EP3475588A1 - Joining element - Google Patents
Joining elementInfo
- Publication number
- EP3475588A1 EP3475588A1 EP17740632.9A EP17740632A EP3475588A1 EP 3475588 A1 EP3475588 A1 EP 3475588A1 EP 17740632 A EP17740632 A EP 17740632A EP 3475588 A1 EP3475588 A1 EP 3475588A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reinforcing
- reinforcing element
- self
- tapping
- ceramic
- 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- Withdrawn
Links
- 238000005304 joining Methods 0.000 title claims abstract description 12
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 32
- 239000000919 ceramic Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims description 11
- 238000010079 rubber tapping Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000012783 reinforcing fiber Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims 2
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 239000002131 composite material Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241001269524 Dura Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/006—Non-metallic fasteners using screw-thread
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/008—Corrosion preventing means
Definitions
- the invention relates to a self-tapping joining element for joining components, in particular fiber-reinforced plastic components or hybrid materials.
- the US 2014/0271035 A1 discloses a high-strength composite screw, which consists of a
- Core element and a cladding element is formed.
- the screw has a head portion over which the screw is driven, and a
- the composite screw has at least in its retention area a composite shell, wherein the core may be formed of metal.
- the core may be formed of metal.
- composite materials which consist of both a bedding polymer matrix and the fibers stored therein or of differently composed materials, or
- Hybrid materials comprise at least one fiber-reinforced plastic layer and a metal layer, in particular a light metal layer.
- a self-tapping joining element comprising a self-tapping thread for connection to at least one component, comprises at least one reinforcing element and at least one thread-bearing enveloping element, wherein reinforcing element and enveloping element are formed from different materials.
- the self-tapping joining element is held in the connected state via the thread-carrying holding portion in the component.
- Joining element can be designed in the form of a screw or screw-like.
- the enveloping element comprises a holding section made of ceramic.
- the ceramic shell sufficient hardness for the process of threading is made available even in harder materials, without the risk of galvanic corrosion.
- the disadvantages of the lack of tensile strength due to the brittleness of the ceramic, are compensated by the reinforcing element used.
- the enveloping element and the reinforcing element can be connected by means of a positive engagement acting in the axial direction, the reinforcing element extending in the axial direction.
- a transfer of the resulting during the screwing forces on the enveloping element, in particular, if they are introduced directly onto the reinforcing element, can be ensured by acting in the direction of rotation form-fitting structures.
- the reinforcing element may be solid, as a hollow part, as a fiber mat, in the form of long fibers,
- Short fibers, multifilament fibers and / or so-called Wisker be formed.
- the reinforcing element may be formed as a mesh insert, which is designed in the form of a hollow cylinder.
- the reinforcing element may be formed of carbon fiber, glass fiber or other reinforcing fibers.
- the reinforcing element which forms a core surrounded by the enveloping element, has a radially considerably widened shoulder, which is enclosed by the ceramic in the axial direction.
- Form-fitting structures acting in the direction of rotation can be formed as toothing or peripheral profiling, or formed by a polygonal profile.
- the shoulder which is encompassed in the circumference at least partially by the ceramic enveloping element, be formed in the form of a polygonal profile. This has the advantage that a broad attack surface for the transmission of torque is available.
- the reinforcing element can be configured in such a way that it penetrates the enveloping element in the axial direction and fixes the enveloping element in a form-fitting manner between two axially spaced shoulders in the axial direction.
- the joining element may have a hole-forming tip.
- the hole-forming tip may preferably be formed of ceramic and may be designed for cutting or flow-hole-forming hole formation.
- the hole-forming tip may comprise an attachment tip, wherein the attachment tip may be formed by the reinforcement element.
- the invention relates to a method for producing an aforementioned self-lubricating pad.
- a preferably made of metal reinforcing element is embedded in a sintered ceramic.
- the reinforcing element may in a first embodiment with a green compact in one
- Forming process in particular injection molding process are surrounded. Subsequently, the joined element is subjected to a sintering process.
- Shell elements are then connected to the reinforcing element. This has the advantage that the reinforcing element by the sintering process, in which
- connection of the at least two Hülletti preferably takes place cohesively. This can be done by gluing or by soldering.
- FIG. 1 shows a basic design of a screw according to the invention
- FIG. 2 shows a further embodiment of a screw according to the invention
- FIG. 3 a shows a side view of a reinforcing element according to the invention
- FIG. 4a shows a first side view of a reinforcing element designed according to the invention
- FIG. 4b shows a second side view of a reinforcing element designed according to the invention
- FIG. 4a shows a first side view of a reinforcing element designed according to the invention
- FIG. 4b shows a second side view of a reinforcing element designed according to the invention
- FIG. 4b shows a second side view of a reinforcing element designed according to the invention
- FIG. 5 shows an illustration of a production step in a production method according to the invention
- FIG. 6 shows a screw according to the invention which has been produced by a method according to FIG. 5.
- Fig. 1 shows a basic representation of an element according to the invention, which is designed as a screw.
- the screw 10 is formed by a ceramic shell 12, in which a
- Reinforcement element is introduced in the form of a metal armature 14.
- the armature 14 extends in the axial direction in the interior of the screw 10 is substantially cylindrical and has a head 16, which is preferably not designed round and is embedded in the screw head 18.
- the screw 10 has a holding portion 20 with a thread.
- the ceramic shell 12 has a high hardness, whereby the self-tapping thread can be screwed into hard, in particular fiber-reinforced thermoplastic or thermosetting plastics, yet there is no tendency to corrosion.
- the metal anchor 14 provides a reinforcement of the brittle ceramic shell and allows a reliable screwing, as well as the absorption of high forces in the axial direction.
- Fig. 2 shows a further embodiment of a screw 30 according to the invention as well as in
- the screw 30 comprises a metal core 34 and a ceramic shell 32.
- the hole-forming tip 36 of the screw 30 is pierced by the metal core 34 and forms an attachment tip 38 at the front end of the tip
- these screws can be produced according to Fig. 1 or Fig. 2 with a method in which the metal core is overmolded in a ceramic green body, and the metal core and the ceramic shell are subjected to a common heat treatment. Under this
- FIG. 3a shows a variant of an armature 40 according to the invention in side view.
- the armature 14 comprises a head part 42 and a shank part 44.
- a peripheral profiling 46 is partially introduced, through which both an axial and circumferential force transmission area between the armature 40 and the surrounding sheath (not shown) is created.
- Fig. 3b shows a cross section of the head part 42, which is designed round.
- the head part 42 enclosed by the ceramic sheath is thus adapted to receive the torques introduced into the screw, and in particular to transmit them via the shank part 44 of the armature 40 on the threaded portion of the ceramic sheath.
- an enhancement of the brittle ceramic shell can be achieved in an effective manner.
- 4a shows a further embodiment of an armature 50 according to the invention.
- the armature 50 according to FIG. 4a does not comprise a head part, but is not round in its cross-section, wherein the shaft has widenings 52 which provide an axial reinforcement.
- 4b shows a further side view of a reinforcing element designed according to the invention. Due to the oval cross-sectional shape torques can be easily transferred between the shell and anchor 50.
- Fig. 5 shows a representation of a manufacturing step in an inventive
- a screw 60 according to the invention.
- the screw basically has a core 62 which is inserted between two sintered screw shell half shells 64a, 64b, whereupon the two screw shell half-shells 64a, 64b are glued or soldered together. In this way it is avoided that the core 62 is exposed to a heat input. This is particularly advantageous if the core is formed of a heat-sensitive material.
- Fig. 6 shows a sectional view of another embodiment of a screw 70 according to the invention. This is also produced according to a manufacturing method as described in Fig. 5 with two screw shell shells 74a, 74b are placed around a core 72, wherein a widened head 76 and has a common tip 78. Between the head 76 and the tip 78, the screw shells half shells 74a, 74b are fixed positively in the axial direction.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016111744.7A DE102016111744A1 (en) | 2016-06-27 | 2016-06-27 | joining element |
PCT/EP2017/065915 WO2018002090A1 (en) | 2016-06-27 | 2017-06-27 | Joining element |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3475588A1 true EP3475588A1 (en) | 2019-05-01 |
Family
ID=59366375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17740632.9A Withdrawn EP3475588A1 (en) | 2016-06-27 | 2017-06-27 | Joining element |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3475588A1 (en) |
DE (1) | DE102016111744A1 (en) |
WO (1) | WO2018002090A1 (en) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3085461A (en) * | 1960-08-01 | 1963-04-16 | Formar Ind Inc | Molded plastic fastener having a sheet metal core element |
US4975014A (en) * | 1989-09-01 | 1990-12-04 | The Boeing Company | High temperature low thermal expansion fastener |
US5090857A (en) * | 1991-01-31 | 1992-02-25 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Metallic threaded composite fastener |
DE19831338C2 (en) * | 1998-07-13 | 2003-06-18 | Sepitec Foundation Vaduz | bone screw |
US20050117992A1 (en) * | 2003-11-25 | 2005-06-02 | Tor Evenrud | Bolting device |
WO2009079443A1 (en) * | 2007-12-14 | 2009-06-25 | Perry Matthew L | Ceramic lag bolt and use thereof in high temperature insulation installation |
DE102009043809A1 (en) * | 2008-12-05 | 2010-11-25 | Climasol-Solaranlagen Gmbh | Fastening element and roof construction |
US20140271035A1 (en) | 2013-03-14 | 2014-09-18 | Ting-Jui Wang | Screw made of high-strength composite material and high-strength capped screw made of high-strength composite material |
DE102014204449A1 (en) * | 2014-03-11 | 2015-09-17 | Ejot Gmbh & Co. Kg | Method for joining components, one of which consists of a fiber-reinforced plastic |
-
2016
- 2016-06-27 DE DE102016111744.7A patent/DE102016111744A1/en not_active Withdrawn
-
2017
- 2017-06-27 WO PCT/EP2017/065915 patent/WO2018002090A1/en unknown
- 2017-06-27 EP EP17740632.9A patent/EP3475588A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE102016111744A1 (en) | 2017-12-28 |
WO2018002090A1 (en) | 2018-01-04 |
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Legal Events
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STAA | Information on the status of an ep patent application or granted ep patent |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20190124 |
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Extension state: BA ME |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
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Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20190817 |