SU793361A3 - Method of continuous extrusion of long-sized billet - Google Patents

Method of continuous extrusion of long-sized billet Download PDF

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Publication number
SU793361A3
SU793361A3 SU721874093A SU1874093A SU793361A3 SU 793361 A3 SU793361 A3 SU 793361A3 SU 721874093 A SU721874093 A SU 721874093A SU 1874093 A SU1874093 A SU 1874093A SU 793361 A3 SU793361 A3 SU 793361A3
Authority
SU
USSR - Soviet Union
Prior art keywords
jaws
workpiece
die
pressure
coating
Prior art date
Application number
SU721874093A
Other languages
Russian (ru)
Inventor
Джозеф Фукс Фрэнсиз
Original Assignee
Вестерн Электрик Компани Инкорпорейтед (Фирма)
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 US19954271A priority Critical
Application filed by Вестерн Электрик Компани Инкорпорейтед (Фирма) filed Critical Вестерн Электрик Компани Инкорпорейтед (Фирма)
Application granted granted Critical
Publication of SU793361A3 publication Critical patent/SU793361A3/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00Extruding metal; Impact extrusion
    • B21C23/02Making uncoated products
    • B21C23/04Making uncoated products by direct extrusion
    • B21C23/08Making wire, bars, tubes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • B21C1/26Push-bench drawing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/27Carriages; Drives
    • B21C1/30Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00Extruding metal; Impact extrusion
    • B21C23/005Continuous extrusion starting from solid state material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00Extruding metal; Impact extrusion
    • B21C23/007Hydrostatic extrusion
    • B21C23/008Continuous extrusion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00Extruding metal; Impact extrusion
    • B21C23/21Presses specially adapted for extruding metal
    • B21C23/211Press driving devices

Abstract

1400874 Extruding; drawing WESTERN ELECTRIC CO Inc 17 Nov 1972 [17 Nov 1971] 53178/72 Heading B3P An apparatus for the continuous extrusion of an elongated workpiece 2 through a die 12, Fig. 10, comprises sets of segmented gripping jaws 4 which move in endless paths 6 and co-operate on the innermost part of their paths to feed the workpiece to the die and effect the extrusion. The workpiece 2 is coated with a shear transmitting medium such as beeswax or polyethylene wax in two chambers 82, 83, Fig. 4, before reaching the feeding jaws. A sizing die 73 is provided between the chambers and a wiper 79 removes dirt from the workpiece before coating and a wiper 71 determines the thickness of the coating. The coating acts as a lubricant for both the sizing die and the extrusion die and is progressively pressurized by the jaws to beyond the yield strength of the workpiece. The gripping jaws are moved in the feed direction by staggered pinions 5a-5d, 25a- 25d, Fig. 5, which engage teeth on the outside of the jaws. The pinions are housed in a gear block 14 provided with gears trains and fluid driven motors for the pinions, Fig. 3 (not shown). The gear block 14 has a bore 16 to guide the jaws aligned with the bore of a pressure cylinder 11 and the bore of a further gear block 15 downstream of the extrusion die. The gear block 15 also has pinions 27a-27d engaged with the jaws but these pinions drive fluid pumps so that the jaw feed is retarded by the pinions to keep the jaws closely adjacent. The pressure cylinder 11 is internally lined by a sleeve (34), Fig. 8 (not shown), and a segmented sleeve (38a)-(38d), Fig. 9 (not shown). The segments define bores 40 for electrical heaters and supports guiding bars (42) for the jaws. The jaws are urged inwards by fluid pressure to sets of chambers (52a)-(52d), behind the jaws to pressurize the shear transmitting medium. A set of pressure reducing valves (53a)-(53d), (54a)-(54d), (55a)-(55d), Fig. 8 (not shown), ensure that the pressure in the sets chambers behind the jaws is progressively greater in the workpiece feed direction. The jaws are guided in the curved and straight return paths 7, 8, Fig. 5, by segment cross-section passages in guide blocks, Figs. 6 and 7 (not shown). In operation the jaws 4 closely contact the entire perimetric surface of a length of shear transmitting medium coating on the workpiece 2. The feed of the jaws provide a motive force along the surface of the coating and thereby produce a shear force in the coating medium which is applied as viscous drag to propel the workpiece to the die. The viscous drag produces axial compressive stress in the workpiece. The coating medium cannot escape between the jaws and must pass through the extrusion die. The medium accumulates at the entrance of the die and produces normal compressive stress in the workpiece upstream of the die. The difference between the axial and normal stress is arranged to not exceed the yield strength of the workpiece which may be copper or aluminium.

Description

(54

METHOD OF CONTINUOUS EXTRUDING OF LONG-DIMENSIONAL PREPARATION

The invention relates to the field of processing materials by pressure, in particular to methods for producing long articles with high hydrostatic pressure.

A known method for the continuous extrusion of long workpieces, in which the workpiece is moved to the matrix in the pressure chamber by moving and creating pressure 10 outside the medium in contact with the surface of the workpiece and creating a voltage gradient between the axial tension in the pressure chamber and a normal pressure of 15 mm, not exceeding the elastic limit of the material of the workpiece jjTJ,

The disadvantages of the known solution are the low quality of the products due to the periodicity of the change in pressure at the inlet of the die and, as a result, the distortion of the product profile and the low productivity of the process.

This invention allows to increase the productivity of the process and the quality of the product due to the fact that continuously increasing but the value of the normal pressure creates on the surface of the medium, the opposite of 30

the surface in contact with the workpiece, and the values of normal pressures and axial forces continuously increase throughout the pressure chamber, starting from the entrance of the workpiece to its release through the matrix, to create in it a state of increasing plasticity of the material. Furthermore, said medium, for example beeswax, is in contact in the pressure chamber with the preform over its entire surface.

The proposed method is illustrated in the drawing.

The force required to deform the workpiece is transmitted through an annular layer of viscous medium from the moving cylindrical surface surrounding the workpiece 1. This surface is formed by the movement of a non-. groups of segmented elements 2 along closed trajectories m Z.u. The pressure in the working environment increases from the closing point of the segments to the matrix. Beeswax can be used as a medium.

The segments in the gripping section of the workpiece are in a closed position under the action of the pressure of the liquid applied to their outer surface. The pressure is supplied to

zone, adjacent to the matrix, and then continuously decreases from the matrix in the direction of the closing point of the segment elements. The drive of the segment elements is carried out from the hydraulic motors through gears.

Claims (2)

1. A method of continuous extrusion of a lengthy workpiece, in which the workpiece is moved to the matrix in the pressure chamber by moving and creating pressure medium in contact with the surface of the workpiece and creating a pressure gradient between the axial tensile force and normal pressure not exceeding the elastic limit of the workpiece material, characterized in that, in order to increase the productivity of the method and the quality of the products, continuously increasing in magnitude do not create a normal pressure on the surface of the medium opposite to the surface contacting with the workpiece, and the values of normal pressures and axial forces continuously increase the pressure throughout the chamber, starting from the entrance to the preform prior to its exit through the matrix, to create a state of increasing its ductility material.
2. A method according to claim 1, characterized in that said medium, for example bee wax and i, is in contact in the pressure chamber with the workpiece over its entire surface.
Sources of information taken into account in the examination
1. US patent No. 3667267, CL. 72-60 published 06.06.72 (prototype).
SU721874093A 1971-11-17 1972-11-17 Method of continuous extrusion of long-sized billet SU793361A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US19954271A true 1971-11-17 1971-11-17

Publications (1)

Publication Number Publication Date
SU793361A3 true SU793361A3 (en) 1980-12-30

Family

ID=22737973

Family Applications (1)

Application Number Title Priority Date Filing Date
SU721874093A SU793361A3 (en) 1971-11-17 1972-11-17 Method of continuous extrusion of long-sized billet

Country Status (16)

Country Link
US (1) US3740985A (en)
JP (2) JPS5324902B2 (en)
BE (1) BE790903A (en)
CA (1) CA996502A (en)
CH (1) CH570849A5 (en)
CS (1) CS212735B2 (en)
DE (1) DE2255866C3 (en)
ES (1) ES408935A1 (en)
FR (1) FR2160413B1 (en)
GB (1) GB1400874A (en)
HU (1) HU175863B (en)
IT (1) IT975747B (en)
NL (1) NL158405B (en)
SE (1) SE404882B (en)
SU (1) SU793361A3 (en)
ZA (1) ZA7208125B (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS518868B2 (en) * 1972-12-16 1976-03-22
US3922898A (en) * 1974-03-29 1975-12-02 Wanskuck Co Extrusion process
US3911705A (en) * 1974-04-01 1975-10-14 Wanskuck Co Extrusion apparatus
US3916669A (en) * 1974-11-13 1975-11-04 Western Electric Co Multiple aperture die
US3948079A (en) * 1974-11-13 1976-04-06 Western Electric Company, Inc. Multiple aperture die
US3964283A (en) * 1974-11-13 1976-06-22 Western Electric Company, Inc. Production of multiple elongated products such as wire
US3901065A (en) * 1974-11-13 1975-08-26 Western Electric Co Multiple aperture die
US3924429A (en) * 1974-11-13 1975-12-09 Western Electric Co Method and apparatus for reducing extrusion start-up pressure
US4027511A (en) * 1974-11-13 1977-06-07 Western Electric Company, Inc. Apparatus for producing multiple elongated products such as wires
US4005596A (en) * 1975-04-07 1977-02-01 Ural Viktor Ivanovich Apparatus for hydraulic pressing of metals
US4163377A (en) * 1976-11-10 1979-08-07 Trefimetaux Continuous hydrostatic extrusion process and apparatus
US3985011A (en) * 1975-09-12 1976-10-12 Western Electric Company, Inc. Continuous extrusion
FR2334435B1 (en) * 1975-12-12 1978-05-12 Trefimetaux
US4094178A (en) * 1976-03-08 1978-06-13 Western Electric Co., Inc. Methods for continuous extrusion
US4051705A (en) * 1976-06-24 1977-10-04 Western Electric Co. Die stem heating
US4177658A (en) * 1978-06-08 1979-12-11 Western Electric Co., Inc. Methods and apparatus for continuous extrusion
US4319476A (en) * 1978-07-19 1982-03-16 Western Electric Company, Incorporated Methods and apparatus for extrusion
US4262513A (en) * 1978-10-27 1981-04-21 Bicc Limited Continuous extrusion of metals
US4283931A (en) * 1978-10-27 1981-08-18 Bicc Limited Continuous extrusion of metals
USRE33501E (en) * 1985-05-13 1990-12-25 National Rolling Mills, Inc. Fire-rated beam with expansion relief section
US5327756A (en) * 1991-12-31 1994-07-12 Fox Francis J Method and apparatus for forming spiral grooves internally in metal tubing
DE4402673A1 (en) * 1994-01-29 1995-08-03 Huber & Bauer Gmbh Device for hydroforming

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103309A (en) * 1963-09-10 englund
US1321729A (en) * 1919-05-15 1919-11-11 Simmons Co Tube-drawing apparatus.
GB1177223A (en) * 1966-02-04 1970-01-07 Atomic Energy Authority Uk Improvements in Hydrostatic Extrusion Apparatus
US3440849A (en) * 1966-05-13 1969-04-29 Atomic Energy Authority Uk Hydrostatic extrusion apparatus
DE2065938A1 (en) * 1969-01-28 1977-03-17 Western Electric Co PROCESS FOR CONTINUOUSLY FORWARDING A LONG EXTENDED WORKPIECE OF UNLIMITED LENGTH

Also Published As

Publication number Publication date
NL7215346A (en) 1973-05-21
GB1400874A (en) 1975-07-16
FR2160413A1 (en) 1973-06-29
CH570849A5 (en) 1975-12-31
CA996502A (en) 1976-09-07
NL158405B (en) 1978-11-15
CS212735B2 (en) 1982-03-26
BE790903A1 (en)
HU175863B (en) 1980-10-28
JPS4862655A (en) 1973-09-01
DE2255866C3 (en) 1981-03-12
FR2160413B1 (en) 1976-04-23
BE790903A (en) 1973-03-01
US3740985A (en) 1973-06-26
ZA7208125B (en) 1973-07-25
DE2255866A1 (en) 1973-05-24
SE404882B (en) 1978-11-06
AU4885072A (en) 1974-05-16
DE2255866B2 (en) 1980-07-17
CA996502A1 (en)
JPS5324902B2 (en) 1978-07-24
ES408935A1 (en) 1976-04-01
IT975747B (en) 1974-08-10
JPS52107257A (en) 1977-09-08

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