DE4405759A1 - Screw fastener for enamelled part - Google Patents
Screw fastener for enamelled partInfo
- Publication number
- DE4405759A1 DE4405759A1 DE19944405759 DE4405759A DE4405759A1 DE 4405759 A1 DE4405759 A1 DE 4405759A1 DE 19944405759 DE19944405759 DE 19944405759 DE 4405759 A DE4405759 A DE 4405759A DE 4405759 A1 DE4405759 A1 DE 4405759A1
- Authority
- DE
- Germany
- Prior art keywords
- screw
- sheet metal
- enamelled
- core hole
- metal part
- 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- Withdrawn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
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 238000004049 embossing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 210000003298 dental enamel Anatomy 0.000 abstract description 3
- 239000002320 enamel (paints) Substances 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000004901 spalling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/24—Making other particular articles nuts or like thread-engaging members
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/02—Nuts or like thread-engaging members made of thin sheet 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
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
-
- 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
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
Abstract
Description
Die Erfindung betrifft eine Schraubbefestigungslochung nach dem Oberbegriff des Patentanspruchs 1 sowie ein Verfahren zu deren Herstellung.The invention relates to a screw fastening perforation the preamble of claim 1 and a method for their manufacture.
Schraublochungen in emaillierten Blechteilen zum Anschrauben von Bauteilen sind in der Regel als Gewindeprägung (Prestolgewinde) ausgebildet. Bei solchen Gewindeprägungen kann jedoch nicht die erforderliche Gewindesteigung für die zum Anschrauben vorgesehenen Blechschrauben erreicht werden. Die Festigkeit der Gewindeprägung ist außerdem ungenügend, so daß die Blechschrauben beim Einschrauben leicht überdreht werden können. Durch das harte Email werden außerdem beim Einschrauben die Gewinde der Blechschrauben beschädigt. Außerdem platzt das Email im Bereich der Gewindeeingänge ab, so daß dort im Laufe der Zeit Schäden durch Korrosion auftreten.Screw holes in enamelled sheet metal parts for Components are usually screwed on as Thread embossing (prestole thread) trained. In such However, embossed threads may not be the required Thread pitch for those to be screwed on Tapping screws can be reached. The strength of the Thread embossing is also insufficient, so that the Tighten the self-tapping screws slightly when screwing them in can. The hard email also means that Screw in the threads of the self-tapping screws damaged. In addition, the enamel bursts in the area of the thread inputs from there, so that damage caused by corrosion over time occur.
Der Erfindung liegt die Aufgabe zugrunde, bei emaillierten Blechteilen eine einwandfreie Verschraubung von Bauteilen zu ermöglichen und vor allem Emailabplatzungen im Bereich der Schraublochung zu verhindern. Die Gewindeprägung im emaillierten Blechteil soll dabei in einem Arbeitsgang herstellbar sein. The invention is based, with enamelled the task Sheet metal parts a perfect screwing of components to enable and especially email spalling in the area to prevent the screw holes. The thread embossing in Enamelled sheet metal part is said to be in one operation be producible.
Die Lösung dieser Aufgabe gemäß der Erfindung ist dem kennzeichnenden Teil des Patentanspruches 1 bzw. 2 zu entnehmen.This object is achieved according to the invention characterizing part of claim 1 or 2 to remove.
Die Gewindeprägung im emaillierten Blechteil zur Befestigung von Bauteilen gemäß der Erfindung läßt sich in einfachster Weise in einem Arbeitsgang herstellen und ermöglicht ein festes und sicheres Anschrauben bei gleichzeitiger Verhinderung von Emailabplatzungen im Bereich der Anschraubstelle (Lochung).The thread embossing in the enamelled sheet metal part Attachment of components according to the invention can be in easy to manufacture in one operation and enables a firm and secure screwing on at the same time preventing email spalling in the Area of the screwing point (perforation).
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird anhand dieser nachfolgend näher beschrieben.An embodiment of the invention is in the drawing is shown and will be described in more detail below described.
Es zeigenShow it
Fig. 1 ein emailliertes Blechteil mit einer Gewindeprägung in einer Draufsicht, Fig. 1 an enameled sheet metal part with a thread embossed in a plan view,
Fig. 2 in Schnittdarstellung eine Schraubbefestigungsanordnung eines Bauteiles an einem emaillierten Blechteil mit einer Gewindeprägung nach Fig. 1. Fig. 2 in a sectional view Schraubbefestigungsanordnung a component on an enamelled sheet metal part with a screwthread stamping of FIG. 1.
Das beidseitig emaillierte Blechteil 1 hat ein durch einen Schnittprägestempel hergestelltes Kernloch 2 von beispielsweise 2,8 mm, das mit Hilfe eines anschließenden Prägungsvorganges zu einem gewünschten Kernloch 2′ mit einem größeren Durchmesser von etwa 3,8 mm aufgeweitet und gleichzeitig so verformt wird, daß um das Kernloch 2′ herum eine halbkugelförmige Ausprägung 3 gebildet wird. Bei dem Prägevorgang bleibt die gewünschte Gewindesteigung des Schraubkernloches 2′ erhalten, während im äußeren Bereich des Schraubenkernloches 2′ die halbkugelförmige Ausprägung 3 zu einer Spirale 5 ausläuft, die der Gewindesteigung 4 der Blechschraube 6 entspricht. Durch die halbkugelförmige spiralartige Gewindeausprägung 3 wird eine optimale Steifigkeit gegen die Zugrichtung der zum Einsatz kommenden Blechschraube 6 beim Anschrauben eines Bauteiles 10 am emaillierten Blechteil 1 erreicht. Dadurch werden Emailschäden in diesem Anschraubbereich vermieden. Die Gewindegänge 7, 7′, 7′′ im Blechteil 1 liegen symmetrisch waagrecht zwischen den Gewindeflanken 8 der Blechschraube 6.The sheet metal part 1 enamelled on both sides has a core hole 2 made, for example, of 2.8 mm, which is widened by means of a subsequent stamping process to form a desired core hole 2 'with a larger diameter of approximately 3.8 mm and is simultaneously deformed in such a way that around the core hole 2 'around a hemispherical shape 3 is formed. In the embossing process, the desired thread pitch of the screw core hole 2 'is retained, while in the outer region of the screw core hole 2 ' the hemispherical shape 3 runs out to a spiral 5 which corresponds to the thread pitch 4 of the self-tapping screw 6 . Due to the hemispherical spiral thread 3 an optimal stiffness against the pulling direction of the self-tapping screw 6 is achieved when screwing a component 10 onto the enamelled sheet metal part 1 . This prevents damage to the enamel in this screwing area. The threads 7 , 7 ', 7 ''in the sheet metal part 1 are symmetrically horizontal between the thread flanks 8 of the self-tapping screw 6 .
Die vorgeschlagene Kernlochausbildung im emaillierten Blechteil 1 ermöglicht hohe Anzugselemente beim Verschrauben, ohne daß dabei eine Blechverformung auftritt. Das Eindrehmoment für Blechschrauben ist dabei nieder. Ein Überdrehen bzw. Durchdrehen der Blechschrauben tritt praktisch bei dieser Anordnung nicht auf.The proposed core hole formation in the enamelled sheet metal part 1 enables high tightening elements when screwing, without causing sheet metal deformation. The screwing torque for self-tapping screws is low. Overtightening or loosening the sheet metal screws practically does not occur with this arrangement.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19944405759 DE4405759A1 (en) | 1994-02-23 | 1994-02-23 | Screw fastener for enamelled part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19944405759 DE4405759A1 (en) | 1994-02-23 | 1994-02-23 | Screw fastener for enamelled part |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4405759A1 true DE4405759A1 (en) | 1995-08-24 |
Family
ID=6510953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19944405759 Withdrawn DE4405759A1 (en) | 1994-02-23 | 1994-02-23 | Screw fastener for enamelled part |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4405759A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE825922C (en) * | 1942-01-31 | 1951-12-27 | Prestole Corp | Fastening element for a screw and method for its manufacture |
US2831388A (en) * | 1953-11-23 | 1958-04-22 | Prestole Corp | Apertured screw receiving deformity in sheet metal |
-
1994
- 1994-02-23 DE DE19944405759 patent/DE4405759A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE825922C (en) * | 1942-01-31 | 1951-12-27 | Prestole Corp | Fastening element for a screw and method for its manufacture |
US2831388A (en) * | 1953-11-23 | 1958-04-22 | Prestole Corp | Apertured screw receiving deformity in sheet metal |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8127 | New person/name/address of the applicant |
Owner name: AEG HAUSGERAETE GMBH, 90429 NUERNBERG, DE |
|
8110 | Request for examination paragraph 44 | ||
8125 | Change of the main classification |
Ipc: F16B 37/02 |
|
8139 | Disposal/non-payment of the annual fee |