Magnet cutting device

Patent metadata

Field	Value
Publication number	US-10668641-B2
Application number	US-201414896979-A
Country	US
Kind code	B2
Filing date	Apr 25, 2014
Priority date	Jun 13, 2013
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

The magnet cutting device includes a pair of supporting portions spaced apart by a predetermined distance and configured to support the magnet from a bottom side, a blade configured to press the magnet supported by the pair of supporting portions from an upper side of the magnet, and a magnet supporting tool arranged between the pair of supporting portions to support the magnet from the bottom side of the magnet. A surface of the magnet supporting tool to be held in contact with the magnet is shaped such that a central part of an upper end is higher than the upper ends of the pair of supporting portions and an end part of the upper end is lower than the upper ends of the pair of supporting portions when the magnet is placed on the surface, the upper end having a slope connecting the central part and the end part.

First claim

The invention claimed is:

1. A cutting device for a magnet, the device comprising:
a pair of supporting portions spaced apart by a predetermined distance, the pair of the supporting portions being configured to support the magnet from a bottom side of the magnet;
a pressing portion configured to press the magnet from an upper side of the magnet;
a blade configured to press downwardly on the upper side of the magnet to cut the magnet by three-point bending by the pair of supporting portions and the blade; and
a magnet supporting tool arranged adjacently between the pair of the supporting portions, configured to vertically move, and having an upper surface including a central part configured to be in contact with the magnet from the bottom side and a peripheral end, the peripheral end configured not to be in contact with the magnet,
wherein:
the pair of the supporting portions respectively have top surfaces configured to support the magnet from the bottom side when the pressing portion presses the magnet,
the magnet supporting tool is further configured to cause, in a state where the pressing portion does not press the magnet, the central part to be located at a position higher than the top surfaces while causing the peripheral end to be located at a position lower than the top surfaces, and
the upper surface of the magnet supporting tool comprises a slope connecting the central part and the peripheral end.

2. The cutting device according to claim 1 , wherein:
the magnet supporting tool includes a pair of protruding portions, each of the pair of the protruding portions having an upward contact face and formed by a part of an outer end part of the magnet supporting tool protruding toward a corresponding one of the pair of the supporting portions in a state where the magnet supporting tool is arranged between the pair of the supporting portions;
each of the pair of the supporting portions includes a space portion to accommodate a corresponding one of the pair of the protruding portions and includes a downward contact face which delimits an upper end of the space portion; and
the magnet supporting tool is further configured to cause the central part to be located at the position higher than the top surfaces in a state where the upward contact face of the each of the pair of the protruding portions is in contact with the downward contact face of a corresponding one of the pair of supporting portions.

3. The cutting device according to claim 1 , wherein:
the magnet supporting tool includes an opening end at least at a part of the upper surface the magnet supporting tool configured to blow out air from the opening end.

4. The cutting device according to claim 1 , wherein:
the magnet supporting tool includes an opening end at least at a part of the upper surface and is configured to suction air from the opening end.

5. The cutting device according to claim 1 , wherein the magnet includes grooves located on a lower side of the magnet, the cutting device further comprising a positioning tool configured to align a one of the grooves of the magnet with the blade.

6. The cutting device according to claim 5 , wherein the positioning tool is configured to:
position the magnet such that the one of the grooves is located below a lateral center of the blade;
retract to a position away from the magnet before the magnet is cut;
return to at position in contact with the magnet after the magnet is cut; and
reposition the magnet such that a next one of the grooves of the magnet is positioned to be located below the lateral center of the blade.

7. The cutting device according to claim 1 , comprising a spring, wherein the magnet supporting tool is vertically movable by an elastic force of the spring.

8. The cutting device according to claim 7 ,
wherein the spring is compressed via the magnet supporting tool held in contact with the magnet when the blade presses the upper side of the magnet downwardly.

Assignees

• Nissan Motor

Inventors

• Ohshima Takumi
• Hasegawa Kiyoshi
• Nishimura Kimio
• Sekikawa Takashi
• Matsushita Yasushi
• Hori Akihisa
• Kishi Michito

Classifications

• B28D1/28

  without cutting edge {, e.g. chiseling machines} · CPC title

• B26F3/00 Primary

  Severing by means other than cutting; Apparatus therefor (severing by grinding B24B27/06) · CPC title

• H01F41/0253

  for manufacturing permanent magnets · CPC title

• H04Q2213/13003

  Constructional details of switching devices · CPC title

• H01F41/0286

  Trimming · CPC title