US3719065A - Variable orifice die and control therefor - Google Patents

Variable orifice die and control therefor Download PDF

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Publication number
US3719065A
US3719065A US00122319A US3719065DA US3719065A US 3719065 A US3719065 A US 3719065A US 00122319 A US00122319 A US 00122319A US 3719065D A US3719065D A US 3719065DA US 3719065 A US3719065 A US 3719065A
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United States
Prior art keywords
die
segments
chamber
outer periphery
diameter
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Expired - Lifetime
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US00122319A
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English (en)
Inventor
F Fuchs
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AT&T Corp
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Western Electric Co Inc
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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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    • 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
    • B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
    • 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
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/08—Dies or mandrels with section variable during extruding, e.g. for making tapered work; Controlling variation

Definitions

  • This invention relates generally to the deformation of rod in a die to form a wire product. More specifically, this invention relates to deformation, by drawing or extrusion, of rod in a fluid-pressure controlled variable orifice die, with sensing means monitoring the diameter of the wire product and increasing the fluid pressure controlling the variable orifice die to constrict the die orifice to compensate for die wear.
  • the draw dies are provided with annular diamond inserts which engage the rod and reduce the diameter thereof. Notwithstanding the inherent hardness of diamond, the wear of the diamond dies is so great that the diamond inserts may require replacement as often as every eight hours, in order to maintain the diameters of the orifices of the die inserts within tolerable limits.
  • One of the objects of this invention is to provide improved apparatus and method for the deformation of rod to produce wire.
  • Another of the objects of this invention is to provide improved apparatus and method for constricting the diameter of the orifice of a rod deforming die in response to increase in the diameter of the wire product caused by die wear.
  • FIG. 1 represents a view showing the rod passing through the die of the present invention, the die being shown in medial longitudinal section, the sensing device monitoring the diameter of the wire product and the transducer operatively interposed between the sensing device and the die being indicated diagrammatically;
  • FIG. 2 represents a sectional view of the die taken along the line 2'2 of FIG. 1;
  • FIG. 3 represents a sectional view of the die, similar to FIG. 2, and shows a modification of the sensing device
  • FIG. 4 represents a vertical view of the die, generally similar to FIG. 3, and shows a further modification of the sensing device.
  • fluid-pressure controlled variable orifice die assembly 1 is shown as deforming rod 2 to produce wire product 3.
  • Sensing device 4 continuously monitors the diameter of wire product 3 and produces .a signal in response thereto, the said signal controllingQthrough transducer 5, the fluid pressure in die assembly 1, and thereby controlling the diameter of the orifice of the said die assembly 1.
  • Die assembly 1 is seen as comprising circular housing 6 having a threaded male portion 7 adapted to be screwed into threaded female portion 8 of circular cap 9. Housing 6 has a central opening 10 extending therethrough and adapted to receive rod 2. An annular recess 11 is formed in the interior face of housing 6, providing a tapered seat 12 and a shoulder 13.
  • Cap 9 has a central opening 14 extending therethrough and adapted to receive wire product 3.
  • An annular recess 15 is formed in the interior face of cap 9, providing a tapered seat 16 and a shoulder 17.
  • a chamber 18 is defined.
  • Die 20 has a circular outer periphery 21, and the innermost portions 22 of segments 19 are concave arcs of a circle of the same diameter as the outer periphery 21 of die 20, whereby the segments 19 are adapted to properly seat on their respective portions of the outer periphery 21 of die 20.
  • the outer periphery 21 extends beyond the tapered seats 12 and 16 of housing 6 and cap 9.
  • the diameter of outer periphery 21 of die 20 is somewhat greater than the diameter of tapered seats 12 and 16, measured at shoulders 13 and 17, respectively.
  • the outer periphery 23 of segments 19, in assembled relation, is circular.
  • a liner or band 24 which is adapted to be forced, by means hereinafter to be described, inwardly against the outer periphery 23 of segments 19 whereby to constrict the said segments 19.
  • Liner or band 24 is, in effect, the movable wall of a fluid expandable chamber 25 within chamber 18.
  • Liner 24 is preferably constructed of metallic material, such as a berylliumcopper alloy, or other alloy having a relatively low modulus of elasticity.
  • liner 24 may be constructed of resilient non-metallic material.
  • Housing 6 is provided with opening 26 communicating with chamber 25 and having a threaded inlet adapted to receive the threaded end of a fluid conduit 27.
  • liner 24 is forced inwardly against the outer periphery 23 of segments 19, thereby constricting the said assembly of segments 19 about die 20, and thereby constricting the said die 20 and decreasing the diameter of the orifice 30 through the said die 20.
  • Sensing device 4 may be any one of several wire diameter monitoring devices known in the art.
  • sensing device 4 may employ the techniques of wire diameter measurement utilizing the generation and detection of light diffraction patterns as disclosed in that portion entitled Wire Diameter Monitoring Systems, and specifically that sub-portion entitled Simple Diffraction Effects, of a paper, Lasers in Industry, by R. M. Lumley et al. delivered before U. S. Health Service personnel at Rutgers University on Oct. 21, 1968.
  • Sensing device 4 which is positioned on the exit side of die assembly 1, continuously measures the diameter of wire product 3 and continuously generates an electrical signal which is a function of the diameter of the said wire product 3.
  • the electrical signal from sensing device 4 is fed, through line 31 shown schematically in FIG. 1, to transducer5.
  • Transducer may be any one of several types known in the art for converting an electrical signal to a fluid pressure signal. Specifically, when the electrical signal from sensing device 4 indicates that the diameter of wire product 3 has increased beyond a predetermined limit, indicating that excessive wear has occurred in die 20, transducer 5, in response to such electrical signal, will produce a higher pressure fluid signal in conduit 27, thereby to increase the fluid pressure in chamber 25. I
  • sensing device 4 continuously monitors the diameter of wire product 3 drawn or extruded through die and, when die wear occurs such as to produce wire 3 having greater than a predetermined maximum diameter, the electrical signal from sensing device 4 operates, through transducer 5,
  • a particular advantage of the present invention permits the use of dies 20 which are less expensive than diamond dies.
  • dies 20 may, for example, be made of carbide steel.
  • the die orifice diameter control means of the present invention may provide such less-expensive die with greater effective and useful life than a diamond die without the die orifice diameter control of the present invention.
  • cap 9 is provided with flange 31.
  • Housing 32 with flange 33 is mounted adjacent to die housing 1 suitable threaded bolts (not shown) being passed through apertures in flanges 31 and 33 and threadablyreceiving nuts (not shown), whereby the said flanges 31 and 33, and
  • Housing 32 is provided with a chamber 34 communicating with conduit 35, the latter surrounding and receiving wire 3 and being dimensioned as hereinafter described.
  • Opening 36 with threaded inlet adapted to receive the threaded end of a fluid conduit 37, communicates between chamber 34 and conduit 27.
  • pump 38 with suction connection to a suitable source (not shown) of fluid, has its discharge connected through adjustable flow control valve 39 to conduit 27.
  • Valve 39 can be adjusted to deliver a constant volumetric rate of fluid.
  • pump 38 can be of the constant volume type, in which event valve 39 need not be employed.
  • Seal 40 is interposed between housing 32 and die housing 1 to prevent leakage of fluid from chamber 34 between the said housing 32 and die housing 1.
  • the diameter of conduit 35 preferably is chosen to be slightly in excess of the maximum acceptable diamev some clearance between wire 3 and conduit 35, there will be some leakage of fluid from chamber 34 thrbugh conduit 35 to the atmosphere.
  • the rate of fluid leakage will be a function of the pressure drop from end-to-end of conduit 35 (i.e., the pressure in chamber 34), the length of conduit 35, the clearance between conduit 35 and wire 3, the viscosity of the fluid, and the velocity of the wire. With all these factors constant, the rate of leakage will likewise be constant. It will be apparent that such fluid leakage through conduit 35 constitutes the bleeding off of fluid from conduit 27.
  • valve 39 is adjusted to a threshold value, so that fluid leaks through conduit 35 at a constant rate and the pressure in chamber 25 is just sufficient force to urge segments 19 against die 20 but without sufficient force to constrict the said die 20.
  • the diameter of wire 3 increases, the clearance between conduit 35 and wire 3 decreases, less fluid is bled off from conduit 27, and the pressure in chamber 25 increases.
  • segment 19 will be urged inwardly with sufficient force to constrict die thereby to retard the adverse effect of die wear on wire diameter.
  • FIG. 4 In the event the force amplification effect is insufficient to adequately constrict die 20, the embodiment of FIG. 4 is employed, which embodiment is generally similar to that of FIG. 3, except that a conventional fluid pressure booster or amplifier 41 is employed.
  • Conduit 27 communicates between the output of fluid pressure booster 41 and chamber of die housing 1 through opening 26.
  • Pump 38 operating through flow control valve 39 pressurizes conduit 42 communicating with the input of fluid pressure booster 41, conduit 37 bleeding off fluid from conduit 42 through conduit 35 as hereinbefore described in connection with the operation of the embodiment of FIG. 3.
  • FIG. 4 The operation of the embodiment of FIG. 4 will be apparent, being identical to that of FIG. 3, except that the pressure level in chamber 25 is amplified through fluid pressure booster 41 sufficiently to force segments 19 against die 20 thereby to adequately constrict orifice and thereby retard the adverse effect of die wear on wire diameter.
  • Apparatus for deforming rod to produce wire comprising:
  • a housing having a central opening formed therethrough along its longitudinal axis;
  • a die having an orifice therethrough, said die being mounted within said housing in said slot, said orifice registering with said central opening, said die being adapted to receive and deform rod to produce wire, said die having a circular outer periphery, said die further being subject to wear whereby said orifice increases in diameter in use;
  • an assembly of plurality of tapered segments f. a band disposed within said chamber and inwardly spaced from the outer wall of said chamber, said band constituting a movable wall of an expandable sub-chamber within the said chamber, said band engaging the circular outer periphery of said assembly of segments;
  • control means adapted to monitor the diameter of said wire and to detect increase thereof, said control means introducing fluid pressure within said expandable sub-chamber in response to increase in diameter of said wire to force said band against the circular outer Periphery of said assembly of segments thereby 0 force said segments um ormly 1nwardly against the circular outer periphery of said die whereby to constrict said orifice.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Metal Extraction Processes (AREA)
US00122319A 1971-03-09 1971-03-09 Variable orifice die and control therefor Expired - Lifetime US3719065A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12231971A 1971-03-09 1971-03-09

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US3719065A true US3719065A (en) 1973-03-06

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US00122319A Expired - Lifetime US3719065A (en) 1971-03-09 1971-03-09 Variable orifice die and control therefor

Country Status (9)

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US (1) US3719065A (sv)
BE (1) BE780102A (sv)
CA (1) CA937202A (sv)
CH (1) CH537220A (sv)
DE (1) DE2210273A1 (sv)
ES (1) ES400994A1 (sv)
FR (1) FR2128726B1 (sv)
GB (1) GB1379682A (sv)
SE (1) SE389815B (sv)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498858A (en) * 1982-08-23 1985-02-12 Philip Morris Incorporated Heated die for carbonized material
US20060112750A1 (en) * 2004-11-29 2006-06-01 Korea Institute Of Science And Technology Continuous shear-deformation apparatus for controlling thickness uniformity of a metal sheet
US20070001347A1 (en) * 2005-07-01 2007-01-04 Troester Gmbh & Co., Kg Method and device for the production of electric conductors with a sheathing
US20150101828A1 (en) * 2013-10-11 2015-04-16 Schlumberger Technology Corporation Tube Forming Device
KR20180063054A (ko) * 2015-10-08 2018-06-11 필립모리스 프로덕츠 에스.에이. 세장형 로드의 직경 조정 방법
CN113634683A (zh) * 2021-10-12 2021-11-12 江苏鑫平金属制品有限公司 光纤用钢丝材定形用模具装置
US11571728B1 (en) * 2022-02-15 2023-02-07 John M. Helfrich Adjustable diameter die assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207378A1 (de) * 1992-03-09 1993-03-18 Friedhelm Dr Ing Juette Umformwerkzeug
DE102004004109B4 (de) * 2004-01-23 2009-11-12 Institut für Umformtechnik Universität Stuttgart Vorrichtung zur Verstellung des Matrizendurchmessers beim Ziehen, Durchdrücken und Fließpressen
CN113102534B (zh) * 2021-04-14 2023-06-20 烟台大学 一种变截面铝合金型材热挤压装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US432236A (en) * 1890-07-15 Reuben hadfield
US1013016A (en) * 1911-06-23 1911-12-26 British Steel & Wire Company Ltd Machine for tapering wire.
US2578229A (en) * 1947-11-17 1951-12-11 Clement Marcel Rene Draw plate
US3134832A (en) * 1962-02-16 1964-05-26 Dow Corning Method for producing extruded articles
US3169424A (en) * 1962-01-30 1965-02-16 Gen Electric Automatic control system for rolling mills and adjustable dies
US3178770A (en) * 1962-01-19 1965-04-20 Du Pont Variable orifice extruder die
US3243985A (en) * 1964-09-28 1966-04-05 Atomic Energy Authority Uk Extrusion apparatus
US3526113A (en) * 1968-04-12 1970-09-01 Morgan Construction Co Automatic shape control system for bar mill
US3540259A (en) * 1968-08-20 1970-11-17 Battelle Development Corp Segmented die holder for drawing apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US432236A (en) * 1890-07-15 Reuben hadfield
US1013016A (en) * 1911-06-23 1911-12-26 British Steel & Wire Company Ltd Machine for tapering wire.
US2578229A (en) * 1947-11-17 1951-12-11 Clement Marcel Rene Draw plate
US3178770A (en) * 1962-01-19 1965-04-20 Du Pont Variable orifice extruder die
US3169424A (en) * 1962-01-30 1965-02-16 Gen Electric Automatic control system for rolling mills and adjustable dies
US3134832A (en) * 1962-02-16 1964-05-26 Dow Corning Method for producing extruded articles
US3243985A (en) * 1964-09-28 1966-04-05 Atomic Energy Authority Uk Extrusion apparatus
US3526113A (en) * 1968-04-12 1970-09-01 Morgan Construction Co Automatic shape control system for bar mill
US3540259A (en) * 1968-08-20 1970-11-17 Battelle Development Corp Segmented die holder for drawing apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498858A (en) * 1982-08-23 1985-02-12 Philip Morris Incorporated Heated die for carbonized material
US20060112750A1 (en) * 2004-11-29 2006-06-01 Korea Institute Of Science And Technology Continuous shear-deformation apparatus for controlling thickness uniformity of a metal sheet
US7127927B2 (en) * 2004-11-29 2006-10-31 Korea Institute Of Science And Technology Continuous shear-deformation apparatus for controlling thickness uniformity of a metal sheet
US20070001347A1 (en) * 2005-07-01 2007-01-04 Troester Gmbh & Co., Kg Method and device for the production of electric conductors with a sheathing
US20150101828A1 (en) * 2013-10-11 2015-04-16 Schlumberger Technology Corporation Tube Forming Device
KR20180063054A (ko) * 2015-10-08 2018-06-11 필립모리스 프로덕츠 에스.에이. 세장형 로드의 직경 조정 방법
JP2018533361A (ja) * 2015-10-08 2018-11-15 フィリップ・モーリス・プロダクツ・ソシエテ・アノニム 細長いロッドの直径を調整するための方法
CN113634683A (zh) * 2021-10-12 2021-11-12 江苏鑫平金属制品有限公司 光纤用钢丝材定形用模具装置
US11571728B1 (en) * 2022-02-15 2023-02-07 John M. Helfrich Adjustable diameter die assembly

Also Published As

Publication number Publication date
FR2128726B1 (sv) 1974-09-13
SE389815B (sv) 1976-11-22
FR2128726A1 (sv) 1972-10-20
GB1379682A (en) 1975-01-08
CH537220A (de) 1973-05-31
CA937202A (en) 1973-11-20
ES400994A1 (es) 1975-02-01
BE780102A (fr) 1972-07-03
DE2210273A1 (de) 1972-09-14

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AS Assignment

Owner name: AT & T TECHNOLOGIES, INC.,

Free format text: CHANGE OF NAME;ASSIGNOR:WESTERN ELECTRIC COMPANY, INCORPORATED;REEL/FRAME:004251/0868

Effective date: 19831229