【正文】 間軋件扭轉(zhuǎn)。“微型無扭軋機”以往預(yù)精軋機組為平/立交替布置的單獨傳動的懸臂機架或無牌坊軋機。無牌坊軋機是短應(yīng)力線高剛度軋機，但軋輥只能使用硬質(zhì)鋼輥，耐磨性不足。這是高速線材軋機的最新進展之一。布置，油膜軸承[13]。其優(yōu)點是安裝碳化鎢輥環(huán)，延長孔型壽命，主電機和傳動裝置由4套減為2 套，比常規(guī)獨立預(yù)精軋機可減少 22%成本，而軋件斷面小，軋制力小，懸臂軋機剛度不足的缺點不用考慮。 V型結(jié)構(gòu)因為軋制速度的提高和規(guī)格范圍增大，高速無扭軋機組的最后一架的成品尺寸有時很大，其上限已加大到Φ26mm，這時進線尺寸相應(yīng)加大，再加上采用低溫軋制和又要適用于軋制合金鋼產(chǎn)品等因素，都使軋制負(fù)荷急劇增加。其中Φ230mm重負(fù)荷機架設(shè)計軋制力達到 295KN。粗中軋采用高剛度軋機，預(yù)精軋和精軋采用重型及超重型無扭軋機，為高線生產(chǎn)采用低溫軋制創(chuàng)造了條件。這時需要電機功率也相應(yīng)提高。減定徑機組是近年來在高速線材軋機上采用的一項最新技術(shù)。在這種客觀需要下，美國摩根公司和意大利達涅利公司相繼開發(fā)出了線材定徑機組。前兩架為減徑機組，后兩架為定徑機組。機架型式均與無扭精軋機架相同，為懸臂式結(jié)構(gòu)，碳化鎢輥環(huán)。前兩架不設(shè)軸向調(diào)整機構(gòu)，后兩架有軸向調(diào)整及預(yù)加載機構(gòu)，以保證精確對中。成品精度可以達到177。目前，常用的吐絲機頭部定位法有兩種：精軋前飛剪延時剪切；改變吐絲機運行速度。改變吐絲機運行速度的原理：系統(tǒng)根據(jù)吐絲機位置偏差值（吐絲機的實際角度與設(shè)定角度之間的偏差）來調(diào)整吐絲機的轉(zhuǎn)速，在吐絲的時候使線材轉(zhuǎn)到預(yù)定位置。高速線材生產(chǎn)發(fā)展到今天，其技術(shù)已經(jīng)相當(dāng)成熟，國內(nèi)線材的生產(chǎn)技術(shù)已代表了世界先進水平。有力地推動國民經(jīng)濟快速發(fā)展。s highwire production, technological progress, a prehensive analysis of the advanced technology used in high speed wire rod mill in China, reviewed the trends and characteristics of China39。highspeed wire。development trends of the Hot Strip Mill production The wire is the minimum section size of a hotrolled material, wire rod rolling mill need to wire in the hot state circle, coil and the first delivery, it is also the 1960s, the midspeed wire rod mill and rolling and controlled cooling technology came with the wire production technology itself is getting more sophisticated and technological advances, highspeed wire rod mill product varieties and specifications range, plate weight, dimensional accuracy, surface quality and internal quality wire rod mill products than in the past have made great progress, and to better meet the needs of economic and technological wire is not only very versatile but also a great amount of, it occupies an important position in the various departments of the national to statistics, the national wire production accounts for % to % of all hotrolled material of the 5 percent in the United States, Japan, about 8 percent, about 9 percent in the United Kingdom, France accounted for about 14%, China accounted for about 20%.To sum up the use of wire can be divided into two categories: one is the wire directly, the main applications of reinforcement in reinforced concrete and welding pieces of other is the wire as raw material, after reprocessing, mainly by drawing into a variety of wire, after twisting into rope, or in the preparation of the steel wire mesh。after cold forging and rolling into the bolt, and made through a variety of machining and heat treatment of machine parts or tools。s rapid economic development, the use of wire rod as raw material is increasing, growing social demand for highquality wire , due to the backwardness of the funds as well as smelting technology, only a few number of wire rod plant capable of producing highgrade wire products, China is not imported from abroad, a small part of the bead wire, steel wire strand, plated zinc wire and other hardline 39。(1)steel wire varieties Q215 and Q235 is still larger proportion is still low, the proportion of high quality steel wire, alloy steel wire.(2)the quality of the product there is still a large problem, such as the purity of steel wire through the performance is not stable enough, the deviation of the carbon has a number of worldclass production line, but the variety and quality of the product has not yet reached world class highquality alloy steel wire, pure steel wire, free cutting steel wire rod imports also there are many problems of the variety and quality, such as spring steel alloy, stainless steel a year to the operating rate of highline calendar and production of advanced countries in the machine production line, generally the larger the gap, resulting in low yield in the calendar of the operating rate and the machine because In addition to the lack of billet supply, mainly for production preparation and replacement size used for longer working hours, low life expectancy of equipment, spare parts and lack of reserves, equipment maintenance, testing means are inadequate, resulting in downtime and maintenance and long working line in hot charging rate, fuel consumption, electricity consumption in advanced countries than there are also a quality of the main issues。s NKK Corporation Tokyo Steel wire rod and bar mill has endless rolling this are also a factory test welding without a head rolling, welding quality is not satisfactory, resulting in a greater loss coarse, medium rolling mill group of flat / vertical layout Crude Rolling short, the whole rolling site using a threeroll mill rolling, and subsequent rolling the stiffness is not conducive to the production of high precision a full level of rough rolling, intermediate rolling to singleline layout, mill on the flat / vertical alternate installation, the rolling, twisting road, reducing rolling to reverse the result of surface and internal defects and waste, and can choose to use the high stiffness mill, suitable for the production of highgrade prefinishing mill “microtwist mill” Prefinishing mill in the past as a separate drive / vertical alternating arrangement cantilever rack with or without arch cantilever mill small size, specifically to install the hard roll rings, but the poor mill mill is the high rigidity of the Short Stress mill roll can only use the hard steel roller, wear this end the new High Line will be the finishing mill group drive to extend the concept prefinishing is one of the latest progress of the highspeed wire rod is prefinishing four to large cantilever rolling mill, the top cross the 90 176。s Anshan Iron and Steel wire rod plant in each line of the prefinishing area using two Φ230mm micro no twist mill Hangzhou Iron and Steel, Baotou Steel, silver water new highspeed wire rod factory prefinishing mill uses a micro no twist mill ”approach, achieved good of the heavy and super heavyduty Vshaped structure The rolling speed increases and the size range increases, highspeed twisting mill group last one finished size is sometimes great, its upper limit has