【正文】 If the above changes are pensation pletely ,say 100 ％. The rolling machine is going to have a great rigidity, the seam will not be influence by the thickness and hardness of the ing material,and constant thickness can be produced. However, 100 ％rigid pensation will make a variation of bias fully reflected in the sheet, and the system is unstable and influence the rolling precision. In actual work, the percentage of pensation needs modulation to get the best performance of the rolling.4. pensation of a roller eccentric. Rolling the sheet of ～ , using the seam controll is effective. Use the rapid fourier transformation to find the distribution of the up and down supporting rolls, make bias pensation in practical control.5. the control of thickness. Detect the thickness offset of sheet at the export side by using the thickness instruments , control the roll seam or the rolling force, and raise the pressure gauge to zero. The thickness monitoring can eliminat the export thickness impact caused by the expansion and the rolling speed, eliminat the impact caused by entrance thickness changes and the hardness changes.6. the advanced thickness control. Through the gateway to the side entrance, detecting the thickness of the ining sheet. Then save the data into a linked list which is first in ang first out. After a delay, according to the thickness value saved, control the rolling seam or the rolling pressure ,reducing the deviation of the export . The delay time is determined by the diatance from the entrance to the centerline and the wire speed.7. the second traffic control. According to the flow constant theroy , the sheeet volume ing into the rolling machine in unit time equals to the volume of export sheet . Therefore, we can calculate the export thickness by measuring the speed in the entrance and export,and the thickness in the entrance. The offset of the calculated thickness with the given thickness is used to control the rolling pressure or rolling seam. At the same time, rectify the above control by the real thickness offset got from the export test.8. strain speed agc . Strain agc modulates the entrance strain of the rolling machine, making the export side thickness of deviation to zero. The speed agc modulats the speed of the rolling machine, making the export side thickness to zero. The most effective control of stress and tension, the speed are: Pressure control ～ ㎜ Tension control ～ ㎜Speed control ~0㎜9．multilevel agc control. There are two levels of controllers controls agc, the first step controls according to a thickness deviation, when the first stage was charged with exceeding the set parameters limitation, start the second level control, and adjust the arguments of the first and second class, until the first step was to return to the control limitation. There are four basic control patterns: stress and tension, tension and stress, speed and tension,tension and speed.Five ．the shape controlof sheetThe control of the shape of sheet is a urgent problem needed to be solved, and the difficulty is the shape instrument. The price is rather pricey, in order to solve this problem, the number of units are actively working on board apparatus. At present in the case of shorting of instruments in domestic, the control of the shape uses manual visually adjustment. 1. the control of bending up and down. By adjusting the force of rolling and changing the curved surface. Mainly settle the waves in center and bilateral.2. the control of rollgap and pressure. By adjusting the seams of the operation side and transmission side, lean the roll. Solve the waves mainly.3. The control of stage cooling. By readjustment coolant segments flows, change the local heat surface deformations expansionof the roller. It is the most effective form of controling the shape of thin sheet.Six ． the means of improving productivity Agc system configurates the workmanship data base of rolling, you can store up to the hundreds of rolling technology. Each rolled process includes：the lanes of rolling, the thickness of the entrance, the thickness of export, the width of material, the number of alloys, seams, rolling force, the rolling speed, the entrance tension, the export tension, the roller force and some of the controling parameters. When rolling different specifications sheet, we only need to callout the appropriate rolled process. It will set the rolling state automatically before rolling each time. The establish of rolled process database can use artificial experience,and aslo can use the mathematical models through software. The rolling process calculation software in the systemcan calculate the lanes of rolling, the seams, the rolling force, the rolling torque, etc. It is useful in the case of frequently changing the rolling process in small quantity and lots of specifications situation .并感謝同組同學(xué)及其他同學(xué)在畢業(yè)設(shè)計中對我的幫助和鼓勵。各位老師及師兄嚴(yán)謹?shù)闹螌W(xué)作風(fēng)及耐心負責(zé)的學(xué)術(shù)態(tài)度更是我今后工作中的學(xué)習(xí)典范。這與王老師、陳老師及各位師兄們的幫助是分不開的。順利如期的完成本次畢業(yè)設(shè)計給了我很大的信心，讓我了解專業(yè)知識的同時也對本專業(yè)的發(fā)展前景充滿信心。和老師的溝通交流更使我從經(jīng)濟的角度對設(shè)計有了新的認識也對自己提出了新的要求。雖然畢業(yè)設(shè)計內(nèi)容繁多，過程繁瑣但我的收獲卻更加豐富。和實際設(shè)計的結(jié)合鍛煉了我的綜合運用所學(xué)的專業(yè)基礎(chǔ)知識，解決實際工程問題的能力，同時也提高我查閱文獻資料、設(shè)計手冊、設(shè)計規(guī)范以及電腦制圖等其他專業(yè)能力水平，而且通過對整體的掌控，對局部的取舍，以及對細節(jié)的斟酌處理，都使我的能力得到了鍛煉，經(jīng)驗得到了豐富，并且意志品質(zhì)力，抗壓能力及耐力也都得到了不同程度的提升。5結(jié)論 結(jié)論畢業(yè)論文是本科學(xué)習(xí)階段一次非常難得的理論與實際相結(jié)合的機會。2%時。由圖可得出，當(dāng)允許誤差是177?？傻茫? ，=100HZ，取=。 伺服閥由產(chǎn)品樣本查得伺服閥的傳遞函數(shù)為： （61） 式中 ——伺服閥的固有頻率，為100HZ； ——阻尼比，； ——拉普拉斯算子；——伺服閥流量增益；——伺服閥的電流幅值；——伺服閥空載流量。軋機的執(zhí)行機構(gòu)是液壓缸及其控制元件――電液伺服閥，伺服閥受到位置調(diào)節(jié)的作用，通過液壓缸動作控制軋輥的運動。電液位置伺服系統(tǒng)時最基本和最常用的一種電液伺服系統(tǒng)，在使用設(shè)計系統(tǒng)之前必須對其進行動態(tài)仿真，來檢測它是否能夠滿足要求。因此，尺寸、公差及表面粗糙度均應(yīng)標(biāo)注清楚，技術(shù)要求中也應(yīng)予以說明。⑸ 集成塊零件圖的繪制集成塊內(nèi)孔道縱橫交錯，層次多，需要多個視圖及剖視圖才能表達清楚。電磁換向閥布置在集成塊的前面和后面，先布置垂直位置，后布置水平位置，要避免電磁換向閥的固定螺釘與閥口通道，集成塊固定螺釘相通。設(shè)計專用集成塊時，要注意其高度應(yīng)比裝在其上的液壓元件的最大橫向尺寸大2mm，以避免上下集成塊的元件相碰，影響集成塊緊固?？椎老嗤ǖ囊簤涸M可能布置在同一水平面或在直徑的范圍內(nèi)，否則要鉆垂直中間的軸孔。把制作好的液壓元件樣本放在集成塊各視圖上，進行布局。與液壓油管連接的液壓油孔可采用米制螺紋或英制螺紋。壓力油孔