WO2024104888A1 - Machine de profilage d'extrémité, procédé de profilage d'extrémité d'un filetage et moyen de fixation - Google Patents

Machine de profilage d'extrémité, procédé de profilage d'extrémité d'un filetage et moyen de fixation Download PDF

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Publication number
WO2024104888A1
WO2024104888A1 PCT/EP2023/081320 EP2023081320W WO2024104888A1 WO 2024104888 A1 WO2024104888 A1 WO 2024104888A1 EP 2023081320 W EP2023081320 W EP 2023081320W WO 2024104888 A1 WO2024104888 A1 WO 2024104888A1
Authority
WO
WIPO (PCT)
Prior art keywords
final
thread
final profiling
profiling
sensor
Prior art date
Application number
PCT/EP2023/081320
Other languages
German (de)
English (en)
Inventor
Frank Wagner
Original Assignee
Kamax Holding Gmbh & Co. Kg
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 Kamax Holding Gmbh & Co. Kg filed Critical Kamax Holding Gmbh & Co. Kg
Publication of WO2024104888A1 publication Critical patent/WO2024104888A1/fr

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Classifications

    • 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
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • 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
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • 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
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04—Making by means of profiled-rolls or die rolls
    • B21H3/042—Thread-rolling heads
    • B21H3/044—Thread-rolling heads working axially
    • 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
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other

Definitions

  • the invention relates to a final profiling machine, a method for final profiling a thread and a fastening means.
  • the thread of screws especially high-strength or ultra-high-strength screws, cannot usually be produced using a rolling process, as the forces required for this are usually so high that this could or would lead to damage or even destruction of the rolling tool. Therefore, the threads of screws, especially high-strength or ultra-high-strength screws, are first pre-rolled or pre-profiled before they are tempered if necessary and then finally profiled to form the final thread.
  • the problem with this final profiling of the thread is that the end area of the thread or the thread run-out is not finally profiled. This ultimately leads to this thread area having poorer mechanical properties than the finally profiled area and/or being more susceptible to hydrogen embrittlement.
  • a final profiling machine is provided, wherein the final profiling machine is in particular a thread rolling device.
  • the final profiling machine advantageously has at least two, preferably at least three, final profiling tools and/or a sensor arrangement.
  • the sensor arrangement comprises at least one sensor, wherein the final profiling machine is an infeed or continuous profiling machine, in particular in a tool conveying direction, wherein the final profiling tools are advantageously designed to final profile a thread pre-profile of a blank, wherein at least one sensor is designed such that it detects when the final profiling tools reach the thread run-out of the thread pre-profile of the blank or approach it.
  • the final profiling machine is therefore in particular a machine which serves to form a profile by means of forming, wherein the final profiling machine is advantageously a thread rolling device.
  • the final profiling machine can serve to final profile a thread by forming.
  • Final profiling can be understood in particular as the final rolling of a thread.
  • the final profiling machine has at least two final profiling tools. These final profiling tools are the forming tools for profiling. In particular, these forming tools or final profiling tools can represent or form the profile part of the final profiling tools.
  • the final profiling tool is formed by those components of the final profiling tool which are in engagement with the workpiece during the final profiling process or during the thread rolling process in order to finally profile or finally roll an existing preliminary profile, in particular a thread preliminary profile, of a blank by forming.
  • the final profiling tools can be movable relative to one another. This relative movement can be both a transatlantic movement as well as a rotary movement. Preferably, the rotary relative movement is in the tool conveying direction. Alternatively, the movement of the final profiling tools can be an absolute movement rather than a relative movement.
  • the translational movement can in particular be at least partially parallel to the tool conveying direction.
  • the final rolling is advantageously carried out after a tempering, in particular of the pre-profiled blank.
  • the actual thread production process thus takes place through the final rolling or final profiling of a thread.
  • the entire thread is therefore produced in at least two stages, with the thread pre-profile having a smaller profile depth than that of the standard thread or final thread.
  • the final profiling which as already explained can also be carried out as final rolling, is then carried out in such a way that the depth of the pre-profile thread is increased to the finished thread profile depth.
  • the deformation of the thread during the final profiling or final rolling is sufficient to be able to establish residual stresses in the thread base and thus generate positive mechanical properties.
  • such final profiling or final profiling can also be used to produce a particularly good mechanical properties.
  • Final rolling of the thread can have a positive effect on the material with regard to hydrogen embrittlement.
  • the final profiling tools can in particular be rollers and/or rolling dies. These final profiling tools of the final profiling machine are in particular aligned and/or arranged in such a way that - by moving the final profiling tools relative to one another - the workpiece or blank to be profiled can be run in and/or run through. In other words, the relative movement of the final profiling tools relative to one another can be used to run in or run through the blank between or into the gap between the final profiling tools. In other words, the final profiling machine can therefore be a run-in or continuous profiling machine. This run-in direction is in particular the tool conveying direction.
  • the tool conveying direction is expediently oriented parallel to the longitudinal axis of the blank or the workpiece.
  • An run-in profiling machine can alternatively be understood, preferably in the sense of the invention, to mean that the workpiece or the blank is accelerated or moved in a translation direction by the relative movement of the final profiling tools.
  • This translation direction is in particular the tool conveying direction, in particular the workpiece or blank is pulled or moved between the profiling tools.
  • the final profiling machine also has a sensor arrangement.
  • This sensor arrangement comprises at least one sensor, preferably a plurality of sensors. At least one of the sensors, preferably a plurality of sensors of the sensor arrangement, is or are designed in such a way that it or these detect when the final profiling tools reach the thread run-out of the thread profile of the blank or approach it. Reaching is to be understood here as meaning that all of the thread crests or thread teeth of the thread have been contacted by the final profiling tool or one of the final profiling tools, both on one flank and on the opposite flank, which are thus arranged in a positive tool conveying direction and/or in their negative tool conveying direction in relation to the thread crest or thread tooth.
  • Approaching is understood to mean that the closest contact of one or all of the final profiling tools with the blank and/or the minimum distance between the final profiling tools and one another is a maximum distance of three times the pitch of the thread pre-profile, preferably a maximum of once the pitch of the thread pre-profile, particularly preferably a maximum of 0.2 times the pitch of the thread pre-profile, particularly strongly preferably a maximum of 0.1 times the pitch of the thread pre-profile, and very particularly strongly preferably a maximum of 0.05 times the pitch of the thread pre-profile from the thread run-out.
  • the thread run-out is the run-out of the thread, with the thread run-out in particular forming the end of the thread which is not a free end.
  • the thread run-out is the end of the thread which faces the head.
  • the thread run-out can form the transition between the shaft and the thread, pointing away from the thread, or form the end of the thread oriented in this direction.
  • Sensors can detect that the rolling process must be terminated or should be terminated soon.
  • at least one of the sensors can be a displacement sensor and/or a force sensor.
  • the final profiling tools are preferably rollers, in particular two rollers or three rollers.
  • the final profiling machine can be a two-roller final profiling machine or a three-roller final profiling machine.
  • the final profiling tools can preferably be rolling dies, in particular two rolling dies.
  • the final profiling tools can be rolling dies, a particularly simple and cost-effective final profiling machine can be achieved.
  • At least one of the sensors is an optical sensor or a contactless sensor and/or at least one of the sensors is a mechanical sensor.
  • An optical sensor can be formed, for example, by a laser or a light barrier. The advantage of optical sensors is in particular that they can result in a particularly low-wear design. If one of the sensors is designed as a mechanical sensor, this can reliably detect the approach or reaching of the thread run-out of the thread profile, especially when there is a high degree of contamination.
  • a mechanical sensor can be a load cell, for example.
  • the sensors can also be contactless sensors, in particular capacitive or inductive sensors. These sensors are also particularly low-wear.
  • At least one of the sensors is a position measuring sensor.
  • the sensor can be designed to measure the position of the blank or workpiece in the tool conveying direction. If a If sufficient distancing or displacement in the tool conveying direction has been achieved, this can also be used to detect the approach or reaching of the thread run-out of the thread pre-profile of the blank.
  • a distance measuring sensor can be achieved, for example, by a laser, a capacitive and/or an inductive sensor.
  • the distance measuring sensor can not only interact with the blank in terms of measurement technology, but can be arranged in such a way that it detects a movement of the final profiling tool or the final profiling tools.
  • the senor can therefore indirectly detect the approach or reaching of the thread run-out by the final profiling tools via the tool movement.
  • the sensors in particular the distance measuring sensors, interact directly with a blank in terms of measurement technology.
  • at least one of the sensors advantageously a distance measuring sensor, is arranged in such a way that it interacts or can interact with a blank arranged between the final profiling tools.
  • At least one of the sensors is a force sensor, wherein the force sensor in particular measures a force perpendicular to the tool conveying direction.
  • a force sensor can be implemented, for example, by a load cell or by a strain gauge.
  • the principle of a sensor for signaling a force for detecting the reaching and/or approaching of the thread run-out of the preliminary profile of the blank is based on the fact that in the thread run-out the thread depth of the preliminary profile decreases sharply, so that the forming forces acting on the final profiling tools increase sharply.
  • the force sensor advantageously measures a force perpendicular to the tool conveying direction. This is in particular a particularly simple and reliable implementation of a force-based detection of the reaching or approaching of the thread run-out.
  • the final profiling machine has a control unit, wherein the control unit, depending on a sensor signal of the at least one sensor the sensor unit stops and/or opens and/or separates the or one of the final profiling tools.
  • Stopping is to be understood as meaning that the control unit stops the final profiling tool in its relative movement with respect to the other final profiling tool or in its absolute movement.
  • Separating or opening is to be understood as meaning that an increasing distance arises between the final profiling tools, so that the final profiling tools perform a relative movement or a distancing from one another, in particular perpendicular to the tool conveying direction, when separating or opening.
  • the blank or the workpiece is removed in particular from the space between the final profiling tools, in particular by utilizing gravity and/or an automatic device in the final profiling machine.
  • the final profiling tools when the final profiling tools are opened, the blank or the workpiece can fall out of the final profiling machine.
  • a reverse rotation of the workpiece/blank can also be initiated, in particular by the final profiling tool, in order to remove the workpiece.
  • the final profiling tools are advantageously designed to form a metric thread or another standard thread, in particular an inch thread.
  • the final profiling machine can be used to profile, roll or profile a metric thread. This allows the final profiling machine to be used for a particularly wide range of applications.
  • the final profiling tools for final profiling of a thread are advantageously designed in a high-strength or ultra-high-strength material.
  • the final profiling tools can be designed in such a way that they are able to carry out final profiling or final rolling even with high-strength or ultra-high-strength materials. This can be achieved in particular by suitable hardening of the final profiling tools.
  • a high-strength material is in particular a material whose tensile limit or tensile strength is at least 800 N/mm 2 , preferably at least 1000 N/mm 2 .
  • An ultra-high-strength material has a Tensile limit or a tensile strength of at least 1200 N/mm 2 , preferably of at least 1400 N/mm 2 .
  • the possibility of final profiling or final rolling high-strength or ultra-high-strength materials using the final profiling tools and thus also using the final profiling machine makes them particularly suitable for the production of screws in the strength classes 8.8, 10.9, 12.9 or even 14.8 or 14.9, 15.8U, 15.9U or higher.
  • a further aspect of the invention can relate to a method for final profiling of a thread.
  • the features disclosed in connection with the method can also be part of the final profiling machine, in particular as device features.
  • a device feature of the final profiling machine can also be provided as a method feature in the method for final profiling of a thread.
  • the method for final profiling of a thread can therefore be carried out in particular using a final profiling machine as described above and below.
  • the method for final profiling of a thread comprises in particular the steps:
  • this has the feature that the blank, at least in the area of the thread pre-profile, consists of a high-strength or an ultra-high-strength material or comprises such a material.
  • the final profiling machine can thus final profile a thread which is introduced into a high-strength or an ultra-high-strength material. This makes it particularly suitable for producing screws in high-strength or ultra-high-strength form, in particular in the strength classes 8.8, 10.9, 12.9, 14.8 or 14.9 or even in higher strength classes, in particular 14.9 U.
  • the thread pre-profile was tempered before the final profiling process and pre-profiled before tempering.
  • the invention can therefore relate not only to a process for the final profiling of a thread, but also to a manufacturing process of a fastening means, in particular a screw.
  • a further aspect of the invention can relate to a fastening means, in particular a screw.
  • the thread of the fastening means was produced and/or final-profiled at least in sections, preferably completely, using a method as described above or below.
  • the screw can also have been produced using a final-profiling machine as described above and/or below.
  • Figure 1 shows a final profiling machine or a section of a final profiling machine, with the final profiling tools open
  • Figure 2 shows a final profiling machine, with the final profiling tools brought into contact with the blank.
  • Figure 1 shows a final profiling machine 1 - at least in sections - which has two final profiling tools 10 12.
  • the final profiling tools 10 12 can be flat rolling dies or rollers.
  • the final profiling tools 10 12 are used to final profile or final roll a thread pre-profile.
  • the tool or the blank 40 can be moved in the tool conveying direction L, wherein the tool conveying direction L runs parallel and/or coaxially to the longitudinal direction of the blank 40, which can also be referred to as the workpiece.
  • the final profiling tools 10 12 have already reached the thread run-out 30, so that a control unit (not shown) of the final profiling machine 1 has stopped, separated and opened the final profiling tools 10 12.
  • the final profiling machine 1 has a sensor arrangement 20, which in the example shown only comprises one sensor, which in turn is a force transducer.
  • Figure 2 shows a further embodiment of a final profiling machine 1, wherein in addition a method step of a method for Final profiling of a thread can be seen graphically in Figure 2.
  • the blank 40 has a thread pre-profile 32 which has a thread run-out 30.
  • the blank 40 extends coaxially to the tool conveying direction L, wherein the tool conveying direction L is the direction in which the blank 40 moves due to the movement of one or both final profiling tools 10 12.
  • the final profiling machine 1 has a sensor arrangement 20 which can measure a force perpendicular to the tool conveying direction L and, in addition, the final profiling machine 1 also has a displacement sensor in its measuring sensor arrangement 20 which is an optical sensor, in particular a laser.
  • Figure 3 shows a situation in which the final profiling tools 10, 12 reach or approach the thread run-out 30 of the thread pre-profile 32 of the blank 40. Strictly speaking, therefore, Figure 3 does not show a blank 40, but rather a finished part.
  • the final profiling machine 1 shown in Figure 3 corresponds or can correspond to the embodiment from Figure 2 in a different working position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne une machine de profilage d'extrémité (1), la machine de profilage d'extrémité (1) étant un dispositif de laminage de filets, la machine de profilage d'extrémité (1) comprenant au moins deux outils de profilage d'extrémité (10, 12) et un agencement de capteur (20), l'agencement de capteur (20) comprenant au moins un capteur, la machine de profilage d'extrémité (1) étant une machine de profilage en plongée ou en enfilade, en particulier dans une direction de transport d'outil (L), les outils de profilage d'extrémité (10, 12) étant conçus pour profiler un profil de filetage préliminaire (32) d'une ébauche (40), au moins ledit capteur étant conçu de telle sorte qu'il identifie lorsque les outils de profilage d'extrémité (10, 12) atteignent ou s'approchent du filet incomplet (30) du profil de filetage préliminaire (32) de l'ébauche (40).
PCT/EP2023/081320 2022-11-14 2023-11-09 Machine de profilage d'extrémité, procédé de profilage d'extrémité d'un filetage et moyen de fixation WO2024104888A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022130066.8A DE102022130066A1 (de) 2022-11-14 2022-11-14 Schlussprofiliermaschine, Verfahren zum Schlussprofilieren eines Gewindes und Befestigungsmittel
DE102022130066.8 2022-11-14

Publications (1)

Publication Number Publication Date
WO2024104888A1 true WO2024104888A1 (fr) 2024-05-23

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PCT/EP2023/081320 WO2024104888A1 (fr) 2022-11-14 2023-11-09 Machine de profilage d'extrémité, procédé de profilage d'extrémité d'un filetage et moyen de fixation

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DE (1) DE102022130066A1 (fr)
WO (1) WO2024104888A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3010528A1 (de) * 1979-03-20 1980-10-02 Hartford Special Inc Nachroll-zusatzeinrichtung fuer eine gewinderollmaschine
WO2006083655A1 (fr) * 2005-01-28 2006-08-10 Garver Michael A Filiere pour filetage a double operation de filetage avec correction de diametre majeur
JP2013142471A (ja) * 2012-01-06 2013-07-22 Meidoh Co Ltd ボルトおよびボルトの製造ダイス
EP2792429A1 (fr) * 2013-04-19 2014-10-22 LMT Fette Werkzeugtechnik GmbH & Co. KG Tête axiale à rouler les filets et procédé de formation d'un filetage extérieur sur une pièce à l'aide d'une tête axiale à rouler les filets
EP3130972B1 (fr) * 2015-08-10 2018-05-02 Mico S.r.l. Laminoir amélioré destiné a former des parties filetées sur des corps cylindriques et procédé de formage à asservissement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022197B4 (de) 1990-07-12 2006-09-21 Rollwalztechnik Abele + Höltich GmbH Vorrichtung zum Nachwalzen von Gewinden
WO2002078874A1 (fr) 2001-03-30 2002-10-10 Sundram Fasteners Limited Machine de bobinage de fils permettant d'eliminer le bobinage/travail de composants tamises faiblement/fortement durcis et procede connexe
DE102005014606A1 (de) 2005-03-31 2006-10-05 Richard Bergner Verbindungstechnik Gmbh & Co. Kg Verfahren zur Herstellung eines Befestigungselements sowie Befestigungselement, insbesondere Schraube
DE102018008108A1 (de) 2018-04-13 2019-10-17 Schwer + Kopka Gmbh Ermittlung von Bauteilgeometrie während des Gewinde- bzw. Formwalzprozesses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3010528A1 (de) * 1979-03-20 1980-10-02 Hartford Special Inc Nachroll-zusatzeinrichtung fuer eine gewinderollmaschine
WO2006083655A1 (fr) * 2005-01-28 2006-08-10 Garver Michael A Filiere pour filetage a double operation de filetage avec correction de diametre majeur
JP2013142471A (ja) * 2012-01-06 2013-07-22 Meidoh Co Ltd ボルトおよびボルトの製造ダイス
EP2792429A1 (fr) * 2013-04-19 2014-10-22 LMT Fette Werkzeugtechnik GmbH & Co. KG Tête axiale à rouler les filets et procédé de formation d'un filetage extérieur sur une pièce à l'aide d'une tête axiale à rouler les filets
EP3130972B1 (fr) * 2015-08-10 2018-05-02 Mico S.r.l. Laminoir amélioré destiné a former des parties filetées sur des corps cylindriques et procédé de formage à asservissement

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