EP3812056A1 - Tube métallique à paroi épaisse de petit ou moyen diamètre et son procédé de préparation - Google Patents

Tube métallique à paroi épaisse de petit ou moyen diamètre et son procédé de préparation Download PDF

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Publication number
EP3812056A1
EP3812056A1 EP19838335.8A EP19838335A EP3812056A1 EP 3812056 A1 EP3812056 A1 EP 3812056A1 EP 19838335 A EP19838335 A EP 19838335A EP 3812056 A1 EP3812056 A1 EP 3812056A1
Authority
EP
European Patent Office
Prior art keywords
tube blank
metal tube
tube
blank
wall
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.)
Pending
Application number
EP19838335.8A
Other languages
German (de)
English (en)
Other versions
EP3812056A4 (fr
Inventor
Qingle HAO
Jingtao HAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3812056A1 publication Critical patent/EP3812056A1/fr
Publication of EP3812056A4 publication Critical patent/EP3812056A4/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • B21F23/005—Feeding discrete lengths of wire or rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/08—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
    • B21B17/12—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills in a discontinuous process, e.g. plug-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
    • B21H1/20—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling rolled longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/22—Making articles shaped as bodies of revolution characterised by use of rolls having circumferentially varying profile ; Die-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/18—Forging machines working with die jaws, e.g. pivoted, movable laterally of the forging or pressing direction, e.g. for swaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K29/00—Arrangements for heating or cooling during processing

Definitions

  • the invention involves the technical field of metal tube material processing. Furthermore, the invention involves a medium-small-aperture thick-wall metal tube and a preparation method thereof.
  • the method for forming the medium-small-aperture thick-wall (D/S is in the range of 2-20) metal tube mainly comprises extrusion, rolling, and the like.
  • the extrusion forming production efficiency is low so that the product cost is high, the market competitiveness is not achieved, and the method is generally used for producing very few metal tubes which cannot be or are difficult to produce by other processes.
  • Hot rolling forming mainly includes periodic tube rolling, three-roller skew rolling forming and tension-reducing forming.
  • the rotary forge mill feeds the tubing into a rolling groove composed of a mandrel and a periodic reciprocating moving roll-pass at a certain frequency.
  • the inner wall of the tube is supported by the mandrel, and the tube blank is rolled by a gradually shrinking variable-cross-section roll-pass so that the functions of reducing the diameter and reducing the wall are realized.
  • the common rotary forge mill is mainly the two-roller pilger mill.
  • the three rollers of the three-roller skew rolling mill are uniformly distributed around the rolling center line at 120 degrees, and the axes of the rollers and the rolling center line are inclined and crossed to form a certain angle (i.e. a rolling angle and a feeding angle), so that the tube blank spirally advances under the action of the rollers, and the outer surface of the rolled tubing can form a "spiral line", influencing the surface quality, and the rolling jamming being caused by a "triangular" defect which easily appears at the tail part.
  • a certain angle i.e. a rolling angle and a feeding angle
  • a three-roller tension reducing mill generally comprises more than 10 racks to form a series of roll-passes. Tension is provided through the speed difference of the rotating speeds of rollers of adjacent racks, so that hollow reducing of the tube blank is completed. But due to a large number of racks, the equipment investment is large, the production line is long, the occupied area is large, and the equipment adjustment and control are complicated.
  • the invention provides a medium-small-aperture thick-wall metal tube and a preparation method thereof.
  • the invention has the characteristics of forging and rolling, can realize single pass and large deformation amount processing of the metal tube blank, and has the advantages of short process flow, high product dimensional accuracy ( ⁇ 0.2mm), good quality of the inner wall and outer wall surface and low cost.
  • One object of the present invention is to provide a medium-small-aperture thick-wall metal tube.
  • the cross-sectional diameter of the metal tube ranges from 30mm to 160mm, dimensional accuracy is ⁇ 0.2mm, and a ratio of an outer diameter of the metal tube to a wall thickness of the metal tube is greater than 2 to less than or equal to 20.
  • the inner wall and outer wall of the metal tube are free of peeling, dents, or cracks.
  • the preparation method comprises:
  • the outer diameter of the tube blank is 40-180mm and the cut length is 0.5-10m.
  • step (3) when cold forming is carried out, the tube blank is fed and then directly fed into a composite forging and rolling forming device; when hot forming is carried out, the blank is heated to a target temperature through an induction heating device and then fed into the composite forging and rolling forming device.
  • the induction heating device is a medium-frequency induction heating coil and the target temperature range is 800-1200°C.
  • the composite forging and rolling forming device is composed of three swinging mold blocks, the mold blocks are arranged at equal intervals around the central axis of the tube blank at 120 °, the mold blocks synchronously swing through a crank connecting rod mechanism driven by a motor, the mold blocks rotate around a connecting shaft thereof and simultaneously do reciprocating linear movement with the connecting shaft, straight gears connected through flat keys are mounted at two ends of the connecting shaft, and the moving displacement and rotating angle of the mold are controlled by the straight gears.
  • the invention can specifically adopt the following technical scheme.
  • the process comprises the following steps: (1) selecting an appropriate tube blank and cutting to length; (2) mounting the tube blank on a feeding rack, wherein a tail end of the tube blank is tightened by a clamping device, a front end of the tube blank is supported by a supporting roller, and it is ensured that a core mold device passes through an inner hole of the tube blank; (3) feeding the tube blank in by 5-30mm by a feeding mechanism before starting each pass at a feeding speed of 1-3m/min, wherein, when cold forming is carried out, the tube blank is fed and then directly fed into a composite forging and rolling forming device; when hot forming is carried out, the blank is heated to a target temperature through an induction heating device and then fed into the composite forging and rolling forming device; (4) after each forming of the tube blank in the composite forging and rolling forming device is completed, rotating the tube blank by 15-90° around the central axis of the tube blank, feeding in the tube blank by 5-30mm again, and then feeding the tube blank into the composite forging and rolling
  • the process mainly comprises the following steps:
  • the blank selected in the invention comprises a high-frequency longitudinal welded tube and a seamless tube, the material requirement comprises a steel tube and nonferrous metal tubes such as aluminum, copper, magnesium and titanium and the like, the outer diameter of the tube blank is 40-180mm, and the cut length is 0.5-10m.
  • the forming mold is composed of three swinging mold blocks, the mold blocks are arranged at equal intervals around the central axis of the tube blank at 120 °, the mold blocks synchronously swing through a crank connecting rod mechanism driven by a motor, the mold blocks rotate around a connecting shaft thereof, and meanwhile, the connecting shaft is doing a reciprocating linear movement, and the moving displacement and the rotating angle of the mold blocks strictly correspond to each other.
  • the feeding speed of the blank is 1-3m/min, and the feeding amount of each time is 5-30mm;
  • the process can be used for cold forming and hot forming
  • the induction heating device in step (3) is a medium-frequency induction heating coil, and the forming temperature range is 800-1200°C;
  • the invention is suitable for forming medium-small-aperture metal tubes made of various metal materials, the outer diameter of the product is in the range of 30-160mm, and the ratio (D/S) of the outer diameter of the product to the wall thickness of the product is greater than 2 to less than or equal to 20.
  • the dimensional accuracy of the metal tube product obtained in the invention is ⁇ 0.2mm; the beneficial effects of the above-mentioned technical scheme provided by the invention are as follows:
  • the tube blank is mounted on a feeding rack 7, and the tail end of the tube blank is tightened by a hydraulic chuck 27. Meanwhile ensuring that core mold device 7 passes through the inner hole of the tube blank, the blank is fed in 25mm at a feeding speed of 1.5 m/min.
  • the tube blank enters an induction heating coil 4 and is heated to 1000 °C and then enters a forming rack 3.
  • the tube blank is rotated by 60 ° around the central axis of the tube blank, and the tube blank is fed in 25mm again for forming until the front end of the tube blank enters a receiving rack 1.
  • the receiving mechanism clamps the front end of the tube blank, while the material feeding rack releases the tail end of the tube blank.
  • the tube blank continues to advance under the driving of the receiving mechanism until the whole tube blank is formed, and the tube blank is cooled and then cut to length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP19838335.8A 2018-07-17 2019-07-09 Tube métallique à paroi épaisse de petit ou moyen diamètre et son procédé de préparation Pending EP3812056A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810783775.9A CN110722016A (zh) 2018-07-17 2018-07-17 一种中小口径厚壁金属管及制备方法
PCT/CN2019/095282 WO2020015556A1 (fr) 2018-07-17 2019-07-09 Tube métallique à paroi épaisse de petit ou moyen diamètre et son procédé de préparation

Publications (2)

Publication Number Publication Date
EP3812056A1 true EP3812056A1 (fr) 2021-04-28
EP3812056A4 EP3812056A4 (fr) 2021-09-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19838335.8A Pending EP3812056A4 (fr) 2018-07-17 2019-07-09 Tube métallique à paroi épaisse de petit ou moyen diamètre et son procédé de préparation

Country Status (4)

Country Link
EP (1) EP3812056A4 (fr)
JP (1) JP7106004B2 (fr)
CN (1) CN110722016A (fr)
WO (1) WO2020015556A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114260327B (zh) * 2021-12-20 2022-08-30 大连理工大学 径向连续挤压制备轴向变截面管材的方法
CN114769352B (zh) * 2022-03-21 2024-07-23 温州英特不锈钢有限公司 一种不锈钢管成型方法
CN114833296B (zh) * 2022-05-25 2023-07-25 江苏明越精密高温合金有限公司 一种管坯的制坯设备
CN115608900B (zh) * 2022-12-16 2023-02-24 太原理工大学 一种金属包覆材料波平径向锻造复合设备及其方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA403835A (fr) * 1942-03-31 B. Tiedemann Julius Machine a etampage du tuyaux
US2247863A (en) * 1939-05-27 1941-07-01 Smith Corp A O Pipe swaging machine
HU155159A (fr) * 1964-10-21
US3357223A (en) * 1965-05-28 1967-12-12 Kent Owens Machine Co Tube reducing machine
US3404449A (en) * 1965-07-19 1968-10-08 Sharon Tube Company Heavy walled pipe manufacture
US4157025A (en) * 1977-12-05 1979-06-05 Berezin Evgeny N Method and mill for rolling metal billets
JPH04319009A (ja) * 1991-04-16 1992-11-10 Nippon Steel Corp 鋼管の高速熱間圧延工程における、圧延ロール表面変位のオンライン測定による鋼管圧延方法
CN101249603B (zh) * 2008-04-09 2010-09-01 宝鸡市浩源特种材料有限公司 高强度高硬度合金的轧锻一体化工艺及其轧锻设备
CN101633115A (zh) * 2009-08-06 2010-01-27 刘怀文 一种生产高级合金钢无缝钢管的新方法
CN104475479B (zh) * 2014-09-25 2016-08-24 北京科技大学 一种利用旋锻技术制备小口径厚壁金属管的工艺
CN105710273B (zh) * 2016-01-18 2017-11-03 上海理工大学 轿车等速万向传动轴旋锻周向进给工艺参数确定方法
CN208495380U (zh) * 2018-07-17 2019-02-15 韩静涛 一种复合锻轧金属管成形机
CN208695986U (zh) * 2018-07-17 2019-04-05 韩静涛 一种中小口径厚壁金属管

Also Published As

Publication number Publication date
EP3812056A4 (fr) 2021-09-22
JP2021530363A (ja) 2021-11-11
WO2020015556A1 (fr) 2020-01-23
CN110722016A (zh) 2020-01-24
JP7106004B2 (ja) 2022-07-25

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