EP1291095B1 - Method of manufacturing an expanding sleeve - Google Patents
Method of manufacturing an expanding sleeve Download PDFInfo
- Publication number
- EP1291095B1 EP1291095B1 EP02405648A EP02405648A EP1291095B1 EP 1291095 B1 EP1291095 B1 EP 1291095B1 EP 02405648 A EP02405648 A EP 02405648A EP 02405648 A EP02405648 A EP 02405648A EP 1291095 B1 EP1291095 B1 EP 1291095B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- expansion
- expansion sleeve
- expanding sleeve
- bore
- longitudinal slots
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000004873 anchoring Methods 0.000 description 6
- 230000003313 weakening effect Effects 0.000 description 6
- 241000209094 Oryza Species 0.000 description 4
- 235000007164 Oryza sativa Nutrition 0.000 description 4
- 235000009566 rice Nutrition 0.000 description 4
- 238000003892 spreading Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- -1 Polypropylene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
- B21K21/04—Shaping thin-walled hollow articles, e.g. cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/56—Making machine elements screw-threaded elements
Definitions
- the invention relates to a method for producing a longitudinal slots, a bore and a cylindrical outer contour having, expansion sleeve.
- Expansion dowels with expansion sleeves of the above type are used in substrates such as concrete, Rock, masonry and the like anchored by the expansion sleeve by a spreader is radially expanded.
- This radial expansion is decisive for the achievable Anchoring values, as it creates a connection between the expansion sleeve and the substrate is, on the one hand frictionally and in some cases also positive Character can have.
- the proportion of frictionally engaged is particularly influenced Connection of the size of the available from the expansion sleeve Outer contour, d. H. a small available outer contour of the Expansion sleeve also results in lower anchoring values.
- a method for producing an expansion sleeve which radially is expandable.
- For the purpose of radial expansion of the expansion of the expansion sleeve is Provide longitudinal slots so that form lobes between the longitudinal slots.
- Radial The expansion sleeve is widened by an expansion body in the towards the front end tapered bore of the expansion sleeve is driven, so that the lobes radially to move outside. After radial expansion, d. H.
- the expansion plug when the expansion plug completely is set, can at the expansion sleeve via a load application means in the form of a thread, the is located at the end facing away from the expansion, a part, for example in shape a screw, a threaded rod or the like, are attached.
- a load application means in the form of a thread
- the longitudinal slots are generated and then to ensure a large for anchoring available outer contour by essentially radial Pressing together, the lobes of the expansion sleeve remaining between the longitudinal slots, the longitudinal slots largely closed.
- the present invention has for its object to provide a process for the preparation of specify an expansion sleeve, the economic production of too high anchoring values leading, expanding sleeves allows.
- the object is achieved in that the expansion sleeve initially with axial extending material weakenings is provided and by subsequent, essentially radial expansion, to form the longitudinal slots, is torn open in the area of material weaknesses.
- the material weakenings serving to form the longitudinal slots are torn open be formed, longitudinal slots with a negligible width and thus create a Outer contour with a maximum surface available for anchoring.
- the material weakenings are on the wall of the bore arranged the expansion sleeve and formed, for example, as a sharp, V-shaped grooves. Due to the simple manufacturing process, the process is extremely economical. Further revealed through the tearing process longitudinal slots, their corresponding, opposite each other Crack walls of the fractures are formed complementary.
- the tearing in the area of weakening of the material is preferably carried out by a heat treatment or suitable temperature to promote the tearing process.
- the choice of the heat treatment or temperature is advantageous adapted to the material of the expansion sleeve.
- thermoplastic materials for example Temperatures below the glass transition temperature advantageous, so the example the Polypropylene tearing temperatures of below -15 ° Celsisus chosen become.
- the expansion takes place by introducing a rice mandrel into the bore, wherein the outer diameter of the rice mandrel is greater than the inner diameter, at least in the material weakened area which is bore.
- the outer contour of the expansion sleeve is advantageously by applying a, on the External contour acting radially inward, force in a substantially cylindrical shape shaped after widening to obtain a maximum outer contour for anchoring and thus a to ensure optimal carrying behavior of the expansion sleeve in a borehole.
- the expansion sleeve is made of plastic in order to produce economically to ensure.
- the expansion sleeve is advantageously made of metal.
- Figs. 1 to 2 is a, generally designated 1, expansion sleeve with a radially expandable Spreading area 7 with four evenly distributed on the circumference arranged, gap-free formed longitudinal slots 5 shown.
- the spreading region 7 opposite end the expansion sleeve 1 has a load application means 4 in the form of an internal thread.
- the Longitudinal slots 5 are open towards the front end and extend at least partially along the expansion sleeve 1.
- the expansion sleeve 1 is penetrated by a central Bore 6.
- the outer contour 8 of the expansion sleeve 1 is substantially smooth and at the front End provided with a circumferentially formed bevel 2.
- the expansion sleeve 1 When manufacturing the expansion sleeve 1 is first made of plastic in an injection molding process created. Preferably, in this operation already, the substantially V-shaped and axially extending material weakenings 9 on the wall of the bore. 6 created. Subsequently, the expansion sleeve 1, by inserting a rice mandrel into the bore 6, wherein the outer diameter of the rice mandrel greater than the inner diameter the bore 6 is, essentially by radial expansion, to form the longitudinal slots 5, torn open in the area of material weakenings 9. In a subsequent production step the outer contour 8 of the expansion sleeve 1 by applying a, on the Outer contour 8 radially inwardly acting, force in a substantially cylindrical shape shaped.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Glass Compositions (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer Längsschlitze, eine Bohrung und eine zylinderförmige Aussenkontur aufweisenden, Spreizhülse.The invention relates to a method for producing a longitudinal slots, a bore and a cylindrical outer contour having, expansion sleeve.
Spreizdübel mit Spreizhülsen der oben genannten Art werden in Untergründen wie Beton, Gestein, Mauerwerk und dergleichen verankert, indem die Spreizhülse durch einen Spreizkörper radial aufgeweitet wird. Diese radiale Aufweitung ist massgebend für die erzielbaren Verankerungswerte, da dadurch zwischen Spreizhülse und Untergrund eine Verbindung geschaffen wird, die zum einen reibschlüssigen und in gewissen Fällen auch formschlüssigen Charakter haben kann. Beeinflusst wird beispielsweise insbesondere der Anteil an reibschlüssiger Verbindung von der Grösse der dafür von der Spreizhülse zur Verfügung stehenden Aussenkontur, d. h. eine geringe zur Verfügung stehende Aussenkontur der Spreizhülse hat auch geringere Verankerungswerte zur Folge.Expansion dowels with expansion sleeves of the above type are used in substrates such as concrete, Rock, masonry and the like anchored by the expansion sleeve by a spreader is radially expanded. This radial expansion is decisive for the achievable Anchoring values, as it creates a connection between the expansion sleeve and the substrate is, on the one hand frictionally and in some cases also positive Character can have. For example, the proportion of frictionally engaged is particularly influenced Connection of the size of the available from the expansion sleeve Outer contour, d. H. a small available outer contour of the Expansion sleeve also results in lower anchoring values.
Aus der DE4344382 ist ein Verfahren zur Herstellung einer Spreizhülse bekannt, die radial aufweitbar ist. Zum Zwecke der radialen Aufweitung ist der Spreizbereich der Spreizhülse mit Längsschlitzen versehen, so dass sich zwischen den Längsschlitzen Lappen bilden. Radial aufgeweitet wird die Spreizhülse, indem ein Spreizkörper in die sich zum vorderen Ende hin verjüngende Bohrung der Spreizhülse eingetrieben wird, so dass sich die Lappen radial nach aussen bewegen. Nach erfolgter radialer Aufweitung, d. h. wenn der Spreizdübel vollständig gesetzt ist, kann an der Spreizhülse über ein Lastangriffsmittel in Form eines Gewindes, das sich an dem dem Spreizbereich abgewandten Ende befindet, ein Teil, beispielsweise in Form einer Schraube, einer Gewindestange oder dergleichen, befestigt werden. Zur Herstellung der Spreizhülse werden die Längsschlitze erzeugt und dann zur Sicherstellung einer grossen für die Verankerung zur Verfügung stehenden Aussenkontur durch im wesentlichen radiales Zusammenpressen, der zwischen den Längsschlitzen verbliebenen Lappen der Spreizhülse, die Längsschlitze weitgehend geschlossen. From DE4344382 a method for producing an expansion sleeve is known which radially is expandable. For the purpose of radial expansion of the expansion of the expansion sleeve is Provide longitudinal slots so that form lobes between the longitudinal slots. Radial The expansion sleeve is widened by an expansion body in the towards the front end tapered bore of the expansion sleeve is driven, so that the lobes radially to move outside. After radial expansion, d. H. when the expansion plug completely is set, can at the expansion sleeve via a load application means in the form of a thread, the is located at the end facing away from the expansion, a part, for example in shape a screw, a threaded rod or the like, are attached. For the production the expansion sleeve, the longitudinal slots are generated and then to ensure a large for anchoring available outer contour by essentially radial Pressing together, the lobes of the expansion sleeve remaining between the longitudinal slots, the longitudinal slots largely closed.
Das bekannte Verfahren führt wohl zu einem anwendungstechnisch vorteilhaften Spreizdübel, hat aber den Nachteil, dass es aus der Sicht der Herstellung äusserst aufwändig ist und dadurch nicht wirtschaftlich.The known method probably leads to an advantageous application technology expansion dowel, But has the disadvantage that it is extremely expensive from the point of view of production and not economically.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung von einer Spreizhülse anzugeben, das die wirtschaftliche Herstellung von, zu hohen Verankerungswerten führenden, Spreizhülsen ermöglicht.The present invention has for its object to provide a process for the preparation of specify an expansion sleeve, the economic production of too high anchoring values leading, expanding sleeves allows.
Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass die Spreizhülse zunächst mit axial verlaufenden Materialschwächungen versehen wird und durch anschliessendes, im wesentlichen radiales Aufweiten, zur Bildung der Längsschlitze, im Bereich der Materialschwächungen aufgerissen wird.According to the invention the object is achieved in that the expansion sleeve initially with axial extending material weakenings is provided and by subsequent, essentially radial expansion, to form the longitudinal slots, is torn open in the area of material weaknesses.
Dadurch, dass die zur Bildung der Längsschlitze dienenden Materialschwächungen aufgerissen werden, entstehen Längsschlitze mit einer vernachlässigbaren Breite und damit eine Aussenkontur mit einer maximalen zur Verankerung zur Verfügung stehenden Oberfläche. In einer bevorzugten Ausführung sind die Materialschwächungen an der Wandung der Bohrung der Spreizhülse angeordnet und beispielweise als scharfe, V-förmige Nuten ausgebildet. Durch den einfachen Herstellvorgang ist das Verfahren äusserst wirtschaftlich. Ferner ergeben sich durch den Aufreissvorgang Längsschlitze, deren korrespondierende, einander gegenüberliegende Risswandungen der Bruchstellen komplementär ausgebildet sind.Because the material weakenings serving to form the longitudinal slots are torn open be formed, longitudinal slots with a negligible width and thus create a Outer contour with a maximum surface available for anchoring. In In a preferred embodiment, the material weakenings are on the wall of the bore arranged the expansion sleeve and formed, for example, as a sharp, V-shaped grooves. Due to the simple manufacturing process, the process is extremely economical. Further revealed through the tearing process longitudinal slots, their corresponding, opposite each other Crack walls of the fractures are formed complementary.
Das Aufreissen im Bereich der Materialschwächungen wird vorzugsweise durch eine Wärmebehandlung oder geeignete Temperatur unterstützt, um den Aufreissvorgang zu begünstigen. Die Wahl der Wärmebehandlung beziehungsweise Temperatur ist vorteilhafterweise an den Werkstoff der Spreizhülse angepasst. Bei Thermoplastwerkstoffen sind beispielsweise Temperaturen unterhalb der Glasübergangstemperatur vorteilhaft, so können die beispielsweise die Polypropylene Aufreiss-Temperaturen von unterhalb -15° Celsisus gewählt werden.The tearing in the area of weakening of the material is preferably carried out by a heat treatment or suitable temperature to promote the tearing process. The choice of the heat treatment or temperature is advantageous adapted to the material of the expansion sleeve. For thermoplastic materials, for example Temperatures below the glass transition temperature advantageous, so the example the Polypropylene tearing temperatures of below -15 ° Celsisus chosen become.
Vorzugsweise erfolgt das Aufweiten durch Einführen eines Reissdorns in die Bohrung, wobei der Aussendurchmesser des Reissdorns grösser als der Innendurchmesser, zumindest in dem mit der Materialschwächungen versehenen Bereich, der Bohrung ist.Preferably, the expansion takes place by introducing a rice mandrel into the bore, wherein the outer diameter of the rice mandrel is greater than the inner diameter, at least in the material weakened area which is bore.
Die Aussenkontur der Spreizhülse wird vorteilhafterweise durch Aufbringen einer, auf die Aussenkontur radial nach innen wirkenden, Kraft in eine im wesentlichen zylindrische Form nach dem Aufweiten geformt, um eine maximale Aussenkontur für die Verankerung zu erhalten und damit ein optimales Tragverhalten der Spreizhülse in einem Bohrloch sicherzustellen. The outer contour of the expansion sleeve is advantageously by applying a, on the External contour acting radially inward, force in a substantially cylindrical shape shaped after widening to obtain a maximum outer contour for anchoring and thus a to ensure optimal carrying behavior of the expansion sleeve in a borehole.
Vorzugsweise wird die Spreizhülse aus Kunststoff gefertigt, um eine wirtschaftliche Herstellung zu gewährleisten. Für den Einsatz unter speziellen Rahmenbedingungen, wie beispielsweise im Brandschutz, wird die Spreizhülse vorteilhafterweise aus Metall gefertigt.Preferably, the expansion sleeve is made of plastic in order to produce economically to ensure. For use under special conditions, such as in fire protection, the expansion sleeve is advantageously made of metal.
Die Erfindung wird nachstehend anhand eines Ausführungsbeispieles näher erläutert. Es
zeigen:
In den Fig. 1 bis 2 ist eine, insgesamt mit 1 bezeichnete, Spreizhülse mit einem radial aufweitbaren
Spreizbereich 7 mit vier gleichmäßig am Umfang verteilt angeordneten, spaltfrei
ausgebildeten Längsschlitzen 5 dargestellt. An dem, dem Spreizbereich 7 abgewandten Ende
besitzt die Spreizhülse 1 ein Lastangriffsmittel 4 in Form eines Innengewindes. Die
Längsschlitze 5 sind zum vorderen Ende hin offen ausgebildet und erstrecken sich wenigstens
teilweise entlang der Spreizhülse 1. Die Spreizhülse 1 ist durchsetzt von einer zentralen
Bohrung 6. Die Aussenkontur 8 der Spreizhülse 1 ist im wesentlichen glatt und am vorderen
Ende mit einer umlaufend ausgebildeten Fase 2 versehen.In Figs. 1 to 2 is a, generally designated 1, expansion sleeve with a radially expandable
Spreading area 7 with four evenly distributed on the circumference arranged, gap-free
formed
Beim Herstellen wird die Spreizhülse 1 zunächst aus Kunststoff in einem Spritzgussverfahren
erstellt. Vorzugsweise werden in diesem Arbeitsgang bereits die, im wesentlichen V-förmigen
und axial verlaufenden, Materialschwächungen 9 an der Wandung der Bohrung 6
erstellt. Anschliessend wird die Spreizhülse 1, durch Einführen eines Reissdorns in die Bohrung
6, wobei der Aussendurchmesser des Reissdorns grösser als der Innendurchmesser
der Bohrung 6 ist, im wesentlichen durch radiales Aufweiten, zur Bildung der Längsschlitze
5, im Bereich der Materialschwächungen 9 aufgerissen. In einem daran anschliessend Herstellungsschritt
wird die Aussenkontur 8 der Spreizhülse 1 durch Aufbringen einer, auf die
Aussenkontur 8 radial nach innen wirkenden, Kraft in eine im wesentlichen zylindrische Form
geformt.When manufacturing the expansion sleeve 1 is first made of plastic in an injection molding process
created. Preferably, in this operation already, the substantially V-shaped
and axially extending material weakenings 9 on the wall of the bore. 6
created. Subsequently, the expansion sleeve 1, by inserting a rice mandrel into the bore
6, wherein the outer diameter of the rice mandrel greater than the inner diameter
the bore 6 is, essentially by radial expansion, to form the
Claims (6)
- Method for manufacturing an expanding sleeve (1) having longitudinal slots (5), a bore (6) and a cylindrical external contour (8), characterised in that the expanding sleeve (1) is first provided with axially disposed weakened portions (9) of material and is then split open in the area of the weakened portions (9) by substantially radial expansion to form the longitudinal slots (5).
- Method according to claim 1, characterised in that the splitting open in the region of the weakened portions (9) of material is assisted by heat treatment.
- Method according to claim 1 or 2, characterised in that the expansion is effected by insertion of a splitting mandrel in the bore (6), the external diameter of the splitting mandrel being larger than the internal diameter of the bore (6) at least in the region provided with the weakened portions (9) of material.
- Method according to any one of claims 1 to 3, characterised in that the external contour (8) of the expanding sleeve (1) is formed to a substantially cylindrical shape after the expansion by the application of a force acting radially inwardly on the external contour (8).
- Method according to any one of claims 1 to 4, characterised in that the expanding sleeve (1) is made of plastics material.
- Method according to any one of claims 1 to 4, characterised in that the expanding sleeve (1) is made of metal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10138742 | 2001-08-07 | ||
| DE10138742A DE10138742A1 (en) | 2001-08-07 | 2001-08-07 | Method for producing an expandable sleeve, consists of providing it with axially oriented weakened sections, and subsequently converting the latter into axial slits by application of a radial expansion force |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1291095A2 EP1291095A2 (en) | 2003-03-12 |
| EP1291095A3 EP1291095A3 (en) | 2003-07-09 |
| EP1291095B1 true EP1291095B1 (en) | 2004-10-13 |
Family
ID=7694662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02405648A Expired - Lifetime EP1291095B1 (en) | 2001-08-07 | 2002-07-25 | Method of manufacturing an expanding sleeve |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6755747B2 (en) |
| EP (1) | EP1291095B1 (en) |
| AT (1) | ATE279279T1 (en) |
| DE (2) | DE10138742A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1662156A1 (en) * | 2004-11-30 | 2006-05-31 | HILTI Aktiengesellschaft | Anchor element |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3009177A (en) * | 1957-10-31 | 1961-11-21 | Olympic Screw & Rivet Corp | Method of forging blind rivet having a hollow shank with longitudinal lines of weakness |
| US3247698A (en) * | 1962-04-09 | 1966-04-26 | Mfg Process Lab Inc | Hub forming method and apparatus |
| DE2834241A1 (en) * | 1978-08-04 | 1980-02-28 | Volker Hainke | ANCHOR BOLTS |
| JPS59102039A (en) * | 1982-12-02 | 1984-06-12 | 三宅 晃 | Sleeve for anchor bolt |
| US4720224A (en) * | 1986-05-29 | 1988-01-19 | United Industries Corporation | Sleeve anchor |
| DE3833774C1 (en) * | 1988-10-05 | 1990-04-26 | Fischer-Werke Artur Fischer Gmbh & Co Kg, 7244 Waldachtal, De | |
| US5333980A (en) * | 1993-07-15 | 1994-08-02 | Textron, Inc. | Buckling semi-solid rivet |
| DE4344382A1 (en) * | 1993-12-24 | 1995-06-29 | Hilti Ag | Method for producing an expansion sleeve of an expansion anchor |
| DE19510306A1 (en) * | 1995-03-22 | 1996-09-26 | Hilti Ag | Expansion dowels |
| DE19815177A1 (en) * | 1998-04-04 | 1999-10-07 | Hilti Ag | Expansion dowels |
| GB2337951B (en) * | 1998-06-05 | 2002-03-13 | Avdel Textron Ltd | Method of forming a tubular member |
| AT407286B (en) * | 1999-01-05 | 2001-02-26 | Blum Gmbh Julius | FURNITURE FITTING |
| DE19961191A1 (en) * | 1999-12-18 | 2001-06-28 | Raymond A & Cie | Rivet comprises nail and locking section which fits through bore in materials to be joined, nail having shoulder sections which cooperate with U-shaped legs and deform them when nail is hammered in to lock rivet in place |
-
2001
- 2001-08-07 DE DE10138742A patent/DE10138742A1/en not_active Withdrawn
-
2002
- 2002-07-25 AT AT02405648T patent/ATE279279T1/en not_active IP Right Cessation
- 2002-07-25 DE DE2002501273 patent/DE50201273D1/en not_active Expired - Lifetime
- 2002-07-25 EP EP02405648A patent/EP1291095B1/en not_active Expired - Lifetime
- 2002-08-07 US US10/215,177 patent/US6755747B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE50201273D1 (en) | 2004-11-18 |
| DE10138742A1 (en) | 2003-02-20 |
| EP1291095A3 (en) | 2003-07-09 |
| ATE279279T1 (en) | 2004-10-15 |
| US6755747B2 (en) | 2004-06-29 |
| EP1291095A2 (en) | 2003-03-12 |
| US20030060296A1 (en) | 2003-03-27 |
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