WO1996016274A1 - Selbstfurchende schraube - Google Patents
Selbstfurchende schraube Download PDFInfo
- Publication number
- WO1996016274A1 WO1996016274A1 PCT/EP1995/004527 EP9504527W WO9616274A1 WO 1996016274 A1 WO1996016274 A1 WO 1996016274A1 EP 9504527 W EP9504527 W EP 9504527W WO 9616274 A1 WO9616274 A1 WO 9616274A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- groove
- thread
- insert
- screw shaft
- 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.)
- Ceased
Links
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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0094—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw the screw being assembled or manufactured from several components, e.g. a tip out of a first material welded to shaft of a second material
-
- 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
-
- 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
Definitions
- the invention relates to a self-tapping screw with a screw-bearing screw shaft, which is provided on its screw-in side with a hardenable, multi-threaded thread part.
- Such a screw is known from DE-OS 43 10 938 (corresponding to US Pat. No. 5,205,466).
- This screw consists of a front steel rod which has been hardened by carburizing and a subsequent shaft made of austenitic, stainless steel. Both parts are butt welded together and have a continuous thread which has a high hardness in the area of the hardened steel rod for the self-grooving process and forms the threaded part.
- a problem with such a screw is the welding point at which the austenitic, stainless steel in the peripheral zone can be contaminated by carbon and also by nitrogen, as a result of which the corrosion resistance of the screw suffers. Apart from this, the welding of the two parts of the screw represents a considerable manufacturing effort which makes the screw more expensive.
- the invention has for its object to avoid the deterioration of the corrosion resistance of the screw and to design the screw so that it is easier and thus cheaper to manufacture.
- this is done in that the thread molding as flat, elongated insert is formed, which is inserted into an axial groove in the area of the screw-in side, extends into the area of the end face of the screw-in side and follows the thread formed in the screw shaft on its axial outer side in such a way that the thread of the screw shaft harmoniously merges into the thread profile along the insert.
- the insert is also particularly well suited to be anchored in the area of the screw-in side of the screw, namely in the axial groove, and on its axial outer side it corresponds to the thread formed in the screw shaft, so that it extends along the entire screw shaft results in a uniform, continuous thread which, in the area of its screw-in side, is able, due to the hard insert part, to groove the thread in question into the workpiece receiving the screw.
- the hard insert part easily clears or pushes the material of the receiving workpiece to the side due to the hardness of the insert part, without furthermore requiring a particular hardness of the material on the screw-in side surrounding the insert part.
- the screw shaft which may be made of austenitic, stainless steel
- the axial groove which can be axially cut or milled into the screw shaft without great manufacturing effort.
- the insert part for example produced by a punching process, is then inserted into this groove and can, for example, jam in the groove due to the width of the groove.
- the thread is then removed foamed, preferably in a known manner by rolling, the thread automatically extending over the insert part, so that there is a continuous, uniform thread over the length of the screw shank.
- the insert is then hardened, which is heated to the required temperature, for example by generating induction heat, whereupon the screw and its insert are quenched.
- the heating takes place practically only over the area of the screw-in side over which the insert extends, so that the subsequent area of the screw shaft cannot be affected by the heating.
- the insert is expediently designed such that it fills the groove up to its end facing away from the end face. In this case, especially in the process of rolling the thread, there is no zone of the groove in which it is not filled. An empty zone could be compressed during rolling.
- the groove is advantageously arranged centrally along one side of the screw shaft. With this arrangement, there is a favorable power transmission from the screw shaft to the insert.
- the insert in principle, it is possible to accommodate the insert in a single groove only on one side in the area of the screw-in side. However, it is also possible to have the groove on the end face merge into a slot which extends through it transversely, the insert part extending into the slot. In this design, the insert can be anchored in the screw shaft because of its extension, because it allows jamming on both sides of the screw shaft or this can be done centrally on the end face.
- the effect of the cutting or furrowing of a thread in a receiving workpiece, starting from the insert part, can be intensified by designing the groove in such a way that the groove running on one side of the screw shank via the slot into a second groove symmetrically opposite the former groove passes with axial extension and the insert extends over both grooves and the slot. Due to the extension of the insert part into the second groove, there is a corresponding thread-forming effect of the insert part on both sides of the screw shaft.
- the second groove it is not necessary for the second groove to have the same length as the first groove. If it is necessary to uniformly distribute the cutting forces emanating from the insert part on the circumference of the screw shank, the grooves are expediently designed such that the first and second grooves are of essentially the same length.
- the screw is expediently designed such that the insert part is shortened in the region of the end face relative to the groove and the protruding end of the screw shaft is compressed. Due to the shortening of the insert part, a free space remains in the area of the end face within the groove, which can be compressed here, so that the insert part cannot fall out of the groove.
- the shortening of the insert part is expediently designed such that it withdraws furthest in the middle at the end face, so that the free space remaining in the slit can be concentrated on the center and compressed here , which not only prevents the insert from falling out axially, but also prevents it from falling out sideways.
- FIGS. E and f the associated insert part in two views
- FIG. 2 g an enlarged view as a detail from FIG Screw-in side
- FIGS. 3a to d show a further variant with the first groove extending over the slot into a symmetrically opposite second groove in two views and the associated insert part in two views,
- FIG. 2 in four views with an insert part provided with an enlarged back according to the three views.
- Figure 1 a shows the blank for a self-tapping screw with the screw shaft 1, which has the screw head 2 with pressed washer 3 at its rear end.
- the axial groove 4 is milled into the screw shaft 1, which extends over the area designated as the screw-in side 5 and extends into the area of the end face 6 of the screw-in side 5.
- Figure 1 a shows the blank for the screw without insert.
- FIG. 1 b shows the same screw with the insert 7, which is inserted into the screw shaft 1 and into the groove 4 and forms the threaded molding (see FIGS. 1 e and f).
- the insert part 7 does not reach all the way to the end face 6.
- the free space 8 at its end facing the end face 6, which, as will be explained further below in connection with FIG. 2, for a special fastening of the insert part 7 can be used in the groove 4.
- FIG. 1 c shows the screw produced from the screw shaft 1 shown as a blank in FIGS. 1 a and b, with the thread 9 rolled onto the screw shaft 1.
- the screw shaft 1 according to FIG. 1 c is different from the representations in FIGS. 1 a and b Rotated 90 degrees so that the insert part 7 is visible with its axial outer side in FIG. 1c. From Figure 1 c it can be seen that the insert 7 at points 10, 11 and 12 completely follows the profile of the thread 9, that is to say it fits harmoniously into the thread 9. In the area of The screw side 5 of the part facing away from the screw head 2 is shown cut so that the insert 7 appears in section at this point.
- Figure 1 d shows a view of the blank according to Figure 1 with a view of the end face 6, so that in Figure 1 d the disc 3, the screw shaft 1 and the groove 4 are visible.
- the insert part 7 is shown in two views in FIGS. 1e and f.
- the insert 7 according to FIG. 1 e can be inserted directly into the groove 4 according to FIG. 1 a in this position.
- the insert 7 shows at its end facing the end face 6 an approximately circular arc-shaped rounding 13, which in the axial center of the insert 7 recedes as far as possible from the outer axial edges. In this way, the insert 7 can be fixed in the groove 4 in a manner which is explained in connection with FIG. 2.
- the screw according to FIGS. 2 a to d differs from the embodiment according to FIGS. 1 a to d in that, in addition to the groove 4, the screw shaft 1 has the slot 14 which extends through the end face 6, the groove 4 in the slot 14 passes. Because of this design, a flat insert part can be inserted into the groove 4 with the slot 14, as is shown as insert part 15 in FIGS. 2 e and f.
- the insert part 15 according to FIGS. 2 e and f has an angled portion 16 at its end facing the end face 6, so that the entire insert part 15 is L-shaped. This insert part 15 is shown inserted in the groove 4 and in slot 14 in FIG. 2 b, in accordance with the drawing according to FIG. 1 shown by the close hatching.
- FIG. 1 shown by the close hatching.
- FIG. 2 c shows the finished screw, the screw shaft 1 again being shown rotated by 90 degrees compared to the illustration in FIGS. 2 a and b, as in FIG. 1 c.
- the screw shown in FIG. 2 c corresponds completely to that according to FIG. 1 c.
- FIG. 2 d represents an axial view of the blank according to FIG. 2 a, the slot 14 penetrating the screw shaft 1 completely transversely in contrast to FIG. 1 d.
- FIG. 2 g shows an enlarged view of the lower part of the screw according to FIG. 2 c with the area of the end face 6.
- the material of the screw shaft 1 that has remained on both sides of the slot 14 is compressed inward, so that a constricted relative to the bend 16 Free space 18 results.
- the outward narrowing of the free space 18 ensures that the insert part 15 inserted into the groove 4 and the slot 14 cannot fall off the threaded shaft 1.
- the narrowing of the free space 18 can be brought about after inserting the insert part 15 by compressing the relevant end of the screw shaft 1.
- FIG. 3 a further variant of the screw is shown only as a blank with the threaded shaft 1, which here has, in addition to the first groove 4 and the shield 14, the further groove 19 that corresponds to the groove 4. faces metrically and extends exactly like the groove 4 axially along the screw shaft 1. Groove 4, slot 14 and groove 19 merge into one another, so that the flat insert part 20 can be inserted into these three recesses.
- the representation of the complete screw as in FIGS. 1 c and 2 c is dispensed with, since reference can be made in particular to FIG. 2 c in this regard.
- Figure 3 c and d show the insert 20 in two views.
- the insert part 20 extends over the area of an angle 16 into a further axially directed part 21 which fits into the groove 19.
- the bend 16 has a central recess 22 in the region of the end face 6, so that the insert part 20 can be fastened to the screw shaft 1 as in the exemplary embodiment according to FIG. 2 and shown in connection with FIG. 2 g.
- the material of the screw shaft 1 which laterally delimits the free space 23 according to FIG. 3b is compressed, as is shown in connection with FIG. 2g.
- FIGS. 4 a to c are a variant of the exemplary embodiment according to FIGS. 3 a and b, the screw according to FIGS. 4 a to c having two grooves 24 and 25 of equal length, which are connected to one another via the sheath 14.
- the insert 26 can be inserted into the grooves 24 and 25 and the socket 14, which projects with its two legs 27 and 28 into the two grooves 24 and 25.
- the insert part 26 has a rounding 29 in the area of the end face 6, so that due to this rounding there is an effect similar to that of the roof-shaped notch 17 according to FIG. 2e.
- FIGS. 4 a to c refer to the explanations for FIGS. 2 a to c.
- FIGS. 5 a to d show the screw shown as a blank in FIG. 5 b with a view of the end face 6.
- FIGS. 5 a to d it is merely a matter of receiving an insert part 30 with a different cross section.
- This is like the figures 5 e, f and g show in the usual three views, provided in the area of the threaded profile with a back 31 which is wider than its inner side.
- the cross section of the groove 32 is of course designed accordingly.
- the wider back 31 gives the thread profile present in its area a special resistance.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Forging (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP95940195A EP0745193A1 (de) | 1994-11-23 | 1995-11-17 | Selbstfurchende schraube |
| PL95315550A PL315550A1 (en) | 1994-11-23 | 1995-11-17 | Self-tapping screw |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4441716.0 | 1994-11-23 | ||
| DE19944441716 DE4441716A1 (de) | 1994-11-23 | 1994-11-23 | Selbstfurchende Schraube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996016274A1 true WO1996016274A1 (de) | 1996-05-30 |
Family
ID=6533967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1995/004527 Ceased WO1996016274A1 (de) | 1994-11-23 | 1995-11-17 | Selbstfurchende schraube |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0745193A1 (de) |
| CZ (1) | CZ210596A3 (de) |
| DE (1) | DE4441716A1 (de) |
| PL (1) | PL315550A1 (de) |
| WO (1) | WO1996016274A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000029754A1 (de) * | 1998-11-13 | 2000-05-25 | TOGE-Dübel A. Gerhard KG | Korrosionsfeste schraube mit schneideinsatz |
| CN109989978A (zh) * | 2018-01-02 | 2019-07-09 | 世铠精密股份有限公司 | 复合螺栓及其制造方法 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10147767B4 (de) | 2001-09-27 | 2005-09-15 | Sfs Intec Holding Ag | Selbstbohrende Schraube |
| DE10333412A1 (de) * | 2003-07-15 | 2005-02-03 | Adolf Würth GmbH & Co. KG | Schraube |
| ES2527288T3 (es) | 2009-11-18 | 2015-01-22 | Simpson Strong-Tie Company, Inc. | Sujetador con roscas endurecidas |
| CN104993378A (zh) * | 2015-05-22 | 2015-10-21 | 重庆从仁机电有限公司 | 火花塞帽自攻螺钉 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1916364A1 (de) * | 1969-03-29 | 1970-10-01 | Artur Fischer | Spreizkoerper zur Verankerung eines bolzenfoermigen Befestigungselementes in einer Wand od.dgl. |
| DE1925007A1 (de) * | 1969-03-29 | 1970-11-19 | Artur Fischer | Spreizkoerper zur Verankerung eines bolzenfoermigen Befestigungselementes in einer Wand od.dgl. |
| FR2378199A1 (fr) * | 1977-01-19 | 1978-08-18 | Sfs Stadler Ag | Vis percante |
| DE4310938A1 (de) * | 1992-07-15 | 1994-01-20 | Ker Yao Tin | Herstellung einer selbstschneidenden und gegebenenfalls selbstbohrenden Schraube mit austenitischem rostfreiem Stahl |
| DE4410027A1 (de) * | 1994-03-23 | 1995-09-28 | Ejot Verbindungstech Gmbh & Co | Bohrer, insbesondere Bohrschraube |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE167178C (de) * | ||||
| US3079968A (en) * | 1959-08-26 | 1963-03-05 | Nylok Corp | Self-locking self-tapping sheet metal screws |
| JPS5872711A (ja) * | 1981-10-27 | 1983-04-30 | 有限会社新城製作所 | オ−ステナイト系ステンレス鋼からなるドリルねじ |
-
1994
- 1994-11-23 DE DE19944441716 patent/DE4441716A1/de not_active Withdrawn
-
1995
- 1995-11-17 EP EP95940195A patent/EP0745193A1/de not_active Ceased
- 1995-11-17 CZ CZ962105A patent/CZ210596A3/cs unknown
- 1995-11-17 PL PL95315550A patent/PL315550A1/xx unknown
- 1995-11-17 WO PCT/EP1995/004527 patent/WO1996016274A1/de not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1916364A1 (de) * | 1969-03-29 | 1970-10-01 | Artur Fischer | Spreizkoerper zur Verankerung eines bolzenfoermigen Befestigungselementes in einer Wand od.dgl. |
| DE1925007A1 (de) * | 1969-03-29 | 1970-11-19 | Artur Fischer | Spreizkoerper zur Verankerung eines bolzenfoermigen Befestigungselementes in einer Wand od.dgl. |
| FR2378199A1 (fr) * | 1977-01-19 | 1978-08-18 | Sfs Stadler Ag | Vis percante |
| DE4310938A1 (de) * | 1992-07-15 | 1994-01-20 | Ker Yao Tin | Herstellung einer selbstschneidenden und gegebenenfalls selbstbohrenden Schraube mit austenitischem rostfreiem Stahl |
| DE4410027A1 (de) * | 1994-03-23 | 1995-09-28 | Ejot Verbindungstech Gmbh & Co | Bohrer, insbesondere Bohrschraube |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000029754A1 (de) * | 1998-11-13 | 2000-05-25 | TOGE-Dübel A. Gerhard KG | Korrosionsfeste schraube mit schneideinsatz |
| AU749035B2 (en) * | 1998-11-13 | 2002-06-20 | Toge-Dubel A. Gerhard Kg | Corrosion-resistant screw with a cutting insert |
| US6599072B1 (en) | 1998-11-13 | 2003-07-29 | TOGE-Dübel A. Gerhard KG | Corrosion resisting screw with cutting insert |
| CN109989978A (zh) * | 2018-01-02 | 2019-07-09 | 世铠精密股份有限公司 | 复合螺栓及其制造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ210596A3 (en) | 1997-03-12 |
| DE4441716A1 (de) | 1996-05-30 |
| PL315550A1 (en) | 1996-11-12 |
| EP0745193A1 (de) | 1996-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE10065398C2 (de) | Längenverstellbarer Platzhalter zum Einsetzen zwischen zwei Wirbelkörper | |
| DE19900791B4 (de) | Verbindungselement für zwei Maschinen- oder Bauteile insbesondere Paß-Dehnschraube, Paß-Gewindebolzen o. dgl. | |
| DE2217490C3 (de) | Halterung einer schwimmend gelagerten Mutter an einem Werkstück | |
| DE60008349T2 (de) | Lösbare schnellverschlussverbindung für eine teleskopische welle | |
| DE4207839A1 (de) | Nabenbefestigung | |
| DE1400883B1 (de) | Spanlos gewindeherstellende Schraube | |
| EP1509173A1 (de) | Wirbelkörperplatzhalter | |
| DE9490219U1 (de) | Gesperre-Kompressionsvorrichtung | |
| CH695478A5 (de) | Gewindebolzen, Pedrikelschraube und Pedrikelschraube mit Gewindebolzen | |
| EP1231390B1 (de) | Verbindungselement mit einer Schraube und einem daran unverlierbar angeordneten Stützelement | |
| DE3922957C1 (de) | ||
| DE2319547A1 (de) | Kugelschraubgetriebe | |
| EP0745193A1 (de) | Selbstfurchende schraube | |
| DE29805443U1 (de) | Orthopädisches Kompressionsschrauben-Baukastensystem | |
| WO2018113822A1 (de) | Kugelgewindetrieb und verfahren zur herstellung eines kugelgewindetriebs | |
| DE3444934C2 (de) | ||
| DE19529901A1 (de) | Knochenschraube | |
| DE102015117666B4 (de) | Endovaskuläre, medizinische Vorrichtung, Behandlungssystem mit einer solchen Vorrichtung und Herstellungsverfahren | |
| EP1039043B1 (de) | Sanitärarmatur mit einer Mutter zur Befestigung | |
| DE4313845C1 (de) | Sicherungsmutter | |
| DE102015122766A1 (de) | "Zahnscheibe mit mehrstegigen Haltezähnen" | |
| DE4316808C2 (de) | Spannstück für Rohrelemente | |
| WO2003004832A1 (de) | Befestigungsanordnung für einen schneidmeissel | |
| EP1498618A2 (de) | Schraube für harte Werkstoffe | |
| DE10020086B4 (de) | Blechmutter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN CZ HU JP KR PL US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
| WWE | Wipo information: entry into national phase |
Ref document number: PV1996-2105 Country of ref document: CZ |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 1995940195 Country of ref document: EP |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| WWP | Wipo information: published in national office |
Ref document number: 1995940195 Country of ref document: EP |
|
| WWP | Wipo information: published in national office |
Ref document number: PV1996-2105 Country of ref document: CZ |
|
| WWR | Wipo information: refused in national office |
Ref document number: PV1996-2105 Country of ref document: CZ |
|
| WWR | Wipo information: refused in national office |
Ref document number: 1995940195 Country of ref document: EP |
|
| WWW | Wipo information: withdrawn in national office |
Ref document number: 1995940195 Country of ref document: EP |