ISO 4875-1:2006 金属切断帯鋸刃 — Part 1: 語彙 | ページ 2

2.1 ブレード要素

2.1.6

側

歯付きエッジとバックエッジの間の平らな面

図 1 —ブレード要素

Key

1	基準面 (2.2.11)
2	バックエッジ (2.1.5)
3	体（2.1.2）
4	側面 (2.1.6)
5	歯（2.1.3）
6	歯付きエッジ (2.1.4)

2.2.1 単位長さあたりのピッチと歯数

2.2.1.2

単位長さあたりの歯数

長さ 25.4 mm あたりの完全な歯の数

注記単位長さあたりのピッチと歯は相互に逆数です。

図 2 —単位長さあたりのピッチと歯数

Key

1	単位長さあたりの歯数 (2.2.1.2)
2	ピッチ (2.2.1.1)
3	体（2.1.2）
4	幅 (2.1.7)

2.2.7

ルート半径

1 つの歯の面と前の歯の側面を結ぶ半径

図 3 —その他の特徴

Key

1	顔（2.2.4）
2	刃先 (2.2.2)
3	ルート半径 (2.2.7)
4	側面 (2.2.5)
5	食道 (2.2.6)
6	高さ (2.2.3)
7	フェースアングル (2.2.10)

2.2.9

レーキ

想定される非設定歯の面と基準面の間の角度

図 4 —レーキの例

Key

1	負のレーキ
2	正のレーキ
3	基準面 (2.2.11)

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 4875-1 was prepared by Technical Committee ISO/TC 29, Small tools.

This second edition cancels and replaces the first edition (ISO 4875-1:1978), which has been technically revised.

ISO 4875 consists of the following parts, under the general title Metal-cutting band saw blades:

• Part 1: Vocabulary
• Part 2: Characteristics and dimensions

1 Scope

This part of ISO 4875 establishes a vocabulary of terms relating to metal-cutting band saw blades. It is subdivided into terms and definitions related to the elements of the blade, to the characteristics of the teeth, and to tooth shapes and set types.

2 Terms and definitions

2.1 Blade elements

2.1.1

band saw blade

endless blade manufactured of a continuous strip having one toothed edge

2.1.2

body

part of the blade between the bottom of the gullet and the back edge

2.1.3

teeth

serrations formed across the thickness of the blade to provide cutting edges

2.1.4

toothed edge

edge along which the teeth have been formed

2.1.5

back edge

longitudinal edge parallel to the toothed edge

2.1.6

side

flat surface between the toothed edge and the back edge

Figure 1 — Blade elements

Key

1	reference plane (2.2.11)
2	back edge (2.1.5)
3	body (2.1.2)
4	side (2.1.6)
5	tooth (2.1.3)
6	toothed edge (2.1.4)

2.1.7

width

overall distance between the point of the tooth and the back edge

2.1.8

thickness

distance between the two sides of the body

2.2 Characteristics of the teeth

2.2.1 Pitch and teeth per unit length

2.2.1.1

pitch

distance between the apices of adjacent teeth measured in millimetres

2.2.1.2

teeth per unit length

number of complete teeth per 25,4 mm length

Note 1 to entry: Pitch and teeth per unit length are mutual reciprocals.

Figure 2 — Pitch and teeth per unit length

Key

1	teeth per unit length (2.2.1.2)
2	pitch (2.2.1.1)
3	body (2.1.2)
4	width (2.1.7)

2.2.1.3

variable pitch

cycle of a suite of different pitch indicated by the biggest pitch and the smallest pitch expressed in number of teeth per unit length of 25,4 mm

EXAMPLE:

Variable pitch 6/10: i.e. the largest pitch is 6 teeth per unit of length and the smallest pitch is 10 teeth per unit of length.

2.2.2

cutting edge

edge of the face which is intended to perform cutting, formed by the intersection of the flank and the face

2.2.3

height

distance from the point of the tooth to the deepest portion of the gullet

2.2.4

face

surface over which the chip flows

2.2.5

flank

surface over which the surfaces produced on the workpiece pass, extended to the root radius

2.2.6

gullet

space bounded by the face, root radius and flank which permits chip removal

2.2.7

root radius

radius connecting the face of one tooth and the flank of the preceding one

Figure 3 — Other characteristics

Key

1	face (2.2.4)
2	cutting edge (2.2.2)
3	root radius (2.2.7)
4	flank (2.2.5)
5	gullet (2.2.6)
6	height (2.2.3)
7	face angle (2.2.10)

2.2.8

wedge angle

angle between the face and the flank of a non-set tooth

2.2.9

rake

angle between the face and the reference plane of the assumed non-set tooth

Figure 4 — Examples of rake

Key

1	negative rake
2	positive rake
3	reference plane (2.2.11)

2.2.10

face angle

complementary angle of the cutting angle and the wedge angle

2.2.11

reference plane

plane through the selected point on the cutting edge chosen so as to be perpendicular to the blade back edge

2.3 Tooth set and overall set

2.3.2

overall set

total thickness of the blade between two opposite teeth, taking into account the set on either side of the blade and determining the overall width of cut

Figure 5 — Tooth set and overall set

Key

1	overall set (2.3.2)
2	side (2.1.6)
3	tooth set (2.3.1)
4	thickness (2.1.8)

2.4 Tooth shapes

2.4.1

regular tooth

standard tooth

tooth having zero degree rake angle and full round gullets

Note 1 to entry: It can be furnished in alternative, raker, wavy or group set.

Figure 6 — Regular/standard tooth

2.4.2

skip tooth

tooth of basically regular tooth shape, every alternate tooth being removed

Note 1 to entry: A large pitch is thus obtained with a longer gullet without making the tooth depth too great at the expense of blade strength.

Figure 7 — Skip tooth

2.4.3

positive tooth

tooth similar to standard tooth but with a positive rake

Figure 8 — Positive tooth

2.4.4

positive skip tooth

tooth similar to skip tooth but with a positive rake

Figure 9 — Positive skip tooth

2.4.5

variable pitch tooth

standard tooth or positive rake tooth having a suite of different pitch

Figure 10 — Variable pitch tooth

2.5 Types of set

2.5.1

alternate set

transverse setting of individual teeth, alternately set to the right and to the left

Note 1 to entry: For metal (ferrous) working band saw blades, this type of set is not standard.

Figure 11 — Alternate set

2.5.2

raker set

set where the teeth are one set to the right, one set to the left, and one unset

Figure 12 — Raker set

2.5.3

wavy set

transverse setting of groups of teeth, set to the right and to the left, with regularly varying sets

Figure 13 — Wavy set

2.5.4

grouping set

set having at least one non-set followed by several teeth set to the right and to the left

Figure 14 — Grouping set