EP3083092A2 - Procédé et dispositif de formage de demi-produits d'orientation longitudinale et d'ébauches en matériaux métalliques, notamment en acier - Google Patents

Procédé et dispositif de formage de demi-produits d'orientation longitudinale et d'ébauches en matériaux métalliques, notamment en acier

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Publication number
EP3083092A2
EP3083092A2 EP14837064.6A EP14837064A EP3083092A2 EP 3083092 A2 EP3083092 A2 EP 3083092A2 EP 14837064 A EP14837064 A EP 14837064A EP 3083092 A2 EP3083092 A2 EP 3083092A2
Authority
EP
European Patent Office
Prior art keywords
forming
feed
umformgut
devices
profile
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.)
Withdrawn
Application number
EP14837064.6A
Other languages
German (de)
English (en)
Inventor
Joachim Graefe
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3083092A2 publication Critical patent/EP3083092A2/fr
Withdrawn legal-status Critical Current

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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
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal 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
    • B21C1/27—Carriages; Drives
    • B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive
    • B21C1/305—Linear motor pulling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • 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
    • B21C9/00—Cooling, heating or lubricating drawing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening
    • B21F1/023—Straightening in a device rotating about the wire axis

Definitions

  • the invention relates to a method for forming longitudinally oriented semi-finished products and blanks from metallic materials, in particular steel according to the preamble of claim 1 and a device suitable for carrying out the method according to the preamble of claim 18.
  • profiles in the form of long products in a broad sense all types of semi-finished products made of steel or other metallic materials of the following forms can be considered: cross-sectional shape Round, Kant or flange profile; straight length or wound coils etc., profile or tube, ie with or without cavity. It is independent whether such profiles are produced as semi-finished or as a blank.
  • a profile section will be referred to below as the blank, which goes beyond the usual semifinished products in terms of length, execution of the cutting position or sectional area, the cross-sectional shape or the cross-sectional size along the profile length, as in particular with respect to a variable profile over the profile (in die forging this is referred to as variable mass distribution along the profile length).
  • a classic method of profile forming is the drawing of such profiles through a forming draw die.
  • the drawing of cross sections which are not suitable for drum pulling, is usually done on a drawing bench, a combined drawing machine or a crawler tractor.
  • the drawing is usually done in the cold state of the starting material to increase strength, dimensional and surface quality of the profiles to be produced.
  • the following remarks concentrate on larger, non-co-threadable cross sections.
  • the forming tool is installed in the drawing machine with a tool holder, which can be adjustable.
  • the drawing tool is divided into drawing dies.
  • a pair of jaws in the reversing drawing carriage or paired numerous drawing dies in circulating draw chains cause the sequence grabbing - pulling - open.
  • Drawing benches have a drawing carriage and produce discontinuous straight profiles.
  • the drawing carriage can be guided and driven on one side next to the drawing axis, or bilaterally symmetrical to the drawing axis.
  • the length of the drawing bench and guide ways define the maximum profile length - in industrial applications today the limits are around 20 m.
  • the pulling jaws grip the prefabricated Profile head, also come Flange profiles or pipes usually before the crush zone, so that significant scrap lengths per profile incurred.
  • the reversing of the slide per profile requires high idle times and reduces the performance, because the drawing carriage must reverse empty after pulling a profile. For better performance, some attachments can pull multiple profiles in a game.
  • Drawing benches allow easy machine construction and high pulling forces up to 2 MN. Many foundries invest in multiple plants because of the low unit output and the force limits of each individual plant. Many drive concepts were realized - hydraulic cylinder, hydraulic or electric motor; Power transmission with rod, chain or spindle; Linear actuator.
  • profile alignment is to support the descaling of the surface for steel or other metallic materials and to narrow the dimensional and positional tolerance of the cross sections over the profile length. Serve with the so-called. Roll straightening or other straightening.
  • Roller straighteners straighten the profile by bending transversely to its longitudinal axis.
  • Flank pressure in longitudinal roller contours causes straightening in both transverse axes, e.g. in the transformation of a square profile in a rhombic caliber.
  • Straightening machines with horizontal and vertical straightening machines direct both transverse axes (H-V roller straightening). Additional counter rolls to individual straightening rollers can allow profiling (flange angle correction, bending of partial cross sections around the longitudinal axis) and also improve rod guidance and directivity.
  • Roll Torsionsblack (or Walztordieren). Reversing roller straightening is also known.
  • Oblique roller levelers direct round profiles and allow them to rotate in a continuous cycle (screw feed). Ovalization can contribute to the straightening effect.
  • Smaller round profiles are also processed continuously by means of circulating straightening, again by bending transversely to the longitudinal axis of the profile. Determining the method are upstream and downstream roller drivers or rolling stands for conveying and for absorbing the torsional forces in the profile, and centrally a rotating tool carrier with a plurality of offset against the process axis straightening tools.
  • Circular straightening machines also called wing straightening machines or straightening rotors
  • the rolling of profiles usually produces the same cross-sectional dimensions of the profile over the entire profile length, but also continuous or offset longitudinal profiles are possible in some rolling mills.
  • the field of application of the rolling process is usually in the field of production of wire rod and profiles in straight lengths to short pieces.
  • Various longitudinal rolling methods with and without reversing, with and without a roller train between the stands are well known.
  • a non-continuous mass distribution over the profile length is e.g. produced by stretching rollers or pilgrims.
  • a manipulator conveys and positions the profile - for example, in stretch or pilger rolls. in the empty angle of the roller rotation without Walzguttive.
  • stretch rolling machines a longitudinal roll stand with multiple longitudinal profiling calibres is operated by a carriage that reverses the short piece and transports it across the roll calibers.
  • a longitudinal profile is intermittently rolled in a caliber over a roll circumference and then finished by smoothing.
  • cross rolling for round profiles, e.g.
  • cross wedge rolling preform or finished wave
  • planetary skew rolls copper tubes
  • cross rolls e.g., smoothing rolls
  • From DE 195 44 383 is known e.g. a combined drawing machine with two independently controllable pulling units known, in which the drawing machine can be operated alternately in the form of a combined drawing machine.
  • the drive of the drawing units is force and / or torque-dependent regulated.
  • a disadvantage of this is in particular that this drawing machine is limited in terms of forming forces, since the drawing units only individually attack on the material to be formed.
  • the object of the present invention is therefore to propose a further developed method for forming and a forming machine suitable for this, with which the previous limits of use of corresponding forming methods or forming machines for the production of profiles are overcome.
  • the invention with regard to the forming process is based on a method for forming longitudinally oriented profiles, in particular longitudinally oriented semi-finished products and / or blanks of metallic materials, in particular of steel, in which the longitudinal profile is formed from a starting material by at least one shaping tool in at least one forming stage for which the material to be formed in the form of the starting material (6) and / or of the profile (5) produced in the forming stage (U) relative to the forming tool is a relative movement controlled by at least one feed device. long executes a feed axis.
  • Such a generic method is further developed according to the invention in that at least two independently movable and controllable feed devices before and / or after the forming stage interact with the Umformgut that applied by the feed devices at the same time or substantially alternately time axial forces on the Umformgut and so that axial stresses are exerted on the forming material before and / or in and / or behind the forming zone.
  • Essential to the invention here is that the at least two independently movable feed devices can be controlled so that they apply either at the same time or substantially alternately in time axial forces on the Umformgut.
  • the term "forming material" refers to the starting material and / or the profile produced in the forming step.
  • the axial stresses generated thereby are superimposed in the starting material and therefore allow by increasing the axial forces for the forming, for example, a much higher degree of deformation or larger deformable cross-sections or greater strength of the Umformgutes over the temporally alternating mode of operation.
  • a doubling of the axial forces can be achieved, which substantially increase the deformable cross-sectional dimensions or cross-sectional strengths according to the invention on such a forming device.
  • the range of usable materials and the possible profile specifications, in particular dimensions, cross sections or strengths increases significantly. Since the forming process according to the invention allows the use of a wide variety of forming technologies, a correspondingly working forming machine or forming system can be adapted to a wide variety of manufacturing requirements, for example, by simply exchanging the forming stage against a different forming stage.
  • these basic options are retained for straightening or rolling.
  • at least two feed devices on the inlet and the outlet side can thereby ensure superimposed axial stresses in front of and / or in and / or behind the deformation zone in such a way that a corresponding movement of the feed devices is carried out.
  • axial stresses of two or more co-operating feed devices only on the inlet side or of two or more co-operating feed devices can be superimposed only on the outlet side of the forming device. It is also conceivable that only one feed device on each side or discontinuously works discontinuously.
  • rollers or rollers can also work without their own feed drive.
  • An extension or rolling system extended by feed devices can produce a higher maximum dimension or maximum strength.
  • the straightening and rolling is also more robust against material fluctuations by an option to multiple passes of the formed material produced by the corresponding working forming machine or forming.
  • the continuous process axis for profile conveying can also minimize idle time when changing parts.
  • a tool which can be pivoted about the feed axis of the material to be converted introduces torsional stresses into the material to be formed.
  • a relative to the feed axis of the Umformgutes displaceably arranged tool allow multi-axis rolling or straightening in the forming stage. The combination of such additional stresses makes it possible that a plurality of conceivable transformations of the Umformgutes is carried out simultaneously or successively during a run and thus allows a wide range of transformations of the Umformgutes.
  • the Umformgut cold preferably without external heating or semi-warm, preferably with a heating to below a temperature without a structural change of the Umformgutes or damage to tools, or hot, preferably at hot forming temperature is formed.
  • the forming temperature both the deformation can be facilitated as well as the forming detrimental material properties of the forming material can be positively influenced.
  • the temperature control in the area of the hot forming temperature to have a specific influence on the structure of the starting material or of the profile.
  • the forming temperature is varied between two passes of the Umformgutes.
  • the accuracy-determining transformation e.g. at lower temperatures and thus more closely tolerated Umformparametern.
  • cold drawing, cold setting and cold rolling e.g. Semi-hot or hot processes possible - or even a process sequence hot rolling, cooling, half-warming, with appropriate performance in the cooling bed sequence of a hot forming plant (in-line).
  • the heating of the formed material takes place by means of conductive heating via the feed devices.
  • the feed devices by their direct contact with the Umformgut or the profile directly take over the power supply for the conductive heating and therefore only the parts of the Umformgutes are heated exactly to be transformed in the forming station just.
  • the feed devices controlled depending on the elasticity and the forming process of the Umformgutes a total axial force on the Umformgut and dismantle. As a result, the deformation can be controlled depending on the elasticity of the starting material and thus be transformed more accurately taking into account elongation or elongation effects.
  • Process-related systems can process indefinitely long profiles with wide input tolerances (material analysis, microstructure, cross-section, residual stress state). Narrow target tolerances for cross-sectional dimensions and for low, uniform residual stresses in the finished profile should have the directivity already during the forming process or after roll-integrated straightening passage.
  • the continuous process axis for conveying the profile minimizes idle time during profile changes.
  • the forming stations can be designed conventionally (without superimposed tensile stresses) or lighter and / or shorter (straightening rolls or work rolls of smaller diameter, roll straightening machines with only two opposing straightening triangles, HV rolling blocks shorter by one frame). Roller levelers with counter rollers can take on rolling tasks, especially central rollers with support rollers.
  • a step-by-step forming comprises an intermediate stopping of the starting material or the profile in the unidirectional conveying direction in the form of a "multi-hand reshaping with resetting.”
  • One advancing device or the forming machine keeps the forming material under continuing transverse pressure while another or several other feed devices open If one or more of the reversing feed devices has picked up again, further forming takes place.
  • the method according to the invention makes it possible to transform larger cross sections step by step on a "smaller” machine so that larger cross sections can be formed with "two smaller” feed devices on one or each of both sides of the forming station, or microstages with only one feed device per side .Mideless with only one feed device to be pulled).
  • Continuous forming requires two (or more) feed devices on the ready side, or in other forming processes on the loading and / or unloading side at least two feed devices for conveying and forming without stopping, the so-called "hand-over-hand"
  • the jaws in the feed device open in the empty return path to such an extent that the process axis for the feed device in the load path is free, allowing smaller sections to be processed without any idle time ,
  • An example of this could be: Continuous production in plant with two feed devices on the loading side (1, 2), forming station (U) and two feed devices (3, 4) on the discharge side:
  • Feeding - feed device (1) clamps and feeds the head of the forming material into the forming station (U), forming station (U) closes and positions the forming station
  • Passage - Feed device (1) and feed device (2) alternately: one stretches the starting material (corresponding to reverse tension), the other reverses empty / forming station (U) forms around possibly with a small helix angle, which in the "plastic joints" the "material flow” Signal sends "/ feed device (3) and feed device (4) alternate in parallel, one feed device stretches the starting material (according to feed forward), the other feed device reverses empty /
  • Modified push-in device One or more feed devices or pairs of rollers operate in front of the drawing tool with the purpose of additionally applying an axial tension to the forming zone in the drawing tool - depending on the product, reverse tensile stress or continuous compressive stress after complete penetration.
  • the method according to the invention makes it possible to form reversibly several times products with particularly problematic forming tasks without being dispensed from the forming device, and to reverse the application side and direction of the formed material during full reversing.
  • Reversing straightening or rolling comprises a conveying of the material to be formed by the forming device back and forth - fully reversing with forming or empty reversing without forming, again with or without repositioning.
  • the profile is held after the passage of one or more feed devices - preferably on both sides for axial tension - and the process continues with reversal of the conveying direction with a further passage.
  • Double-sided straightening or rolling presupposes the loading and / or unloading side for at least one feed device.
  • one side may already feed while the other side is discharging.
  • two articles can be produced in a separate material flow without a gap between them. Also, process-related waiting between two passes is industrially achievable.
  • a straightening after rolling is possible if the straightening roller plus counter roll alternatively can be driven as a rolling mill and the plant several Re passes with different forming processes, for example, rolls plus straightening.
  • a forming process change for a profile could be possible.
  • the tools and plant components are to be set up and regulated in succession for each selected method - or to be opened - either in one pass for partial lengths of a profile, or from passage to passage.
  • the invention further relates to a device for forming longitudinally oriented profiles, in particular longitudinally oriented semi-finished and / or blanks of metallic materials, in particular steel, which transforms the longitudinal profile in at least one forming stage of a starting material by at least one forming tool, for which the Umformgut in the form of Starting material and / or the profile produced in the forming stage relative to the forming tool performs a controlled by at least one feed device relative movement, in particular for carrying out the method according to claim 1.
  • At least two independently movable and controllable feed devices are provided which exert axial or substantially temporally alternating axial forces on the forming material before and / or after the forming stage and thus before and / or in and / or behind the forming zone axial stresses in the Cause forming material.
  • the feed devices have clamping devices, in particular clamping jaws, with which they clamp the Umformgut and can exert forces on the Umformgut.
  • clamping devices in particular clamping jaws, with which they clamp the Umformgut and can exert forces on the Umformgut.
  • These can be arranged in such a way to each other and movable in a further embodiment that they can simultaneously attack on the material to be formed or the reshaped profile. This makes it possible to simultaneously transmit the axial forces of two or more feed devices on the Umformgut and thus ready for forming standing axial force, for example when pulling to multiply.
  • the clamping devices axially offset with respect to the feed direction attack each other on the Umformgut.
  • the clamping devices also at the same time or over a longer period during the deformation attack on the Umformgut and can transmit the axial forces.
  • the clamping devices attack axially relative to the feed direction on the same material portion of the Umformgutes.
  • the clamping devices can simultaneously attack quasi the same longitudinal or cross-sectional portion of the Umformgutes and thus initiate the clamping force in a very short longitudinal section of the Umformgutes. This is e.g.
  • the clamping devices are arranged rotated about the feed axis to each other, such as by the clamping means at least two pairs of oppositely arranged jaws, preferably rotated at 90 ° to the feed axis to each other, so that both jaw pairs can simultaneously attack on the same longitudinal portion of the Umformgutes , Arranged in such a nested arrangement, these pairs of jaws can, as it were, move into one another during the axial movement of the associated feed devices and, twisted about the feed axis, engage each other on the same longitudinal section of the material to be formed, where they guide the clamping force multiaxially.
  • the pairs of oppositely arranged jaws are individually radially adjustable so that they can orient the forming material radially relative to the feed direction.
  • This can be a kind Offset of the material to be formed relative to the feed direction are generated by the example, an optimized alignment of the Umformgutes the process axis for a better distribution of Bacaxialkraft or better straightness of the profile is taken care of.
  • Feed device with one, two, three or four adjustable jaws on a carriage with translatory drive. In the case of only one clamping jaw per slide, the process control must couple at least two slides to a feed device system technology.
  • the feed device can carry the actual jaws in contact with the forming material as a tool holder, adapted to the profile or to a profile group, and is e.g. guided as a roller carriage.
  • the translational guide track of the feed device is adjustable for clamping, e.g. by short-stroke cylinder.
  • the translatory axial drive of the feed device e.g. by means of rack and hydraulic motor, preferably with mass balance, can be connected to the guideway, in the carriage or free of both.
  • FIG. 1 shows a schematic representation of a stepwise drawing with at least two feed devices 1, 2 with single drive and practically double axial force
  • FIG. 2 shows continuous drawing with at least two feed devices 1, 2 with individual drive on the same forming device according to FIG. 1,
  • Figure 3b variant of the drawing according to Figure 1, wherein the head of the starting material 6 is conveyed by clamping in the feed device 2 and displacing in the position 2 ' in the forming stage U,
  • Figure 4 rolling straightening or rolling or pulling with counter pull in a forming stage U with at least two feed devices 1, 2 on the inlet side and at least two feed devices 3, 4 on the outlet side for applying a superposed axial tension on the forming material
  • Figure 5 - variant of drawing with retraction, straightening or rolling according to Figure 1 with two feed devices 1, 3 before and after the forming stage U for applying a superposed axial stress on the starting material
  • FIG. 7 shows the method sequence for incremental feed with both feed devices and successive reversing with continued clamping
  • FIG. 9 shows a constructional-schematic implementation of a machine frame and arrangement of the clamping devices for clamping by both feed devices on the same longitudinal section of the material to be converted
  • FIG. 1 shows schematically the actual drawing tool as Umformtre U, the continuous process axis, which is also the longitudinal axis of the starting material 6 and the profile 5, the direction of movement 7 of the feed devices 1, 2 with the arrows behind the forming stage U, and the feed devices 1 and 2.
  • the feed devices 1, 2 two positions are close (1, 2) and removed 2 ') shown for forming stage U - here in a basic arrangement in a row.
  • the feed devices 1, 2 thereby move simultaneously in their positions 1 ' and 2 ' , while they clamp the starting material 6 and reshape. They then successively release the clamping and travel freely back to the starting positions 1, 2.
  • This method of controlling the feed devices 1, 2 makes it possible to transform larger cross sections of the starting material 6 step by step on a "smaller” machine Process larger sections with "two smaller” feed devices 1, 2 on one side (pulling straight lengths without return) to be transformed.
  • a continuous forming in one pass is possible on the same forming device, that according to Figure 2, the two feed devices 1, 2 behind the forming station U (or in other forming processes such as straightening or rolling on loading and / or unloading each at least two Feed devices 1, 2 and 3, 4) alternately clamped with the Umformgut 5, 6 interact.
  • the feed devices 1, 2 change from between load path for forming 7 and reversing 8 as free travel. To open the jaws in the respective feed devices 1 and 2 in the empty return path (position 2 ' to position 2) so far that the feed axis for the other feed device 2 in the load path is free.
  • the reversed feed device 2 clamps the profile 5 again and pulls it further through the forming stage U, while now located in the position ⁇ feed device 1 solves the clamping, opens and reversed to position 1.
  • setting marks can be minimized by full relief by the profile 5 from the other feed device (1 ' , then 2 according to Figure 7) is held stretched to Leer-reversing a feed device (2 *, then 1 * according to Figure 7).
  • FIGS. 3a and 3b show two different variants of the drawing according to FIG. 1, the mode of operation of the feed devices 2, 3 and 4 being enabled by the inventive actuation of the feed devices 2, 3 and 4 on the same forming device.
  • the pulling of the starting material 6 in the forming stage U be effected by one of the feed devices, here the feed device 3 acts as a stationary slide brake and the other feed device 4 by displacement in the position 4 ', the axial force on the profile 5 applies.
  • the feed device 3 acts as a stationary slide brake and the other feed device 4 by displacement in the position 4 ', the axial force on the profile 5 applies.
  • the beginning of the pulling of the starting material 6 can be simplified or secured by a further feed device 2 arranged in front of the forming stage U Beginning of the drawing operation, the head of the starting material 6 by clamping the starting material 6 and displaced to the position 2 ' in the forming stage U promoted and initiates the pulling process with this impact. This can also be done by simple movement control of the feed device 2.
  • the method according to the invention is applied to roll straightening, rolling or circulating straightening.
  • the central forming stage U has a roll straightening machine not shown in detail or a rolling stand or a roll stand group or a rotary straightening machine.
  • the forming stage U is surrounded according to the invention with at least two feed devices 1, 2 on the inlet side and at least two feed devices 3, 4 on the outlet side. These feed devices 1, 2, 3, 4 are used to generate a superimposed axial stress for forming in the forming stage U, are all longitudinally movable, shown with the positions 1 'to 4'.
  • This arrangement can be used to perform a given forming task in particular by superimposing high tensile stress in the forming material 5, 6 with a shorter, lighter, simpler design - up to a straightening or rolling devices without drive.
  • FIG. 5 shows an arrangement of two feed devices 1, 3 before and after the forming stage U, wherein the two feed devices 1, 3 can be used for applying a superimposed axial stress on the Umformgut 5, 6.
  • the two feed devices 1, 3 during their displacement in the positions 1 ' and 3' are not moved exactly the same in the feed direction, so that the axial tension between the feed devices 1 and 3 is higher than between the forming stage U and the feed device. 1
  • the forming process in the forming stage U can be positively influenced.
  • FIG. 5 represents a discontinuous process variant to the process sequence according to FIG.
  • FIG. 6 diagrammatically indicates the possibility that heating of the metal forming material 5, 6 in the region of the forming zone U is specifically effected by means of the feed devices 1, 3, in that a voltage is conductively coupled between the feed devices 1, 3 via flexible lines 10 through which this section can be specifically heated.
  • a voltage is conductively coupled between the feed devices 1, 3 via flexible lines 10 through which this section can be specifically heated.
  • the arrangement of the clamping devices 11, 12 of importance For the simultaneous transmission of the axial forces on the Umformgut 5, 6, the arrangement of the clamping devices 11, 12 of importance.
  • the feed devices 1 and 2 can also move to the same longitudinal position of the profile 5. This is indicated in FIG. 8a, 8b by two pair of jaws 11, 12, which are arranged at 90 ° to each other about the feed axis.
  • the pair of jaws 11 and 12 engage in each other and on the same longitudinal portion of the Umformgutes 5, 6, so that in this cross section, the clamping action (indicated by the radial arrows in Figure 8) acts.
  • the pairs of jaws 11 and 12 and the associated feed devices 1, 2 as described above either both at the same time perform the feed movement 7 (Figure 8a) or alternately as in a combined drawing device work ( Figure 8b), the jaws 11 are solved and eg perform a return stroke 8 in its initial position 1 and 2 and the jaws 12 while the Umformgut 5, 6 keep clamped and execute the feed movement 7.
  • the feed devices 1, 2 can each be guided symmetrically to the feed axis and driven individually.
  • Figure 9 shows for two successively arranged feed devices 1 and 2, a constructive solution, each feed device 1 and 2 assign two guides on two diagonally opposite columns 13 of a 4-column machine frame.
  • the jaws 11 and their clamping movements are marked with two double arrows, for feed device 2, only one jaw 12 is shown in plan view. It can be seen that both feed devices 1 and 2 with clamping movements at 90 ° to each other their jaws 11, 12 can move in the same plane in the longitudinal position (at a suitable low wrap angle of the jaws 11 and 12 to the Umformgut not shown).
  • FIG. 10 shows, on the left in cross section, an approach for the design of the feed devices 1, 2, 3, 4, according to which the main functions "radial clamped “and” move translationally "are separated into two modules, the example of a feed device 1 on a guideway 13.
  • two parallel vertical double arrows indicate the radial position of the guide rail 13, on which the feed device 1 is moved in the axial direction, by a horizontal double arrow indicated.

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  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Metal Extraction Processes (AREA)

Abstract

L'invention concerne un procédé et un dispositif de formage de profilés (5) d'orientation longitudinale, notamment de demi-produits d'orientation longitudinale et/ou d'ébauches en matériaux métalliques, notamment en acier, selon lequel dans au moins une étape de formage (U) le profilé (5) d'orientation longitudinale réalisé dans un matériau de départ (6) est soumis à un formage par au moins un outil de formage, le produit à former se présentant sous la forme du matériau de départ (6) et/ou du profilé (5) obtenu à l'étape de formage (U) effectuant par rapport à l'outil de formage et le long d'un axe d'avancement (9) un déplacement relatif commandé par au moins un dispositif d'avancement (1, 2, 3, 4). Au moins deux dispositifs d'avancement (1, 2, 3, 4) contrôlables et mobiles indépendamment l'un de l'autre interagissent, avant et/ou après l'étape de formage (U), avec le produit à façonner (5, 6) de manière telle que les deux dispositifs d'avancement (1, 2, 3, 4) appliquent simultanément ou sensiblement simultanément des forces axiales alternativement sur le produit à façonner (5, 6) et donc exercent en amont et/ou dans et/ou en aval de la zone de formage (U) des tensions axiales sur le produit à façonner (5, 6).
EP14837064.6A 2013-12-18 2014-12-17 Procédé et dispositif de formage de demi-produits d'orientation longitudinale et d'ébauches en matériaux métalliques, notamment en acier Withdrawn EP3083092A2 (fr)

Applications Claiming Priority (2)

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ITUA20164496A1 (it) * 2016-05-31 2017-12-01 Tecnopress S R L Metodo di trafilatura lineare di filo metallico da matassa con l'impiego di viti a rullo satellite o ricircolo di sfere applicato ad una macchina trafilatrice spezzonatrice lineare

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DE102013021675A1 (de) 2015-07-02
WO2015090270A3 (fr) 2015-08-27
DE112014005942A5 (de) 2016-10-06

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