WO2020144549A1 - Appareil et procédé permettant d'épaissir un tube au niveau de son bord - Google Patents

Appareil et procédé permettant d'épaissir un tube au niveau de son bord Download PDF

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Publication number
WO2020144549A1
WO2020144549A1 PCT/IB2020/050046 IB2020050046W WO2020144549A1 WO 2020144549 A1 WO2020144549 A1 WO 2020144549A1 IB 2020050046 W IB2020050046 W IB 2020050046W WO 2020144549 A1 WO2020144549 A1 WO 2020144549A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
support member
brim
punch
block
Prior art date
Application number
PCT/IB2020/050046
Other languages
English (en)
Inventor
Pala LAKSHMIKANT
Rahul Kumar Verma
Gujre Vinay Sanjay
Vishal Kalubhai BHARODIYA
Original Assignee
Tata Steel Limited
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 Tata Steel Limited filed Critical Tata Steel Limited
Priority to JP2021539520A priority Critical patent/JP7416804B2/ja
Priority to EP20703286.3A priority patent/EP3906128A1/fr
Priority to BR112021013381-0A priority patent/BR112021013381A2/pt
Publication of WO2020144549A1 publication Critical patent/WO2020144549A1/fr
Priority to CONC2021/0010324A priority patent/CO2021010324A2/es

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/06—Swaging presses; Upsetting presses
    • 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
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B21J5/022—Open die forging

Definitions

  • the present disclosure relates to the field of manufacturing technology. Particularly, but not exclusively, the present disclosure relates to an apparatus for forming or thickening a tube. Further embodiments of the present disclosure discloses apparatus and process for thickening the tube at its brim.
  • a tube is a long hollow cylinder made of materials such as metal, plastic or composites.
  • the tubes may be used in various applications in the field of domestic, medical, fuel gas distributions, automotive and other applications including air conditioning and refrigeration.
  • tubes may be used in frames, seating systems, fuel delivery components and automotive link arms require tubes to be welded in series to create an integrated frame.
  • the tubes may be welded using a various known welding methods such as MIG welding, flux-cored arc welding, TIG welding, stick welding etc. depending upon the material of the tube and the size of the tube. Welding is a process of joining parts together by heating the surfaces to the point of melting.
  • the fusion zone is a section of the material that is present after an object has been welded.
  • the fusion zone begins and ends at the portion of the material that have been coalesced. This zone will have a chemical composition that is a mixture of the substrate being welded together and any additional filler material that may have been used.
  • the weld interface is a region composed of an unmixed zone of weld.
  • the heat affected zone (HAZ) is the area of the base material which is not melted but its micro structure and properties are altered by the welding.
  • the fusion zone and the HAZ acts a stress raiser zone in the material.
  • the stress raiser zones increase stress concentration factor, further reducing the fatigue behavior of the welded connection.
  • the tubes of uniform higher thickness can be used, or tubes thickened only at its free ends can be used in the automotive applications.
  • the tubes of higher uniform thickness can be used in the application, but it adds unnecessary weight to the overall assembly. The latter approach i.e., the use of tubes thickened at the ends ensures overall weight reduction of the entire assembly as only the end parts which are to be welded are thickened.
  • variable thickness tubes are flexible rolling, swage auto-frettage process, tube drawing using position controlled mandrel methods, extrusion with special die setup and also internally and externally upsetting ends of the tube.
  • the ends of the tubes can be thickened using the above mentioned process.
  • the above said process have several restraints such as higher investment in tooling and/or low productivity due to increased cycle time.
  • the present disclosure is directed to overcome one or more limitations stated above.
  • an apparatus for thickening a tube at its brim includes a first support member, that is configured to rigidly support a first longitudinal surface of the tube along its length excluding one or both ends of the tube.
  • the apparatus further includes a second support member configured to rigidly support a second longitudinal surface of the tube along its length excluding one or both ends of the tube.
  • the apparatus also includes a punch driven by an external power source, wherein the punch is configured to exert force on one or both ends of the tube. The application of force by the punch plastically deforms the ends of the tube, thereby thickening the tube at one or both ends.
  • the apparatus includes a block driven by a first external power source, wherein a longitudinal force on the block is configured to impart lateral outward movement on the second support member to further support the second longitudinal surface of the tube.
  • the block is wedge-shaped.
  • the first support member includes an outer tube holder and an outer insert. Also, the first support member is driven by a second external power source.
  • the outer tube and the outer insert are joined through at least one of mechanical joining and thermal joining.
  • the ends of the outer insert are chamfered, such that the ends of of the outer insert define a portion of the die for the plastic deformation of one or both ends of the tube.
  • the second support member includes an inner tube holder and an inner insert.
  • the inner tube holder and the inner insert are joined through at least one mechanical joining or thermal joining process.
  • the one or both ends of the inner insert are chamfered, such that the ends define a portion of the die for plastic deformation of the ends of the tube.
  • the shape of the inner tube holder corresponds to shape of the block.
  • the external power source is a hydraulic drive.
  • the first support member and the second support member are chamfered apart at the either extreme ends to be in non-contact with the tube’s brim.
  • the first longitudinal surface of the tube is the outer surface of the tube and the second longitudinal surface of the tube is inner surface of the tube.
  • a tube is formed using the apparatus.
  • the tube including, a body portion and a brim portion at one or both ends of the of the body portion.
  • the brim portion at one or both ends of the body portion is such that, thickness of the brim portion of the tube is greater than thickness of the body portion of the tube.
  • the body portion of the tube is of uniform thickness. In an embodiment of the disclosure, the thickness of the brim portion of the tube is may or may not uniformly vary from body portion thickness to 20-30% greater than the body portion thickness.
  • a process of thickening a tube at its brim includes supporting by a first support member along the first longitudinal surface of the tube along its length excluding one or both the ends of the tube, supporting by a second support member along the second longitudinal surface of the tube along its length excluding one or both ends of the tube and compressing by a punch on one or both ends of the tube.
  • the application of force by the punch plastically deforms the ends of the tube, increasing thickness of the tube at one or both ends.
  • the process further includes moving the second support member laterally outwards to support the central portion of the inner surface of the tube rigidly.
  • the block used in the process can be wedge shaped.
  • the first support member, the punch and the block are driven by an external hydraulic power source.
  • FIG. l illustrates a pictorial view of an apparatus used for thickening a tube at its brim, in accordance with an embodiment of the present disclosure.
  • FIG.2 illustrates an isometric view of one half of an inner tube holder assembly, in accordance with an embodiment of the present disclosure.
  • FIG.3 illustrates an isometric view of one half of an outer tube assembly, in accordance with an embodiment of present disclosure.
  • FIG.4a and FIG.4b illustrates cross-sectional) views of the tube that is firmly held between first and the second support member for thickening on one or both ends, in accordance with an embodiment of the present disclosure.
  • Embodiments of the present disclosure discloses an apparatus for thickening a tube at its brim, particularly tubes used in components of automobile.
  • the apparatus includes a first support member, which is configured to rigidly support a first longitudinal surface of the tube along its length excluding one or both ends of the tube.
  • the first support member may be driven by a second external power source.
  • the apparatus further includes a second support member, which is configured to rigidly support a second longitudinal surface of the tube along its length excluding the ends of the tube.
  • the apparatus includes a punch, driven by an external power source.
  • the punch may be configured to exert force on either ends of the tube. The application of the force by the punch plastically deforms the ends of the tube, thickening the tube at its brim.
  • the tube may get thickened at one or both ends of the tube.
  • the apparatus also includes a block that may be driven by a first external power source. The block is driven by a first power source, which imparts longitudinal force on the block. The longitudinal force on the block is configured to impart lateral outward movement on the second support member. The movement causes the second support member to move towards the second longitudinal surface, so as to rigidly support the second longitudinal surface of the tube.
  • the first support member includes an outer tube holder and an outer insert. The outer tube holder and the insert are joined through at least one of the mechanical joining and thermal joining. The ends of the outer insert may be chamfered such that the ends of the outer insert define a portion of the die for plastic deformation of the ends of the tube.
  • the second support member also includes an inner tube holder and an inner insert, which are joined through at least one of mechanical joining such as nuts and bolts or thermal joining such as welding.
  • the ends of the inner insert are chamfered, such that they define a portion of die for plastic deformation of the ends of the tube.
  • the inner tube holder corresponds to the shape of the block which may be wedge shaped or any of such shapes.
  • the tube formed using the apparatus comprises a body portion and a brim portion at one or both ends of the body portion.
  • the brim portion at one or both ends of the body portion is such that, the thickness of the brim portion of the tube is greater than the thickness of the body portion of the tube.
  • the body portion of the tube may be of uniform thickness and the portion of the brim on either ends of the body may be having an increased thickness than that of the body portion.
  • the tube is supported by the first support member at the central portion along the first longitudinal surface. Further, the tube is supported by the second support member at the central portion along the second longitudinal surface. The free ends on either sides of the tube are not supported; this portion forms the material to be deformed in the die.
  • a moving block driven by the first external drive exerts a laterally outward force on the second support member to support the central portion of the second longitudinal surface of the tube rigidly.
  • the first support member, the punch and the block may be driven by an external hydraulic power source to perform the required process.
  • FIG.1 is an exemplary embodiment of the present disclosure, illustrating pictorial view of an apparatus (100) used for thickening a tube (101) on one or both ends.
  • the apparatus (100) includes a first support member (102), a second support member (103), a punch (104) and a block (105).
  • the tube (101) is held firmly between the first support member (102) and the second support member (103), on the longitudinal surface of the tube (110 and 111).
  • the first support member (102) is configured to rigidly support the tube (101) on the first longitudinal surface (110).
  • the first longitudinal surface (110) of the tube (101) may be the outer surface of the tube (101).
  • the second support member (103) is configured to rigidly support the tube (101) on the second longitudinal surface (111).
  • the second longitudinal surface (111) of the tube (101) may be the inner surface of the tube (101).
  • the block (105) as shown in the FIG.l is configured to impart a lateral outward movement on the second support member (103).
  • the block (105) is driven by a first external power source in the longitudinal direction, imparting a lateral outward movement on the second support member (103).
  • the lateral outward movement imparted by the block (105) aids the support member (103) to firmly hold the second longitudinal surface (111) of the tube (101).
  • the first support member (102) is driven by a second external power source which provides necessary force to firmly hold the tube (101) between the first and the second support member (102 and 103).
  • the punch (104) is positioned above the block (105) and is configured to a third external power source [not shown].
  • the first external power source drives the block (105) in the longitudinal direction, wherein the block (105) as said above imparts lateral out ward force on the second support member (103).
  • the longitudinal force of the punch (104) driven by the third external power source is imparted over the free ends of the tube (101).
  • the force imparted by the punch (104) acts as compressive force on one or both the ends of the tube (101).
  • the compressive force plastically deforms the either ends of the tube (101) into the portion of the die formed by the first and second support members (102 and 103).
  • the compressive force acting on the ends of the tube (101) deforms the tube (101) into the shape of the die formed by the support members (102 and 103).
  • the die as said above is created by the chamfer provided on the extreme ends of the first and second support member (102 and 103).
  • the first support member (102) includes an outer tube holder (106) and an outer insert (107) as shown in FIG.3 [one half of outer tube holder assembly].
  • the outer tube holder (106) and the outer insert (107) are connected by at least one means, such as but not limiting to mechanical joining and thermal joining.
  • the outer tube holder (106) is a hollow cylindrical component split into two equal halves.
  • the outer tube holder (106) is of uniform cross section i.e., the inner and the outer diameter of the holder (106) is same throughout.
  • the outer insert (107) is a hollow cylindrical part with varying cross section.
  • the outer insert (107) is also split equally into two halves, each half of outer insert is connected to the individual half of the outer holder (106).
  • the outer insert (107) may be designed to define a portion of the die to satisfy the thickening purpose of the tube (101).
  • the outer insert (107) on the extreme ends are chamfered, the chamfered ends define a portion of the die for the plastic deformation of the ends of tube (101).
  • the second support member (103) includes an inner tube holder (108) and inner insert (109) as shown in FIG.2.
  • the inner tube holder (108) is hollow cylindrical component, the cross section varies uniformly from the top to bottom. The uniformly varying cross section may be configured to house the block (105).
  • the inner insert (109) may be designed to define a portion of a die to satisfy the thickening purpose of the tube (101).
  • the inner insert (109) is chamfered at the one or both extreme ends, this chamfered portion defines a portion of the die for the plastic deformation of the ends of the tube (101).
  • the inner insert (109) is also split equally into two halves, each half of inner insert (109) is connected to the individual half of the inner holder (108). Further, both the halves of the two components i.e., the inner tube holder assembly (108 and 109) and the outer tube holder assembly (106 and 107) is assembled together in the apparatus (100).
  • the assembled components i.e., the outer tube holder assembly (106 and 107) and inner tube holder assembly (108and 109) form the first and the second support member (102 and 103) respectively.
  • the chamfered ends of the first support member (102) and second support member (103) defines the complete die portion for plastic deformation of the ends of the tube.
  • the tube (101) is held firmly over the central portion of the first and second longitudinal surfaces (110 and 111).
  • the ends of the tube (101) other than the central portion of the longitudinal surface (110 and 111) are not supported.
  • the ends of the tube (101) on one or both ends may be subjected to compressive force by a punch.
  • the force imparted over the ends of the tube (101) plastically deforms the tube into the shape of the die created by the portions of the first and the second support members (102 and 103).
  • the first support member (102) along with the second support member (103) together hold the tube firmly, supporting only the central portion of the first and second longitudinal surface (110 and 111).
  • the force required to grip the portion of the tube (101) is imparted by the first and second external power source on the first and second support member (102 and 103) respectively.
  • the first power source provides a longitudinal motion to the block (105), that moves into the inner tube holder (108).
  • the block imparts a lateral outward force on the second support member (103), which in turn firmly holds the tube (101) along with support of first support member (102).
  • the first support member (102) is driven by the second external power source for example a hydraulic actuator.
  • the tube (101) is subjected compressive force on one or both ends.
  • the compressive force that is imparted on the ends of the tube (101) plastically deforms the ends of the tube (101).
  • the plastically deformed tube (101) takes the shape of the die that is formed by the portions of first and second support member (102 and 103) as said above.
  • the thickness of the ends of the tube (101) increases after the plastic deformation, as it takes the shape of the die.
  • the first and second external power sources may be any one of but not limiting to a hydraulic drive, pneumatic drive, and the like.
  • the first and second and third external power sources may be used to drive the block (105), the punch (104) and first support member (102).
  • the second support member (103) is driven by the block (105), which imparts a lateral outward force on the same.
  • the block (105) may be anyone of the shape such as but not limiting to a wedge shape.
  • the tube (101) formed using the said apparatus (100) and the said process may have a body portion (200) and a brim portion (201).
  • the tube (101) includes of the body portion (200) and the brim portion (201).
  • the body portion (200) of the tube (101) may be of uniform cross section.
  • the brim portion (201) may be on one or both ends of the body portion (200) of the tube (101).
  • the brim portion (201) is formed by the plastic deformation into the die.
  • the brim (201) has a thickness greater than thickness of the body portion (201) of tube (101).
  • the thickness of the brim portion (201) of the tube is about 20% to 30% greater than the thickness of the body portion (200) according to present disclosure is uniformly varying .
  • FIG.4b it picturizes a completely manufactured tube (101) held between first and second support member (102 and 103) of the apparatus (100).
  • the ends of the tube (101) after deformation takes the shape of the die portion thereby increasing thickness only on the ends.
  • the thickened ends of the tube (101) defines the brim portion (201) as shown in FIG.4b.
  • the body portion (200) of the tube (101) is of uniform cross section.
  • the process of thickening may be carried out on variety of materials such as but not limiting to a mild steel with certain alloy elements.
  • the apparatus (100) can simultaneous thicken the tube (101) on one or both the ends, this ensures lower cycle time which improves the productivity of the apparatus (100).
  • the process has low operation cost over the conventional device due use of less tonnage equipment.
  • the tubes (101) undergo strain hardening during the process, facilitating in increase in strength of the tube (101).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

L'invention concerne un appareil (100) permettant d'épaissir un tube (101) au niveau de son bord (201). L'appareil (100) comprend un premier élément de support (102), qui est conçu pour soutenir de manière rigide une première surface longitudinale (110) du tube (101) sur sa longueur à l'exclusion des deux extrémités du tube (101). Un second élément de support (103) est conçu pour soutenir de manière rigide une seconde surface longitudinale (111) du tube (101) sur sa longueur à l'exclusion des extrémités du tube (101). Un poinçon (104) est entraîné par une source d'alimentation externe, le poinçon (104) étant conçu pour exercer une force sur les deux extrémités du tube (101). L'application d'une force par le poinçon (104) déforme plastiquement les extrémités du tube (101), ce qui permet d'épaissir le tube (101) au niveau de l'une des extrémités ou des deux. L'appareil selon la présente invention est de construction simple et améliore le procédé d'épaississement du tube au niveau de son bord. L'invention concerne également un tube et un procédé d'épaississement de tube.
PCT/IB2020/050046 2019-01-07 2020-01-06 Appareil et procédé permettant d'épaissir un tube au niveau de son bord WO2020144549A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2021539520A JP7416804B2 (ja) 2019-01-07 2020-01-06 管をその縁において厚くするための装置および方法
EP20703286.3A EP3906128A1 (fr) 2019-01-07 2020-01-06 Appareil et procédé permettant d'épaissir un tube au niveau de son bord
BR112021013381-0A BR112021013381A2 (pt) 2019-01-07 2020-01-06 Aparelho e método para espessar um tubo em sua borda
CONC2021/0010324A CO2021010324A2 (es) 2019-01-07 2021-08-05 Un aparato para engrosar un tubo en su borde

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201931000661 2019-01-07
IN201931000661 2019-01-07

Publications (1)

Publication Number Publication Date
WO2020144549A1 true WO2020144549A1 (fr) 2020-07-16

Family

ID=69423354

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/050046 WO2020144549A1 (fr) 2019-01-07 2020-01-06 Appareil et procédé permettant d'épaissir un tube au niveau de son bord

Country Status (5)

Country Link
EP (1) EP3906128A1 (fr)
JP (1) JP7416804B2 (fr)
BR (1) BR112021013381A2 (fr)
CO (1) CO2021010324A2 (fr)
WO (1) WO2020144549A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021191850A1 (fr) * 2020-03-27 2021-09-30 Tata Steel Limited Appareil pour épaissir des portions bord d'une surface interne d'un tube

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2078195A (en) * 1934-12-01 1937-04-20 American Radiator Co Method of manufacturing wrought nonferrous pipe fittings
US3224243A (en) * 1961-06-30 1965-12-21 Earl A Thompson Mfg Company Method of thickening the wall of a tube
DE3216287A1 (de) * 1982-04-26 1983-11-03 Mannesmann AG, 4000 Düsseldorf Rohrendenstauchpresse
JPS60118348A (ja) * 1983-11-30 1985-06-25 Kawasaki Steel Corp ドリルパイプのアプセツト加工方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5184495A (en) * 1991-12-03 1993-02-09 Prideco, Inc. Method of internally and externally upsetting the end of a metal tube
JP2001137997A (ja) 1999-11-18 2001-05-22 Sawai Narejji Laboratory:Kk 型鍛造方法及び型鍛造装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2078195A (en) * 1934-12-01 1937-04-20 American Radiator Co Method of manufacturing wrought nonferrous pipe fittings
US3224243A (en) * 1961-06-30 1965-12-21 Earl A Thompson Mfg Company Method of thickening the wall of a tube
DE3216287A1 (de) * 1982-04-26 1983-11-03 Mannesmann AG, 4000 Düsseldorf Rohrendenstauchpresse
JPS60118348A (ja) * 1983-11-30 1985-06-25 Kawasaki Steel Corp ドリルパイプのアプセツト加工方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021191850A1 (fr) * 2020-03-27 2021-09-30 Tata Steel Limited Appareil pour épaissir des portions bord d'une surface interne d'un tube

Also Published As

Publication number Publication date
BR112021013381A2 (pt) 2021-09-14
JP2022516365A (ja) 2022-02-25
CO2021010324A2 (es) 2021-10-29
JP7416804B2 (ja) 2024-01-17
EP3906128A1 (fr) 2021-11-10

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