Winding apparatus and coil component manufacturing method

Patent metadata

Field	Value
Publication number	US-10910154-B2
Application number	US-201815977863-A
Country	US
Kind code	B2
Filing date	May 11, 2018
Priority date	May 12, 2017
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A winding apparatus includes a wire position support including first and second wire route hole in which first and second wires, respectively, are inserted, a winding driver that orbitally revolves the wire position support around a core of a coil component such that the first and second wires are wound around the core while twisted, a rotator that rotates the core, and a controller that controls the winding driver and the rotator. The controller performs first control, which orbitally revolves the wire position support in a first direction and rotates the core in an opposite second direction opposite, and second control, which orbitally revolves the wire position support in the second direction and rotates the core in the first direction, and switches between the first and second controls based on a predetermined condition, to prevent a kink of a wire between a wire feeder and a wire position support.

First claim

What is claimed is:

1. A winding apparatus for a coil component in which wires are wound around a core, the winding apparatus comprising:
a wire position support including wire route holes in which the wires are inserted;
a wire feeder that feeds the wires to the wire position support such that tension is applied to the wires;
a winding driver that orbitally revolves the wire position support around the core such that the wires are wound around the core while twisted;
a rotator that rotates the core; and
a controller that controls the winding driver and the rotator, such that the controller performs
first control, in which the wire position support is orbitally revolved in a first rotation direction and the core is rotated in a second rotation direction that is of an opposite direction to the first rotation direction, and
second control, in which the wire position support is orbitally revolved in the second rotation direction and the core is rotated in the first rotation direction,
and the controller switches between the first control and the second control based on a predetermined condition.

2. The winding apparatus according to claim 1 , wherein:
the predetermined condition is the number of orbital revolutions of the wire position support; and
the number of orbital revolutions of the wire position support in the first control is equal to the number of orbital revolutions of the wire position support in the second control.

3. The winding apparatus according to claim 1 , wherein:
the predetermined condition is the number of products of the coil component; and
the controller repeats a cycle, in which the wires are wound around one core based on the first control and the wires are wound around next one core based on the second control.

4. The winding apparatus according to claim 1 , wherein an absolute value of a speed of the wire position support relative to the core in the first control is equal to an absolute value of a speed of the wire position support relative to the core in the second control.

5. The winding apparatus according to claim 1 , wherein the controller switches between the first control and the second control in preference to the predetermined condition when the number of twists that is of a number in which the wires are twisted between the core and the wire position support reaches an upper limit.

6. A winding apparatus for a coil component in which wires are wound around a core, the winding apparatus comprising:
a wire position support including wire route holes in which the wires are inserted;
a wire feeder that feeds the wires to the wire position support such that tension is applied to the wires;
a winding driver that orbitally revolves the wire position support around the core such that the wires are wound around the core while twisted; and
a controller that controls the winding driver, such that the controller performs
first control, in which the core is not rotated but the wire position support is orbitally revolved in a first rotation direction with respect to the core, and
second control, in which the core is rotated and the wire position support is orbitally revolved in a second rotation direction with respect to the core that is of an opposite direction to the first rotation direction,
and the controller switches between the first control and the second control based on a predetermined condition,

wherein in the second control, the controller sets the rotation speed of the core faster than the orbital revolution speed of the wire position support.

7. The winding apparatus according to claim 6 , wherein:
the predetermined condition is the number of orbital revolutions of the wire position support; and
the number of orbital revolutions of the wire position support in the first control is equal to the number of orbital revolutions of the wire position support in the second control.

8. The winding apparatus according to claim 6 , wherein:
the predetermined condition is the number of products of the coil component; and
the controller repeats a cycle, in which the wires are wound around one core based on the first control and the wires are wound around next one core based on the second control.

9. The winding apparatus according to claim 6 , wherein an absolute value of a speed of the wire position support relative to the core in the first control is equal to an absolute value of a speed of the wire position support relative to the core in the second control.

10. The winding apparatus according to claim 6 , wherein the controller switches between the first control and the second control in preference to the predetermined condition when the number of twists that is of a number in which the wires are twisted between the core and the wire position support reaches an upper limit.

11. A method for manufacturing a coil component in which wires are wound around a core, the coil component manufacturing method comprising:
a core preparation process of preparing the core;
a winding starting process of hooking a winding starting end in the wires inserted in wire route holes of a wire position support on an electrode corresponding to the winding starting end in the core while tension is applied to the wires by a wire feeder;
a winding process of orbitally revolving the wire position support in an opposite direction to a rotation direction of the core while rotating the core, and winding the wires around the core while twisting the wires;
a winding ending process of hooking a winding ending end in the wires on an electrode corresponding to the winding ending end in the core; and
a fixing process of fixing the winding starting end to the electrode corresponding to the winding starting end in the core, and fixing the winding ending end to the electrode corresponding to the winding ending end in the core,
such that in the winding process, switching between first control and second control is performed based on a predetermined condition
the first control, in which the wire position support is orbitally revolved in a first rotation direction and the core is rotated in a second rotation direction that is of an opposite direction to the first rotation direction, and
the second control, in which the wire position support is orbitally revolved in the second rotation direction and the core is rotated in the first rotation direction.

12. The coil component manufacturing method according to claim 11 , wherein:
the predetermined condition is the number of orbital revolutions of the wire position support; and
in the winding process, the number of orbital revolutions of the wire position support in the first control is equal to the number of orbital revolutions of the wire position support in the second control.

13. The coil component manufacturing method according to claim 11 , wherein:
the predetermined condition is the number of products of the coil component; and
a cycle, in which the wires are wound around one core based on the first control and the wires are wound around next one core based on the second control, is repeated in the winding process.

14. The coil component manufacturing method according to claim 11 , wherein in the winding process, an absolute value of a speed of the wire position support relative to the core in the first control is equal to an absolute value of a speed of the wire position support relative to the core in the second control.

15. The coil component manufacturing method according to claim 11 , wherein in the winding process, the controller switches between the first control and the second control in preference to the predetermined condit

Assignees

• Murata Manufacturing Co

Inventors

• Yamaguchi Chihiro

Classifications

• B65H54/2896

  Flyers · CPC title

• B65H2701/37

  Tapes · CPC title

• B65H57/26

  Supports for guides · CPC title

• B65H54/026

  Doubling winders, i.e. for winding two or more parallel yarns on a bobbin, e.g. in preparation for twisting or weaving · CPC title

• H01F41/07 Primary

  Twisting · CPC title