DE711770C - Process for applying band-shaped core material to finished coils or windings of transformers, chokes or the like. - Google Patents

Description

Method for applying tape-shaped core material to finished wound Coils or windings of transformers, chokes or the like. Cores are known for transformers, chokes, converters etc. Like. Made of tape-shaped core material wrap. For example, winding cores have already been manufactured in such a way that @ .that the core is initially pre-wound with the dimensions of the finished state and was then subjected to a heat treatment. The outer turn of the so treated Kernes was then led through the winding of about the transducer and rewound on it around the core from the outside in. The main advantage of this procedure is in that the core turns always maintain the same position to one another. However the core still has to be tightened at the end. Furthermore, it is already known the core without any special measure in an ordinary way, such as a winding coil finishes winding up. Since, however, the core material is generally known is very hard, this production method, as simple as it looks, is very difficult, if not impracticable.

This is the simplest way of applying winding cores can now be carried out practically without further ado when one according to the invention the band-shaped Core material after riding on a mandrel of the same diameter as the finished one Core has been wound up and then heat treated to a transition state rewound, the previous outer turn with about the same diameter inside comes to rest and: then winds the tape onto the winding.

To protect the winding, a lengthwise or lengthwise split is expedient slotted or double insulating cylinder on the spool upset, the simple attachment provided at the end of the strip-shaped material Allows inflection.

In the drawing is an embodiment of the manufacturing process shown according to the invention.

In Fig. I, a band-shaped wound core is shown.

Figs. Z to 4 show end sections of the core tape.

Figure 5 shows the manufacturing stage of the core in the transition state again, and Figure 6 shows the core band in the transition state.

With your bracket or the bracket according to Fig. 7, the outer end of the wound tape can be held.

Fig. 8 shows the bracket attached to the core.

The fig.9 illustrates how the first turns of the ribbon-shaped Core to be applied to the bobbin.

Figs. I o, ii and 12 show different possibilities how an insulating cylinder is designed to protect the winding when the core tape is applied can be.

Fig. 13 shows in section the band-shaped, magnetic core applied to the winding, which is shown in side view in Fig. 14. According to Fig. I, the core 12 consists of a thin, magnetic tape which is wound up spirally, the inner diameter being selected so that the core has the same diameter as in the finished state on the winding leg. For better handling or fastening, the end of the tape can be cut as shown in Figures 2, 3 or 4. The core prepared in this way is then heat-treated in order to relieve the internal tension of the work tone. The end 15 of the tape 12 located on the mandrel 13 is then rewound between two rollers 16, 17, which are individually or both driven, into a transition state 14, the inner diameter being approximately equal to the outer diameter 12 of the original reel, as from the position the turn 1 8 can be seen. For better handling, the coil can be fastened with a bracket ig as shown in Figs. 7 and 8. As can be seen from FIG. 9, an insulating cylinder is placed around the insulation 2o of the winding ii in order to facilitate the application of the band-shaped core material. The insulating cylinder can have the design shown in Figs. B. consist of two halves 24 with slots 25 and 26 or a double insulating cylinder 24 and 27, the slots 28, 2c) are offset at right angles to the slots 25, 26, or according to Fig. 12 from a cylinder 22 with an axial Groove 23 exist.

An inflection 45 is made on the circumference of the band 3o in such a way that it engages in the axial groove 23 of the insulating cylinder 22. By turning the end 30 z. B. by hand, the core can be applied according to Figs. 13 and 14. In order to accelerate this process or, especially in the case of large devices, to facilitate it, a device is used which is shown in Fig. 9. A frame (not shown) carries the coil 14 in the transitional state and the winding leg i i. Adjustably mounted rollers 3 i, which are held by arms (not shown), press the magnetic tape firmly against the spool core i i during winding. A drive motor with gear box 34 drives shafts 35 and 36 in opposite directions and, via conical gear train 43, 44, drives the disks 39, 40 seated on shafts 32, 33. By means of a belt connection 4i. 42 the rollers 31 are driven by disks 37, 38. After the magnetic tape is completely wound up in this way to form a core according to Fig. 13, 14, the end of the tape is z. B. fastened by spot welds 46, as can be seen in FIG.

Claims (2)

PATENT CLAIMS: i. Method for applying strip-shaped core material on fully wound coils or windings of transformers, chokes or the like, characterized in that, after the band-shaped core material on a mandrel wound with the same diameter as the finished core and then heat-treated -has been rewound, the tape is rewound in a transitional state, the previous one outer turn with about the same diameter comes to lie inside and then on the winding is wound. 2. The method according to claim i, characterized in that that when the core material is applied to the winding, two driven rollers brought up to the core loop from the outside, causing the core to rotate and press the individual core turns tightly together.