Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
1999-02-26
2001-10-02
Hall, Carl E. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S850000, C140S092100, C140S092200
Reexamination Certificate
active
06295720
ABSTRACT:
The present invention relates to a method for manufacturing a coil arrangement according to claim
1
, and a device for carrying out a method of this type according to the preamble of claim
5
.
In order to manufacture coil arrangements having a plurality of differently constructed coils or coils with different orientations, it has been customary to date to manufacture the coils individually and then to contact them with one another in a subsequent manufacturing process, resulting in the desired coil arrangement. This method proves to be complex, not least owing to the difficult handling of the extremely thin winding wire ends of the coils during the contacting. In addition, different winding tools need to be used for differently dimensioned coils in order to manufacture the individual coils.
It is therefore the object of the present invention to propose a method and a device, by means of which the manufacture of coil arrangements of the above type can be simplified.
This object is attained by a method having the features of claim
1
and a device having the features of claim
5
.
The method according to the invention allows for the manufacture of a coil arrangement with a plurality of winding wire regions constructed in superimposed winding wire planes in a winding tool with the following method steps:
fixing of the winding wire in a first wire holding device at the circumferential edge of a basic matrix,
rotation of the winding tool with a brace at a distance from the basic matrix so as to lay the winding wire against an additional matrix arranged on the basic matrix and formation of a first winding wire region arranged on the surface of the basic matrix,
closure of the winding tool by displacing the brace towards the surface of the basic matrix and rotation of the winding tool so as to lay the winding wire on the winding circumference of the basic matrix and formation of a further winding wire region as coil element,
fixing of the coil element and rotation of the winding tool with brace at a distance from the matrix surface of the basic matrix so as to lay the winding wire against the additional matrix and formation of a further winding wire region arranged above the coil element, and
fixing of the winding wire in a second wire holding device at the circumferential edge of the basic matrix.
Depending on the shape or number of windings of the further winding wire region, this can be formed as a connecting wire region for contacting the first coil element or even as a further coil element directly connected to the first coil element.
In a particularly advantageous variant of the method according to the invention, the first winding wire region formed against the additional matrix and the second winding wire region formed against the additional matrix are guided over connecting surfaces of a chip unit arranged on the surface of the basic matrix and a contacting of the winding wire regions with the connecting surfaces of the chip unit is then effected.
In this variant of the method, the winding wire regions defined in their path by the additional matrix are used to form coil wire ends prepared in their orientation for contacting with connecting surfaces of a chip unit. Consequently, a contacting of the coil wire ends with the connecting surfaces of a chip unit is advantageously possible in the winding tool, without having to position the chip unit as a function of the orientation of the coil wire ends.
It has proved particularly advantageous in this context if, prior to forming the first winding wire end region between two matrix elements of the additional matrix arranged on the basic matrix, the chip unit is fitted into a holding device of the basic matrix.
If, following the contacting, a cutting of winding wire ends formed in the region between the wire holding devices and the additional matrix is effected in each case at two cutting points in the region between the connecting surfaces of the chip unit and the wire holding devices, it is possible to already effect the removal of excess wire regions, i.e. winding wire ends of the coil arrangement projecting beyond the connecting surfaces of the chip unit, in the winding tool per se, so that a subsequent, separate handling of the coil arrangement to this end can be dispensed with.
The winding tool according to the invention for manufacturing a coil arrangement formed in the above manner and fashion comprises a matrix arranged on a matrix support and a holding arrangement arranged at the circumference of the matrix on the matrix support with at least two holding devices for holding winding wire end regions and a brace arranged opposite the matrix support and adjacent the matrix, the matrix being constructed as a basic matrix, and with an additional matrix arranged on the basic matrix, and the brace being variable in its arrangement relative to the basic matrix.
This relative arrangement of the basic matrix and additional matrix allows for the type of method for manufacturing a coil arrangement as explained in detail above.
In a particularly advantageous embodiment of the winding tool, the additional matrix comprises at least two matrix elements, which are arranged either side of a holding device arranged on the basic matrix for the positioning accommodation of a chip unit, the matrix elements being arranged and constructed in such a manner that winding wire regions extending along a winding circumference of the additional matrix defined by the matrix elements comprise an overlap position with connecting surfaces of a chip unit arranged in the holding device.
Constructed in this manner, the winding tool can be used to manufacture a coil arrangement comprising a coil element formed on the basic matrix and a chip unit, the additional matrix being used to form winding wire regions which are precisely defined in their orientation and which allow for a direct contacting of the coil element wound in the winding tool with the chip unit.
In a particularly simple embodiment, the matrix elements of the additional matrix are constructed as cylinder rods.
If a wire deflecting device is arranged adjacent a matrix element of the additional matrix in such a manner that the intermediate space between the matrix element and the wire deflecting device forms an engagement space for a wire gripping device, excess wire ends can be removed from the winding tool in a simple manner.
REFERENCES:
patent: 1944870 (1934-01-01), Apple
patent: 537 086 (1973-06-01), None
patent: 43 07 064 A1 (1994-09-01), None
patent: 43 32 055 A1 (1995-03-01), None
patent: 44 08 124 A1 (1995-09-01), None
patent: WO 91/16718 (1991-10-01), None
patent: WO 92/15105 (1992-09-01), None
Finn David
Rietzler Manfred
Hall Carl E.
McGlew & Tuttle P.C.
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