DE2731106A1 - Prodn. of wire wound HF chokes and other components - involves automatic insertion of two tinned metal pins in core blind holes and insertion of coils in series without gaps into drying oven - Google Patents

Abstract

The coils have each axial leads and a former. Two short cylindrical thinned metal pins are automatically inserted into and fastened by, e.g. glueing, in blind holes of the former. Individual coils are automatically, and without gaps between them, placed in a drying oven. Being close together they cannot move and the pins cannot fall out. The formers are automatically fed to a winding station. During winding they are aranged next to each other without gaps and continuously passed through the winding position. The wound wire is fastened to the pins during the components passage through a further drying oven. The endless series of coils so produced is cut into individual ones. A copper lead is fastened at each end of the individual coil immediately after the winding process, or later.

Description

Wire-wound component and process for its manufacture

The invention relates to wire-wound components such as RF chokes and other wire-wound passive components with axial lead wires, for example Wirewound resistors, as well as a method for the production of such components.

HF chokes usually consist of a ferrite core with one each Blind hole on both ends, in which the two connecting wires are attached are, as well as a winding made of electrically good conductive wire; the respective Ends of the winding are conductively connected to the connecting wires.

The manufacture of such components is extremely difficult and very labor-intensive and cannot be carried out fully automatically using known methods. The instant one Production usually proceeds as follows: The axial connecting wires are cut and by hand in the front blind holes of the ferrite cores inserted into which a certain amount of glue was previously applied by hand became. Then the already wired elements are dried in an oven. Great care must be taken when transporting the elements to prevent them from falling out the wires that are still loose are avoided. A fully automatic loading of the furnace can not. After the adhesive has hardened and the components have cooled down the parts are placed in winding devices by hand in order to carry out the winding. This is usually done so that one end of the winding wire on the connecting wire soldered, welded or glued on by hand, then gradually increasing Speed the winding is carried out, and that finally the second The end of the winding wire is set on the second connecting wire and the winding wire is cut off The clamping and unclamping of the parts as well as the determination of the start of the winding and the end of the winding is ultimately done by hand.

The object of the invention is to address the disadvantages outlined above Eliminate the production of these components and the production is much easier to shape, as well as to create a cheaper and better quality component.

This is achieved according to the invention in that in the blind holes of the core two short, preferably cylindrical, and on the outer surface tinned metal pins are inserted and fastened fully automatically, e.g. glued in that these parts are fully automatically and seamlessly one after the other in a drying oven be pushed, with the mutually pushing parts holding together, so that a falling out of the metal pins is prevented that the cores with electrical conductive wire are wound in such a way (before connecting the axial wires), that the components compulsorily a fully automatic working winding station fed in, lined up in a row without gaps during the winding process, endless run through the wrapping position and at the same time be wrapped around that the winding wire as the parts pass through another dryer be attached to the connection pins, so that the endless snake produced in this way of components is separated into individual elements and that immediately afterwards on this or at a later point in time on the individual elements on each face a copper connecting wire is attached, preferably welded.

According to a further invention, a wire-wound component is the Proposed type specified initially, the winding body in the end face Blind bores each have a short metal pin at the outer ends Connecting wires are attached, e.g. welded on.

The production of such wire-wound components brings in addition the rationalization effect the additional advantage, d the connecting wires during of the manufacturing process is not yet connected to the components to be processed and therefore cannot be bent during the manufacturing process or cannot oxidize during hardening.

The invention is explained below in conjunction with the drawing of exemplary embodiments explained. They show: FIG. 1 in a schematic representation and partly in section a wire-wound component of conventional design, Fig. 2 in a schematic representation and partially in section, a winding body for a wire-wound component according to the invention, FIGS. 3a to 3d show the manufacturing process of a wire-wound component according to the invention, FIG. 4 shows a further embodiment of the invention corresponding to the stage according to FIG. 3d, FIG. 5 shows another embodiment the connection of the connection wire with the connection pin, partly in section, and FIG. 6 based on a series of winding bodies arranged one behind the other Method of wrapping according to the present, Invention.

In Fig. 1, there is a wire-wound component such as a wire-wound one Resistance of known design with a winding body 1 in the form of a ferrite core shown, at the recesses extending in the axial direction at the end faces 2 and 3 are provided, in the tinned copper connecting wires 4, 5 are glued. The winding body 1 is wrapped with copper wire 6. The copper connecting wires 4 and 5 have a length which corresponds to a multiple of the winding body 1.

In Fig. 2, on the other hand, a wire-wound component according to the Invention with a winding body or ferrite core 7 dar-i provided that on his has recesses 8, 9 on both end faces into which, with the aid of an adhesive 10 tinned cylindrical connecting pins 11, 12 are used on their outer surface, are preferably glued in. The connecting pins 11, 12 protrude in the inserted state by a fraction of the length of the winding body from its end faces.

The production of such a wire-wound component results 3, only the right part of the component 7 according to FIG. 2 being shown is. In the recess 9 of the ferrite body 7 adhesive 10 is introduced, the The pin 12 is inserted and glued with the adhesive 10 in this recess.

Then the body 7 is wound with a wire winding 13, the Winding 13 continued over the pin 12 with a winding 14 of reduced diameter will. The resulting queue of components becomes the continuous Separating device that interrupts the winding is separated again into individual components. After the separation has taken place, a connecting wire is attached to the outer end of the pin 12 15 and e.g.

attached by means of welded joint 16.

In Fig. 4 is another embodiment of the connection between Connection wire and bobbin shown. Instead of the recess 9 according to FIG in this case a connection plate 18 is attached to the winding body 17, for example glued on. At a connecting wire 20 is attached to this connection plate 18, for example by means of Welded joint 21.

Fig. 5 shows a further embodiment of the connection between Terminal pin and lead wire. Here is in the recess 22 of the winding body 23 a tube 24 is inserted into which the connecting wire 25 is inserted so far is that by mechanical movement an inseparable connection between 24 and 25 is produced, as indicated schematically in FIG.

The production process for the individual components can be shown schematically refer to FIG. 6. The winding bodies 26 are fed via an automatic feeding device a glue dosing station 27, from there fully automatically into position 28 transported further, where the connecting pins are inserted into the recesses. Then the components provided with connecting pins are completely one behind the other lined up and sent by the drive device 29 through a drying oven 30, where the glue is cured. Subsequently, the components go through the Winding station 31, in which the winding process due to a relative movement between the respective component and the winding station is carried out; the Winding station 31 itself rotate while the components are not about their longitudinal axis move, or the components can be relative to a fixed winding device circulate. At 32 there is another drying oven indicating which one the wire is in set on the pins, e.g.

is soldered on. 33 shows a separating device between two adjacent wire connection points. This separation or Separation can be carried out by grinding, turning, melting or the like will. Finally, the individual components can be used further fed, in particular a point at which the connecting wires are attached.

Claims (6)

Patent claims (1; i method for producing wire-wound Components, e.g. HF chokes or other wire-wound passive components with axial connecting wires and winding bodies, characterized in that in blind holes of the core two short, preferably cylindrical, and on the outer surface tinned metal pins are inserted and fastened fully automatically, e.g. glued in that the individual components are automatically and seamlessly one after the other in a drying oven are pushed, whereby the mutually sliding parts hold together so that the metal pins are prevented from falling out Cores are wound with electrically conductive wire in such a way that the components forcibly fed to a fully automatic winding station while of the wrapping process lined up one behind the other without gaps, endless through the wrapping position guided and wrapped around that the winding wire during the passage of the components attached to the connecting pins by another drying oven is that the endless line of components thus produced into individual elements is separated, and that immediately afterwards or at a later point in time a copper connection wire is attached to the individual elements on each end face will. 2. Wire-wound component, in particular HF choke or other wire-wound passive component with axial connecting wires and winding bodies, characterized in that the winding body (7; 17; 23) on both of its end faces therewith firmly connected connection elements (11, 12; 18, 24) on-j with which the Connecting wires (4, 5; 15, 20; 25) are firmly connected. 3. Component according to claim 2, characterized in that in the axial Recesses (8, 9; 22) of the winding body (a '; 23) AI1 closing elements (11; 12) inserted, are preferably glued, with which the connecting wires (12; 15) are firmly connected are. 4. The component according to claim 2, characterized in that with the Front sides of the winding body (17) connecting plate (1) connected, preferably are glued, with which the connecting wires (20) are firmly connected. 5. Component according to claim 2, 3 or!;, Characterized in, that the fixed connection between connecting elements (11, 12; 18) and connecting wires (15; 20) a soldering or Welded connection (16; 21) is. 6. The component according to claim 2, 3 or 4, characterized in that the fixed connection is a mechanical connection, e.g. is a crimp connection (24).