US3599471A - Explosive capping for hex dies - Google Patents

Explosive capping for hex dies Download PDF

Info

Publication number
US3599471A
US3599471A US878719A US3599471DA US3599471A US 3599471 A US3599471 A US 3599471A US 878719 A US878719 A US 878719A US 3599471D A US3599471D A US 3599471DA US 3599471 A US3599471 A US 3599471A
Authority
US
United States
Prior art keywords
rods
die
section
capping
explosive
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
US878719A
Other languages
English (en)
Inventor
Foster E Whitacre
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.)
Ford Motor Co
Original Assignee
Ford Motor Co
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 Ford Motor Co filed Critical Ford Motor Co
Application granted granted Critical
Publication of US3599471A publication Critical patent/US3599471A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools

Definitions

  • Harrington ABSTRACT An incremental die construction comprising individual rod increments that are premachined and arranged in registry, one end of each rod forming an increment of a precalibrated surface contour, and a metal cap bonded to the ends of the rods over which sheet metal may be drawn during metal-forming operations.
  • My invention is an improvement in the invention disclosed in copending application Ser. No. 749,685 filed Aug. 2, 1968, which is assigned to the assignee of my invention.
  • This copending application discloses an incremental die comprising hexagonal rods which are precut to length using a numerically controlled cutoff machine. The ends of each rod form a segment of a predetermined surface contour so that the individual rods may be bonded together to form a solid die section.
  • the upper die section and the lower die section can be formed simultaneously since the numerically controlled rodcutting steps produce registering elements of the upper and lower die sections, the matching ends of the two rods forming increments of the rough machined die surface equivalent for the respective die sections.
  • a homogenous die surface for a hexagonal rod assembly can be made and the rods themselves may be tied together to form a unitary die section that is structurally rigid.
  • a die section such as that described in the copending application may be provided with a capping of metal which may be finish machined to provide a homogenous, continuous Contact surface for the sheet metal material to be drawn by the die. This is done by an explosive capping procedure which will be described.
  • the metal capping applied to the die rod material produces a permanent bond that ties the rods together into a welded assembly.
  • DIe surfaces of wear resistant materials can be used in my invention while retaining the base metal for structural rigidity.
  • the rods of the die section need not be brazed together. It is possible, for example, to use instead a low-temperature epoxy adhesion process rather than a high-temperature brazing process. This avoids distortion of the die surface.
  • FIG. 1 shows in plan view an incremental die section without the cap applied thereto.
  • FIG. 2 is a cross-sectional view taken along the plane of section line 22 ofFlG. 1.
  • FIG. 3 is a cross-sectional view taken along the plane ofsection line 3-3 ofFlG. 1.
  • FIG. 4 is a die comprising incremental sections, one section being shown in registry with the other. The capping for the upper die section is illustrated in FIG. 4.
  • FIG. 5 is a view of the rod ends of the upper die section of FIG. 4 as seen from the plane of section line 5-5 of FIG. 4.
  • FIG. 6 is a cross sectional view taken along the plane of section line 6-6 of FIG. 5.
  • FIG. 7 shows an incremental die section together with a metal cap, as it would appear prior to the explosive capping operation.
  • FIGS. 1,2 and 3 show one of a pair of die sections for forming sheet metal.
  • the die section has a cooperating die surface in the form of a cavity.
  • the cooperating die section would have a convex die surface that would register with the concavity of the die section shown in these figures.
  • Numeral I0 designates in FIGS. 1, 2 and 3 a die housing which may be in the form ofa box.
  • the housing may be of any shape desired, although in the FIG. 2 embodiment it is a square.
  • hexagonal rods 12 Situated in the housing in close registry are hexagonal rods 12.
  • Each rod is cut to form an upper surface such as that shown at 114, which generally cooperates with an adjacent end surface of the adjacent hexagonal rod.
  • the surfaces directly adjacent surface 17 are designated by reference characters 16, I8, 20 and 22 in FIG. 3.
  • the height of each rod, as well as the angularity of the end surface, are chosen so that each individual surface forms an increment of a larger surface having a contour that approximates the contour of the desired finished dies surface.
  • each individual rod is formed with a segment of a ridge 24 so that when the individual rod segments are joined side by side, they define the peripheral ridge 24!.
  • This ridge registers with a peripheral groove in the registering die section so that the dies sections are piloted one with respect to the other into periphery registry.
  • each incremental end surface of each rod 112 registers with a cooperating end surface of a companion rod for the other die section.
  • the angle of the surface for any given rod 12 and the die section of FIG. 3, for example, would have an identical angle on the cooperating end surface of the companion rod of the other die section. A clearance space between these two end surfaces accommodates the metal thickness of the sheet metal formed by the dies.
  • FIG. 4 is shown in cross section a pair of die sections, each having a die surface that registers with the die surface of a companion section.
  • the space between the companion end surfaces of the upper and lower rod segments of the upper die section 27 and the lower die section 29 is occupied by the sheet metal 25.
  • Shown also in FIG. 4 is a metal cap 40 which envelops the end of the rods of the die section 27.
  • This metal cap 40 is finish machined by a machining process employing a numerically control, multiple axis milling machine.
  • each end of each hexagonal rod forms an end surface that is tangent to the die surface contour at a point that falls on the center line of the rod itself, as illustrated in FIG. 6.
  • the individual rods 12 include surfaces 26, 28 and 30 which form rough machined surface equivalents for the die surface contour shown at 32. Points of'tangency for the surfaces 26, 28 and 30 coincide with the points of intersection of the center lines 34, 36 and 38 for the rods I2 with the finish die surface 32.
  • the capping 40 for the die section is machined to form a contour which is parallel to the contour 32. It is not necessary to remove large quantities of metal during the machining operation. No rough machining is required.
  • the machining operation can be made by a suitable multiple axis milling machine controlled by a numerical control director. This is described in copending application Ser. No. 577,997, now Pat. No. 3,548, I 73 filed Sept. 8, 1966, which is assigned to the assignee of this invention. Reference may be had to that application for the purpose of supplemenung this disclosure.
  • the hexxgnnal assembly for the die section is held together by a suitable adhesive.
  • the adhesive is cured until it is set.
  • the surface defined by the ends of the rods then is rough ground to provide a uniform surface that is not necessarily accurate. This surface can be cleaned by abrasive blasting.
  • a preformed and cleaned blank of metal material approximately oiiequarter to threeeighths inch thick, is fixed in place on the rough ground and cleaned end surfaces of the die section. If desired, this metal blank can be located either by tack welding or by some other suitable retaining means.
  • a layer of sheet explosive then is attached to the top of the preformed metal blank and a suitable primer cord is attached along one end. This arrangement is illustrated in FIG.
  • a homogenous bonding zone is established between the capping and the ends of the rods.
  • the velocity that the burning edge develops during the burning operation must be proper for the particular metal that is used.
  • the choice of metal is determined by the physical characteristics of the dies that are desired.
  • the capping establishes a work surface for the die, and it also secures together the hexagonal rods in a rigid assembly which eliminates the need for brazing or welding of the rods that form the die sections.
  • a machined die section comprising a plurality of incremental rods with a cross section in the form of a regular polygon, said rods being situated in registry and bonded together to define an integrated assembly, corresponding ends of said rods forming discrete two dimensional surfaces, said rod ends being contiguous to form a predetermined surface definition, and an explosive capping formed on said end surfaces whereby said rods are held together in a rigid assembly,
  • said explosive capping forming a surface layer for said die section which may be finish machined to a predetermined surface contour.
  • a pair of die sections each section comprising a plurality of incremental rods with across section in the form of a regular polygon, said rods being situated in registry, corresponding ends of said rods forming discrete two dimensional surfaces, the end surface of one assembly being contiguous to define a predetermined die surface contour, the end surface of the rods of the complementary assembly being contiguous to define another predetermined surface contour, and concave portions of one surface contour registering with convex portions of the other surface contour, at least one of said die sections having an explosive capping formed thereon, said capping overlying the rod ends of said one die section and forming a bond therewith, said capping providing metal that may be finish machined to a predetermined surface contour of which the contiguous end surfaces of said rods form an approximation, said capping holding together said rods in an integral rigid assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Laminated Bodies (AREA)
US878719A 1969-11-21 1969-11-21 Explosive capping for hex dies Expired - Lifetime US3599471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87871969A 1969-11-21 1969-11-21

Publications (1)

Publication Number Publication Date
US3599471A true US3599471A (en) 1971-08-17

Family

ID=25372673

Family Applications (1)

Application Number Title Priority Date Filing Date
US878719A Expired - Lifetime US3599471A (en) 1969-11-21 1969-11-21 Explosive capping for hex dies

Country Status (4)

Country Link
US (1) US3599471A (enExample)
CA (1) CA951972A (enExample)
DE (1) DE2052372A1 (enExample)
GB (1) GB1290246A (enExample)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955524A (en) * 1989-08-24 1990-09-11 General Motors Corporation Extrusion die construction and its method of manufacture
US5013232A (en) * 1989-08-24 1991-05-07 General Motors Corporation Extrusion die construction
US5330343A (en) * 1992-11-10 1994-07-19 Autocontrole Inc. Variable-shape mold
US5513972A (en) * 1993-01-27 1996-05-07 General Motors Corporation Surface generating device suitable for generating a die, mold or fixture surface
WO1999029449A1 (fr) * 1997-01-29 1999-06-17 Tseng Shao Chien Matrice de frappe a froid reutilisable
US20050279152A1 (en) * 2004-06-21 2005-12-22 Karl-Heinz Fueller Deforming tool and process for manufacturing thereof
US20140306585A1 (en) * 2013-04-16 2014-10-16 Htc Corporation Molded casing, mold assembly and forming method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882627A (ja) * 1981-11-07 1983-05-18 Inoue Japax Res Inc 型の製作方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US881912A (en) * 1907-04-15 1908-03-17 Frank C Emrick Die and method of making same.
US1591572A (en) * 1925-02-05 1926-07-06 Jonathan C Stimson Process and apparatus for making central triple reflectors
US1826873A (en) * 1928-02-16 1931-10-13 Maschf Augsburg Nuernberg Ag Diesel locomotive having power cylinders connected to the driving mechanism
US2332360A (en) * 1943-02-09 1943-10-19 Crompton & Knowles Loom Works Die and method of making same
US2691905A (en) * 1949-12-19 1954-10-19 Gen Motors Corp Apparatus for making dies
US3137937A (en) * 1960-10-26 1964-06-23 Du Pont Explosive bonding
US3409975A (en) * 1966-08-23 1968-11-12 Air Force Usa Welding by high energy stress front
US3503110A (en) * 1965-09-14 1970-03-31 Yorkshire Imperial Metals Ltd Securing tubes into tube plates

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US881912A (en) * 1907-04-15 1908-03-17 Frank C Emrick Die and method of making same.
US1591572A (en) * 1925-02-05 1926-07-06 Jonathan C Stimson Process and apparatus for making central triple reflectors
US1826873A (en) * 1928-02-16 1931-10-13 Maschf Augsburg Nuernberg Ag Diesel locomotive having power cylinders connected to the driving mechanism
US2332360A (en) * 1943-02-09 1943-10-19 Crompton & Knowles Loom Works Die and method of making same
US2691905A (en) * 1949-12-19 1954-10-19 Gen Motors Corp Apparatus for making dies
US3137937A (en) * 1960-10-26 1964-06-23 Du Pont Explosive bonding
US3503110A (en) * 1965-09-14 1970-03-31 Yorkshire Imperial Metals Ltd Securing tubes into tube plates
US3409975A (en) * 1966-08-23 1968-11-12 Air Force Usa Welding by high energy stress front

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955524A (en) * 1989-08-24 1990-09-11 General Motors Corporation Extrusion die construction and its method of manufacture
US5013232A (en) * 1989-08-24 1991-05-07 General Motors Corporation Extrusion die construction
US5330343A (en) * 1992-11-10 1994-07-19 Autocontrole Inc. Variable-shape mold
US5513972A (en) * 1993-01-27 1996-05-07 General Motors Corporation Surface generating device suitable for generating a die, mold or fixture surface
US5738345A (en) * 1993-01-27 1998-04-14 General Motors Corporation Device for generating a fixture
WO1999029449A1 (fr) * 1997-01-29 1999-06-17 Tseng Shao Chien Matrice de frappe a froid reutilisable
US20050279152A1 (en) * 2004-06-21 2005-12-22 Karl-Heinz Fueller Deforming tool and process for manufacturing thereof
US20140306585A1 (en) * 2013-04-16 2014-10-16 Htc Corporation Molded casing, mold assembly and forming method
CN104113997A (zh) * 2013-04-16 2014-10-22 宏达国际电子股份有限公司 造型壳体、模具总成与成型方法
US9346198B2 (en) * 2013-04-16 2016-05-24 Htc Corporation Molded casing, mold assembly and forming method
TWI574856B (zh) * 2013-04-16 2017-03-21 宏達國際電子股份有限公司 造型殼體、模具總成與成型方法

Also Published As

Publication number Publication date
CA951972A (en) 1974-07-30
GB1290246A (enExample) 1972-09-20
DE2052372A1 (de) 1971-06-09

Similar Documents

Publication Publication Date Title
US3599471A (en) Explosive capping for hex dies
US4287749A (en) Tapered extrusion die and method of forming the same
US4177665A (en) Cold flow forming
US2441580A (en) Method of forming screw threads
DE2800331C2 (enExample)
JPS5594740A (en) Bonding method for two metallic parts
US2964838A (en) Method of pressing bevel gear wheels and the like from steel
US3675459A (en) Method for manufacturing bevel gears
US4419877A (en) Method of manufacturing a cylindrical sleeve provided with internal grooves, and tool for carrying out this method
US3722257A (en) Incremental construction of three-dimensional objects having premachined rod elements and method for forming the same
EP0014480A1 (en) Contoured stamping die and method of manufacture thereof
US5870923A (en) Forging method
US2304185A (en) Broach
US4527729A (en) Die forming method
US3625568A (en) Method of making disk wheel
US3605528A (en) Incremental construction of three-dimensional objects having premachined rod elements and method for forming the same
US3691804A (en) Cold extruded article and method of making the same
US2067269A (en) Method of making tractor shoes and similar articles
US2205132A (en) Propeller and method of making same
DE10063040C2 (de) Verfahren zur Herstellung von in der Dicke bereichsweise variierenden Platinen
US3158119A (en) Metal working
DE4446193A1 (de) Verfahren zur Herstellung eines Laufrades
SU776735A1 (ru) Инструмент дл прот жки заготовок
EP0163769A3 (en) A method and a machine for producing a metallic ring with specially contoured surfaces from a ring-shaped blank of selected cross-section
US1572343A (en) Die-rolled blank and method and apparatus for making the same