推荐回答(1个)
柔性制造单元是在制造单元的基础上发展起来,又具有一定的柔性,是柔性制造系统朝小型化与经济化发展的产物。柔性制造单元的基本功能及应用:
1、基本功能
1)自动化加工功能。可以自动完成车削、钻镗、铣削及攻螺纹等加工。
2)物料传输、存储功能。柔性制造单元配备有运行物料存储容量所需的在制品库、物料传输装备和工件装卸交换装置,并有刀具库和换刀装置。
3)自动检验、监控等功能。FMC可以完成刀具检测、工件在线测量或磨损检测监控、机床保护监控等。
4)FMC还有清洗、检验及切屑处理等功能。
2、FMC的应用方式
1)作为独立加工设备使用,其优点有:提高了工件搬运和装夹的效率,减轻劳动强度;机床利用率和加工效率比加工中心高;可实现晚闯无人看管生产,提高机床利用率;可方便地进行多品种零件(单元所限定的零件组范围内)的同时混流生产。
2)作为其他柔性制造系统的基本组成模块。当前柔性制造系统和柔性自动线日趋采用模块化组合方式,以FMC作为其基础模块,优点是可以为柔性制造系统分段建设创造条件。因此,FMC在结构配置和控制等方面都趋于适应组成系统的需要。
3、FMC的应用范围
FMC可以根据需要自动更换刀具和夹具,因此适于多品种、小批量生产。工件的全部加工一般是在一台机床上完成,因此常用于箱体类复杂零件的加工。FMC在汽车制造业应用非常广泛,而且也广泛应用于液压/气动阀类、泵类、电动工具及冰箱压缩机缸体等工件的加工。
柔性制造技术在各工业发达国家已经得到广泛的生产应用。FMC的投资比FMS少而经济效益相接近,更适用于财力有限的中、小型企业。目前,国外众多厂家将FMC列为发展的重点。
4、引入或购置FMC前的技术准备
企业引入或购置FMC前需做以下准备工作:根据生产任务选择适合在FMC上加工的零件,编制FMC待加工零件的情况表,主要内容包括零件外形尺寸,最大、最小加工尺寸和加工要求,所用刀具类型、品种和数量,工装、工时和年产量等。分析比较各种商品化FMC的结构、性能及其价格,选出适当的FMC型号。根据零件情况表作刀具统计,确定刀库容量。一般完成一件中等复杂程度零件的全部加工需30把以内的刀具,考虑留有余地,实现混流生产,宜选60把左右刀具的刀库容量。若考虑更复杂零件的混流生产,则应选100把左右刀具的容量。根据零件情况统计表确定托板库工作台的数量。为保证实现第二、三班无人照看生产,托板库工作台应保证可安装的零件足够使用。对两班制,一般选6个工作台。选购必要附件,如对刀仪、冷却装置及监控装置等。
柔性制造单元的实施效益:
1、可以实现24h连续运转。
2、增加了设备的柔性。FMC比单台加工中心更容易实现多品种配套加工。
3、生产利润高。
4、有利于实现计算机集成生产系统。
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