JB/T 7963.1-1997 JB/T 7963.1-1997 Metal cutting band saw blades Part 1 Definitions and terms JB/T7963.1-1997 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T7963.1～7963.3-1997
Metal Cutting Band Saw Blades
Published on August 18, 1997
Ministry of Machinery Industry of the People's Republic of China
Implementation on January 1, 1998
JB/T7963.11997
This standard is equivalent to ISO4875/-1978 "Metal Cutting Band Saw Blades Part 1: Definitions and Terminology". Since the definitions and terminology of metal cutting band saw blades listed in ISO4875/1 are basically consistent with relevant domestic and foreign standards, and are coordinated with relevant domestic and foreign standards, they are equivalent to adoption. JB/T7963, under the general title of "Metal Cutting Band Saw Blades", includes three parts: Part 1 (JB/T7963.1): Definitions and terms; Part 2 (JB/T7963.2): Basic dimensions and tolerances; Part 3 (JB/T7963.3): Types and characteristics. This standard is proposed and managed by the National Technical Committee for Tool Standardization. The main drafting units of this standard are: Hunan Machine Tool Factory and Benxi Tool Factory. The main drafters of this standard are: Xu Ziwen, Zhang Shuhua, Li Langgui, and Deng Fang. From the date of entry into force, this standard will also replace JB/T7963.1-1995 "Terms and Definitions for Metal Cutting Band Saw Blades" (formerly GB6079.1-85).
JB/T 7963. 11997
ISO (International Organization for Standardization) is a worldwide alliance of national standards associations (ISO member bodies). The preparation of International Standards is normally carried out by ISO technical committees. Each member body has the right to be represented on a committee for which a technical committee has been established. International organizations (governmental and non-governmental) in liaison with ISO may also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval and then approved as International Standards by the ISO Council.
International Standard ISO 4875/I was prepared by Technical Committee ISO/TC29 (Tools) and circulated to the member bodies in August 1976.
This standard has been adopted by the member bodies of the following countries: Australia
Belgium
Czechoslovakia
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Italy
Mexico
Romania
Republic of South Africa
No member body has expressed disagreement with this document. Spain
Turkey
Yugoslavia
1 Scope
Machinery Industry Standard of the People's Republic of China
Metal Cutting Band Saw Blades
Part 1: Definitions and Terminology
This standard specifies the definitions of metal cutting band saw blades. The definitions are arranged as follows:
Band saw blade elements and sawtooth characteristics (Chapter 3); Tooth shape (Chapter 4);
Tooth type (tooth offset) (Chapter 5). JB/T7963.1—1997
idt ISO 4875/11978
Other requirements for metal cutting band saw blades are specified in JB/T7963.2-1997 and JB/T7963.3-1997. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T12204—90
Basic terms before metal cutting
JB/T7963.2-1997 Metal cutting band saw blades Part 2: Basic dimensions and tolerances
JB/T7963.3-1997 Metal cutting band saw blades Band saw blade elements and sawtooth characteristics
Part 3; Types and characteristics
Band saw blades are annular saw blades made of a continuous steel strip with teeth on one side, as shown in Figure 1. 3.1 Band saw blade elements
3.1.1 Blade body: The part of the saw blade between the bottom of the tooth groove and the back edge (Figures 1 and 2). 3.1.2 Teeth: Teeth that span the thickness of the strip to form a cutting edge (Figure 1). 3.1.3 Toothed edge: A longitudinal edge on the saw blade with teeth (Figure 1). 3.1.4 Back edge: A longitudinal edge parallel to the toothed edge (Figure 1). 3.1.5 Side: The plane between the tooth edge and the arm edge (Figure 1 and Figure 5). 3.1.6 Width: The distance between the tooth tip and the back edge (Figure 2). 3.1.7
Thickness: The distance between the two sides of the saw blade body (Figure 5). Base surface (3.2.9)
Factory back (3.1.4)
Strip body (3.1.1)
According to teeth (3.1.2)
Opening edge (3.1,3)
Approved by the Ministry of Machinery Industry on August 18, 1997
Thank surface (3.1.5)
Implemented on January 1, 1998
3.2 Sawtooth characteristics
3.2.1 Tooth pitch and number of teeth per unit length
JB/T7963.1-1997
3.2.1.1 Tooth pitch: the distance between two adjacent teeth, measured in millimeters (Figure 2). 3.2.1.2 Number of teeth per unit length: the number of complete teeth within a length of 25mm (1in) (Figure 2). Note: The tooth pitch per unit length and the number of teeth are the quotient of each other. 3.2.2 Cutting edge: The front edge used for cutting, which is formed by the intersection of the front and back faces (Fig. 3). 3.2.3 Tooth depth: The distance from the tooth top to the lowest part of the tooth groove (Fig. 3). 3.2.4 Front: The surface of the tooth on which the chips flow (Fig. 3). 3.2.5
Back: The surface of the tool on which the surface machined on the workpiece passes (Fig. 3). Tooth groove: The chip space bounded by the front face of the tooth, the arc at the bottom of the tooth and the back face (Fig. 3). Tooth bottom arc radius: The radius of the arc connecting the front face of the tooth and the back face of the previous tooth (Fig. 3). 3.2.8 Die angle: The angle between the front face and the back face of an undivided saw tooth (Fig. 3). 26mm (1in) distance micro (3.2.1.2)
transmission distance (3.2.1.1)
【“》Book
feeling (3.2.6)
back (3.2.5)
ability to arc light (3.2.7)
move the edge (3.3.2)
die angle (3.2.8)
3.2.9 base plane; a plane passing through a selected point on the cutting edge and perpendicular to the back edge (Figure 1). 3.2. 10 Rake angle: The angle between the front face and the base surface of the assumed undivided tooth (Fig. 4). 3.3 Rake amount and total rake amount
(91)
JB/T7963.1-1997
3.3.1 Rake amount: The amount of protrusion of the saw teeth to the side to form the cutting front image (Fig. 5). 3.3.2 Total rake amount: The total thickness of the saw blade between two opposing teeth, taking into account the rake amount on each side, which determines the total width of the cut (Fig. 5).
Total tooth quantity (3.3.2)
Rake angle example
Side (3.1.5)
Negative rake angle
Positive rake angle
Component (3.3.1)
The tooth shape of the sawtooth can vary according to the requirements of manufacture and use. The basic tooth shapes are as follows: Which surface (3.1.5)
Thickness (3.1.7)
Rake quantity (3.3.1)
4.1 Normal tooth or standard tooth: zero rake angle and full Saw teeth with circular arc teeth (Fig. 6). This type of saw teeth can be made into alternating, oblique or wave-shaped teeth (see Chapter 5).
4.2 Skip teeth: The shape of the saw teeth is basically a normal tooth, but each alternate tooth is cut off, so that the maximum distance tooth groove is obtained and the tooth depth is not too large. Therefore, the strength of the saw blade is not lost (Fig. 7).
Hook teeth: Except that the rake angle of the saw teeth is positive, the tooth shape is similar to the skip teeth (Fig. 8). 4.3
5 Split tooth form (saw tooth offset)
JB/T 7963.11997
5.1 Alternating toothing: The horizontal toothing of each saw tooth is alternately divided to the left and right (Figure 9). Note: This toothing form is not a common toothing form for band saw blades used to cut metal (ferrous metal). Figure 9
5.2 Oblique toothing: The horizontal toothing of each saw tooth is divided, one to the left, one to the right, and the other is not divided (Figure 10). Figure 10
5.3 Wave toothing: The horizontal toothing of a group of saw teeth changes regularly to the left and right (Figure 11). DUUUNU
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