EP0552713B1 - Tool for rolling threads - Google Patents

Tool for rolling threads Download PDF

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Publication number
EP0552713B1
EP0552713B1 EP93100724A EP93100724A EP0552713B1 EP 0552713 B1 EP0552713 B1 EP 0552713B1 EP 93100724 A EP93100724 A EP 93100724A EP 93100724 A EP93100724 A EP 93100724A EP 0552713 B1 EP0552713 B1 EP 0552713B1
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EP
European Patent Office
Prior art keywords
profile
base body
roller
profile rollers
thread
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.)
Expired - Lifetime
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EP93100724A
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German (de)
French (fr)
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EP0552713A1 (en
Inventor
Helmut Dipl.-Ing. Glimpel
Dietmar Maier
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Emuge Werk Richard Glimpel GmbH and Co KG Fabrik fuer Praezisionswerkzeuge
Original Assignee
Emuge Werk Richard Glimpel GmbH and Co KG Fabrik fuer Praezisionswerkzeuge
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Publication of EP0552713A1 publication Critical patent/EP0552713A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00Making helical bodies or bodies having parts of helical shape
    • B21H3/02Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04Making by means of profiled-rolls or die rolls
    • B21H3/042Thread-rolling heads
    • B21H3/044Thread-rolling heads working axially
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00Making helical bodies or bodies having parts of helical shape
    • B21H3/08Making helical bodies or bodies having parts of helical shape internal screw-threads

Definitions

  • the invention relates to a roller for pressing threads, in which a base body is provided with a device for receiving in a tool holder and carries at least three profile rollers on an end face for threading, which are arranged on a circle at a distance from one another, in which the profile rollers each are on a shaft journal, which is fixed to the base body and is laterally inclined to the central axis by the pitch angle of the thread to be pressed, and in which the profile rollers in the base body are each placed against an axially positioning stop and with the free ends corresponding to the slope of the to be pressed Threads are offset in the axial direction, according to the preamble of claim 1.
  • rollers for pressing external threads are known per se (DE-A-26 33 883).
  • the stops viewed axially, are all arranged at the same height and the offset of the free ends of the profile rollers is achieved by the profile rollers being of different lengths.
  • the offset is necessary because, due to the pitch of the thread to be produced, the profile of each profile roller on the rod piece which is to be provided with the external thread must engage axially at another location. So many different profile rolls have to be manufactured and kept in stock as are provided on the cast iron. This effort due to the offset of the free end of the profile rollers is relatively large.
  • An object of the invention is therefore to provide a roller iron of the type mentioned, in which the axial offset of the free ends of the profile rollers is achieved by the same design of all profile roles in a less expensive manner.
  • the roller iron according to the invention solving this problem, has the characterizing features of patent claim 1.
  • the profile rollers are the same in terms of axial extension and in terms of profile, i.e. are identical, the production and storage of the Profilrollan are less expensive.
  • the required axial offset of the base body stops only requires a relatively small, negligible additional effort in the manufacture of the base body.
  • the profile rolls of a cast iron according to the invention are identical to one another, they can be exchanged for one another as desired. An essential prerequisite has been created in order to develop the roller iron into an inexpensive single-use tool.
  • the profile rollers have circumferential rings and channels or profile ribs and profile gaps as a pressing profile.
  • the inclined arrangement of the profile rollers is provided because of the pitch of the thread to be pressed or generated.
  • the base body has, for example, the outside dimension of a die and can be inserted into the same tool holder as a die.
  • the shaft journals and profile rollers are free-moving at one end, ie are not held by an additional cross piece. This simplifies production, with the aim being a disposable tool, where it is not necessary to change the profile rollers.
  • the shaft journal has a kind of distribution, ie a head that holds the profile roller on the shaft journal.
  • At least four, preferably at least six, profile rollers are provided on the base body. Rollers with more than three profile rolls are now possible with reasonable effort. As a result, external threads that are to be pressed can now be produced with diameters of this type that are much larger than previously. External threads with such large diameters have not previously been pressed with roller dies. The diameter of the profile rollers can be kept relatively small.
  • the diameter of the external thread to be pressed is larger than the diameter of the profile rollers, in particular greater than one and a half times the profile roller diameter. These diameter ratios are primarily useful for more than three profile rolls, it is about pressing external threads with relatively large diameters with relatively small profile rollers.
  • the head holding the profile roller is provided at the free end of the shaft journal and the head is integral with the shaft journal.
  • This one-piece design is advantageous for a one-tool because of its cheapness because the manufacture of the headed shaft plug and the assembly of the roller are simplified.
  • the head is sunk in a hollow of the profile roller. This allows the profile rollers with the pressing profile to be brought closer to an end bend of the rod piece being processed than is possible with an axially projecting head; i.e. the pressed thread can come closer to the end collar. If the head is in one piece with the shaft journal, it does not need to be assembled, which is particularly difficult when the head is arranged in a recessed manner.
  • the base body 1 to 4 serves to press an external thread and has a base body 1 which is circular in cross section and is plate-shaped.
  • the base body 1 is provided on the outer circumference with a device 2 for receiving in a tool holder, which is provided on the lateral surface in the form of countersinks and an axial groove.
  • the circumferential surface merges into an end face 3 via a circumferential rim.
  • the base body 1 has a circular opening 4 in the middle, the diameter of which is at least somewhat larger than the outside diameter of the thread to be produced and which serves to accommodate the rod section which has already been threaded in the machining process.
  • the base body is provided with axially continuous mounting holes 5, which are arranged on a circle.
  • flat stops 6, 7, 8 are formed around the mounting holes 5 by the base body 1, which are recessed or sunk to different depths in the base body 1.
  • the countersink depth is directed counterclockwise.
  • the flat stops 6, 7, 8 are each arranged obliquely with respect to a horizontal, for example the end face 3, so that a perpendicular to the bevel has a lateral inclination with respect to the central axis of the base body. This angle of inclination corresponds approximately to the thread lead angle.
  • the central axis of the mounting holes 5 is inclined to the central axis of the base body 1, the mounting holes extending at right angles to the oblique flat stops 6, 7, 8.
  • each profile roller 9 lies with a lower end face on one of the stops 6, 7, 8 and projects with the profile at least by the depth of the thread to be pressed in the central opening 4 of the base body 1.
  • the center axes of the profile rollers 9 are to the center axis of the base body 1 according to the slope of the stops 6, 7, 8 inclined in the same way as the central axes of the mounting holes 5.
  • the side inclination of the profile rollers 9 is a tangential inclination.
  • the free ends 10 of the profile roller 9 are in the axial direction go offset against each other. This offset is illustrated by FIG. 4.
  • Each profile roller 9 is held on the base body by means of a shaft journal 11, one end piece of which is clamped in a mounting hole 5.
  • the profile roller 9 is rotatably seated with a central bearing bore on the shaft journal 11, which at the upper end integrally carries a head 12 which projects radially on all sides.
  • the head is completely received by a cavity 13, which is provided centrally on an end face of the profile roller 9 and is open on one side in the direction of the central axis of the profile roller.
  • the head 12 is in the cavity 13 of the profile roller 9 rotatably fitted.
  • FIG. 5 is intended for pressing the external thread and has more than three, namely six profile rollers 9, the diameter of which is considerably smaller than the external diameter of the external thread to be pressed.
  • the offset illustrated by FIG. 4 can also be an integral multiple of the profile division.
  • a multi-start thread can be produced with the roller.
  • two or more threads run parallel to each other and the spacing of the tips of two adjacent threads is to be understood by profile division.
  • the roller iron according to FIGS. 6 to 8 is provided for pressing the internal thread and is constructed in the way of the material like the roller iron according to FIGS. 6 to 8 is the lateral inclination, ie the tangential inclination of the profile roller 9 not shown.
  • the profile rollers 9 project radially beyond the base body 1 with respect to its central axis.
  • Fig. 7 shows a tool holder 14 which receives the base body 1 by means of screws 15.

Description

Die Erfindung betrifft ein Rolleisen zum Drücken von Gewinde, bei dem ein Grundkörper mit einer Einrichtung zur Aufnahme in einen Werkzeughalter versehen ist und an einer Stirnfläche zum Gewindedrücken mindestens drei Profilrollen trägt, die auf einem Kreis mit Abstand voneinander angeordnet sind, bei dem die Profilrollen jeweils auf einem Wellenzapfen sind, dem am Grundkörper festgelegt ist und zu dessen Mittelachse um den Steigungswinkel des zu drückenden Gewindes seitlich geneigt ist, und bei dem die Profilrollen beim Grundkörper jeweils gegen einen axial positionierenden Anschlag gelegt und mit den freien Enden entsprechend der Steigung des zu drückenden Gewindes in Achsrichtung versetzt sind, gemäß Oberbegriff des Patentanspruchs 1.The invention relates to a roller for pressing threads, in which a base body is provided with a device for receiving in a tool holder and carries at least three profile rollers on an end face for threading, which are arranged on a circle at a distance from one another, in which the profile rollers each are on a shaft journal, which is fixed to the base body and is laterally inclined to the central axis by the pitch angle of the thread to be pressed, and in which the profile rollers in the base body are each placed against an axially positioning stop and with the free ends corresponding to the slope of the to be pressed Threads are offset in the axial direction, according to the preamble of claim 1.

Rolleisen zum Drücken von Außengewinde sind an sich bekannt (DE-A-26 33 883). Bei einem durch die Praxis bekannten Rolleisen sind die Anschläge, axial gesehen, sämtliche auf gleicher Höhe angeordnet und ist der Versatz der freien Enden der Profilrollen erreicht, indem die Profilrollen verschieden lang ausgebildet sind. Der Versatz ist nötig, weil wegen der Steigung des zu erzeugenden Gewindes das Profil jeder Profilrolle an dem Stangenstück, das mit den Außengewinde zu versehen ist, axial an einer anderen Stelle angreifen muß. Es müssen also soviele verschiedene Profilrollen hergestellt und auf Lager gehalten werden, wie an dem Rolleisen vorgesehen sind. Dieser durch den Versatz des freien Ende der Profilrollen bedingte Aufwand ist relativ groß.Rollers for pressing external threads are known per se (DE-A-26 33 883). In a roller iron known from practice, the stops, viewed axially, are all arranged at the same height and the offset of the free ends of the profile rollers is achieved by the profile rollers being of different lengths. The offset is necessary because, due to the pitch of the thread to be produced, the profile of each profile roller on the rod piece which is to be provided with the external thread must engage axially at another location. So many different profile rolls have to be manufactured and kept in stock as are provided on the cast iron. This effort due to the offset of the free end of the profile rollers is relatively large.

Bei einem bekannten (GB "Machines and Tooling", Volume XLIII No 11, S.54-57) Rolleisen der eingangs genannten Art ist die Profilrolle an dem zugehörigen Wellenzapfen jeweils festgelegt und ist der Wellenzapfen am Grundkörper drehbar gehalten, indem ein Sprengring in eine Nut im Grundkörper und eine Nut im Wellenzapfen greift. Dies ist insofern aufwendig, als die Herstellung der Einheit von Profilrolle und Wellenzapfen aufwendig ist und als die drehbare Montage des Wellenzapfens mittels Nuten und Sprengring aufwendig ist.In a known (GB "Machines and Tooling", Volume XLIII No 11, pp.54-57) roller irons of the type mentioned at the outset, the profile roller is fixed to the associated shaft journal and the shaft journal is rotatably held on the base body by a snap ring in a Groove in the base body and a groove in the shaft journal engages. This is complex in that the manufacture of the unit from the profile roller and the shaft journal is complex and the rotatable assembly of the shaft journal by means of grooves and snap ring is complex.

Eine Aufgabe der Erfindung ist es daher, ein Rolleisen der eingangs genannten Art zu schaffen, bei dem der axiale Versatz der freien Enden der Profilrollen durch gleiche Ausbildung sämtlicher Profilrollen im einer weniger aufwendigen Weise erreicht ist. Das erfindungsgemäße Rolleisen weist, diese Aufgabe lösend, die kennzeichnenden Merkmale des Patentanspruchs 1 auf.An object of the invention is therefore to provide a roller iron of the type mentioned, in which the axial offset of the free ends of the profile rollers is achieved by the same design of all profile roles in a less expensive manner. The roller iron according to the invention, solving this problem, has the characterizing features of patent claim 1.

Da die Profilrollen hinsichtlich der axialen Erstreckung und hinsichtlich des Profils gleich, d.h. identisch ausgebildet sind, sind die Herstellung und Lagerhaltung der Profilrollan weniger aufwendig. Der erforderliche axiale Versatz der Grundkörper-Anschläge macht nur einen relativ geringen, vernachlässigbaren zusätzlichen Aufwand bei der Herstellung des Grundkörpers nötig. Da die Profilrollen eines erfindungsgemäßen Rolleisens einander gleich sind, können sie gegeneinander beliebig getauscht werden. Es ist eine wesentliche Voraussetzung geschaffen, um das Rolleisen hin zu einem preisgünstigen Einwegwerkzeug zu entwickeln.Since the profile rollers are the same in terms of axial extension and in terms of profile, i.e. are identical, the production and storage of the Profilrollan are less expensive. The required axial offset of the base body stops only requires a relatively small, negligible additional effort in the manufacture of the base body. Since the profile rolls of a cast iron according to the invention are identical to one another, they can be exchanged for one another as desired. An essential prerequisite has been created in order to develop the roller iron into an inexpensive single-use tool.

Die Profilrollen weisen als drückendes Profil umlaufende Ringe und Rinnen bzw. Profilrippen und Profillücken auf. Die geneigte Anordnung der Profilrollen ist wegen der Steigung der zu drückenden bzw. zu erzeugenden Gewindes vorgesehen. Der Grundkörper hat z.B. die Außenabmessung eines Schneideisens und läßt sich in die gleiche Werkzaugaufnahme einsetzen wie ein Schneideisen. Bei dem hier zur Rede stehenden Rolleisen sind die Wellenzapfen und Profilrollen einerends freiregend, d.h. nicht durch ein zusätzliches Querstück gehalten. Dies vereinfacht die Herstellung, wobei ein Einwegwerkzeug angestrebt ist, bei dem ein Auswechseln der Profilrollen unnötig ist. Der Wellenzapfen weist am freien Ende eine irgendwie geartete Verbreitung, d.h. einen Kopf auf, der die Profilrolle auf dem Wellenzapfen hält.The profile rollers have circumferential rings and channels or profile ribs and profile gaps as a pressing profile. The inclined arrangement of the profile rollers is provided because of the pitch of the thread to be pressed or generated. The base body has, for example, the outside dimension of a die and can be inserted into the same tool holder as a die. In the case of the roller irons in question, the shaft journals and profile rollers are free-moving at one end, ie are not held by an additional cross piece. This simplifies production, with the aim being a disposable tool, where it is not necessary to change the profile rollers. At the free end, the shaft journal has a kind of distribution, ie a head that holds the profile roller on the shaft journal.

Daß die Wellenzapfen im Grundkörper eingeschoben nur durch Klemmung festsitzen und exzenterfrei gerade ausgebildet sind, ist herstellungsmäßig einfach. Es ist zwar wegen der Exzenterfreiheit und des festen Sitzes deine Einstellbarkeit des Durchmessers des zu drückenden Gewindes gegeben. Dies ist aber bedeutungslos, wenn ein preiswertes Einwegwerkzeug angestrebt ist.The fact that the shaft journals are pushed into the base body only by clamping and are designed to be straight and eccentric is simple in terms of production. Because of the freedom from eccentrics and the tight fit, you can adjust the diameter of the thread to be pressed. However, this is meaningless if an inexpensive one-way tool is sought.

Besonders zweckmäßig und vorteilhaft ist es, wenn mindestens vier, vorzugsweise mindestens sechs Profilrollen am Grundkörper vorgesehen sind. Es sind jetzt Rolleisen mit mehr als drei Profilrollen bei vernünftigem Aufwand möglich. Dadurch lassen sich nun zu drückende Außengewinde mit weit größeren Durchmessern als bisher mittels Rolleisen dieser Bauart herstellen. Außengewinde mit derart großen Durchmessern sind bisher nicht mit Rolleisen gedrückt worden. Dabei kann der Durchmesser der Profilrollen relativ klein gehalten werden.It is particularly expedient and advantageous if at least four, preferably at least six, profile rollers are provided on the base body. Rollers with more than three profile rolls are now possible with reasonable effort. As a result, external threads that are to be pressed can now be produced with diameters of this type that are much larger than previously. External threads with such large diameters have not previously been pressed with roller dies. The diameter of the profile rollers can be kept relatively small.

Besonders zweckmäßig und vorteilhaft ist es ebenso, wenn der Durchmesser des zu drückenden Außengewindes größer als der Durchmesser dar Profilrollen ist, insbesondere größer als der eineinhalbfache Profilrollen-Durchmesser ist. Diese Durchmesserverhältnisse sind primär bei mehr als drei Profilrollen sinnvoll, wobei es darum geht, mit relative kleinen Profilrollen Außengewinde mit relativ großen Durchmessern zu drücken.It is also particularly expedient and advantageous if the diameter of the external thread to be pressed is larger than the diameter of the profile rollers, in particular greater than one and a half times the profile roller diameter. These diameter ratios are primarily useful for more than three profile rolls, it is about pressing external threads with relatively large diameters with relatively small profile rollers.

Eine besonders zweckmäßige und vorteilhafte Ausführungsform der Erfindung liegt vor, Es ist am freien Ende des Wellenzapfens der die Profilrolle haltende Kopf vorgesehen und der Kopf ist mit dem Wellenzapfen einstückig. Diese Einstückigkeit ist ihrer Billigkeit wegen bei einem Einwerkzeug von Vorteil, weil die Herstellung das mit Kopf versehenen Wellenzepfens und der Zusammenbau des Rolleisens vereinfacht sind.A particularly expedient and advantageous embodiment of the invention is available. The head holding the profile roller is provided at the free end of the shaft journal and the head is integral with the shaft journal. This one-piece design is advantageous for a one-tool because of its cheapness because the manufacture of the headed shaft plug and the assembly of the roller are simplified.

Es ist am freien Ende des Wellenzapfens der die Profilrolle haltende Kopf vorgesehen ist und der Kopf ist in einer Höhlung der Profilrolle versenkt angeordnet. Dies läßt es ganz allgemein zu, die Profilrollen mit dem drückenden Profil näher an einen Endbend an den in Bearbeitung befindlichen Stangenstück heranzuführen, als es bei axial vorstehendem Kopf möglich ist; d.h. das gedrückte Gewinde kann näher an den Endbund heranreichen. Wenn der Kopf mit dem Wellenzapfen einstückig ist, braucht er nicht montiert zu werden, was bei versenkter Anordnung des Kopfes besonders schwierig ist.It is provided at the free end of the shaft journal of the head holding the profile roller and the head is sunk in a hollow of the profile roller. This allows the profile rollers with the pressing profile to be brought closer to an end bend of the rod piece being processed than is possible with an axially projecting head; i.e. the pressed thread can come closer to the end collar. If the head is in one piece with the shaft journal, it does not need to be assembled, which is particularly difficult when the head is arranged in a recessed manner.

In der Zeichnung sind bevorzugte Ausführungsformen der Erfindung dargestellt und zeigt

Fig. 1
eine Draufsicht auf ein erstes Rolleisen zum Drücken von Gewinde,
Fig. 2
eine Ansicht des Rolleisens gemäß Pfeil II in Fig, 1,
Fig. 3
eine Ansicht das Rolleisens gemäß Pfeil III in Fig. 1,
Fig. 4
einen schematische Abwicklung des Rolleisens gemäß 1 in einem größeren Maßstab als in Fig. 1,
Fig. 5
eine Draufsicht auf ein zweites Rolleisen zum Drücken von Gewinde,
Fig. 6
eine Draufsicht auf ein drittes Rolleisen zum Drücken von Gewinde,
Fig. 7
einen Schnitt gemäß Linie VII-VII in Fig. 6 und
Fig. 8
eine Unteransicht des Rolleisens gemäß Fig.6.
In the drawing, preferred embodiments of the invention are shown and shows
Fig. 1
a plan view of a first roller for pressing threads,
Fig. 2
2 shows a view of the roller iron according to arrow II in FIG. 1,
Fig. 3
a view of the Rolleisens according to arrow III in Fig. 1,
Fig. 4
1 shows a schematic development of the roller iron according to FIG. 1 on a larger scale than in FIG. 1,
Fig. 5
a plan view of a second roller for pressing threads,
Fig. 6
a plan view of a third roller for pressing threads,
Fig. 7
a section along line VII-VII in Fig. 6 and
Fig. 8
a bottom view of the cast iron according to Figure 6.

Das Rolleisen gemäß Fig. 1 bis 4 dient dem Drücken eines Außengewindes und weist einen Grundkörper 1 auf, der im Querschnitt kreisrund ist und plattenförmig ist. Der Grundkörper 1 ist am Außenumfang mit einer Einrichtung 2 zur Aufnahme in einem Werkzeughalter versehen, die an der Mantelfläche in Form von Ansenkungen und einer axialen Nut vorgesehen ist. Die Mantelfläche geht über eine umlaufende Amfassung in die eine Stirnfläche 3 über. Der Grundkörper 1 weist mittig einen kreisrunden Durchbruch 4 auf, dessen Durchmesser mindestens etwas größer als der Außendurchmesser des zu fertigenden Gewindes ist und der zur Aufnahme des im Bearbeitungsprozeß bereits mit Gewinde versehenen Stangenabschnittes dient. Weiterhin ist der Grundkörper mit axial durchgehenden Halterungsbohrungen 5 versehen, die auf einam Kreis angeordnet sind.1 to 4 serves to press an external thread and has a base body 1 which is circular in cross section and is plate-shaped. The base body 1 is provided on the outer circumference with a device 2 for receiving in a tool holder, which is provided on the lateral surface in the form of countersinks and an axial groove. The circumferential surface merges into an end face 3 via a circumferential rim. The base body 1 has a circular opening 4 in the middle, the diameter of which is at least somewhat larger than the outside diameter of the thread to be produced and which serves to accommodate the rod section which has already been threaded in the machining process. Furthermore, the base body is provided with axially continuous mounting holes 5, which are arranged on a circle.

An der einen Stirnfläche 3 sind rund um die Halterungensbohrungen 5 vom Grundkörper 1 flächige Anschlage 6, 7, 8 gebildet, die verschieden tief in den Grundkörper 1 eingelassen bzw. versenkt sind. Es sind drei Anschläge 6, 7, 8 vorgesehen, vom denen der eine nur wenig versenkt ist, der, bei Draufsicht bei zu fertigendem rechtsinnigem Gewinde im Uhrzeigersinn betrachtet, nachfolgende um ein Drittel der Gewindesteigung tiefer versenkt ist und der nachfolgende Dritte um zwei Drittel der Gewindesteigung noch tiefer versenkt ist. Bei Festigung von linkssinnigen Gewinden ist die Versenkungstiefe entgegen dem Uhrzeigersinn gerichtet. Die flächigen Anschläge 6, 7, 8 sind jeweils bezüglich einer Waagerechten, z.B. der Stirnfläche 3, schräg angeordnet, so daß eine Rechtwinkelige zu der Schräge gegenüber der Mittelachse des Grundkörpers eine seitliche Neigung aufweist. Dieser Neigungswinkel entspricht im etwa dem Gewindesteigungswinkel. Im gleicher Weise ist die Mittelachse der Halterungsbohrungen 5 zu der Mittelachse des Grundkörpers 1 geneigt, wobei die Halterungsbohrungen rechtwinkelig zu dem schrägen flächigen Anschlägen 6, 7, 8 verlaufen.On one end face 3, flat stops 6, 7, 8 are formed around the mounting holes 5 by the base body 1, which are recessed or sunk to different depths in the base body 1. There are three stops 6, 7, 8, one of which the one is sunk only a little, which, viewed from the top when the right-hand thread is to be produced, looks clockwise, the subsequent one is sunk lower by one third of the thread pitch and the following third is sunk even lower by two thirds of the thread pitch. When tightening left-handed threads, the countersink depth is directed counterclockwise. The flat stops 6, 7, 8 are each arranged obliquely with respect to a horizontal, for example the end face 3, so that a perpendicular to the bevel has a lateral inclination with respect to the central axis of the base body. This angle of inclination corresponds approximately to the thread lead angle. In the same way, the central axis of the mounting holes 5 is inclined to the central axis of the base body 1, the mounting holes extending at right angles to the oblique flat stops 6, 7, 8.

Es sind drei gleiche Profilrollen 9 vorgesehen, die in ihrer Achsrichtung gleichlang sind und ein gleiches Profil vom in sich geschlossen umlaufenden Profilrippen und Profillücken aufweisen. Jede Profilrolle 9 liegt mit einer unteren Stirnfläche am einem der Anschläge 6, 7, 8 und ragt mit dem Profil mindestans um die Tiefe des zu drückenden Gewindes im dem mittigen Durchbruch 4 des Grundkörpers 1. Die Mittelachsen der Profilrollen 9 sind zur Mittelachse des Grundkörpers 1 entsprechend der Schräge der Anschläge 6, 7, 8 im gleicher Weise geneigt wie die Mittelachsen der Halterungsbohrungen 5. Bei der Seitenneigung der Profilrollen 9 handelt es sich um eine tangentiale Neigung. Ensprechend der verschieden großen Versenkung der Anschläge 6, 7, 8 sind die freien Enden 10 der Profilrolle 9 in Achsrichtung gehen gegeneinander versetzt. Dieser Versatz wird durch Fig 4 verdeutlicht.There are three identical profile rollers 9 which are of equal length in their axial direction and have the same profile of the self-contained circumferential profile ribs and profile gaps. Each profile roller 9 lies with a lower end face on one of the stops 6, 7, 8 and projects with the profile at least by the depth of the thread to be pressed in the central opening 4 of the base body 1. The center axes of the profile rollers 9 are to the center axis of the base body 1 according to the slope of the stops 6, 7, 8 inclined in the same way as the central axes of the mounting holes 5. The side inclination of the profile rollers 9 is a tangential inclination. Corresponding to the different sized countersinking of the stops 6, 7, 8, the free ends 10 of the profile roller 9 are in the axial direction go offset against each other. This offset is illustrated by FIG. 4.

Jede Profilrolle 9 ist am Grundkörper mittels eines Wellenzapfens 11 gehalten, dessen eines Endstück in einer Halterungsbohrung 5 klemmend festsitzt. Die Profilrolle 9 sitzt mit einer mittigen Lagerungsbohrung drehbar auf dem Wellenzapfen 11, der am oberen Ende einstückig einem Kopf 12 trägt, der radial allseits vorspringt. Der Kopf ist vollständig von einer Höhlung 13 aufgenommen, die an einer Stirnseite der Profilrolle 9 mittig vorgesehen ist und in der Richtung der Mittelachse der Profilrolle einseitig offen ist. Der Kopf 12 ist im die Höhlung 13 der Profilrolle 9 drehlagernd genau eingepaßt.Each profile roller 9 is held on the base body by means of a shaft journal 11, one end piece of which is clamped in a mounting hole 5. The profile roller 9 is rotatably seated with a central bearing bore on the shaft journal 11, which at the upper end integrally carries a head 12 which projects radially on all sides. The head is completely received by a cavity 13, which is provided centrally on an end face of the profile roller 9 and is open on one side in the direction of the central axis of the profile roller. The head 12 is in the cavity 13 of the profile roller 9 rotatably fitted.

Das Rolleisem gemäß Fig. 5 ist zum Drücken vom Außengewinde vorgesehen und weist mehr als drei, nämlich sechs Profilrollen 9 auf, deren Durchmesser beachtlich kleiner als der Außendurchmesser des zu drückenden Außengewindes ist. Der durch Fig. 4 verdeutlichte Versatz kann auch ein ganzzahliges Vielfaches der Profilteilung sein. In diesem Fall läßt sich ein mehrgängiges Gewinde mit dem Rolleisem herstellen Bei einem mehrgängigan Gewinde verlaufen zwei oder mehr Gewindegänge parallel zueinander und ist unter Profilteilung der Abstand der Spitzen zweier benachbarter Gewindegänge voneinander zu verstehen.5 is intended for pressing the external thread and has more than three, namely six profile rollers 9, the diameter of which is considerably smaller than the external diameter of the external thread to be pressed. The offset illustrated by FIG. 4 can also be an integral multiple of the profile division. In this case, a multi-start thread can be produced with the roller. In the case of a multi-start thread, two or more threads run parallel to each other and the spacing of the tips of two adjacent threads is to be understood by profile division.

Das Rolleisen gemäß Fig. 6 bis 8 ist zum Drücken vom Innengewinde da vorgesehen umd im wessenlichen so aufgebaut wie das Rolleisen gemäß Fig. 1 bis 4, weshalb auf die diesbezügliche Beschreibung verwiesen wird. In Fig. 6 bis 8 ist die seitliche Neigung, d.h. die tangentiale Neigung der Profilrolle 9 nicht gezeigt. Die Profilrollen 9 ragen über den Grundkörper 1 bezüglich dessen Mittelachse radial hinaus. Fig. 7 zeigt einen Werkzeughalter 14, der dem Grundkörper 1 mittels Schrauben 15 aufnimmt.The roller iron according to FIGS. 6 to 8 is provided for pressing the internal thread and is constructed in the way of the material like the roller iron according to FIGS. 6 to 8 is the lateral inclination, ie the tangential inclination of the profile roller 9 not shown. The profile rollers 9 project radially beyond the base body 1 with respect to its central axis. Fig. 7 shows a tool holder 14 which receives the base body 1 by means of screws 15.

Claims (3)

  1. A rolling tool for rolling threads, wherein a base body (1) is provided with a means for holding it in a tool holder and bears on one outside face for rolling threads at least three profile rollers (9) arranged on a circle at a distance apart from one another, wherein each profile roller (9) is rotatable and is provided on a shaft journal (11) which is held axially on the base body (1) and is inclined laterally relative to the central axis thereof by the pitch angle of the thread to be rolled, wherein the shaft journals (11) are inserted in the base body (1) and are designed so as to be non-eccentric, wherein the profile rollers (9) on the base body (1) are located against respective axially positioning stops (6,7,8), and the free ends of the said profile rollers are staggered in the axial direction in conformity with the pitch of the thread to be rolled, and wherein the positioning stops (6,7,8) are staggered in the axial direction in conformity with the pitch of the thread to be rolled, all the profile rollers (9) being identical in design, characterized in that the profile rollers (9) are respectively rotatable on the associated shaft journal (11) which is fixedly located on the base body (1), a head (12) holding the profile rollers (9) being provided on the free end of each shaft journal (11), in that each head (12) is as one piece with the shaft journal (11) and is arranged so as to be recessed in a cavity (13) of the profile roller (9), and in that the shaft journals (11) are tightly seated in the base body (1) by means of gripping only.
  2. A rolling tool according to claim 1, characterized in that at least four, preferably at least six profile rollers (9) are provided on the base body (1).
  3. A rolling tool according to claim 1 or 2, characterized in that the diameter of the external thread to be rolled is greater than the diameter of the profile rollers (9), more particularly greater than one and a half times the profile roller diameter.
EP93100724A 1992-01-21 1993-01-19 Tool for rolling threads Expired - Lifetime EP0552713B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4201446A DE4201446A1 (en) 1992-01-21 1992-01-21 ROLLER BAR TO PRESS THREAD
DE4201446 1992-01-21

Publications (2)

Publication Number Publication Date
EP0552713A1 EP0552713A1 (en) 1993-07-28
EP0552713B1 true EP0552713B1 (en) 1996-06-05

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Application Number Title Priority Date Filing Date
EP93100724A Expired - Lifetime EP0552713B1 (en) 1992-01-21 1993-01-19 Tool for rolling threads

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EP (1) EP0552713B1 (en)
DE (2) DE4201446A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2792429B1 (en) 2013-04-19 2016-12-14 LMT Fette Werkzeugtechnik GmbH & Co. KG Axial thread rolling head and method for forming an external thread on a workpiece with an axial thread rolling head
CN103341578A (en) * 2013-07-29 2013-10-09 曹立峰 Selection method for upper and lower transmission wheels of automatic rib stripping thread roller

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB567700A (en) * 1943-09-11 1945-02-27 Nino Bonamini Improved tool for forming external screw threads
SU115164A1 (en) * 1957-05-25 1957-11-30 Д.З. Краснопольский Thread rolling dies
DE1225136B (en) * 1963-02-25 1966-09-22 Sawod Freser Thread rolling head for rolling threads on thin-walled workpieces, especially on pipes
CH582028A5 (en) * 1974-09-05 1976-11-30 Lechot Andre Thread cutting tool for small screws - has each cutter rotating on spindle with out head, giving longer threaded portion

Also Published As

Publication number Publication date
EP0552713A1 (en) 1993-07-28
DE59302770D1 (en) 1996-07-11
DE4201446A1 (en) 1993-07-22

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