【正文】 摘 要 對(duì)于設(shè)計(jì)雙面鉆通臥式組合機(jī)床的液壓系統(tǒng)來說，基本任務(wù)是使該系統(tǒng)能夠高效、穩(wěn)定、快捷的完成孔加工問題?？梢娍准?工是工藝過程中的重要環(huán)節(jié)。 為了防止在鉆孔鉆通時(shí)滑臺(tái)突然前沖，在回油路中加背壓，按《液壓與氣壓傳動(dòng)》表 83，初選背壓 PB=8 105Pa。 采用用行程閥的速度換接回路，控制由快進(jìn)轉(zhuǎn)為工進(jìn)。為了使松開工件不受順序閥的影響，使單向閥與順序閥并聯(lián)。 （ 1）三位五通電磁閥： 最大通過流量 40L/min,所受壓力為 105Pa。調(diào)范圍，額定流量 20L/min。公稱通經(jīng) 20mm,額定流量 40min。本例取6 倍，因本系統(tǒng)有兩個(gè)泵，故油箱容積為 V=（ 6 2 20） L=240L 驗(yàn)算液壓系統(tǒng)的性能 壓力損 失的驗(yàn)算及泵壓力的調(diào)整 （ 1）工進(jìn)時(shí)的壓力損失驗(yàn)算及泵壓力的調(diào)整 工進(jìn)時(shí)管路中的流量小，流速也小，所以沿程壓力損失和 局部壓力損失都非常小，可以忽略不計(jì)。另兩個(gè)是 P1 孔與 P2 孔分別與泵的兩個(gè)壓力油口相連。設(shè)計(jì)出來的閥塊只是一部分且互換性較差，不能夠用于其他系統(tǒng)。 3. 液壓系統(tǒng)計(jì)算與選液壓元件。s 21 win. Michel Platini, president of European football39。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè)人的時(shí)候，自己的想法總是特別地清晰。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。s antiracism taskforce, is in London for the Football Association39。正是這孜孜不倦的教誨，使得我們無論在學(xué)習(xí)方面還是自身的素質(zhì)都有了一個(gè)長足的提高。 結(jié) 論 通過各位老師的指導(dǎo)、檢查，我完成了雙面鉆通臥式組合機(jī)床液壓系統(tǒng)的設(shè)計(jì)。 2. 集成塊設(shè)計(jì) 我設(shè)計(jì)的是左滑臺(tái)的液壓系集成塊 由于本系統(tǒng)元件較多，比較復(fù)雜，若設(shè)計(jì)一個(gè)集成塊比較困難，也比較復(fù)雜，且不易加工。 根據(jù)液壓缸輸入、排出的最大流量選取。 （ 13）壓力繼電器： 查《機(jī)械零件設(shè)計(jì)手冊》表 32157 選用型號(hào) HED20A20/63的彈簧管式壓力繼電器。查表《機(jī) 械零件設(shè)計(jì)手冊》 3226選用 X4FB10F 型號(hào)液控順序閥。查《機(jī)械零件設(shè)計(jì)手冊》表 301 泵總的η 1=η2=，則可計(jì)算出泵 1的出口壓力 Pp！ =（ +） 105Pa= 105Pa 泵 2 的出口壓力為 Pp2=（ +） 105Pa= 105Pa 則電動(dòng)機(jī)的功率為 P1=Pp1q1/η 1＋ Pp2q2/η 2=814W （ 2）工進(jìn) 則電動(dòng)機(jī)的功率為 P2= Pp1q1/η 1＋ Pp2q2/η 2=1201W （ 3）快退時(shí) 則電動(dòng)機(jī)的功率為 P3= Pp1q1/η 1＋ Pp2q2/η 2=997W 綜合比較，工進(jìn)時(shí)所需功率最大。見圖 3 （ 5） 定位、夾緊系統(tǒng)的減壓順序回路 因定位、夾緊系統(tǒng)的液壓缸的工作面積、行程均 不大，完全可由小泵對(duì)其單獨(dú)供油。 （ 2）快速運(yùn)動(dòng)回路和速度換接回路 根據(jù)此機(jī)床的運(yùn)動(dòng)方式和要求 ，采用差動(dòng)連接與雙泵供油兩種快速運(yùn)動(dòng)回路來實(shí)現(xiàn)快速運(yùn)動(dòng)。 確定液壓缸的主要結(jié)構(gòu)尺寸 （ 1）工作壓力的確定 工作壓力 P可根據(jù)負(fù)載大小及機(jī)器類型來初步確定。 關(guān)鍵詞： 集成塊 液壓系統(tǒng) 液壓缸 液壓閥 Abstract The radical mission is to make the system processing holes effectively、 steadily and rapidly to designing the doublefaced drill hydraulic pressure system. The hydraulic system I designed fits the work cycle and capability of this machine tool. I chose the reasonable hydraulic valve and designed to fix the integrate piece of tiein specially. Firstly, I analyzed the load, ensure the mostly technology parameter of executing element (hydraulic jar). Then I calculate the work pressure、flux and power of each work phase of the hydraulic jar. According to the result and work cycle, I chose doublepump to supply oil and differentia to connect the loop. I made sudden progressing to be tardily progressing with journey valve and made tardily progressing to be rapid backslide and stopping with journey switch. I controlled sudden progressing and tardily progressing with lowtension bulky flux pump and controlled tardily progressing and orientate clamping with hightension min flux pump. At last, I made the system satisfied the desire of work effectively、 steadily and rapidly. Secondly I designed the integrate piece of rightandleft slipway because the system was carved up to be rightandleft slipway and its oil tanker and work cycle are the same. There are 9 valves should to be fixed onto the integrate piece. Designing two integrate pieces is reasonable in my opinion through analyzing the hydraulic pressure system and drawing the solid chart. 5 valves as switch of pressure cabin and the tiein of tube leading to hydraulic jar besides tubes of returning oil should be fixed on the upper integrate piece, 4 valves should be fixed on the her one. A pedestal should also be designed and connected with the two pressure oil meatuses. The two integrate pieces and the pedestal could be connected with doubleedged bolts, the pedestal and the gasoline tank could also be connected with bolts. This design could satisfy the desires and its capability of checking is up to grade according to the putati