US3841129A - Continuous, hydrostatic extrusion process and an apparatus using the same - Google Patents

Continuous, hydrostatic extrusion process and an apparatus using the same Download PDF

Info

Publication number
US3841129A
US3841129A US00341795A US34179573A US3841129A US 3841129 A US3841129 A US 3841129A US 00341795 A US00341795 A US 00341795A US 34179573 A US34179573 A US 34179573A US 3841129 A US3841129 A US 3841129A
Authority
US
United States
Prior art keywords
wire
extrusion
high pressure
continuous
hydrostatic
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
US00341795A
Other languages
English (en)
Inventor
M Noguti
Y Yamaguchi
T Matsushita
M Nishihara
T Fujita
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Application granted granted Critical
Publication of US3841129A publication Critical patent/US3841129A/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
    • 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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/007—Hydrostatic extrusion
    • B21C23/008—Continuous extrusion

Definitions

  • heating means is provided within the chamber for heating the wire piror to extrusion.
  • the apparatus further permits at least two stages of continuous drawing and extrusion of a stock wire by utilizing assembled units each of which incorporates the aforesaid features.
  • the present invention relates generally to a hydrostatic extrusion process and apparatus, and more particularly to a continuous hydrostatic extrusion process and apparatus wherein a stock wire is continuously extruded under a hydrostatic pressure.
  • a further object of the present invention is to provide an improved-hydrostatic extrusion process and an apparatus, wherein a stock wire of a substantially unlimited length can be force fed or drawn through a drawing die into a high pressure chamber and then continuously extruded through another die under a high hydrostatic pressure so as to attain a cross-section commensurate with the shape of the opening of the extrusion die, and wherein there is provided a heating means adapted to heat the stock wire prior to extrusion so as to thereby permit the continuous extrusion of the wire at a greater percentage of reduction in cross-sectional area.
  • a still further object of the-present invention is to provide an improved hydrostatic extrusion process and an apparatus, wherein a stock wire of a substantially unlimited length may be'force fed or drawn through a primary drawing die into a primary high pressure chamber, and then extruded under a high hydrostatic pressure existing within the chamber through a primary extrusion die so as to attain a cross-section commensurate with the shape of the opening of the primary extrusion die so as to thereby obtain a primary wire product, after which such primary wire product may be force fed or sion of a process and apparatus wherein a stock wire is force fed through a drawing die and into a high pressure chamber whereupon it is subsequently wound around a driven intermediate winding.
  • means or spool after which the wire 'thus wound may be extruded under a hydrostatic pressure through an extrusion die provided within the wall of the chamber and finally wound around a take-up means outside of the chamber.
  • heating means which is adapted to heat the stock wire inside the chamber and prior to extrusion, further presents an advantage of a greater percentage of reduction in cross-sectional area of the wire.
  • a cycle of drawing the stock .wire by utilizing the rotary motion of the driven spool and then extruding the wire under hydrostatic pressure through an extrusion die can be used in stages to thereby enablean improved, continuous, hydrostatic extrusion of a wire.
  • FIG. 1 is across-sectional view of a continuous hydrostatic extrusion apparatus constructed according to the: present invention: and showing its cooperative
  • FIG. 2 is a cross-sectional view of anio dified spool which may be utilized within the apparatus of FIG. I;
  • FIGS 3, 4 and 5 are cross-sectional viewsof another embodimentof a continuous'hydrostaticextrusion apparatus constructed according to the present invention;
  • FIG. 6 is a schematic view of still another embodiment of a continuous, hydrostatic extrusion apparatus constructed according to the present invention.
  • FIG. 7 is a partial sectional view of a continuous hydrostatic extrusion apparatus constructed according to DETAILED DESCRIPTION OF Tl-IE PREFERRED EMBODIMENTS
  • a closed, cylindrical container 1 which defines a high pressure chamber which can withstand the high operational fluid pressure and which houses an intermediate winding means 'or spool 2 therein.
  • the spool 2 is integral with a drive shaft 3 one end of which extends externally of the chamber 1 so as to be rotated by means of an appropriate power source at a predetermined R.P.M., and the drive shaft 3 is sealed in a liquid-tight manner relative to the wall of the high pressure chamber 1 by means of packings 4, 5 and 6, such that there is no likelihood of leakage of liquid therefrom under the high operational pressures.
  • the axially outward force exerted by the fluid pressure acts upon the spool 2, and consequently, the spool 2 must positively rotate under such conditions.
  • a thrust bearing 7 may be interposed between the wall of the high pressure chamber and the spool 2, or alternatively, the thrust bearing may be provided externally of the high pressure container whereby it is also able to receive the axial force caused by the high internal pressure.
  • a stock wire ,8 to be continuously introduced into the high pressure chamber from a position externally thereof is drawn through a radially aligned drawing die 9 provided within another wall of the high pressure chamber, whereby the wire of reduced diameter 11 is then wound upon the spool 2 in a spiral fashion.
  • Substantially T-shaped fastening means 10 serves to guide the stock wire being fed as well as to rigidly mount the die 9 within thewall of the chamber 1, and the stock wire 8 is force-drawn through the die 9 into the high pressure chamber 1 by virtue of rotation of the spool 2, such procedure serving to-prevent-the leakage of the liquid which is contained within the chamber under high pressure.
  • a pressure of approximately 600 kg/cm can be maintained for an aluminum wire of 0.2% yield strength of approximately 4 kg/mm'f
  • a pressure of approximately 2,500 kg/cm can be maintained for a copper wire of 0.2% yield strength of approximately 8 kg/mm
  • a pressure of approximately 8,000 kg/cm can be maintained for a steel wire having a yield strength of approximately 70 kg/mm
  • the number of turns of the stock wire 11 to be wound upon the spool 2 should be such that the frictional force between the spool 2 and the wire 11 is greater than the force required for drawingthe stock wire 8 into the high pressure chamber, and ingeneral, such desired number of turns may be, for example, several turns.
  • the wire which has been wound around -the spool 2 from its base to its tip in a manner so as not to cause any overlapping portion thereon may then be extruded to the atmosphere, through means of an axially aligned extrusion die 12 which is provided within the end wall of the high pressure chamber 1 which is opposite the wall in which drive shaft 3 is mounted, under a high hydrostatic pressure whereby the resulting extruded wire is of still smaller diameter.
  • the wire thus extruded may then be wound by means of a suitable take-up machine which maintains the wire under tension.
  • the extrusion die 12 is sealed within a cylindrical die receiving means 14 by means of suitable packing 13, and similarly, the die receiving means 14 is sealed relative to the high pressure chamber 1.
  • a liquid 15 under high pressure produced by means of a suitable high pressure generating means, not shown, is introduced into the high-pressure chamber 1 through means of a radially extending high-pressure pipe 16 coupled to the high pressure chamber 1 by means of another substantially T-shaped fastening means 17.
  • the continuous, hydrostatic extrusion apparatus of the present invention thus includes means for drawing a stock wire 18 into the high pressure chamber 1 and subsequently winding'the same around a driven spool or intermediate'winding means, followed by the extrusion of the wire-out of the chamber 1 under hydrostatic pressure.
  • This permits the use of a stock wire having a substantially unlimited length with the result of achieving a wire productalso of a substantially unlimited length.
  • the spool 2 within the high pressure chamber 1 for winding the wire therearound asan intermediate step.
  • the frictional resistance .of the wire relative to-the spool2. is increased a substantial degree, extrusion of the wire 11 through the drawing 9 does not occur, whileextrusion of the vwire through the extrusion die 12 does occur thus permitting continuous extrusion of the wire.
  • a wire supporting or pressing means 18 which serves to increase the frictional resistance of the wire 11 relative to the spool 2 thereby preventing the wire from being extruded back through the die 9.
  • the pressing means 18 may be of the spring type, such as for example, a type which utilizes an arcuate plate or rotating roller springbiased against the spool 2.
  • FIG. 2 there may be disposed about the outer periphery of the spool 2 a cylinder 19 which is formed with a spiral, semi-circular groove within the inner peripheral surface thereof, the groove having a diameter substantially equal to that of the wire 11.
  • the cylinder 19 is affixed to the body of the high pressure chamber 1, and consequently, the wire wound around the spool 2 may be fed from the entrance of the cylinder 19, through the spiral groove thereof, and out of an exit 20 such that the great frictional resistance produced between the spool 2 and the wire 11 may serve to prevent the wire 11 from being pushed back toward the die 9.
  • the viscosity of the pressure medium should be adjusted so as to minimize such frictional losses or alternatively, gas may be utilized as the pressure medium.
  • a stock wire is initially wound around a spool located within the high pressure chamber and subsequently extruded to atmosphere.
  • the pressure within the high pressure chamber is governed by the sealing'capability of the drawing die through which is drawn'the stock wire, and such a pressure is limited to approximately 600 kg/cm fora soft, pure aluminum wire, approximately 2,500 kg/cm for a copper wire, and approximately 8,000 kg/cm for a steel wire, thepressure thus varying with the types of wire materials used.
  • the wire 11 which has been wound around the spool 2 is thus extruded out of the high pressure chamber through the axially aligned die 12 provided within one end wall of the high pressure chamber and wound by means of a take-up machine, not shown, under tension which is less than the yield strength of the wire product all being similar to the embodiment of FIG. 1, except that the wire 11 is also passed through an electric heating means 21 immediately before passing through the die 12.
  • the electricity for use within the electric heating means 21 is fed through a terminal 24 and a lead wire 25 connected thereto, with the body of the high pressure chamber 1 serving as another electrode;
  • the terminal 24 and the lead wire 25 are led through a suitable passage provided within a cylindrical die supporting means 29 which is similar to means 14, the terminal being anchored within a conically shaped aperture of means 29, and there being further provided insulating material 23 interposed thereb'etween.
  • electrical circuits may be completed between the rotating rollers'of the heating'means 21 and the die 12, and between the rotating rollers and the spool 2, respectively. Since the rollers are shortcircuited to the die 12, the electrical heating of the rollers may be effected.
  • the wire 11 is heated to a desired temperature which softens the same and permits its passage through the die 12, with the result that aconsiderable decrease in the deformation resistance of the wire and av greater percentage of reduction in cross-sectional area of the wire in terms of a constant interior pressure existing within the high pressure chamber 1 can occur.
  • an annular partition wall26 Surrounding the heating means 21 is an annular partition wall26 which further includes a heat insulating layer 27 which isprovided upon the inte'rior surface thereof so as'to surround the'heating means "21 and thereby minimize theheat loss within; such heating area. Since the sealing capability of the drawing 9 is de-' pendent upon the deformation resistance of the stock wire 8, it is preferable to increase the percentage of reduction ,in the cross-sectional area of the wire at the time of extrusion through the die 12 after the stock should be noted that the temperature which can be attained by utilizing the heating means 21 depends upon the magnitude of the electricity conducted through the terminal 24 and the lead wire 25 in addition to the properties of the pressure medium.
  • the temperature which can be attained will be within the range of from 200to 250C, and if a silicon oil is used, the temperature can be raised to approximately 350C. Furthermore, if argon or nitrogen gas is used as the pressure medium, a still higher temperature can be attained.
  • a stock wire is drawn into a pressure chamber and subsequently wound around a driven spool, after which the wire is extruded to the atmosphere.
  • the pressure within the high pressure chamber is substantially proportional to the magnitude ofthe flow stress of the stock wire such that there results a limitation to the percentage of reduction in cross sectional area of the wire which is to be extruded out of the chamber.
  • a third embodiment of the present invention as shown in FIG.
  • a first spool 102 disposed interiorly of a first high pressure container 101, spool 102 being integral with a first drive shaft 103 so as to rotate therewith at a given R.P.M. by means of a suitable drive means, not shown.
  • Seals 104, 105 and 106 are disposed about shaft 103 and serve to prevent the leakage of liquid from the high pressure container 101 out passed the shaft 103, while a first thrust bearing 107 is interposed between the spool 102 and end wall of container 101 so as to receive the axial force acting upon the spool 102.
  • a first stock wire 108 is drawn from a position exteriorly of the first container 101 through a radially aligned drawing die 109 of container 101 and then wound around the first intermediate winding means or spool 102, the forward end of wire 108 serving as a'second stock wire 111 which is similarly drawn'through a second radially aligned extrusion or drawing die 112 which is rigidly fixed within a 'side wall of a second high pressure container 119 by means'of a fastening device 114,
  • container 119 being concentric with container 101.
  • the wire 111 is then led into the high pressure container 119 whereupon it is wound around a second intermediate winding means or spool 120 which rotates within the container 119.
  • the pressure of the liquid 115 within the first high pressure container 101 is ini-.
  • a high pressure generating means located exteriorly of the container 101 and is then fed into con tainer 101 through means of a radially extending pipe 116 which is disposed within a side wall of container 101/1n addition, a first pressing plate 118 is also provided within container 101 so as to effectively produce the desired frictional force between the first spool 102 and the second stock wire 111.
  • the rotation of the first spool 102 is transmitted via a first gear mechanism 121 to a second drive shaft 122 so as to thereby effect the rotation of the second intermediate winding means or spool 120.
  • the gear mechanism 121 should be such that the rotational speed of the spool 120 be greater than that of the spool 102, and that the ratio of the rotational speeds of the spools 120 and 102 be governed by the percentage of reduction in cross-sectional area of the wire 111 passing through the die 112.
  • a cover 123 is interposed between the gear mechanism 121 and the stock wire 111 so as to prevent any interference or binding therebetween, and a seal 124 serves to prevent any leakage of pressurized liquid from the container 119 out passed the drive shaft 122.
  • the pressure P of liquid 115 disposed within the first high pressure container 101 is dependent mainly upon the sealing capability of the die through which the stock wire 108 is being drawn, while, in general, there can be maintained a pressure which exceeds the value corresponding to the yield strength of the wire.
  • the same principle applies to the die 112 such that it is possible to raise the pressure P of liquid 128 within the second container 119 to a value greater than the pressure P, within the first container 101 by approximately 1,000 kg/cm for a work-hardened aluminum wire, and approximately 3,000 kg/cm for a workhardened copper wire, such pressure being attained by means of a high pressure generating means, not shown, located exteriorly of container 1 19 and which conducts the liquid through a radial passage 127 which is provided within a side wall of container 119.
  • a high pressure generating means not shown
  • the third stock wire 126 within the second container 119 passes through a third radially aligned extrusion or drawing die 129 to be wound around a third intermediate winding means or spool 131 located within a third high pressure container 130 which is also concentric with containers 101 and 119.
  • a pressing plate 139 is provided for the third spool 131 so as to minimize the slippage between such spool and the stock wire 126, and the rotation of the third spool 131 is effected by means of the rotation of the second spool 120 the rotary motion of which is transmitted via a second gearmechanism 132 and a third drive shaft 133 such that the ratio of the rotational speeds of the spools should accommodate the percentage of reduction in cross-sectional area of the wire at the die 129. Sealing between the drive shaft 133 and the container 130 is effected bymeans of suitable packing rings 134.
  • the pressure-P of the liquid 135 disposed within the third container 130 is greater than the pressure P of the liquid 128 within container 119, the pressure of. the liquid 135 being raised to the predetermined pressure P by means of a high pressure generating means, not shown, disposed exteriorly of the container whereupon the liquid may be fed through a radialpassage 136 which extends through a side wall of container 130,.
  • the stock wire 137 may in turn be wound around the three spools 102,120, and'131'and then extruded througha fourth axially aligned extrusion die 138 to the atmosphere to form a final wire product 148.
  • Heating means 143 are also provided to heat the stock wire 137 prior to such wire being drawn through the fourth die 138, and it is recommended that such electrical heating means be used for a wire having a smaller gauge, whereby the electricity may be fed to the heating means 143 through means of an electrode 145 which is mounted within the die receiving means 144, and 'a lead wire 147.
  • An insulating body 146 is interposed between electrode 145 and receiving means 144, and consequently the stock wire 137 may be heated and subsequently drawn through the .die 138 so as to experience a greater percentage of reduction in cross-sectional area.
  • Rollers 149 serve as a guide means for the stock wire 137 entering the vicinity of heating means 143, thereby enhancing the electrical heating effect, and in addition, there is also provided a substantially annular partition wall 150 for defining the heating zone, an insulating material 151 being provided upon the inner surface of wall 150 so as to improve the heat insulation.
  • the third embodiment shown in FIG. 4 is thus directed to a combination of units, wherein, for each unit, there is provided an intermediate winding means within a high pressure chamber and a stock wire is able to be continuously drawn into the chamber by rotation of the winding means, after which that end of the wire thus wound is extruded out of the chamber.
  • the embodiment is characterized by the fact that such units are assembled so as to form a multi-stage construction in which there exists differences in fluid pressure between the container of the first stage and the container of the second stage, and between the container of the second stage and the container of the third stage, whereby it is possible to continuously extrude and draw the stock wire under a high pressure.
  • Such embodiment is further characterized by the fact that at least one heating means is provided as required to thereby achieve a greater percentage of reduction in crosssectional area of the wire at the time of extrusion.
  • the principal object of this embodiment is attained when the fluid pressures P P and P within the respective containers 101, 119 and 130 are predetermined according to the following relationship:
  • any multi-stage construction suchas for example, those apparatus utilizing two, four, orfive stagescan be used, and despite the possible advantage of achieving a substantially greater percentage of reduction in the crosssectional area of the'wire, the construction of such a system would be rather complex.
  • Packing rings 4 and 5 are interposed between the bearings'7a and 7b, and the container 1, respectively whereby fluid leakage between the shaft 3and container 1 is prevented.
  • One end of the shaft 3 is adapted to be rotated at a predeter mined'R.P.M. by means of a suitable drive source, not shown.
  • the container 1 While it may not be wholly advantageous, in all respects, for the container 1 to be provided with radial apertures which are adapted to receive therein the bearings 70 and 7b for mounting the shaft 3, the predominant advantage attained is that the axial force produced upon the spool 2 can be eliminated.
  • FIG. 6 permits a plurality of units as shown in FIG. to be assembled in an axial direction, in which the R.P.M. of shafts 3a, 3b and 30 within the containers la, 1b, and 1c can be externally and independently adjusted.
  • FIG. 7 a further embodiment of the present invention is shown wherein a stock wire 301 is conducted into the high pressure chamber 300 through means of appropriate sealing means which includes 0- rings 304 and V-shaped packing 305, the drawing die having been eliminated.
  • the wire 301 is further guided through an axial passageway within tightening means 302 which also serves to maintain the sealing means in proper relation to chamber 300 whereby the wire 301 may be introduced into the chamber 300 in fluid-tight fashion.
  • the drawing die may be replaced by suitable sealing means so as to nevertheless introduce the stock wire into the high pressure chamber in fluid-tight condition, for the purpose of obtaining a higher reduction in the cross-sectional area of the workpiece, the sealing member may preferably in turn be replaced by the drawing die through which means the sealing function is similarly attained.
  • FIG. 8 still another embodiment of the present invention is disclosed wherein the high pressure chamber 200 has an axially rotating shaft 201 disposed therein, the ends of which are supported within cap screws 202 which in turn have, at their inner portions, recess means for housing sealing means 203.
  • a high pressure fluid 204 which is produced by means of a high pressure generating source, not shown, may be introduced into chamber 200 through means of a radially extending high pressure pipe 206 whichis secured relative to chamber 200 by substantially T- shaped fastening 'means 205.
  • the stock wire 207 is thus charged into the high pressure chamber200 through means of the radially extending sealing member or drawing die 208 whereupon it is subsequently wound about shaft 201 which is rotated by suitable driving means, not shown, and finally extruded through a radially extending extrusion die 209 under the influence of the hydrostatic pressure, die 209 being laterally offset relative to drawing die 208.
  • a continuous, hydrostatic extrusion process characterized in that said process comprises the steps of:
  • a continuous, hydrostatic extrusion process characterized in that said process comprises at least two sequential stages each of which comprises:
  • a continuous, hydrostatic extrusion apparatus comprising:
  • an intermediate winding means provided within said chamber for continuously winding a stock wire therearound; r sealing means adapted to' charge said stock wire into said high pressure chamber and conduct said wire tosaid winding means under the influence of the continuous rotary motion of said winding means;
  • a continuous, hydrostatic extrusion apparatus characterized in that said apparatus includes at least two stages each unit or stage of which comprises:
  • an extrusion die adapted to extrude said wound wire from said high pressure chamber under the influence of said hydrostatic pressure, whereby said stock wire is charged through said sealing means by means of said intermediate winding means within one of said stages and is extruded through said extrusion die of said one of said stages so as to be conducted through a successing stage and ultimately be extruded to atmosphere through said extrusion die of the final one of said stages under the influence of said hydrostatic pressure.
  • a continuous, hydrostatic extrusion apparatus as set forth in claim 7, wherein said extrusion die of one of said stages serves as said sealing means of a succeeding one of said stages.
  • sealing means is a drawing die whereby said stock wire may be continuously force drawn into said high pressure chamber through said drawing die.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Metal Extraction Processes (AREA)
US00341795A 1972-03-17 1973-03-15 Continuous, hydrostatic extrusion process and an apparatus using the same Expired - Lifetime US3841129A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2722272A JPS535266B2 (xx) 1972-03-17 1972-03-17

Publications (1)

Publication Number Publication Date
US3841129A true US3841129A (en) 1974-10-15

Family

ID=12215058

Family Applications (1)

Application Number Title Priority Date Filing Date
US00341795A Expired - Lifetime US3841129A (en) 1972-03-17 1973-03-15 Continuous, hydrostatic extrusion process and an apparatus using the same

Country Status (6)

Country Link
US (1) US3841129A (xx)
JP (1) JPS535266B2 (xx)
BE (1) BE796918A (xx)
DE (1) DE2313323C3 (xx)
FR (1) FR2329368A1 (xx)
GB (1) GB1430623A (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926023A (en) * 1974-02-06 1975-12-16 Sumitomo Electric Industries Hydrostatic extrusion process for producing fine gauge wires
US4345451A (en) * 1978-12-12 1982-08-24 Marshall Richards Barcro Limited Wire drawing method and apparatus
US4464922A (en) * 1978-12-12 1984-08-14 Marshall Richards Barcro Limited Wire drawing method and apparatus
US4471527A (en) * 1981-11-05 1984-09-18 Yazaki Corporation Method and apparatus for the production of stranded cable
US5893287A (en) * 1997-03-14 1999-04-13 Project 3-P Precise Pipe Production Ltd. Method and device for combined drawing and hydrostatic extrusion of billets from metal and alloys
WO2012006270A1 (en) 2010-07-06 2012-01-12 Austen Alfred R Method and apparatus for applying uniaxial compression stresses to a moving wire
US9248484B2 (en) 2010-07-06 2016-02-02 Alfred R. Austen Method and apparatus for applying uniaxial compression stresses to a moving wire
CN109930016A (zh) * 2017-12-18 2019-06-25 北京有色金属研究总院 一种高强高导铜银合金微细线的制备方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999415A (en) * 1975-12-22 1976-12-28 Alfred Robertson Austen Method and apparatus for extrusion
BG41686A1 (en) * 1984-12-17 1987-08-14 Petkov Device for drawing of wire
CN110996592B (zh) * 2019-12-03 2021-11-05 深圳市广和辉贸易有限公司 一种用于隧道的具有防潮功能的通讯设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB974959A (en) * 1962-09-15 1964-11-11 Birmingham Small Arms Co Ltd Improvements in or relating to the extrusion of metals
US3344636A (en) * 1963-04-04 1967-10-03 Council Scient Ind Res Extrusion of metals
US3415088A (en) * 1965-03-23 1968-12-10 Technology Uk Extrusion method and apparatus
US3449935A (en) * 1965-09-17 1969-06-17 Nat Res Dev Apparatus and method of metal extrusion

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2003356A1 (de) * 1969-01-28 1970-09-24 Western Electric Co Verfahren und Einrichtung fuer den Bewegungsantrieb eines Werkstuecks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB974959A (en) * 1962-09-15 1964-11-11 Birmingham Small Arms Co Ltd Improvements in or relating to the extrusion of metals
US3344636A (en) * 1963-04-04 1967-10-03 Council Scient Ind Res Extrusion of metals
US3415088A (en) * 1965-03-23 1968-12-10 Technology Uk Extrusion method and apparatus
US3449935A (en) * 1965-09-17 1969-06-17 Nat Res Dev Apparatus and method of metal extrusion

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926023A (en) * 1974-02-06 1975-12-16 Sumitomo Electric Industries Hydrostatic extrusion process for producing fine gauge wires
US4345451A (en) * 1978-12-12 1982-08-24 Marshall Richards Barcro Limited Wire drawing method and apparatus
US4464922A (en) * 1978-12-12 1984-08-14 Marshall Richards Barcro Limited Wire drawing method and apparatus
US4471527A (en) * 1981-11-05 1984-09-18 Yazaki Corporation Method and apparatus for the production of stranded cable
US5893287A (en) * 1997-03-14 1999-04-13 Project 3-P Precise Pipe Production Ltd. Method and device for combined drawing and hydrostatic extrusion of billets from metal and alloys
WO2012006270A1 (en) 2010-07-06 2012-01-12 Austen Alfred R Method and apparatus for applying uniaxial compression stresses to a moving wire
US8534108B2 (en) 2010-07-06 2013-09-17 Alfred R. Austen Method and apparatus for applying uniaxial compression stresses to a moving wire
US8959970B2 (en) 2010-07-06 2015-02-24 Alfred R. Austen Method and apparatus for applying uniaxial compression stresses to a moving wire
US9248484B2 (en) 2010-07-06 2016-02-02 Alfred R. Austen Method and apparatus for applying uniaxial compression stresses to a moving wire
CN109930016A (zh) * 2017-12-18 2019-06-25 北京有色金属研究总院 一种高强高导铜银合金微细线的制备方法

Also Published As

Publication number Publication date
FR2329368A1 (fr) 1977-05-27
JPS535266B2 (xx) 1978-02-25
FR2329368B1 (xx) 1978-12-01
JPS4895349A (xx) 1973-12-07
DE2313323C3 (de) 1980-01-24
BE796918A (fr) 1973-07-16
DE2313323B2 (de) 1979-05-31
GB1430623A (en) 1976-03-31
DE2313323A1 (de) 1973-10-18

Similar Documents

Publication Publication Date Title
US3841129A (en) Continuous, hydrostatic extrusion process and an apparatus using the same
US3376180A (en) Method and apparatus for forming a spiral wound tube having an extruded plastic liner
US3808860A (en) Method and apparatus for manufacturing tubes or tubular bodies with inner walls having cross sections of irregular shapes
CN109332739A (zh) 一种液压涨套工装
US3344636A (en) Extrusion of metals
US3884062A (en) Forming of materials
US3020588A (en) Rotary plastic extrusion die
NO874586L (no) Indirekte ekstruderingsprosess og maskineri for dette.
US3807032A (en) Method of manufacturing tubes of compound material
US4028919A (en) Method for extrusion
US4094178A (en) Methods for continuous extrusion
US3602024A (en) Hydrostatic bending and die forming
CN207188483U (zh) 带有主动安全防护的连续挤压机液压螺母总成
US3722245A (en) Hydrostatically operated extruding machine
US4212177A (en) Apparatus for continuous extrusion
US2310091A (en) Machine for and method of bending tubing
US3824825A (en) Forming of materials
US2807971A (en) Cold-working process for articles
US4111023A (en) Method for continuous extrusion
US3733880A (en) Apparatus for and method of facilitating the stripping of cans from a punch and the article formed thereby
US3866306A (en) Method of hydrostatically extruding compound material and compound billets
US1301882A (en) Extruding lead and the like.
US3877272A (en) Method for hydrostatic extrusion of tubes and billets
JPS5832526A (ja) 円筒殻の紐出し加工法
JPS5910414A (ja) 鋼材の連続押出し装置