EP0417416A2 - Axial thread rolling head - Google Patents

Axial thread rolling head Download PDF

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Publication number
EP0417416A2
EP0417416A2 EP90112909A EP90112909A EP0417416A2 EP 0417416 A2 EP0417416 A2 EP 0417416A2 EP 90112909 A EP90112909 A EP 90112909A EP 90112909 A EP90112909 A EP 90112909A EP 0417416 A2 EP0417416 A2 EP 0417416A2
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EP
European Patent Office
Prior art keywords
thread
rolling head
thread rolling
axial thread
eccentric
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.)
Withdrawn
Application number
EP90112909A
Other languages
German (de)
French (fr)
Other versions
EP0417416A3 (en
Inventor
Uwe Schunk
Wolfgang Hahn
Eberhart Krueger
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.)
Fette GmbH
Original Assignee
Wilhelm Fette GmbH
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 Wilhelm Fette GmbH filed Critical Wilhelm Fette GmbH
Publication of EP0417416A2 publication Critical patent/EP0417416A2/en
Publication of EP0417416A3 publication Critical patent/EP0417416A3/en
Withdrawn legal-status Critical Current

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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
    • B21H3/04—Making by means of profiled-rolls or die rolls
    • B21H3/042—Thread-rolling heads
    • B21H3/044—Thread-rolling heads working axially

Definitions

  • the innovation relates to an axial thread rolling head which is provided with thread rollers which are adjustable at a distance from one another and which are rotatably mounted on eccentrics, which are each carried by a bearing pin.
  • Such rolling heads are used in particular for producing threads on screws or other workpieces, such as angular or T-shaped connecting pieces, the legs of which are designed as shafts to be provided with a thread.
  • the thread rolling head is fed axially to the workpiece or the workpiece is axially inserted into the thread rolling head when a thread is rolled.
  • the thread rolls are mounted so as to be adjustable radially or transversely to one another.
  • the thread rolls sit on eccentrics that are supported by bearing bolts.
  • the bearing bolts are mounted on both sides of a thread roll, on the one hand in the housing of the thread rolling head and on the other hand in a front plate which is on the side of the threaded bushing facing away from the housing and is connected to the housing of the rolling head by spacing screws.
  • a front plate instead of such a front plate, however, other holders of thread rolls are also possible, in which, however, the eccentric of a thread roll is also supported at both ends.
  • the known thread rolling heads of the type described above generally have the disadvantage that when rolling a thread on a workpiece shank, the thread cannot be rolled up to a base body adjoining the shank, but only up to a distance which corresponds at least to the thickness of the front plate , provided that the base body adjoining the shank of the workpiece has a larger diameter than the shank.
  • such workpieces can be provided with a thread that almost reaches the base body if an eccentric is designed as an end journal of a bearing pin and is only supported on one side, that is to say, in contrast to known arrangements, not on two sides.
  • the innovation eliminates the front plate previously considered necessary, the thickness of which reduced the possible thread length to be produced or other mounts on the side of a thread roller facing away from the housing.
  • the eccentric is preferably connected to a bearing pin, which is held in the housing of the rolling head by two adjacent pivot bearings, which are preferably axially spaced from one another and are designed as needle bearings, in order to also absorb the load from higher torques in a compact design can.
  • the axial thread rolling head 1 shown in the drawing is provided for its clamping in a machine tool with a shaft 2 which carries a plate 5.
  • a housing 3 is connected to the plate 5 by screws 6.
  • adjustable bearing bolts 30 are provided, each of which is rotatably held about its axis 41 by two needle bearings 44 and 46 which are axially spaced from one another.
  • the adjustable bearing bolts 30 each have an eccentric pin 31 on which a threaded roller 32 with a rotary bearing 13 is mounted.
  • the thread rolls32 are interchangeable.
  • Screws 33 are provided for their mounting, which extend through a cover 34 into a threaded bore of an eccentric pin 31.
  • the screws 33 are arranged centrally to the eccentric pin 31, so that their axis 42 and thus the axis of the eccentric pin 31 is slightly offset from the axis of rotation 41 of a bearing pin 30. By rotating the bearing pin 30, the center distance of the threaded rollers 32 can therefore be adjusted.
  • a plate-shaped collar 40 at the rear end of a bearing bolt 30, which is supported on the housing 3, and an axial bearing 26 on the rear side of the thread rollers 32 also serve to secure and support the thread rollers 32.
  • the workpiece 60 When rolling a thread 63 on a workpiece 60, the workpiece 60 is either fed axially to the thread rolling head 1 or the thread rolling head 1 is fed axially to the workpiece according to the arrow 51. If either the thread rolling head 1 or the workpiece 60 is set in rotation, then a thread is produced with the thread 50 of the individual thread rollers 32 on a threaded connection 61 of the workpiece, which extends almost directly to the base body 62 in a length of L 1, whereby only a very narrow remaining distance L2 remains relative to the base body 62, so that the thread is longer and closer to the base body 62 than in a known axial thread rolling head, in which the thread rollers 32 are also mounted on their side facing away from the housing 3.

Abstract

The axial thread rolling head (1) is provided with thread rolls (32) which can be adjusted to a mutual spacing and are rotatably mounted on eccentric journals (31) carried by bearing pins (30). Known thread rolling heads of this kind have the disadvantage that, when rolling a thread on a workpiece, the thread cannot be rolled right up to an adjoining basic body but only up to a certain distance therefrom. In order to remedy this disadvantage, an eccentric (31) is designed as an end journal of a bearing pin (30) and, instead of being supported on two sides, is supported on only one side. <IMAGE>

Description

Die Neuerung betrifft einen Axialgewinderollkopf, der mit im Abstand zueinander verstellbaren Gewinderollen versehen ist, die drehbar auf Exzentern gelagert sind, welche jeweils von einem Lagerbolzen getragen sind. De­rartige Rollköpfe werden insbesondere angewandt zum Her­stellen von Gewinden auf Schrauben oder anderen Werk­stücken, wie beispielsweise winkelförmigen oder T för­migen Verbindungsstücken, deren als Schäfte ausgebilde­ten Schenkel mit einem Gewinde versehen werden soll. Da­für wird der Gewinderollkopf zum Werkstück axial zuge­führt bzw. das Werkstück beim Einrollen eines Gewindes axial in den Gewinderollkopf eingeführt. Um nach der Herstellung eines Gewindes das Werkstück dem Rollkopf entnehmen zu können, aber auch um Gewinde unterschiedli­cher Durchmesser rollen zu können, sind die Gewinderol­len radial bzw. queraxial zueinander verstellbar gela­gert. Dafür sitzen die Gewinderollen auf Exzentern, die von Lagerbolzen getragen sind.The innovation relates to an axial thread rolling head which is provided with thread rollers which are adjustable at a distance from one another and which are rotatably mounted on eccentrics, which are each carried by a bearing pin. Such rolling heads are used in particular for producing threads on screws or other workpieces, such as angular or T-shaped connecting pieces, the legs of which are designed as shafts to be provided with a thread. For this purpose, the thread rolling head is fed axially to the workpiece or the workpiece is axially inserted into the thread rolling head when a thread is rolled. In order to be able to remove the workpiece from the rolling head after the production of a thread, but also to be able to roll threads of different diameters, the thread rolls are mounted so as to be adjustable radially or transversely to one another. For this, the thread rolls sit on eccentrics that are supported by bearing bolts.

Bei bekannten Axialgewinderollköpfen sind die Lagerbol­zen zu beiden Seiten einer Gewinderolle gelagert und zwar einerseits im Gehäuse des Gewinderollkopfes und an­derenends in einer Frontplatte, die auf der dem Gehäuse abgewandten Seite der Gewinderdllen steht und durch Dis­tanzschrauben mit dem Gehäuse des Rollkopfes verbunden ist. Anstelle einer solchen Frontplatte sind jedoch auch andere Halterungen von Gewinderollen möglich, bei denen jedoch ebenfalls der Exzenter einer Gewinderolle beide­nends gelagert ist.In known axial thread rolling heads, the bearing bolts are mounted on both sides of a thread roll, on the one hand in the housing of the thread rolling head and on the other hand in a front plate which is on the side of the threaded bushing facing away from the housing and is connected to the housing of the rolling head by spacing screws. Instead of such a front plate, however, other holders of thread rolls are also possible, in which, however, the eccentric of a thread roll is also supported at both ends.

Die bekannten Gewinderollköpfe der vorbeschriebenen Art haben allgemein den Nachteil, daß beim Rollen eines Ge­windes auf einem Werkstückschaft das Gewinde nicht bis unmittelbar an einen an den Schaft anschließenden Grund­körper heranreichend gerollt werden kann, sondern ledig­lich bis auf einen Abstand, welcher zumindest der Dicke der Frontplatte entspricht, sofern der an den Schaft des Werkstückes anschließende Grundkörper einen größeren Durchmesser als der Schaft aufweist.The known thread rolling heads of the type described above generally have the disadvantage that when rolling a thread on a workpiece shank, the thread cannot be rolled up to a base body adjoining the shank, but only up to a distance which corresponds at least to the thickness of the front plate , provided that the base body adjoining the shank of the workpiece has a larger diameter than the shank.

In der Praxis besteht vielfach ein Bedürfnis danach, bei Werkstücken das Gewinde so lang auszubilden, daß es bis unmittelbar an den Grundkörper heranreicht, wie bei­spielsweise bei sogenannten Fittings, das heißt Rohrver­bindungsstücken, die winkelförmig oder T förmig ausge­bildet sind und deren rohrförmigen Schenkel, welche au­ßen mit einem Gewinde versehen werden sollen, mit einem Grundkörper verbunden sind, der einen größeren Durchmes­ ser aufweist als die einzelnen Schenkel.In practice, there is often a need for the thread on workpieces to be long enough to reach the base body directly, such as in the case of so-called fittings, that is, pipe connectors that are angular or T-shaped, and their tubular legs, which are on the outside are to be provided with a thread, are connected to a base body which has a larger diameter ser than the individual legs.

Gemäß der Neuerung können derartige Werkstücke mit einem bis nahezu unmittelbar an den Grundkörper heranreichen­den Gewinde versehen werden, wenn ein Exzenter als ein Endzapfen eines Lagerbolzens ausgebildet ist und nur einseitig, das heißt im Gegensatz zu bekannten Anordnun­gen nicht zweiseitig gelagert ist. Damit entfällt bei einem Axialgewinderollkopf nach der Neuerung die bisher für notwendig angesehene Frontplatte, deren Stärke die herzustellende mögliche Gewindelänge verminderte oder andere Halterungen auf der dem Gehäuse abgewandten Seite einer Gewinderolle.According to the innovation, such workpieces can be provided with a thread that almost reaches the base body if an eccentric is designed as an end journal of a bearing pin and is only supported on one side, that is to say, in contrast to known arrangements, not on two sides. Thus, in the case of an axial thread rolling head, the innovation eliminates the front plate previously considered necessary, the thickness of which reduced the possible thread length to be produced or other mounts on the side of a thread roller facing away from the housing.

Bei dem neuartigen Gewinderollkopf ist der Exzenter vor­zugsweise mit einem Lagerbolzen verbunden, welcher im Gehäuse des Rollkopfes durch zwei nebeneinanliegende Drehlager gehalten ist, die vorzugsweise im axialen Ab­stand zueinander stehen und als Nadellager ausgebildet sind, um bei kompakter Bauweise auch die Belastung durch höhere Drehmomente aufnehmen zu können.In the novel thread rolling head, the eccentric is preferably connected to a bearing pin, which is held in the housing of the rolling head by two adjacent pivot bearings, which are preferably axially spaced from one another and are designed as needle bearings, in order to also absorb the load from higher torques in a compact design can.

Ein Ausführungsbeispiel der Neuerung ist nachstehend un­ter Bezugnahme auf eine Zeichnung gezeigt. Darin zeigen:

  • Figur 1: einen Axialgewinderollkopf in der Vorderansicht
  • Figur 2: einen Axialgewinderollkopf im Längsschnitt und
  • Figur 3: ein bearbeitetes Werkstück.
An embodiment of the innovation is shown below with reference to a drawing. In it show:
  • Figure 1: an axial thread rolling head in the front view
  • Figure 2: an axial thread rolling head in longitudinal section and
  • Figure 3: a machined workpiece.

Der in der Zeichnung wiedergegebene Axialgewinderollkopf 1 ist für seine Einspannung in einer Werkzeugmaschine mit einem Schaft 2 versehen, der einen Teller 5 trägt. Mit dem Teller 5 ist ein Gehäuse 3 durch Schrauben 6 verbunden.The axial thread rolling head 1 shown in the drawing is provided for its clamping in a machine tool with a shaft 2 which carries a plate 5. A housing 3 is connected to the plate 5 by screws 6.

In dem Gehäuse 3 sind drei Gewinderollen 32 drehbar ge­lagert. Dafür sind einstellbare Lagerbolzen 30 vorgese­hen, die jeweils von zwei axial im Abstand zueinander stehend angeordneten Nadellagern 44 und 46 verdrehbar um ihre Achse 41 gehalten sind.In the housing 3, three thread rolls 32 are rotatably mounted. For this purpose, adjustable bearing bolts 30 are provided, each of which is rotatably held about its axis 41 by two needle bearings 44 and 46 which are axially spaced from one another.

Auf ihrer Stirnseite tragen die einstellbaren Lagerbol­zen 30 jeweils einen Exzenterzapfen 31, auf dem eine Ge­winderolle 32 mit einem Drehlager 13 gelagert ist. Die Gewinderollen32 sind austauschbar. Für ihre Halterung sind Schrauben 33 vorgesehen, die sich durch einen Dek­kel 34 in eine Gewindebohrung eines Exzenterzapfens 31 erstrecken. Die Schrauben 33 sind zentrisch zum Exzen­terzapfen 31 angeordnet, so daß ihre Achse 42 und damit die Achse des Exzenterzapfens 31 geringfügig versetzt ist zu der Drehachse 41 eines Lagerbolzens 30. Durch ein Drehen der Lagerbolzen 30 kann deshalb der Achsabstand der Gewinderollen 32 zueinander verstellt werden.On their front side, the adjustable bearing bolts 30 each have an eccentric pin 31 on which a threaded roller 32 with a rotary bearing 13 is mounted. The thread rolls32 are interchangeable. Screws 33 are provided for their mounting, which extend through a cover 34 into a threaded bore of an eccentric pin 31. The screws 33 are arranged centrally to the eccentric pin 31, so that their axis 42 and thus the axis of the eccentric pin 31 is slightly offset from the axis of rotation 41 of a bearing pin 30. By rotating the bearing pin 30, the center distance of the threaded rollers 32 can therefore be adjusted.

Für eine gleichzeitige Verstellung aller Gewinderollen sind diese getriebeartig miteinander verbunden über Zahnräder 8, welche mit den Lagerzapfen 30 verbunden sind, sowie mit einem in der Mitte des Rollkopfes 1 stehendem Zahnrad 7, mit dem sie im Eingriff stehen.For a simultaneous adjustment of all thread rolls, they are connected to each other like a gear via Gears 8, which are connected to the journal 30, and with a gear 7 standing in the middle of the rolling head 1, with which they are in engagement.

Zur Sicherung und Abstützung der Gewinderollen 32 dient weiterhin ein tellerförmiger Bund 40 am rückwärtigen En­de eines Lagerbolzens 30, der sich auf dem Gehäuse 3 ab­stützt, sowie ein Axiallager 26 auf der rückwärtigen Seite der Gewinderollen 32.A plate-shaped collar 40 at the rear end of a bearing bolt 30, which is supported on the housing 3, and an axial bearing 26 on the rear side of the thread rollers 32 also serve to secure and support the thread rollers 32.

Beim Rollen eines Gewindes 63 auf einem Werkstück 60 wird das Werkstück 60 entweder dem Gewinderollkopf 1 axial zugestellt oder der Gewinderollkopf 1 wird dem Werkstück entsprechend dem Pfeil 51 axial zugeführt. Wird dabei entweder der Gewinderollkopf 1 oder das Werk­stück 60 in Drehung versetzt, so wird mit dem Gewinde 50 der einzelnen Gewinderollen 32 auf einem Gewindestut­zen 61 des Werkstückes ein Gewinde erzeugt, das bis na­hezu unmittelbar an den Grundkörper 62 in einer Länge von L₁ heranreicht, wobei lediglich ein sehr schmaler Restabstand L₂ gegenüber dem Grundkörper 62 verbleibt, so daß das Gewinde länger ist und dichter an den Grund­körper 62 heranreicht als bei einem bekannten Axialge­winderollkopf, bei dem die Gewinderollen 32 auch auf ih­rer dem Gehäuse 3 abgewandten Seite gelagert sind.When rolling a thread 63 on a workpiece 60, the workpiece 60 is either fed axially to the thread rolling head 1 or the thread rolling head 1 is fed axially to the workpiece according to the arrow 51. If either the thread rolling head 1 or the workpiece 60 is set in rotation, then a thread is produced with the thread 50 of the individual thread rollers 32 on a threaded connection 61 of the workpiece, which extends almost directly to the base body 62 in a length of L 1, whereby only a very narrow remaining distance L₂ remains relative to the base body 62, so that the thread is longer and closer to the base body 62 than in a known axial thread rolling head, in which the thread rollers 32 are also mounted on their side facing away from the housing 3.

Claims (4)

1. Axialgewinderollkopf mit im Abstand zueinander ver­stellbaren Gewinderollen, die drehbar jeweils auf einem von einem Lagerbolzen getragenen Exzenter gelagert sind, dadurch gekennzeichnet, daß ein Exzenter (31) als ein Endzapfen eines Lagerbolzen (30) ausgebildet ist und nur einseitig gelagert ist. 1. Axial thread rolling head with spaced-apart thread rolls, which are rotatably mounted on an eccentric carried by a bearing pin, characterized in that an eccentric (31) is designed as an end pin of a bearing pin (30) and is only supported on one side. 2. Axialgewinderollkopf nach Anspruch 1, dadurch gekenn­zeichnet, daß der Lagerbolzen (30) im Gehäuse (25) des Rollkopfes (1) durch zwei nebeneinanliegende Drehlager (40, 46) gehalten ist. 2. Axial thread rolling head according to claim 1, characterized in that the bearing pin (30) in the housing (25) of the rolling head (1) is held by two adjacent pivot bearings (40, 46). 3. Axialgewinderollkopf nach Anspruch 2, dadurch gekenn­zeichnet, daß die Drehlager (44, 46) axial im Abstand zueinander stehen. 3. Axial thread rolling head according to claim 2, characterized in that the rotary bearings (44, 46) are axially spaced from one another. 4. Axialgewinderollkopf nach Anspruch 2, dadurch gekenn­zeichnet, daß die Drehlager (44, 46) als Nadellager aus­gebildet sind. 4. Axial thread rolling head according to claim 2, characterized in that the rotary bearings (44, 46) are designed as needle bearings.
EP19900112909 1989-09-09 1990-07-06 Axial thread rolling head Withdrawn EP0417416A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8910769U DE8910769U1 (en) 1989-09-09 1989-09-09
DE8910769U 1989-09-09

Publications (2)

Publication Number Publication Date
EP0417416A2 true EP0417416A2 (en) 1991-03-20
EP0417416A3 EP0417416A3 (en) 1991-04-03

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EP19900112909 Withdrawn EP0417416A3 (en) 1989-09-09 1990-07-06 Axial thread rolling head

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DE (1) DE8910769U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29606684U1 (en) * 1996-04-12 1996-07-11 Fette Wilhelm Gmbh Thread rolling head

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1065418A (en) * 1951-10-29 1954-05-25 Device for rolling screw threads on lathes in the metallurgical industry
DE1225136B (en) * 1963-02-25 1966-09-22 Sawod Freser Thread rolling head for rolling threads on thin-walled workpieces, especially on pipes
FR2281183A1 (en) * 1974-08-06 1976-03-05 Habegger Harold THREADING TOOL BY LAMINATION
FR2336198A1 (en) * 1975-12-23 1977-07-22 Habegger Harold LAMINATE THREADING APPARATUS
SU738734A1 (en) * 1978-06-19 1980-06-05 Предприятие П/Я Р-6753 Thread rolling head
FR2448949A1 (en) * 1979-02-16 1980-09-12 Hydexco Die for thread rolling - has heads mounted eccentrically on spindles to allow pivoting to release workpiece
SU940967A1 (en) * 1980-11-12 1982-07-07 Севастопольский Приборостроительный Институт Thread rolling on head
SU940968A1 (en) * 1980-11-14 1982-07-07 Севастопольский Приборостроительный Институт Apparatus for rolling thread on taps

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1065418A (en) * 1951-10-29 1954-05-25 Device for rolling screw threads on lathes in the metallurgical industry
DE1225136B (en) * 1963-02-25 1966-09-22 Sawod Freser Thread rolling head for rolling threads on thin-walled workpieces, especially on pipes
FR2281183A1 (en) * 1974-08-06 1976-03-05 Habegger Harold THREADING TOOL BY LAMINATION
FR2336198A1 (en) * 1975-12-23 1977-07-22 Habegger Harold LAMINATE THREADING APPARATUS
SU738734A1 (en) * 1978-06-19 1980-06-05 Предприятие П/Я Р-6753 Thread rolling head
FR2448949A1 (en) * 1979-02-16 1980-09-12 Hydexco Die for thread rolling - has heads mounted eccentrically on spindles to allow pivoting to release workpiece
SU940967A1 (en) * 1980-11-12 1982-07-07 Севастопольский Приборостроительный Институт Thread rolling on head
SU940968A1 (en) * 1980-11-14 1982-07-07 Севастопольский Приборостроительный Институт Apparatus for rolling thread on taps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29606684U1 (en) * 1996-04-12 1996-07-11 Fette Wilhelm Gmbh Thread rolling head
EP0800877A1 (en) * 1996-04-12 1997-10-15 Wilhelm Fette GmbH Thread rolling head
US5870918A (en) * 1996-04-12 1999-02-16 Schunk; Uwe Thread rolling head

Also Published As

Publication number Publication date
DE8910769U1 (en) 1989-11-02
EP0417416A3 (en) 1991-04-03

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