US3358488A - Method and apparatus for increasing the ductility of an article during a forming operation - Google Patents

Method and apparatus for increasing the ductility of an article during a forming operation Download PDF

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Publication number
US3358488A
US3358488A US461121A US46112165A US3358488A US 3358488 A US3358488 A US 3358488A US 461121 A US461121 A US 461121A US 46112165 A US46112165 A US 46112165A US 3358488 A US3358488 A US 3358488A
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United States
Prior art keywords
tube
fluid
pressure
ductile
die
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 - Lifetime
Application number
US461121A
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English (en)
Inventor
Jr Francis J Fuchs
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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
Priority to NL136743D priority Critical patent/NL136743C/xx
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US461121A priority patent/US3358488A/en
Priority to NL6607577A priority patent/NL6607577A/xx
Priority to GB24538/66A priority patent/GB1151234A/en
Priority to ES0328032A priority patent/ES328032A1/es
Priority to SE7555/66A priority patent/SE319743B/xx
Priority to DEW41726A priority patent/DE1285434B/de
Priority to FR64112A priority patent/FR1481887A/fr
Priority to BE682049D priority patent/BE682049A/xx
Application granted granted Critical
Publication of US3358488A publication Critical patent/US3358488A/en
Assigned to AT & T TECHNOLOGIES, INC., reassignment AT & T TECHNOLOGIES, INC., CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE JAN. 3,1984 Assignors: WESTERN ELECTRIC COMPANY, INCORPORATED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/10—Corrugating tubes transversely, e.g. helically by applying fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/047—Mould construction

Definitions

  • ABSTRACT OF THE DISCLOSURE The expansion of a tube to an enlarged diameter by applying fluid pressure to the interior and exterior of the tube sufficiently great to render the tube more ductile, and increasing the interior fluid pressure while relieving the exterior fluid pressure, to expand the more ductile tube and maintain the tube more ductile during the expansion.
  • This invention relates to a method and apparatus for increasing the ductility of an article during a forming operation and more particularly to a method of and apparatus for applying hydrostatic forces to the exterior and interior of an article to increase its capacity to deform while maintaining a differential between the forces to deform the article without fracture.
  • tubes made from materials such as copper, brass, bronze, aluminum, mild steel and other low strength materials are expanded by subjecting the interior of the tube to high fluid forces to expand the tube or a portion thereof outwardly to a cylindrical die.
  • the tube diameter can only be increased 30% during the expansion process before the tube material either fractures or unevenly thins out in localized areas.
  • it is extremely diflicult, if not virtually impcxssible, to expand tubes made from hard-to-form materials such as molybdenum, and high strength steels.
  • an object of this invention is to provide a new and improved method of and apparatus for increasing the ductility of an article during a forming operation.
  • An additional object of this invention is to provide a method of and apparatus for applying hydrostatic forces of suflicient magnitude to opposite sides of an article to increase its capacity to deform while maintaining a force differential to eflectuate a deformation of the article without setting up detrimental stress concentrations.
  • An additional object of this invention is to provide a method of and apparatus for applying opposing forces to render a tube ductile and then subjecting the tube to bydraulic and mechanical forces to expand and longitudinally deform the ductile tube while maintaining a uniform wall thickness.
  • Another object of this invention resides in the utilization of an elastic expansion of a forming die to bleed high pressure fluid from a die cavity during a hydraulic forming operation to provide a force difierential which is effective to deform an article positioned within the forming die.
  • the present invention contemplates a method of and apparatus for subjecting an article to opposing hydraulic forces to render the article more ductile, while maintaining a force differential to deform the article. More particularly, in practicing the invention a force of suflicient magnitude is applied to a fluid in the interior of a tube to expand the tube outwardly to pressurize fluid trapped between the tube and the walls of a die whereupon a reactive hydrostatic force is exerted on the exterior of the tube to render the tube ductile. The interior force is then increased to further expand the now ductile tube. The trapped fluid is bled by the expansion of a die housing when the pressure of the trapped fluid on the exterior is above a predetermined pressure needed for continuing the tube expansion. Simultaneously with the expansion of the tube, mechanical longitudinal forces are applied to compress the tube lengthwise to maintain a uniform tube wall thickness.
  • FIG. 1 is a side elevational view of a tubular member to be formed by the method and apparatus of the present invention
  • FIG. 2 is a longitudinal cross-sectional view of the tube shown in FIG. 1 after being formed;
  • FIG. 3 is a front elevational view, partly cut away, of a forming press embodying the principles of the invention showing a die assembly and hydraulic systems for moving upper and lower rams against the die assembly;
  • FIG, 4 is a cross-sectional view of the die assembly illustrating the unformed tube in relation to forming members in the die assembly;
  • FIG. 5 is a view similar to FIG. 4 showing the formed tube in relation to the forming members.
  • FIG. 1 there is shown an article such as a tubular member 10 that may be formed, expanded, bulged or enlarged by the method and apparatus of the present invention.
  • This tubular member is constructed of a material such as copper, brass, aluminum, molybdenum, or steels that will exhibit a substantial increase in ductility when subjected to high hydrostatic pressures.
  • the formed tube 10 has an end section 11, a first radius 12, a first intermediate expanded section 13, a second radius 14, a second intermediate expanded section 15, a third radius 16 and an end section 17 During the forming operation the length of the expanded tube 10 is decreased from its original length but the expanded tube 10 has a uniform tube wall thickness.
  • a copper tube having an inside diameter of 0.376 inch and a length of 8.33 inches is expanded to form a first intermediate expanded section having an inside diameter of 0.505 inch and a second intermediate expanded section having an inside diameter of 0.756 inch.
  • the length :of thecopper tube is decreased from 8.33 inches to 6.25
  • the die assembly 18 is supported by a horizontal support member 21 which is rigidly attached to a bed. 22 of the forming press.
  • the support member 21 has a vertical aperture 23 therethrough in alignment with the vertical axis of the press.
  • a cam 24 is connectedto the upper ram 19.
  • the cam 24 has three distinct contoured surfaces, designated as letters A, B, and C.
  • the cam 24 engages a cam follower 25 which is responsive to the contour of the cam surface when the cam 24 is moved in the vertical direction with the upper ram 19.
  • the cam follower 25 actuates'a pressure controller 26 which in turn controls the hydraulic fluid pressure applied to the lower ram 20.
  • a 4-way valve 27 is .connected in the hydraulic lines between the pressure controller 26 and the lower ram 20 to change the direction of hydraulic fluid flow to the lower ram 20 for raising or lowering the lower ram 20.
  • the movement of the upper ram 19 is responsive to hydraulic fluid pressure regulated by a pressure regulator 28 and a 4-way valve 29.
  • the die assembly 18 comprises a booster or a stationary cylinder 31 that is mounted vertically on the support member 21.
  • the booster 31 has a bore 32 therethrough and a counterbore 33 in the lower end thereof.
  • the upper end of the cylinder 31 has a reduced diameter section 34 forming a stepped abutment 36.
  • a piston 37 is slidably mounted in the counterbore 33 and projects through the aperture 23 of the support member 21 to engage the lower ram 20.
  • a hollow cylindrical first forming member or first die 41 is slidably mounted over the reduced diameter section 34 of the booster 21 to engage the abutment 36.
  • the first forming member 41 has a cylindrical-shaped die recess 42 in the upper end thereof for forming the first radius 12 and the first intermediate expanded section 13 of the tube 10.
  • the first forming member 41 also has an arcuate upper end die surface 43 for forming the second radius 14 on the tube 10.
  • a hollow mandrel 46 for supporting a tube thereon is positioned inside the first forming member 41 and is'sllpported therein by the reduced diameter section 34 of the booster 31.
  • the lower end ofthe mandrel 46 has a flange 47 for engaging one end of the tube 10.
  • the mandrel 46 has a plurality of radial apertures 48 for communicating 'fluid from the interior of said mandrel to the interior of the tube 10.
  • a movable cylindrical die housing 51 has a bore 52 therethrough and a conical counterbore 53 in the upper end thereof forming a shoulder 54 With'thC bore 52.
  • the conical shape of the counterbore facilitate the removal of the formed tube 10.
  • the lower end of the housing 51 is .slidably mounted over the first forming member 41.
  • cylindrical housing 51 will elastically expand radially when subject to sufiicient interior fluid forces above'that necessary to render-ductile'the materialof the'tube 10.
  • a hollow secondforming member frustum-shaped or split die'bushing 56 for forming theexpanded tube section 15 is mounted in the conical counterbore 53 engaging shoulder 54.
  • a frustum-shapedthird forming member 61 is loosely mounted in the counterbore 53.
  • the forming member 61 has an arcuate end surface 62 for forming the third expanded tube radius 16.
  • the third forming member 61 has'a bore 63 extending'therein for slidably receiving and supporting the other end of the mandrel 46.
  • a counterbore 64 is formed in the third forming member 61-forming a shoulder '66 for supporting and engaging the .end 17 of the tube .10.
  • the housing 51 and the second and third forming members '56 and 61 define a second die 67.
  • a frustum-shaped plug 71 is positioned in the upper end of the conical counterbore 53 and extends partly therefrom to enclose the upper nuclei the counterbore 53 and'to limit the movement of the second and .third forming members 56 and 61 in the counterbore 53.
  • deflnega die cavity 72 into which the intermediate tube sections are expanded and formed.
  • the die cavity 72 and the booster 31 and mandrel 46 are filled with forming fluid.
  • a pressure plate 73 is mounted on the plug 71 and is attached to the upper end of the housing 51 bycountersunk bolts 74.
  • the bolts 74 pass through the plate 73 and into the housing 51 to force the pressure plate 73 against the plug 71 to 'slidably move .the plug 71 downwardly into a press fit with the housing 71.
  • the degree of press fit may be varied by the torque applied to the bolts 74.
  • variable degree of press fit of the plug 71 with the housing 51 provides a means of determining the pressure at which the fluid will bleed from the cavity 72 during the forming operation.
  • Radial grooves 76 are formed in the lower surface of the plate 73 for communicating fluid bled'from the cavity 72 to the exterior of the die assembly 18.
  • a tubular blank 10 is placed on the mandrel 46 with end 11 engaging the flange 47. Then the mandrel 46 and tube are inserted into the first forming member 41 so that the flange 47 engages the reduced diameter section 34 of the booster 31. The housing 51'is positioned over the first forming member 41 and then the forming fluid is poured into the housing 51.
  • the second forming member '56 is then inserted into t .e counterbore 53 to engage the shoulder 54,
  • the third forming member 61 is inserted into the counterbore 53 so that the upper end of the mandrel 46 slides into the bore 63 and the end 17 of the tube 10' slides into the counterbore 64 and engages shoulder 66 leaving a gap 77 between the third forming member '61 and the second forming member 56.
  • the plug 71 is then inserted into the counterbore 53.
  • the pressure plate is subsequently positioned on'the plug 71 and screwed to the housing 51 forcing the plug 71 downwardly into a predetermined press fit with the housing 51.
  • the pressure regulator 28. and valve 29 are initially operated to lower the upper ram 19 to engage the pressure plate 73.
  • the cam surface A move into engagement with the cam follower 25 to actuate the pressure controller 26 to increase the pressure of the hydraulic fluid
  • the 4-way valve 27 is then actuated to impress the hydraulic pressure upon the lower ram 20 to move piston 37 upwardly.
  • the piston compresses the fluid in the booster 31 and mandrel 46 which exerts a hydrostatic force through the'apertures '48 to the tube interior to initially expand the intermediate tube sections outwardly subjecting the tube material to tanv gential stresses (hoop-tensile stresses).
  • the tube is initially expanded, the
  • the pressure regulator 28 and valve 29 are again operated to move the upper ram 19 against the pressure plate 73 to telescope the die assembly 18 by slidably-moving the housing 51 on the stationary first forming member '41.
  • third forming member 61 is moved toward the first forming member 41 to compress the die cavity 72 to further increase the fluid pressure in the cavity 72.
  • 66 moves against the tube to longitudinally compress the tube material between tube sections in the cavity 72 to increase the fluid pressure
  • the cam surface V engages the cam follower 25 causing the pressure-controller to provide an increasing hydraulic pressure to the lower ram20 to increase the fluid pressure on the tube interior to further expand the intermediate tube sections in the cavity 72 to increase the fluid'pressure going to the lower .ram 20.
  • the third forming member shoulder V the shoulder 66 and the mandrel flange 47 to maintain a uniform wall thickness during the expanded housing counterbore 53 and through the plate grooves 76 t0 the exterior of the die assembly 18.
  • the bleeding of the fluid from the cavity enables the intermediate tube section to further expand in the cavity 72.
  • the fluid pressure in the cavity 72 exerts a force on the interior of the first forming member 41 to elastically expand the first forming member 41 against the housing 51 forming a seal to prevent fluid bleeding between the housing 51 and the first forming member 41.
  • cam surface C engages the cam follower 25 to accelerate the pressure build-up in the interior of the tube to make sure that the fluid in the cavity 72 is completely bled from the cavity 72 to properly form the tube against the forming members, particularly the second tube radius 13 and the third tube radius 15.
  • the 4-way valve 29 is actuated to raise the upper ram 19 from the pressure plate 73.
  • the 4-Way valve 27 is actuated to lower the ram 29.
  • the pressure plate 73 is now removed from the housing 51 allowing the plug 71 to slide or back out of the press fit with the conical-shaped wall of the counterbore 53.
  • the plug 71, the third forming member 61, the tube 10, the mandrel 46, and the second forming member 56 are removed from the housing 51.
  • the formed bulged tube 10 is then removed from the mandrel 46.
  • a method of enlarging the diameter of a tube While maintaining a uniform Wall thickness which comprises the steps of:
  • a method of expanding a tube in a fluid filled die cavity in which the tube is composed of a material that is rendered more ductile upon subjection to high fluid forces which comprises the steps of:
  • a method of expanding a section of a tube within a fluid filled die having a cavity therein for receiving said section, said tube composed of a material that is rendered more ductile upon subjection to predetermined fluid forces which comprises the steps of:
  • a method of expanding the diameter of a tube While maintaining a uniform wall thickness which comprises the steps of:
  • a method of expanding a section of a tube while 0 maintaining a uniform wall thickness, said tube composed of a material that is rendered more ductile upon subjection to predetermined fluid forces which comprises the steps of:
  • a die for receiving fluid and for supporting said tube in said fluid, means for applying an increasing force to said fluid to pressurize said fluid to exert interior and exterior pressures of suflicient magnitude to render said tube ductile, and means responsive to the increasing pressure on the exterior of said tube for relieving said exterior pressure to render said interior pressure eflective to expand said tube while said tube is maintained in a ductile state.
  • a die for receiving fluid and for supporting said tube in said fluid, means for applying an increasing force to the fluid in the interior of said tube to expand said tube outof a tube while maintaining a wardly to increasingly pressurize the fluid on the exterior of said tube to exert a sufficient reactive fluid force on said exterior to render said tube ductile, and
  • said tube composed of a material that is rendered ductile upon subjection to predetermined fluid forces
  • a hollow die assembly for receiving fluid and for supporting the tube within a cavity between said tube and the outer wall of said die assembly
  • a first die having a die cavity for receiving fluid
  • a mandrel for supporting a tube within said first and second dies, said mandrel having passageways therethrough communicating with the interior of said tube,
  • means responsive to said relative movement of said dies for increasing the pressure on the fluid passing to said mandrel passageway to further increase the pressure differential and continue the tube expansion into engagement with the walls of said first and second dies.
  • a hollow die housing slidably mounted on said cylindical die and having a conical recess
  • a hollow cylindrical first forming member for receiving fluid and for supporting one end of said tube
  • a hollow cylindrical housing slidably mounted over said first forming member, said housing having an internal recess therein,
  • means including an adjustable pressure controller for applying compressed fluid to the interior of said tube,
  • a movable cylindrical die housing through and a conical counterbore in one end thereof forming a shoulder with said bore
  • a stationary cylindrical first forming member for receiving fluid and mounted in the other end of said die housing for enclosing said other end of said housing and engaging one end of said tube
  • a frustum-shaped third forming member in juxtaposition to said second forming member in said housing counterbore for engaging the other end of said tube
  • means including an adjustable pressure controller for applying compressed fluid to the interior of said tube,
  • a high pressure forming apparatus for expanding a tube while maintaining a uniform tube wall thickness, said tube composed of a material that is rendered ductile upon subjection to predetermined fluid forces;
  • a hollow mandrel having a flange engaging said reduced cylinder end for supporting said tube, said mandrel having a plurality of radial apertures for communicating fluid from the interior of said mandrel to the interior of said tube,
  • a hollow cylindrical first forming member having one having a bore thereend surrounding said cylinder recess and said mandrel flange and engaging said cylinder abutment
  • an elastically expandable cylindrical housing having a bore therethrough which is slidably mounted on said first forming member, said housing having a conical counterbore to form a shoulder with said housing bore,
  • a frustum-shaped third forming member mounted in said conical counterbore, said third forming member having a stepped axial cavity therein for supporting and engaging the other end of said tube,
  • a hydraulic pressure control means responsive to the contour of said cam for controlling the pressure of fluid to be applied to move said piston in said stationary cylinder
  • valving means for rendering the hydraulic pressure control means effective to move said piston in said stationary cylinder to pressurized fluid to be received in said cylinder and said mandrel to exert a suflicient hydrostatic force on the interior of said tube to expand said tube outwardly to pressurize fluid to be received between the tube exterior and the first, secnd, and third forming members to exert a hydrostatic force on the exterior of said tube to render said tube ductile, and
  • a method of expanding a hollow tube to an enlarged diameter comprising:
  • a method of expanding a hollow tube to an enlarged diameter comprising:
  • a method of expanding a hollow tube to an enlarged diameter comprising:

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
US461121A 1965-06-03 1965-06-03 Method and apparatus for increasing the ductility of an article during a forming operation Expired - Lifetime US3358488A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
NL136743D NL136743C (es) 1965-06-03
US461121A US3358488A (en) 1965-06-03 1965-06-03 Method and apparatus for increasing the ductility of an article during a forming operation
NL6607577A NL6607577A (es) 1965-06-03 1966-06-01
ES0328032A ES328032A1 (es) 1965-06-03 1966-06-02 Metodo y aparato para aumentar la ductilidad de un articulo en un proceso de embuticion.
GB24538/66A GB1151234A (en) 1965-06-03 1966-06-02 Method and apparatus for Expanding Tubular Articles
SE7555/66A SE319743B (es) 1965-06-03 1966-06-02
DEW41726A DE1285434B (de) 1965-06-03 1966-06-03 Verfahren und Einrichtung zum Aufweiten eines Rohres
FR64112A FR1481887A (fr) 1965-06-03 1966-06-03 Procédé et appareil pour agrandir le diamètre d'une partie au moins d'un tube
BE682049D BE682049A (es) 1965-06-03 1966-06-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US461121A US3358488A (en) 1965-06-03 1965-06-03 Method and apparatus for increasing the ductility of an article during a forming operation

Publications (1)

Publication Number Publication Date
US3358488A true US3358488A (en) 1967-12-19

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US461121A Expired - Lifetime US3358488A (en) 1965-06-03 1965-06-03 Method and apparatus for increasing the ductility of an article during a forming operation

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US (1) US3358488A (es)
BE (1) BE682049A (es)
DE (1) DE1285434B (es)
ES (1) ES328032A1 (es)
GB (1) GB1151234A (es)
NL (1) NL136743C (es)
SE (1) SE319743B (es)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415089A (en) * 1966-12-12 1968-12-10 Gen Motors Corp Hydrostatic continuous forming mill
US3630056A (en) * 1968-07-04 1971-12-28 Pierre Cuq Method and assembly for the production by hydroforming of parts of large size, especially in length
US3654785A (en) * 1969-01-29 1972-04-11 Agency Ind Science Techn Liquid pressure bulge forming apparatus
US4467630A (en) * 1981-12-17 1984-08-28 Haskel, Incorporated Hydraulic swaging seal construction
FR2654957A1 (fr) * 1989-11-30 1991-05-31 Cuq Georges Procede et dispositif pour calibrer une piece realisee par une installation d'hydroflambage.
US5203190A (en) * 1990-05-30 1993-04-20 Sivco, Inc. Method and apparatus for making a hydrocyclone separation chamber
US5802899A (en) * 1993-03-11 1998-09-08 Friedrich Klaas Method for internal high-pressure deforming of hollow offset shafts made of cold-deformable metal
CN102025060A (zh) * 2009-09-17 2011-04-20 泰科电子Amp有限责任公司 用于高电流插头连接器的电接触元件及制造方法
CN104308473A (zh) * 2014-09-25 2015-01-28 徐州徐工液压件有限公司 局部强化全纤维液压缸缸筒的加工方法
US11267189B2 (en) 2016-05-26 2022-03-08 Dow Global Technologies, Llc Mandrel and support assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487668A (en) * 1966-07-12 1970-01-06 Western Electric Co Shaping and forming articles
CN108500112A (zh) * 2017-02-28 2018-09-07 中国商用飞机有限责任公司 一种柔性上模的钣金加工方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US633430A (en) * 1896-10-29 1899-09-19 Charles Thomas Crowden Apparatus for forming tubular joints.
US650755A (en) * 1900-05-29 Carl Huber Apparatus for shaping metal objects by means of fluid-pressure.
US2038304A (en) * 1934-05-04 1936-04-21 Alexander J Middler Metal blowing process
CA476793A (en) * 1951-09-11 W. Bridgman Percy Art of extrusion
US2902962A (en) * 1955-01-07 1959-09-08 American Radiator & Standard Machines for shaping hollow tubular objects
US3072085A (en) * 1959-05-08 1963-01-08 American Radiator & Standard Method and apparatus for producing hollow articles
US3229488A (en) * 1962-10-18 1966-01-18 American Radiator & Standard Apparatus for shaping hollow objects

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE133493C (es) * 1900-02-14
CH295158A (de) * 1950-09-18 1953-12-15 Ici Ltd Verfahren und Vorrichtung zur Herstellung von Rohrfittingen.
CH296412A (de) * 1951-12-04 1954-02-15 Ewald Kranenberg Heinrich Verfahren und Vorrichtung zur Herstellung von Hohlkörpern aus Blech unter hydraulischem Druck.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US650755A (en) * 1900-05-29 Carl Huber Apparatus for shaping metal objects by means of fluid-pressure.
CA476793A (en) * 1951-09-11 W. Bridgman Percy Art of extrusion
US633430A (en) * 1896-10-29 1899-09-19 Charles Thomas Crowden Apparatus for forming tubular joints.
US2038304A (en) * 1934-05-04 1936-04-21 Alexander J Middler Metal blowing process
US2902962A (en) * 1955-01-07 1959-09-08 American Radiator & Standard Machines for shaping hollow tubular objects
US3072085A (en) * 1959-05-08 1963-01-08 American Radiator & Standard Method and apparatus for producing hollow articles
US3229488A (en) * 1962-10-18 1966-01-18 American Radiator & Standard Apparatus for shaping hollow objects

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415089A (en) * 1966-12-12 1968-12-10 Gen Motors Corp Hydrostatic continuous forming mill
US3630056A (en) * 1968-07-04 1971-12-28 Pierre Cuq Method and assembly for the production by hydroforming of parts of large size, especially in length
US3654785A (en) * 1969-01-29 1972-04-11 Agency Ind Science Techn Liquid pressure bulge forming apparatus
US4467630A (en) * 1981-12-17 1984-08-28 Haskel, Incorporated Hydraulic swaging seal construction
FR2654957A1 (fr) * 1989-11-30 1991-05-31 Cuq Georges Procede et dispositif pour calibrer une piece realisee par une installation d'hydroflambage.
US5203190A (en) * 1990-05-30 1993-04-20 Sivco, Inc. Method and apparatus for making a hydrocyclone separation chamber
US5802899A (en) * 1993-03-11 1998-09-08 Friedrich Klaas Method for internal high-pressure deforming of hollow offset shafts made of cold-deformable metal
CN102025060A (zh) * 2009-09-17 2011-04-20 泰科电子Amp有限责任公司 用于高电流插头连接器的电接触元件及制造方法
CN102025060B (zh) * 2009-09-17 2015-08-05 泰科电子Amp有限责任公司 用于高电流插头连接器的电接触元件及制造方法
CN104308473A (zh) * 2014-09-25 2015-01-28 徐州徐工液压件有限公司 局部强化全纤维液压缸缸筒的加工方法
CN104308473B (zh) * 2014-09-25 2016-05-25 徐州徐工液压件有限公司 局部强化全纤维液压缸缸筒的加工方法
US11267189B2 (en) 2016-05-26 2022-03-08 Dow Global Technologies, Llc Mandrel and support assembly

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ES328032A1 (es) 1967-04-01
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GB1151234A (en) 1969-05-07
BE682049A (es) 1966-11-14

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