Assel機(jī)組軋制薄壁管壁厚螺旋性不均研究
發(fā)布時(shí)間：2019-05-17 19:10
【摘要】：目前在熱軋無(wú)縫鋼管生產(chǎn)中,Assel三輥斜軋延伸工藝是高精度無(wú)縫鋼管的重要生產(chǎn)方式之一。盡管Assel軋管機(jī)組提高了軋機(jī)的金屬利用率,擴(kuò)大了產(chǎn)品的規(guī)格范圍,但在實(shí)際生產(chǎn)薄壁管時(shí)會(huì)出現(xiàn)軋后荒管壁厚螺旋性不均、內(nèi)螺紋深度嚴(yán)重等問(wèn)題。隨著開(kāi)鉆的油井越來(lái)越深,復(fù)雜地質(zhì)環(huán)境的油氣井對(duì)套管抗擠毀性能以及抗腐蝕性能提出了更高的要求。由于薄壁管螺旋性壁厚不均及內(nèi)螺紋深度嚴(yán)重,內(nèi)螺紋在承受高負(fù)荷(內(nèi)部壓力)易使套管發(fā)生螺旋狀裂紋,致使油井報(bào)廢造成巨大的經(jīng)濟(jì)損失,因此控制內(nèi)螺紋的產(chǎn)生或減輕內(nèi)螺紋深度研究無(wú)疑對(duì)提高石油套管的抗擠毀性能具有重要理論和現(xiàn)實(shí)意義。本文基于江蘇常寶鋼管股份有限公司Φ140mm Assel三輥軋管機(jī)組裝備及工藝條件,借助于三維實(shí)體建模軟件UG及商用有限元軟件Simufact,對(duì)5Cr鋼典型規(guī)格Φ160×6.5mm荒管Assel斜軋過(guò)程進(jìn)行了數(shù)值模擬仿真。系統(tǒng)研究了不同芯棒運(yùn)行方式、送進(jìn)角以及輾軋帶線型對(duì)軋后荒管內(nèi)螺紋深度的大小、縱向壁厚分布形態(tài)、橫向壁厚不均及單位螺距的影響。研究主要結(jié)論如下:(1)軋件的單位螺距隨軋件在變形區(qū)中軸向速度的增大而增大,變阻力為拉力芯棒以及增大送進(jìn)角的方法都能提高單位螺距,且芯棒的運(yùn)動(dòng)方式對(duì)軋件的單位螺距的影響較為明顯;(2)在三輥斜軋過(guò)程中,鋼管的橫截面變形是由圓形→三角形狀的“桃尖”→圓形的過(guò)程;(3)全浮動(dòng)芯棒軋后荒管內(nèi)螺紋最淺,固定芯棒次之,拉力芯棒最深;隨著送進(jìn)角的增大,軋后荒管的內(nèi)螺紋逐漸加深;雙曲線型輾軋帶相比較直線型輾軋帶軋后荒管的內(nèi)螺紋深度要淺;(4)當(dāng)芯棒的運(yùn)動(dòng)方式由固定芯棒變成拉力芯棒,軋后荒管壁厚不均的平均相對(duì)值逐漸增大,從2.756%增大到3.385%;當(dāng)送進(jìn)角從5°增大到7°時(shí),荒管壁厚不均的平均相對(duì)值從3.796%增加到了4.196%。
[Abstract]:At present, Assel three-roll cross rolling extension process is one of the important production methods of high precision seamless steel pipe in the production of hot rolled seamless steel pipe. Although Assel pipe mill improves the metal utilization ratio of rolling mill and expands the specification range of the product, there will be some problems such as uneven wall thickness helix and serious internal thread depth in the actual production of thin-wall pipe. As the drilling wells become deeper and deeper, the casing collapse resistance and corrosion resistance of oil and gas wells in complex geological environment are put forward higher requirements. Because the spiral wall thickness of thin-wall pipe is uneven and the depth of internal thread is serious, the internal thread is easy to cause spiral crack of casing under high load (internal pressure), resulting in huge economic loss caused by the scrapping of oil well. Therefore, it is of great theoretical and practical significance to control the generation of internal thread or reduce the depth of internal thread in order to improve the anti-extrusion damage performance of oil casing. Based on the equipment and process conditions of 桅 140mm Assel three-roll pipe mill in Jiangsu Changbao Steel Pipe Co., Ltd., with the help of three-dimensional solid modeling software UG and commercial finite element software Simufact,. The Assel cross rolling process of 桅 160 脳 6.5mm waste pipe of 5Cr steel was simulated by numerical simulation. The effects of different mandrel operation modes, feed angle and rolling strip line on the depth of internal thread, the distribution of longitudinal wall thickness, the uneven transverse wall thickness and the unit pitch of waste pipe after rolling were studied systematically. The main conclusions are as follows: (1) the unit pitch of the rolled piece increases with the increase of the axial velocity in the deformation zone, and the unit pitch can be increased by changing the resistance into a tension mandrel and increasing the feed angle. And the movement mode of the mandrel has obvious influence on the unit pitch of the rolled piece. (2) in the process of three-roll cross rolling, the cross section deformation of steel pipe is made of "peach tip" in the shape of circular triangle, (3) after full floating mandrel rolling, the internal thread of waste pipe is the shallower, the fixed mandrel is the second, and the tension mandrel is the deepest. With the increase of feed angle, the internal thread of waste pipe after rolling is deepened gradually, and the depth of internal thread of waste pipe after straight line rolling is lighter than that of linear rolling strip. (4) when the movement mode of mandrel changes from fixed mandrel to tension mandrel, the average relative value of uneven wall thickness of waste pipe increases gradually, from 2.756% to 3.385%; When the feed angle increases from 5 擄to 7 擄, the average relative value of uneven wall thickness of waste pipe increases from 3.796% to 4.196%.
【學(xué)位授予單位】：安徽工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE931.2;TG335.7
[Abstract]:At present, Assel three-roll cross rolling extension process is one of the important production methods of high precision seamless steel pipe in the production of hot rolled seamless steel pipe. Although Assel pipe mill improves the metal utilization ratio of rolling mill and expands the specification range of the product, there will be some problems such as uneven wall thickness helix and serious internal thread depth in the actual production of thin-wall pipe. As the drilling wells become deeper and deeper, the casing collapse resistance and corrosion resistance of oil and gas wells in complex geological environment are put forward higher requirements. Because the spiral wall thickness of thin-wall pipe is uneven and the depth of internal thread is serious, the internal thread is easy to cause spiral crack of casing under high load (internal pressure), resulting in huge economic loss caused by the scrapping of oil well. Therefore, it is of great theoretical and practical significance to control the generation of internal thread or reduce the depth of internal thread in order to improve the anti-extrusion damage performance of oil casing. Based on the equipment and process conditions of 桅 140mm Assel three-roll pipe mill in Jiangsu Changbao Steel Pipe Co., Ltd., with the help of three-dimensional solid modeling software UG and commercial finite element software Simufact,. The Assel cross rolling process of 桅 160 脳 6.5mm waste pipe of 5Cr steel was simulated by numerical simulation. The effects of different mandrel operation modes, feed angle and rolling strip line on the depth of internal thread, the distribution of longitudinal wall thickness, the uneven transverse wall thickness and the unit pitch of waste pipe after rolling were studied systematically. The main conclusions are as follows: (1) the unit pitch of the rolled piece increases with the increase of the axial velocity in the deformation zone, and the unit pitch can be increased by changing the resistance into a tension mandrel and increasing the feed angle. And the movement mode of the mandrel has obvious influence on the unit pitch of the rolled piece. (2) in the process of three-roll cross rolling, the cross section deformation of steel pipe is made of "peach tip" in the shape of circular triangle, (3) after full floating mandrel rolling, the internal thread of waste pipe is the shallower, the fixed mandrel is the second, and the tension mandrel is the deepest. With the increase of feed angle, the internal thread of waste pipe after rolling is deepened gradually, and the depth of internal thread of waste pipe after straight line rolling is lighter than that of linear rolling strip. (4) when the movement mode of mandrel changes from fixed mandrel to tension mandrel, the average relative value of uneven wall thickness of waste pipe increases gradually, from 2.756% to 3.385%; When the feed angle increases from 5 擄to 7 擄, the average relative value of uneven wall thickness of waste pipe increases from 3.796% to 4.196%.
【學(xué)位授予單位】：安徽工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE931.2;TG335.7
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 尹元德;王孟軍;李勝祗;陳漢駿;;皮爾格冷軋管橫向壁厚精度分析[J];熱加工工藝;2016年05期
2 徐海亮;于路強(qiáng);楊力;穆樹(shù)亮;米楠;;Assel軋機(jī)軋制過(guò)程的有限元模擬[J];冶金設(shè)備;2014年06期
3 濤雅;付玉艷;劉湖;;Assel斜軋鋼管機(jī)組產(chǎn)品缺陷分析[J];包鋼科技;2013年02期
4 袁方成;馬金輝;黎福華;;Assel軋管機(jī)軋制薄壁Φ70mm×3mm合金結(jié)構(gòu)鋼管工藝研究和輥型改進(jìn)[J];特殊鋼;2013年02期
5 張沖;郝潤(rùn)元;陳俊杰;;三輥軋制過(guò)程建模與模擬[J];機(jī)械工程與自動(dòng)化;2012年04期
6 元琳琳;雙遠(yuǎn)華;劉江林;裴晉興;;Assel斜軋生產(chǎn)線鋼管主要缺陷及分析[J];重型機(jī)械;2011年01期
7 栗志紅;;三輥軋管機(jī)軋制的鋼管內(nèi)螺紋缺陷分析[J];機(jī)械工程與自動(dòng)化;2010年04期
8 劉啟增;;Φ108mm Assel軋管機(jī)組技術(shù)裝備改造[J];鋼管;2010年04期
9 錢剛;胡旋;;Φ273mm Assel軋管機(jī)組生產(chǎn)薄壁無(wú)縫鋼管的工藝開(kāi)發(fā)[J];鋼管;2010年03期
10 李金鎖;王鑫;張玲;許U，
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