Winding apparatus and coil component manufacturing method

Patent metadata

Field	Value
Publication number	US-10832865-B2
Application number	US-201815977838-A
Country	US
Kind code	B2
Filing date	May 11, 2018
Priority date	May 12, 2017
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

A winding apparatus for a coil component in which wires are wound around a core. The winding apparatus includes 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. The controller controls a rotation direction of the core with regard to an orbital revolution direction of the wire position support and an orbital revolution speed of the wire position support to prevent generation of a kink of a wire between a wire feeder and the 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 a rotation direction of the core is matched with an orbital revolution direction of the wire position support and an orbital revolution speed of the wire position support is faster than a rotation speed of the core; and
second control, in which the rotation direction of the core is matched with the orbital revolution direction of the wire position support, which is the opposite direction to the rotation direction of the core and the orbital revolution direction of the wire position support in the first control, and the orbital revolution speed of the wire position support is slower than the rotation speed of the core,
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;
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 core is not rotated but the wire position support is orbitally revolved in a first rotation direction; and
second control, in which the core is rotated in a second rotation direction that is of an opposite direction to the first rotation direction, the wire position support is orbitally revolved in the second rotation direction, and a rotation speed of the core is faster than an orbital revolution speed of the wire position support,
and the controller switches between the first control and the second control based on a predetermined condition.

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;
a winding process of orbitally revolving the wire position support in a direction identical to a rotation direction of the core while rotating the core, and winding the wires around the core while twisting the wires, 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 rotation direction of the core is matched with an orbital revolution direction of the wire position support and an orbital revolution speed of the wire position support is faster than a rotation speed of the core; and
the second control, in which the rotation direction of the core is matched with the orbital revolution direction of the wire position support, which is the opposite direction to the rotation direction of the core and the orbital revolution direction of the wire position support in the first control, and the orbital revolution speed of the wire position support is slower than the rotation speed of the core;

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.

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

Assignees

• Murata Manufacturing Co

Inventors

• Yamaguchi Chihiro

Classifications

• B65H54/2896

  Flyers · CPC title

• B65H2701/37

  Tapes · 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

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F41/069

  Winding two or more wires, e.g. bifilar winding · CPC title