Saw blade and method for arranging saw teeth

Patent metadata

Field	Value
Publication number	US-9821391-B2
Application number	US-201314412022-A
Country	US
Kind code	B2
Filing date	Jul 1, 2013
Priority date	Jul 17, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A saw blade includes a group A (group A1 [=straight tooth+the odd number of set teeth]+group A2 [=straight tooth+the even number of set teeth]) and a group B (group B1 [=straight tooth+the odd number of set teeth having opposite set-bending sides to those in the group A1]+group B2 [=straight tooth+the even number of set teeth having opposite set-bending sides to those in the group A2]). Wide and narrow set teeth are arranged so that a max/min ratio of the number of pitches between the narrow set teeth having identical set-bending side and set width is 1.8 or less, and a max/min ratio of the number of pitches between the wide set teeth having identical set-bending side set width is 2.7 or less.

First claim

The invention claimed is:

1. A saw blade including straight teeth and set teeth, each of the set teeth having a set-bending side that is set to one of a left and a right side of the straight teeth, each of the set teeth having a width that is set to one of a wide-width and a narrow-width, wherein a width of the wide-width is larger than a width of the narrow-width, the blade comprising:
a first arrangement of teeth that is composed of, successively from a cutting leading side, a first group of teeth composed of a first straight tooth among the straight teeth and an even number of a first sub-group of set teeth among the set teeth, and a second group of teeth that is sequentially next to the first group of teeth and is composed of a second straight tooth among the straight teeth and an odd number of a second sub-group of set teeth among the set teeth, and
a second arrangement of teeth that is sequentially next to the first arrangement of teeth, and is composed of, successively from the cutting leading side, a third group of teeth composed of a third straight tooth among the straight teeth and an even number of a third-subgroup of set teeth having set-bending sides that are opposite to those of the even number of the first sub-group of set teeth in the first group of teeth, and a fourth group of teeth that is sequentially next to the third group of teeth and is composed of a fourth straight tooth among the straight teeth and an odd number of a fourth sub-group of set teeth whose set-bending sides are opposite to those of the odd number of the second sub-group of set teeth in the second group of teeth, wherein
the first arrangement of teeth and the second arrangement of teeth are arranged alternately and repeatedly, and
wide set teeth having the wide-width and narrow set teeth having the narrow-width are arranged so that a ratio of a maximum value to a minimum value of the number of pitches between the narrow set teeth having an identical set-bending side and an identical set width is 1.8 or less, and a ratio of a maximum value to a minimum value of the number of pitches between the wide set teeth having an identical set-bending side and an identical set width is 2.7 or less.

2. The saw blade according to claim 1 , wherein
each of the group first group of teeth and the third group of teeth includes four set teeth, and each of the second group of teeth and the fourth group of teeth includes three set teeth.

3. The saw blade according to claim 2 , wherein,
arrangements of saw teeth, successively from the cutting leading side, in the first arrangement of teeth and the second arrangement of teeth are set as follows:
the first group of teeth including: successively, the first straight tooth; a first left-side narrow set tooth, among the first sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; a first right-side narrow set tooth, among the first sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; a first left-side wide set tooth, among the first sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; and a first right-side wide set tooth, among the first sub-group of set teeth, having the set-bending side set to the right side of the straight teeth;
the second group of teeth including: successively, the second straight tooth; a second left-side narrow set tooth, among the second sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; a second right-side wide set tooth, among the second sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; and a second left-side wide set tooth, among the second sub-group of set teeth, having the set-bending side set to the left side of the straight teeth;
the third group of teeth including: successively, the third straight tooth; a second right-side narrow set tooth, among the third sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; a third left-side narrow set tooth, among the third sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; a third right-side wide set tooth, among the third sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; and a third left-side wide set tooth, among the third sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; and
the fourth group of teeth including: successively, the fourth straight tooth; a third right-side narrow set tooth, among the fourth sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; a fourth left-side wide set tooth, among the fourth sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; and a fourth right-side wide set tooth, among the fourth sub-group of set teeth, having the set-bending side set to the right side of the straight teeth.

4. The saw blade according to claim 2 , wherein,
arrangements of saw teeth, successively from the cutting leading side, in the first arrangement of teeth and the second arrangement of teeth are set as follows:
the first group of teeth including: successively, the first straight tooth; a first left-side narrow set tooth, among the first sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; a first right-side wide set tooth, among the first sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; a first left-side wide set tooth, among the first sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; and a first right-side narrow set tooth, among the first sub-group of set teeth, having the set-bending side set to the right side of the straight teeth;
the second group of teeth including: successively, the second straight tooth; a second left-side narrow set tooth, among the second sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; a second right-side wide set tooth, among the second sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; and a second left-side wide set tooth, among the second sub-group of set teeth, having the set-bending side set to the left side of the straight teeth;
the third group of teeth including: successively, the third straight tooth; a second right-side narrow set tooth, among the third sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; a third left-side wide set tooth, among the third sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; a third right-side wide set tooth, among the third sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; and a third left-side narrow set tooth, among the third sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; and
the fourth group of teeth including: successively, the fourth straight tooth; a third right-side narrow set tooth, among the fourth sub-group of set teeth, having the set-bending side set to the right side of the straight teeth; a fourth left-side wide set tooth, among the fourth sub-group of set teeth, having the set-bending side set to the left side of the straight teeth; and a fourth right-side wide set tooth, among the fourth sub-group of set teeth, having the set-bending side set to the right side of the straight teeth.

5. The saw blade according to claim 2 , wherein,
arrangements of saw teeth, successively from the cutting leading side, in the first arrangement of teeth and the second arrangement

Assignees

• Amada Co Ltd
• Amada Machine Tools Company Ltd

Inventors

• Tsujimoto Susumu
• Ueyama Takeshi

Classifications

• B23D65/00

  Making tools for sawing machines or sawing devices for use in cutting any kind of material · CPC title

• B23D61/121 Primary

  Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet · CPC title

• Y10T83/9348

  Undulating tooth arrangement · CPC title

• B23D61/1216 Primary

  Repeating pattern of groups having three or more teeth · CPC title