Rectangular wire edgewise-bending processing device and rectangular wire edgewise-bending processing method

Patent metadata

Field	Value
Publication number	US-9646764-B2
Application number	US-201414646876-A
Country	US
Kind code	B2
Filing date	Jan 21, 2014
Priority date	Jan 22, 2013
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

Provided is a rectangular wire edgewise-bending processing device for performing an edgewise-bending process for a rectangular wire to form a coil, the rectangular wire edgewise-bending processing device including a fixing unit for fixing the rectangular wire, a pressing tool for pressing a surface formed by a long side of a rectangular cross section of the rectangular wire, and a bending tool for bending the rectangular wire into a predetermined coil shape, wherein the edgewise-bending process is performed while the surface formed by the long side of the rectangular cross section of the rectangular wire is pressed.

First claim

The invention claimed is:

1. A rectangular wire edgewise-bending processing device for performing an edgewise-bending process for a rectangular wire to form a coil, wherein one surface formed by a long side of a rectangular cross section of the rectangular wire is a first surface, a surface opposite to the first surface is a second surface, a surface, formed by a short side of the rectangular cross section of the rectangular wire, which corresponds to an inner circumferential surface side of the coil to be formed, is a third surface, and a surface opposite to the third surface, which corresponds to an outer circumferential surface side of the coil to be formed, is a fourth surface, the rectangular wire edgewise-bending processing device comprising:
a fixing member for fixing a straight portion of the rectangular wire;
a bending tool including:
a shaft being rotatable and cylindrical and having a rotational axis extending in a short-side direction of the rectangular cross section of the rectangular wire, the shaft allowing the third surface to contact with an outer circumferential surface of the shaft in such a positional relationship that the rotational axis of the shaft is perpendicular to a longitudinal direction of the rectangular wire; and
a flange attached to the shaft, the flange having a flange board surface for pressing the first surface,
and having a bending guide protruding from the flange board surface in the same direction as the shaft, so as to contact with the fourth surface; and

a pressing tool for pressing the second surface toward the flange, with the rectangular wire held between the pressing tool and the flange board surface of the flange, wherein the pressing tool includes:
a pressing member having a press surface for pressing the rectangular wire;
a rotation base fixing an end portion, of the bending tool, at a side where the flange does not exist, the rotation base rotating integrally with the bending tool;
a press guide placed on the rotation base; and
a wedge-shaped member movable frontward and backward perpendicularly to the shaft while being guided by the press guide, between the pressing member and the press guide, thereby causing the pressing member to move upward and downward along a slope of the wedge-shaped member.

2. The rectangular wire edgewise-bending processing device according to claim 1 , wherein the pressing tool has:
the press surface for pressing a part, of the rectangular wire, on the inner circumferential surface side of the coil to be formed; and
an out-of-surface deformation regulating surface stepped down from the press surface, for regulating out-of-surface deformation of the rectangular wire via a gap between the out-of-surface deformation regulating surface and the rectangular wire.

3. The rectangular wire edgewise-bending processing device according to claim 1 , wherein the bending guide contacts, surface-to-surface, with the fourth surface.

4. The rectangular wire edgewise-bending processing device according to claim 1 , wherein a positional relationship between the pressing tool and the bending tool does not relatively change during a bending process.

5. The rectangular wire edgewise-bending processing device according to claim 1 , wherein a fringe of the press surface is chamfered.

6. The rectangular wire edgewise-bending processing device according to claim 1 , wherein a fringe of the press surface is rounded.

7. A rectangular wire edgewise-bending processing method for performing an edgewise-bending process for a rectangular wire, wherein one surface formed by a long side of a rectangular cross section of the rectangular wire is a first surface, a surface opposite to the first surface is a second surface, a surface, formed by a short side of the rectangular cross section of the rectangular wire, which corresponds to an inner circumferential surface side of a coil to be formed, is a third surface, and a surface opposite to the third surface, which corresponds to an outer circumferential surface side of the coil to be formed, is a fourth surface, wherein
the third surface contacts with an outer circumferential surface of a shaft that is rotatable and cylindrical and has a rotational axis extending in a short-side direction of the rectangular cross section of the rectangular wire, the rectangular wire edgewise-bending processing method comprising:
a pressing step of plastically deforming the rectangular wire to decrease a sheet thickness which is a length of the short side of the rectangular cross section; and
a bending step of bending the rectangular wire so that the third surface is bent along the outer circumferential surface of the shaft, while the rectangular wire is pressed in the pressing step, wherein, in the pressing step, a bending guide presses the fourth surface along with rotation of a bending tool which includes a flange attached to the shaft, the flange having a flange board surface for pressing the first surface, and having the bending guide protruding from the flange board surface in the same direction as the shaft, so as to contact with the fourth surface.

8. The rectangular wire edgewise-bending processing method according to claim 7 , wherein, in the pressing step, a part, of the rectangular wire, on the inner circumferential surface side of the coil to be formed, is pressed.

9. The rectangular wire edgewise-bending processing method according to claim 7 , wherein, in the pressing step, the rectangular wire is plastically deformed so that the sheet thickness is decreased 1%.

Assignees

• Mitsubishi Electric Corp

Inventors

• Shirai Yutaro
• Akita Hiroyuki
• Sakaue Atsushi
• Yoshida Shinichiro
• Inoue Masaya

Classifications

• B21F3/04

  externally on a mandrel or the like · CPC title

• B21F1/00

  Bending wire other than coiling; Straightening wire · CPC title

• H01F41/065 Primary

  Electricity · mapped topic

• H01F41/082

  Devices for guiding or positioning the winding material on the former · CPC title

• H01F2017/046

  helical coil made of flat wire, e.g. with smaller extension of wire cross section in the direction of the longitudinal axis · CPC title