EP0800877A1 - Tête à rouler les filets - Google Patents

Tête à rouler les filets Download PDF

Info

Publication number
EP0800877A1
EP0800877A1 EP97105483A EP97105483A EP0800877A1 EP 0800877 A1 EP0800877 A1 EP 0800877A1 EP 97105483 A EP97105483 A EP 97105483A EP 97105483 A EP97105483 A EP 97105483A EP 0800877 A1 EP0800877 A1 EP 0800877A1
Authority
EP
European Patent Office
Prior art keywords
rolling head
thread rolling
bearing
bore
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.)
Granted
Application number
EP97105483A
Other languages
German (de)
English (en)
Other versions
EP0800877B1 (fr
Inventor
Uwe Schunk
Gerd Nowak
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 EP0800877A1 publication Critical patent/EP0800877A1/fr
Application granted granted Critical
Publication of EP0800877B1 publication Critical patent/EP0800877B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B21H3/046—Thread-rolling heads working radially

Definitions

  • the invention relates to a thread rolling head according to the preamble of claim 1.
  • thread rolling heads There are basically three types of thread rolling heads, namely axial rolling heads, radial rolling heads and tangential rolling heads.
  • the axial rolling head has profile rollers with pitch-free profile rings.
  • the profile rollers can be swiveled around a horizontal axis, so that the workpiece or the rolling head rotates around by one complete revolution Thread pitch moves axially. Threads of any length can be produced.
  • the profile rollers are rotatably mounted on bolts, which in turn are designed eccentrically.
  • a gearwheel sits on the bolt and interacts with a central gearwheel in order to adjust the distance between the profile rollers. In this way, the feed can be accomplished before the actual operation.
  • the distance between the profile rollers can be changed by the degree of adjustment or by the position of the bolt. Different thread diameters can be produced.
  • the profile rollers have a flattening which faces the feed axis of the workpiece in the starting position.
  • the profile rollers are rotated through a certain angle with the aid of a spring or the like until frictional engagement with the workpiece is established.
  • Continued rotation of the rolling head or the workpiece causes the profile rollers to continue rotating and thereby form the thread.
  • the thread is created within a single revolution of the roller.
  • the flattened sides of the profile rollers again point to the workpiece so that it can be removed.
  • the tangential thread rolling head has two thread rolls, which are moved laterally against the workpiece and form the thread during the advancing feed movement, mainly in the direction tangential to the workpiece.
  • the forming process is essentially complete when the axes of the workpiece and the roller are perpendicular to one another.
  • the same advantages apply to tangential rolling as to radial rolling, i.e. relatively short machining time and production of threads with a short thread runout.
  • threads can be made behind a belt.
  • the bearing bolts for the profile rollers are rotatably mounted in two spaced-apart bearing plates.
  • the front bearing plate or front plate is, however, a hindrance in several thread forming operations, since it limits the approach of the profile rollers to a collar or the like at least by the thickness of the front plate.
  • Another disadvantage is that due to the storage of the profile rollers, the working area, i.e. the range of thread diameters that can be produced using the rolling head is limited.
  • the invention has for its object to provide a thread rolling head in which the profile rollers have an extended working area and are nevertheless stably supported.
  • the rolling head according to the invention should be suitable for the production of short threads and profiles for screw fittings or similar workpieces in which unfavorable space conditions make rolling difficult.
  • the profile rollers are formed in one piece with a bearing pin, which in turn is rotatably mounted for one-sided mounting in a bore in the bearing unit.
  • the integral formation of the profile roller and bolt has several advantages as a result. On the one hand, it has a larger work area, for example between 12 and 40 mm outer diameter. Due to the favorable storage conditions between the bearing pin and the hole, a higher stability compared to known front plate-less profile rollers is achieved.
  • the bearing pin can be fixed axially by means of a screw fastening.
  • a quick change system is preferred, as has become known in many versions.
  • the profiled roller and the bearing pin have an axial bore in which a locking pin is arranged with a conical locking surface, which in turn acts on a locking element which sits radially displaceably in a radial bore of the bearing pin and the bearing bore has an annular groove in which rotates around the locking element when the profile roller rotates.
  • the locking bolt is preferably acted upon by a spring, as a result of which the conical locking surface constantly keeps the locking element in engagement with the groove. If the locking pin is adjusted axially, the locking element can move radially inwards, so that the locking between the bearing pin and the bore is released. As a result, the profile roller with the bearing pin can be removed from the bore and replaced by another.
  • the invention is particularly suitable for axial and radial thread rolling heads.
  • An adjustment of the profile rollers in the radial direction is provided in both.
  • the profile rollers are adjusted radially outwards when a workpiece is to be inserted between the rollers.
  • the profile rollers are moved to adjust the center distance.
  • this is done in that the bearing pin for the profile roller is designed eccentrically and is received in a bore. If the bearing pin is rotated, for example with the aid of a suitable gear, the profile roller is also adjusted radially.
  • the bearing pin is rotatably mounted in a bushing which is designed eccentrically. If the bush is rotated about its axis in a conventional manner, the axis of the bearing pin of the profile roller is shifted. While in the known axial thread rolling head the bearing pin carries a gear which can be set in rotation via a central gear, the bushing can be provided with a pin on which the gear is arranged according to one embodiment of the invention.
  • the actuation of an axial thread rolling head in the embodiment according to the invention does not otherwise differ from a known axial thread rolling head. The same applies to the radial thread rolling head, which is formed with the profile rollers according to the invention.
  • the single figure shows an axial thread rolling head according to the invention in section.
  • An annular plate 10 is clamped against an annular disk 14 by means of clamping bolts, one of which is shown at 12, while pressing against a flange 16.
  • the plate 10 has three axially parallel through-holes, one of which is shown at 18, seen in the circumferential direction.
  • the bores 18 receive a bushing 20 which is closed at one end and is rotatably supported by means of needle bearings 22.
  • the hole the socket is arranged eccentrically. It receives a bearing pin 24 which is formed in one piece with a profile roller 26.
  • the bearing pin is supported in the bore of the bushing 20 via needle bearings 28 and 30 at the front and rear ends.
  • An axial needle bearing 32 is arranged between the associated side of the roller 28 and the plate 10 or the bush 20.
  • Roller 26 and bearing pin 24 have an axial through bore 34, in which a locking pin 36 is slidably mounted with a double cone surface 38 in the area of a radial bore 40 in the bearing pin 24, in which a locking element 42 is seated, which is formed inside and outside spherical cap.
  • the outer end of the locking element 42 engages in a complementarily shaped annular groove 42a.
  • a plug 44 is screwed into the left end of the bore 34.
  • a spring 46 is arranged between the plug 44 and the associated end of the locking pin 36.
  • the locking element 42 is thereby pressed in constant engagement with the groove 42a, so that the profile roller 26 is axially secured. If the profile roller is to be removed, the pin 36 is pressed in the direction of arrow F, so that the locking element can be moved radially inwards and the bearing pin 24 is pulled out.
  • a bearing pin 48 is formed on which a gear 50 is arranged.
  • the gear wheel 50 meshes with a central wheel 52, which is seated on a stub shaft 54 of a coupling part 56, which cooperates with a coupling part 58.
  • the coupling parts 56, 58 form a dog clutch.
  • the coupling part 58 is connected to a shaft 60 with which the thread rolling head shown in the figure can be clamped in a machine tool.
  • a spiral spring 62 is arranged between the flange 16 and the stub shaft 54. If the coil spring is tensioned, it tries to turn the gear wheel 52, which also rotates the bushing 20 and thereby changes the distance between the profile rollers 26.
  • the trigger mechanism for the measure described is not shown. He is also known per se.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Vehicle Body Suspensions (AREA)
  • Heat Treatment Of Steel (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Pinball Game Machines (AREA)
EP97105483A 1996-04-12 1997-04-02 Tête à rouler les filets Expired - Lifetime EP0800877B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29606684U DE29606684U1 (de) 1996-04-12 1996-04-12 Gewinderollkopf
DE29606684U 1996-04-12

Publications (2)

Publication Number Publication Date
EP0800877A1 true EP0800877A1 (fr) 1997-10-15
EP0800877B1 EP0800877B1 (fr) 2000-08-02

Family

ID=8022497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105483A Expired - Lifetime EP0800877B1 (fr) 1996-04-12 1997-04-02 Tête à rouler les filets

Country Status (4)

Country Link
US (1) US5870918A (fr)
EP (1) EP0800877B1 (fr)
DE (2) DE29606684U1 (fr)
ES (1) ES2149525T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20102471U1 (de) * 2001-02-13 2001-04-26 Wilhelm Fette Gmbh, 21493 Schwarzenbek Gewinderollkopf
DE202004000424U1 (de) * 2004-01-14 2004-04-01 Fette Gmbh Axialgewinderollkopf
CN203621357U (zh) 2012-10-08 2014-06-04 上海泛华紧固系统有限公司 一种用于滚压管螺纹的滚压头、及其设备和应用该设备加工的管圆柱毛坯
CN103223453A (zh) 2013-03-31 2013-07-31 上海泛华紧固系统有限公司 钢管标准外径上直接滚压锥管外螺纹方法、装置及其产品
CN108907046B (zh) 2016-12-13 2021-01-29 上海泛华紧固系统有限公司 管螺纹加工方法、滚压头、设备、模块、生产线及其产品

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2150815A (en) * 1937-09-30 1939-03-14 Berger Kornel Screw-threaded stock and manufacture of same
FR1065418A (fr) * 1951-10-29 1954-05-25 Appareil pour rouler les pas de vis sur tours dans l'industrie métallurgique
CH394096A (de) * 1962-06-29 1965-06-30 Schaeublin Ernst Gewinderollwerkzeug
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
FR2448949A1 (fr) * 1979-02-16 1980-09-12 Hydexco Tete a rouler les filets
US4924687A (en) * 1989-10-16 1990-05-15 C. J. Winter Machine Works, Inc. Quick release thread roll support
EP0417416A2 (fr) * 1989-09-09 1991-03-20 Wilhelm Fette GmbH Tête axiale à rouler les filets

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US541551A (en) * 1895-06-25 Mechanism for rolling threads on bars or rods
CH595173A5 (fr) * 1975-12-23 1978-01-31 Harold Habegger
US5167136A (en) * 1991-08-09 1992-12-01 C. J. Winter Machine Works, Inc. Thread roll attachment
DE4236085C2 (de) * 1992-10-26 1995-04-06 Fette Wilhelm Gmbh Radialwalzkopf
DE9313282U1 (de) * 1993-09-03 1993-12-09 Wilhelm Fette Gmbh, 21493 Schwarzenbek Axialgewinderollkopf

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2150815A (en) * 1937-09-30 1939-03-14 Berger Kornel Screw-threaded stock and manufacture of same
FR1065418A (fr) * 1951-10-29 1954-05-25 Appareil pour rouler les pas de vis sur tours dans l'industrie métallurgique
CH394096A (de) * 1962-06-29 1965-06-30 Schaeublin Ernst Gewinderollwerkzeug
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
FR2448949A1 (fr) * 1979-02-16 1980-09-12 Hydexco Tete a rouler les filets
EP0417416A2 (fr) * 1989-09-09 1991-03-20 Wilhelm Fette GmbH Tête axiale à rouler les filets
US4924687A (en) * 1989-10-16 1990-05-15 C. J. Winter Machine Works, Inc. Quick release thread roll support

Also Published As

Publication number Publication date
US5870918A (en) 1999-02-16
EP0800877B1 (fr) 2000-08-02
DE29606684U1 (de) 1996-07-11
DE59702096D1 (de) 2000-09-07
ES2149525T3 (es) 2000-11-01

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