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MVME705B庫(kù)存PLC自動(dòng)化備品模塊

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MVME705B庫(kù)存PLC自動(dòng)化備品模塊

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MVME705B庫(kù)存PLC自動(dòng)化備品模塊
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MVME705B庫(kù)存PLC自動(dòng)化備品模塊 MVME705B庫(kù)存PLC自動(dòng)化備品模塊 MVME705B庫(kù)存PLC自動(dòng)化備品模塊
MVME705B庫(kù)存PLC自動(dòng)化備品模塊
MVME705B庫(kù)存PLC自動(dòng)化備品模塊
MVME705B庫(kù)存PLC自動(dòng)化備品模塊
在設(shè)計(jì)中,每個(gè)機(jī)組既要考慮到安全控制,其中包括本位機(jī)組的急停,安全按鈕;還要考慮方便操作,包括每個(gè)機(jī)組均應(yīng)有正點(diǎn),反點(diǎn)按鈕。因此,一方面輸入點(diǎn)增加很多;另一方面,走線也很不方便。采用雙機(jī)通訊,可以很好地解決此問(wèn)題,各機(jī)組的走線可以按照就近原則,進(jìn)入離它較近的控制柜內(nèi),既節(jié)省了走線,也方便了控制。 由于印刷機(jī)是一個(gè)精度較高的機(jī)械,印刷品的好壞一方面在于機(jī)械加工以及安裝的精度,另一方面,也取決于水路,墨路的平衡以及合壓的準(zhǔn)確性。雙色機(jī)的每一色組,都有水路和墨路裝置。為了便于水輥速度的調(diào)節(jié),每根水輥都用一個(gè)變頻器控制,同時(shí),主電機(jī)速度也需要變頻器調(diào)節(jié)。因此,為了實(shí)現(xiàn)多路速度調(diào)節(jié),我們采用了三菱4D/A數(shù)模轉(zhuǎn)換器,它將PLC方給出的數(shù)字量,根據(jù)相應(yīng)的算法,轉(zhuǎn)換成0~10V直流電壓輸出,很好地實(shí)現(xiàn)了多路速度調(diào)節(jié)要求。 在印刷過(guò)程中,調(diào)版是一個(gè)比較繁瑣的過(guò)程。尤其對(duì)多色機(jī)來(lái)說(shuō),各組版對(duì)正的精度會(huì)對(duì)印品產(chǎn)生很大的影響。如果套印不準(zhǔn),印刷品就會(huì)出現(xiàn)字面重疊或影像不清。一般來(lái)說(shuō),印版軸向調(diào)節(jié)范圍為-2mm~+2mm ,周向調(diào)節(jié)范圍為-1mm~+1mm。如果使用手動(dòng)調(diào)版,會(huì)浪費(fèi)很多時(shí)間,而且精度不高。為了實(shí)現(xiàn)自動(dòng)打版,我們?cè)诎孑伾习惭b了電位器,通過(guò)電位器將模擬量傳送給4A/D,經(jīng)過(guò)PLC處理,可將版輥的轉(zhuǎn)動(dòng)精度很好地控制在打版范圍內(nèi)。 觸摸屏作為一種新型的
人機(jī)界面
,從一出現(xiàn)就受到關(guān)注,它的簡(jiǎn)單易用,強(qiáng)大的功能及優(yōu)異的穩(wěn)定性使它非常適合用于工業(yè)環(huán)境。用戶可以自由地組合文字,按鈕,圖形,數(shù)字等來(lái)處理或監(jiān)控管理隨時(shí)可能變化的信息。隨著機(jī)械設(shè)備的飛速發(fā)展,以往的操作界面需由熟練的操作員才能操作,無(wú)法提高效率。但使用人機(jī)界面,能明確指示并告知操作員機(jī)器設(shè)備目前的狀況,使操作變得簡(jiǎn)單生動(dòng)。使用觸摸屏,還可以使機(jī)器配線標(biāo)準(zhǔn)化,簡(jiǎn)單化,同時(shí)也能減少PLC控制所需的I/O點(diǎn)數(shù),降低生產(chǎn)成本,也相對(duì)提高整套設(shè)備的附加價(jià)值。三菱觸摸屏和三菱PLC有很好的通用性,能在線監(jiān)視并修改程序,不必很麻煩的重復(fù)插拔接口。 3 軟件設(shè)計(jì) 3.1 給紙?jiān)O(shè)計(jì) 印刷機(jī)整體的電氣設(shè)計(jì)還是比較復(fù)雜的,對(duì)時(shí)間的要求也很嚴(yán)格。在機(jī)器的很多地方裝有接近開(kāi)關(guān),用來(lái)檢測(cè)不同的時(shí)間點(diǎn)。在印刷過(guò)程中,走紙的好壞是影響機(jī)器質(zhì)量的一個(gè)重要環(huán)節(jié)。所謂紙走的好壞,指的是無(wú)歪張,雙張等現(xiàn)象,如果有歪張,雙張現(xiàn)象,在高速情況下,就會(huì)將走壞的紙,卷入機(jī)器內(nèi),從而破壞膠皮,給用戶帶來(lái)很大損失。此過(guò)程流程如下: 在實(shí)驗(yàn)中,我們發(fā)現(xiàn),按照上述流程編制的程序,在低速?zèng)]有問(wèn)題,但速度增高至7000r/h后,就會(huì)出現(xiàn)歪張鎖不住現(xiàn)象。究其原因,主要是因?yàn)楣忸^反應(yīng)時(shí)間和磁鐵動(dòng)作時(shí)間滯后造成。程序在執(zhí)行過(guò)程中,采用循環(huán)掃描方式,為了讓電磁鐵輸出提前,在設(shè)計(jì)中,我采用了中斷和三菱編程指令的輸入輸出刷新指令,使電磁鐵輸出立即執(zhí)行,提前了電磁鐵動(dòng)作時(shí)間,即使在12000r/h的速度下,也能很好的鎖住有故障的紙張,解決了給紙的一大難題。 3.2離合壓設(shè)計(jì) 離壓,合壓在印刷中具有很重要的作用。離合壓的準(zhǔn)確性,對(duì)印品質(zhì)量的好壞有著直接的影響。合壓過(guò)早,會(huì)弄臟壓印輥筒,給操作帶來(lái)很多不便;離壓過(guò)早,會(huì)使后一張紙印不上完整的圖案,造成紙張浪費(fèi)。 在設(shè)計(jì)中,離壓,合壓的程序流程如圖所示: 印刷時(shí),版輥筒與膠皮輥筒先合壓,膠皮輥筒與壓印輥筒后合壓。在我們的機(jī)器中,合壓全部采用了氣動(dòng)裝置,每個(gè)氣缸都有一個(gè)動(dòng)作時(shí)間。由于印刷速度是多段速,在3000~12000r/h之間,根據(jù)用戶需要可選擇不同的速度。但是,氣缸動(dòng)作時(shí)間是一定的,齒輪轉(zhuǎn)過(guò)角度是一定的,因此,機(jī)器速度不同時(shí),合壓時(shí)間也不同。為了解決此問(wèn)題,我們根據(jù)理論計(jì)算值,找出對(duì)于不同機(jī)器速度時(shí)machine, the expansion agent can gather the fine dust fibers together to form a soft film, which basically inhibits the dust flying, which is particularly beneficial to the high-speed machine. Conclusion the puffing agent developed in this work has been used by many users and identified by experts, and has been unanimously reflected well. At present, the production and users of the expansion agent are increasing. Although the flow production line has undergone several revolutions for more than a century, it has always been the main production mode of automobiles and parts. The basic technology of flow production line is integration technology - integrating process system, logistics system and information system into flow production line. (1) Process system: namely machine tool workpiece system. The process equipment of modern car production line has entered the era of flexibility

numerical control machine

And intelligent tools. The main requirements for machine tools are: high speed, high precision, high precision retention - high machine tool engineering capability index (cm / CMK value), high reliability, etc. High speed machining center for engine production line: fast moving speed 60 ~ 100 m / min, acceleration 0.6 ~ 1.5g; The maximum speed of spindle is 8000 ~ 15000 R / min; Positioning accuracy / repeated positioning accuracy - below 1m of workbench, 8 μ m/4 μ M (VDI standard), working table more than 1m, 10 μ m/5 μ M / M (VDI standard). At present, the latest development of this kind of machining center in the world is that the motorized spindle is widely used in the main motion, and the linear feed motion is more and more usedelectric machinery

。 At the same time, three coordinate modularization and box in box structure are widely used. The machine tool is very simple, the proportion of purchased parts (accessories) is increased, and the delivery time is greatly shortened. The latest generation of uh "slimming" machining center of Mazak company in Japan adopts double X-axis feeding mode, and the width of the machine tool is shortened by 38 ~ 57%, greatly reducing the floor area and investment of the production line. 3-5 axis bed type and gantry type CNC / profiling high-speed milling machine (machining center) for die processing: the maximum speed of the main shaft is 20000-40000 R / min; Machine tool engineering capability index / process capability index CMK / CPK value ≥ 2.0/1.67. MTBF (mean time between failures), the data target of Yuanzhou, Japan in 2002 is 5000 hours. (2) Logistics system: it is composed of raw material processing, storage, loading and unloading devices and workpiece transmission devices between machine tools. Under the condition that a single NC machine tool is equipped with workpiece warehouse or raw material warehouse and automatic loading and unloading device (including manipulator and robot), that is, under the condition of integration with material storage and transmission and its automatic control, a