Workpiece cutting method

Patent metadata

Field	Value
Publication number	US-10259058-B2
Application number	US-201113702977-A
Country	US
Kind code	B2
Filing date	Jun 10, 2011
Priority date	Jun 17, 2010
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A workpiece cutting method basically includes providing a workpiece proximate to a first blade including a first cutting edge. The method further comprises moving a second blade including a second cutting edge in contact with the first blade such that the first and second cutting edges of the first and second blades cooperatively engage to cut the workpiece while maintaining the first and second cutting edges parallel to each other.

First claim

What is claimed is:

1. A workpiece cutting method comprising:
providing a workpiece proximate to a first blade including a first cutting edge;
pressing a moveable component comprising a second blade, the second blade including a second cutting edge and a guide section having a slanted surface, toward the first blade such that the slanted surface of the second blade contacts and slides against the first blade to adjust a position of the second blade before the first and second cutting edges contact each other to eliminate a gap between the first and second cutting edges and such that the first and second blades contact each other and the first and second cutting edges are maintained parallel to each other while the first and second blades cooperatively engage to cut the workpiece, the gap extending in a direction transverse to a cutting direction;
moving the second blade with respect to the first blade after cutting to create a positive clearance, in the direction transverse to the cutting direction, between the first and second cutting edges; and
moving the second blade from a dead bottom position to a dead top position while the gap between the first blade and the second blade is set to the positive clearance such that the first blade and the second blade do not contact while the second blade moves from the dead bottom position to the dead top position,
the moveable component being continuously pressed during cutting in an X-direction, the X-direction being parallel to a side of the first and second blades and perpendicular to a vertical movement direction of the second blade.

2. The workpiece cutting method according to claim 1 , wherein
the moving of the second blade is performed while maintaining the first blade in a fixed position such that the cutting of workpiece is performed with the first blade being fixed.

3. The cutting method according to claim 2 , wherein
the moving includes moving the second blade transverse to the first blade while maintaining the first and second cutting edges parallel to each other.

4. The workpiece cutting method according to claim 1 , wherein
the moving includes moving the second blade transverse to the first blade while maintaining the first and second cutting edges parallel to each other.

5. The cutting method according to claim 1 , wherein
the moveable component is pressed by a component selected from the group consisting of: a spring plunger, a spring, and a rubber member.

6. A workpiece cutting apparatus comprising:
a stationary plate including a first blade having a first cutting edge;
a moving plate facing opposite the stationary plate and configured to move toward the stationary plate;
a moveable component that is disposed on a surface of the moving plate that faces the stationary plate, the moveable component being moveable along a plane of the surface and including a second blade having a second cutting edge, the second blade including a guide section having a slanted surface;
a pressing component configured to press the moveable component along the plane of the surface of the moving plate when the moving plate moves toward the stationary plate such that the first and second blades contact each other, the pressing component being further configured to press the moveable component toward the first blade to maintain the first and second cutting edges parallel to each other while the first and second blades cooperatively engage to cut the workpiece, the slanted surface of the second blade being configured to contact and slide against the first blade and to adjust a position of the second blade before the first and second cutting edges contact each other to eliminate a gap extending in a direction transverse to a cutting direction between the first and second cutting edges; and
an actuator configured to press the moveable component in an opposite direction respective to the pressing component after the first and second blades have cut the workpiece, the actuator being further configured to create a positive clearance between the first and second cutting edges in a direction transverse to the cutting direction so that as the second blade moves from a dead bottom position to a dead top position the gap between the first blade and the second blade is set to the positive clearance such that the first blade and the second blade do not contact while the second blade moves from the dead bottom position to the dead top position,
the pressing component being configured to continuously apply a pressing force on the moveable component during cutting in an X-direction, the X-direction being parallel to a side of the first and second blades and perpendicular to a vertical movement direction of the second blade.

7. The workpiece cutting apparatus according to claim 6 , wherein
the pressing component includes an elastic member configured to provide a reaction force to press the moveable component toward the first blade.

8. The workpiece cutting apparatus according to claim 7 , wherein:
the moveable component is configured to move in a direction perpendicular to the first cutting edge of the first blade.

9. The workpiece cutting apparatus according to claim 7 , wherein:
the second blade is configured to be slanted at a shear angle such that a tip end of the second cutting edge of the second blade is farther from the first blade than a base end of the second cutting edge of the second blade.

10. The workpiece cutting apparatus according to claim 7 , wherein:
at least one of the first and second blades includes a diamond-like carbon coating applied to a surface thereof.

11. The workpiece cutting apparatus according to claim 6 , wherein:
the moveable component is configured to move in a direction perpendicular to the first cutting edge of the first blade.

12. The workpiece cutting apparatus according to claim 11 , wherein:
the second blade is configured to be slanted at a shear angle such that a tip end of the second cutting edge of the second blade is farther from the first blade than a base end of the second cutting edge of the second blade.

13. The workpiece cutting apparatus according to claim 11 , wherein:
at least one of the first and second blades includes a diamond-like carbon coating applied to a surface thereof.

14. The workpiece cutting apparatus according to claim 6 , wherein:
the second blade is configured to be slanted at a shear angle such that a tip end of the second cutting edge of the second blade is farther from the first blade than a base end of the second cutting edge of the second blade.

15. The workpiece cutting apparatus according to claim 14 , wherein:
at least one of the first and second blades includes a diamond-like carbon coating applied to a surface thereof.

16. The workpiece cutting apparatus according to claim 6 , wherein:
at least one of the first and second blades includes a diamond-like carbon coating applied to a surface thereof.

17. The workpiece cutting apparatus according to claim 6 , wherein
the pressing component is selected from the group consisting of: a spring plunger, a spring, and a rubber member.

Assignees

• Shijo Akihiro
• Mitamura Kazuhiro
• Ikeda Akihiko
• Ueda Syunji
• Matsunae Hiroki
• Yamamoto Keisuke
• Nissan Motor

Inventors

• Shijo Akihiro
• Mitamura Kazuhiro
• Ikeda Akihiko
• Ueda Syunji
• Matsunae Hiroki
• Yamamoto Keisuke

Classifications

• B23D15/002 Primary

  for cutting in more than one direction, e.g. angle cutting · CPC title

• B23D35/001

  cutting members · CPC title

• Y10T83/874

  Straight line positioning · CPC title

• B23D35/005

  Adjusting the position of the cutting members · CPC title

• B26D2001/002

  Materials or surface treatments therefor, e.g. composite materials · CPC title