WO2010115405A1 - Procédé de fabrication de matériel tubulaire - Google Patents

Procédé de fabrication de matériel tubulaire Download PDF

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Publication number
WO2010115405A1
WO2010115405A1 PCT/DE2010/000379 DE2010000379W WO2010115405A1 WO 2010115405 A1 WO2010115405 A1 WO 2010115405A1 DE 2010000379 W DE2010000379 W DE 2010000379W WO 2010115405 A1 WO2010115405 A1 WO 2010115405A1
Authority
WO
WIPO (PCT)
Prior art keywords
punch
pipe section
forming
solid material
workpiece
Prior art date
Application number
PCT/DE2010/000379
Other languages
German (de)
English (en)
Inventor
Jörg Klimczak
Original Assignee
Tekfor Cologne Gmbh
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 Tekfor Cologne Gmbh filed Critical Tekfor Cologne Gmbh
Priority to EP10718051A priority Critical patent/EP2416901A1/fr
Publication of WO2010115405A1 publication Critical patent/WO2010115405A1/fr

Links

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
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • 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
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/217—Tube 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
    • B21C26/00—Rams or plungers; Discs therefor
    • 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
    • B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
    • B21C35/02—Removing or drawing-off work
    • 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
    • B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
    • B21C35/02—Removing or drawing-off work
    • B21C35/023—Work treatment directly following extrusion, e.g. further deformation or surface treatment
    • 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
    • B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
    • B21C35/04—Cutting-off or removing waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10—Piercing billets

Definitions

  • the invention relates to a method for producing pipe material. Furthermore, the invention relates to the production of a hollow shaft.
  • Seamless drawn pipe sections for example, for use as waves with comparatively large wall thicknesses can only be made consuming and are correspondingly costly.
  • An alternative production of such pipe sections is therefore by hollow drilling of solid material. In addition to the loss of material occurring, such production processes are time-consuming. Often, such pipe sections are subsequently subjected to other forming processes, e.g. Cold, warm or semi-warm process subjected to their final shape. This may require energy to heat the pipe sections.
  • Patent DE 10 2005 003 933 B4 discloses a mandrel for extruding articles, wherein the mandrel consists of a main and a plurality of inner mandrels, which are axially displaceable to each other.
  • Patent GB 922,794 further discloses a method of making tubes of different wall thicknesses. For this purpose, a mandrel is used, which has sections with different outer diameter.
  • the invention has for its object to propose a manufacturing method with which a cost-effective and rapid production of pipe material or hollow shafts is made possible.
  • the object is achieved by a method for producing pipe material at least consisting of the following method steps:
  • pipe material can be produced in particular in the form of pipe sections by means of a rapid process in large quantities and without large material waste.
  • the introduced in the production of the pipe section in the pipe section heat
  • Forming process is used, so energy is saved.
  • the temporal sequence of the process or process steps and / or the spatial distance of the systems or plant stages used are to be optimized.
  • the next forming step of the pipe section can be done with an additional heating system or without such.
  • the thermal energy present in the pipe section for the additional transformation or it is heated starting from this heat or residual heat from the production of the pipe section of the pipe section, ie it can either be dispensed with the heating of the pipe section or it must at least only a small temperature difference be overcome between the residual heat of the pipe section and the temperature range required for the additional forming.
  • the perforated workpiece can be made of solid material by means of a combined cupping and punching process in an upstream process stage, so that the entire tube material can be produced in a pressing operation, for example on a multi-stage press.
  • a sequence for producing the perforated workpiece made of solid material in an additional tool can comprise the following method steps:
  • the production of the pipe section and the additional forming of the pipe section are preferably carried out in succession on a multi-stage press or in succession on adjacent or connected presses and / or forming systems.
  • the distance between the presses or forming plants or pressing stages and / or the type of transport of the pipe section between the presses or forming equipment or pressing stages should preferably be chosen such that the pipe section does not cool below a predetermined temperature value.
  • the predetermined temperature value-in one embodiment preferably higher than room temperature-is determined here from the temperatures occurring in the production process, the possible cooling by the transition to the additional transformation of the temperature required for the additional forming process and / or one for the heating the tube section for the additional deformation of the tube section available heating device. That is, the spatial distance should be low and the transport time as short as possible, if the goal is to take as much thermal energy in the subsequent forming process.
  • the solid material can be heated before forming and / or after loading.
  • Inductive heating has proven to be advantageous, but other methods are known.
  • This introduced thermal energy can thus also be used preferably in the following forming steps.
  • Under forming conditions without heating ie at room temperature, especially soft, light and non-ferrous metals and their alloys can be used and processed.
  • Steel material is transformed under semi-warm and especially warm conditions, whereby the type of steel and the wall thicknesses to be formed can be decisive for a warm or semi-warm transformation.
  • Outer punch and die against each other can be realized by different pressing arrangements.
  • the press table on which the tool is mounted be displaced.
  • a plurality of pistons acting on the stamp can be operated independently of each other, so that inner punch, outer punch and tool on an imaginary axis of movement are displaced relative to each other simultaneously in different directions of movement.
  • the pipe section is at least partially heated before the additional forming and / or during the forming of the pipe section.
  • additional thermal energy is thus introduced into the pipe section, but due to the utilization of the already introduced in the pipe section by the formation of thermal energy less heating is required.
  • the implementation of the method according to the invention is for example possible by an apparatus for performing the method according to the invention according to at least one of the embodiments described above for the production of pipe material, in particular pipe sections, at least consisting of at least one press and at least one Schopresswerkmaschine, which Feldpresswerkmaschine at least consists of a die with a cylindrical engraving and an axially along the engraving displaceable punch, wherein the punch is made in several parts of an inner mandrel, a coaxially arranged around this inner punch and a coaxially arranged around the inner punch outer punch, and wherein the Die subsequent to the cylindrical engraving has a conical tapering to an outlet radius inlet.
  • the perforated workpieces are formed into a pipe section according to the method given above.
  • the press is at least double-acting.
  • the master press tool can be preceded by a pre-press tool for forming a first press stage, which pre-press tool is formed at least from a second die with a bottom plate with a punched opening and a cylinder wall with a conical tapering towards the bottom plate and a setting die with a coaxially received in this punch ,
  • the punch can be cooled, for example, be water cooled.
  • the resulting forming heat can be dissipated and the dimensional accuracy of the punch can be better guaranteed. So that the temperature loss of the pipe section
  • Transition to the additional forming process is kept low, in one embodiment, either the pressing step of the main pressing tool and an additional Umformstrom additional deformation of the pipe section or the pressing stage of the main press tool and the pressing step for additional deformation of the pipe section appropriately spaced and / or is the transport between the pressing step the main pressing tool and the additional forming system or between the pressing stage of the main pressing tool and the pressing step for additional deformation of the pipe section designed so that the temperature of the pipe section at least before the additional forming above a predetermined value and / or within a predefinable Temperature range is.
  • the path between the forming steps should be small and the transport as fast as possible.
  • the pre-pressing tool is used to prepare and adapt a mass portion made of solid material, for example, by means of a shearing method, to the punched workpiece.
  • setting, cupping and piercing processes take place in the pre-pressing tool.
  • the setting advantageously comprises the embossing of a chamfer. This has a chamfer angle, which substantially already corresponds to the cone angle of the inlet of the main press tool, so that the perforated workpiece can be fitted to the engraving with the inlet of the main tool fitting. It is understood that the diameters of the cylinder walls of the main and pre-pressing tool are substantially identical.
  • a setting punch coaxially receives a punch, takes place over a first partial stroke of the press the cupping by means of the punch with preferably relieved or at least partially relieved setting punch.
  • the punch can be adapted to the Napfvorgang in a corresponding manner.
  • a return flow process takes place, which increases the cylinder length of the workpiece and reduces the perforating process of the punch, which is carried out during the subsequent second partial stroke, and reduces the size of the perforated plug. In particular, during the movement of the punch this is centered guided in the Setzstkov.
  • the thus produced perforated workpiece is in the
  • Main pressing tool further processed.
  • the diameter of the inner mandrel is smaller than the diameter of the punch.
  • the inner mandrel with play in the opening of the workpiece without friction and without problems in possibly existing deviations of the axes of inner mandrel and punch can be moved.
  • Material forward flowing are also displaced radially inward, so that a homogeneous flow of material is achieved.
  • the inner punch To carry out the punching step by means of the inner punch this has substantially twice the exit radius - ie the diameter of the outlet opening - on.
  • the inner punch is formed on the front side accordingly as a punching train. Furthermore, the inner mandrel is centered and guided in the inner punch, so that uniform wall thicknesses can be achieved during the forward hollow extrusion molding.
  • At least the workpiece part to which the press residue adheres can have a cooling device.
  • this may be formed as a separate mold part with a cooling water connection.
  • the displacement of inner punches and outer punches against each other takes place in an advantageous manner by means of a counter-rotating press.
  • a counter-rotating press for example as a hydraulic or mechanical press, it can have two pressure cylinders or pistons which can be operated independently of one another.
  • Such mutually opposite pressure application devices for example, relieve a stamp and pull back, while the other punch is pressurized.
  • opposing pressures can be achieved with pressure by a displaceable punch and additionally by a displaceable press table.
  • the inventive method leads to corresponding pipe material.
  • a material of the pipe material a non-ferrous metal, light metal or their alloys be.
  • these materials can be processed by means of a cold or warm forging process.
  • the use of steel for the production of the tube material is advantageous with the method according to the invention, wherein such materials are preferably processed by means of a hot or semi-warm process.
  • the pipe material is particularly suitable as a semi-finished product for the production of shafts such as transmission shafts, in particular in lightweight construction.
  • the method according to the invention is therefore also directed, for example, to the production of shafts in which the correspondingly produced tube material is processed or is a partial step thereof.
  • the invention moreover achieves the object with a method for producing a hollow shaft, the method at least comprising the following method steps: formation of a pipe section from a perforated workpiece, forming the pipe section at least by utilizing the thermal energy introduced into the pipe section by the formation of the pipe section.
  • the perforated workpiece is in one embodiment, in particular cylindrical.
  • the deformation of the pipe section is preferably carried out in the direction of the hollow shaft form.
  • the method for forming the pipe section and / or for producing the hollow shaft preferably takes place with at least one variant of the method described above.
  • the method is preferably implemented with the apparatus described above.
  • the forming of the pipe section comprises at least the cross wedge rolling, the stretching rolls or an incremental forming process, in particular the rotary kneading or the hammering.
  • the pipe section is at least partially heated before the forming and / or during the forming of the pipe section.
  • FIGS. 1 to 3 a section through a pre-pressing tool at three different processing times
  • FIGS. 4 to 6 a section through a main pressing tool at three different machining times
  • FIGS. 7 a) to d) individual stages in the production of a hollow shaft.
  • Figures 1 to 3 show the Vorpresswerkmaschine 1 with the die 2 with a cylinder wall 3 and a section of a firmly connected to this bottom plate 4.
  • a punched opening 5 is provided in the bottom plate 4.
  • the cylinder wall 3 has a tapering towards the bottom plate 4 toward cone 6 for displaying a chamfer in the perforated workpiece 7.
  • the loading state is shown before the beginning of the pressing process.
  • the solid material 8 for example, a rod portion sheared off a rod material with an inner surface of the cylinder wall 3 corresponding outer diameter - is introduced into the die 2 and is located on the cone 6 at.
  • Figure 2 shows the solid material 8, after it has been set by the setting punch 10 and the chamfer 11 has been formed with a chamfer angle ⁇ .
  • the setting punch 10 is for this purpose by a press not shown in the direction of the arrow 12 and thus pressurized in the direction of the bottom plate 4.
  • the punch 9, which may be water-cooled or otherwise cooled is axially displaceable and centered.
  • a cupping is carried out by means of a displacement of the punch 9 in the direction of the bottom plate 4, wherein the setting punch 10 is switched without pressure.
  • material of the solid material 8 is displaced by backflow.
  • Figures 4 to 6 show the main tool 16 with a multi-part die 17, consisting of a cylinder wall 18, an inlet 19 and an export part 20.
  • the cylinder wall 18 has substantially the same inner diameter as the cylinder wall 3 of the Prepresswerkzeugs 1 of Figures 1 to 3.
  • the inlet 19 has a cone 21, which narrows the inner diameter of the cylinder wall 18 to the diameter of the outlet opening 22 and thus substantially to the outer diameter of the pipe sections to be produced.
  • the cone 21 in this case has a cone angle ⁇ , which essentially corresponds to the chamfer angle ⁇ of the perforated workpiece 7 (see FIG. 4).
  • FIG. 4 shows the main pressing tool 16 with the workpiece 7 inserted at the beginning of the application by the multi-part punch 23
  • Workpiece 7 rests with its chamfer 11 on the cone 21 and is acted upon by the punch 23.
  • the punch 23 is formed from the inner mandrel 24, a coaxial around the axis of symmetry 25 surrounding this outer punch 26 and a both surrounding outer punch 27.
  • the inner mandrel 24 relative to the inner punch 26 and this centered relative to the outer punch 27 and guided axially.
  • the inner mandrel 24 is first displaced axially by the press and axially overlaps the outlet opening 22.
  • the outer diameter of the inner mandrel 24 is adapted to the desired inner diameter of the pipe section to be formed, and the inner diameter of the opening 15 of the workpiece 7 is designed to be larger than the outer diameter of the inner mandrel 24.
  • inner punch 26 and outer punch 27 in the direction of arrows 28, 29 acted upon synchronously by the press and thereby displaced axially.
  • the forward hollow flow process which adjusts thereto presses material of the workpiece 7, supported on the inner mandrel 24, through the outlet opening 22 into the opening 30 provided in the delivery part 22 and opposite the outlet opening 22.
  • FIG. 1 The result of the forward hollow flow process - the blank - is shown in FIG. From the workpiece 7 of Figure 4, a pipe section 31 has formed, which is connected to a remaining in the cone 21 of the inlet 19 Press rest 32.
  • the length of the tube section 31 can be designed by design of pre- and main pressing tool 16 so that the length of the semi-finished product is formed so that one or more finished parts formed by parting can be produced.
  • the outer punch 27 along the arrow 29 is at least partially withdrawn and the inner punch 26 along the arrow 28 in the direction of outlet opening 22 displaced, whereby the pipe section 31 under Reduction of the mass of the pressing residue 32 is further extended until the inner punch 26, the outer diameter of which corresponds substantially to the diameter of the outlet opening 22, the pressing residue 32 separates from the pipe section 31 by passing the outlet opening 22 passes.
  • the inner mandrel 24 can be carried along for the stabilization of the inner punch 26 or pulled out with the outer punch 27.
  • the tube section 31 is subjected to a forming in a further tool or in a further press or in a further pressing step or in a further forming system.
  • the additional forming process is, for example, cross wedge rolling, stretching rolls or an incremental forming process such as rotary swaging or hammering.
  • the temperature of the pipe section 31 in the additional forming process is at least above a predetermined value, which essentially can be dispensed with additional heating of the further to be converted pipe section 31 and wherein the additional heating is less expensive, ie the transport is correspondingly fast and / or the spatial distances are sufficiently small, so that the heating that the pipe section 31 experiences during its production from the tool 7 can be used for the further forming step, either by no additional heating is required, or by starting from the already given heat of the pipe section a small additional heating power is required.
  • Figure 7 a) shows the solid material 8, which has been produced for example by a shearing process. From this solid material 8, the perforated workpiece 7 is generated for example via the pre-pressing tool 1 described (the results of the steps set, cupping and punching shows the figure 7 b)). By means of the described main pressing tool 16 can then be the two states forward hollow extrusion and stamping of Figure 7 c) produce. By utilizing the thermal energy introduced into the pipe section 31 during the production of the pipe section 31, the hollow shaft 33 of FIG. 7 d can then be produced by means of further forming processes. The illustrated hollow shaft 33 was generated for example via the cross wedge rolling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

L'invention concerne un procédé de fabrication de matériel tubulaire et un dispositif à cet effet. La fabrication a lieu au moyen d'un procédé par extrusion de tubes vers l'avant. Selon l'invention, une partie tubulaire (31), qui présente un culot de filage (32), est pressée au moyen d'un poinçon en deux parties (26, 27) et d'un mandrin intérieur (24). Le culot de filage (32) est séparé de la section tubulaire (31) et est éjecté au moyen d'une partie de poinçon (26) de l'outil de pressage (16).
PCT/DE2010/000379 2009-04-07 2010-03-31 Procédé de fabrication de matériel tubulaire WO2010115405A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10718051A EP2416901A1 (fr) 2009-04-07 2010-03-31 Procédé de fabrication de matériel tubulaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009016654.8 2009-04-07
DE102009016654A DE102009016654A1 (de) 2009-04-07 2009-04-07 Herstellungsverfahren von Rohrmaterial

Publications (1)

Publication Number Publication Date
WO2010115405A1 true WO2010115405A1 (fr) 2010-10-14

Family

ID=42289682

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2010/000379 WO2010115405A1 (fr) 2009-04-07 2010-03-31 Procédé de fabrication de matériel tubulaire

Country Status (3)

Country Link
EP (1) EP2416901A1 (fr)
DE (1) DE102009016654A1 (fr)
WO (1) WO2010115405A1 (fr)

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CN103121042A (zh) * 2013-02-06 2013-05-29 和龙双昊高新技术有限公司 铝合金无缝管冷挤成型装置
CN103143581A (zh) * 2013-02-06 2013-06-12 和龙双昊高新技术有限公司 冷状态挤压铝合金型材设备
CN106734806A (zh) * 2016-12-01 2017-05-31 贵州安大航空锻造有限责任公司 1Cr12Ni2WMoVNb钢高筒环件的闭式冲孔方法
CN106734804A (zh) * 2016-12-01 2017-05-31 贵州安大航空锻造有限责任公司 Gh907合金高筒环件的闭式冲孔方法

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CN103240292A (zh) * 2013-04-12 2013-08-14 河南理工大学 一种镁合金薄壁管材的生产方法及装置
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CN106552896A (zh) * 2016-12-01 2017-04-05 贵州安大航空锻造有限责任公司 Gh4169合金高筒环件的闭式冲孔方法
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GB130059A (en) * 1918-01-10 1919-07-31 John Ernest Raworth Improvements in Method of Forming Tubular Articles by Extrusion.
US2045786A (en) * 1934-04-13 1936-06-30 Schloemann Ag Method of making tubes by extrusion
GB922794A (en) 1960-05-12 1963-04-03 Ici Ltd Improvements in or relating to a method of direct extrusion
GB1112322A (en) * 1966-01-25 1968-05-01 Baldwin Lima Hamilton Corp Improvements in the extrusion of tubular products
US3798954A (en) * 1970-11-19 1974-03-26 Kobe Steel Ltd Method and apparatus for producing metal tubes by extrusion of a hollow billet
GB1603653A (en) * 1977-07-14 1981-11-25 Alcan Aluminium Ltd Production of formed metal objects
DE4201746A1 (de) * 1992-01-23 1993-07-29 Peri Gmbh Verfahren zum herstellen von vertiefungen, z. b. gewinden
WO2004022256A1 (fr) * 2002-09-05 2004-03-18 Erbslöh Aktiengesellschaft Procede de fabrication de composants structurels a partir d'un profile extrude
DE102005003933B4 (de) 2005-01-28 2008-02-28 Audi Ag Dorn zum Strangpressen von Gegenständen und Verfahren zur Herstellung eines Strangpressproduktes
WO2010000233A1 (fr) * 2008-07-02 2010-01-07 Tekfor Cologne Gmbh Procédé de production de matériau tubulaire

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US1859707A (en) * 1931-05-29 1932-05-24 Leighton John Wycliffe Means of extruding metal tubes

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Publication number Priority date Publication date Assignee Title
GB130059A (en) * 1918-01-10 1919-07-31 John Ernest Raworth Improvements in Method of Forming Tubular Articles by Extrusion.
US2045786A (en) * 1934-04-13 1936-06-30 Schloemann Ag Method of making tubes by extrusion
GB922794A (en) 1960-05-12 1963-04-03 Ici Ltd Improvements in or relating to a method of direct extrusion
GB1112322A (en) * 1966-01-25 1968-05-01 Baldwin Lima Hamilton Corp Improvements in the extrusion of tubular products
US3798954A (en) * 1970-11-19 1974-03-26 Kobe Steel Ltd Method and apparatus for producing metal tubes by extrusion of a hollow billet
GB1603653A (en) * 1977-07-14 1981-11-25 Alcan Aluminium Ltd Production of formed metal objects
DE4201746A1 (de) * 1992-01-23 1993-07-29 Peri Gmbh Verfahren zum herstellen von vertiefungen, z. b. gewinden
WO2004022256A1 (fr) * 2002-09-05 2004-03-18 Erbslöh Aktiengesellschaft Procede de fabrication de composants structurels a partir d'un profile extrude
DE102005003933B4 (de) 2005-01-28 2008-02-28 Audi Ag Dorn zum Strangpressen von Gegenständen und Verfahren zur Herstellung eines Strangpressproduktes
WO2010000233A1 (fr) * 2008-07-02 2010-01-07 Tekfor Cologne Gmbh Procédé de production de matériau tubulaire

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