EP3017914B1 - Procede de fabrication d'un outil de vissage pour boulons et/ou ecrous filetes - Google Patents

Procede de fabrication d'un outil de vissage pour boulons et/ou ecrous filetes Download PDF

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Publication number
EP3017914B1
EP3017914B1 EP15185993.1A EP15185993A EP3017914B1 EP 3017914 B1 EP3017914 B1 EP 3017914B1 EP 15185993 A EP15185993 A EP 15185993A EP 3017914 B1 EP3017914 B1 EP 3017914B1
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EP
European Patent Office
Prior art keywords
tips
recess
areas
inner opening
respect
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.)
Active
Application number
EP15185993.1A
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German (de)
English (en)
Other versions
EP3017914A1 (fr
Inventor
Dietmar Haubs
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.)
Gedore Holding GmbH
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Gedore Holding 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.)
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Publication date
Application filed by Gedore Holding GmbH filed Critical Gedore Holding GmbH
Publication of EP3017914A1 publication Critical patent/EP3017914A1/fr
Application granted granted Critical
Publication of EP3017914B1 publication Critical patent/EP3017914B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/06—Spanners; Wrenches with rigid jaws of socket type
    • B25B13/065—Spanners; Wrenches with rigid jaws of socket type characterised by the cross-section of the socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/04—Spanners; Wrenches with rigid jaws of ring jaw type

Definitions

  • the invention relates to a method for producing a screwing tool for threaded bolts and / or nuts with an inner opening which has a polygonal profile with twelve points.
  • the invention also relates to a screwing tool for threaded bolts and / or nuts with an inner opening which has a polygonal profile with twelve points, the opening being arranged in a block material.
  • a screwing tool for tightening a hexagonal fastening means such as in particular a screw nut or a bolt head is known.
  • the screwing tool is either designed in the "6-point” or the "12-point” form. In the latter form, the screwing tool provides a screw opening which has twelve pairs of angled flat surfaces which are connected to one another by means of curved engagement surfaces.
  • Another such tool is from the U.S. 3,125,910 known.
  • the object of the invention is to offer a method for the production of such screwing tools or a screwing tool which can be carried out or produced in a simple manner, the screwing tools produced being designed with a high degree of accuracy, so that with such a screwing tool for threaded bolts and / or Screwing work that is gentle on nuts is possible without excessively stressing threaded bolts and / or nuts in the area of the contact lines of two adjacent surfaces.
  • a screwing tool for threaded bolts and / or nuts which has an inner opening with a polygonal profile, is thus produced from a solid material.
  • a machining tool is used in such a way that a first recess with six points and a central focus is formed in the starting material.
  • This first recess essentially corresponds to the shape of the outer circumferential surface of a nut or a head of a threaded bolt.
  • the first recess thus has six surfaces that form a total of a hexagon, adjacent surfaces having common areas, which are referred to as peaks, these peaks being designed in the shape of a segment of a circular arc relative to the central focus of the first recess and extending overall convex.
  • the surfaces themselves are also designed in the shape of a segment of a circular arc and are slightly concave to the central focus aligned with the first recess.
  • the machining tool is set in such a way that this machining tool forms a second recess in the starting material, which second recess is formed with an identical shape and center of gravity to the first recess.
  • the processing tool is set rotated by 30 degrees relative to the first recess, so that six tips are also formed when the second recess is formed.
  • the inner opening is thus given a polygonal profile with twelve points, the two recesses being of identical design, so that the second recess also has convex and concave areas.
  • the sections running between the tips are rounded. This results in a uniform design in the inner region of the opening that is gentle on the material for the threaded bolts and nuts.
  • the first and the second recess are formed with a section S1 between oppositely arranged areas between two adjacent tips and a second distance S2 between oppositely arranged transition areas, the distance S1 as half the sum of a minimum and is designed according to a maximum width across flats according to ISO 691 tolerance class 1. This ensures that the finally produced opening with the polygonal profile lies between the minimum required and the maximum permitted width across flats.
  • the distance S2 is designed with the maximum width across flats according to ISO 691 tolerance class 1.
  • the areas between the six tips of the first recess and the six tips of the second recess are designed to be concave towards the inner opening. This ensures that the contact surfaces of the inner opening do not rest in the immediate vicinity of the edge areas of the threaded bolt or the nuts. A high load on these areas would lead to a rounding of the threaded bolt or the nut, which should be prevented with such tools, especially if such tools as Power screwdriver bits are used.
  • the rounding of the transition areas between each tip and the areas adjoining the tips concavely to the inner opening takes place with a radius which essentially coincides with the radius of the transition areas between the tips and the adjoining areas of each recess is formed. This results in a uniform wave profile in the entire inner surface area of the inner opening, so that pointed or sharp edges, which can lead to an increased pressure load on the nuts or screw bolts, are avoided.
  • the radius of the rounded areas is different, in particular smaller than the radius of the areas between two tips of the first and the second recess. Furthermore, it is finally provided that the inner opening is finally scaled to the required width across flats.
  • screwing tools can be produced which allow the tool surfaces to conform better to the outer surfaces of a nut or a bolt, since the minimum width across flats is taken into account for the design and formation of the tool surfaces.
  • the construction dimension that is to say accordingly the “nominal dimension” of an interior of the tool having the tool surfaces, is formed by the mean value of the minimum and maximum width across flats according to ISO 691. This results in a smaller angle of rotation of the tool relative to the bolt or the nut up to the point of contact between the tool surfaces and the outer surfaces of the nut or the bolt.
  • the better fit is also a result of the lower twist angle in Combination with a larger radius of the convex inner surface of the tool. This results in a lower load, in particular edge load on the tool and the nut or the screw head of a bolt.
  • Figure 1 shows a first recess 1, which is formed in a block material not shown in detail with six tips 2 and is part of a polygonal profile 3, as shown in FIG Figures 3 and 4 is shown.
  • the first recess has a central center of gravity 4 and, in addition to the tips 2, consists of areas 5, so that the first recess 1 forms a hexagon.
  • the tips 2 are convex relative to the center of gravity 4 and have a radius R1.
  • the areas 5 are concave to the center of gravity, the areas 5 having a radius R3.
  • the six tips 2 of the first recess 1 are arranged at regular intervals from one another.
  • a transition area 6 between the tips 2 and the areas 5 is also concave towards the center of gravity 4, each transition area 6 having a radius R2.
  • Figure 1 a length S1, which represents the distance between oppositely arranged areas 5 in the area of their mid-perpendicular. This length S1 corresponds to half the sum of the minimum width across flats to be finally set and the maximum width across flats according to ISO 691 tolerance class 1.
  • Another length S2 between opposite transition regions 6 is also in the Figure 1 shown. This length S2 corresponds to the maximum width across flats according to ISO 691 tolerance class 1.
  • FIG. 1 a length E, which extends between oppositely arranged tips 2 and corresponds to the product of the length S1 and 1.1577.
  • the radius R1 corresponds to the length S1 multiplied by 0.07
  • the radius R2 corresponds to the length S1 multiplied by 0.049, so that R3 results from S1, S2 and R1 before rounding with R2.
  • Figure 2 is the first recess 1 according to Figure 1 and superimposed with a second recess 7, in which the second recess 7 is arranged at 30 degrees to the first recess 1 and the second recess 7 exactly matches the shape of the first recess 1 and has the same center of gravity 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Forging (AREA)

Claims (10)

  1. Procédé de fabrication d'un outil de vissage pour des boulons et/ou des écrous filetés, lequel outil de vissage comprend une ouverture intérieure (8) ayant un profil polygonal (3) avec douze pointes (2), dans lequel
    - un premier évidement (1) est formé avec six pointes (2) et un point de gravité centrique (4) dans un matériau de bloc,
    - un deuxième évidement (7) est formé dans le matériau de bloc, lequel deuxième évidement (7) est formé avec une forme, qui est identique à celle du premier évidement (1) et avec un point de gravité (4) identique,
    - dans lequel le deuxième évidement (7) est formé dans le matériau de bloc de façon tournée de 30° par rapport au premier évidement (1), de sorte que douze pointes (2) sont formées dans l'ouverture intérieure (8), lesquelles pointes sont distribuées à intervalles réguliers l'une par rapport à l'autre sur la périphérie de l'ouverture intérieure (8),
    - dans lequel les pointes (2) sont formées de manière convexe par rapport à l'ouverture intérieure (8) et les zones entre des pointes (2) adjacentes sont formées de manière concave par rapport à l'ouverture intérieure (8), caractérisé en ce qu'
    - ensuite des zones de transition (6) entre chaque pointe (2) et les zones adjacentes aux pointes (2) et formées de manière concave par rapport à l'ouverture intérieure (8) sont arrondies.
  2. Procédé selon la revendication 1, caractérisé en ce que le premier (1) et le deuxième évidement (7) sont formés avec une première distance S1 entre des zones opposées (5) entre deux pointes adjacentes (2) et avec une deuxième distance S2 entre des zones de transition (6) opposées, dans lequel la distance S1 est formée de manière correspondante comme la moitié de la somme d'une ouverture de clé minimale et maximale selon ISO 691 classe de tolérance 1.
  3. Procédé selon la revendication 2, caractérisé en ce que la distance S2 est formée avec l'ouverture de clé maximale selon ISO 691 classe de tolérance 1.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que les zones (5) entre les six pointes du premier évidement (1) et les six pointes (2) du deuxième évidement (7) sont formées de manière concave par rapport à l'ouverture intérieure (8).
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que l'arrondissement des zones formées en tant que des zones de transition (6) entre chaque pointe (2) et les zones adjacentes aux pointes (2) et formées de manière concave par rapport à l'ouverture intérieure (8) est réalisé avec un rayon, qui est essentiellement concordant avec le rayon des zones de transition (6) entre les pointes et les zones adjacentes à celles-ci de chaque évidement (1, 7).
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le rayon des zones arrondies est formé de sorte qu'il est divergent du, notamment plus faible que le rayon des zones (5) entre deux pointes du premier respectivement du deuxième évidement (1, 7).
  7. Outil de vissage pour des boulons et/ou des écrous filetés, lequel outil de vissage comprend une ouverture intérieure (8) ayant un profil polygonal (3) avec douze pointes (2), dans lequel l'ouverture (8) est disposée dans un matériau de bloc et le profil polygonal (3) est formé d'un premier évidement (1) avec six pointes (2) et un point de gravité centrique (4) ainsi que d'un deuxième évidement (7), lequel deuxième évidement (7) comprend une forme, qui est identique à celle du premier évidement (1), et un point de gravité (4) identique, dans lequel le deuxième évidement (7) est disposé dans le matériau de bloc de façon tournée de 30° par rapport au premier évidement (1), de sorte que douze pointes (2) sont formées dans l'ouverture intérieure (8), lesquelles pointes sont distribuées à intervalles réguliers l'une par rapport à l'autre sur la périphérie de l'ouverture intérieure (8), dans lequel les pointes (2) sont formées de manière convexe par rapport à l'ouverture intérieure (8) et les zones entre des pointes adjacentes sont formées de manière concave par rapport à l'ouverture intérieure (8), caractérisé en ce que les zones de transition (6) entre chaque pointe (2) et les zones adjacentes aux pointes (2) et formées de manière concave par rapport à l'ouverture intérieure (8) sont arrondies et dans lequel le premier et le deuxième évidement sont formés avec une première distance S1 entre des zones opposées entre deux pointes adjacentes et avec une deuxième distance S2 entre des zones de transition opposées, dans lequel la distance S1 est formée de manière correspondante comme la moitié de la somme d'une ouverture de clé minimale et maximale selon ISO 691 classe de tolérance 1.
  8. Outil de vissage selon la revendication 7, caractérisé en ce que les zones (5) entre les six pointes (2) du premier évidement (1) et les six pointes (2) du deuxième évidement (7) sont formées de manière concave par rapport à l'ouverture intérieure (8).
  9. Outil de vissage selon l'une des revendications 7 à 8, caractérisé en ce que l'arrondissement des zones formées en tant que des zones de transition (6) entre chaque pointe (2) et les zones adjacentes aux pointes (2) et formées de manière concave par rapport à l'ouverture intérieure (8) est réalisé avec un rayon, qui est essentiellement concordant avec le rayon des zones de transition (6) entre les pointes et les zones adjacentes à celles-ci de chaque évidement (1, 7).
  10. Outil de vissage selon l'une des revendications 7 à 9, caractérisé en ce que le rayon des zones arrondies est formé de sorte qu'il est divergent du, notamment plus faible que le rayon des zones (5) entre deux pointes (2) du premier (1) respectivement du deuxième évidement (7).
EP15185993.1A 2014-10-31 2015-09-21 Procede de fabrication d'un outil de vissage pour boulons et/ou ecrous filetes Active EP3017914B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014115906.3A DE102014115906B3 (de) 2014-10-31 2014-10-31 Verfahren zur Herstellung eines Schraubwerkzeuges für Gewindebolzen und/oder Muttern

Publications (2)

Publication Number Publication Date
EP3017914A1 EP3017914A1 (fr) 2016-05-11
EP3017914B1 true EP3017914B1 (fr) 2020-11-25

Family

ID=54053873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15185993.1A Active EP3017914B1 (fr) 2014-10-31 2015-09-21 Procede de fabrication d'un outil de vissage pour boulons et/ou ecrous filetes

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EP (1) EP3017914B1 (fr)
DE (1) DE102014115906B3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125910A (en) * 1964-03-24 Kavalar
FR2560099B1 (fr) * 1984-02-24 1986-10-24 Facom Outil de serrage pour boulonnerie
US4930378A (en) * 1988-04-22 1990-06-05 David S. Colvin Wrench opening engagement surface configuration
TW201223709A (en) * 2010-12-10 2012-06-16 Honiton Ind Inc Sleeve structure of hand tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP3017914A1 (fr) 2016-05-11
DE102014115906B3 (de) 2015-09-24

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