EP3212361A1 - Outil d'installation pour insert de filetage en fil métallique à tourillon de montage pouvant être recourbé et procédé d'installation - Google Patents

Outil d'installation pour insert de filetage en fil métallique à tourillon de montage pouvant être recourbé et procédé d'installation

Info

Publication number
EP3212361A1
EP3212361A1 EP15797064.1A EP15797064A EP3212361A1 EP 3212361 A1 EP3212361 A1 EP 3212361A1 EP 15797064 A EP15797064 A EP 15797064A EP 3212361 A1 EP3212361 A1 EP 3212361A1
Authority
EP
European Patent Office
Prior art keywords
wire
thread insert
wire thread
installation tool
installation
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.)
Granted
Application number
EP15797064.1A
Other languages
German (de)
English (en)
Other versions
EP3212361B1 (fr
Inventor
Dennis Henke
Andreas Marxkors
Holger Thommes
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.)
Boellhoff Verbindungstechnik GmbH
Original Assignee
Boellhoff Verbindungstechnik 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 Boellhoff Verbindungstechnik GmbH filed Critical Boellhoff Verbindungstechnik GmbH
Publication of EP3212361A1 publication Critical patent/EP3212361A1/fr
Application granted granted Critical
Publication of EP3212361B1 publication Critical patent/EP3212361B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/143—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same for installing wire thread inserts or tubular threaded inserts

Definitions

  • the present invention relates to an installation tool for a wire thread insert for installation in a receiving thread of a component and an installation method for this wire thread insert in the component with receiving thread.
  • EP-A-0 140 812 and EP-A-0 157 715 Regularly, the outer diameter of the cylindrical walls of the wire thread insert must be slightly larger than the outer diameter of the receiving thread of the component to be selected. Therefore, the installation of the wire thread insert must be made in the receiving thread of the component with a reduction in diameter of the wire thread insert. In this way it is ensured that a firm fit of the wire thread insert is achieved by the elastic re-deformation of the wire thread insert after installation in the receiving thread.
  • a wire thread insert consists of a cylindrical helix with a plurality of helically wound turns. A first turn of this cylindrical coil opens into a straight-action radially projecting into the cylindrical helix mounting pin. With the aid of a suitable installation tool, this installation plug is gripped and thus the wire thread insert screwed into the receiving thread of the component. After completion of the installation, the installation pin is removed by breaking it off with the aid of a predetermined breaking point in the first turn. In this way, creates a receiving thread with a consistently screwed wire thread insert.
  • DE 1 016 066 B discloses a locking screw to which a wire thread insert can be fastened.
  • the locking screw on a front side on a transverse slot in which a radially inwardly bent driving pin of the wire thread insert can be accommodated.
  • an internal channel is provided in the locking screw which ends at the transverse slot. Through this channel a pin can be plugged, with which the driving pin is pushed out of the transverse slot. The drive pin is neither excessively bent, broken off or permanently deformed. Subsequently, the locking screw can be removed from the wire thread insert.
  • the installation tools according to the invention are adapted to a wire thread insert having a cylindrical helix with a plurality of helically wound turns of a wire.
  • a first turn comprises a driving pin with a driving notch projecting over a bending region into an interior of the helix.
  • the driving pin protrudes radially inwardly with respect to the helix and encloses an angle ⁇ 90 ° with a extending in the direction of the Mil installingzapfens second turn of the helix.
  • the installation tool has the following features: a rotatable mounting spindle having a drive end for rotating the mounting spindle and a functional end for installing the wire threaded insert, wherein the functional end comprises at least one circumferentially length reduced thread engaging a cam edge at a first end In a Mitauerkerbe the wire thread insert and at a second end a Tarbieschulter for radially-outward bending of the entrainment pin of Drahtgewindeeinsalzes.
  • the installation tool has a known mounting spindle, on the functional end of the wire thread insert to be installed is rotatably fastened, so that it can be screwed by turning the mounting spindle in a threaded component hole.
  • the rotation of the Einbindspindcl via the drive end, which is moved manually or by means of a motor drive.
  • the wire thread insert can be fastened in a rotationally fixed manner in one direction of rotation of the mounting spindle.
  • the functional end has a suitable external thread, so that the wire thread insert can be screwed onto this external thread.
  • the functional end has an outer diameter which is smaller than the inner diameter of the wire thread insert.
  • the wire thread insert to the functional end of the installation tool.
  • a reduced in its circumferential length of thread is arranged. This means that at the end remote from the drive end function end of the mounting spindle seen in the longitudinal direction of the Einbauspindcl at least one last thread in its length is reduced such that this last thread does not extend over a rotational angle of 360 ° about the longitudinal axis of the mounting spindle. Rather, the length-reduced thread extends in the circumferential direction preferably over a length which is defined by a rotation angle of ⁇ 270 °, preferably ⁇ 180 °, about the longitudinal axis of the mounting spindle.
  • the two opposite ends of the reduced-length thread are formed as functional elements.
  • the driving edge which is formed by a radially inner and a radially outer leg.
  • the radially inner and the radially outer legs preferably include an angle ⁇ 90 °.
  • the Aufbieschululter has a radially inwardly and counter to a direction of insertion of the mounting spindle inclined web, which preferably includes an angle of ⁇ 90 ° with a radial outer edge of the mounting spindle.
  • the Mit supportivekante forms due to their preferred acute-angled design a blade-like leadership in the direction of rotation of the wire thread insert, which engages positively due to their arrangement in the Mitauerkerbe the wire thread insert. This interlocking engagement ensures a rotationally fixed connection between the mounting spindle and the wire thread insert in the screwing-in direction or installation direction of the wire thread insert in the component opening.
  • the Aufbügelschulter acts, however, only with a rotation of the mounting spindle against the installation direction, ie when the mounting spindle is rotated away from the wire thread insert. Due to its preferred angular configuration, when the installation spindle is unscrewed, the entrainment peg runs in an angle which is formed by the bending shoulder and the radially inner wall of the component opening. Upon further rotation, the bending shoulder presses the driving pin against the radially inner component opening, so that the driving pin is permanently deflected back into the outer contour of the wire thread insert. will be. In this case, the Aufbieschulultcr slides against the insertion direction of the wire thread insert along the driving pin.
  • the Aufbiege- shoulder is formed curvilinear. Accordingly, the Aufbieschululter referred to the installation spindle in its course radially inwardly to an increasing curvature. In addition, it is preferred that the Aufbieschululter is integrally connected via the at least one length-reduced thread integral with the driving edge.
  • the present invention comprises a further alternative of the installation tool for the wire thread insert.
  • the wire thread insert consists of a cylindrical helix having a plurality of helically wound turns of a wire, in which a first turn has a driving notch with a notch, projecting over a bending area into an interior of the helix.
  • the installation tool includes the following features: a rotatable mounting spindle having a drive end for rotating the mounting spindle and a functional end for installing the wire threaded insert in a component opening in which the functional end has a first threaded portion with a first core diameter and a second threaded portion with a second core diameter, wherein the first threaded portion is disposed between the drive end and the second threaded portion, wherein the second core diameter is greater than the first core diameter and wherein the functional end in a thread has a recess which forms an undercut for the driving pin of the wire thread insert in the screwing of the wire thread insert.
  • the second alternative of the installation tool according to the invention is characterized by a functional end with two mutually adjacent threaded areas.
  • the first thread essentially serves to receive the wire thread insert to be installed.
  • the wire thread insert is in this threaded area, it is preferably installed in a component opening of a component.
  • the second threaded portion having a larger core diameter than the first threaded portion is arranged such that when removing the mounting spindle from the installed Drahtgevveinintra this second threaded portion must be screwed through the installed wire thread insert.
  • the drive pin Due to the larger core diameter of the second threaded area, which screws of the mounting spindle from the wire thread insert forces through the wire thread insert, the drive pin is bent with the cam notch radially outwardly into the circumferential outer contour of the wire thread insert. Since in the bending area preferably different mechanicallyszuslitze superimposed, the driver pin is bent back into the circumferential contour of the wire thread insert. Preferably, after the bending back of the driving pin is dimensionally accurate or instructive arranged in the outer contour of the wire thread insert or in the thread of the mounting hole of the wire thread insert. In order to hold the wire thread insert spindled or plugged on the functional end during installation rotatably, the above-mentioned recess is provided.
  • This depression is preferably arranged in the first threaded region, preferably within a rotation angle of 270 ° beginning at or adjacent to the second threaded region.
  • the radially inwardly bent driver pin with driver notch snaps into the groove during spindling or on top of the wire thread insert on the functional end.
  • the second core diameter is at least 0.1% larger than the first core diameter, preferably in a range ⁇ 0,1% to 2% larger than the first core diameter.
  • the second threaded portion extends over a rotation angle of at least 180 ° about the longitudinal axis of the mounting spindle.
  • the present invention also comprises an installation method of the wire thread insert with a bendable, non-detachable driving pin and a Mitauerkerbe mith hat an installation tool in a receiving thread of a component, preferably with an installation tool according to claim 1 or 7, comprising the following steps: spindling or attaching the wire thread insert a functional end of a mounting spindle of the installation tool such that the driver notch positively coupled to a driver edge or a radial recess of the installation tool and the Wire thread insert rotates with the installation tool, screwing the wire thread insert into the receiving thread by turning the mounting spindle in a first direction of rotation, bending the driving pin back into the receiving thread by rotating the mounting spindle in a second direction of rotation and unwinding or removing the mounting spindle from the wire thread insert with the pin bent back.
  • a radial bending back of the entrainment pin by a Aufbschulschulter or a second threaded portion with increased core diameter compared to a first threaded portion at the functional end of Eininstallpindcl it is further preferred that a radial bending back of the entrainment pin by a Friedbschulschulter or a second threaded portion with increased core diameter compared to a first threaded portion at the functional end of Eininstallpindcl.
  • FIG. 1 is an end view of a preferred embodiment of a wire threaded insert with Wegbiegbarem driving pin and Mit supportivekerbe,
  • Fig. 2 is an end view of another preferred embodiment of a
  • 6 is a sectional side view of the preferred first alternative of the installation tool
  • 7 shows a side sectional view of a preferred second alternative of the installation tool
  • Fig. 8 is a schematic view of the two threaded portions of the preferred second alternative of the installation tool.
  • FIG. 9 is a flow chart of a preferred embodiment of the inventive installation method of the wire thread insert in an internal thread of a component opening of a component with an installation tool.
  • the present invention relates to different alternatives of an installation tool for installing a wire thread insert 1 in a component opening with internal thread of a component.
  • the use and dimensioning of wire thread inserts 1 is known in the art.
  • the wire thread insert 1 is wound from a wire known material and known cross-sectional shape.
  • the wire thread insert 1 comprises a cylindrical helix 20 consisting of a plurality of helically wound turns 30.
  • the helix 20 has a first end 22 and a second end 24.
  • a driver pin 50 is arranged with a driver notch 42, which projects in a radial plane of the cylindrical helix 20 into the interior of the cylindrical helix 20.
  • the driving pin 50 is connected via a bending region 40 to a first turn 32 of the cylindrical helix 20 at its first end 22.
  • the driving pin 50 does not protrude in a straight line radially into the interior of the cylindrical helix 20, as can be seen from FIGS. 1 and 2. Instead, the driving pin 50 has approximately the shape of a circular arc.
  • the circular arc of the driving pin 50 preferably has the same or a larger radius than the cylindrical helix 20, so that the driving pin 50 from the interior of the cylindrical helix 20 in the course of the first turn 32 is permanently bent back. It is also preferred to form the circular arc of the driving pin 50 with a radius which differs by a maximum of ⁇ 1% from the radius of the cylindrical helix 20.
  • the driving pin 50 closes with the peripheral contour of the wire thread insert an angle ⁇ .
  • the angle ⁇ is less than 90 ° and forms an acute angle. It has been shown that in the case of a driving pin 50 with a length of 0.2 U to 0.4 U, this angle can be advantageously reduced from an angle ⁇ of 5 ° ⁇ ⁇ ⁇ 50 °, preferably 1 ° ⁇ ⁇ ⁇ 35 ° Bend back the circumferential contour of the wire thread insert 1. It has an advantageous effect that the driving pin 50 rests with its length on the installation tool (see below) via frictional engagement. As a result, multiaxial mechanical stress state is transmitted into the bending region 40, which ensures the permanent bending back of the entrainment spigot.
  • the driver pin 50 is preferably arranged in an angle range of 5 ° ⁇ 45 °, preferably 5 ° ⁇ a ⁇ 30 ° ,
  • the size U denotes the circumference of the wire thread insert 1, which can be calculated from the radius or the diameter of the wire thread insert 1.
  • the bending region 40 has the function of connecting the driving pin 50 in a bendable and tension-resistant manner to the remainder of the wire thread insert 1. This ensures that when installing the wire thread insert 1 in a receiving thread A of a component B, a sufficiently high torque can be applied to the wire thread insert 1 via the driving pin 50. Based on this structural basis, the wire thread insert 1 can be pulled over the driving pin 50 into the receiving thread A, without the driving pin 50 breaks off. In order to be able to transfer the required torque for screwing in the wire thread insert into the component opening onto the wire thread insert, the wire thread insert has the catch notch 42.
  • the driver notch 42 is in the insertion direction R (see FIGS. 1, 2) from a radial depression on a radial inner side of the bending region 40.
  • the driver notch 42 has an undercut 43, which rotatably coupling (in Einwindrtchtung R) an installation tool (see below) to the Mit Conversekerbe 42 and a co-rotation of the wire thread insert 1 allowed.
  • the driver notch 42 is positioned such that the undercut 43 is disposed within the circumferential contour of the wire thread insert 1.
  • the undercut 43 protrudes radially inwardly beyond the inner edge 25 of the wire thread insert 1. In this way, a coupling between installation tool and wire thread insert is supported.
  • the bending region 40 ensures that the driving pin 50 permanently in the receiving thread A of the component B or generally in the course of the first winding 32nd is bendable back.
  • the bending region 40 has the same mechanical, thermal, chemical and geometric properties as the wire of the cylindrical helix 20.
  • the wire in the bending region 40 is preferably changed in its bending properties compared to the wire of the cylindrical helix 20.
  • This change in the bending region 40 is generated mechanically, geometrically, thermally, chemically or in another manner according to different embodiments of the present invention.
  • the wire of the bending portion 40 is tapered in cross section as compared with the wire of the cylindrical coil 20. This is realized via the driver notch 42.
  • the taper or notch 42 is formed such that a small notch factor arises when the entrainment pin 50 is bent back and therefore the entrainment pin 50 does not break off during the bending back.
  • the cam groove 42 is disposed on the radially inner side of the bending portion 40.
  • the Mitauerkerbe is shaped and positioned so that they can run to screw the wire thread insert 1 into a receiving thread in a located in the contour of the screwdriver driving blade or edge and hooked to this form-fitting.
  • the side of the driver notch 42 disposed in the direction of insertion of the wire thread insert 1 forms an undercut, against which the driver blade rests in a form-fitting manner.
  • the radially inwardly bent driver pin 50 supports the engagement of the driver blade or edge in the driver notch 42, because at least the upstream in the screwing direction side of the driver notch 42 projects radially inwardly over the peripheral contour into an interior of the wire thread insert 1.
  • the Mitauerkerbe 42 realized simultaneously two functions. On the one hand, it allows the engagement and locking of the driver blade or edge of an installation tool for the wire thread insert 1. On the other hand, it represents a taper of the bending region 40, which supports a bending back of the driving pin 50 in the receiving thread of the component.
  • the bending region is mechanically machined for this purpose. Suitable methods include notching, milling. Punching, forging, grinding, polishing, cold striking, pickling, lapping to reduce the cross section of the bending region 40. At the same time, it must be ensured that the corrosion properties in the bending area 40 are restored after processing.
  • Wire thread insert 1 for installation in a Aufhahmege thread of a component comprising the following features: a cylindrical coil 20 consisting of a plurality of helically wound turns 30 of a wire, a first 22 and a second end 24, wherein a provided at the first end 22 first turn 32 has a over a bending portion 40 into an interior 26 of the coil 20 projecting male pin 50 with a cam groove 42 and wherein the Milisingzapfen 50 inseparably connected to the first turn 32 , via the bending region 40 from the interior 26 of the coil 20 can be bent back and the wire thread insert 1 via the Mitauerkerbe 42 and the Mit supportivezapfen 50 can be installed.
  • the driving pin 50 of the wire thread insert 1 is permanently bendable back into the receiving thread A of the component B.
  • the driving pin 50 is preferably a circular arc whose journal radius is approximately equal to a radius of the first turn 32 of the cylindrical helix 20.
  • the driving pin 50 of a wire thread insert 1 installed in the receiving thread A of the component B can be bent out of the inside of the cylindrical helix 20 so that the receiving thread A is gauged with the wire thread insert 1 .
  • a screw or a threaded mandrel with a negligible additional torque or friction torque due to the bent-back entrainment pin 50 can be screwed into the receiving thread A with the wire thread insert 1.
  • the gauge stability of the receiving thread A with the wire thread insert 1 is detectable in that a manual screwing of the threaded plug gauge according to the tolerance class 6H, preferably the Toleranzklassc 5H, is guaranteed.
  • the driving pin 50 is of different lengths (see above).
  • the driving pin 50 extends over a circular arc ARZ having a length Lz of 0.05 U ⁇ Lz ⁇ 0.4 U, preferably 0.2 U ⁇ Lz ⁇ 0.4 U or 0.05 U ⁇ Lz ⁇ 0, 1 U.
  • U denotes the outer circumference of the wire thread insert.
  • the length Lz of the driving pin is measured in each case beginning in the bending region 40 to the free end of the driving pin 50.
  • Figs. 1 and 2 show two preferred embodiments of a wire thread insert 1, which are installed by means of installation tools described in more detail below in a component opening. Fig.
  • FIGS. 4-6 and 7-8 Two alternative preferred constructions of the installation tool 60; 60 'are illustrated schematically in FIGS. 4-6 and 7-8.
  • the alternative installation tools 60; 60 ' are the same structural details with the same reference numerals.
  • descriptions of these same constructive details apply equally to both alternatives of the installation tool 60; 60 ', even if they have only been discussed in the context of an alternative.
  • the installation tools 60; 60 ' each comprise a rotatable mounting spindle 62 with a drive end 64 and a function end 70; 70 '.
  • the mounting spindle 62 is manually or mechanically via the drive end 64 with a corresponding, for example. Electromotive. Drive (not shown) rotatable.
  • the wire thread insert 1 is fastened or arranged on the functional end 70: 70 '(step S1).
  • the functional end 70; 70 ' runs on the front side of the wire thread insert 1, which faces the end face of the wire thread insert 1 with driving pin 50.
  • the mounting spindle 62 is rotated clockwise or counterclockwise.
  • the functional end 70; 70 'of the mounting spindle 62 to be made smaller in diameter than an inner diameter of the wire thread insert 1.
  • the gauge integrity of the built-in wire thread insert is compromised, screwing in a screw in the installed wire thread insert is possible.
  • a preferred embodiment of the first alternative of the installation tool 60 is shown in Figs. 4-6.
  • the functional end 70 of the mounting spindle 62 has a fitting to the wire thread insert 1 formed threaded portion 72.
  • the threaded section 72 preferably extends over at least a partial length of the functional end 70.
  • this partial length corresponds to at least one axial length of the wire thread insert 1, so that it can be spindled onto the functional end 70 in its full length , It is also preferable to make the threaded portion 72 shorter.
  • a receiving region 74 of smaller diameter compared to the threaded portion 72 connects. This receiving area 74 allows a run-up and later supporting and guiding the wire thread insert 1, without the function of the threaded portion 72 is limited.
  • the threaded portion 72 comprises a circumferential thread which extends helically around the mounting spindle 62 at the functional end 70.
  • the thread is formed by two radially outwardly projecting opposite flanks, between which the wendclförmig bent wire of the wire thread insert 1 is guided.
  • the thread 72 is broken (breakthrough 73).
  • Inside of the opening 73 of the wire of the winch Drahtge- insert 1 over the length range of a rotational angle ⁇ is not on both sides of preferably at least 360 0 supported or guided by flanks of the thread.
  • the functional end 70 comprises a length-reduced first thread 72a and a second thread 72b.
  • the opening 73 is formed by a front axial extension 80 of the functional end 70, which protrudes counter to the fastening direction B of the wire thread insert 1 from the end face of the functional end 70.
  • the extension 80 extends only over part of the front side, as can be seen in Figs. 4 and 5. As a result, a part of the frontal surface of the functional end 70 springs back behind the extension 80, whereby the opening 73 is formed.
  • the extension 80 is defined along a circumferential path through the length-reduced first thread path 72a.
  • the length-reduced first thread 72a and thus the one side of the extension 80 preferably extend over an arc length S defined by an angle ⁇ .
  • the angle ⁇ has a preferred size of 150 ° ⁇ ⁇ ⁇ 240 °.
  • the front end of the length-reduced first thread 72 and thus also the front end of the extension 80 has a driving edge 82.
  • the driver edge 82 preferably extends parallel to the longitudinal axis of the mounting spindle 62. However, the course of the driver edge 82 may also deviate from this orientation as long as the functional interaction between the driver notch 42 and the driver edge 82 is ensured. If, in fact, the functional end 70 is screwed into the wire thread insert 1 with the driver notch 42 in the screwing direction R (step S 1), the driver edge 82 automatically runs into the driver notch 42 (step S2).
  • the driving edge 82 engages in the undercut 43 so that in the direction of insertion R a rotationally fixed connection between the mounting spindle 62 and wire thread insert 1 is formed.
  • the non-rotatable connection ensures that the wire thread insert 1 is rotated by rotation of the mounting spindle 62 and in this way can be installed in an internal thread of a component opening of a component.
  • the driving edge 82 is arranged offset radially inwardly relative to a core radius nc of the length-reduced first thread 72a.
  • the core radius r ⁇ is shown in Figs. 4 and S.
  • the cam edge 82 is spaced from the central axis of the installation spindle 62 by the length IMK.
  • the length IMK preferably comprises a range of nc>IMK> 1, 4 nc, in order to ensure optimum interaction of the driver notch 42 and the driver edge 82.
  • step S3 the driver edge 82 pulls the wire thread insert 1 in the direction of insertion R by the rotationally fixed engagement on the undercut 43.
  • the first turn 32 adjoins the driving pin 50, to the length-reduced first thread 72a and forms with him an additional frictional connection.
  • This frictional connection supports the transmission of the installed torque from the mounting spindle 62 to the wire thread insert l.
  • the installing and on the wire thread insert 1 to be transmitted torque is distributed to the driver edge 82 and the length-reduced first thread 72a. Therefore, it is preferable to set the length of the length-reduced first thread 72a (see angle ⁇ , top) in dependence on the torque to be transmitted. It follows that with a larger torque to be transmitted between the installation spindle 62 and wire thread insert 1, the reduced length first thread 72a is formed longer than a smaller torque to be transmitted.
  • the driver edge 82 is formed by a radially inner and a radially outer leg. These two legs enclose an angle of ⁇ 90 °, preferably ⁇ 50 ° and more preferably ⁇ 40 °. It is also preferred that the length-reduced first thread 72a terminates in an axial web, which forms the driver edge 82 by its width.
  • the length-reduced first thread 72a runs out at its end facing away from the insertion direction R in a (2004)bieschululter.
  • the Aufbiegcschulter 84 consists of a relative to the core radius r straight angled surface (not shown) or from a curvilinear surface.
  • the embarkbügelschulter 84 forms an axial boundary surface 85 of the extension 80.
  • the Aufbieschululter 84 with the outer edge of the mounting spindle 62 includes an angle 6 ⁇ 90 °, preferably 90 °> ⁇ > 30 °, a.
  • the bending shoulder 84 consists of a curvilinear surface
  • the angle ⁇ between the tangent Tg on the surface 85 is measured at the intersection with the outer edge of the mounting spindle 62 and the outer edge of the mounting spindle 62 (see FIGS. 4 and 5).
  • the Aufbieschululter 84 is formed curvilinear. The curvilinearly shaped bending shoulder 84 has pulled on the installation spindle 62 in the course radially inwardly increasing curvature.
  • the Aufbieschululter 84 is integrally connected via the reduced-length thread 72a and directly to the driving edge 82.
  • the extension 85 is stably formed and forms a supplementary radial support for the length-reduced first thread 72a.
  • the mounting spindle 62 is rotated counter to the insertion direction R.
  • Step S4 Upon further rotation of the mounting spindle 62 and thus the function end 70, the Aufbieschulter 84 comes into contact with the driving pin 50. About the further rotation of the function end 70 against the insertion direction R presses the Aufbieschulter 84th During the bending back of the entrainment pin 50 (step S5), the bending area 40 is subjected to such a mechanical load that the entrainment pin 50 is moved in such a way that the drive pin 50 moves radially outwardly into the peripheral contour of the wire thread insert 1 permanently bent back into the circumferential contour of the wire thread insert 1.
  • the Aufbieffler 84 bends the weakened by the Mit Conversekerbe 42 driving pin 50 radially into the internal thread of the component opening.
  • the driving pin 50 is thereby bent and bent over the envelope contour of a screw and a threaded sleeve out radially outward.
  • the insertion torque of a screw into the wire thread insert 1 with the driver pin 50 bent back is approximately zero.
  • the gauge integrity of the wire thread insert 1 with bent-back pin 50 achieved in this way means that the bent-back pin 50 does not disturb the thread predetermined by the wire thread insert 1. Proof of such gauge integrity is given in accordance with tolerance class 6H, after which the lignite is manually screwed into the installed wire thread insert 1 with bent-back pin 50. (See also ISO standard 965-1)
  • a preferred embodiment of the second alternative of the installation tool is shown schematically in FIG. Unlike the first alternative of the installation tool, it has another function end 70 '.
  • the preferred functional end 70 ' comprises a first 90 and second threaded portion 92 disposed adjacent the free end of the working end 70 ' opposite the drive end 64.
  • both threaded portions 90, 92 directly adjacent to each other to ensure a smooth transition of the wire thread insert 1 between the threaded portions 90, 92 when screwing and unscrewing from the functional end 70 ' .
  • a thread is provided to match the shape of the wire helix of the wire thread insert 1.
  • This thread of the second threaded portion 92 has the same characteristics as the thread 72b of the working end 70 (see above).
  • shape and size of the thread of the wire thread insert 1 can easily enter into the second threaded portion 92.
  • the second threaded region 92 can be characterized by a core radius r ⁇ 2, as shown in FIG.
  • the core radius r ⁇ 2 defines the distance between the longitudinal axis of the working end 70 ' and the radial outside of the thread core of the second threaded portion 92.
  • a thread core of the first thread portion 90 is larger than the thread core of the second thread portion 92.
  • the core radius r ⁇ 1 of the first thread portion 90 is larger than the core radius r ⁇ 2 of the second thread portion 92.
  • first core diameter 2r ⁇ ⁇ at least 0, 1% greater than the second core diameter 2 r ⁇ 2, preferably in a range ⁇ , ⁇ % to 2% greater than the first core diameter 2r ⁇ .
  • the first threaded portion 90 or the thread of the first threaded portion 90 extends at least over a rotation angle ⁇ > 180 ° about the longitudinal axis of the mounting spindle 62. According to the direction of rotation of the first threaded portion 90 of this angle ⁇ is measured left or right. Preferably, the first threaded portion 90 extends over a rotational angle in the range of 180 ° ⁇ ⁇ ⁇ 720 °.
  • the second threaded portion 92 has a radial recess 94 into which the cam groove 42 engages with an undercut 43.
  • the radial recess 94 is preferably formed as a bore, milling or Senkrod mich. In addition, it is preferable to extend the recess 94 along the thread of the second threaded portion 92 over a certain length. According to one embodiment of this invention, this length corresponds to the length of the driving pin 50, so that it is easier to hold in the recess 94 in a rotationally fixed manner.
  • depression 94 is preferably arranged in the second thread projection 92, it could also be arranged in the first thread region 90.
  • the wire thread insert 1 is spindled or screwed onto the functional end 70 '. This is done manually or automatically. Since the wire thread insert 1 can expand radially during spindling, because it is not restricted by a component wall, the wire thread insert 1 is spindled onto the first 90 and the second threaded portion 92 without special mechanical effort (step S1). At the end of the spindling, the driving pin 50 and / or the driving notch 42 rotatably connects to the recess 94 and therefore to the functional end 70 '(step S2).
  • the wire thread insert is screwed into the desired depth of the internal thread of the component opening by means of the installation spindle 62 (step S3).
  • the mounting spindle 62 is rotated counter to the insertion direction R (step S3).
  • first the second threaded region 92 and then the first threaded region 90 are screwed out of the wire thread insert 1, wherein the first threaded region 90 passes through the entire wire thread insert 1.
  • the driving notch 42 is first pressed radially out of the recess 94. As soon as the first threaded region 90 reaches the receiving pin 50, the larger core radius r ⁇ forces the driving pin 50 radially outwardly such that it is permanently bent back into the internal thread of the component opening or the peripheral contour of the wire thread insert 1 (step S5). Since preferably the driving notch 42 represents a weakening of the bending region 40 of the wire thread insert 1, this supports the bending back of the driving pin 50.
  • the driving pin 50 Due to the increased core diameter or core radius r ⁇ of the first threaded portion 90 experiences the driving pin 50 in addition to the radially outward bending force on the friction of the driving pin 50 on the radial outside of the two threaded portions 90, 92, in particular through the threaded portion 90, an additional tangential force. Due to this additional force due to the friction, a multiaxial mechanical stress state preferably occurs in the bending region 40. This causes an exceeding of the material yield point in the bending region 40, so that a permanent radial bending back of the driving pin 50 can be realized. Therefore, the driving pin 50 can be bent over the envelope contour of a screw and a threaded mandrel beyond radially outward and calibrated there.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Harvester Elements (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Wire Processing (AREA)

Abstract

Les outils d'installation (60) selon l'invention sont adaptés à un insert de filetage en fil métallique (1) qui comprend une hélice cylindrique (20) présentant une pluralité d'enroulements (30) d'un fil, enroulés de façon hélicoïdale, et un tourillon d'entraînement (50) qui présente une encoche (42) et qui fait saillie dans un espace intérieur de l'hélice par le biais d'une zone de flexion (40). L'outil d'installation (60) présente les caractéristiques suivantes : une broche de montage rotative (62) comprenant une extrémité d'entraînement (64) servant à faire tourner la broche de montage et une extrémité fonctionnelle (70) servant à l'installation de l'insert de filetage en fil métallique (1), l'extrémité fonctionnelle comprenant au moins un pas de filetage de longueur réduite dans la direction périphérique, qui présente à une première extrémité un bord d'entraînement destiné à s'insérer dans une encoche d'entraînement de l'insert de filetage en fil métallique et à une deuxième extrémité un épaulement de recourbement servant à cintrer radialement vers l'extérieur le tourillon d'entraînement (50) de l'insert de filetage en fil métallique.
EP15797064.1A 2014-11-24 2015-11-17 Outil d'installation pour insert de filetage en fil métallique à tourillon de montage pouvant être recourbé et procédé d'installation Active EP3212361B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014223905.2A DE102014223905A1 (de) 2014-11-24 2014-11-24 Installationswerkzeug für einen Drahtgewindeeinsatz mit zurückbiegbarem Einbauzapfen sowie einInstallationsverfahren
PCT/EP2015/076755 WO2016083188A1 (fr) 2014-11-24 2015-11-17 Outil d'installation pour insert de filetage en fil métallique à tourillon de montage pouvant être recourbé et procédé d'installation

Publications (2)

Publication Number Publication Date
EP3212361A1 true EP3212361A1 (fr) 2017-09-06
EP3212361B1 EP3212361B1 (fr) 2021-01-06

Family

ID=54557403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15797064.1A Active EP3212361B1 (fr) 2014-11-24 2015-11-17 Outil d'installation pour insert de filetage en fil métallique à tourillon de montage pouvant être recourbé et procédé d'installation

Country Status (7)

Country Link
US (1) US10773365B2 (fr)
EP (1) EP3212361B1 (fr)
CN (1) CN107872995B (fr)
DE (1) DE102014223905A1 (fr)
DK (1) DK3212361T3 (fr)
HU (1) HUE053771T2 (fr)
WO (1) WO2016083188A1 (fr)

Cited By (1)

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EP4197699A1 (fr) 2021-12-14 2023-06-21 Böllhoff Verbindungstechnik GmbH Broche de montage intégrée, outil d'installation destiné au montage d'un insert fileté métallique et procédé d'installation

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CN109807812A (zh) * 2019-04-03 2019-05-28 厦门弘诚绝缘材料有限公司 一种自攻螺套防抱死安装工具
JP6861267B1 (ja) * 2019-12-19 2021-04-21 セイコーインスツル株式会社 回転ツール

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US2363789A (en) 1943-12-16 1944-11-28 Aircraft Screw Prod Co Wire coil insert
DE1016066B (de) 1953-12-17 1957-09-19 Heli Coil Corp Loesbare Sperrschraube mit einer Drahtspule als Einsatz zwischen Sperrschraube und Gewindebohrung
US3348293A (en) * 1966-05-12 1967-10-24 Heli Coil Corp Wire coil installing tool
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US5212865A (en) * 1992-07-20 1993-05-25 Usi Corporation Tool for installation of tanged and tangless wire inserts
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DE102010017739B4 (de) * 2010-07-05 2023-03-30 Böllhoff Verbindungstechnik GmbH Gewindepanzerndes Element, Schraube mit gewindepanzerndem Element, Installationsverfahren dafür, ein Bauteil mit installiertem gewindepanzernden Element, Wickelspindel zum Herstellen eines gewindepanzernden Elements sowie Herstellungsverfahren eines gewindepanzernden Elements
DE102010050735A1 (de) * 2010-11-08 2012-05-10 Böllhoff Verbindungstechnik GmbH Drahtgewindeeinsatz mit zurückbiegbarem Einbauzapfen sowie seine Herstellung und Installation
JP2015071216A (ja) 2013-10-04 2015-04-16 越野建設株式会社 アンカー引抜具

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4197699A1 (fr) 2021-12-14 2023-06-21 Böllhoff Verbindungstechnik GmbH Broche de montage intégrée, outil d'installation destiné au montage d'un insert fileté métallique et procédé d'installation
WO2023110180A1 (fr) * 2021-12-14 2023-06-22 Böllhoff Verbindungstechnik GmbH Broche d'installation formée d'un seul tenant, outil d'installation pour installer un filet rapporté et procédé d'installation

Also Published As

Publication number Publication date
EP3212361B1 (fr) 2021-01-06
HUE053771T2 (hu) 2021-07-28
CN107872995B (zh) 2020-05-12
DK3212361T3 (da) 2021-04-12
US20170361440A1 (en) 2017-12-21
WO2016083188A1 (fr) 2016-06-02
CN107872995A (zh) 2018-04-03
US10773365B2 (en) 2020-09-15
DE102014223905A1 (de) 2016-05-25

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