Arrangement for a wire winding machine for producing a coil package as well as wire winding machine

Abstract

The invention relates to an arrangement (18) for a wire winding machine (10) for producing a coil stack (12), with at least one brake wheel (20) for generating a predetermined force on a wire (16) to be wound, wherein the wire (16) can be stored with at least one winding around the brake wheel (20), and wherein the arrangement (18) has at least one wire guide element (22) which guides the wire (16) on the brake wheel (20) to a predetermined position during the at least one winding. The invention further relates to a wire winding machine (10).

Description

[0001] The invention relates to an arrangement for a wire winding machine for producing a coil package, comprising at least one brake wheel for generating a predetermined force on a wire to be wound, wherein the wire can be supported with at least one winding around the brake wheel. Furthermore, the invention relates to a wire winding machine with an arrangement.

[0002] In a so-called wire winding machine, which can also be referred to as a needle winder, a wire for producing a coil package, for example for an electric motor, is guided from a wire storage via a brake wheel to a needle head, whereby corresponding movements are carried out via the needle head that enable the wire to be wound into the coil package. This requires that a constant tensile force is constantly applied to the wire so that coil winding can be carried out with a low error rate. In particular, the wire position on the brake wheel is crucial for constant wire tension. The constant wire tension is crucial for the winding result and thus the rework rate. The wire position depends in particular on the friction between the wire and the brake wheel and the desired wire tension.Since a different position on the brake wheel can lead to different diameters, the same braking torque results in a different tensile force in the wire. Therefore, a solution is needed to keep the wire position at the same position on the brake wheel even when the brake wheel wraps around several times. The brake wheel can be braked, for example, using a corresponding frictional connection or by an electric motor on the brake wheel, which applies a counter-torque to the brake wheel and thus enables constant wire tension.

[0003] DE 10 2005 028 053 ​​B3 relates to a method and a device for regulating the wire tension of a coil winding wire, in which a predetermined deceleration force is transmitted to the coil winding wire and the respective wire tension of the coil winding wire is recorded during the winding process. In order to achieve a nearly constant wire tension even with periodic speed changes of the coil winding wire during the winding process due to a non-rotationally symmetric cross-sectional shape of the part to be wound, the deceleration force is applied to the coil winding wire in a temporally superimposed manner based on the recorded measured values ​​of several previous windings.

[0004] WO 2007 030955 A1 discloses a winding machine for layered electrical coils, comprising a device that feeds a material to the coil to be wound in order to separate adjacent layers of the coil from one another. The device has a device for creating a predetermined breaking point in the material and a measuring unit. The measuring unit determines when the device for creating a predetermined breaking point is to be activated in order to create a predetermined breaking point in the material. The device also has a guide device that fixes the material near the predetermined breaking point on the coil to be wound at a predetermined time in order to separate the material at the predetermined breaking point. The winding machine thus predictively determines when a layer change is necessary in order to then create a predetermined breaking point in the material away from the coil.The predetermined breaking point is pulled all the way to the spool, allowing for controlled and secure material guidance. Only after the material is secured to the spool is the material torn off at the predetermined breaking point.

[0005] The object of the present invention is to provide an arrangement and a wire winding machine by means of which a coil package can be produced in an improved manner.

[0006] This object is achieved by an arrangement and a wire winding machine according to the independent patent claims. Advantageous embodiments are specified in the subclaims.

[0007] One aspect of the invention relates to an arrangement for a wire winding machine for producing a coil package, with at least one brake wheel for generating a predetermined force on a wire to be wound, wherein the wire can be supported with at least one winding around the brake wheel.

[0008] It is provided that the arrangement has at least one wire guide element which guides the wire on the brake wheel to a predetermined position during at least one winding.

[0009] In particular, a type of deflector is proposed that guides the wire as it rotates around the brake wheel. In particular, the guide can be designed such that the wire is displaced by one wire diameter during one revolution. The wire guide element thus serves as a stop for the wire, allowing it to be wound around the brake wheel in a substantially helical manner without overlapping.

[0010] It is therefore self-evident that the wire can also be wound multiple times around the brake wheel. However, it is crucial that the brake wheel, for example, is designed in such a way that the wire does not overlap during the wraps. By guiding the wire, this overlap can now be prevented, so that the wire can be reliably guided from the brake wheel to the needle head with a predetermined force. This allows for improved coil production. In particular, the coil can be produced with a lower error rate, since the wire tension can be kept constant by means of the invention.

[0011] According to an advantageous embodiment, the arrangement has at least two wire guide elements, in particular three wire guide elements, wherein the at least two wire guide elements are arranged at predetermined positions relative to the brake wheel. In particular, the wire guide elements can be arranged accordingly during one revolution around the brake wheel. For example, the wire guide elements can be formed at a 120-degree angle to one another. In particular, it is provided that, for example, the wire guide elements are each shifted by one-third of the diameter of the wire, so that after one revolution of the wire, the wire is shifted by one diameter. This enables reliable wire guidance on the brake wheel.

[0012] A further advantageous embodiment provides that the brake wheel has at least one conically shaped region. By means of the conically shaped region, it is possible for the wire to run automatically to a smaller diameter of the conically shaped region due to the downhill force. In particular, for example, the wire inlet point is on the conically shaped region. The conically shaped region can in turn be followed by a cylindrically shaped region, with the wire outlet point in turn being on the cylindrically shaped region. This has the advantage that reliable guidance can be provided in the conical region, thus preventing overlap. In the cylindrically shaped region, this has the advantage that the radius is known in a defined manner and thus the tensile force of the wire can be determined or adjusted in a defined manner.

[0013] Furthermore, it has proven advantageous if the at least one wire guide element is arranged in such a way that it guides the wire into the conically shaped area. In particular, it is thus provided that over the circumference of the brake wheel, in particular from the wire inlet point to the wire outlet point, the distance between the contact surface and the machine body is continuously increased by one wire thickness and the wire is pushed downwards on the cone in a defined manner by the contact surface, creating space for another wire. In this way, all other wires located on the brake wheel are also pushed downwards in a defined manner. The axial position of the wire guide element is selected in such a way that the outgoing wire comes to rest in the cylindrical part of the brake wheel. The wire tension is therefore constant.

[0014] Furthermore, it has proven advantageous if the brake wheel has at least one cylindrically shaped portion. In particular, the brake wheel is cylindrical in the area of ​​the wire exit point. In particular, the cylindrical portion has a constant radius. This allows for the determination and adjustment of a constant wire tension.

[0015] Furthermore, it has proven advantageous if the at least one wire guide element is designed to be immovable relative to the brake wheel. In particular, for example, the brake wheel can be designed to be movable so that a torque or braking moment is generated on the brake wheel. This can be done, for example, via frictional engagement or via an electric machine. However, the wire guide elements are arranged immovably so that when the brake wheel rotates, the wire guide elements serve as guides. In this case, it is provided in particular that, for example, the brake wheel and the wire guide elements or the wire guide element are designed on a common component, wherein the brake wheel is designed to be movable relative to the component and the wire guide elements are designed to be immovable relative to this component. The component thus serves as a holder for the wire guide element and for the brake wheel.This makes it possible to reliably adjust the tensile force on the wire.

[0016] It is further advantageous if the at least one wire guide element is arranged on the brake wheel at the wire's exit point. In particular, this allows the wire to exit at the exit point offset by, for example, the wire's diameter. This prevents overlap and, at the same time, reliably adjusts the wire tension.

[0017] Furthermore, it has proven advantageous if the at least one wire guide element is arranged axially offset by at least one wire thickness from a wire entry point on the brake wheel. This allows the wire to be reliably shifted by one wire thickness. This enables reliable wire pulling and simultaneously prevents the wire from overlapping on the brake wheel.

[0018] It is also advantageous if the at least one wire guide element has a wire guide element end that, viewed in cross-section, is substantially triangular. In particular, for example, the tip of the triangular shape is designed to substantially touch the wire. In particular, the contour of the deflector is adapted to the contour of the brake wheel in order to achieve the smallest possible gap between the brake wheel and the deflector, preventing the wire from becoming trapped between the wheel and the deflector. Thus, the wire can be reliably guided on the brake wheel with minimal friction.

[0019] A further aspect of the invention relates to a wire winding machine for producing a coil package with at least one arrangement according to the preceding aspect.

[0020] Advantageous embodiments of the arrangement are to be regarded as advantageous embodiments of the wire winding machine.

[0021] Further features of the invention emerge from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respective specified combination, but also in other combinations or on their own.

[0022] The invention will now be explained in more detail using a preferred embodiment and with reference to the drawings. They show: Fig. 1 is a schematic block diagram of an embodiment of a wire winding machine; Fig. 2 is a schematic plan view of an embodiment of an arrangement; and Fig. 3 a schematic sectional view of an embodiment of an arrangement.

[0023] In the figures, identical or functionally identical elements are provided with the same reference numerals.

[0024] Fig. 1 shows a schematic block diagram of a wire winding machine 10. The wire winding machine 10 is designed to produce a coil package 12. For this purpose, the wire winding machine 10 has, for example, a needle head 14. A wire 16 is wound around, for example, a laminated core of the coil package 12 via the needle head 14. The needle head 14 is in turn designed to perform corresponding winding movements. Based on these winding movements, a corresponding tension is created on the wire 16, which tension must in particular be kept constant. For this purpose, the wire winding machine 10 has an arrangement 18. The arrangement 18 in turn has at least one brake wheel 20 and a wire guide element 22. The wire 16 in turn can be provided from a wire reservoir 24. Furthermore, the Fig. 1 another pulley 26.

[0025] Fig. 2 shows a schematic side view of the arrangement 18. In the following exemplary embodiment, the wire 16 is wound once around the brake wheel 20. The movement of the wire 16 is illustrated in particular by corresponding arrows on the wire 16. For example, a rotation 40 of the brake wheel can be controlled or decelerated accordingly via the brake wheel 20. Furthermore, an inlet point 26 and an outlet point 28 are shown in particular. At the inlet point 26, the wire 16 runs onto the brake wheel 20, and at the outlet point 28, the wire 16 runs off the brake wheel 20, in particular in the direction of the needle head 14.

[0026] According to the invention, the arrangement 18 is provided in which a predetermined force is exerted on the wire 16 to be wound on the basis of the brake wheel 20, wherein the wire 16 can be supported with at least one winding around the brake wheel 20.

[0027] It is provided that the arrangement 18 has at least one wire guide element 22, in the present case in particular three wire guide elements 22, which guides the wire 16 on the brake wheel 20 to a predetermined position during at least one winding.

[0028] The Fig. 2 shows, in particular, the three wire guide elements. However, it is also possible for the arrangement 18 to have only one wire guide element 22 or even more than three wire guide elements 22. In the present exemplary embodiment, it is shown in particular that at least one wire guide element 22 is formed at the outlet point 28 and one wire guide element 22 is formed at the inlet point 26.

[0029] In particular, it is provided that the at least one wire guide element 22 is immovable relative to the brake wheel 20. In other words, the wire guide elements 22 or the wire guide element 22 does not follow the rotational movement of the brake wheel 20.

[0030] Fig. Figure 3 shows a schematic cross-section of an arrangement 18. In particular, it is shown below that the wire 16 is arranged with at least two windings on the brake wheel 20. In the present embodiment, the brake wheel 20 has, in particular, a conically shaped region 30 and a cylindrically shaped region 32. The at least one wire guide element 22 is arranged such that it guides the wire 16 in the conically shaped region 30.

[0031] Furthermore, the Fig. 3 a disk 34 rigidly attached to the brake wheel 20, which represents a lateral contact surface for the wire 16 over the entire circumference of the brake wheel 20 and thus limits the wire 16 on one side. If the distance between the contact surface on the wire guide element 22 and the machine base body is continuously increased by one wire thickness over the circumference, or from the inlet point 26 to the outlet point 28, the wire is pushed downwards on the cone in a defined manner by the contact surface, creating space for another wire. All other wires 16 located on the brake wheel 20 are thus also pushed downwards in a defined manner. The axial position of the wire guide element 22 is selected such that the outgoing wire 16 comes to rest in the cylindrical region 32 of the brake wheel 20. This allows the wire tension to be kept constant.

[0032] Furthermore, the Fig. 3, that the at least one wire guide element 22 has a wire guide element end 36 which, viewed in cross section, is substantially triangular in shape.

[0033] Overall, the Fig. 1 to 3 a deflector for the brake wheel 20 for the wire winding machine 10. List of reference symbols 10 Wire winding machine 12 coil pack 14 Needle head 16 wire 18 Arrangement 20 brake wheel 22 Wire guide element 24 wire reservoir 26 Entry point 28 Exit point 30 conical shaped area 32 cylindrical shaped area 34 disc 36 Wire guide element end 38 pulley 40 rotations QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2005 028 053 ​​B3

[0003] WO 2007 030955 A1

[0004]

Claims

[1] Arrangement (18) for a wire winding machine (10) for producing a coil package (12), with at least one brake wheel (20) for generating a predetermined force on a wire (16) to be wound, wherein the wire (16) can be supported with at least one winding around the brake wheel (20), characterized by that the arrangement (18) has at least one wire guide element (22) which guides the wire (16) on the brake wheel (20) to a predetermined position during the at least one winding. [2] Arrangement (18) according to claim 1, characterized by that the arrangement (18) has at least two wire guide elements (22), wherein the at least two wire guide elements (22) are arranged at predetermined positions relative to the brake wheel (20). [3] Arrangement (18) according to claim 1 or 2, characterized by that the brake wheel (20) has at least one conically shaped region (30). [4] Arrangement (18) according to claim 3, characterized bythat the at least one wire guide element (22) is arranged such that it guides the wire (16) in the conically shaped region (30). [5] Arrangement (18) according to one of the preceding claims, characterized by that the brake wheel (20) has at least one cylindrically shaped region (32). [6] Arrangement (18) according to one of the preceding claims, characterized by that the at least one wire guide element is designed to be immovable relative to the brake wheel. [7] Arrangement (18) according to one of the preceding claims, characterized by that the at least one wire guide element (22) is arranged at a run-out point (28) of the wire (16) on the brake wheel (20). [8] Arrangement (18) according to one of the preceding claims, characterized bythat the at least one wire guide element (22) is arranged, viewed axially, offset by at least one wire thickness of the wire (18) from an entry point (26) of the wire (16) on the brake wheel (20). [9] Arrangement (18) according to one of the preceding claims, characterized by that the at least one wire guide element (22) has a wire guide element end (36) which, viewed in cross section, is substantially triangular in shape. [10] Wire winding machine (10) for producing a coil package (12) with at least one arrangement (18) according to one of claims 1 to 9.

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