EP1186360A2 - Verfahren und Vorrichtung zum Herstellen von Bolzenelementen - Google Patents
Verfahren und Vorrichtung zum Herstellen von Bolzenelementen Download PDFInfo
- Publication number
- EP1186360A2 EP1186360A2 EP01117159A EP01117159A EP1186360A2 EP 1186360 A2 EP1186360 A2 EP 1186360A2 EP 01117159 A EP01117159 A EP 01117159A EP 01117159 A EP01117159 A EP 01117159A EP 1186360 A2 EP1186360 A2 EP 1186360A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- jaws
- wire pin
- pair
- rolled
- 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
Links
- 238000000034 method Methods 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 92
- 230000004323 axial length Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000011161 development Methods 0.000 description 8
- 230000018109 developmental process Effects 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Images
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
- B21H3/027—Rolling of self-tapping screws
Definitions
- Bolt elements are known, for example screws, the two Have sections of different diameters. To this Sections are then rolled onto threads if necessary. For example, there are screws in one of the screw tips facing area a thread with a smaller Have outer diameter than in the rest of the Screw shank.
- these bolt elements have been manufactured in that first by extrusion a wire pin with two smooth cylindrical ones Areas.
- the piece of wire is placed in a die with a Step hole pressed in, so that the front area through Extrusion reduced to a smaller diameter.
- This ejector needle is exposed to high loads due to the previous pressing.
- the ejector needle must be thinner than in the case of pressed Blanks. Therefore, the needle breaks relatively often. If the length of the wire pin changes, the blanks are reduced a tool change necessary. In the case of smooth blanks, only that Stop length and thus the position adjusted. Beyond that the extrusion due to the high resistance only with relative Carry out at a slower speed.
- the invention is based on the object of a possibility create bolt elements of this type more cost-effective and with to manufacture less equipment.
- the invention proposes a method with the Features of claim 1 and a pair of dies with Features of claim 13. Developments of the invention are Subject of the dependent claims, the wording as well as the Full text of the summary by reference to the content of the Description is made.
- the bolt can be used manufacture less equipment and time.
- the material of the wire pin is displaced.
- the invention now proposes to carry out the reduction in such a way that the displacement of this material is gradually heading towards the free end of the bolt element takes place. A screw would the material is thus displaced towards the screw tip.
- the Wire pin is rolled with the help of two jaws, one of which at least one protruding from the rolling surface Has reduction area.
- This raised reduction surface serves to reduce the distance between the two jaws so that a section with a reduced diameter is rolled here.
- the Reduction area widened in rolling device This is intended to testify be that the width measured transversely to the rolling direction with progressing rolling direction becomes larger. This serves the area reduced diameter with progressive rolling axially extend.
- a further development of the invention can provide that the reduction area starts very narrow, so that at the beginning of the Rolling the reduced area does not jerky excessive forces occur.
- the free end of the wire pin associated edge of the reduction surface runs diagonally to the rolling direction. So that can be taken care of be that the displacement of the excess material only in one Direction is carried out, i.e. towards the free end of the wire pin.
- the height of the reduction surface can increase, for example be designed so that with increasing rolling not only the Diameter is gradually reduced, but also the axial length this area is enlarged. But it can also be provided be that the height of the reduction surface is constant.
- the method proposed by the invention can not only for Manufacture of smooth bolt elements to be used, but also to produce bolt elements with threads.
- the invention on the section with reduced Roll a thread diameter, especially a high helix thread. It can be provided here that the thread, in particular the Steep thread after finishing reducing the Roll diameter in one operation.
- the invention can be used in particular for the production of screws be used where the wire pin is rolled with a Head is provided. Such a head can also be used in others Bolt elements are attached.
- the invention also proposes a pair of rolling jaws with the features of claim 13. Contains at least one of the two jaws a reduction surface that is raised compared to the other rolling surface is formed so that here with a correctly arranged pair of rolling jaws the distance is reduced.
- the reduction surface has a smooth surface.
- the Reducing surface is designed such that its transverse to Rolling device measured width seen in rolling device increases, so the reduction surface widens in the rolling device.
- the Reduction area begins narrowly and then only in rolling device widened to their desired length.
- the reducing surface having part of the rolling jaw is designed to be removable Rolling jaws also reduced for bolt elements without a section Diameter usable. This is also the Possibility to set the reduction diameter.
- the reducing surface only over part of the extent of the rolling jaws in the rolling device extends.
- Ribs can then form on the reduction surface to form a Connect steep thread.
- FIG. 1 shows a roller jaw of a pair of roller jaws in perspective.
- the second roll jaw would look similar and would be above it Rolling jaw can be arranged.
- the rolling jaw contains a rolling surface 2, the working state of the pair of dies of the other die is facing. On this rolling surface 2 are oblique to the longitudinal direction extending sharp-edged ribs 3 are formed, with which a thread is rolled.
- the Longitudinal direction of the jaw 1 in Figure 1 from the left front to the right seen behind, represents the direction of movement of the rolling jaw 1
- Wire pin is placed on the rolling jaw at the front left and along the Rolled surface 2 rolled to the rear right. The rolling direction therefore runs from left front to right back and is indicated by arrow 4.
- the axial direction of the wire pin to be machined is perpendicular to this direction and parallel to the rolling surface 2, that is to say in the figure left to right.
- the wire pin is oriented so that its free end pointing to the right.
- the free end is the end of the Wire pin that faces away from the head, i.e. the one for a screw Screw tip.
- the area of reduced diameter is that Screw tip facing while the area of not reduced diameter facing the screw head.
- This reduction surface 6 is caused by an increase on the component 5 educated. It starts with a very narrow starting area 7, immediately after the start of the rolling jaw. Of this Starting area 7 from the reducing surface 6 widens, the Width means the extension transverse to the rolling device, i.e. transverse to the arrow 4. The widening is designed so that the free Edge 8 of the reducing surface 6 assigned to the end of the wire pin at an angle runs while the edge 9 of the reduction surface facing the head 6 runs in the rolling direction.
- the length of the reducing surface 6 in the rolling direction is about a third of the length of the rolling jaw 1.
- Die Reduction surface itself is flat and parallel to the rolling surface 2.
- FIG. 2 shows a schematic cross section by a pair of rolling jaws. It can be seen here that the one another facing surfaces of both rolling jaws each have a reducing surface 6 exhibit. The edges 8 associated with the free end of the wire pin both reducing surfaces 6 form an oblique shoulder.
- FIG 3 shows an example of a bolt element which with a Rolling jaw according to the invention by the method according to the invention can be manufactured.
- the bolt element in the example shown a screw, includes a first shaft portion 11 with a first Diameter to which a second shaft section 12 with a reduced diameter connects.
- the free end of the screw forms a screw tip 13 which is conical.
- On the A conventional screw thread is rolled onto shaft section 11, while a helical thread 14 is rolled in the screw section 12 is.
- the actual screw tip contains in the embodiment 3 also the steep thread 14, while in the similar Embodiment according to Figure 4 here a continuation of the usual Screw thread is present.
- the illustrated rolling jaw happens as follows.
- the one with a Headed cylindrical wire pin is inserted between the Rolling jaw pair inserted so that it at the front end in Figure 1 the rolling jaw 1 is arranged in its correct axial position.
- the two jaws are moved parallel to each other.
- the end face 7 of the component containing the reducing face 6 penetrates then into the material of the wire pin and reduce its thickness in this area.
- If the wire pin has the further rolling movement has reached the rear end of the reduction surface 6 is the area reduced diameter finished rolled. Then in this Area with the help of the ribbing 10 rolled up a steep thread.
- This roll machining can, if this is for special Applications are required, including an annular groove be rolled in.
- rolling and reduction are carried out simultaneously.
- the thread is rolled in the upper part and reduced in the lower part.
- a safe drive is the Screw possible and the angle of the reducible bar can be approx. 20 ° instead of 6 ° to 10 °, as is known in the prior art is.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Metal Rolling (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
Claims (19)
- Verfahren zum Herstellen eines zylindrischen Bolzenelements mit zwei Abschnitten unterschiedlichen Durchmessers, bei dem1.1 ein Drahtstift aus einem Draht abgelängt wird,1.2 der Drahtstift zwischen zwei Walzbacken (1) eingebracht wird und1.3 der Drahtstift in dem entsprechenden Abschnitt auf einen verringerten Durchmesser gewalzt wird.
- Verfahren nach Anspruch 1, bei dem das bei dem Reduzieren entstehende überschüssige Material des Drahtstifts in Richtung auf ein freies Ende des Drahtstifts verdrängt wird.
- Verfahren nach Anspruch 1 oder 2, bei dem mit zunehmendem Walzen die axiale Länge des in seinem Durchmesser reduzierten Abschnitts verlängert wird.
- Verfahren nach einem der vorhergehenden Ansprüche, bei dem der Drahtstift mit zwei Walzbacken (1) gewalzt wird, von denen mindestens einer eine gegenüber seiner Walzfläche (2) vorspringende Reduzierfläche (6) aufweist.
- Verfahren nach einem der vorhergehenden Ansprüche, bei dem die Reduzierfläche (6) sich in Walzvorrichtung (Pfeil 4) verbreitert.
- Verfahren nach Anspruch 4 oder 5, bei dem die Reduzierfläche (6) schmal beginnt.
- Verfahren nach einem der Ansprüche 4 bis 6, bei dem der dem freien Ende des Drahtstifts zugeordnete Rand (8) der Reduzierfläche (6) schräg gegenüber der Walzrichtung (Pfeil 4) verläuft.
- Verfahren nach einem der Ansprüche 4 bis 7, bei dem die Höhe der Reduzierfläche (6) gegenüber der Walzfläche (2) konstant ist.
- Verfahren nach einem der vorhergehenden Ansprüche, bei dem auf dem Abschnitt mit verringertem Durchmesser ein Gewinde aufgewalzt wird, insbesondere ein Steilgewinde.
- Verfahren nach Anspruch 9, bei dem das Gewinde nach dem Reduzieren des Durchmessers aufgewalzt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, bei dem auf den nicht reduzierten Teil des Bolzenelements ein Gewinde aufgewalzt wird, bereits während des Reduzierens des reduzierten Abschnitts.
- Verfahren nach einem der vorhergehenden Ansprüche, bei dem der Drahtstift vor dem Walzen mit einem Kopf versehen wird.
- Walzbackenpaar zur Herstellung eines Bolzenelements mit zwei Abschnitten unterschiedlichen Durchmessers, mit13.1 einer Walzfläche (2) an jedem Walzbacken (1), sowie mit13.2einer Reduzierfläche (6) an mindestens einem Walzbacken (1), die13.3 gegenüber der Walzfläche (2) des jeweiligen Walz backens (1) erhaben ausgebildet ist.
- Walzbackenpaar nach Anspruch 13, bei dem die Reduzierfläche (6) eine glatte Oberfläche aufweist.
- Walzbackenpaar nach Anspruch 13 oder 14, bei dem die Reduzierfläche (6) derart ausgebildet ist, dass sie sich in Walzrichtung (Pfeil 4) verbreitert.
- Walzbackenpaar nach einem der Ansprüche 13 bis 15, bei dem die Reduzierfläche (6) schmal beginnt.
- Walzbackenpaar nach einem der Ansprüche 13 bis 16, bei dem der die Reduzierfläche (6) aufweisende Teil (5) des Walzbackens (1) abnehmbar ausgebildet ist.
- Walzbackenpaar nach einem der Ansprüche 13 bis 17, bei dem sich die Reduzierfläche (6) nur über einen Teil der Erstreckung der Walzbacken (1) in Walzrichtung (Pfeil 4) erstreckt.
- Walzbackenpaar nach Anspruch 18, bei dem sich in Walzvorrichtung hinter der Reduzierfläche (6) eine Verrippung (10) zur Bildung eines Steilgewindes (14) anschließt.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK01117159T DK1186360T3 (da) | 2000-08-10 | 2001-07-14 | Fremgangsmåde og indretning til fremstilling af boltelementer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10039011 | 2000-08-10 | ||
DE10039011A DE10039011A1 (de) | 2000-08-10 | 2000-08-10 | Verfahren und Vorrichtung zum Herstellen von Bolzenelementen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1186360A2 true EP1186360A2 (de) | 2002-03-13 |
EP1186360A3 EP1186360A3 (de) | 2002-12-18 |
EP1186360B1 EP1186360B1 (de) | 2005-03-16 |
Family
ID=7651944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01117159A Expired - Lifetime EP1186360B1 (de) | 2000-08-10 | 2001-07-14 | Verfahren und Vorrichtung zum Herstellen von Bolzenelementen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1186360B1 (de) |
AT (1) | ATE290934T1 (de) |
DE (2) | DE10039011A1 (de) |
DK (1) | DK1186360T3 (de) |
ES (1) | ES2239639T3 (de) |
PT (1) | PT1186360E (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10254319B3 (de) * | 2002-11-21 | 2004-09-16 | Duve Kaltformtechnik Gmbh | Verfahren zum Herstellen einer Schraube mit einer Bohrspitze |
DE102011076180A1 (de) * | 2011-05-20 | 2012-11-22 | Hilti Aktiengesellschaft | Ankerbolzen und Herstellungsverfahren |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD33566A (de) * | ||||
US2314390A (en) * | 1939-08-17 | 1943-03-23 | New Process Screw Corp | Method and apparatus for rolling screws |
EP0351111A1 (de) * | 1988-07-11 | 1990-01-17 | Rover Group Limited | Verfahren zur Herstellung von Befestigungselementen mit Gewinde |
EP0428317A2 (de) * | 1989-11-14 | 1991-05-22 | Yugen Kaisha Shinjoseisakusho | Verfahren und Vorrichtung zur Herstellung eines Ankerbolzens |
US5242253A (en) * | 1992-10-08 | 1993-09-07 | Semblex Corporation | Thread-forming screw |
EP0682187A2 (de) * | 1994-04-13 | 1995-11-15 | RICHARD BERGNER GMBH & CO | Verfahren zur Herstellung einer Schraube und dafür bestimmter Schraubenrohling |
EP0824198A1 (de) * | 1996-08-15 | 1998-02-18 | Adolf Würth GmbH & Co. KG | Schraube mit einer selbstbohrenden Spitze |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE45391C (de) * | AMERICAN Screw Co. by Edwin G. Awgell President in New-York | Gewindewalzbacken | ||
SU1637923A1 (ru) * | 1988-12-05 | 1991-03-30 | Предприятие П/Я М-5514 | Инструмент дл одновременного накатывани резьбы и гладкой цилиндрической поверхности |
JPH08108239A (ja) * | 1994-10-05 | 1996-04-30 | Toyota Motor Corp | 転造ダイス |
-
2000
- 2000-08-10 DE DE10039011A patent/DE10039011A1/de not_active Withdrawn
-
2001
- 2001-07-14 EP EP01117159A patent/EP1186360B1/de not_active Expired - Lifetime
- 2001-07-14 DE DE50105600T patent/DE50105600D1/de not_active Expired - Lifetime
- 2001-07-14 DK DK01117159T patent/DK1186360T3/da active
- 2001-07-14 PT PT01117159T patent/PT1186360E/pt unknown
- 2001-07-14 AT AT01117159T patent/ATE290934T1/de active
- 2001-07-14 ES ES01117159T patent/ES2239639T3/es not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD33566A (de) * | ||||
US2314390A (en) * | 1939-08-17 | 1943-03-23 | New Process Screw Corp | Method and apparatus for rolling screws |
EP0351111A1 (de) * | 1988-07-11 | 1990-01-17 | Rover Group Limited | Verfahren zur Herstellung von Befestigungselementen mit Gewinde |
EP0428317A2 (de) * | 1989-11-14 | 1991-05-22 | Yugen Kaisha Shinjoseisakusho | Verfahren und Vorrichtung zur Herstellung eines Ankerbolzens |
US5242253A (en) * | 1992-10-08 | 1993-09-07 | Semblex Corporation | Thread-forming screw |
EP0682187A2 (de) * | 1994-04-13 | 1995-11-15 | RICHARD BERGNER GMBH & CO | Verfahren zur Herstellung einer Schraube und dafür bestimmter Schraubenrohling |
EP0824198A1 (de) * | 1996-08-15 | 1998-02-18 | Adolf Würth GmbH & Co. KG | Schraube mit einer selbstbohrenden Spitze |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Section PQ, Week 199209 Derwent Publications Ltd., London, GB; Class P52, AN 1992-070942 XP002218017 -& SU 1 637 923 A (TKACHIK N G), 30. März 1991 (1991-03-30) * |
DATABASE WPI Section PQ, Week 199627 Derwent Publications Ltd., London, GB; Class P52, AN 1996-263007 XP002218018 -& JP 08 108239 A (TOYOTA JIDOSHA KK), 30. April 1996 (1996-04-30) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10254319B3 (de) * | 2002-11-21 | 2004-09-16 | Duve Kaltformtechnik Gmbh | Verfahren zum Herstellen einer Schraube mit einer Bohrspitze |
DE102011076180A1 (de) * | 2011-05-20 | 2012-11-22 | Hilti Aktiengesellschaft | Ankerbolzen und Herstellungsverfahren |
Also Published As
Publication number | Publication date |
---|---|
DE10039011A1 (de) | 2002-02-21 |
PT1186360E (pt) | 2005-06-30 |
ES2239639T3 (es) | 2005-10-01 |
ATE290934T1 (de) | 2005-04-15 |
EP1186360B1 (de) | 2005-03-16 |
DE50105600D1 (de) | 2005-04-21 |
DK1186360T3 (da) | 2005-07-25 |
EP1186360A3 (de) | 2002-12-18 |
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