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DE-102024133182-A1 - Threaded insert, use of the threaded insert and device with a threaded insert

DE102024133182A1DE 102024133182 A1DE102024133182 A1DE 102024133182A1DE-102024133182-A1

Abstract

The invention relates to a threaded insert for a device for a substrate processing machine, comprising a cylindrical outer surface with an interrupted external thread, one flank of which is formed perpendicular to the outer surface. The invention also relates to a use of the threaded insert and a device for a substrate processing machine with a threaded insert.

Inventors

  • Erik Bellon
  • Jörg Brundisch
  • Marc Brundisch
  • Jürgen Mann
  • Stefan Quentin

Assignees

  • KOENIG & BAUER AG

Dates

Publication Date
20260513
Application Date
20241113

Claims (15)

  1. Threaded insert (01) for a device for a substrate processing machine with a cylindrical outer surface (02) having an external thread (04) having interruptions (03), characterized in that a flank (05) of the external thread (04) is formed perpendicular to the outer surface (02).
  2. Threaded insert (01) according to Claim 1 , wherein the flank (05) formed at right angles to the outer surface (02) forms an angle (α) of 25° to 35°, in particular 30°, with the other flank (06) of the external thread (04).
  3. Threaded insert according to Claim 1 or 2 , wherein the flank (05) formed at right angles to the outer surface (02) is formed in the opposite direction to a joining direction (07) of the thread insert (01).
  4. Threaded insert (01) according to Claim 1 , 2 or 3 , wherein the threaded insert (01) comprises or consists of brass.
  5. Threaded insert (01) according to Claim 1 , 2 , 3 or 4 , wherein a particularly metric internal thread (08) is provided.
  6. Threaded insert (01) according to Claim 1 , 2 , 3 , 4 or 5 , wherein three or exactly three interruptions (03) of the external thread (04) are provided in the axial direction of the thread insert (01), in particular continuous interruptions (03).
  7. Threaded insert (01) according to Claim 1 , 2 , 3 , 4 , 5 or 6 , wherein the interruptions (03) of the external thread (04) are semicircular and open to the outside.
  8. Threaded insert (01) according to Claim 1 , 2 , 3 , 4 , 5 , 6 or 7 , wherein the breaks (03) of the external thread (04) are arranged offset from each other by an angle (β) of 120° when viewed in the joining direction (07).
  9. Threaded insert (01) according to Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 or 8 , wherein the interruptions (03) of the external thread (04) in the joining direction (07) have a radius of 1.5 mm.
  10. Threaded insert (01) according to Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 or 9 , wherein the distance between equal flanks (05, 06) of the external thread (04) is 1.5 mm to 2 mm, in particular 1.75 mm.
  11. Threaded insert (01) according to Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 or 10 , wherein the outer diameter of the cylindrical outer surface (02) is up to or exactly 9.4 mm.
  12. Threaded insert (01) according to Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 or 11 , wherein the axial extent of the threaded insert (01) and/or the cylindrical outer surface (02) is up to 10 mm, preferably 8 mm.
  13. Threaded insert (01) according to Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 or 12 , wherein the outer diameter of the threaded insert (01) is up to or exactly 11.5 mm.
  14. Use of the threaded insert (01) according to Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 or 13 for screwing into a plastic element (09).
  15. Device for a substrate processing machine with a threaded insert (01) in particular according to Claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 or 14 , wherein the threaded insert (01) is screwed into a plastic element (09) and the plastic element (09) can be connected and/or joined to a holder (10) via the threaded insert (01).

Description

The invention relates to a threaded insert, a use of the threaded insert and a device for a substrate processing machine with a threaded insert. In particular, the invention relates to a self-locking force-fit connection preferably between comparatively soft plastic elements, in particular plastic sliding elements, and solid structural elements. It is known to achieve a force-fit connection between two workpieces by using a threaded element with an outer contour (e.g., full thread, interrupted thread, radial or axial notches) for the force-fit connection to the first workpiece and an inner contour (usually an internal thread for receiving screw threads) for the force-fit connection to the second workpiece. The threaded element is generally screwed in or hammered in using a self-tapping thread. A disadvantage is that a sufficiently high axial tensile force cannot be applied to securely connect the two workpieces. This is due, on the one hand, to the low elongation at break, particularly of plastics such as plastic sliding elements, and on the other hand, to the geometry of commercially available solutions. If an axial force is applied to the threaded element, for example via a screw, it can cause the surrounding material, especially plastic, to buckle, potentially leading to the threaded element being pulled out. Repeated loosening and tightening of this connection further exacerbates this effect. From the DE 69 27 986 U A self-locking threaded insert for positive-locking interaction with a threaded hole in a carrier body is known, comprising a cylindrical body with an external threaded surface extending over its entire length for screwing with an associated threaded surface in the carrier body and an internal threaded surface also extending over its entire length for screwing with the screw shank of an associated threaded fastening element, with a circumferential groove arranged at a distance from both ends of the insert, which is essentially machined up to the flank diameter of the external thread, and with at least one region of the groove that is plastically deformed radially inwards, so that the internal threaded surface has at least partial deformations on the inside, on which the threaded fastening element is held self-lockingly. From the DE 10 2009 048 160 A1 A formable wire thread insert for reinforcing a screw-in opening of a component is known, comprising a cylindrical spiral formed from a helically wound wire, the adjacent windings of which are arranged such that a closed cylindrical spiral wall is present, while at least one end of the cylindrical spiral has a fastening flange that extends radially outwards beyond the cylindrical spiral wall and with which the wire thread insert can be anchored in the component, and/or one end of the cylindrical spiral is designed to be flat in order to form a flat axial end face of the cylindrical spiral. The invention aims to avoid the aforementioned defects. In particular, it should enable an applied axial force to be distributed over as large an area as possible and/or to optimally inhibit relative movement between the flanks of the threaded insert and the surrounding material, especially plastic. Furthermore, it should counteract deformation or buckling of the surrounding material, especially plastic. The problem is solved according to the invention by the features of an independent claim. The advantages achievable with the invention consist in particular of the fact that an improved connection between two workpieces can be achieved. This can be achieved, in particular, by significantly increasing the flank angles of the outer contour described as a thread compared to commercially available solutions, and simultaneously adapting the flank shape to an asymmetrical profile (saw thread) which is especially suitable for high, unidirectional axial loads. Advantageously, this achieves the transmission of significantly higher tightening torques via the threaded insert, particularly without it twisting (which would lead to the destruction of a self-tapping thread) or deforming the surrounding material, especially a plastic, so much that the threaded insert is pulled axially through the workpiece and thus loses its force-locking effect. Exemplary embodiments of the invention are shown in the drawings and are described in more detail below. They show: 1 a threaded insert; 2 a side view of the threaded insert; 3 a cross-section from the previous figure; 4 an enlarged section of the previous figure; 5 a top view of the threaded insert; 6 a schematic representation of a connection using the threaded insert; 7 a perspective view of plastic sliding elements attached to a sheet metal surface using threaded inserts; 8 A representation of a device for processing sheets with plastic sliding elements attached by means of threaded inserts. The 1 Figure 1 shows a threaded insert 01 for a device for a substrate or sheet processing machine, with a cylindrical outer surface 02 and