CN1019276B - 预缩管坯末端的轧管方法和装置 - Google Patents
预缩管坯末端的轧管方法和装置Info
- Publication number
- CN1019276B CN1019276B CN89104535A CN89104535A CN1019276B CN 1019276 B CN1019276 B CN 1019276B CN 89104535 A CN89104535 A CN 89104535A CN 89104535 A CN89104535 A CN 89104535A CN 1019276 B CN1019276 B CN 1019276B
- Authority
- CN
- China
- Prior art keywords
- pipe
- rolling
- rear end
- preshrunk
- roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009785 tube rolling Methods 0.000 title description 2
- 238000005096 rolling process Methods 0.000 claims abstract description 21
- 238000003801 milling Methods 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000005242 forging Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/12—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially parallel to the axis of the work
- B21B19/16—Rolling tubes without additional rollers arranged inside the tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
- Forging (AREA)
Abstract
本发明涉及通过轧制缩小管坯外径和壁厚的方法和装置。在将管坯末端插进轧机之前先设法缩小管坯末端的外径和壁厚，为此可采用预缩轧制管坯末端的装置，此装置可设于轧机的管坯纵向进给端的前面。具有四个预缩轧辊，并可使管坯自由地通过各预缩轧辊并使预缩轧辊压靠在管坯末端上进行预缩轧制。
Description
本发明涉及通过轧制缩小主要为筒形管坯的外径和壁厚所用方法，轧制时将管坯的前端插入轧机。
在热轧钢管时，在1000℃左右的温度下缩小筒形管坯的外径和壁厚。为此，在轧机内采用围绕管坯轴线设置的几个外轧辊，与此同时，在管坯中插入内心轴。在轧制过程中，当材料进入轧制区时材料进行流动并由于缩轧力的作用和轧制的几何原理会产生材料的延展倾向。管坯的延展在正常情况下可以受到其后面材料的阻止。但在轧制薄壁管坯末端时（外径与壁厚的比值约为10）剩余部分的材料量却不足以阻止管坯的延展，致使管坯末端延展而使管坯受卡停住或使轧辊在管坯上滑动，所得管坯末端呈漏斗状。除减少出产外（因必须切去漏斗部分）漏斗部分还带来很多麻烦，如必须采用较低的进给速度（较小的进给角），且不能如愿地制作各种薄壁管件。由于漏斗部分的形成，管件会在各后工序中和在中间传输过程中受卡停住。此时，势必在装卸上耗费时间并加大费用，而且还会使流水生产线后边的管件报废，因为这些管件会由于冷却过度而无法在各后工序中进行加工。漏斗部分还会在轧辊和传动部件中产生很大的
应力，甚至会使轧辊、联轴节和传动部件断裂。再一个缺陷是管件的检测很困难。因为这种检测都是在管件末端进行的。
日本专利申请昭61-74713号和特开昭49-113752号分别公开了一种将管坯前端送进轧机之前轧尖而使其端部壁厚减薄的方法和经拔长轧机及其后的减径轧机使产品的纵向壁厚分布均一的方法。
本发明的目的在轧制中防止形成上述漏斗部分，从而消除上述缺陷，提高生产能力。
为达到以上目的，本发明设法在将管坯末端插入轧机之前，预先使其缩径减厚。
通过所附各图可对本发明的加工方法，由此得出的管坯和相应装置作更详细的说明。
图1为Assel轧机中热轧管坯的原理图。
图2所示为所谓圈套的形成，这是在Asssel轧机中进行轧制时所产生的。
图3为联线轧制管坯末端所用装置的简图。
图4所示为通过本发明的加工方法所得管坯末端。
图1所示为在Assel轧机中热轧管坯的正常情况。在加热至约1000℃的管坯1中插入一根心轴5。然后将装有心轴的管坯插入轧机轧辊2a、2b、2c中间的引入部分3内，再将其推向Assel轧机所特有的凸肩4，在此凸肩部位即进行缩轧，然后使管坯通过磨光部分6
而最后成形。由于轧辊2a、2b、2c和管坯1之间的摩擦作用，管坯1边进给边转动。由于在管坯1内受轧辊2a、2b、2c作用的管坯外面和紧贴在心轴5上的管坯内面之间存在着相对的速度差异而在缩轧区内产生类三角形的所谓圈现象如图2所示。
这种圈套是由于后面未受缩轧的材料所起阻挡作用造成的。在管坯的末端，特别是对于材料量较小的薄壁管坯，这种阻挡作用减小，圈套部分便会在相当大的程度上延展，致使管坯受卡停住或使轧辊2a、2b、2c和管坯1之间在进给管坯时出现滑动摩擦，从而使管坯1具有大体上延展成漏斗状的末端。
为消除这种漏斗状末端的形成和随之产生的上述缺陷，在将管坯末端插进缩轧区之前先缩小其直径和（或）壁厚。这种预先缩径减厚加工可在Assel轧机的基本缩轧之前任何时间采用任一合适的方法进行，例如采用锻造、轧制一类塑压加工或车削一类加工。
图3所示是一种较为合理的装置，可用以联线完成所需预缩轧制。四个预缩轧辊7a、7b、7c、7d可装在Assel轧机前并围住管坯1自动地定中心。这些预缩轧辊成对地装在两个可绕铰链轴9转动的杆件8a、8b上，此铰链轴9设置在管坯1和各轧辊的下方。对杆件8a、8b可用作力装置，最好用液压缸使其彼此压靠，从而使各轧辊7a、7b、7c、7d相互压合而压靠在管坯1上。在正常位置上，管坯1可自由地通过各预缩轧辊，但在管坯1末端到达这些轧辊中间时，作力装置即动作而使各轧辊压靠在管坯1上，并在管坯1继续进给
时缩小其壁厚和直径，从而使其末端取得图4所示外形。可以采用手动操作的作力装置，但最好使预缩轧制装置具有传感器，此传感器可在适当距离内采用光电管遥感管坯末端的通过而发出信号，从而使杆件8a、8b和各预缩轧辊压靠在管坯上。
铰链轴9安装在销子10上，此销可装入Assel轧机机架上的相应洞孔内。这样可以不必为各预缩轧辊专设昂贵的支架。
还可以将预缩轧制与管坯在穿孔轧机中的穿孔加工结合起来进行，这时须将穿孔顶头的位置改置于穿孔加工的末端。
本实施例虽然仅涉及在Assel轧机中热轧管坯，但所述方法显然也适用于存在类似问题的其他轧机。
Claims (8)
1、一种通过轧机轧制一个主要为筒形的管坯来缩小其外径和壁厚的方法，轧制时将管坯的前端插进轧机内，其特征是在管坯后端进入轧机缩轨区之前预先缩小该后端的直径和壁厚。
2、根据权利要求1所述的方法，其特征是采用塑压加工预先使管坯后端缩径减厚。
3、根据权利要求2所述的方法，其特征是采用轧制预先使管坯后端缩径减厚。
4、根据权利要求2所述的方法，其特征是采用锻造预先使管坯后端缩径减厚。
5、实施权利要求1所述方法的装置，其特征是沿纵向进给方向在轧机前设有可压靠在管坯（1）上的并可从管坯（1）移开的预缩轧辊（7a，7b，7c，7d），预缩轧辊（7a，7b，7c，7d）配有一个探测器，用于探测管坯后端的通过并发出信号，使预缩轧辊压靠在管坯上。
6、如权利要求5所述的装置，其特征是预缩轧辊（7a，7b，7c，7d）对称地围绕管坯（1）分布，并装在杆件（8a，8b）上，杆件（8a，8b）支承在一个铰链轴上，通过作力装置该杆件可朝着管坯运动。
7、如权利要求6所述的装置，其特征是作力装置由一个液压缸构成，借助该液压缸可使杆件（8a，8b）压向管坯。
8、如权利要求5至7中任意一项所述的装置，其特征是该装置与轧机机架固定相连。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3823135.2 | 1988-07-05 | ||
| DE3823135A DE3823135C3 (de) | 1988-07-05 | 1988-07-05 | Methode und Anordnung, durch Walzen den Außendurchmesser und die Wanddicke einer hauptsächlich zylindrisch gehohlten Rohrluppe zu reduzieren |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1039981A CN1039981A (zh) | 1990-02-28 |
| CN1019276B true CN1019276B (zh) | 1992-12-02 |
Family
ID=6358231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89104535A Expired CN1019276B (zh) | 1988-07-05 | 1989-07-04 | 预缩管坯末端的轧管方法和装置 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5125251A (zh) |
| EP (1) | EP0423159B1 (zh) |
| CN (1) | CN1019276B (zh) |
| CS (1) | CS412589A2 (zh) |
| DE (2) | DE3823135C3 (zh) |
| ES (1) | ES2014170A6 (zh) |
| WO (1) | WO1990000449A1 (zh) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1252165B (it) * | 1991-12-04 | 1995-06-05 | Giulio Properzi | Procedimento e gruppo di laminazione di metalli per la produzione di una barra o vergella tonda da una barra o vergella tonda di maggiore diametro |
| DE4242423C1 (de) * | 1992-12-11 | 1994-01-05 | Mannesmann Ag | Vorreduktionseinrichtung |
| DE4428530C5 (de) * | 1994-08-12 | 2005-11-10 | Kocks Technik Gmbh & Co. Kg | Verfahren und Walzgerüst zum Schrägwalzen von Rohren |
| DE4431410C1 (de) | 1994-08-24 | 1995-11-16 | Mannesmann Ag | Verfahren zum Walzen von Hohlblöcken auf einem Asselwalzwerk |
| DE4433397C1 (de) | 1994-09-12 | 1995-09-28 | Mannesmann Ag | Kalibrierung der Walzen eines Schrägwalzwerkes |
| DE4437212C2 (de) * | 1994-10-18 | 2000-11-16 | Leifeld Gmbh & Co | Drückwalzmaschine |
| US5626050A (en) * | 1994-12-08 | 1997-05-06 | Aluminum Company Of America | Method of making metal ball bats |
| DE19732444C1 (de) * | 1997-07-22 | 1998-10-22 | Mannesmann Ag | Verfahren zur Vermeidung von Verlusten an den hinteren Rohrenden von in Asselstraßen gewalzten Warmfertigrohren |
| DE19748920C2 (de) * | 1997-10-30 | 2003-10-09 | Sms Demag Ag | Verfahren und Vorrichtung zum Verringern der Wanddicke eines Hohlblocks |
| DE19751205C2 (de) * | 1997-11-13 | 2003-10-09 | Sms Demag Ag | Verfahren zum Vermeiden von Triangulationen und Verlusten an den hinteren Endteilen von dünnwandigen Rohrluppen |
| US20040003638A1 (en) * | 1997-12-12 | 2004-01-08 | Schaefer Mark W. | Transfer of holographic images into metal sporting and fitness products |
| US6233991B1 (en) | 1999-01-26 | 2001-05-22 | Bryant Products, Inc. | Apparatus and method for spin forming a tube |
| US7181845B2 (en) | 2003-02-28 | 2007-02-27 | Bryant Products, Inc. | Roller with integral bearing assembly mount and method for manufacturing same |
| US7328599B2 (en) * | 2006-02-02 | 2008-02-12 | Thu Van Nguyen | Method and apparatus for making metal ball bats |
| CN102059251A (zh) * | 2010-08-31 | 2011-05-18 | 吴军 | 四辊行星热轧管机 |
| DE102012007379B4 (de) | 2012-04-12 | 2016-12-29 | Zhozef Rotenberg | Verfahren zum Schrägwalzen von zylindrischen Erzeugnissen |
| RU2556164C1 (ru) * | 2013-12-20 | 2015-07-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" | Способ получения тонкостенных труб на трубопрокатных агрегатах с трехвалковым раскатным станом |
| PL234301B1 (pl) * | 2018-04-09 | 2020-02-28 | Lubelska Polt | Narzędzia i sposób rozdrabniania struktury w walcarce skośnej trzema walcami |
| CN108730132A (zh) * | 2018-05-04 | 2018-11-02 | 江苏翔能科技发展有限公司 | 锁紧盘内环锻件及其近净成型工艺 |
| DE102022004111A1 (de) | 2022-11-03 | 2024-05-08 | Zhozef Rotenberg | Verfahren zum Schrägwalzen von Rohlingen mit der im Walzkaliber wirkenden axialen Zugkraft |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE521444C (de) * | 1929-09-19 | 1931-03-23 | Heinrich Stueting | Ausgangswerkstueck zur Herstellung gleichwandiger Rohre in Reduzierwalzwerken |
| US1983934A (en) * | 1931-07-18 | 1934-12-11 | John U Devine | Method and apparatus for making seamless tubes |
| US2556120A (en) * | 1948-09-03 | 1951-06-05 | Sutton Eng Co | Automatic roll adjustment |
| DE803230C (de) * | 1948-11-13 | 1951-04-02 | Westdeutsche Mannesmannroehren | Vorrichtung zum Anspitzen von Hohlbloecken fuer Rohrwalzwerke |
| FR1096090A (fr) * | 1953-03-27 | 1955-06-08 | Procédé de rétrécissement du diamètre extérieur aux extrémités des ébauchespour la fabrication des tubes sans soudure et dispositif pour la mise en oeuvre dudit procédé | |
| US3837449A (en) * | 1973-05-07 | 1974-09-24 | Fiat Allis Construct Machine | Transmission controlled spring applied steering brakes |
| DE2820865C2 (de) * | 1978-05-10 | 1980-07-03 | Mannesmann Ag, 4000 Duesseldorf | Vorrichtung zum Herstellen von Rohren |
| JPS56144809A (en) * | 1980-04-14 | 1981-11-11 | Nippon Steel Corp | Rolling method for pipe |
| JPS5741837A (en) * | 1980-08-27 | 1982-03-09 | Sumitomo Heavy Ind Ltd | Pipe end drawing apparatus in steel pipe manufacturing mill |
| JPS57134204A (en) * | 1981-02-09 | 1982-08-19 | Kawasaki Steel Corp | Method and device for controlling wall thickness of pipe end in drawing process of pipe |
| DE3215389A1 (de) * | 1982-04-24 | 1983-10-27 | Kocks Technik Gmbh & Co, 4010 Hilden | Verfahren und walzwerk zum herstellen nahtloser rohre |
| JPS6045962B2 (ja) * | 1982-11-15 | 1985-10-14 | 川崎製鉄株式会社 | 継目無鋼管製造設備における管端減肉圧延装置による減肉圧延方法 |
| JPS6174713A (ja) * | 1984-09-19 | 1986-04-17 | Kawasaki Steel Corp | 継目無鋼管の管端減肉方法および装置 |
-
1988
- 1988-07-05 DE DE3823135A patent/DE3823135C3/de not_active Expired - Fee Related
-
1989
- 1989-06-16 WO PCT/DE1989/000407 patent/WO1990000449A1/de active IP Right Grant
- 1989-06-16 DE DE58909706T patent/DE58909706D1/de not_active Expired - Fee Related
- 1989-06-16 EP EP89907063A patent/EP0423159B1/de not_active Expired - Lifetime
- 1989-07-04 CN CN89104535A patent/CN1019276B/zh not_active Expired
- 1989-07-04 ES ES8902360A patent/ES2014170A6/es not_active Expired - Lifetime
- 1989-07-05 CS CS894125A patent/CS412589A2/cs unknown
-
1991
- 1991-01-07 US US07/646,769 patent/US5125251A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE3823135C3 (de) | 1995-05-04 |
| DE58909706D1 (de) | 1996-08-29 |
| DE3823135C2 (zh) | 1991-04-25 |
| EP0423159B1 (de) | 1996-07-24 |
| US5125251A (en) | 1992-06-30 |
| ES2014170A6 (es) | 1990-06-16 |
| WO1990000449A1 (de) | 1990-01-25 |
| CN1039981A (zh) | 1990-02-28 |
| DE3823135A1 (de) | 1990-01-11 |
| CS412589A2 (en) | 1991-08-13 |
| EP0423159A1 (de) | 1991-04-24 |
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