【正文】 s economic construction of highgrade for nc machine mainly rely on imports, China has a plete industrial chain, but the development of upscale numericalcontrol CNC system and functions required from outside the main parts. China export。s first machine production, but still is the world39。s market value to 70%, including 61 per cent of homemade numerical control machine, industry to raise % 62% of fixed assets investment pleted a yearonyear growth of 36%. Media reports, 2009 China first became the first big machine producer. Not only such, China also in eight successive years is the first large consumer machine and the first importer.At the beginning, the global economy to rebound in China that signs, center for structural adjustment of the machine tool, investment enterprise showed signs of rapid growth in order. Expected 2010 year machine tool industry growth will reach about 10%, metalcutting lathes will achieve a doubledigit growth in high, Metalworking machine tools will import and export growth restorative.Second, China machine industry , one is cheap product performance overcapacityDue to our whole industry in western industrialized countries behind the level of enterprise39。t respectively in where?A machine industry in China, the world39。s machine industry is through the readjustment of industrial structure, product structure, improve the ability of independent innovation, development, change from the international advanced manufacturing technology, cultivate enterprise high levels of independent development and innovation ability. With precise, efficient and flexible, plete, green demand for direction, to reform, reorganization and transformation, annexing international brand enterprises and products, to improve the domestic market share, expanding machine machine tool product development space.China39。 Since 1960, relatively simple and economic position control CNC drilling machine, and linear control CNC milling machine, the rapid development of CNC machine in mechanical manufacturing departments obtain promotion gradually. China started in 1958, developed successfully trialproduced a CNC valve of the numerical control system with CNC machine, 1965 started mass production of CNC system with transistor three coordinates nc milling machine.In 1965, third generation of integrated circuit, control devices, small size, power consumption, and reliability, the price drops further, promote the nc machine tools and the development of production. At the end of the 1960s, successively appeared by puter directly control tool machine direct numerical control system (hereinafter referred to as DNC), also called the group control system, Using small puter control puter numerical control system (hereinafter referred to as CNC control unit), which entered into the characteristics of small puters in the first generation.In 1974, successfully developed using microprocessor and semiconductor CunZhuQi microputer control devices (hereinafter referred to as newsun focus), this is the fifth CNC system. Fifth, pared with the third generation of numerical control equipment, function doubled in volume is reduced to the original 1/20, lower prices for 3/4 and reliability have greatly improved.In the early 1980s, with the puter software and hardware technology development, the manmachine dialogue to automatic programming of CNC. The numerical control equipment installed in miniaturization, can directly on the machine, The automation of CNC machine, automatic monitoring and further enhance the tool breakage and automatic detection workpiece etc. Function.In China39。 input Processing performance than the general automatic machine, high precision machining factors, can be suitable for processing and small batch, high accuracy and frequent flow, shape and plex workpiece, and can obtain good economic results.Along with the development of numerical control technology, the machine adopts CNC system, increasing variety lathes, milling, boring, grinding, drilling, gear cutting machine tools and electric spark machine tools, etc. In addition, can automatically change in one of the many process card processing center, turning centers, etc.Development historyIn 1948, the United States pasonce pany accept entrust us air propeller blades, airplane outline model processing equipment. Due to the plex and varied shapes, template, high precision machining equipment to general, and put forward the idea of puter controlled machine tools. In 1949, the pany at the Massachusetts institute of technology (MIT) servo laboratory, CNC, and began to study in 1952 successfully trialproduced by large vertical copy the milling modification of three coordinates CNC milling machine, soon started production, in 1957 formally put into use. It is in the process of development of manufacturing technology, marks an important breakthrough in nc machining era. Nc machining is the foundation of modern manufacture technology, this invention for manufacturing industry, has epochmaking meaning and farreaching influence. The world39。最后，向我的父親、母親、姐姐致謝，感謝他們對我的理解與支持。在此，我要向諸位老師深深地鞠上一躬。他們細(xì)心指導(dǎo)我的學(xué)習(xí)與研究，不僅授我以文，而且教我做人，雖歷時(shí)三載，卻給以終生受益無窮之道。蔡老師在后來的研究進(jìn)程中為我指點(diǎn)迷津，幫助我開拓研究思路，精心點(diǎn)撥、熱忱鼓勵(lì)。許多問題都是書本上是這樣，而在實(shí)際運(yùn)用中卻很不一樣，在經(jīng)過多次分析修改后，才設(shè)計(jì)出達(dá)到要求的系統(tǒng)。在設(shè)計(jì)中，體會到理論必須和實(shí)際相結(jié)合?？刂葡到y(tǒng)的開發(fā)設(shè)計(jì)是一項(xiàng)復(fù)雜的系統(tǒng)工程，必須嚴(yán)格按照系統(tǒng)分析、系統(tǒng)設(shè)計(jì)、系統(tǒng)實(shí)施、系統(tǒng)運(yùn)行于調(diào)試的過程來進(jìn)行。系統(tǒng)的分析與設(shè)計(jì)過程也是對學(xué)習(xí)的總結(jié)過程，更是進(jìn)一步學(xué)習(xí)與探索的過程。經(jīng)過一段時(shí)間的努力，旋蓋機(jī)的機(jī)械結(jié)構(gòu)、控制系統(tǒng)已設(shè)計(jì)完畢，其功能基本達(dá)到要求。茂名學(xué)院本科畢業(yè)設(shè)計(jì)：某潤滑油小包裝生產(chǎn)線旋蓋機(jī)機(jī)械及控制系統(tǒng)設(shè)計(jì)結(jié)束語畢業(yè)設(shè)計(jì)是我們畢業(yè)前夕最后也是最重要的一份作業(yè)，是對我們?nèi)昵髮W(xué)的一個(gè)總結(jié)，包含了我們?nèi)曛兴鶎W(xué)知識的積累，更是提升我們能力的一種方式。： 系統(tǒng)控制過程、小結(jié)本章介紹了控制系統(tǒng)的選擇、控制系統(tǒng)的硬件構(gòu)成、控制系統(tǒng)設(shè)計(jì)以及控制過程分析。工人把套上瓶蓋的瓶子放上輸送帶，此時(shí)按啟動按鈕，旋蓋機(jī)開始工作?？紤]到PLC輸入輸出點(diǎn)的負(fù)載能力，還考慮適當(dāng)?shù)膫溆命c(diǎn)，故本機(jī)選用16點(diǎn)I/O接口的PLC，輸入點(diǎn)數(shù)8,輸出點(diǎn)數(shù)8。該編程器FX2N系列是PLC FX家族中最先進(jìn)的系列。、控制系統(tǒng)的硬件構(gòu)成：控制系統(tǒng)是機(jī)器的核心組成部分之一，對生產(chǎn)效率和可靠性影響很大。 、機(jī)型的選擇PLC按結(jié)構(gòu)分為整體型和模塊型兩類，按應(yīng)用環(huán)境分為現(xiàn)場安裝和控制室安裝兩類；按CPU字長分為1位、4位、8位、16位、32位、64位等。 余量后，作為輸入輸出點(diǎn)數(shù)估算數(shù)據(jù)。熟悉可編程序控制器、功能表圖及有關(guān)的編程語言有利于縮短編程時(shí)間，因此，工程設(shè)計(jì)選型和估算時(shí)，應(yīng)詳細(xì)分析工藝過程的特點(diǎn)、控制要求，明確控制