Band Saw Blade and Cutting Method

• US 20080121079A1
• Filed: 08/18/2005
• Published: 05/29/2008
• Est. Priority Date: 08/19/2004
• Status: Active Grant

• Current Assignee: Amada Company Limited
• Original Assignee: Amada Company Limited
• Inventors: Tsujimoto, Susumu, Nagano, Yuji, Hashimoto, Toshiyuki
• Granted Patent: US 8,051,756 B2
• Time in Patent Office: Days
• US Class Current: 83/14
• CPC Class Codes: B23D 55/082 Devices for guiding strap saw blades
• CPC Class Codes: B23D 55/088 Devices for feeding strap saw blades
• CPC Class Codes: B23D 61/123 Details of saw blade body
• CPC Class Codes: Y10T 83/04 Processes
• CPC Class Codes: Y10T 83/0405 With preparatory or simultaneous ancillary treatment of work
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor
• CPC Class Codes: Y10T 83/935 Plural tooth groups

Abstract

Concave/convex portions are consecutively formed on a back of a band saw blade. The concave/convex portions include concave portions engageable with and disengageable from a backup guide of a band saw guide unit, and convex portions adjacent to the concave portions. A length of each of the concave/convex portions is configured to be equal to or smaller than four times a maximum pitch of a tooth top of each tooth.

Claims

1. A band saw blade provided with a plurality of teeth and configured to be slidably supported by a band saw guide unit of a band saw machine, the band saw blade comprising:

a plurality of concave and convex portions that are consecutively formed on a rear of the band saw blade,

wherein each of the concave portions is configured to be engageable with and disengageable from a backup guide of the band saw guide unit;

each of the convex portions is adjacent to each of the concave portions; and

a length of each of the concave and convex portions is equal to or smaller than four times a maximum pitch of a tooth top of the teeth.

2. The band saw blade according to claim 1, wherein

a length of each of the concave and convex portions is equal to or smaller than three times the maximum pitch of the tooth top of the teeth.

3. The band saw blade according to claim 1, wherein

each of the concave portions and each of the convex portions are classified into a plurality of types according to the length of each of the concave portions and each of the convex portions.

4. The band saw blade according to claim 1, wherein

the concave portions among the plurality of concave portions and the plurality of convex portions are classified into a plurality of types according to a length of each of the concave portions.

5. The band saw blade according to claim 1, wherein

the concave portions among the plurality of concave portions and the plurality of convex portions are classified into a plurality of types according to a depth of each of the concave portions.

6. A band saw blade provided with a plurality of teeth and configured to be slidably supported by a band saw guide unit of a band saw machine, the band saw blade comprising:

a plurality of notches consecutively formed on a rear of the band saw blade, each of the plurality of notches being configured to be engageable with and disengageable from a backup guide of the band saw guide unit,

wherein a length of each of the notches is equal to or smaller than four times a maximum pitch of a tooth top of the teeth.

7. The band saw blade according to claim 6, wherein

the length of each of the notches is equal to or smaller than three times the maximum pitch of the tooth top of each of the teeth.

8. A cutting method comprising:

causing a band saw blade to continuously and circularly run in such a manner that the band saw blade is supported by a band saw guide unit of a band saw machine;

cutting a workpiece in a cutting region by relatively moving a band saw housing of the band saw machine in a cutting direction in which the band saw housing is approaching the workpiece; and

vibrating the band saw blade in a band width direction in the cutting region, thereby generating vibration.

9. The cutting method according to claim 8, wherein

a plurality of concave and convex portions are consecutively formed on a rear of the band saw blade;

each of the plurality of concave portions and each of the plurality of convex portions are arranged so as to be adjacent to one another;

the vibration is generated such that the concave portion is alternately engaging with and disengaging from a backup guide provided in the band saw guide unit; and

a length of each of the concave portions and each of the convex portions is equal to or smaller than four times a maximum pitch of a tooth top of the teeth.

10. The cutting method according to claim 9, wherein

an amplitude of the vibration of the band saw blade is equal to or greater than 0.1 mm and equal to or less than 0.5 mm.

11. The cutting method according to claim 9, wherein

a frequency of the vibration of the band saw blade is equal to or greater than 5 Hz.

12. The cutting method according to claim 8, wherein

a plurality of notches are consecutively formed on a rear of the band saw blade;

the vibration is generated such that each of the notches is alternately engaging with and disengaging from a backup guide provided in the band saw guide unit; and

a length of a concave/convex portion of each notch is equal to or smaller than four times a maximum pitch of a tooth top of a plurality of teeth provided on the band saw blade.

13. The cutting method according to claim 12, wherein

an amplitude of the vibration of the band saw blade is equal to or greater than 0.1 mm and equal to or less than 0.5 mm.

14. The cutting method according to claim 12, wherein

a frequency of the vibration of the band saw blade is equal to or greater than 5 Hz.