WO2019034537A1 - Procédé de fabrication d'un élément actif et élément actif correspondant - Google Patents

Procédé de fabrication d'un élément actif et élément actif correspondant Download PDF

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Publication number
WO2019034537A1
WO2019034537A1 PCT/EP2018/071666 EP2018071666W WO2019034537A1 WO 2019034537 A1 WO2019034537 A1 WO 2019034537A1 EP 2018071666 W EP2018071666 W EP 2018071666W WO 2019034537 A1 WO2019034537 A1 WO 2019034537A1
Authority
WO
WIPO (PCT)
Prior art keywords
active element
thread
internal thread
section
forming step
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.)
Ceased
Application number
PCT/EP2018/071666
Other languages
German (de)
English (en)
Inventor
Klaus Hollmann
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.)
Phoenix Feinbau GmbH and Co KG Vorm Noelle und Berg
Original Assignee
Phoenix Feinbau GmbH and Co KG Vorm Noelle und Berg
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 Phoenix Feinbau GmbH and Co KG Vorm Noelle und Berg filed Critical Phoenix Feinbau GmbH and Co KG Vorm Noelle und Berg
Publication of WO2019034537A1 publication Critical patent/WO2019034537A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/003—Making screw-threads or gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/02—Nuts or like thread-engaging members made of thin sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting

Definitions

  • the invention relates to a method for producing an active element with an internal thread, wherein a tool blank is shaping in at least one forming step and wherein the tool blank is provided in at least one thread forming step with an internal thread.
  • the invention also relates to an active element for producing a semifinished product or end product from a metal sheet, with a mold section for shaping the semifinished product or end product and with a fastening section, wherein the fastening section has at least one internal thread.
  • EP 1 321 202 B1 shows a method of manufacturing a forming tool.
  • a component blank is first introduced between the tool parts of a hydroforming tool.
  • the internal high-pressure forming tool is closed and the component blank is converted into a forming tool by means of a pressure medium.
  • a passage opening in a wall of the forming tool is then punched out.
  • an internal thread is produced in the passage opening.
  • the internal thread is usually the attachment of the newly manufactured forming tool to a machine element. It can be screwed in a simple manner to the machine element.
  • the internal thread is incorporated in the prior art by other tools.
  • EP 1 540 207 B1 discloses a method for producing a spindle nut of a ball screw drive.
  • a punching tool is used with a punch.
  • the punching tool additionally includes a threaded mandrel, wherein the punch in the threaded mandrel is arranged radially displaceable.
  • the punch can be moved radially outward from the threaded mandrel.
  • the starting point is a prefabricated base plate, which consists of a hardened, heat-treated metal, in particular steel, and from which the basic shape of the active element is cut free by means of forming. Subsequently, the workpiece is re-clamped, so that in a second manufacturing step, a bore can be introduced into the workpiece. In a subsequent third manufacturing step, a thread is then cut into the bore, for which at least a renewed change of the tool is required.
  • a disadvantage of the methods known from the prior art is that many different steps are necessary to produce the corresponding component. As a result, the manufacturing process is time-consuming and thus the production of an active element relatively expensive.
  • the present invention is therefore based on the object of specifying a method for producing an active element, by means of which the production time is reduced, so that the productivity can be increased, in particular in the case of the mechanical production of active elements.
  • This object is achieved in the method mentioned in claim 1, characterized in that the internal thread is formed in the thread-forming step as a section thread with threaded portions, so that the internal thread has no full-rotating turns.
  • a thread section is understood to be a thread in which the course of the turns is partially interrupted.
  • the thread partially recesses, or the thread profile is partially interrupted otherwise. The recesses or interruptions extend in the tangential direction.
  • the forming step and the thread-producing step are carried out in a common working step. Since the formation of the section thread is not limited to conventional threading or threading, it is also not necessary that the tool blank be re-clamped for the drilling of an opening and the subsequent forming of the internal thread. In this way, the active element can be molded and provided with an internal thread, without the production process must be interrupted. In a preferred embodiment of the method it is therefore provided that the shaping and the formation of the internal thread are realized in a program sequence of a production machine, without the process having to be interrupted by re-clamping the tool blank.
  • An advantage of this embodiment is therefore that a significant time savings achieved by known from the prior art method becomes.
  • three steps were needed to make an internal threaded actuator. For this purpose, first the contour of the active element had to be formed. Then, after re-clamping the tool blank, a hole had to be made and then a thread formed.
  • the last steps can be omitted and the entire contour of the active element, including the section thread can be manufactured in one step.
  • Another advantage is that not only the overall production time, but also the cycle time is significantly improved. Due to the fact that only one operation is needed for production, waits for other resources such. B- at a milling machine.
  • spark erosion is a thermal, abrasive manufacturing process for conductive materials that relies on electrical discharges (sparks) between an electrode (tool) and a conductive workpiece.
  • the electrode tool is thereby brought to such a narrow gap (for example, 0.004 - 0.5 mm) to the workpiece until a spark turns over, which melts the material punctiform and evaporates.
  • spark erosion drilling, EDM cutting, in which a wire forms the electrode
  • EDM sinking in which the electrode is pushed into the workpiece as a negative mold by means of a spark erosion machine.
  • the thread production step is also carried out by means of spark erosion.
  • both steps that is, the forming step and the thread making step, are performed by the same method.
  • spark erosion as a common step
  • the forming step and the thread forming step may be performed sequentially.
  • wire guides above and below the workpiece guide and support the wire and serve to suppress vibrations. Furthermore, the wire guides serve to have a defined deflection point. Wire eroding has the advantage that it can be automated. Consequently, a tool blank only has to be clamped into the machine once and can then be removed as a finished active element.
  • each threaded section can describe for itself a circular arc whose radius is significantly greater than half the thickness of the active element.
  • the radius of the threaded portions and thus also the diameter of the internal thread is thus largely independent of the thickness of the active element.
  • FIG. 2 shows the active element according to FIG. 1 from the front (from the direction II in FIG. 1), FIG.
  • FIG. 3 shows a further embodiment of an active element from the front (from the direction II in Fig. 1)
  • Fig. 4 is a perspective view of the active element during manufacture
  • Fig. 5 is a longitudinal section through an embodiment of a in one
  • the active element 1 can be divided into a mold section 7 and a fastening section 8.
  • the internal thread 2 is arranged on the attachment section 8, so that the active element 1 can be fastened by means of a screw to a machine.
  • the mold section 7 has a straight edge surface 9, which serves as a support of the formed as a bending punch active element 1 on a workpiece to be machined.
  • the active element 1 is fastened to the fastening section 8 on the machine, whereas the molding section 7 is oriented in the direction of the workpiece to be machined.
  • the active element 1 is made of a prefabricated base plate or Erodierplatte. Therefore, the basic form of the illustrated active element 1 is largely cuboid with rounded edges. In the longitudinal extent of this cuboid shape, the internal thread 2 is on the opposite side the straight edge surface 9 is introduced into the active element 1.
  • the two threaded portions 5 are arranged opposite to each other, so that the threaded portions 5 are arranged on two side surfaces of the active element 1 and between the threaded portions 5, a recess 10 is formed, so that the active element 1 has a total of a U-shape.
  • the mold section 7 is to be regarded as a U-back, whereas the U-legs are formed by the threaded sections 5.
  • FIG. 2 shows the active element 1 according to FIG. 1 from the front, from the direction indicated by II in FIG. 1. Visible is the view of the mounting portion 8 and in the section thread 4. Visible are the two formed as U-legs threaded portions 5 and the turns 6 of the section thread 4. The thread is designed so flat that the turns 6 and the threaded portions. 5 form a straight line and do not describe a circular arc. In other words, the dimension of the radius of the circular arcs (normally) described by the threaded sections 5 approaches infinity.
  • FIG. 3 shows a further exemplary embodiment of an active element 1 from the front, from the direction indicated by II in FIG. 1. Shown is the view of the attachment portion 8 and in the section thread 4.
  • the active element 1 shown here is produced by means of die sinking, a form of spark erosion.
  • the radius R of the circular arcs described by the threaded sections 5 is greater than half the thickness of the active element 1.
  • the radius R of the threaded sections 5 is consequently largely independent of the thickness D of the active element 1 1 can be fastened in this way by means of a much larger screw than would be possible with a hole with a full-circumferential thread, which was produced with a conventional thread forming or threading cutter.
  • even relatively small active elements 1, with a screw with a standard diameter can be attached to a machine, without the need for a special selection of fasteners must be available.
  • FIG. 4 shows a perspective view of the active element 1 during manufacture by means of wire EDM. Shown is the contour of the active element 1 with an internal thread 2, which is produced from a tool blank 3 by means of wire EDM.
  • the tool blank 3 serves as the anode, whereas the thin wire 11 forms the cathode.
  • the wire 11 is pulled through two opposing drive rollers 12, 13 with a defined wire tension and a predetermined speed through the tool blank 3.
  • the contour of the active element 1 including the internal thread 2 can be produced very accurately by wire eroding in one step.
  • the wire EDM is done automatically, so that a previously created 3D drawing of the desired active element 1 can be read into the device for wire EDM.
  • the active element 1 can be made very time-saving and thus low, compared to known methods in which several steps including re-clamping the tool blank are necessary.
  • FIG. 5 shows a sectional view of an active element 1 according to FIG. 1 and FIG. 2 designed as a bending punch, which is fastened with a screw 14 to a machine 15, which is partially shown.
  • the active element 1 is arranged with the fixing portion 8 in a continuous recess 16 in the machine 15.
  • the recess 16 tapers abruptly at one point, so that a stop 17 is formed.
  • the active element 1 can only be introduced into the recess 16 with the attachment section 8 until it abuts against the stop 17.
  • the screw 14 is inserted.
  • the screw 14 can be screwed in this way in the section thread 4 of the active element 1 and ultimately strikes the stop 17 when it is fully screwed into the section thread 4.
  • the active element 1 is not only fixed by the positive connection with the screw 14 on the machine 15, but also by a force or friction fit between the threaded portions 5 of the active element 1 and the wall of the recess 16. In this way the active element 1 securely connected to the machine 15.
  • the screw 14 has a round cross section with fully rotating turns. Since the section thread 4 of the active element 1 is not completely There is also no complete overlap between the internal thread 2 of the active element 1 and the external thread of the screw 14.
  • the overlap angle between the turns 6 of the two threaded sections 5 and the external thread of the screw 14 is in each case a little more than 70 °, so that the overlap angle between the internal thread 2 of the active element 1 and the external thread of the screw 14 in the exemplary embodiment is approximately 140 ° to 150 °. This is sufficient to ensure a secure attachment of the active element 1 by the screw 14 on the machine 15.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Forging (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un élément actif (1) comportant un filetage femelle (2), une ébauche d'outil (3) étant usinée de manière à lui conférer une forme dans au moins une étape de formage et l'ébauche d'outil (3) étant équipée, dans au moins une étape de fabrication de filetage, d'un filetage femelle (2). Le procédé selon l'invention permet de réduire la durée de fabrication de telle sorte que la productivité, en particulier lors de la fabrication à la machine d'éléments actifs, peut être augmentée, en ce que le filetage femelle (2), dans l'étape de fabrication de filetage, est conçu sous la forme d'un filetage de sections (4) comportant des sections de filetage (5), le filetage femelle (2) comportant aucune spire (6) sur toute la périphérie.
PCT/EP2018/071666 2017-08-14 2018-08-09 Procédé de fabrication d'un élément actif et élément actif correspondant Ceased WO2019034537A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2017/5558A BE1025471B1 (de) 2017-08-14 2017-08-14 Verfahren zur Herstellung eines Aktivelements und entsprechendes Aktivelement
BEBE201705558 2017-08-14

Publications (1)

Publication Number Publication Date
WO2019034537A1 true WO2019034537A1 (fr) 2019-02-21

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ID=59790884

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/071666 Ceased WO2019034537A1 (fr) 2017-08-14 2018-08-09 Procédé de fabrication d'un élément actif et élément actif correspondant

Country Status (2)

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BE (1) BE1025471B1 (fr)
WO (1) WO2019034537A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194938A (en) * 1962-10-09 1965-07-13 L C Miller Company Method for producing parts by electrical erosion
US3857349A (en) * 1973-07-19 1974-12-31 Amp Inc Method for fabricating a threaded tap by stamping
JPS6339737A (ja) * 1986-08-04 1988-02-20 Inoue Japax Res Inc ネジ
EP1321202B1 (fr) 2001-12-19 2005-02-16 Bayerische Motoren Werke Aktiengesellschaft Procédé de fabrication et dispositif de formage à haute pression interne pour la mise en oeuvre du procédé de fabrication
EP1540207B1 (fr) 2002-09-17 2011-04-20 Schaeffler Technologies AG & Co. KG Vis d'entrainement a billes et procede de fabrication d'un ecrou destine a une vis d'entrainement a billes
DE102012110986A1 (de) * 2011-11-22 2013-05-23 Audi Ag Gewindeanordnung und Verfahren zum Montieren der Gewindeanordnung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194938A (en) * 1962-10-09 1965-07-13 L C Miller Company Method for producing parts by electrical erosion
US3857349A (en) * 1973-07-19 1974-12-31 Amp Inc Method for fabricating a threaded tap by stamping
JPS6339737A (ja) * 1986-08-04 1988-02-20 Inoue Japax Res Inc ネジ
EP1321202B1 (fr) 2001-12-19 2005-02-16 Bayerische Motoren Werke Aktiengesellschaft Procédé de fabrication et dispositif de formage à haute pression interne pour la mise en oeuvre du procédé de fabrication
EP1540207B1 (fr) 2002-09-17 2011-04-20 Schaeffler Technologies AG & Co. KG Vis d'entrainement a billes et procede de fabrication d'un ecrou destine a une vis d'entrainement a billes
DE102012110986A1 (de) * 2011-11-22 2013-05-23 Audi Ag Gewindeanordnung und Verfahren zum Montieren der Gewindeanordnung

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Publication number Publication date
BE1025471B1 (de) 2019-03-18
BE1025471A1 (de) 2019-03-11

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