Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
  • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
  • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
  • H01F41/06—Coil winding
  • H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores

Definitions

• a winding unit for use in a winding machine for wind ⁇ ing elongate members or cores .
• the invention relates to a winding unit with a wire magazine for use in a windin.g machine, particular ⁇ ly for the winding of wire or insulating material on an elongate member or pipe or on a core.
• the winding unit may be used for the winding of toroidal cores, but could also be used for the winding of other cores.
• winding units with magazines which are mainly of the following kinds:
• a winding ' unit of the double rinq type such as known e.g. from British patent specification No. 660 218, consists of an advancing ring and a magazine ring. The two rings have nearly the same diameter and a common axis- of revolution.
• the disadvantage of this type is that the ring must first rotate a-number of revolutions for position ⁇ ing the winding material on the magazine whereafter the direction of rotation is reversed, and the winding may take place via the lateral slide in a manner analogous to the double ring type.
• toroidal cores whether they are open or endless, the winding plane will be displaced from the centre of the hole, where ⁇ by the wire consumption will increase.
• the minimum value of the hole of the toroidal core will be increased with the thickness of the lateral slide.
• the bandaging machine is used to cover a finished winding with a strip-shaped insulating foil.
• Such a machine may have a magazine comprising two identical rings between which cylindrical rollers are closely arranged.
• German published specification DE-OS No. 2 427 588 it has been attempted to use this principle for wire winding.
• the principle has two essential disadvantages.
• the residual hole in the toroidal core will be great, since the wire supply is carried by the extreme part of the rollers having a flange only.
• due to the fact that the individual cylinders with flanges are rolling during the winding operation a great friction will arise between the wire supply and the flange, and the wire will break if more than one wire layer is filled into the magazine.
• a winding unit with a wire magazine for use in a winding machine for the winding of wire or insulating material on elongate members or cores, particularly endless cores such as toroidal cores, said winding unit being provided with drive means and possibly braking means, and according to the invention this winding unit is characterized in that the cross-section of the supply chamber of the wire magazine has a height and ' a width substantially greater than the wire diameter, that the wire supply is stationary relative to the wire magazine during the winding operation, and that the wire magazine is constructed for being emptied from the bottom.
• winding of a core may start simultaneously with filling up the magazine, since the winding material, which is preferable lacquered copper wire, is carried directly down into the magazine and out through the bottom thereof in an arbitrary point and down to engage the member to be wound.
• the winding material which is preferable lacquered copper wire
• the wire magazine is emptied from the bottom opposite a stationary, arbitrary point below the bottom of the wire magazine on a wire advancing . member, which is separated from the wire magazine and arranged around a common axis of revolution there ⁇ with so that the wire magazine and the wire advancing member are freely rotatable relative to each other, but with the same preselected direction of revolution, a stationary well-defined point is obtained via which the wire may be taken out from the bottom of the magazine.
• the magazine will be suitable even for great wire diameters.
• the wire magazine By constructing the wire magazine to be emptied from the bottom through a flexible slot, the smallest possible ' residual hole in would toroidal cores will be obtained, since the winding unit when filled ' will not occupy substantially more space than the quantity of wire wound. Thereby a residual hole may be obtained, which is essentially smaller than what can be achieved in known winding machines.
• the wire magazine and the wire advancing member each consists of two substantially annular , members which are positioned concentrically around the common axis of revolution, a winding unit having small dimentions is obtained so that the residual hole in a toroidal core may be small.
• a small residual hole in a toroidal core may also be obtained in- another embodiment which is characterized in that the wire magazine has a greater diameter than the wire advancing member and surrounds the latter, that the wire magazine has a substantially 0- or U-shaped cross-section in which the wire is collected, that the wire magazine has a flexible central slot through which the wire may be pulled out and that the wire magazine and the wire advancing member are supported by individual sets of bearing means . According to.
• the wire magazine has a greater diameter than the wire advancing member and surrounds the latter, that the wire magazine has a substantially 0- or U-shaped cross-section in which the wire is collect ⁇ ed, and part of the bottom of the wire magazine is constituted by bearing means mounted on the wire advancing member, said bearing means reducing the the friction between the concentric annular members and simultaneously forming the stationary arbitrary point via which the magazine is emptied, a reduction of the friction is obtained allowing operation at greater winding speeds.
• both the wire magazine and the wire advancing member form an open ring, toroidal or other endless cores may be wound without any need to open the winding unit.
• a winding machine which is very reliable in operation and easily adjustable-, may be obtained by use of a winding unit in which the bearing means between the magazine and the wire advancing member comprises one ox more ball races or the bearing means comprises slide or ball bearings secured to the wire advancing member.
• the wire magazine is braked by a separate braking-device act ⁇ ing solely on the wire magazine whereby a constant wire tension during the winding operation may be ob ⁇ tained.
• this slot may be formed either in the bottom of the wire magazine by an elastic material or it may be formed by two annular parts, at least one of which is elastically secured to be concentric with its wire magazine ring.
• a mechanically very simple construction of the flexible slot may be obtained if the two symmetric rings of the wire magazine are suspended in elastic bearings to be pressed against each other by elastic forces.
• a possibility of very high winding speeds with thin wires may be obtained in a winding unit having a flexible slot if the latter is formed by an excess air pressure constituting an air cushion supporting a portion of the wire supply, which excess air pressure may be formed by jet-like means on the wire magazine during rotation thereof.
• Fig. 1 shows a winding unit . according to the invention having a flexible slot
• Fig. 2 is a sectional view of the winding unit shown in Fig. 1,
• Fig. 3 shows a winding unit according to the invention having open wire magazine and wire advancing member
• Fig. 4 is a sectional view of bearing means in the winding unit shown in Fig. 3
• Fig. 5 shows an embodiment having open rings
• Fig. 6 shows an embodiment having two sets of bearing means
• Fig. 7 shows in detail the embodiment shown in Fig. 6 with a flexible slot
• Fig. 8 shows an embodiment of the magazine construction shown in Figs. 6 and 7.
• a winding unit which comprises a wire magazine 42 supported by guide rollers 60 and caused to rotate by drive means 61 via a belt 51.
• the wire material 45 is carried from a wire supply 46 outside the winding unit through guide means 47 along with the belt 51 to the wire magazine 42 from which it is guided further on through the bottom of the wire magazine having a flexible slot as shown at 62 in Fig. 2 for engagement with the core 49 to be wound.
• the free end of the wire material 45 is held against the core 49, and " when the wire magazine 42 is caused to rotate, the wire 45 will be carried around the core 49.
• the latter and the winding unit must be displaced relative to each other during the winding operation. This may take place in a conventional manner by means of supporting members 50 for the core 49.
• the wire magazine comprises two symmetrical rings 42 which are secured relative to each other by means of guide rollers 40.
• the flexible slot 62 is formed between two rubber lips 63.
• the wire magazine 42 is divided into wD sectors having junctions 57 so that the endless ring of the magazine may be opened for the arrangement of endless toroidal cores.
• a winding unit comprising a wire advancing member 11 and a wire magazine 12, which may rotate freely relative to each other with the aid of bearing means 13.
• the rotation of the advancing member 11 is caused by special driving means 14 in the form of gears or friction wheels engaging the advancing member 11.
• the wire material 15 is carried from a supply 16 outside the winding unit through guide members 17 to the wire magazine 12 from which it is guided further on through the bottom of the wire magazine via a stationary point 18 on the advancing member 11 to the core 19 to be wound.
• the free end of the wire material is held against the core 19, and when the advancing member
• the advancing member is divided into two symmetrical arranged rings 22.
• the bearing means comprises two ball bearings 23 individually arranged in each of rings 22 and connected by a common shaft 24. keeping the two rings together.
• the wire magazine comprises two symmetric rings 25 arranged between the two rings 22 of the advancing member and position ⁇ ed relative thereto by means of a roller 26 on the shaft 24.
• the two rings 25 of the wire magazine may roll on the roller 26 whereby the wire magazine 12 may be caused to rotate -relative to the advancing member
• rollers 26 may constitute ;he stationary point 18 on the advancing member 11 ' via which the wire material 15 is drawn out from the bottom of the wire magazine 12. As shown in Figs. 3 and 4, the wire magazine
• the wire 15 may be taken out from the bottom of the supply via the roller 26 constituting the above mentioned stationary point 18.
• Fig. 5 an embodiment is shown in which the wire advancing member 11 and the wire magazine 12 are open rings which may be directly arranged around endless cores.
• Fig. 6 an embodiment is shown in which the wire magazine 12 encloses the wire advancing member
• wire magazine is supported by separate bearing means 30, which are carried by consols on the winding machine, and the advancing
• O PI member 11 is constituted by an interrupted ring in one piece which are positioned freely relative to the magazine.
• Fig. 7 shows in detail the bearing means 30 and 31, the wire magazine 12 having rubber lips 32 and the advancing member 11 of the embodiment shown in Fig. 6.
• FIG. 8 an alternative embodiment of the magazine shown in Figs. 6 and 7 is shown.
• the figure shows a practical embodiment of a magazine construction having a circular cross-section so that the.residual hole in a would toroidal core will have the same size as the cross-section of the magazine and the advancing ring together.
• a winding operation performed by a winding unit can be described to comprise the following steps: a) The wire is carried from the supply roll through the bottom of the magazine to engage the core and is held against the core. b) Rotation of the magazine is initiated. Each time a winding has been positioned on the core a corresponding length of wire has been drawn from the wire magazine through the bottom thereof whereby the point of drawing has been subjected to a displacement corresponding to one winding length or a corresponding displacement has occurred between the wire magazine and the guide ring. Simultaneously, the magazine has moved a length corresponding to its own circumference plus the length of a winding, and a corresponding wire length has been supplied to the magazine.
• the wire is cut when a sufficient supply for the actual operation has been filled into the magazine, and the winding operation continues with the same direc ⁇ tion of rotation until the magazine is emptied.
• the winding unit 'with a wire magazine according to the invention may be used for the winding of wire or
• it is suitable for the winding of cores for electrical coil and transformers such as endless toroidal cores.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Coil Winding Methods And Apparatuses (AREA)
• Storage Of Web-Like Or Filamentary Materials (AREA)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26065305

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (5)

Family Cites Families (2)

• 1979
  • 1979-03-13 GB GB7937916A patent/GB2048818B/en not_active Expired
  • 1979-03-13 JP JP50054879A patent/JPS55500129A/ja active Pending
  • 1979-03-13 DE DE792940987A patent/DE2940987A1/de not_active Withdrawn
  • 1979-03-13 WO PCT/DK1979/000008 patent/WO1979000763A1/en unknown
  • 1979-03-14 FI FI790859A patent/FI790859A/fi not_active Application Discontinuation
  • 1979-03-15 NL NL7902066A patent/NL7902066A/xx not_active Application Discontinuation
  • 1979-10-09 EP EP19790900315 patent/EP0011626A1/en not_active Withdrawn
• 1980
  • 1980-09-03 FR FR8019174A patent/FR2474468A1/fr active Granted

Non-Patent Citations (1)

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