EP3341146B1 - Düsenringe mit ultraschallvibration - Google Patents

Düsenringe mit ultraschallvibration Download PDF

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Publication number
EP3341146B1
EP3341146B1 EP15770586.4A EP15770586A EP3341146B1 EP 3341146 B1 EP3341146 B1 EP 3341146B1 EP 15770586 A EP15770586 A EP 15770586A EP 3341146 B1 EP3341146 B1 EP 3341146B1
Authority
EP
European Patent Office
Prior art keywords
end surface
die
die ring
mounting tube
ring
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.)
Active
Application number
EP15770586.4A
Other languages
English (en)
French (fr)
Other versions
EP3341146A1 (de
EP3341146B8 (de
Inventor
Miles ASHCROFT
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.)
Magnaparva Packaging Ltd
Original Assignee
Magnaparva Packaging 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 Magnaparva Packaging Ltd filed Critical Magnaparva Packaging Ltd
Priority to PL15770586T priority Critical patent/PL3341146T3/pl
Publication of EP3341146A1 publication Critical patent/EP3341146A1/de
Application granted granted Critical
Publication of EP3341146B1 publication Critical patent/EP3341146B1/de
Publication of EP3341146B8 publication Critical patent/EP3341146B8/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21C1/006—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing using vibratory energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • 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
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/04—Dies; Selection of material therefor; Cleaning thereof with non-adjustable section
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • 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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/008—Processes combined with methods covered by groups B21D1/00 - B21D31/00 involving vibration, e.g. ultrasonic
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B21D51/2638—Necking

Definitions

  • the invention relates to a die and a method according to the preambles of claims 1 and 4.
  • a die and method are for example disclosed in US-A-4854149 .
  • Such a die can be used in an apparatus for forming metal workpieces by driving the workpieces into the die. It has particular application to annular workpieces that commonly have circular symmetry about the axis of movement, whereby the forming process changes the longitudinal profile of the workpiece, for example to form a neck of reduced radius and predetermined shape.
  • US patent 4,854,149 (Porucznik et al. ) illustrates examples of such an ultrasonically-assisted forming process.
  • the end of the workpiece to be formed is inserted coaxially into the profiled aperture of a die ring.
  • a transducer is attached to the die ring at a location on its circumference and delivers ultrasonic energy into the die ring.
  • the transducer vibrates along its own longitudinal axis, which is aligned with a radius of the die ring.
  • the radial application of ultrasonic vibrations to the die ring induces resonant modes of vibration, depending on the shape and material of the die ring and the frequency applied.
  • the die ring is mounted on a forming machine via a mounting tube that is coaxial with the die ring.
  • the die ring needs to be mounted firmly enough to withstand the high forces exerted on it during the forming of a metal workpiece, while allowing it to vibrate as freely as possible at the applied frequency. It is desirable to minimize the transmission of vibrations from the die ring into the mounting tube, both because this causes energy to be lost from the die ring and because it may interfere with the desired mode of vibration of the die ring.
  • the pure radial mode R0 cannot generally be achieved at suitable frequencies and within the typical space constraints of a die in a forming machine.
  • the die ring can readily be induced to vibrate in a "radial bending" mode termed "RB0", which is schematically illustrated in Figures 1A to 1C.
  • Figure 1A shows a simple, hollow cylinder in its resting state. Because the harmonic number is zero, this mode continues to display circular symmetry about the axis of the ring, whereby in ideal circumstances the contact between the working surface of the die ring and the workpiece is synchronous around any given circumference.
  • the expansion and contraction are also substantially synchronous along the axis of the die ring. However, the amplitude of the vibration is not uniform along the axis.
  • the component oscillates between an hourglass shape ( Figure 1B ) and a barrel shape ( Figure 1C ) over a cycle of the vibration, passing through approximately its original cylindrical configuration ( Figure 1A ) at the midpoint between each of these two extremes.
  • Figure 1B the annular end surface of the component bulges outwards in a convex cone
  • Figure 1C the annular end surface of the component sinks inwards in a concave cone.
  • the shape of the end surface in these configurations is not necessarily a true cone, i.e. a plane containing the axis may intersect the end surface in a curved line rather than a straight line.
  • the invention provides a die, comprising:
  • the invention also provides a method of operating a die that comprises a generally cylindrical die ring having an end surface; and a mounting tube coaxial with the die ring and extending from the end surface.
  • the method comprises vibrating the die ring in a radial bending (RB0) mode, in which the end surface of the die ring oscillates between a concave and a convex state, characterized in that the minimum amplitude of the oscillation of the end surface occurs at a radius where the mounting tube joins the end surface.
  • RB0 radial bending
  • the radius of the mounting tube joins the end surface of the die ring at a radius where the amplitude of the oscillation is at a minimum, the undesired transmission of vibrational energy from the die ring into the mounting tube can be reduced.
  • Figure 1D schematically shows the end wall of the component of Figure 1A at the two extremes of its vibration in the radial bending mode RB0.
  • Dotted lines 30 show the component in its "hourglass” configuration, corresponding to Figure 1B .
  • Solid lines 32 show the component in its "barrel” configuration, corresponding to Figure 1C . It can be seen that the movement of any point on the surface of the end wall between the two extremes is principally in a direction parallel to the axis 34.
  • a point P on the radially outer part of the end surface moves between a greater axial elongation in the barrel configuration and a smaller axial elongation in the hourglass configuration, while a point Q on the radially inner part of the end surface does the opposite, oscillating 180° out of phase with the outer part.
  • the amplitude of the oscillation of the end surface must be at a minimum.
  • the movement of the points on the end surface is not in general purely axial - there is also a radial component - but it is still true that at an intermediate radius there exists a circle of points on the end surface where the amplitude of the oscillation of the points is at a minimum.
  • the amplitude may be defined in various ways. Preferably, it is the straight-line distance between the corresponding points at the two extremes of the oscillation. Alternatively, the amplitude may be measured along the path that a point on the surface follows between those two extremes. Another possibility is to measure only the component of the movement parallel to the axis. If preferred, the amplitude may be defined as one half of any of the aforementioned values, to conform to the conventional definition for a waveform; this makes no difference to identifying the radius at which the minimum value occurs.
  • FIGS 2A, 2B and 3 illustrate a die 1 according to an embodiment of the present invention.
  • the die 1 incorporates a die ring 2 that defines a central axis 3.
  • the die ring 2 is formed integrally with a resonant mounting tube 4.
  • the mounting tube 4 is coaxial with the die ring 2 and extends axially from an end surface 5 of the die ring 2.
  • Part way along the tube 4 is a radially projecting flange 6, which is used for mounting the die 1 on a forming machine (not shown) to support the die ring in use.
  • the section of the tube 4 between the die ring 2 and the flange 6 is thin-walled so as to be relatively flexible and to minimize the coupling of the vibration of the die ring 2 into the tube 4.
  • the die ring 2 has a central aperture 8 that opens to the axial end remote from the mounting tube 4.
  • the interior wall of the aperture 8 defines a working surface 10 that is profiled to form a tubular workpiece (not shown) as it is driven into the aperture against the working surface 10.
  • the die ring 2 is vibrated ultrasonically to assist the forming process.
  • the outer surface 12 of the die ring 2 is generally cylindrical. At one point on its circumference there is formed a planar surface, parallel to the axis, that acts as an interface 14 for an ultrasonic transducer (not shown).
  • the interface surface 14 has a threaded bore 16 in its centre for receiving a stud (not shown) that is used to secure the transducer.
  • the shape and material of the die ring 2 are chosen such that, when an ultrasonic transducer is coupled to the interface 14 and introduces energy at a predetermined frequency, the die ring 2 vibrates in the previously described radial bending mode RB0. During this vibration, the end surface 5 oscillates between a convex and a concave configuration as illustrated in Figure 1D .
  • the radius R of the mounting tube 4 where it joins the end surface 5 is equal to the radius where the amplitude of this oscillation of the end surface 5 is at a minimum. More precisely, the circle of points on the end surface where the oscillation is a minimum lies within the thickness of the wall of the mounting tube.
  • the vibration modes of the die ring 2 can be considered independently from those of the mounting tube 4.
  • the mounting tube 4 joins the end surface 5 of the die ring 2 where the amplitude of vibration is at a minimum so it is desirable to design the mounting tube 4 such that at the operating frequency the vibration of the mounting tube 4 is also at a minimum at that junction.
  • the mounting tube 4 typically vibrates in an axisymmetric mode with nodes and antinodes of vibration distributed along its length.
  • a node of the mounting tube preferably coincides with the junction of the mounting tube and the die ring so that the amplitude of vibration is at a local minimum there.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (4)

  1. Form (1), die aufweist:
    einen im Wesentlichen zylindrischen Formring (2), der eine Endfläche (5) aufweist und einen radialen Biege(RB0)-Schwingungsmode aufweist, in dem die Endfläche zwischen einem konkaven und einem konvexen Zustand hin- und herschwingt; und
    ein Montagerohr (4), das zu dem Formring (2) koaxial ist und sich von der Endfläche (5) des Formrings (2) aus erstreckt;
    dadurch gekennzeichnet, dass das Montagerohr (4) mit der Endfläche (5) des Formrings (2) an einem Radius verbunden ist, an dem die Amplitude der Schwingung der Endfläche (5) minimal ist.
  2. Form (1) nach Anspruch 1, wobei die Endfläche (5) ringförmig ist.
  3. Form (1) nach Anspruch 1 oder Anspruch 2, wobei bei der Frequenz des radialen Biegemodes (RB0) des Formrings (2) das Montagerohr (4) in einem Mode schwingt, in dem die Schwingungsamplitude an der Verbindungsstelle zwischen dem Montagerohr und dem Formring ein lokales Minimum aufweist.
  4. Verfahren zum Betreiben einer Form (1), die einen im Wesentlichen zylindrischen Formring mit einer Endfläche (5) und ein Montagerohr (4) aufweist, das zu dem Formring (2) koaxial ist und sich von der Endfläche (5) aus erstreckt;
    wobei das Verfahren ein In-Schwingung-Versetzen des Formrings (1) in einem radialen Biege(RB0)-Mode aufweist, in dem die Endfläche (5) des Formrings (2) zwischen einem konkaven und einem konvexen Zustand hin- und herschwingt, dadurch gekennzeichnet, dass die minimale Amplitude der Schwingung der Endfläche (5) an einem Radius auftritt, an dem das Montagerohr (4) mit der Endfläche (5) verbunden ist.
EP15770586.4A 2015-08-27 2015-08-27 Düsenringe mit ultraschallvibration Active EP3341146B8 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15770586T PL3341146T3 (pl) 2015-08-27 2015-08-27 Ultradźwiękowo poddawane drganiom pierścienie matrycy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB2015/052486 WO2017032959A1 (en) 2015-08-27 2015-08-27 Ultrasonically vibrated die rings

Publications (3)

Publication Number Publication Date
EP3341146A1 EP3341146A1 (de) 2018-07-04
EP3341146B1 true EP3341146B1 (de) 2019-08-28
EP3341146B8 EP3341146B8 (de) 2019-10-02

Family

ID=54196990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15770586.4A Active EP3341146B8 (de) 2015-08-27 2015-08-27 Düsenringe mit ultraschallvibration

Country Status (7)

Country Link
US (1) US20180326468A1 (de)
EP (1) EP3341146B8 (de)
BR (1) BR112018003915A2 (de)
ES (1) ES2759350T3 (de)
MX (1) MX2018002475A (de)
PL (1) PL3341146T3 (de)
WO (1) WO2017032959A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109622656A (zh) * 2018-11-10 2019-04-16 江苏兴达钢帘线股份有限公司 一种可提高胶管抗疲劳性的钢丝的生产工艺

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206304B (en) 1987-06-30 1991-07-03 Metal Box Plc Method and apparatus for reducing the mouth of a tubular body.
GB8906998D0 (en) 1989-03-28 1989-05-10 Metal Box Plc Maintaining preferred vibration mode in an annular article
DE10132990C1 (de) * 2001-07-02 2003-02-13 Forschungsges Umformtechnik Axiale Abstützung für eine im Ultraschallbereich in Eigenfrequenz schwingende Matrize, insbesondere zum Draht-, Stangen- oder Rohrziehen
DE10161250B4 (de) * 2001-12-13 2004-05-06 Daimlerchrysler Ag Verfahren zum mechanischen Fügen von Blechen
JPWO2015025769A1 (ja) * 2013-08-22 2017-03-02 昭和電工株式会社 金属加工用ダイ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2759350T3 (es) 2020-05-08
MX2018002475A (es) 2019-01-10
EP3341146A1 (de) 2018-07-04
US20180326468A1 (en) 2018-11-15
WO2017032959A1 (en) 2017-03-02
BR112018003915A2 (pt) 2018-09-25
PL3341146T3 (pl) 2020-06-15
EP3341146B8 (de) 2019-10-02

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