【導(dǎo)讀】間后，經(jīng)常會(huì)遇到“沒有工作進(jìn)給”的故障。在維護(hù)實(shí)踐經(jīng)驗(yàn)的基礎(chǔ)上，本文提出的方法。以完成鉆、擴(kuò)、鉸、鏜、銑和攻絲等加工以及完成各種復(fù)雜進(jìn)給工作循環(huán)。要求，可在滑臺(tái)臺(tái)面上裝置動(dòng)力箱、多軸箱及各種專用切削頭等動(dòng)力部件。用液壓缸驅(qū)動(dòng)，在運(yùn)行很長(zhǎng)一段時(shí)間后經(jīng)常遇到“沒有進(jìn)入測(cè)試”的現(xiàn)象。做法，筆者在本文結(jié)束提出排除故障的方法。液壓系統(tǒng)的的液壓系統(tǒng)發(fā)生故障時(shí)的原則，示于圖1。油機(jī)液壓換向閥閥芯使閥門離開進(jìn)入系統(tǒng)工作。出口油路：左腔的液壓換向閥4→節(jié)流閥9→電磁換向閥5的左框架→石油盒;速是自動(dòng)降低，以免符合要求的工作進(jìn)給?！暗诙l道”的速度移動(dòng)到目的地時(shí)，滑臺(tái)會(huì)遇到死鐵停止和停止移動(dòng)。常小的，這是唯一用于彌補(bǔ)泄漏，在系統(tǒng)運(yùn)行時(shí)的壓力維持狀態(tài)。的工作進(jìn)給的切斷力是否超過正常壓力的泵或不和產(chǎn)生的噪聲從切削有無異常或不處理。表示切削力過大，如果出現(xiàn)異常。

　　

【正文】 e the number in the pressure meter in the fast forward, and it is indicated the resistance in the cylinder is highly large if the fastforward pressure is higher much。 also, the oil tube can be unloaded, the sliding table pressureplate can be loosened, and the sliding table can be lifted (if high heaviness can be felt, the internal resistance in the cylinder can be proved to be large). If this case can be confirmed definitely, it is necessary to change the hydraulic cylinder 四川大學(xué)錦江學(xué)院畢業(yè)論文（設(shè)計(jì)） 外文譯文 15 first, and then unfold the hydraulic cylinder to check it, repair or change the seal ring and hydraulic cylinder body for the sake of next convenience. Six, the hydraulic valve is examined. (1) Fault analysis: As the hydraulic valve cannot work normally owing to the spool clamped by the oil contamination, the pressure oil directly flows back to the oil return box, there is no pressure oil in the oil inlet of the hydraulic cylinder, or the backpressure is excessively higher owing to the unsmooth oil returning, and thereby the hydraulic cylinder is forced to be unable to move. (2) The fault removal methods can be divided into three steps: Step 1: Check the electrichydraulic directional valve: If the spools of the main valve 4 and pilot valve 5 in the manualoperation electrichydraulic directional valve cannot be pushed, it indicates the spools are clamped, and it is necessary to unfold them, and then the valve bodies and spools are necessarily cleaned for the using of reassembly, or new valve can replace the old. If the directional valve can be changed and the sliding table moves, it indicates that the electric line of the solenoid directional valve 5 encounters faults, so it is necessary to first check whether the power supply is on or not, and the solenoid coil is broken by fire or not. Now, seriously listening to the noise of the solenoid coil operation can proceed to find the problems, and it is necessary to change the solenoid coil if there is a problems. Otherwise, step 2 can proceed if the electrichydraulic directional valves 4 and 5 are found to work normally. Step 2: Check the speed control valve: Let the manual speed control valves 15 and 16 enlarge the openmouths。 if the hydraulic cylinder has actions, it indicates that the speed control valves 16 and 15 are blocked and it is necessary to unload it to be cleaned. Otherwise, the speed control valves 16 and 15 can be rotated until the most loosened. Then, step 3 can be carried out. Step 3: Check the sequence valve and the back pressure valve: If the spools of the manual sequence valve 18 and the back pressure valve 19 have no actions, it indicates that the spools are clamped at the offposition, so the oil cannot pass and the oil lines encounter quite high back pressure, causing the causing the hydraulic cylinder unable to move. The main reason for this case may be the toodirtiness of the oil, the oil filtering or replacement. 3 Conclusion In the analysis and removal of the faults of the hydraulic system, the working principles, structures and functions of the hydraulic ponents and system are first necessary to be known. In the faults search, it is necessary to check one by one until the fundamental reason is discovered. Also, there are two aspects necessary to be stressed in the proposal of each possible reason: 四川大學(xué)錦江學(xué)院畢業(yè)論文（設(shè)計(jì)） 外文譯文 16 (1) check whether the relevant electric ponents encounter faults or not and implement the removals。 (2) it is necessary to identify whether the relevant peripheral conditions are normal or not before the analysis on the key ponents. It is necessary to first analyze and remove the faults of the hydraulic pump and cylinder and then analyze the faults of the hydraulic valve, because the faults of the hydraulic pump and cylinder are easier to be analyzed, but need long time to be repaired. Therefore, in order to reduce the maintenance time, the faults of the hydraulic pump and cylinder should be checked and removed at the first。 if problems exist, their replacements should be implemented first, and then their maintenance should be prepared for next time. This method is especially applicable to the production line, because there are many modular sametype machine tools in a production line with multiple reserved hydraulic ponents, fast production time and short machinehalt time. Therefore, the application of such a method can not only reduce the downtime, improve the efficiency and correctness, and also can ease the contradiction Nothing to do in most times but too busy within a highly short time of the mechanists at most enterprises. References [1] Liu Yanjun. Hydraulic System Using and Maintenance. Beijing: Chemical Industry Press, 2020. [2]Huang Zhijian, Wu Baihai. Selective Cases of Hydraulic Equipment Fault Diagnosis and Maintenance. Beijing: Chemical Industry Press, 2020. [3]Zhang Qin, Xu Gangtao. Hydraulic and Pneumatic Transmission Technologies. Beijing: Higher Education Press, 2020