外文翻譯---冷軋橫向偏移量的控制性能-wenkub
2023-05-19 10:35:26 本頁面
【正文】 （ 10） 其中， 是,ijc延展系數(shù) , ()i r? 是主函數(shù)，一個 Chebyshev 多項式。 被加工板帶的側(cè)面在寬度方向的厚度變化和縱向平面內(nèi)的殘余應(yīng)力這兩個交叉的參數(shù)決定的板帶的質(zhì)量。這種近似模型在板帶的大部分部位足夠精確，但是在邊緣部位就不精確了。假定軋輥系有六個橫向控制激勵： （ 1） 工作棍水平壓力 （ 2） 中間棍水平壓力 （ 3） 中間棍水平竄動 （ 4） 工作棍相對于支撐棍兩側(cè)的水平偏移 （ 5） 工作棍的可控頂噴冷卻的理想精確響應(yīng) （ 6） 中間棍的可控頂噴冷卻的理想精確響應(yīng) 將頻譜值代入公式（ 10）并比較可得出各個激勵對板帶平面度的影響。另外兩個較分散的激勵則有更復(fù)雜的響應(yīng)。很顯然工作棍的水平偏移對激勵的靈敏度有很大的影響。瀑布似的圖形表示了靈敏度大小沿板帶邊沿的變化，圖 6b 則給出了大的負(fù)偏移的四次多項式響應(yīng)和主要的正偏移響應(yīng)。 圖 7 和圖 8 顯示，激勵的響應(yīng)主要受工作棍的水平偏移的影響。如果工作棍正偏移，則由中間棍承擔(dān)變形力，但是如果工作棍負(fù)偏移，則變形量會減小甚至?xí)撾x中間棍。總之，軋輥直徑的對激勵的影響相對與偏移量要小的多。 本文以公式的形式給出了現(xiàn)有的二維軋輥系模型可以延拓為允許軋輥在板帶所在平面內(nèi)變形。對于其它的激勵，逆向水平偏移的影響更大，但是卻更不利于提高靈敏度，因為，工作棍直徑的小的震顫的影響是工作棍纏繞中間棍，并且板帶的凸凹減少。長期以來，該裝置采用傳統(tǒng)的彈簧、橡膠墊、液壓等平衡裝置，實踐中發(fā)現(xiàn)采用這些平衡方式存在許多弊端，如彈簧平衡壓下不足、易損壞、過鋼時跳動嚴(yán)重，影響產(chǎn)品精度；橡膠墊平衡，平衡力過大，常因軋輥產(chǎn)生撓度而斷輥；液壓平衡環(huán)節(jié)過多、故障頻繁、易污染等。 粘性 性阻尼體可產(chǎn)生極強(qiáng)的粘稠摩擦力，吸收活塞運(yùn)動時外力所產(chǎn)生的巨大能量，這種特性使減震器或或緩沖器具有特殊的減震緩沖功能。母體制成后，需經(jīng)過補(bǔ)強(qiáng)、抗老化、增粘等多道工序，以完善其各項物理指標(biāo)性能。 hydraulic balance has too many links so that troubles often arise and it is easy to pollute. In order to solve these problems, rolling mill in 1964 which was on the basis of elastic damping technique, the shock absorber has a small volume, large loadcarrying ability and long service life, it was easy to use ,worked stably and didn’t need external device, it was accepted by many iron＆ steel enterprises soon. The brief introduction of the elastic damping technology＆ application The property of elastic damping materials Elastic damping material is a macromolecule material synthesized by many pounds, it was first used for industrial shock absorber in 1964 and has been continually improved and developed in the past decades. Today, elastic damping shock absorbing and suffering techniques have bee international acknowledged mature techniques and have been used by many famous machinery manufactures, such as SMS SchloemannSiemag AG. (1) Viscosity The viscosity of pasty elastic material can produce very strong stick friction and absorb tremendous energy produced by external force when piston moves, this special property makes shock absorber or buffer have special damping and buffering functions. (2) Compressibility When elastic damping material is exerted a very big external force, its volume contracts, the volume of contracted part is similar to liquid, its contraction can reach 15%.The special property makes its function better than spring. Preparation of elastic damping materials and their property The mother body of elastic damping material is a stable macromolecule pound, after it is synthesized by many kinds of carefully chosen industrial chemicals, through hydrolysis and crack then under the action of catalyst, make ionic openloop polymerizing. After the mother body is finished, supplying intensity, antiageing and adding viscosity etc. many processes are needed to perfect its different physical properties. Last finishe
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