Guide jaw

Abstract

A guide jaw serves to guide a plurality of wires (100) on a former (16) in order to produce wave windings (104), wherein the guide jaw (12, 14) has a number of first guide slots (23) that are arranged parallel to one another. To improve the guidance and to potentially be able to make a shape correction, it is proposed for the guide jaw (12, 14), in the region of the guide slots (23), to have a guide element (24) that is movable with respect to a first part (28) and has a corresponding number of second guide slots (32), wherein the guide element (24) is movable relative to the first part (28) of the guide jaw, while the wires (100) are held in the first and / or second guide slots (23, 32), such that the length of the wire guidance is increased compared to the length of the first guide slots (23) or second guide slots (32) alone. The present application also relates to a winding device equipped with corresponding guide jaws, and to a method for carrying out the process with straightening of any deformations of central wire sections that are shortened in the current state.

Description

[0001] Guide jaw

[0002] According to the preamble of claim 1, the invention relates to a guide jaw for guiding a plurality of wires on a winding template for producing wave windings, wherein the guide jaw has a number of first guide grooves arranged parallel to one another. The present invention also relates to a winding device with such guide jaws and a method for correcting forming errors in the wave windings.

[0003] A winding device with guide jaws is described, for example, in DE 102015 120661 A1. With the process shown, it can happen that wires are not deposited in the geometrically desired position on the winding template due to frictional forces and tensile forces acting on the wires. This leads to asymmetry of the winding heads and shortened straight wire sections between the winding heads, which complicates further processing of the wires and can also lead to significant damage when pulling the winding into the stator slots. It is also already known to reshape the wave windings in the area of ​​the winding heads, but this is very inefficient as an additional work step outside of the actual process.

[0004] The guide grooves of the guide jaws cannot be extended indefinitely, since if the wires are already deformed in the area of ​​the straight sections before the first lowering, damage could already occur here.

[0005] The object of the present invention is to provide guide jaws that can better manage the problem of deformations between the winding heads and the straight wire sections.

[0006] According to the invention, the object is achieved by one of the types mentioned at the outset, in which the guide jaw has, in the region of the guide grooves, a guide element which is movable to a first part and has a corresponding number of second guide grooves, wherein the guide element is movable relative to the first part of the guide jaw, while the wires are held in the first and / or second guide grooves, so that the length of the wire guide is increased compared to the length of the first guide grooves or second guide grooves alone.

[0007] The solution according to the invention offers the advantage that the guide jaw with a shortened guide length can first be placed on the wires and then, by moving the second guide grooves in the direction of the winding heads, not only can the length of the guide be increased and thus its stability improved, but also the transition area between the straight sections and the winding heads can be actively reshaped without requiring a separate step separate from the actual process.

[0008] In a preferred embodiment of the invention, it is provided that the guide element with the second guide grooves precedes the first guide grooves and is movable perpendicular to the direction of extension of the wires relative to the first part of the guide jaw.

[0009] This design allows the second guide slots to be initially engaged in a more central area of ​​the wires, ensuring that the wires run straight there, preventing the edges of the slots from colliding with the wires, which generally have a rectangular cross-section, during engagement. The second guide slots then move toward the winding heads, allowing the first guide slots to engage in the more central area of ​​the wires.

[0010] The movement of the second guide element can be effected by active actuating elements, but it can also be achieved by corresponding guide elements between the guide element and the first part, which utilize the already provided feed movement of the guide jaw in the direction of the winding blade, which essentially serves as a stop. Thus, in a particularly preferred embodiment of the invention, a bevel is provided between the guide element and the first part of the guide jaw. When the guide jaw is lowered in the direction of the wires, this bevel guides the guide element in a direction toward the first part, which has a component parallel to the first guide grooves and a component perpendicular to the wires.

[0011] This results in the previously described movement sequence, in which the second guide grooves of the guide element initially grip the wires in a relatively far inner area and are then moved in the direction of the winding heads with further advancement of the first part of the guide jaw, while the first guide grooves move further forward and then also grip the wires, so that at the end of the sequence the first and second guide grooves are aligned one behind the other and offer a correspondingly greater guide length than conventional guide jaws.

[0012] In order to ensure a reverse movement sequence when lifting the guide jaw, it is preferably provided that the movement of the guide element when lowering the guide jaw takes place against the restoring force of at least one spring element.

[0013] In order to create space for tools in the middle, it can be advantageous for the first guide grooves to be divided into two groove parts with a central recess.

[0014] While it is generally sufficient to straighten and guide the wires using a movable guide element, designs are also conceivable in which guide elements are provided on both sides of the first guide grooves. Structurally, either a guide element is provided on one of the two groove sections or guide elements are provided on both groove sections.

[0015] As already mentioned, the guide jaw described above can be integrated into the movement sequence of a winding device known per se for winding flat wave windings with a wire feed for a plurality of wires, a sword-shaped winding template and guide jaws that can be lowered in the direction of the winding template for guiding the wires during the winding process, wherein the guide jaws of the type described above have, in the region of the guide grooves, a guide element that is movable to a first extent and has a corresponding number of second guide grooves, wherein the guide element is movable parallel to the wires, while the wires are held in the first and / or second guide grooves, so that the length of the wire guide is increased compared to the length of the first guide grooves.

[0016] The advantage of the guide jaws according to the invention is particularly evident in such a winding device because the already structurally enabled lowering process of the guide jaw is now also used to reshape the wires and to extend the length of the guide over the entire straight wire area between the winding heads.

[0017] A further advantage in the process is that the surface of the winding template can serve as a stop for the guide jaw, so that the desired movement sequence is possible without additional control elements.

[0018] This movement sequence is then implemented in the winding device in such a way that the guide element with its second guide grooves leads the first guide grooves and is movable perpendicular to the direction of extension of the wires relative to the first part of the guide jaw, wherein a bevel is provided between the guide element and the first part of the guide jaw, which, when the guide jaw is lowered onto the winding template, guides the guide element in a direction towards the first part which has a component parallel to the first guide grooves and a component perpendicular to the wires.

[0019] The present invention also relates to a method for correcting deformations in the region of straight wire sections of wires in flat wave windings during winding on a winding template with guide jaws which guide the wires in the desired positions, wherein a guide element which is movably arranged on the guide jaw and has second guide grooves is moved to first fixed guide grooves parallel to the wires, while the wires are held in the first and / or second guide grooves, in such a way that the length of the wire guide is increased compared to the length of the first guide grooves and the straight wire section is straightened over this length in the case of deformed wires.

[0020] As already mentioned, the advantage of this process lies in the fact that it can be integrated into existing processes without any loss of time and, moreover, also improves the process reliability of the known processes.

[0021] Further features, details, and advantages of the invention will become apparent from the wording of the claims and from the exemplary embodiment described below with reference to the drawings. They show:

[0022] Fig. 1 is a schematic representation of the problem of wire misalignments in known winding methods; Fig. 2 is a partial view of a winding device according to the invention;

[0023] Fig. 3 is a side view of the winding device according to Fig. 2.

[0024] Fig. 1 schematically illustrates the problem of shape deviations of the wound wires 100 of a wave winding 104 wound on a flat winding template 110 that occurs when winding wave windings on a flat template. Due to frictional forces and tensile forces acting on the wires during the movement of a wire feed 114 by the distance X, deformation occurs in the transition region between the winding heads 106 and the straight wire sections 108 lying therebetween. Depending on the direction of the force, an actual geometry IG can develop that deviates from a target geometry SG also shown in Fig. 1. When such a force is applied, a kink 112 of the wire 100 migrates by a distance Y towards the center of the template, so that the central, straight wire section 108 is shortened compared to the target geometry.This can lead to considerable problems in wire handling during the further process of manufacturing a stator and in particular when pulling the wave winding 104 into the slots of the stator, whereby in addition to the more difficult pulling in there is also a risk of damage to the wires.

[0025] Figs. 2 and 3 show parts of a winding device 10 with guide jaws 12, 14 on both sides of a flat winding template 16 having a central recess 18. The guide jaws are also not continuous over the entire length of the central straight wire sections 108 (not shown in Fig. 2), but rather each have two groove parts 20, 22 at the ends of the straight wire sections 108 to be guided, which form first guide grooves 23 for the wires of the wave winding. The guide jaws 12, 14 above and below the winding template 16 are otherwise identical, which is why their individual parts are also provided with identical reference numerals.

[0026] The guide jaws 12, 14 are each formed with a movable guide element 24 that is movably mounted on a first part 28 of the guide jaws along a guide slope 26. Compression springs 30 are provided to move the guide elements 24 toward their rest position protruding beyond the guide groove parts 20, 22. At their end facing the wave winding or the winding template 16, the guide elements 24 have second guide grooves 32 that lie in the same vertical plane as the first guide grooves 23. Fig. 2 shows an oblique view in which both guide jaws 12, 14 are in a rest position with the guide elements 24 extended. In Fig. 3, this state is shown for the winding template 12 above the winding template 16, while the guide jaw 14 is located below the winding template in a guide position with the guide element 24 compressed.In this position, the middle straight wire sections of the wave winding 104 are guided both by the first guide grooves 23 of the first parts 28 of the guide jaws 12, 14 and by the second guide grooves 32 which are then aligned with them.

[0027] With reference to Fig. 3, the interaction of the two-part guide jaws 12, 14 with the winding template and the intermediate wave winding 104 is explained below.

[0028] Above the winding template 16, the guide jaw 12 provided there is not yet in engagement with the wave winding 104. The retracted guide element 24 can be clearly seen with its second guide grooves projecting beyond the first guide grooves 23 in the direction of the winding template 16 in this position.

[0029] After the straight wire sections 108 have been deposited on the winding template 16, the guide jaw 12 is lowered and transferred to the state shown in Fig. 3 below the winding template 16. During the movement, the second guide grooves 32 initially engage between the middle wire sections 108. Until the point in time at which the guide element 24 reaches the winding template 16, which subsequently acts as a stop, the first part 28 of the guide jaw 12 and the guide element 24 move together without changing their relative position to one another.

[0030] After reaching the winding template 16, which acts as a stop, the guide bevel 26 causes the guide element 24 to move outwards. The second guide grooves 32 therefore move outwards in engagement with the wires, whereby the wire is reshaped if necessary and the actual geometry is converted into the desired geometry. The fact that the second guide grooves 32 initially engage further towards the center also prevents the edges of the guide grooves from colliding with wires that deviate from the ideal shape, because the engagement takes place in an area in which the wire lies reliably straight. During the further feed movement of the guide jaw 12 with the guide element 24 in vertical stop on the winding template, the guide element is therefore moved exclusively outwards towards the winding heads 106, while the first guide grooves 23 engage in the middle wire sections 108.The second guide grooves 32 are laterally offset from the first guide grooves 23 and, at the end of the feed process, are aligned with the first guide grooves 23 as an extension of the latter. In addition to the extended and thus improved guidance during subsequent handling of the winding mat, as mentioned above, subsequent corrections of the actual geometry toward the desired geometry are possible. The invention is not limited to one of the previously described embodiments, but can be modified in a variety of ways.

[0031] All features and advantages arising from the claims and the description, including design details, spatial arrangements and method steps, can be essential to the invention both individually and in a wide variety of combinations.

[0032] Reference symbol list

[0033] 10 Winding device

[0034] 12 Guide jaw

[0035] 14 Guide jaw

[0036] 16 Wrapping template

[0037] 18 Recess

[0038] 20 groove part

[0039] 22 Groove part

[0040] 23 first guide grooves

[0041] 24 Guide element

[0042] 26 guide bevel

[0043] 28 First part of the guide jaw

[0044] 30 compression springs

[0045] 32 second guide grooves

[0046] 100 wires

[0047] 104 wave winding

[0048] 106 winding heads

[0049] 108 straight wire sections

[0050] 110 Wrapping template

[0051] 112 kink

Claims

Patent claims 1. Guide jaw for guiding a plurality of wires (100) on a winding template (16) for producing wave windings (104), wherein the guide jaw (12, 14) has a number of first guide grooves (23) arranged parallel to one another, characterized in that the guide jaw (12, 14) has, in the region of the guide grooves (23), a guide element (24) which is movable relative to a first part (28) and has a corresponding number of second guide grooves (32), wherein the guide element (24) is movable relative to the first part (28) of the guide jaw, while the wires (100) are held in the first and / or second guide grooves (23, 32), so that the length of the wire guide is increased compared to the length of the first guide grooves (23) or second guide grooves (23) alone.

2. Guide jaw according to claim 1, characterized in that the guide element (24) with the second guide grooves (32) precedes the first guide grooves (23) and is partially movable perpendicular to the direction of extension of the wires relative to the first part of the guide jaw (12, 14).

3. Guide jaw according to claim 2, characterized in that between the guide element (24) and the first part (28) of the guide jaw (12, 14) a bevel (26) is provided, which when the guide jaw (12, 14) is lowered in the direction of the wires (100) guides the guide element in a direction relative to the first part, which has a component parallel to the first guide grooves (23) and a component perpendicular to the wires (100).

4. Guide jaw according to claim 3, characterized in that the movement of the guide element (24) when lowering the guide jaw (12, 14) takes place against the restoring force of at least one spring element (30).

5. Guide jaw according to one of the preceding claims, characterized in that the first guide grooves (23) are each divided into two groove parts (20, 22) with a central recess. Guide jaw according to claim 5, characterized in that a guide element (24) is provided on one of the two groove parts (20) or guide elements are provided on both groove parts.A winding device for winding flat wave windings (104) with a wire feed for a plurality of wires (100), a sword-shaped winding template (16), and guide jaws (12, 14) that can be lowered in the direction of the winding template (16) for guiding the wires (100) during the winding process, characterized in that the guide jaws (12, 14) according to one of claims 1 to 6 have, in the region of the guide grooves (23), a guide element (24) that is movable to a first part (28) and has a corresponding number of second guide grooves (32), wherein the guide element (24) is movable at least partially parallel to the wires (100), while the wires (100) are held in the first and / or second guide grooves (23, 32), so that the length of the wire guide is increased compared to the length of the first or second guide grooves (23, 32) alone.Winding device according to claim 7, characterized in that the surface of the winding template (16) serves as a stop for the guide jaw (12, 14). Winding device according to claim 7 or 8, characterized in that the guide element (24) with its second guide grooves (32) precedes the first guide grooves (23) and is movable relative to the first part (28) of the guide jaw (12, 14) with a directional component perpendicular to the direction of extension of the wires (100), wherein a bevel (26) is provided between the guide element (24) and the first part (28) of the guide jaw (12, 14), which, when the guide jaw (12, 14) is lowered onto the winding template (16), guides the guide element (24) in a direction toward the first part (28), which has a component parallel to the first guide grooves (23) and a component perpendicular to the wires (100).Method for correcting deformations in the region of straight wire sections (108) of wires (100) in flat wave windings (104) during winding on a winding template (16) with guide jaws (12, 14) which guide the wires (100) in the desired positions, characterized in that a guide element (24) which is movably arranged on the guide jaw (12, 14) and has second guide grooves to first fixed guide grooves is moved parallel to the wires (100) in such a way that. while the wires (100) are held in the first and / or second guide grooves (23, 32), the length of the wire guide is increased compared to the length of the first or second guide grooves (23, 32) alone and the straight wire section (108) is straightened over this length in the case of previously deformed wires (100).

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