DEVICE, IN PARTICULAR MACHINE, FOR PRODUCING A WIEGAND WIRE FROM A WIRE, IN PARTICULAR A PULSE WIRE, AND METHOD FOR OPERATING A DEVICE

Abstract

In a device, in particular machine, for producing Wiegand wire from a wire, in particular pulse wire, and a method for operating a device, the device having a first clamping chuck, a second clamping chuck, and a third clamping chuck, the wire being fed through each of the three clamping chucks, in particular so that the wire is able to be connected in a releasable and torsionally fixed manner to the three clamping chucks, in particular able to be connected to the three clamping chucks in a releasable, torsionally fixed and nonpositive manner. The clamping chucks are set apart from one another in the wire direction, and the second clamping chuck is situated between the first and the third clamping chuck in the wire direction. The second clamping chuck is rotatably mounted so that a torsion is able to be applied to a first wire section and the reverse torsion is able to be applied to a second wire section, the first wire section being situated between the first clamping chuck and the second clamping chuck, the second wire section being situated between the third clamping chuck and the second clamping chuck. The distance in the wire direction between the first and the second clamping chuck is controllable and/or regulatable with the aid of a first linear actuator, and the distance in the wire direction between the second and the third clamping chuck is controllable and/or regulatable with the aid of a second linear actuator.

Claims

1-15. (canceled)

16. A device for producing a Wiegand wire and/or a pulse wire from a wire, comprising: a first clamping chuck; a second clamping chuck; a third clamping chuck; a first linear actuator; and a third linear actuator; wherein the clamping chucks are adapted to feed the wire therethrough, the wire being releasably connectable in a torsionally fixed manner to the three clamping chucks and/or connectable to the three clamping chucks in a releasable, torsionally fixed and nonpositive manner; wherein the clamping chucks are set apart from one another in a wire direction, the second clamping chuck being located between the first clamping chuck and the third clamping chuck in the wire direction; wherein the second clamping chuck is rotatably mounted to apply a torsion to a first wire section and to apply a reverse torsion to a second wire section, the first wire section being located between the first clamping chuck and the second clamping chuck, the second wire section being located between the third clamping chuck and the second clamping chuck; wherein the first linear actuator is adapted to control and/or regulate a distance in the wire direction between the first clamping chuck and the second clamping chuck; and wherein the second linear actuator is adapted to control and/or regulate a distance in the wire direction between the second clamping chuck and the third clamping chuck.

17. The device according to claim 16, wherein the three clamping chucks are electrically insulated from the rest of the device; and wherein: (a) a voltage source is connected by a first pole to the first clamping chuck and by a second pole to the third clamping chuck, to apply a current to the first wire section and the second wire section; (b) a voltage source is connected by a first pole to the first clamping chuck and by a second pole to the second clamping chuck, to apply a current to the first wire section; and/or (c) a voltage source is connected by a first pole to the second clamping chuck and by a second pole to the third clamping chuck, to apply a current to the second wire section.

18. The device according to claim 16, wherein the first clamping chuck is accommodated in a first stretching unit, the second clamping chuck is accommodated in a second stretching unit, and the third camping chuck is accommodated in a rotatable manner in a torsion unit.

19. The device according to claim 18, wherein an electric motor and/or a belt drive driven by an electric motor is adapted to rotate the third clamping chuck.

20. The device according to claim 18, wherein the first linear actuator is adapted to linearly move the first stretching unit relative to the torsion unit, in and/or counter to the wire direction, and/or the second linear actuator is adapted to linearly move the second stretching unit relative to the torsion unit, in and/or counter to wire direction.

21. The device according to claim 18, wherein the first linear actuator includes a spindle drive driven by a first electric motor, the first electric motor being firmly connected to a base plate, a rotor shaft of the first electric motor connected in a torsionally fixed manner to a spindle operatively connected with a spindle nut firmly connected to the first stretching unit and/or to the first clamping chuck; and/or wherein the second linear actuator includes a spindle drive driven by a third electric motor, the third electric motor being firmly connected to the base plate, a rotor shaft of the third electric motor connected in a torsionally fixed manner to a further spindle operatively connect to a further spindle nut firmly connected to the second stretching unit and/or to the third clamping chuck.

22. The device according to claim 18, wherein the torsion unit and/or a second motor is firmly connected to base plate, the second motor being adapted to drive the belt drive that operates the second clamping chuck and/or rotate the second clamping chuck to generate torsion in a respective wire section to be processed.

23. The device according to claim 16, further comprising a sensor adapted to detect at least one magnetic variable.

24. The device according to claim 18, further comprising a sensor adapted to detect a tensile stress in a wire section to be processed, and being located in the first and/or second stretching unit.

25. The device according to claim 16, wherein the wire is made of a material that includes cobalt, iron, and vanadium.

26. The device according to claim 16, wherein the wire is made of a material that includes between 5% and 20% vanadium, between 40% and 65% cobalt, and between 35% and 60% iron.

27. A method for operating a device as recited in claim 16, comprising: feeding a section of the wire to be processed through the three clamping chucks; operating and/or closing the clamping chucks to hold the wire by the clamping chucks in a nonpositive manner; rotating the second clamping chuck in an axis of rotation coaxially aligned to the wire direction; varying and/or enlarging a distance between the first clamping chuck and the second clamping chuck and between the third clamping chuck and the second clamping chuck; applying a current to the wire between at least two of the clamping chucks; and opening the clamping chucks and advancing the wire advanced so that a newly to be processed section of the wire is fed through three clamping chucks.

28. The method according to claim 27, wherein the feeding, the operating and/or closing, the rotating, the varying and/or enlarging, the applying, and the opening are performed repeatedly.

29. The method according to claim 27, wherein the current is applied in the applying step between the first clamping chuck and the third clamping chuck, between the first clamping chuck and the second clamping chuck, and/or between the second clamping chuck and the third clamping chuck.

30. The method according to claim 27, further comprising demagnetizing the wire section guided out of the third clamping chuck.

31. The method according to claim 27, further comprising detecting a tensile force of the wire in the first wire section and/or the second wire section.

32. The method according to claim 31, wherein the tensile force is detected with the aid of a tensile force sensor.

33. The method according to claim 27, further comprising: determining at least one physical quality of the wire; and controlling the drives as a function of the physical quality to automatically obtain an optimal value of the physical quality.

34. The method according to claim 34, wherein the physical quality includes a value of an electrical and/or magnetic quality of the wire.

35. A Wiegand wire, wherein the Wiegand wire is produced using a device including: a first clamping chuck; a second clamping chuck; a third clamping chuck; a first linear actuator; and a third linear actuator; wherein the clamping chucks are adapted to feed the wire therethrough, the wire being releasably connectable in a torsionally fixed manner to the three clamping chucks and/or connectable to the three clamping chucks in a releasable, torsionally fixed and nonpositive manner; wherein the clamping chucks are set apart from one another in a wire direction, the second clamping chuck being located between the first clamping chuck and the third clamping chuck in the wire direction; wherein the second clamping chuck is rotatably mounted to apply a torsion to a first wire section and to apply a reverse torsion to a second wire section, the first wire section being located between the first clamping chuck and the second clamping chuck, the second wire section being located between the third clamping chuck and the second clamping chuck; wherein the first linear actuator is adapted to control and/or regulate a distance in the wire direction between the first clamping chuck and the second clamping chuck; and wherein the second linear actuator is adapted to control and/or regulate a distance in the wire direction between the second clamping chuck and the third clamping chuck; and/or wherein the Wiegand wire is produced using a method that includes: feeding a section of the wire to be processed through the three clamping chucks; operating and/or closing the clamping chucks to hold the wire by the clamping chucks in a nonpositive manner; rotating the second clamping chuck in an axis of rotation coaxially aligned to the wire direction; varying and/or enlarging a distance between the first clamping chuck and the second clamping chuck and between the third clamping chuck and the second clamping chuck; applying a current to the wire between at least two of the clamping chucks; and opening the clamping chucks and advancing the wire advanced so that a newly to be processed section of the wire is fed through three clamping chucks.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG. 1 is a perspective view of a system for producing Wiegand wire, i.e. pulse wire.

[0033] FIG. 2 is a side view of the system.

[0034] FIG. 3 illustrates a method of functioning of the system.

DETAILED DESCRIPTION

[0035] As schematically illustrated in FIGS. 1 to 3, the system has a first coil 1 on which the still unprocessed section of a wire 3 is wound as raw wire.

[0036] The section to be processed is passed through the system and the finished processed section of wire 3 is wound onto a second, rotatably mounted coil 2.

[0037] The section of wire 3 to be processed is connected in a nonpositive manner to a respective clamping chuck (6, 7, 8) at three locations which are set apart from one another in the wire direction. The clamping chucks (6, 7, 8) hold wire 3 at these locations, and clamping chuck 7, which is situated in the center in the wire direction, is rotated during the processing, the axis of rotation being aligned in parallel and/or coaxially with wire 3. This rotary motion carried out relative to the two other clamping chucks (6, 8) produces a first wire section 4, which is rotated in the opposite direction in comparison with a second wire section 5.

[0038] First wire section 3 lies between center clamping chuck 7 and first clamping chuck 6, which is situated closer to coil 1. Accordingly, the second wire section is situated between center clamping chuck 7 and third clamping chuck 8.

[0039] First clamping chuck 6 is movable relative to center clamping chuck 7, in particular along the wire direction. As a result, first wire section 4 is stretchable, i.e. variable in its length.

[0040] In the same manner, third clamping chuck 8 is movable relative to center clamping chuck 7, in particular along the wire direction. As a result, second wire section 5 is stretchable, i.e. variable in its length.

[0041] Center clamping chuck 7 is firmly connected to a base plate, i.e. the machine bed. Pivot bearings of coils 1 and 2 are also connected to this base plate as are linear actuators for the displacement of the first and third clamping chucks (6, 8).

[0042] Therefore, the production of the Wiegand wire is carried out by the following steps.

[0043] To begin with, the section of wire 3 to be processed is connected to clamping chucks 6, 7 and 8 in a nonpositive manner. Then, the rotation of center clamping chuck 7 in order to generate the torsion in the first and second wire sections (4, 5) is carried out and the first and third clamping chucks (6, 8) are moved away from center clamping chuck 7 for stretching purposes, i.e. an elongation.

[0044] For the linear movement of first clamping chuck 6, a first motor 9 is situated on base plate 21, which drives a spindle, in particular a ball bearing spindle, whose threaded region is in an operative connection with a spindle nut which is accommodated with first spindle chuck 6 in first stretching unit 13 and thus is firmly connected. With the aid of a rotary motion of first motor 9, first stretching unit 13 may thereby be moved back and forth parallel to the wire direction. In addition, a sensor 16 for detecting the tensile force or tensile stress of the section of wire 3 to be processed is situated on first stretching unit 13.

[0045] For the linear movement of second clamping chuck 6, a third motor 11 is situated on base plate 21, which drives another spindle, in particular also a ball bearing spindle, whose threaded region is in an operative connection with a spindle nut which is accommodated with third clamping chuck 8 in second stretching unit 14 and thus is firmly connected. With the aid of a rotary motion of third motor 11, second stretching unit 14 may thus be moved back and forth parallel to the wire direction.

[0046] First clamping chuck 6 may be operated manually.

[0047] Third clamping chuck 8 is able to be operated via a belt drive, which is drivable by a fourth motor 20. In a first direction of rotation of the rotor shaft of fourth motor 20, third clamping chuck 8 is opened, while it is closed in the opposite direction of rotation of the rotor shaft.

[0048] The second, i.e. center, clamping chuck 7, is also operated via a belt drive by a second motor 10. Motor 10 is not only used as a drive for opening or closing second clamping chuck 7, but also for generating the torsion.

[0049] Torsion unit 12 formed by second motor 10 and second clamping chuck 7 is electrically insulated from base plate 21 but firmly connected to it.

[0050] In an additional production step, a current is applied to the section of the wire to be processed so that a predefined temperature range is achieved. Toward this end, the three clamping chucks (6, 7, 8) as well as coils 1 and 2 are situated so as to be insulated from the base plate. It is therefore sufficient to apply a voltage between metallically arranged first and third clamping chucks 6 and 8 so that a current is flowing through the two wire sections (4, 5). Toward this end, wire 3 has a resistance such that the produced Ohmic heat makes it possible to achieve the intended temperature range of wire 3.

[0051] According to example embodiments, the voltage is applied between the first and second clamping chucks or between the second and third clamping chucks.

[0052] As illustrated in the Figures, after the mentioned production steps have been carried out, wire 3 is moved toward second coil 2 and wound onto it. A wire-advancement unit 15 is provided for this purpose, which drives coil 2 and thus causes the winding of the wire. The processed section is moved past a demagnetization unit 19 and past sensors 17 and 19.

[0053] With the aid of the machine, it is therefore possible to produce a wire 3 through torsion and elongation at a high temperature. In this manner, a Wiegand wire is produced from the raw wire, i.e. a pulse wire. The processed sections of wire 3 are wound up on second coil 2 and may be uncoiled and cut during subsequent use. Wire sections (4, 5) of 10 cm, for instance, are able to be produced without special effort.

[0054] As soon as the processed section has been wound, the clamping chucks (6, 7, 8) are tightened again and a section of wire 3 to be newly processed is thereby connected to the clamping chucks again (6, 7, 8) in a nonpositive manner. The production steps may then be repeated.

[0055] A quasi-continuous production is therefore possible in that a new section to be processed is continuously moved between first clamping chuck 6 and third clamping chuck 8 in a step-by-step manner, so to speak.

[0056] The quality is able to be checked while the produced Wiegand wire is passed along demagnetization unit 19 and then past sensor 18.

[0057] The wire is produced from a material that has, for example, a vanadium component of between 5% and 20%, a cobalt component of between 40% and 65%, and an iron component of between 35% and 60%.

[0058] The drives are controlled by a central control in that the latter predefines respective stretching and torsion characteristics. However, in particular the wire length of the produced wire is controllable as well, and the tensile stress, and thus also the wire elongation, are likewise controllable. In addition, the control may also predefine the time characteristic of the torsion, in particular the number of revolutions during the twisting, the direction of rotation and the angular speed when twisting the wire. In the same manner, the electrical voltage characteristics for energizing the wire are predefinable by the control. Even a fully automated achievement of an optimum of values of electrical and magnetic characteristics of the wire is possible in this manner. A wire breakage is also immediately detectable by sensor 16 for detecting the tensile force in the wire. In addition, sensor 16 may be used for monitoring the tensile force during the production process, which also means that the quality of the raw wire is able to be monitored and/or material faults may be detected.

[0059] According to example embodiments, first clamping chuck 6 may be manually operated.

LIST OF REFERENCE NUMERALS

[0060] 1 coil for raw wire

[0061] 2 coil for Wiegand wire

[0062] 3 wire

[0063] 4 first wire section

[0064] 5 second wire section

[0065] 6 first clamping chuck

[0066] 7 second clamping chuck

[0067] 8 third clamping chuck

[0068] 9 first motor

[0069] 10 second motor

[0070] 11 third motor

[0071] 12 torsion unit

[0072] 13 first stretching unit

[0073] 14 second stretching unit

[0074] 15 wire advancement unit

[0075] 16 tensile force sensor

[0076] 17 sensor

[0077] 18 sensor

[0078] 19 demagnetization unit

[0079] 20 fourth motor

[0080] 21 base plate, metallic