EP2866234A1 - Bobine de démagnétisation - Google Patents
Bobine de démagnétisation Download PDFInfo
- Publication number
- EP2866234A1 EP2866234A1 EP20140182202 EP14182202A EP2866234A1 EP 2866234 A1 EP2866234 A1 EP 2866234A1 EP 20140182202 EP20140182202 EP 20140182202 EP 14182202 A EP14182202 A EP 14182202A EP 2866234 A1 EP2866234 A1 EP 2866234A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- metal profile
- profile parts
- parts
- carrier body
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 81
- 239000002184 metal Substances 0.000 claims abstract description 81
- 238000004804 winding Methods 0.000 claims abstract description 46
- 239000004020 conductor Substances 0.000 claims abstract description 16
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 31
- 239000010959 steel Substances 0.000 claims description 31
- 230000005347 demagnetization Effects 0.000 claims description 23
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 208000004221 Multiple Trauma Diseases 0.000 claims 1
- 239000000463 material Substances 0.000 description 9
- 230000005291 magnetic effect Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010292 electrical insulation Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/02—Coils wound on non-magnetic supports, e.g. formers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
Definitions
- the invention relates to a degaussing coil for demagnetizing ferromagnetic parts, comprising a coil carrier body, which has a tubular central portion with flanges adjacent thereto on both sides, preferably lying in parallel planes, with an insulated electrical conductor carried by the coil carrier body and wound several times around its central axis forms a coil winding, and with a multi-part, lid-like coil winding cover which extends over the coil winding between the flanges.
- Demagnetization of ferromagnetic parts is often required in the industry to facilitate handling or coating of the parts.
- demagnetization prevents magnetically attractable contaminants from being absorbed by the parts.
- the cause of the magnetization of, for example, workpieces are very diverse.
- Demagnetization also called demagnetization
- demagnetization is a process by which a ferromagnetic material that has become permanent magnetic loses all or part of its magnetic polarization. Such materials are usually demagnetized by a first strong alternating magnetic field, which then gradually subsides.
- Demagnetization coils also called demagnetization tunnels, which generate an alternating magnetic field in the direction of their transmission axis, are frequently used in industry for the magnetic demagnetization of ferromagnetic parts.
- the demagnetizing coils are operated with an alternating current of typically about 50 Hz or less, wherein the parts to be demagnetized are slowly passed through the demagnetization coil at a uniform speed.
- Known demagnetization coils with the exception of small coils, have a coil carrier body of robust cast aluminum, which carries the coil winding.
- This is composed for example of different sized aluminum castings.
- the aluminum castings are part of a modular system and can be flexibly combined into coils of different sizes.
- the coil carrier body in this case comprises a tubular circular or angularly formed central portion with integrally formed flanges adjoining on both sides, which extend orthogonally to the central portion around which the insulated conductor forming the coil winding is wound several times.
- the coil winding is externally protected by a multi-part cover-like coil winding cover, which is screwed to the flanges, the coil winding completely covering.
- the coil support body made of cast aluminum is complex to produce and therefore expensive.
- the central portion and the flanges also different molds are required, which are only expensive to produce and require a long production time.
- This is disadvantageous especially for customer-specific custom-made demagnetization coils, since an adaptation to the respective size and / or shape of the ferromagnetic parts to be demagnetized is usually necessary.
- the invention has for its object to propose a way that allows a fast, flexible and cost-effective production of generic Demagnetrete devissspulen.
- the Entmagnetleitersspule according to the invention has a coil support body, which is composed of at least two metal profile parts with a U-shaped cross-sectional shape.
- the metal profile parts are mechanically connected to each other at the end in a ring-shaped manner, their bases forming the middle section and their legs forming the flanges of the coil carrier body.
- U-shaped connecting profiles are arranged between the end faces of the metal profile parts, wherein the metal profile parts are electrically insulated from each other at least at a connecting profile.
- the U-shaped cross-sectional shape includes metal profile members where the spacing of the legs from the base of the steel profile member is constant or increases with increasing distance from the base.
- the U-shaped connection profiles are adapted to the respective cross-sectional shape of the metal profile parts to be joined.
- the metal profile parts are simple and inexpensive to produce, for example, from correspondingly shaped steel profiles or aluminum profiles of any length by separation, so that demagnetization coils of any size can be manufactured with little effort and thus with low production costs.
- the U-shaped connection profiles are universally applicable, ie, regardless of the size of the demagnetization coil to be produced unchanged.
- various metal profiles are required for different cross-sectional shapes of the metal profile parts, in which the central portion forming bases and / or the flanges forming legs of the metal profile parts for different lengths and winding numbers of the coil winding must be designed differently. All provided for the production of the metal profile parts metal profiles are preferably formed without elevations and / or openings.
- the metal profile parts are thus inexpensive to produce, very easy to edit and can stocked due to the low unit cost and the universal use of metal profiles storage. Thus, special customer requirements in terms of the shape and size of the degaussing coil can be quickly implemented.
- the metal profile parts are made of non-ferromagnetic steel material or aluminum material, preferably ferromagnetic stainless steel material, wherein the non-ferromagnetic steel material due to the lower eddy currents in the magnetic field of the coil winding heats up much less than aluminum or normal ferromagnetic steel.
- the metal profile parts are positively or non-positively connected with each other and / or with the connection profiles in the assembled state. Preferably, these are bolted together or riveted.
- connecting profiles may in principle consist of any material, but not ferromagnetic material has proven to be particularly advantageous in terms of self-heating. They are adapted to the cross-sectional shape of the metal profile parts and in engagement with these or in engagement. Since only metal profile parts with identical U-shaped cross-sectional shape are used for a degaussing coil, only connecting profiles are used, which are of identical design.
- the metal profile parts connected there are electrically insulated from one another by suitable measures in order to prevent ring currents in the coil carrier body. This can be achieved for example by insulating discs, sleeves, screws or rivets at the joints.
- connection profiles are formed in several pieces and have a central part and two identically formed side parts, which can be coupled together. This facilitates the production of the U-shaped connecting profiles and also their installation between the end faces of the U-shaped metal profile parts essential.
- the coil winding cover on the metal profile parts associated Spulenabdeckbleche is preferably flat, preferably arranged without or with a small distance to the coil winding and each connected to the legs of the metal profile parts, which form the flanges. In practice, a greater distance may be present because the coil carrier body is usually only as fully wound as it dictates the field strength required for demagnetizing the parts to be demagnetized.
- the Spulenabdeckbleche are screwed, riveted, glued or otherwise attached to the coil support body, for example.
- the tubular middle section of the coil carrier body can have any desired cross-sectional shape adapted to the parts to be demagnetized.
- a cross-sectional shape is used in which the bases and the legs of the metal profile parts are planar and have rectilinearly extending edges, so that longitudinally non-curved metal profile parts can be used, for example, steel profile bars or aluminum profile bars with a corresponding U-shaped cross-sectional shape can be produced quickly and easily in all desired lengths.
- the central portion of the coil support body is formed with a rectangular cross-sectional shape, which also includes square shape, so that the end faces of the legs of the metal profile parts extend at a 45 ° angle relative to the flat sides of the bases of the metal profile parts.
- the coil carrier body may also have instead of four corners and three, five or more corners, with only a straight number of corners seems reasonable.
- the angle of the end faces of the legs of the metal profile parts relative to the flat sides of the bases of the metal profile parts can be derived from the number of corners of the coil carrier body. In general, however, not all corners of the bobbin have an identical angle between the flat sides of the bases of the metal profile parts, but meaningfully opposite each other arranged corners.
- the legs of the metal profile parts have integrally formed connecting webs which protrude laterally outwards from the legs and have through holes for a screw connection to one another and to the coil cover plates.
- the fastening of the U-shaped connection profiles on the end faces of the metal profile parts preferably takes place by clamping the middle part of the connection profiles and by screwing the two identically formed side parts of the connection profiles with the metal profile parts, wherein the screw preferably passes through the side parts.
- the metal profile parts are bent sheet steel blanks, preferably made of stainless steel, or beveled aluminum sheet blanks. These can be cut from flat steel sheets or aluminum sheets with all conventional techniques in a flat form, provided with the necessary through holes and then bent accordingly to produce the desired cross-sectional shape.
- the metal profile parts required for the production of a demagnetization coil can be obtained at any time directly from available steel sheets or aluminum sheets in the respective length and shape order related can be easily and quickly produced.
- the middle part of the connecting profiles on a connecting the bases of the metal profile parts rounded contact surface for the coil winding.
- This improves the electrical insulation between the insulated electrical conductor of the coil winding and the end faces of the metal profile parts, which form the coil carrier body.
- the train of the electrical conductor during the winding process is highest at the joints between the metal profile parts, so that here the insulation must be the best.
- the rounding of the connection profile at this point reliably prevents the connection profile from digging into, weakening or damaging the insulation of the electrical conductor forming the coil winding.
- it is achieved that the coil winding in the region of the connection profiles does not undergo too sharp bending, in particular that the electrical conductor is not bent, so that cracking is reliably prevented.
- connection profiles are plastic parts which preferably have apertures for the screw connection assigned to the passage holes of the connecting webs.
- connection profiles not only visually close the gap between the end faces of the metal profile parts, but simplify the local electrical insulation between them significantly.
- the degaussing coil according to the invention preferably has metal bushes in the openings of the connection profiles and / or in the case of electrically insulated metal profile parts plastic bushings on the through holes of the connecting webs of the metal profile parts. In this way, too strong pressure influencing of the connection profiles is reliably prevented or an electrical insulation between the abutting metal profile parts is achieved.
- the demagnetization coil according to the invention for the demagnetization of ferromagnetic parts has an electrical connection device for the coil winding and a power supply cable. This is preferably arranged on one of the Spulenabdeckbleche near one of the connecting profiles and overlaps the corresponding connection profile at least partially.
- the electrically insulated conductor forming the coil winding can be led out particularly easily at the end faces of the metal profile parts and introduced into the electrical connection device.
- An adaptation of the metal profile parts at the corresponding joint is not required.
- at least the connection profile assigned to the connection device in one embodiment of the invention has a passage for the insulated conductor of the coil winding.
- the metal profile parts and the Spulenabdeckbleche the coil carrier body are connected to each other only at the electrical connection device associated with the connection profile electrically non-conductive.
- the electrical connection device associated with the connection profile electrically non-conductive.
- the electrically conductive connection is achieved at the respective points by inserted into the plastic connecting profiles metal bushings in conjunction with metal screws.
- the electrical insulation of the metal profile parts in the region of the connection device is achieved by plastic bushes with integrally formed collars inserted into the through-holes of the metal profile parts, which isolate the penetrating metal screws electrically from the connecting webs of the metal profile parts.
- connection profile assigned to the connection device has an additional closure profile on the outside. This is arranged opposite the middle part of the corresponding connection profile and preferably has the passage for the conductor of the coil winding in the electrical connection device coil winding on.
- closure profile of the connection profile overlapped by the connection device is preferably integrally formed on the connection device, which is made of plastic material, and extends to a shortened coil cover plate, which is shorter than the other coil cover plates not overlapped by the connection device.
- the Entmagnetleitersspule can be completely mounted except for the connection device, wherein the ends of the coil winding are led out between the end faces of the corresponding metal profile parts. After insertion of the conductor ends in the electrical connection device, this can be used with the end profile in the associated connection profile and preferably attached to the shortened Spulenabdeckblech.
- the FIG. 1 shows an embodiment of the degaussing coil according to the invention in a perspective view and the FIG. 2 the corresponding embodiment with a view of the front side of the degaussing coil.
- the demagnetization coil 1 for the demagnetization of ferromagnetic parts has a coil carrier body 2, which comprises a tubular central portion 3 with flanges 4 adjoining it on both sides, preferably in parallel planes.
- the coil carrier body 2 carries a multi-wound around the central portion 3 insulated electrical conductor which forms a coil winding 25.
- the coil winding 25 is in the FIGS. 1 . 2 not shown and only in the FIG. 5 visible, noticeable.
- the ends of this electrical conductor of the coil winding 25 are led into an electrical connection device 5, which is provided for connection of a power supply cable.
- the coil carrier body 2 is closed to the outside via a multi-part lid-like coil winding cover 6 which extends over the coil winding 25, not shown, between the flanges 4 of the coil carrier body 2.
- the multi-part coil winding cover 6 comprises four Spulenabdeckbleche 7, 7 ', which are arranged on the coil carrier body 2 top, bottom, right and left and are screwed several times with the two flanges 4.
- the tubular central portion 3 of the coil carrier body 2 has a square cross-sectional shape.
- the coil carrier body 2 is in the illustrated embodiment of four identically shaped metal profile parts 8 made of non-ferromagnetic steel with in Essentially composed of U-shaped cross-sectional shape, one of which in the FIG. 3 is shown in perspective view.
- the four steel profile parts 8 are mechanically connected to each other at the end in a ring-shaped manner, the bases 9 of which form the middle section 3 and the legs 10 of which form the flanges 4 of the coil carrier body 2.
- 8 U-shaped connecting profiles 12 are arranged between the end faces 11 of the steel profile parts, which are preferably made of a plastic material.
- the steel profile parts 8 are produced as folded steel sheet blanks and have on their legs 10 integrally formed connecting webs 13, 13 'which project laterally outwardly from the legs 10 and through holes 14 for screwing each other and with the Spulenabdeckblechen 7, 7' have.
- the legs 10 of the steel profile parts 8 are orthogonal to the base 9 of the steel profile parts 8. At the end faces 11 of the steel profile parts 8, the legs 10 and the connecting webs 13 'at an angle of 45 ° inclined relative to the base 9.
- On the longitudinal sides 15 of Steel profile parts 8 extend the connecting webs 13 to the opposite parallel to the base 9 along the legs 10th
- the U-shaped connection profiles 12 between the end faces 11 of the steel profile parts 8 are preferably made of plastic material and like the FIGS. 4a-4c show, formed in several pieces. They comprise two identically designed side parts 16 and a middle part 17, which can be coupled together, wherein the side parts 16, as in the Figure 4c can be seen, the through holes 14 of the steel profile parts 8 associated openings 18 for the screw 24 have.
- the middle part 17 has, like the FIG. 4b can be removed, recesses 19 for the frontal recording of the bases 9 of the steel profile parts 8. It is similar to an angle bar formed with a rounded contact surface 20 which connects the bases 9 of the adjacent steel profile parts 8 together.
- the side parts 16 of the connection profiles 12 are designed as flat strips.
- the steel profile parts 8 of the demagnetization coil 1 according to the invention are connected to each other at least at one of the connection profiles 8 against each other electrically isolated.
- the electrically insulated connection is arranged directly on the connection device 5 in the illustrated embodiment.
- the Spulenabdeckbleche 7, 7 ' are electrically non-electrically connected to each other at this point.
- the overlapped by the connecting device 5 Spulenabdeckblech 7 ' is shorter than the other three Spulenabdeckbleche 7.
- a closure profile 21 is formed, which the gap between the Spulenabdeckblechen 7, 7 'closes and engages in the connection profile 12.
- the closure profile 21 extends from the side parts 16 of the connection profile 12 up to the shortened coil cover plate 7 '.
- FIGS. 6 and 6a show the junctions of the steel profile parts 8 with the connection profiles 12 in an enlarged view, wherein the FIG. 6a the electrically insulated connection point in the region of the connection device 5 and the FIG. 6b one of the other joints illustrates.
- metal bushings 22 are arranged in the openings 18 of the side parts 16 of the connection profiles 12, where the connecting webs 13 'when screwing the steel profile parts 8 can support each other and in the electrically insulated steel profile parts 8 plastic bushings 23 to the Through holes 14 of the connecting webs 13 of the steel profile parts 8 are arranged, which prevent the respective screw 24 contact the connecting webs 13 'of the legs 10 of the steel profile parts 8.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
- Coils Or Transformers For Communication (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201320104681 DE202013104681U1 (de) | 2013-10-16 | 2013-10-16 | Entmagnetisierungsspule |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2866234A1 true EP2866234A1 (fr) | 2015-04-29 |
EP2866234B1 EP2866234B1 (fr) | 2016-03-02 |
Family
ID=49781867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14182202.3A Active EP2866234B1 (fr) | 2013-10-16 | 2014-08-26 | Bobine de démagnétisation |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2866234B1 (fr) |
DE (1) | DE202013104681U1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3241408A1 (de) * | 1982-11-09 | 1984-05-10 | Norbert 5275 Bergneustadt Weiner | Spulenkoerper |
WO1992009092A1 (fr) * | 1990-11-14 | 1992-05-29 | Zumtobel Aktiengesellschaft | Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite |
US20100302701A1 (en) * | 2009-06-01 | 2010-12-02 | Olliges William E | Capacitor based bi-directional degaussing device with chamber |
-
2013
- 2013-10-16 DE DE201320104681 patent/DE202013104681U1/de not_active Expired - Lifetime
-
2014
- 2014-08-26 EP EP14182202.3A patent/EP2866234B1/fr active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3241408A1 (de) * | 1982-11-09 | 1984-05-10 | Norbert 5275 Bergneustadt Weiner | Spulenkoerper |
WO1992009092A1 (fr) * | 1990-11-14 | 1992-05-29 | Zumtobel Aktiengesellschaft | Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite |
US20100302701A1 (en) * | 2009-06-01 | 2010-12-02 | Olliges William E | Capacitor based bi-directional degaussing device with chamber |
Also Published As
Publication number | Publication date |
---|---|
EP2866234B1 (fr) | 2016-03-02 |
DE202013104681U1 (de) | 2013-11-27 |
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