DE3042773A1 - Screw driver for phillips screws - has cross profile made up from two angle sections with their apices chamfered and welded together - Google Patents

Screw driver for phillips screws - has cross profile made up from two angle sections with their apices chamfered and welded together

Info

Publication number
DE3042773A1
DE3042773A1 DE19803042773 DE3042773A DE3042773A1 DE 3042773 A1 DE3042773 A1 DE 3042773A1 DE 19803042773 DE19803042773 DE 19803042773 DE 3042773 A DE3042773 A DE 3042773A DE 3042773 A1 DE3042773 A1 DE 3042773A1
Authority
DE
Germany
Prior art keywords
cross
sections
section
apices
welded
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Withdrawn
Application number
DE19803042773
Other languages
German (de)
Inventor
Horst Dipl.-Ing. 3577 Neustadt Holland-Letz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felo Werkzeugfabrik Holland Letz GmbH
Original Assignee
Felo Werkzeugfabrik Holland Letz GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Felo Werkzeugfabrik Holland Letz GmbH filed Critical Felo Werkzeugfabrik Holland Letz GmbH
Priority to DE19803042773 priority Critical patent/DE3042773A1/en
Publication of DE3042773A1 publication Critical patent/DE3042773A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00Screwdrivers
    • B25B15/001Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/005Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The cross-head screw driver nib has a cross-shape cross-section which is made up from two angle sections (2 and 3). The apices of the two sections are machined-down to create flat surfaces, by which the two sections are put together and welded together by weld (4). Alternatively, the cross-shape cross section can be created by a flat steel section, on the flanks of which narrower flat steel sections are butt welded. The tip of the cross shape section is machined- or ground-down at angles corresp. with the slope of the cross slot on the screw head.

Description

Schraubendreher für Kreuzschlitzschrauben Screwdriver for cross-head screws

Die Erfindung betrifft Schraubendreher fUr Kreuzschlitzschrauben, insbesondere Schraubendreher mit parallelwandigen Kreuzstegen, wie sie für Pozidriv-Supadriv-Schrauben erforderlich sind, die neueste Form von Kreuzschrauben, entwickelt aus der Phil Ilips-l(reuzschraube Phillips-Kreuzschraube.The invention relates to screwdrivers for cross-head screws, especially screwdrivers with parallel-walled cross bars, such as those for Pozidriv-Supadriv screws are required, the latest form of Phillips screws, developed from the Phil Ilips-l (reuz screw Phillips cross-head screw.

Die Klingen von Schraubendrehern für diese Kreuzschrauben werden nach dem Stand der Technik in der Weise hergestellt, daß an Abschnitte von Rund- oder Profilstahl Kegelspitzen angedreht und die Kreuznuten ausgefräst werden. Oft müssen die Spitzen noch in einer Matrize nachkalibriert werden, um die erforderliche Maßhaltigkeit und Passung zu erzielen.The blades of screwdrivers for these Phillips screws are after the prior art manufactured in such a way that on sections of round or Profile steel cone tips are turned on and the grooves are milled out. Often have to the tips are recalibrated in a die to achieve the required dimensional accuracy and to achieve a fit.

Andrehen der Rohlinge, Einfräsen der Kreuznuten und Kalibrieren sind relativ teuere Arbeitsgänge. Besonders bei hochlegierten Stählen, wie sie fur Schraubendreher mit guter Haltbarkeit benötigt werden0 sinkt die Zerspanungsleistung stark, der Werkzeugverschleiß und die Materialkosten steigen.Turning the blanks, milling the cross grooves and calibrating are relatively expensive operations. Especially with high-alloy steels, such as those used for screwdrivers with good durability are required0 the machining performance drops sharply, the Tool wear and material costs increase.

Bei einem anderen bekannten Verfahren werden die Kreuznuten in den Rohling kalt oder warm eingehämmert. Die Spitzen der Rohlinge werden zuvor so vorgedreht, daß nach dem Einhämmern der Kreuznuten die gewünschte Kegel form an der Spitze möglichst erreicht wird. Wegen der komplizierten geometrischen Form und dem unterschiedlichen Fließverhalten des Stahles wird die angestrebte Kegelform jedoch nicht genau erreicht. Entweder muß deshalb die Kegelspitze spanend nachgearbeitet oder es müssen unvollkommene Eingriffsverhältnisse zwischen Kreuzspitze des Schraubendrehers und der Kreuzschraube hingenommen werden.In another known method, the cross grooves in the Blank hammered cold or warm. The tips of the blanks are turned beforehand so that that after hammering in the grooves the desired cone shape at the top as possible is achieved. Because of the complex geometric shape and the different The flow behavior of the steel, however, does not exactly achieve the desired cone shape. Either the tip of the cone must therefore be reworked by machining or it must be imperfect Engagement ratios between the cross-tip of the screwdriver and the cross-head screw be accepted.

Aufgabe der Erfindung ist es, ein Verfahren zur Herstellung der Kreuzspitze zu entwickeln, das folgende Forderungen erfüllt: 1. Kostengünstige Fertigung der Kreuzspitze mit hoher Genauigkeit 2. Verwendung möglichst hochlegierter Stähle für die Spitze des Schraubendrehers bei möglichst geringem Einsatzgewicht 3. Möglichkeit zum mehrmaligen Nachschleifen der abgenutzten Spitze.The object of the invention is to provide a method for producing the cross point to develop that meets the following requirements: 1. Inexpensive production of the Cross point with high accuracy 2. Use of high-alloy steels for the top of the Screwdriver with the lowest possible operating weight 3. Possibility to regrind the worn tip several times.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß bei einer Ausführungsform das Kreuzprofil aus zwei rechtwinklig gefalteten Bandstahlabschnitten gebildet wird, die an der Winkelbrust zusammengeschweißt sind.According to the invention, this object is achieved in that, in one embodiment the cross profile is formed from two sections of steel strip folded at right angles, which are welded together at the angled chest.

Die Bandstahlabschnitte sind dabei vor dem rechtwinkligen Falten an einem Ende in einer Winkel kontur so geschnitten, daß nach dem rechtwinkligen Falten der Bandstahlabschnitte die Winkelkontur die kegelig verlaufenden Außenkanten der Kreuzstege in der gewünschten Form bildet.The steel strip sections are in front of the right-angled folding one end at an angle contour cut so that after right-angled folding the steel strip sections the angular contour the tapered outer edges of the Forms cross webs in the desired shape.

Bei einer anderen Ausführungsform besteht die Kreuzspitze aus einem Bandstahlabschnitt, an dem ein Ende in der gewünschten Winkelkontur zugeschnitten ist und die beiden senkrecht dazu stehenden Kreuzstege durch zwei andere Bandstahlabschnitte gebildet werden, die mittig und senkrecht auf den ersten Abschnitt stumpf aufgeschweißt sind, Diese zwei aufgeschweißten Kreuzstege haben ebenfalls winklig zugeschnittene Spitzen, die jedoch nur die halbe Winkelkontur des ungeteilten Bandstahlabschnittes aufweisen.In another embodiment, the cross point consists of one Section of steel strip at which one end is cut to the desired angular contour is and the two perpendicular cross webs by two other steel strip sections are formed, which are butt welded centrally and perpendicular to the first section are, These two welded-on cross bars also have angled cut Tips, however, only half the angular contour of the undivided steel strip section exhibit.

In den beigefügten Zeichnungen ist der Erfindungsgegenstand beispielhaft dargestellt und erläutert. Es zeigen: Fig. 1 den flachliegenden Bandstahlabschnitt mit der winklig zugeschnittenen Spitze 1 Fig. 2 das zusammengeschweißte Kreuzprofil, bestehend aus den rechtwinklig gefalteten Bandstahlabschnitten 2 und 3 und der Schweißzone 4 Fig. 3 die Kreuzspitze in Seitenansicht Fig. 4 den flachliegenden Bandstahlabschnitt mit der winklig zugeschnittenen Spitze 5 Fig. 5 den zum Aufschweißen als Kreuzsteg vorgesehenen Bandstahlabschnitt mit winklig zugeschnittener Spitze 6 Fig. 6 das Kreuzprofil bestehend aus dem Bandstahlabschnitt entsprechend Fig. 4 und den zwei aufgeschweißten Bandstahlabschnitten entsprechend Fig. 5 In der Seitenansicht ergibt sich auch bei dieser Ausführungsform die gleiche Darstellung wie Fig. 3.The subject matter of the invention is shown by way of example in the accompanying drawings illustrated and explained. 1 shows the flat steel strip section with the angled tip 1 Fig. 2 the welded cross profile, consisting of the right-angled folded steel strip sections 2 and 3 and the welding zone 4 Fig. 3 the cross point in side view. Fig. 4 the flat steel strip section with the angled tip 5 Fig. 5 to be welded on as a cross web provided strip steel section with angled tip 6 Fig. 6 the Cross profile consisting of the steel strip section according to FIG. 4 and the two welded steel strip sections according to FIG. 5 In the The side view also results in the same representation in this embodiment like Fig. 3.

Die Länge der Bandstahlabschnitte zur Bildung des Kreuzprofils kann der Länge einer normalen Schraubendreherklinge entsprechen, aus kürzeren Bandstahlabschnitten gebildete kreuzfbrmige Spitzen können jedoch auch in einen Schaft eingesetzt werden, der aus einem billigeren Werkstoff besteht.The length of the steel strip sections to form the cross profile can the length of a normal screwdriver blade, made from shorter steel strips formed cross-shaped tips can, however, also be inserted into a shaft, which consists of a cheaper material.

Die Fertigung kann bei den beschriebenen AusfUhrungen automatisiert ablaufen. Die fertig verformten Kreuzspitzen,'insbesondere in der kürzeren Ausführungsform, können als Massenteile auch bei der erforderlichen thermischen Behandlung zur Gefügeoptimierung und zum Vergüten kostengünstig behandelt werden.The production can be automated in the embodiments described expire. The finished deformed cross tips, 'especially in the shorter embodiment, can also be used as mass parts with the necessary thermal treatment to optimize the structure and treated inexpensively for remuneration.

Die Bandstahlabschnitte werden aus kaltgewalztem Präzisionsbandstahl gefertigt, dessen Dicke der gewünschten Stegstärke der Kreuzspitze entspricht.The strip steel sections are made from cold-rolled precision strip steel manufactured, the thickness of which corresponds to the desired web thickness of the cross point.

Die Kreuzspitzen können mehrmals nachgeschliffen werden, da die Stege auf ganzer Länge paralldlwandig sind.The cross points can be reground several times as the webs are parallel-walled along their entire length.

LeerseiteBlank page

Claims (2)

Ansprüche: Kreuzschl 1 tzschraubendreher mit paralellwandigen Kreuzstegen dadurch gekennzeichnet, daß das Kreuzprofil aus zwei rechtwinklig gefalteten Bandstahlabschnitten (2) und (3) gebildet wird, die an der Winkel brust verschweißt sind oder, in einer anderen Ausführungsform, aus einem flachen Bandstahlabschnitt (4) und zwei darauf mittig sich gegenüberstehend senkrecht aufgeschweißten Bandstahlabschnitten (5). Requirements: Phillips screwdriver with parallel-walled cross bars characterized in that the cross profile consists of two steel strip sections folded at right angles (2) and (3) is formed, which are welded to the angle chest or, in one Another embodiment, from a flat strip steel section (4) and two on it centrally opposite each other vertically welded steel strip sections (5). 2. Kreuzschlitzschraubendreher nach Anspruch 1 dadurch gekennzeichnet, daß die Bandstahlabschnitte an einem Ende eine Winkel kontur aufweisen, die bei der verschweißten Kreuzspitze die kegelig verlaufenden Außenkanten der Kreuzstege bildet.2. Phillips screwdriver according to claim 1, characterized in that that the steel strip sections at one end have an angle contour that at the welded cross point the conical outer edges of the cross webs forms.
DE19803042773 1980-11-13 1980-11-13 Screw driver for phillips screws - has cross profile made up from two angle sections with their apices chamfered and welded together Withdrawn DE3042773A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803042773 DE3042773A1 (en) 1980-11-13 1980-11-13 Screw driver for phillips screws - has cross profile made up from two angle sections with their apices chamfered and welded together

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803042773 DE3042773A1 (en) 1980-11-13 1980-11-13 Screw driver for phillips screws - has cross profile made up from two angle sections with their apices chamfered and welded together

Publications (1)

Publication Number Publication Date
DE3042773A1 true DE3042773A1 (en) 1982-06-09

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DE19803042773 Withdrawn DE3042773A1 (en) 1980-11-13 1980-11-13 Screw driver for phillips screws - has cross profile made up from two angle sections with their apices chamfered and welded together

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DE (1) DE3042773A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937527A1 (en) * 1989-11-10 1991-05-16 Mikio Shigematsu Hexagonal hollow headed fastener key - has faceted and profiled sides to give greater surface contact with hollow head of screw
FR2895295A1 (en) * 2005-12-23 2007-06-29 Black & Decker Inc Cross threaded screwdriver bit for e.g. piercing reception hole, has coaxial piercing point situated inside tapered cover revolution surface forming angle with respect to axis of bit, where angle is greater than angle that forms end sides
CN102653086A (en) * 2012-05-24 2012-09-05 张家港优尼克五金工具有限公司 Screw driver
CN103128316A (en) * 2013-03-20 2013-06-05 沈阳飞机工业(集团)有限公司 Machining method of compound angles of cross cutter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937527A1 (en) * 1989-11-10 1991-05-16 Mikio Shigematsu Hexagonal hollow headed fastener key - has faceted and profiled sides to give greater surface contact with hollow head of screw
FR2895295A1 (en) * 2005-12-23 2007-06-29 Black & Decker Inc Cross threaded screwdriver bit for e.g. piercing reception hole, has coaxial piercing point situated inside tapered cover revolution surface forming angle with respect to axis of bit, where angle is greater than angle that forms end sides
CN102653086A (en) * 2012-05-24 2012-09-05 张家港优尼克五金工具有限公司 Screw driver
CN103128316A (en) * 2013-03-20 2013-06-05 沈阳飞机工业(集团)有限公司 Machining method of compound angles of cross cutter
CN103128316B (en) * 2013-03-20 2015-07-15 沈阳飞机工业(集团)有限公司 Machining method of compound angles of cross cutter

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