EP3676031A1 - Procédé et dispositif de séparation sans bavure d'un fil et élément de fil séparé correspondant - Google Patents

Procédé et dispositif de séparation sans bavure d'un fil et élément de fil séparé correspondant

Info

Publication number
EP3676031A1
EP3676031A1 EP19736998.6A EP19736998A EP3676031A1 EP 3676031 A1 EP3676031 A1 EP 3676031A1 EP 19736998 A EP19736998 A EP 19736998A EP 3676031 A1 EP3676031 A1 EP 3676031A1
Authority
EP
European Patent Office
Prior art keywords
wire
forming
sections
forming unit
unit
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Withdrawn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
EP19736998.6A
Other languages
German (de)
English (en)
Inventor
Giuseppe Zana
Fabrizio Giuradei
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.)
Gehring Technologies GmbH and Co KG
Original Assignee
Gehring E Tech 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 Gehring E Tech GmbH filed Critical Gehring E Tech GmbH
Publication of EP3676031A1 publication Critical patent/EP3676031A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F11/00—Cutting wire

Definitions

  • the invention relates to a method for burr-free
  • the invention relates to a correspondingly separated piece of wire and a hairpin.
  • Wire sections are cut to length and cut, which are welded together after positioning on the stator.
  • DE 2 245 771 describes a device and a method for the coupling of wire pins.
  • the wire sections are usually cut off by shearing, end faces being formed on the wire ends, the edges of which are unbroken, i.e. sharp-edged and with burrs (shear ridges). These edges can, unless they are included in an additional one
  • Step laboriously removed for example, manually, when installing the plug-in coils in an insulation
  • the invention has for its object to enable a reliable and burr-free cutting of wires with simple design means.
  • the invention solves this problem by a method with the features of claim 1.
  • the method is characterized by several steps, which are described below.
  • a (burr-free) shaping of the wire at a longitudinal wire position takes place in a first shaping step by moving two shaping sections of a first shaping unit opposite one another in a first plane along a first movement axis.
  • Forming step tapered from two opposite sides, for example from two narrow sides.
  • the forming sections of the first forming unit are always spaced apart from one another, so that a tapered one
  • Wire cross section remains.
  • the wire is then shaped at the same longitudinal wire position in a second forming step by moving two forming sections of a second forming unit opposite one another in a second plane along a second one Motion axis.
  • the already tapered wire cross section is tapered from two further opposite sides, for example from two broad sides.
  • a material web remains at the longitudinal wire position which, compared to the original cross-sectional shape of the
  • Wire is arranged offset inwards.
  • the material web can have the same cross-sectional center as the original cross-section of the wire.
  • the material web is offset inwards on at least two, preferably all, opposite sides, equally far from the original cross-sectional shape.
  • the wire sections arranged before and after the longitudinal wire position, the intended separation point are still bonded to one another via the material web.
  • the wire is tensile cut at the same longitudinal wire position by applying a tensile force (at least partially acting along the longitudinal direction of the wire) to the wire.
  • the wire is now cut off at the longitudinal wire position.
  • shear burrs can be avoided by placing the method on an appropriate longitudinal wire position
  • the proposed method can be complex
  • Process chain can be used.
  • the neighboring methods can e.g. Inserting the insulation into the stator groove, shaping in several steps by hairpins or
  • the process chain can, for example, strip with the following sequence - first forming step, second forming step and tensile separation - Formed into the hairpin shape. All steps can be carried out on a machine with different stations of a preferably longitudinally clocked system. Individual self-sufficient process units are also
  • Burrs (shear ridges) protruding from the side surfaces of the wire.
  • a certain burr formation can occur on the end faces of the wire due to the tensile separation, but this is due to the lack of lateral protrusion for the others
  • the wire can be a wire made of soft
  • the wire can be covered by an insulation, for example a layer of lacquer.
  • the wire can have a polygonal, in particular a square, cross section, for example a rectangular cross section
  • a rectangle being a rectangle with rounded corners and not necessarily a rectangle in the strictly geometric sense.
  • the method uses a wire with a cross section with two straight sides parallel to one another, or in particular with four straight sides, two of which are parallel to each other.
  • the forming sections of the forming units are in each case in particular along their movement axis between one
  • the forming sections form part of one
  • Forming tool which next to a forming section
  • the forming tool can be in one
  • Forming unit can be mounted and by the
  • Forming unit are driven, as later
  • the successive forming steps give the wire material the possibility of moving in the direction of the other
  • Process step "avoid" whereby a reduced formation of burrs or a reduced “throw formation can be achieved.
  • Coordination of the forming units can through electrically controlled “cams” (cams or
  • the forming sections of the first forming unit can lie in a (first) plane and can be moved in this plane and / or the forming sections of the second
  • Forming unit can lie in a (second) plane and be moved in this plane.
  • the arrangement of the opposing forming sections in one plane helps to ensure that the wire material is not sheared but deformed (forming sections are not as they are
  • Find application or are present in the device are preferably designed such that they are
  • shaping sections are arranged opposite one another in a plane can mean that the respective tool tips lie in a plane in which the respective axis of movement of the
  • Forming sections of the first forming unit can therefore lie in the first plane and the first axis of movement of the forming sections also lies in this plane. Accordingly, the tool tips of the forming sections of the second Forming unit are in the second plane and the second axis of movement of the forming sections is also in this second plane.
  • the first level and second level can be congruent.
  • the first level and second level can therefore lie on top of each other. In other words, they can
  • Forming sections of the second forming unit all lie in a common plane and are moved in this plane during forming.
  • the tool tips can all lie in a common plane and can be moved in this plane during forming. This ensures a particularly precise reshaping of the wire at exactly the same longitudinal wire position, since positioning errors are avoided.
  • the first movement axis can expediently
  • This can in particular be a polygonal or
  • the forming sections of the first forming unit and / or the forming sections of the second forming unit can each be in the opposite direction during the respective forming, in particular and with
  • a uniform shaping of the wire on the opposite wire sides can hereby be achieved, undesired deformations of the wire, for example bending or kinking, being avoided. This helps reduce scrap.
  • the shaping sections of the first shaping unit and / or the shaping sections of the second shaping unit can expediently be moved intermittently or continuously (towards one another) during the shaping of the wire. Depending on the properties of the
  • Wire material and / or configuration of the forming sections a desired deformation can be achieved.
  • Continuous movement of the forming sections enables a short forming time to be achieved.
  • With intermittent Movement can give the wire material time to look for the "right way” in forming.
  • the wire can be fed to the forming units from an input side and by means of a wire guide along a wire passage direction or
  • the wire Stabilization of the wire, so that it is held securely, especially during the forming steps and during train separation. After disconnection, the wire can be removed on the output side.
  • the wire for tension separation can be clamped in a gripper unit.
  • the gripper unit preferably the gripper unit and the forming units (unit formed from the gripper unit and forming units), can be moved relative to the wire.
  • a structurally simple train separation of the wire allows the wire to longitudinal position, since this merely a fixation of the wire in one place and a relative movement is required (velocity of the gripper unit v Gr is shame unit greater than the
  • Wire speed v wire For example. can the
  • Gripper unit are accelerated so that by
  • the gripper unit can be arranged downstream of the forming units in the wire passage direction.
  • the forming units cannot do any during the first forming step and / or during the second forming step along the longitudinal direction of the wire
  • the forming units can be moved synchronously with the wire or can be at a standstill together with the wire.
  • the first forming step and / or the second forming step can be carried out along the
  • Forming units are moved synchronously with the wire (no relative speed between forming units and wire). This enables fast forming and thus a short throughput time to be achieved.
  • the wire can be continuously, in particular at a constant rate, from one
  • Wire source are fed to the forming units.
  • the wire source can be a wire coil.
  • the wire can be moved as straight as possible in a section of its transport along a wire passage direction.
  • the forming units can be temporarily moved with the wire at the same speed. During this co-movement, the first and the second forming step can be carried out without this between the first
  • the one in the transport direction can be behind the forming units or behind the intended one
  • Section of the wire lying at the separating point can be accelerated, for example by means of the gripping device, as a result of which a
  • Tractive force can be applied to the wire and the wire at the wire longitudinal position with tapered
  • Wire cross section is cut.
  • the speed of the section of the wire lying in front of the forming units or in front of the intended separation point in the transport direction can preferably remain constant.
  • the forming units can be braked and moved back against the transport direction so that the process can be carried out again.
  • the movement speed of the forming units, the transport speed of the wire and the movement distance the forming units can be adjusted to the desired one
  • Wire length can be set.
  • the cut piece of wire can be removed from the gripping device and, for example, into one
  • the device for (in relation to the side surfaces) burr-free cutting of a wire with a polygonal, in particular a square (for example rectangular) cross-section is characterized by the features described below.
  • the device has a first forming unit for forming the wire with two each other in a first plane
  • the device further has a second forming unit for forming the wire with two opposite one another in a second plane and by a tool drive along a second movement axis
  • the forming sections of the first forming unit are always spaced apart from one another, so that by means of the
  • Forming sections of the already tapered wire cross section can be tapered from two further opposite sides to a further tapered shape.
  • the device also has a gripper unit, preferably arranged downstream of the forming units along the longitudinal direction of the wire
  • the wire can be clamped by means of the gripper unit, so that, for example
  • the device is set up in such a way that the two forming units successively move along the respective one
  • Forming sections of the first forming unit can be arranged in a (first) plane together with the first axis of movement and / or the forming sections of the second
  • Forming unit can be arranged in a (second) plane together with the second movement axis. This helps to ensure that the wire material is not sheared, but rather
  • Forming unit can therefore lie in the first plane and the first axis of movement of the forming sections also lies in this plane. Accordingly, the tool tips of the forming sections of the second forming unit can lie in the second plane and the second axis of movement of the forming sections also lies in this second plane.
  • first level and second level can advantageously be congruent to one another.
  • Forming unit all arranged in a common plane his. This ensures an exact reshaping of the wire at exactly the same longitudinal wire position, because
  • the first forming unit and the second forming unit can expediently be arranged in such a way that the first movement axis and the second movement axis
  • the first axis of movement and the second axis of movement can intersect. This allows a polygonal or square (e.g. rectangular) wire to be connected to each other
  • Forming units can be attached to a frame or a housing.
  • the forming units fastened in this way can form a forming unit.
  • first forming unit and / or the second forming unit can each have a threaded shaft coupled to the tool drive, which has two
  • a ball screw with favorable friction properties can be used as the threaded shaft.
  • the threaded shaft can be supported by means of pedestals and, for example, can be supported on a base plate of the forming unit.
  • the forming sections of a forming tool can, for example.
  • the tool holding plates can each be connected to a running body, on or in which a nut corresponding to the threaded shaft, for example one
  • the tool drive for example an electric motor, can preferably be coupled to the threaded shaft by means of a coupling.
  • the mounting plate can have holes for fastening
  • the forming units can be fastened to the mounting plate by means of a frame or by means of a housing.
  • the gripper unit can be attached to the mounting plate by means of a tool holder
  • the receiving plate can advantageously be guided displaceably along the longitudinal direction of the wire by means of a guide, wherein a motor drive can be coupled to the receiving plate, by means of which the receiving plate can be driven in the longitudinal direction of the wire.
  • Gripper unit can be moved with or relative to the wire. Forming can thus take place on the moving wire. Train separation can be achieved by moving the mounting plate or the gripper unit relative to the wire.
  • the guide can be rails and with the rails
  • the motor drive can have a drive motor, for example an electric motor.
  • Drive motor can with respect to feed, frequency, amplitude, acceleration, speed, position and / or
  • Torque can be controlled accordingly.
  • the shaping sections of the first shaping unit and / or the shaping sections of the second shaping unit can expediently have a greater width than those formed by these shaping sections
  • the forming sections can each have a tapering, for example tapering or tapering towards the free end chamfered, tool tip.
  • a tapering for example tapering or tapering towards the free end chamfered, tool tip.
  • the forming sections can be one
  • Forming unit in particular the first forming unit, have a tool tip with a first wedge angle and the forming sections of the other forming unit,
  • Corresponding forming sections are provided, the remaining material thickness of the wire being greater when forming with the first forming unit than when forming with the second forming unit.
  • the remaining material thickness in the respective direction of movement is greater in the first forming step than in the second
  • Forming step (remaining material thickness, for example, less than 0.2 mm).
  • the first forming unit can thus be used for forming with a lower penetration depth (penetration depth, for example, in each case approx. 0.5 mm). In this way, the wire can be tailored, for example, from its opposite narrow sides. Such reshaping can be referred to as "Corning".
  • the second forming unit can be used for forming with a greater depth of penetration (remaining ones Material thickness between the tool tips in the end position, e.g. approx. 0.2 mm). Although this forming does not separate, but only deforms the material, such a forming could be called “cutting" due to the greater depth of penetration of the forming sections.
  • the forming sections of the other forming unit, in particular the second one, can expediently
  • Forming unit have a tool tip, which has a continuous wedge angle. This allows such a forming section to be produced at low cost.
  • the forming sections of the other forming unit in particular the second forming unit, can have a tool tip which has a plurality of sections with different wedge angles, the
  • Wedge angle at the free end of the tool tip is smaller than a wedge angle adjoining the side facing away from the free end. Such a wedge angle at the free end facilitates penetration of the forming section into the wire, with the subsequent one
  • Forming section have a straight course. This ensures the stability of the forming tool and ensures a dimensionally correct opening (certain entry angle) when
  • Part of the present invention is also a piece of wire which has been severed from a wire, in particular by using a described method and / or using a described device.
  • a piece of wire comprises one by plastic forming
  • Fracture surface which has a surface structure caused by this separation process.
  • the tapered section has a first radially inward sloping surface and a second radially inward
  • the transition from the first sloping surface to the fractured surface is through a first
  • Transition edge is formed and the transition from the second sloping surface to the fracture surface is formed by a second transition edge.
  • the first transition edge and the second transition edge are rectilinear.
  • the first transition edge and the second transition edge are arranged orthogonally to one another.
  • the distance between the first two transition edges is greater than the distance between the second two
  • the piece of wire can be a rectangular original
  • the piece of wire can in particular comprise copper.
  • the tapered section has preferably been created in the first and second forming steps described above.
  • the first and second sloping surfaces extend from the original outside to the fractured surface.
  • first and / or the second sloping surfaces have areas with different slopes. It is therefore possible that the rate at which the surfaces drop radially inward, as viewed along the longitudinal direction of the wire, varies locally.
  • Part of the invention is also one of the just-d
  • Fig.l a device for burr-free separation of a
  • FIG. 2 shows a forming unit of the device from FIG. 1 in FIG
  • FIG. 4 shows a section of the wire from FIG. 3 after the first forming step and the second
  • FIG. 5 shows the forming sections of the second forming unit after a tapering of the wire cross section by immersion in the wire (end position) in a sectional view
  • Fig. 10 several hairpins.
  • FIG. 1 shows a device, designated overall by reference number 10, for burr-free cutting of a wire 12 with a square, in the present case rectangular,
  • the device 10 has a first forming unit 14 for forming the wire 12 from two opposite sides, a second forming unit 16 for forming the wire 12 from two further opposite sides and one
  • the first forming unit 14 and the second forming unit 16 are fastened to a frame 20, which is on a
  • Mounting plate 22 is mounted.
  • the gripper unit 18 is fastened on the receiving plate 22 by means of a tool holder 24.
  • the mounting plate 22 has a plurality of bores (without reference numerals) for fastening components.
  • the mounting plate 22 has cutouts 26 for gripping the mounting plate 22.
  • Gripper unit 18 on the receiving plate 22 forms the
  • Device 10 is a module-like unit 10 that can be handled as such and integrated, for example, in a longitudinally clocked system with upstream and / or downstream production stations.
  • the receiving plate 22 is guided so that it can be moved along the longitudinal direction X of the wire by means of a guide 28. With this, the receiving plate 22 and the components arranged thereon can be displaced with or relative to the wire 12 along the longitudinal direction X of the wire.
  • the mounting plate 22 or the module-like unit 10 has the reference symbol X '(movement axis C').
  • the guide 28 has rails 30 and carriages 32 corresponding to the rails 30, on which the mounting plate 22 is fastened.
  • a motor drive 34 is also coupled to the mounting plate 22, by means of which the mounting plate 22 can be driven along the wire longitudinal direction X or the movement axis X '.
  • the wire 12 is guided along the wire longitudinal direction X through the device 10 (from right to left in FIG. 1), the wire 12 being unwound as a continuous material from a wire roll 36 (roll axis 37) and the
  • Device 10 is fed to an input side 38. As already indicated, the device 10 is used for burr-free cutting of a wire 12 with a rectangular cross-section in the present case and uses the
  • Forming units 14, 16 and the gripper unit 18 as described below.
  • the first forming unit 14 is used to form the wire 12 with two mutually opposite forming sections 40, which can be moved towards one another at the same time by a tool drive 42 along a first movement axis Z (see FIGS. 2 and 3).
  • the wire cross section can be tapered from two opposite sides 44 (narrow sides 44) by means of the forming sections 40.
  • the second forming unit 16 is used to form the wire 12 with two mutually opposite forming sections 46, which can be moved towards one another along a second movement axis Y by a tool drive 48 (see FIGS. 2 and 3).
  • Forming sections 46, the wire cross section can be tapered from two further opposite sides 50 (broad sides 50).
  • the gripping unit 18 serves to pull-pull the wire 12 (see FIG. 1).
  • the wire 12 can be clamped in by means of the gripping unit 18.
  • Gripping unit 18 has two clamping jaws 52 which can be moved relative to one another and have wire clamping sections 54 attached to them.
  • the forming sections 40 of the first forming unit 14 and the forming sections 46 of the second forming unit 16 are all arranged in a common plane 56 (indicated in FIG. 3). In other words, they are due to the
  • Forming sections 40, 46 in one plane. Since the shaping sections 40 of the first shaping unit 14 and the shaping sections 46 of the second shaping unit 16 are not moved relative to the separation point 62 in the longitudinal direction X of the wire from the first shaping step to the second shaping step, the wire 12 is thus tapered exactly at the same longitudinal length position 62 (dividing point 62; see Fig. 4).
  • the plane 56 is orthogonal to
  • Longitudinal wire direction X is oriented and is in Figure 1
  • Forming sections 40, 46 each part of a
  • Forming tool 41, 47 each of which also has a shaft 49, 51, via which the forming tool 41, 47 can be attached.
  • Forming tool 41, 47 may also be bores, possibly with a thread (without reference numerals).
  • the first shaping unit 14 and the second shaping unit 16 are arranged such that the first movement axis Z and the second movement axis Y are orthogonal to one another
  • the forming units 14, 16 mounted orthogonally to one another on the frame 20 (see FIG. 1)
  • Figure 2 shows the first forming unit 14 with the
  • the first forming unit 14 has a threaded shaft 64 which is coupled to the tool drive 42 and is designed as a ball screw 64.
  • the threaded shaft 64 has two threaded sections 66, 68 with thread pitches of the same amount but oriented in opposite directions. In each case a forming section 40 or forming tool 41 is coupled to a threaded section 66, 68.
  • the threaded shaft 64 is fastened to a base plate 74 of the forming unit 14 by means of bearing blocks 70, 72.
  • Forming sections 40 are each fastened to a tool holding plate 78, 80 via the shaft 49.
  • Tool holding plates 78, 80 are each with a
  • Running body 82, 84 connected, in each of which one with the
  • Threaded shaft 64 corresponding nut 86, 88 is attached.
  • the nuts 86, 88 are designed as spindle nuts 86, 88.
  • the tool drive 42 for example in the form of an electric motor 42, is connected to the
  • Threaded shaft 46 coupled.
  • the second forming unit 16 is analogous to the first
  • Forming unit 14 is constructed, however, instead of
  • Forming sections 40 or the forming tools 41 die
  • the forming sections 40 of the first forming unit 14 can have a greater width than that
  • the forming sections 46 of the second forming unit 16 can have a larger width
  • FIG. 3 is schematic and shows the forming sections 40, 46 in their end position in the wire 12, the
  • Forming sections 40, 46 do not penetrate the wire 12 one after the other, but for forming reasons, especially since the forming sections 40, 46 would otherwise collide with one another, as described above.
  • the forming sections 40, 46 each have a tool tip 92, 94 that tapers towards the free end, for example, tapering or chamfering (see FIGS. 6 and 7).
  • the forming sections 40 of the first forming unit 14 have a tool tip 92 with a first wedge angle 96, and the forming sections 46 of the second forming unit 16 have a tool tip 94, the wedge angle 98 of which at the tool tip 94 is smaller than the first wedge angle 96.
  • the forming section 40 may have an end face 93 that is orthogonal to the tool axis 58.
  • the wedge angle 96 can be, for example, 30 °.
  • the first forming unit 14 can be used for forming the wire 12 with a smaller penetration depth
  • Narrow sides 44 are waisted. Such a reshaping can be referred to as "Corning”.
  • the second forming unit 16 can be used for forming with a higher one
  • Penetration depth (remaining material thickness between the tool tips 94 in the end position, for example approx. 0.2 mm).
  • the shaping sections 46 of the second shaping unit 16 can have a, in the case of embodiments which are not shown
  • Tool tip 94 have a continuous
  • Wedge angle 98 has (not shown).
  • the forming sections 46 of the second forming unit 16 can have a tool tip 94 which has several sections with different wedge angles.
  • the wedge angle 98 at the free end of the tool tip 94 can be smaller than a wedge angle 100 adjoining on the side facing away from the free end. Between the wedge angle 98 at the free end and the wedge angle 100, the forming section 46 can be one
  • the wedge angle 98 can be, for example, 15 °.
  • the wedge angle 100 can, for example, 30 ° be.
  • the forming section 46 can have an end face 103 that is orthogonal with respect to the tool axis 60.
  • the wire 12 is burr-free reshaped at a longitudinal wire position 62 (see FIG. 4)
  • the wire cross-section is tapered from two opposite sides 44 and a tapered wire cross-section remains.
  • the wire 12 is reshaped at the same longitudinal wire position 62 by simultaneous
  • the forming units 14, 16 lead during the first
  • Forming step and the second forming step along the longitudinal direction X of the wire no relative movement to the wire 12 by.
  • the relative speed between the forming units 14, 16 and the wire 12 is zero.
  • the first forming step and the second forming step take place on the wire 12 moved along the longitudinal direction X of the wire, the forming units 14, 16 during the
  • Forming steps are moved synchronously with the wire 12.
  • the wire 12 is then tension cut at the same longitudinal wire position 62 by applying at least a portion along the longitudinal wire direction X
  • the forming sections 40 of the first forming unit 14 and the forming sections 46 of the second forming unit 16 are all in one
  • the first movement axis Z and the second movement axis Y are oriented orthogonally to one another (see FIGS. 1 and 3).
  • the forming sections 40 of the first forming unit 14 and the forming sections 46 of the second forming unit 16 are always different from one another
  • the forming sections 40 of the first forming unit 14 and the forming sections 46 of the second forming unit 16 each have the same travel paths and are moved in opposite directions at the same speed.
  • Forming sections 40 of the first forming unit 14 and the forming sections 46 of the second forming unit 16 are each moved intermittently or continuously.
  • the wire 12 is the forming units 14, 16 from one
  • the Input side 38 fed and guided by means of a wire guide (not shown) along the longitudinal or X wire direction.
  • the wire 12 is guided through the gripping unit 18 on an output side 39 and, after being cut off, can be fed to a further processing.
  • the gripping unit 18 is the forming units 14, 16 in the wire longitudinal direction or wire passage direction X
  • the wire 12 is clamped in the gripping unit 18 and the gripping unit 18 is moved relative to the wire 12 by driving the receiving plate 22 together with the forming units 14, 16. Since the speed of the gripper unit 18 or the receiving plate 22 is greater than the speed of the wire 12
  • Manufacturing station e.g. the forming.
  • the device 10 designed as a unit 10 moves back in the direction of the wire reel 36 and synchronizes again to the feed speed of the wire 12 until the trailing wire is in the
  • Gripper unit 18 is located and is clamped there. This is followed by the first forming step and the second
  • the above-mentioned severed wire section forms a piece of wire 104 which was severed by the method according to the invention.
  • Pieces of wire 104 on both sides of a separation point 62, which was created by the method according to the invention, are shown in FIG.
  • FIG. 9 shows a single piece of wire 104 with a round cross section that was cut off by the method according to the invention.
  • the wire pieces 104 shown in FIGS. 8 and 9 each extend along a longitudinal direction L of the wire.
  • a radial wire direction R extends orthogonally to
  • Wire circumferential direction U a cylindrical related to the wire 12 or the respective wire pieces 104
  • the wire pieces 104 shown in FIG. 8 have a rectangular cross section. In other words, an original outer side 107 of the wire pieces 104 is rectangular when looking at a section orthogonal to the longitudinal direction L of the wire.
  • the wire pieces 104 each have a tapered one
  • outside 107 of the wire 12 or of the wire piece 104 is offset inwards in the radial wire direction R.
  • the tapered section 106 is present in the above
  • the respective tapered section 106 merges into a fracture surface 108.
  • the fracture surface 108 was created by means of the tensile separation described above.
  • the tapered section 106 Since the tapered section 106 has been created in the first and second forming steps described above, it knows a few first radially inward sloping surfaces 110 created by the first forming step and a few second radially inward sloping surfaces 112 created by the second forming step.
  • the first sloping surfaces 110 extend from the original outside 107 to the fractured surface 108.
  • the transition from the first falling surfaces 110 to the fractured surface 108 is formed by a pair of first transition edges 114, which in the present case run in a straight line.
  • sloping surfaces 112 also extend from the original outside 107 to the fractured surface 108. The transition of the second sloping surfaces 112 to
  • Fracture surface 108 is formed by a pair of second transition edges 116, which in the present case are also straight
  • transition edges 116 run orthogonally
  • Transition edges 114 and the second transition edges 116 is performed by those in the present example
  • Figure 10 shows two hairpins, each consisting of one
  • Wire piece 104 was made by forming, the Wire piece at its two ends has a separation point 62, which was illustrated in Figure 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Wire Processing (AREA)

Abstract

L'invention concerne un procédé de séparation sans bavure d'un fil, un dispositif (10) de séparation sans bavure d'un fil (12), un élément de fil et une épingle à cheveux. Selon le procédé, un fil est aminci par façonnage puis séparé par application d'une force de traction.
EP19736998.6A 2018-06-18 2019-06-18 Procédé et dispositif de séparation sans bavure d'un fil et élément de fil séparé correspondant Withdrawn EP3676031A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018114579.9A DE102018114579B3 (de) 2018-06-18 2018-06-18 Verfahren und Vorrichtung zum gratfreien Abtrennen eines Drahtes sowie ein entsprechend abgetrenntes Drahtstück und Hairpin
PCT/EP2019/066036 WO2019243342A1 (fr) 2018-06-18 2019-06-18 Procédé et dispositif de séparation sans bavure d'un fil et élément de fil séparé correspondant

Publications (1)

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US (1) US20210260644A1 (fr)
EP (1) EP3676031A1 (fr)
CN (1) CN112566735B (fr)
DE (1) DE102018114579B3 (fr)
WO (1) WO2019243342A1 (fr)

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DE102020200797A1 (de) 2020-01-23 2021-07-29 Wafios Aktiengesellschaft Verfahren und Vorrichtung zur Herstellung konfektionierter Formteile
DE102022132117A1 (de) 2022-12-03 2024-06-06 Ford Global Technologies Llc Verfahren zur wenigstens teilweisen herstellung einer Hairpin-Wicklungsanordnung
WO2025195282A1 (fr) * 2024-03-18 2025-09-25 Ruhlamat Huarui Automation Technology (Changzhou) Co., Ltd. Procédé de production de stators en épingle à cheveux pour moteurs électriques avec une séquence de découpe

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GB868053A (en) * 1956-08-01 1961-05-17 Theodor Calow A finishing machine for tubular or rod-shaped material
US3442167A (en) * 1966-05-13 1969-05-06 Atsushi Ohmasu Travelling shear

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CN112566735A (zh) 2021-03-26
WO2019243342A1 (fr) 2019-12-26
CN112566735B (zh) 2023-05-30
US20210260644A1 (en) 2021-08-26
DE102018114579B3 (de) 2019-10-10

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