GB878178A - Metal forming - Google Patents

Metal forming

Info

Publication number
GB878178A
GB878178A GB4085259A GB4085259A GB878178A GB 878178 A GB878178 A GB 878178A GB 4085259 A GB4085259 A GB 4085259A GB 4085259 A GB4085259 A GB 4085259A GB 878178 A GB878178 A GB 878178A
Authority
GB
United Kingdom
Prior art keywords
gel
tube
die
explosive
die holder
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
Application number
GB4085259A
Inventor
Fred Thomas Callahan
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.)
Olin Corp
Original Assignee
Olin Corp
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 Olin Corp filed Critical Olin Corp
Priority to GB4085259A priority Critical patent/GB878178A/en
Publication of GB878178A publication Critical patent/GB878178A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02Shaping 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
    • B21D26/06Shaping 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 by shock waves
    • B21D26/08Shaping 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 by shock waves generated by explosives, e.g. chemical explosives

Abstract

878,178. Making corrugated tubes; stamping; altering physical properties. OLIN MATHIESON CHEMICAL CORPORATION. Dec. 1, 1959, No. 40852/59. Classes 83 (2) and 83 (4). A method of working metals with explosives is characterized by transmitting the force of an explosive charge to a metal through a gel. In an embodiment a metal tube 27 is filled with a gelatinous solution and permitted to stand until its phase changes to a gel 5. The gelfilled tube is placed on a split die 11 mounted within a die holder 13. An explosive charge 22 and a detonator 23 is placed in a bore 21 in the die holder and the die holder is placed within clamping means (not shown). When the charge is ignited the explosive force is transmitted through the gel 5 to expand the tube into the die cavities 12 and 17. Discs 16 and 19 on the die holder act as bleeding means to relieve the contained pressure within the assembly. A reversible gel may be used so that it may be recovered and re-used many times. In another embodiment the explosive is suspended in the gel as shown in Fig. 2. Resilient cup-shaped obturating seals 34 and 35 (Fig. 7) are preferably placed in the ends of the tube to prevent loss of gel. In a further embodiment a metal sheet 51 is placed against a cupping die 49 mounted on a holder 41 containing a chamber 42, and a breech mechanism 47 for receiving a cartridge 48. A gelatinous solution is poured into the chamber 42 and allowed to gel. Alternatively, the gel may be preformed to the shape of the chamber and handled as a solid. In a modification, the explosive charge is embedded in the gel. A tube having complex curvatures may be formed with bulged portions by filling the tube with a gel as hitherto, and placing the tube in a die 66 (Fig. 11) having cavities 61 and a breech mechanism 64. In another embodiment the tube is formed against a mandrel 68 or 74 (Figs. 12 and 13) having a screw-thread or ribbed configuration. The mandrel is formed of a material having a lower melting point than the tube, e.g. woods metal or aluminium, to enable the mandrel to be melted from within the tube after the forming operation. A door knob is formed by the method of the invention using a closed ended tube 79 filled with gel and placed between dies 83 (Fig. 14). Similarly, a tumbler-shaped container is formed from a gel-filled tube 79, the open end of which contains a resilient obturating sealing member 82 (Fig. 16). In an example, the explosive powder is prepared by impregnating 80% by weight of nitrocellulose with 20% by weight of nitroglycerine. The gelatinous solution is prepared by mixing 20% by weight of gelatin derived from animal protein in water with agitation. Sodium benzoate and an anti-foaming agent are added to the colloidal solution.
GB4085259A 1959-12-01 1959-12-01 Metal forming Expired GB878178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4085259A GB878178A (en) 1959-12-01 1959-12-01 Metal forming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4085259A GB878178A (en) 1959-12-01 1959-12-01 Metal forming

Publications (1)

Publication Number Publication Date
GB878178A true GB878178A (en) 1961-09-27

Family

ID=10416931

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4085259A Expired GB878178A (en) 1959-12-01 1959-12-01 Metal forming

Country Status (1)

Country Link
GB (1) GB878178A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498762A (en) * 1946-07-13 1950-02-28 United Shoe Machinery Corp Sole fitting machine
WO2008080502A1 (en) * 2006-12-20 2008-07-10 Cosma Engineering Europe Ag Workpiece and method for explosion forming
US20100326158A1 (en) * 2008-01-31 2010-12-30 Andreas Stranz Device for explosive forming
US8047036B2 (en) 2005-06-03 2011-11-01 Magna International Inc. Device and method for explosion forming
CN102489582A (en) * 2011-11-18 2012-06-13 吉林大学 Flexible forming method of variable cross-section special-shaped piece with closed cavities
US8250892B2 (en) 2006-12-01 2012-08-28 Cosma Engineering Europe Ag Closure device for explosion forming
US8252210B2 (en) 2006-08-11 2012-08-28 Cosma Engineering Europe Ag Method and device for explosion forming
US8443641B2 (en) 2007-02-14 2013-05-21 Cosma Engineering Europe Ag Explosion forming system
US8650921B2 (en) 2006-08-11 2014-02-18 Cosma Engineering Europe Ag Method and device for explosion forming
US8875553B2 (en) 2007-02-14 2014-11-04 Cosma Engineering Europe Ag Method and mould arrangement for explosion forming
US8939743B2 (en) 2007-08-02 2015-01-27 Cosma Engineering Europe Ag Device for supplying a fluid for explosion forming
US20150240374A1 (en) * 2012-12-07 2015-08-27 Apple Inc. Electroformed housings and methods for making the same
US9393606B2 (en) 2007-05-22 2016-07-19 Cosma Engineering Europe Ag Ignition device for explosive forming
CN108927439A (en) * 2018-06-21 2018-12-04 江西嘉陶无机材料有限公司 A kind of material billow forming processing method based on chemical reaction
WO2022240605A1 (en) * 2021-05-14 2022-11-17 Savannah River Nuclear Solutions, Llc Tooling assembly and method for explosively forming features in a thin-walled cylinder

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498762A (en) * 1946-07-13 1950-02-28 United Shoe Machinery Corp Sole fitting machine
US8047036B2 (en) 2005-06-03 2011-11-01 Magna International Inc. Device and method for explosion forming
US8650921B2 (en) 2006-08-11 2014-02-18 Cosma Engineering Europe Ag Method and device for explosion forming
US8252210B2 (en) 2006-08-11 2012-08-28 Cosma Engineering Europe Ag Method and device for explosion forming
US8250892B2 (en) 2006-12-01 2012-08-28 Cosma Engineering Europe Ag Closure device for explosion forming
US8322175B2 (en) 2006-12-20 2012-12-04 Cosma Engineering Europe Ag Workpiece and method for explosion forming
WO2008080502A1 (en) * 2006-12-20 2008-07-10 Cosma Engineering Europe Ag Workpiece and method for explosion forming
US9737922B2 (en) 2007-02-14 2017-08-22 Magna International Inc. Explosion forming system
US8875553B2 (en) 2007-02-14 2014-11-04 Cosma Engineering Europe Ag Method and mould arrangement for explosion forming
US8443641B2 (en) 2007-02-14 2013-05-21 Cosma Engineering Europe Ag Explosion forming system
US9393606B2 (en) 2007-05-22 2016-07-19 Cosma Engineering Europe Ag Ignition device for explosive forming
US8939743B2 (en) 2007-08-02 2015-01-27 Cosma Engineering Europe Ag Device for supplying a fluid for explosion forming
US8713982B2 (en) * 2008-01-31 2014-05-06 Magna International Inc. Device for explosive forming
US20100326158A1 (en) * 2008-01-31 2010-12-30 Andreas Stranz Device for explosive forming
CN102489582A (en) * 2011-11-18 2012-06-13 吉林大学 Flexible forming method of variable cross-section special-shaped piece with closed cavities
US20150240374A1 (en) * 2012-12-07 2015-08-27 Apple Inc. Electroformed housings and methods for making the same
US10196750B2 (en) * 2012-12-07 2019-02-05 Apple Inc. Electroformed housings and methods for making the same
CN108927439A (en) * 2018-06-21 2018-12-04 江西嘉陶无机材料有限公司 A kind of material billow forming processing method based on chemical reaction
CN108927439B (en) * 2018-06-21 2019-09-27 江西嘉陶无机材料有限公司 A kind of material billow forming processing method based on chemical reaction
WO2022240605A1 (en) * 2021-05-14 2022-11-17 Savannah River Nuclear Solutions, Llc Tooling assembly and method for explosively forming features in a thin-walled cylinder
US11628485B2 (en) 2021-05-14 2023-04-18 Battelle Savannah River Alliance, LLC. Tooling assembly and method for explosively forming features in a thin-walled cylinder

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