DE19525732A1 - Screw with head, threaded stem, and tip section - which contains milling ribs, forming milling edge protruding above tip surface - Google Patents
Screw with head, threaded stem, and tip section - which contains milling ribs, forming milling edge protruding above tip surfaceInfo
- Publication number
- DE19525732A1 DE19525732A1 DE1995125732 DE19525732A DE19525732A1 DE 19525732 A1 DE19525732 A1 DE 19525732A1 DE 1995125732 DE1995125732 DE 1995125732 DE 19525732 A DE19525732 A DE 19525732A DE 19525732 A1 DE19525732 A1 DE 19525732A1
- Authority
- DE
- Germany
- Prior art keywords
- screw
- milling
- tip
- rib
- tip section
- 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- Withdrawn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
- 238000003801 milling Methods 0.000 title claims abstract description 55
- 230000007704 transition Effects 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims 1
- 241001661918 Bartonia Species 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 5
- 239000011093 chipboard Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 239000002184 metal Substances 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
- 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
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0068—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw with multiple-threads, e.g. a double thread 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
-
- 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
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0073—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw characterised by its pitch, e.g. a varying pitch
-
- 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
- F16B25/0078—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw with a shaft of non-circular cross-section or other special geometric features of the shaft
-
- 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
- F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip
-
- 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
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
- F16B35/044—Specially-shaped ends
Abstract
Description
Die Erfindung geht aus von einer Schraube mit einem Schrau benkopf, einem ein Gewinde aufweisenden Schraubenschaft und einem eine Spitze bildenden vorderen Schraubenabschnitt.The invention is based on a screw with a screw head, a threaded shaft and a tip screw portion forming a tip.
Allgemein besteht beim Einschrauben von Schrauben das Pro blem, daß die Schraube sich zunächst ein Loch schaffen muß, bevor das Gewinde greift. Es sind bereits eine Vielzahl von Schrauben vorgeschlagen worden, die das Herstellen des ersten Loches ermöglichen.In general, there is a pro when screwing in screws problem that the screw must first create a hole, before the thread grips. There are already a lot of Screws have been proposed that manufacture the first Enable hole.
So sind beispielsweise Spannuten vorgeschlagen worden, d. h. Kerben in dem Spitzenabschnitt der Schraube, deren Kanten das Einschrauben erleichtern sollen.For example, flutes have been proposed; H. Notches in the tip portion of the screw, the edges of which Screw in should facilitate.
Ebenfalls bekannt sind angeschmiedete Bohrabschnitte, die aber für das Bohren eines Loches in Metall gedacht sind.Forged drill sections are also known but are intended for drilling a hole in metal.
Der Erfindung liegt die Aufgabe zugrunde, eine Schraube zu schaffen, die bei geringen Herstellungskosten das Einschrau ben der Schraube in den unterschiedlichsten Materialien erleichtert. The invention has for its object a screw create the screw-in at low manufacturing costs screw in a wide variety of materials facilitated.
Zur Lösung dieser Aufgabe schlägt die Erfindung eine Schraube mit den im Anspruch 1 aufgeführten Merkmalen vor. Weiterbil dungen der Erfindung sind Gegenstand von abhängigen Ansprü chen.To achieve this object, the invention proposes a screw with the features listed in claim 1. Continuing Applications of the invention are the subject of dependent claims chen.
Es hat sich herausgestellt, daß durch das Vorsehen mindestens einer vorstehenden Rippe fit einer Fräskante die Schraube sich leichter eindrehen läßt. Im Vergleich zu bekannten Span platten- oder Holzschrauben mit angekniffener Bohrspitze ist die Frässpitze einfacher zu produzieren.It has been found that by providing at least the screw on a protruding rib fits a milling edge is easier to screw in. Compared to known span plate or wood screws with pinched drill tip the milling tip easier to produce.
Zu Beginn des Einschraubvorganges wird durch die Frässpitze der Gewindekern der Schraube entlastet. Dadurch verringert sich das Einschraubmoment.At the beginning of the screwing in process is through the milling tip the thread core of the screw is relieved. This reduces the screwing torque.
Bei dünnen Leisten ist es möglich, ohne Vorbohren zu ver schrauben. Bei den herkömmlichen Schrauben bestand die Gefahr von Spaltrissen oder Aussplittern der Leiste.With thin strips it is possible to ver without pre-drilling screw. There was a danger with conventional screws cracking or splintering of the bar.
Auch bei der Verschraubung von hartbeschichteten Spanplatten wird durch die Frässpitze ein Spaltriß in der Beschichtung verhindert.Also when screwing hard-coated chipboard the cutting tip causes a crack in the coating prevented.
In Weiterbildung der Erfindung kann vorgesehen sein, daß die Längsrichtung der mindestens einen Fräsrippe in einer die Längsachse der Schraube enthaltenden Längsmittelebene liegt. Beim Einschrauben wird die Fräsrippe also praktisch quer zur Schraubrichtung bewegt.In a further development of the invention it can be provided that the Longitudinal direction of the at least one milling rib in one Longitudinal axis of the screw containing longitudinal median plane. When screwing in, the milling rib is practically transverse to Direction of screw movement.
In Weiterbildung der Erfindung kann vorgesehen sein, daß die Höhe der Fräsrippe von dem Wert Null stetig in Richtung auf den Schraubenkopf zunimmt.In a further development of the invention it can be provided that the Height of the milling rib steadily from zero to the screw head increases.
Besonders günstig ist es, wenn die Fräsrippe einen wenigstens angenäherten dreieckigen Querschnitt aufweist. Die Spitze des Dreiecks bildet dabei die Fräskante. It is particularly favorable if the milling rib at least has one has an approximate triangular cross section. The top of the The milling edge forms a triangle.
Da die Fräsrippe im wesentlichen nur den Einschraubvorgang zu Beginn des Einschraubens erleichtern soll, kann erfindungsge mäß vorgesehen sein, daß die Fräsrippe vor dem Übergang des Spitzenabschnittes in den Schaft endet.Since the milling rib essentially only the screwing process To facilitate the start of screwing in, can Invention according to be provided that the milling rib before the transition of the Tip section ends in the shaft.
Es kann ebenfalls vorgesehen sein, daß die Fräsrippe vor dem Beginn des Schraubengewindes endet.It can also be provided that the milling rib before The beginning of the screw thread ends.
Erfindungsgemäß kann vorgesehen sein, daß das Schraubenge winde bereits im Spitzenabschnitt der Schraube beginnt.According to the invention it can be provided that the screw tight wind begins in the tip section of the screw.
Für eine Schraube, die mit Holz oder Spanplatte verwendet werden soll, kann erfindungsgemäß vorgesehen sein, daß die Fräsrippe erst kurz hinter der Spitze der Schraube beginnt und sich dann bis kurz vor dem Übergang zu dem zylindrischen Schraubenschaft erstreckt.For a screw used with wood or chipboard should be provided according to the invention that the Milling rib only begins shortly behind the tip of the screw and then until just before the transition to the cylindrical Screw shaft extends.
Erfindungsgemäß können in Weiterbildung mehrere über den Um fang des Spitzenabschnittes verteilte Fräsrippen vorgesehen sein, beispielsweise vier oder sechs solcher Fräsrippen.According to the invention, several can be developed in a further development Distributed milling ribs provided at the beginning of the tip section be, for example four or six such milling ribs.
Die Schraube nach der Erfindung läßt sich sehr einfach her stellen. Es kann erfindungsgemäß in Weiterbildung vorgesehen sein, daß die Fräsrippen zusammen mit dem Gewinde gewalzt werden.The screw according to the invention can be very easily put. According to the invention, it can be provided in a further development be that the milling ribs rolled together with the thread will.
Weitere Merkmale, Einzelheiten und Vorzüge ergeben sich aus den Patentansprüchen, deren Wortlaut durch Bezugnahme zum Inhalt der Beschreibung gemacht wird, der folgenden Beschrei bung einer bevorzugten Ausführungsform der Erfindung sowie anhand der Zeichnung. Hierbei zeigen:Further characteristics, details and advantages result from the claims, the wording of which by reference to Content of the description is made of the following description exercise of a preferred embodiment of the invention as well based on the drawing. Here show:
Fig. 1 eine Seitenansicht des vorderen Bereiches einer Schraube nach der Erfindung; Figure 1 is a side view of the front portion of a screw according to the invention.
Fig. 2 eine der Fig. 1 entsprechende Darstellung bei einer zweiten Ausführungsform; FIG. 2 shows a representation corresponding to FIG. 1 in a second embodiment;
Fig. 3 in vergrößertem Maßstab perspektivisch die Ansicht des Spitzenabschnittes einer Schraube mit Fräsrippen nach der Erfindung, Fig. 3 in an enlarged scale perspective view of the tip portion of a screw with milling ribs according to the invention,
Fig. 4 eine weitere Ausführungsform mit einem sich bis in die Spitze fortsetzenden Schrauben gewinde. Fig. 4 shows a further embodiment with a screw extending into the tip.
Die in Fig. 1 nur in ihrem vorderen Bereich dargestellte Schraube enthält einen zylindrischen Schraubenschaft 1, an dessen einem, in Fig. 1 nicht dargestellten Ende ein Schrau benkopf angebracht ist. Der Schraubenkopf kann eine der übli chen Formen aufweisen, beispielsweise als Senkkopf ausgebil det sein. Er enthält in seinem äußeren Bereich eine Schrau benantriebsausbildung, beispielsweise einen Querschlitz oder eine Vertiefung in einer Sechseckform.The screw shown in Fig. 1 only in its front region contains a cylindrical screw shaft 1 , at one end, not shown in Fig. 1, a screw benkopf is attached. The screw head can have one of the usual forms, for example be designed as a countersunk head. In its outer area, it contains a screw drive arrangement, for example a transverse slot or a recess in a hexagon shape.
Auf dem Schraubenschaft 1 ist ein Gewinde 2 aufgewalzt. Es kann sich hierbei um ein eingängiges oder auch um zweigängi ges Gewinde handeln.A thread 2 is rolled on the screw shaft 1 . It can be a one-turn or two-turn thread.
Am vorderen Ende des Schraubenschaftes ist ein Schraubenspit zenabschnitt 3 gebildet, in dem sich der Durchmesser der Schraube etwa kegelförmig bis zu der eigentlichen Schrauben spitze 4 verringert. Das Gewinde 2 beginnt schon im Bereich des Spitzenabschnittes 3, kurz vor dem Übergang zwischen dem Spitzenabschnitt 3 und dem Gewindeschaft 1.At the front end of the screw shaft, a screw tip section 3 is formed, in which the diameter of the screw decreases approximately conically up to the actual screw tip 4 . The thread 2 begins in the area of the tip section 3 , shortly before the transition between the tip section 3 and the threaded shaft 1 .
In dem Spitzenabschnitt 3 der Schraube sind vier Fräsrippen 5 ausgebildet, die beim Walzen der Schraube zusammen mit dem Gewinde 2 hergestellt werden. Jede Längsrippe 5 enthält eine an ihrer Außenseite verlaufende Fräskante 6. Die Höhe der Fräsrippen 5, d. h. der Abstand der Fräskante 6 von der an sonst glatten Oberfläche 7 des Spitzenabschnittes 3 nimmt vom Beginn der Fräsrippe 5 in Richtung auf den oben in Fig. 1 zu denkenden Schraubenkopf ständig zu.In the tip section 3 of the screw, four milling ribs 5 are formed, which are produced together with the thread 2 when the screw is rolled. Each longitudinal rib 5 contains a milling edge 6 running on its outside. The height of the milling ribs 5 , ie the distance of the milling edge 6 from the otherwise smooth surface 7 of the tip section 3 increases continuously from the beginning of the milling rib 5 in the direction of the screw head to be thought of in FIG. 1.
Die Fräskante 6 verläuft geradlinig und liegt in einer Längs mittelebene der Schraube, die auch die Schraubenlängsachse selbst enthält.The milling edge 6 is straight and lies in a longitudinal median plane of the screw, which also contains the screw longitudinal axis itself.
Bei der in Fig. 1 dargestellten Schraube beginnen die Fräs rippen 5 an einer Stelle 8, die kurz hinter der tatsächlichen Schraubenspitze 4 liegt.In the screw shown in Fig. 1, the milling ribs 5 begin at a point 8 , which is just behind the actual screw tip 4 .
In diesem Bereich zwischen der Schraubenspitze 4 und dem Be ginn der Fräsrippen 5 weist der Spitzenabschnitt 3 einen Spitzenwinkel von beispielsweise etwa 45° auf, während er in dem Bereich, in dem die Fräsrippen 5 angeordnet sind, einen kleineren Spitzenwinkel von beispielsweise etwa 30° aufweist.In this area between the screw tip 4 and the beginning of the milling ribs 5 , the tip section 3 has a tip angle of, for example, approximately 45 °, while it has a smaller tip angle of, for example, approximately 30 ° in the area in which the milling ribs 5 are arranged .
Die Fräskanten 6 zweier gegenüberliegender Fräsrippen 5 schließen einen Winkel ein, der zwischen den beiden genannten Werten liegt, beispielsweise etwa 42°.The milling edges 6 of two opposing milling ribs 5 enclose an angle that lies between the two values mentioned, for example about 42 °.
Die in Fig. 1 dargestellte Schraube ist als Spanplatten schraube gedacht, sie dient also zum Einschrauben in Holz, beschichtetes Holz, Spanplatten oder dergleichen.The screw shown in Fig. 1 is intended as a chipboard screw, so it is used for screwing into wood, coated wood, chipboard or the like.
Die Anordnung und das Aussehen der Fräsrippen 5 geht aus Fig. 3 nochmals hervor, die eine perspektivische Darstellung nur des vorderen, die Schraubenspitze 4 aufweisenden Ab schnittes der Schraube darstellt. Aus der kegelförmigen Ober fläche 7 des Spitzenabschnittes 3 der Schraube treten kurz hinter der Spitze 4 an der bereits erwähnten Stelle 8 die Fräsrippen 5 aus der Oberfläche aus. Ihr Querschnitt, siehe das Ende 9 der Rippen 5, ist dreieckig. Die Spitze des Drei ecks bildet die Fräskante 6. Der Querschnitt und damit die Höhe der Fräsrippen 5 nimmt von ihrem Beginn, wo die Höhe den Wert Null aufweist, bis zu ihrem Ende 9 stetig zu.The arrangement and the appearance of the milling ribs 5 is shown in Fig. 3 again, which is a perspective view of only the front, the screw tip 4 from section of the screw. From the conical upper surface 7 of the tip section 3 of the screw, the milling ribs 5 emerge from the surface just behind the tip 4 at the point 8 already mentioned. Their cross-section, see the end 9 of the ribs 5 , is triangular. The cutting edge 6 forms the tip of the triangle. The cross section and thus the height of the milling ribs 5 increases steadily from their beginning, where the height is zero, to their end 9 .
Fig. 2 zeigt eine der Fig. 1 entsprechende Darstellung bei einer zweiten Ausführungsform, die insbesondere zur Verwen dung zum Einschrauben in härteres Material bestimmt ist. Der Spitzenabschnitt 3 weist gegenüber der Ausführungsform nach Fig. 1 eine leicht abweichende Form auf. Von der Spitze 4 ausgehend ist ein erster Bereich vorhanden, in dem die Fräs rippen 5 mit den Fräskanten 6 angeordnet sind. Die Fräsrippen 5 beginnen direkt an der Spitze 4 der Schraube. Die axiale Erstreckung des Bereiches mit den Fräsrippen 5 beträgt etwa ein Drittel des Spitzenabschnittes 3. An den mit den Fräsrip pen 5 versehenen Bereich schließt sich ein mittlerer Bereich an, wo das Gewinde 2 schon beginnt. Dieser Bereich weist einen Spitzenwinkel von etwa 29 bis 31° auf. In einem folgen den Bereich erfolgt der Übergang zu dem zylindrischen Schrau benschaft 1. Hier ist noch ein Spitzenwinkel von etwa 8 bis 10° vorhanden. Mit anderen Worten erfolgt der Übergang zwi schen der Schraubenspitze 4 und dem Schraubenschaft 1 stufen weise, so daß eine Art kontinuierlicher Krümmungsübergang gegeben ist. Fig. 2 shows a representation corresponding to FIG. 1 in a second embodiment, which is in particular intended for use for screwing into harder material. The tip section 3 has a slightly different shape compared to the embodiment according to FIG. 1. Starting from the tip 4 there is a first area in which the milling ribs 5 are arranged with the milling edges 6 . The milling ribs 5 start directly at the tip 4 of the screw. The axial extent of the area with the milling ribs 5 is approximately one third of the tip section 3 . At the area with the Mäsrip pen 5 adjoins a central area where the thread 2 already begins. This area has a tip angle of approximately 29 to 31 °. In a follow the area, the transition to the cylindrical screw shaft 1 takes place . Here there is still a tip angle of about 8 to 10 °. In other words, the transition between the screw tip 4 and the screw shaft 1 takes place gradually, so that a kind of continuous curvature transition is given.
Während bei der Ausführungsform nach Fig. 1 sich die Fräsrip pen 5 über fast die gesamte Länge des Spitzenabschnittes 3 erstrecken, nehmen sie bei der Ausführungsform nach Fig. 2 nur etwa das erste Drittel ein.While in the embodiment of FIG. 1, the pen Fräsrip 5 extend over almost the entire length of the tip section 3, they take in the embodiment of Fig. 2, only about a third of the first.
Bei der in Fig. 4 dargestellten Schraube erstrecken sich die Fräsrippen 5, von der Spitze 4 ausgehend, über den gesamten Spitzenbereich bis zu dessen Übergang in den zylindrischen Schaftbereich 1.In the screw shown in FIG. 4, the milling ribs 5 , starting from the tip 4 , extend over the entire tip area up to its transition into the cylindrical shaft area 1 .
Gleichzeitig ist das Gewinde 2 ebenfalls bis fast zur Spitze 4 ausgewalzt. Die Höhe der Fräsrippen, d. h. der Abstand der Fräskanten von der Oberfläche, aus der die Fräsrippen 5 her ausragen, ist wesentlich kleiner als die Spitzenhöhe des Ge windes 2, so daß das Gewinde 2 in dem vorderen Fräsbereich durch die Fräsrippen 5 in seiner Wirkung nicht beeinträchtigt wird. Dennoch tritt hier eine Fräswirkung auf, die das Ein schrauben der Schraube erleichtert.At the same time, the thread 2 is also rolled out almost to the tip 4 . The height of the cutting ribs, ie the distance of the cutting edges of the surface from which the cutting ribs protrude 5 ago, is substantially less than the peak height of the Ge windes 2, so that the thread 2 in the front milling through the milling ribs 5 in its action is not is affected. Nevertheless, there is a milling effect that makes it easier to screw in the screw.
Claims (11)
- 1.1 einem Schraubenkopf,
- 1.2 einem Schraubenschaft (1), der
- 1.2.1 ein Gewinde (2) aufweist, sowie mit
- 1.3 einem Schraubenspitzenabschnitt (3), der
- 1.3.1 mindestens eine Fräsrippe (5) aufweist,
- 1.3.2 die eine über die Oberfläche (7) des Schrauben spitzenabschnittes (3) vorspringende Fräskante (6) bildet.
- 1.1 a screw head,
- 1.2 a screw shaft ( 1 ) that
- 1.2.1 has a thread ( 2 ), and with
- 1.3 a screw tip section ( 3 ), the
- 1.3.1 has at least one milling rib ( 5 ),
- 1.3.2 which forms a milling edge ( 6 ) projecting over the surface ( 7 ) of the screw tip section ( 3 ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995125732 DE19525732A1 (en) | 1995-07-14 | 1995-07-14 | Screw with head, threaded stem, and tip section - which contains milling ribs, forming milling edge protruding above tip surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995125732 DE19525732A1 (en) | 1995-07-14 | 1995-07-14 | Screw with head, threaded stem, and tip section - which contains milling ribs, forming milling edge protruding above tip surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19525732A1 true DE19525732A1 (en) | 1997-01-16 |
Family
ID=7766853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1995125732 Withdrawn DE19525732A1 (en) | 1995-07-14 | 1995-07-14 | Screw with head, threaded stem, and tip section - which contains milling ribs, forming milling edge protruding above tip surface |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE19525732A1 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0939235A1 (en) * | 1998-02-25 | 1999-09-01 | Ludwig Hettich & Co. | Screw |
| EP1004781A1 (en) * | 1997-01-21 | 2000-05-31 | Cobra Fixations Cie. Ltd. | Combination between a wall anchor and a fixture |
| AT412665B (en) * | 2002-08-29 | 2005-05-25 | Schmid Schrauben Hainfeld Ges | SCREW FOR USE ON PARTS MANUFACTURED FROM WOOD |
| DE102006034584A1 (en) * | 2006-07-26 | 2008-01-31 | Ejot Gmbh & Co. Kg | Hole and thread forming screw |
| EP1925828A2 (en) | 2006-11-22 | 2008-05-28 | SWG Schraubenwerk Gaisbach GmbH | Screw |
| DE102007024240A1 (en) | 2007-05-18 | 2008-11-20 | Swg Schraubenwerk Gaisbach Gmbh | screw |
| WO2011111023A1 (en) * | 2010-03-11 | 2011-09-15 | Carlo Vittorio Sala | Thread-forming element, particularly for holes made in cold-deformable materials |
| DE102010013952A1 (en) * | 2010-03-30 | 2011-10-06 | Reisser Schraubentechnik Gmbh | chipboard screw |
| DE102011002962A1 (en) * | 2011-01-21 | 2012-07-26 | Swg Schraubenwerk Gaisbach Gmbh | chipboard screw |
| DE102014205464A1 (en) * | 2014-03-24 | 2015-09-24 | Schmid Schrauben Hainfeld Gmbh | screw |
| CN105889283A (en) * | 2016-03-10 | 2016-08-24 | 天津市福厚盈科技有限公司 | Manufacturing method for loosening-preventing screw |
| WO2016180661A1 (en) * | 2015-05-12 | 2016-11-17 | Adolf Würth Gmbh & Co.Kg | Screw comprising discontinuous scraping edges |
| WO2017080983A1 (en) * | 2015-11-12 | 2017-05-18 | Arnold Umformtechnik Gmbh & Co. Kg | Thread-forming screw |
| TWI640696B (en) * | 2017-06-08 | 2018-11-11 | 徐國泰 | Wood screw |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2645045B2 (en) * | 1975-11-04 | 1980-12-04 | Fumio Osaka Hirabayashi (Japan) | Sheet metal screw |
| DE3245700A1 (en) * | 1982-12-10 | 1984-06-14 | Richter-System GmbH & Co KG, 6103 Griesheim | SELF-TAPING QUICK-SCREW SCREW |
| DE3346704A1 (en) * | 1983-12-23 | 1985-07-04 | Richter-System GmbH & Co KG, 6103 Griesheim | SELF-TAPING QUICK-SCREW SCREW |
| DE4228727A1 (en) * | 1992-08-28 | 1994-03-03 | Wuerth Adolf Gmbh & Co Kg | Screw for use in hard wood without pre-drilling - has screw shaft with smooth section, threaded section and milling section to ensure screw head becomes countersunk during normal screw tightening |
-
1995
- 1995-07-14 DE DE1995125732 patent/DE19525732A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2645045B2 (en) * | 1975-11-04 | 1980-12-04 | Fumio Osaka Hirabayashi (Japan) | Sheet metal screw |
| DE3245700A1 (en) * | 1982-12-10 | 1984-06-14 | Richter-System GmbH & Co KG, 6103 Griesheim | SELF-TAPING QUICK-SCREW SCREW |
| DE3346704A1 (en) * | 1983-12-23 | 1985-07-04 | Richter-System GmbH & Co KG, 6103 Griesheim | SELF-TAPING QUICK-SCREW SCREW |
| DE4228727A1 (en) * | 1992-08-28 | 1994-03-03 | Wuerth Adolf Gmbh & Co Kg | Screw for use in hard wood without pre-drilling - has screw shaft with smooth section, threaded section and milling section to ensure screw head becomes countersunk during normal screw tightening |
Non-Patent Citations (1)
| Title |
|---|
| JP 5-196021 A.,In: Patents Abstracts of Japan, M-1513,Nov.24,1993,Vol.17,No.633 * |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1004781A1 (en) * | 1997-01-21 | 2000-05-31 | Cobra Fixations Cie. Ltd. | Combination between a wall anchor and a fixture |
| DE19807926A1 (en) * | 1998-02-25 | 1999-09-09 | Hettich Ludwig & Co | screw |
| EP0939235A1 (en) * | 1998-02-25 | 1999-09-01 | Ludwig Hettich & Co. | Screw |
| AT412665B (en) * | 2002-08-29 | 2005-05-25 | Schmid Schrauben Hainfeld Ges | SCREW FOR USE ON PARTS MANUFACTURED FROM WOOD |
| CN101501351B (en) * | 2006-07-26 | 2011-09-28 | Ejot合资有限公司 | Hole-forming and thread-forming screw |
| DE102006034584A1 (en) * | 2006-07-26 | 2008-01-31 | Ejot Gmbh & Co. Kg | Hole and thread forming screw |
| US8348572B2 (en) | 2006-07-26 | 2013-01-08 | Ejot Gmbh & Co. Kg | Hole-forming and thread-forming screw |
| EP1925828A2 (en) | 2006-11-22 | 2008-05-28 | SWG Schraubenwerk Gaisbach GmbH | Screw |
| US8408855B2 (en) | 2006-11-22 | 2013-04-02 | Swg Schraubenwerk Gaisbach Gmbh | Screw |
| DE102007024240A1 (en) | 2007-05-18 | 2008-11-20 | Swg Schraubenwerk Gaisbach Gmbh | screw |
| EP2012026A2 (en) | 2007-05-18 | 2009-01-07 | SWG Schraubenwerk Gaisbach GmbH | Screw |
| US8480342B2 (en) | 2007-05-18 | 2013-07-09 | Wuerth International AG part interest | Screw |
| WO2011111023A1 (en) * | 2010-03-11 | 2011-09-15 | Carlo Vittorio Sala | Thread-forming element, particularly for holes made in cold-deformable materials |
| RU2547917C2 (en) * | 2010-03-11 | 2015-04-10 | Карло Витторио САЛА | Thread cutting element, particularly, for bores made in cold-deformed materials |
| DE102010013952A1 (en) * | 2010-03-30 | 2011-10-06 | Reisser Schraubentechnik Gmbh | chipboard screw |
| DE102011002962A1 (en) * | 2011-01-21 | 2012-07-26 | Swg Schraubenwerk Gaisbach Gmbh | chipboard screw |
| DE102014205464A1 (en) * | 2014-03-24 | 2015-09-24 | Schmid Schrauben Hainfeld Gmbh | screw |
| DE102014205464B4 (en) | 2014-03-24 | 2020-07-16 | Schmid Schrauben Hainfeld Gmbh | screw |
| WO2016180661A1 (en) * | 2015-05-12 | 2016-11-17 | Adolf Würth Gmbh & Co.Kg | Screw comprising discontinuous scraping edges |
| DE102015107467A1 (en) | 2015-05-12 | 2016-11-17 | Adolf Würth GmbH & Co. KG | Screw with interrupted scraping edges |
| US10641310B2 (en) | 2015-05-12 | 2020-05-05 | Würth International Ag | Screw having discontinuous scraping edges |
| WO2017080983A1 (en) * | 2015-11-12 | 2017-05-18 | Arnold Umformtechnik Gmbh & Co. Kg | Thread-forming screw |
| US11156248B2 (en) | 2015-11-12 | 2021-10-26 | Arnold Umformtechnik Gmbh & Co. Kg | Thread-forming screw |
| CN105889283A (en) * | 2016-03-10 | 2016-08-24 | 天津市福厚盈科技有限公司 | Manufacturing method for loosening-preventing screw |
| TWI640696B (en) * | 2017-06-08 | 2018-11-11 | 徐國泰 | Wood screw |
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