù)產(chǎn)品需求靈活調(diào)整生產(chǎn)輸出。要做到這一點(diǎn),合理分配單元人力。U形和J形的單元布局可以使操作人員工作時(shí)背對背或肩并肩,有助于增強(qiáng)單元內(nèi)各項(xiàng)操作時(shí)的人員活動性,因此是常用的單元布局。傳統(tǒng)的線形布局用于 長生產(chǎn)線,工人不能轉(zhuǎn)身立即從事其它操作,因此靈活性較低。
4、多任務(wù)操作
在合理的單元布局中,工人可以作多種專項(xiàng)產(chǎn)品加工,或者處理物料等。這種變化可以有 效避免工人長時(shí)間在固定位置反復(fù)從事單項(xiàng)操作的疲勞,同時(shí)可以節(jié)省人力成本。
根據(jù)精益原則,傳統(tǒng)的工廠按制造功能分類布局由單元式制造布局代替。在沒有足夠制造功能作單元式布局或難以單元規(guī)劃時(shí),可用拉動式制造方式代替單元式布局。關(guān)鍵測量參數(shù):在制品(Work-in-Process: WIP)庫存水平。這個(gè)參數(shù)應(yīng)隨精益化過程逐漸下降。
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