EP3700692B1 - Presse multi-étape et procédé de fabrication d'un élément obtenu par formage - Google Patents

Presse multi-étape et procédé de fabrication d'un élément obtenu par formage Download PDF

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Publication number
EP3700692B1
EP3700692B1 EP17816709.4A EP17816709A EP3700692B1 EP 3700692 B1 EP3700692 B1 EP 3700692B1 EP 17816709 A EP17816709 A EP 17816709A EP 3700692 B1 EP3700692 B1 EP 3700692B1
Authority
EP
European Patent Office
Prior art keywords
wire
section
induction coil
length
temperature
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
EP17816709.4A
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German (de)
English (en)
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EP3700692A1 (fr
Inventor
Justus ERHARD
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.)
Nedschroef Herentals NV
Original Assignee
Nedschroef Herentals NV
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 Nedschroef Herentals NV filed Critical Nedschroef Herentals NV
Priority to PL17816709T priority Critical patent/PL3700692T3/pl
Publication of EP3700692A1 publication Critical patent/EP3700692A1/fr
Application granted granted Critical
Publication of EP3700692B1 publication Critical patent/EP3700692B1/fr
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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/022—Special design or construction multi-stage forging presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/56—Making machine elements screw-threaded elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F5/00—Upsetting wire or pressing operations affecting the wire cross-section
    • B21F5/005—Upsetting wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • B21F23/005—Feeding discrete lengths of wire or rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F45/00—Wire-working in the manufacture of other particular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/02—Feeding devices for rods, wire, or strips
    • B21K27/04—Feeding devices for rods, wire, or strips allowing successive working steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/06—Cutting-off means; Arrangements thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K29/00—Arrangements for heating or cooling during processing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F11/00—Cutting wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations

Definitions

  • the invention relates to a multi-stage press for massive forming of a wire section according to the preamble of claim 1.
  • the invention also relates to a method for producing a formed part, in particular a screw, with a multi-stage press according to claim 7 the EP 0 215 338 A1 , CH 346 749 A , which forms the basis for the preamble of claim 1, JP 3 793953 B2 as well as the GB 707 092 A known.
  • a straightened wire is fed from the coil into the machine, where a defined wire section is cut to length.
  • the wire section is conveyed via a gripper of a transfer device to a first forming stage, formed from a die and a punch, where it is positioned in a receptacle of the punch.
  • the wire section is then pushed into the die over the punch and deformed. After the deformation, the deformed piece of wire is positioned in a further gripper of the transport device by means of an ejector pin and transported via this to the next deformation stage.
  • the punches of the forming tools arranged one behind the other are regularly arranged on a common horizontal cylinder, so that a wire section is deformed per advance of this cylinder in each of the forming stages.
  • the wire section is formed into the finished workpiece via the forming steps arranged one behind the other. In the last forming stage, the finished part is ejected.
  • Common multi-stage presses have six forming stages.
  • a wide variety of cold-formed parts such as screws or bolts can be produced by means of a multi-stage press of the aforementioned type.
  • a high process speed can be achieved via the forming steps arranged one behind the other, since six wire sections can be formed with each advance of the cylinder.
  • Forming is problematic with special materials, such as heat-resistant nickel-based alloys (e.g. NI 53 / FE19 / CR19 / NB / MO / TI).
  • NI 53 / FE19 / CR19 / NB / MO / TI heat-resistant nickel-based alloys
  • To manufacture screws from this material it is necessary to remove the area of the screw head in front of it Heat forming up to 1000 ° C. It must be taken into account that the screw shank must remain cold, otherwise the quality of the thread to be subsequently introduced into the screw shank would be the result.
  • blanks are first produced from wire sections, in which an end section is formed into a screw head with prior heating. These blanks are then
  • the invention aims to provide a remedy here.
  • the invention is based on the object of providing a multi-stage press for the massive forming of a wire section, which also enables the production of special screws of the aforementioned type directly from wire coils. According to the invention, this object is achieved by a multi-stage press with the features of claim 1.
  • the invention provides a multi-stage press for the massive forming of a wire section, which also enables the production of special screws of the aforementioned type directly from a wire made of heat-resistant nickel alloy.
  • the fact that means for partial heating of a wire section are arranged on the side of the cutting device opposite the wire feed means that a defined end-side wire section can be heated for the subsequent shaping of the screw head, with the wire being able to be cut to a desired length after the end-side wire section has been heated before it is transported to the first deformation stage via the transfer device.
  • the wire feed, the forming stages (or the cylinder driving the stamps of the forming stages) and the cutting device can be controlled independently of one another A real-time deformation of a wire section heated at the end and then cut to length is enabled over all deformation stages while the next end section is heated at the same time.
  • the means for heating a wire section comprise an induction coil, the wire feed being set up for the temporary introduction of a wire section into the induction coil.
  • the wire feed being set up for the temporary introduction of a wire section into the induction coil.
  • the wire feed includes a servo drive for a defined forward and backward movement of a wire section. This enables the wire to be fed from the coil precisely and as required. The possibility of the defined forward and backward movement of the wire enables the end of the wire to be introduced into the induction coil as well as a subsequent return movement of the wire to determine the wire section to be cut to length.
  • the wire feed can be controlled via a control connected to it, in which a defined dwell time of a wire section in the induction coil and / or a target temperature can be stored.
  • means for detecting the temperature of a wire section located in the induction coil are preferably arranged, which are connected to the controller, a control being integrated into the controller by which the wire feed can be controlled as a function of the temperature of the wire section.
  • control is connected to the cutting device and set up in such a way that after partial heating has taken place at the end a wire section which is cut to length in a defined length.
  • the present invention is also based on the object of providing a method for producing a special screw of the aforementioned type with a multi-stage press directly from the coil. According to the invention, this object is achieved by a method having the features of claim 5.
  • a wire is first heated at the end, then a wire section is cut to length at a defined distance from the heated end and the partially heated wire section obtained in this way is successively fed to several forming stages via a transfer device, enables the length of the screw produced to be individually adjusted.
  • the wire is fed from a coil via a wire feed to an induction coil, where it is heated to a defined temperature at the end.
  • the wire is fed to the induction coil via a servo drive, whereby the wire is fed into the induction coil according to the desired length of the end area to be heated and, after reaching the desired temperature or the required dwell time, is moved out of the induction coil again, after which a wire section is desired Length is cut to length.
  • the temperature of the end region of the wire is measured using a contactless temperature sensor, in particular a pyrometer or also using an infrared measuring device. This further improves the accuracy of the process control.
  • the required dwell time to achieve the desired temperature inside the induction coil can also be determined empirically and stored in a controller connected to the servo drive. That way is the creation of a database with dwell times assigned to corresponding target temperatures in the manner of an expert system is also conceivable.
  • the horizontal multi-stage press 1 chosen as an exemplary embodiment is a horizontal multi-stage press, such as is used for the production of screws and similar small parts.
  • the structure of such horizontal multistage presses is well known to the person skilled in the art and, for example, in US Pat EP 0 215 338 A1 described.
  • the forming tools are arranged next to one another.
  • a cross transfer device brings the workpieces from forming stage to forming stage.
  • These presses usually work with a transverse transport slide, which has a number of transfer grippers corresponding to the number of forming stages, which protrude between the stamping tools and the dies.
  • a detailed description of such a horizontal multi-stage press is therefore not provided at this point.
  • the following Description focuses on the essential components of the multi-stage press according to the invention.
  • FIG. 1 a multi-stage press 1 according to the invention is shown in detail.
  • the die block 11 can be seen with individual deformation stages 12, between which transfer grippers 71 of the transverse transfer device 7 are arranged.
  • a wire feed which is designed as a servo drive 2 in the exemplary embodiment, is arranged in front of the first forming stage 12.
  • the wire feed 2 receives a wire 8 unwound from a coil (not shown).
  • a separately controllable wire cutter 3 for cutting the wire 8 to length is arranged in front of the wire feed 2. Seen from the wire feed 2 behind the wire shears 3, the transfer grippers 71 of the transfer device 7 are positioned, which are set up to receive a wire section 81 cut to length by the wire shears 3.
  • an induction coil 4 is arranged, which is positioned such that a wire picked up by the wire guide 2 can be pushed into the induction coil 4 via the servo drive 21.
  • the wire feed 2, the wire cutters 3 and the induction coil 4 are connected to a control and regulating device 6, which in turn is connected to a pyrometer 5 arranged on the induction coil 4 for measuring the temperature of a wire end section 82 introduced into the induction coil 4.
  • the control and regulating device 6 is also connected to the transverse transfer device 7 for controlling the transfer gripper 71.
  • the control and regulating device 6 is part of the overall machine control - not shown - via which the control of the stamp block - not shown - carrying the individual forming stamps takes place.
  • FIG 2 the process for the production of a high-temperature-resistant screw by forming a wire made of a nickel-based alloy is outlined.
  • a wire 8 is advanced from the coil (not shown) via the wire feed 2 through the wire cutters to the induction coil 4 until a wire end section 82 of a defined length protrudes into the induction coil 4.
  • the temperature is stored in the control and regulation device 6, which also controls the servo drive 21 of the wire feeder 2 ( Figure 2a ).
  • the servo drive 21 is then stopped so that the wire end section 82 remains in the induction coil 4.
  • the temperature of the wire end section 82 is measured continuously via the pyrometer 5. The measured values are reported to the control and regulating device 6, which compares them with the stored target temperature of the wire end section 82 ( Figure 2b ).
  • the servo drive 21 of the wire feeder 2 is controlled in the opposite direction via the control and regulation devices 6, so that the wire 8 is withdrawn through the wire feeder 2 until the wire section 71 located behind the wire cutter 3 the has reached the length stored in the control and regulating device 6 ( Figure 2c ).
  • the wire cutter 3 is now actuated via the control and regulating device 6, as a result of which the wire section 81 is cut to the stored length.
  • the wire section 81 cut to length in this way is picked up by the gripper 71 of the transfer device 7 and transferred to the first forming stage 12 of the die block 11 of the multi-stage press 1.
  • the wire 8 is advanced again in the direction of the induction coil 4 until the wire end section 82 again protrudes into the induction coil 4 in the desired length.
  • the further deformation of the wire section 81 takes place via the further deformation stages 12.
  • the further deformation of the end-heated wire section 81 inserted in the first deformation stage 12 via the deformation steps 12 of the multi-stage press is known to the person skilled in the art and is required Do not provide any further explanation.
  • the drive of the punch block (not shown), which receives the individual forming punches, is mechanically decoupled from the servo drive of the wire feed 2 and also from the drive of the transverse transfer device 7.
  • the multi-stage press according to the invention can be used both for the conventional production of formed parts by means of a continuous cold forming process. For this the wire 8 is immediately advanced so far that a wire section 81 of the desired length is arranged behind the wire cutters 3, after which this wire section 81 is immediately cut to length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Wire Processing (AREA)
  • General Induction Heating (AREA)

Claims (7)

  1. Presse multi-étapes pour le formage dans la masse d'un segment de fil, comprenant une amenée de fil avec dispositif agencé de coupe à la longueur ainsi qu'un dispositif de transfert présentant des grappins pour prendre un segment de fil coupé à la longueur et le transférer vers des étapes de formage suivantes, sachant que l'amenée du fil (2), les étapes de formage (12) et le dispositif de coupe à la longueur (3) peuvent être commandés indépendamment les uns des autres, caractérisée en ce que sur son côté opposé à l'amenée du fil (2), du dispositif de coupe à la longueur (3), sont disposés des moyens pour échauffer partiellement un segment de fil (81), sachant que les moyens pour échauffer partiellement un segment de fil (81) comprennent une bobine d'induction (4), sachant que l'amenée du fil (2) est configurée pour introduire temporairement un segment de fil (81) dans la bobine d'induction (4) et que l'amenée du fil (2) comprend un servomoteur (21) pour exécuter un mouvement défini en marche avant et marche arrière d'un segment de fil.
  2. Presse multi-étapes selon la revendication 1, caractérisée en ce que l'amenée de fil (2) est pilotable via une commande (6) reliée avec cette dernière, commande dans laquelle il est possible de programmer une durée de séjour définie d'un segment terminal de fil (82) dans la bobine d'induction et/ou une température cible.
  3. Presse multi-étapes selon la revendication 2, caractérisée en ce que sont disposés des moyens pour saisir la température d'un segment terminal de fil (82) se trouvant dans la bobine d'induction (4), moyens qui sont reliés à la commande (6), sachant que dans la commande (6) est intégrée une régulation permettant de commander l'amenée de fil (2) en fonction de la température du segment terminal de fil (82).
  4. Presse multi-étapes selon la revendication 2 ou 3, caractérisée en ce que la commande (6) est reliée au dispositif de coupe à la longueur (3) et configurée de sorte qu'après l'échauffement partiel de l'extrémité d'un segment de fil (81), sa coupe à une longueur définie a lieu.
  5. Procédé de fabrication d'un élément obtenu par formage, en particulier d'une vis, avec une presse multi-étapes, sachant que dans un premier temps (8) l'extrémité d'un fil est échauffée, sachant que le fil (8) est amené d'un coil vers une bobine d'induction (4) via un dispositif d'amenée du fil (2), bobine où le segment terminal de fil (82) est échauffé en son extrémité jusqu'à une température définie, sachant que le fil (8) est amené via un servomoteur (21) à la bobine d'induction (4), sachant que le fil (8) est introduit dans la bobine d'induction (4) selon la longueur voulue du segment terminal de fil (82) que l'on veut échauffer, et qu'après avoir atteint la température souhaitée ou la durée de séjour nécessaire à cette fin, il est à nouveau déplacé pour le sortir de la bobine d'induction (4), qu'ensuite un segment de fil (81) de la longueur souhaitée est coupé à la longueur voulue à une distance définie du segment terminal de fil (82) échauffé et que le segment de fil (81) partiellement échauffé ainsi obtenu est amené, via un dispositif de transfert (7), vers plusieurs étapes de formage (12) successives.
  6. Procédé selon la revendication 5, caractérisé en ce que la température du segment final de fil (82) est mesurée via un capteur de température sans contact physique, notamment via un pyromètre (5).
  7. Procédé selon la revendication 5, caractérisé en ce que la durée de séjour nécessaire pour obtenir la température souhaitée à l'intérieur de la bobine d'induction (4) est déterminée empiriquement et qu'elle est programmée dans une commande (6) reliée au servomoteur (21).
EP17816709.4A 2017-12-12 2017-12-12 Presse multi-étape et procédé de fabrication d'un élément obtenu par formage Active EP3700692B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17816709T PL3700692T3 (pl) 2017-12-12 2017-12-12 Prasa wielostopniowa i sposób wytwarzania elementu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/082318 WO2019114929A1 (fr) 2017-12-12 2017-12-12 Presse multi-étage et procédé de fabrication d'un élément obtenu par formage

Publications (2)

Publication Number Publication Date
EP3700692A1 EP3700692A1 (fr) 2020-09-02
EP3700692B1 true EP3700692B1 (fr) 2021-11-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17816709.4A Active EP3700692B1 (fr) 2017-12-12 2017-12-12 Presse multi-étape et procédé de fabrication d'un élément obtenu par formage

Country Status (11)

Country Link
US (1) US11285526B2 (fr)
EP (1) EP3700692B1 (fr)
JP (1) JP7021367B2 (fr)
KR (1) KR102463749B1 (fr)
CN (1) CN111886086B (fr)
BR (1) BR112020011149A2 (fr)
CA (1) CA3084234A1 (fr)
ES (1) ES2903138T3 (fr)
PL (1) PL3700692T3 (fr)
RU (1) RU2741761C1 (fr)
WO (1) WO2019114929A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900018347A1 (it) * 2019-10-09 2021-04-09 Poggipolini S P A Metodo ed impianto per la fabbricazione veloce di elementi di fissaggio

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GB707092A (en) * 1950-09-27 1954-04-14 Johannes Schwarz Methods of manufacturing bolts and the like
CH346749A (de) * 1955-06-15 1960-05-31 Holo Krome Screw Corp Verfahren zur Herstellung von mit einem angestauchten Kopf versehenen Stahlgegenständen aus Draht- oder Stabmaterial durch Kaltschmieden unter Verwendung von Stauchgesenken und Vorrichtung zur Durchführung dieses Verfahrens
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JPS62259634A (ja) 1986-04-03 1987-11-12 Sakamura Kikai Seisakusho:Kk ホーマにおける熱処理加工装置
JPH02307645A (ja) * 1989-05-23 1990-12-20 Kobe Steel Ltd 高強度ボルトの製造方法
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FR3028202B1 (fr) 2014-11-06 2017-10-06 Essilor Int Dispositif d'alimentation d'un dispositif de moulage, ligne de moulage et procede de pilotage de la ligne de moulage

Also Published As

Publication number Publication date
CN111886086A (zh) 2020-11-03
ES2903138T3 (es) 2022-03-31
CA3084234A1 (fr) 2019-06-20
KR102463749B1 (ko) 2022-11-03
RU2741761C1 (ru) 2021-01-28
WO2019114929A1 (fr) 2019-06-20
EP3700692A1 (fr) 2020-09-02
CN111886086B (zh) 2022-07-29
PL3700692T3 (pl) 2022-02-07
KR20200094151A (ko) 2020-08-06
JP7021367B2 (ja) 2022-02-16
BR112020011149A2 (pt) 2020-11-17
US11285526B2 (en) 2022-03-29
US20200298301A1 (en) 2020-09-24
JP2021505408A (ja) 2021-02-18

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