【正文】 械手的設(shè)計(jì)參數(shù)，結(jié)合工業(yè)生產(chǎn)的實(shí)際情況，本設(shè)計(jì)設(shè)計(jì)抓取的工件質(zhì)量為 5公斤 。 除了運(yùn)動(dòng)速度以外，手臂設(shè)計(jì)的基本參數(shù)還有伸縮行程和工作半徑。 . 機(jī)械手的 技術(shù)參數(shù)列表 一、用途 : 用于自動(dòng)輸送線(xiàn)的上下料。 (一 )具有足夠的握力 (即夾緊力 ) 在確定手指的握力時(shí)，除考慮工件重量外，還應(yīng) 考慮在傳送或操作過(guò)程中所產(chǎn)生的慣性力和振動(dòng)，以保證工件不致產(chǎn)生松動(dòng)或脫落。 手部驅(qū)動(dòng)力計(jì)算 本課題氣動(dòng)機(jī)械手的手部結(jié)構(gòu)如圖 32所示 ， 12 圖 32 齒輪齒條式手部 其工件重量 G=5公斤， V形手指的角度 ?1202 ?? ， mmRmmb 24120 ??? ,摩擦系數(shù)為 ?f (1)根據(jù)手部結(jié)構(gòu)的傳動(dòng)示意圖，其驅(qū)動(dòng)力為 : Rbp 2? N (2)根據(jù)手指夾持工件的方位 ，可得握力計(jì)算公式 : )( ?? ?? tgN )(25 )42560(39。 手腕的自由度 手腕是連接手部和手臂的部件，它的作用是調(diào)整或改變工件的方位，因而它具有獨(dú)立的自由度，以使機(jī)械手適應(yīng)復(fù)雜的動(dòng)作要求。 封M 手腕回轉(zhuǎn)缸的動(dòng)片與定片、缸徑、端蓋等處密封裝置的摩擦阻力 矩 ( cmN? )。 17 3e 手腕轉(zhuǎn)動(dòng)件的重心到轉(zhuǎn)動(dòng)軸線(xiàn)的偏心距 (cm) 當(dāng)工件的重心與手腕轉(zhuǎn)動(dòng)軸線(xiàn)重合時(shí)，則 11eG 0? . 手腕轉(zhuǎn)動(dòng)軸在軸頸處的摩擦阻力矩 封M ?封M )(2 12 dRdRf BA ? ( cmN? ) 式中 : 1d ， 2d 轉(zhuǎn)動(dòng)軸的軸頸直徑 (cm)。具體的安裝形式應(yīng)該根據(jù)本設(shè)計(jì)的具體結(jié)構(gòu)和抓取物體重量等因素來(lái)確定，同時(shí)在結(jié)構(gòu)設(shè)計(jì)和布局上應(yīng)該盡量減少運(yùn)動(dòng)部件的重量和減少對(duì)回轉(zhuǎn)中心的慣量。 可編程序控制器的工作過(guò)程 可編程序控制器是通過(guò)執(zhí)行用戶(hù)程序來(lái)完成各種不同控制任務(wù)的。開(kāi)機(jī)時(shí)， CPU首先使 I/0狀態(tài)表清零，然后進(jìn)行自診斷。 第四階段是輸出處理階段。同時(shí)成本低廉。也使我獨(dú)立設(shè)計(jì)的能里有了極大的提高。一般能自動(dòng)完成內(nèi)外圓柱面、圓錐 面、球面、圓柱螺紋、槽及端面等工序的切削加工。數(shù)控系統(tǒng)功能強(qiáng)，自動(dòng)化程度和加工精度也比較高，適用于一般回轉(zhuǎn)類(lèi)零件的車(chē)削加工。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。 Then in high school, think don39。嫌惡過(guò)自己的怯懦，最終卻發(fā)現(xiàn)有很多 緣分 ，有很多錯(cuò)過(guò)，好像冥冥之中真的已經(jīng)注定。 31 Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. The supersonic descent could happen as early as Sunda. The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。t start planning... Those years, those days of do, finally, like youth, will end in our life. 此刻，天空是陰暗的，空氣里有著剛下過(guò)雨之后的清新因子。想要的，不想要的，界限明確，好像沒(méi)有什么可以撼動(dòng)自己。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。s governing body, has also ordered an immediate investigation into the referee39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。成 本較低，自動(dòng)化程度和功能都比較差，車(chē)削加工精度也不高，適用于要求不高的回轉(zhuǎn)類(lèi)零件的車(chē)削加工。懇請(qǐng)老師給予以批評(píng)以及指正。在此，我首先向?qū)煴硎菊\(chéng)摯的感謝，并致以崇高的敬意 ! 本次畢業(yè)設(shè)計(jì)是大學(xué)三年間所學(xué)知識(shí)的綜合運(yùn)用，通過(guò)這次設(shè)計(jì)把這三年所學(xué)的基礎(chǔ)理論和專(zhuān)業(yè)課程作了一個(gè)總結(jié)和回顧，加深了對(duì)理論的理解，能夠掌握機(jī)械設(shè)計(jì)的全套思路，為即將走上工作崗位和以后的發(fā)展打下了一定的基礎(chǔ)。 工作環(huán)境適應(yīng)性好，不會(huì)因環(huán)境變化影響傳動(dòng)及控制性能。 當(dāng)輸入狀態(tài)信息全部進(jìn)入 I/0狀態(tài)表后， CPU工作進(jìn)入到第三個(gè)階段。其中存放輸入狀態(tài)信息的存儲(chǔ)器叫輸入狀態(tài)暫存器 。 6. 1可編程序控制器的選擇及工作過(guò)程 可編程序控制器的選擇 目前，國(guó)際上生產(chǎn)可編程序控制器的廠(chǎng)家很多，如日本三菱公司的 F系列PC,德國(guó)西門(mén)子公司的 SIMATIC N5系列 PC、日本 OMRON(立石 )公司的 C型、 P型PC等。單葉氣缸的壓力 P驅(qū)動(dòng)力矩 M的關(guān)系為 : 2 )( 22 rRpbM ?? , 或 )( 2 22 rRb Mp ?? 18 19 第五章 手臂伸縮、升降、回轉(zhuǎn)氣缸的尺寸設(shè)計(jì)與校核 手臂伸縮氣缸的尺寸設(shè)計(jì) 手臂伸縮氣缸采用標(biāo)準(zhǔn)氣缸，參看各種型號(hào)的結(jié)構(gòu)特點(diǎn)，尺寸參數(shù)，結(jié)合本設(shè)計(jì)的實(shí)際要求，氣缸用 CTA型氣缸，尺寸系列初選內(nèi)徑為 ? 100/63： 尺寸校核 ，只需校核氣缸內(nèi)徑 1D =63mm,半徑 R=滿(mǎn)足 使用要求即可 ,設(shè)計(jì)使用壓強(qiáng) MPaP ? , 則驅(qū)動(dòng)力： 2RPF ??? )(1246 26N? ???? 測(cè)定手腕質(zhì)量為 50kg,設(shè)計(jì)加速度 )/(10 sma? ，則慣性力 maF?1 )(5001050 N? ?? ，設(shè)定摩擦系數(shù) ?k , ? )(100 N? ?? ? 總受力 mFFF ?? 10 )(600 100500 N? ?? FF?0 所以標(biāo)準(zhǔn) CTA氣缸的尺寸符合實(shí)際使用驅(qū)動(dòng)力要求要求。 ?? — 起動(dòng)過(guò)程所轉(zhuǎn)過(guò)的角度 (弧度 )。 慣M 慣性力矩 ( cmN? )。一般氣缸缸筒壁厚與內(nèi)徑之比小于或