JB/T 10478:2004 Machining allowance & tolerance for rolled ring
1 Scope
This standard specifies the machining allowance and tolerance of hot-rolled rings made of structural steel, tool steel, stainless steel, heat-resistant steel, superalloy, titanium alloy, copper alloy and aluminum alloy through rolling by ring rolling machine.
This standard is applicable to the determination of machining allowance (hereinafter referred to as allowance) and tolerance of hot-rolled rings produced by ring rolling machine, with the maximum outer diameter of not greater than φ5500mm, the minimum inner diameter of not less than 1/2 of the maximum outer diameter and the maximum height of not greater than 700mm.
2 Normative references
The following standard contains provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 8541 Terminology of forging and stamping
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 8541 as well as the following apply.
3.1
hot-rolled ring
ring forging through hot rolling by the ring rolling machine specially for ring rolling
3.2
excess metal
metal added between some steps or transitions of hot-rolled ring to meet the needs of hot-rolled ring rolling process and simplify the sectional shape of hot-rolled ring, as shown in Figure 1
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 General requirements 4.1 Shape classification of hot-rolled rings 4.2 Material factor 4.3 Wall thickness factor 4.4 Shape complexity factor 4.5 Allowance and tolerance 4.6 Geometric tolerance 5 Allowance and tolerance Annex A (Informative) Use of machining allowance & tolerance
Standard
JB/T 10478-2004 Machining allowance & tolerance for rolled ring (English Version)
JB/T 10478:2004 Machining allowance & tolerance for rolled ring
1 Scope
This standard specifies the machining allowance and tolerance of hot-rolled rings made of structural steel, tool steel, stainless steel, heat-resistant steel, superalloy, titanium alloy, copper alloy and aluminum alloy through rolling by ring rolling machine.
This standard is applicable to the determination of machining allowance (hereinafter referred to as allowance) and tolerance of hot-rolled rings produced by ring rolling machine, with the maximum outer diameter of not greater than φ5500mm, the minimum inner diameter of not less than 1/2 of the maximum outer diameter and the maximum height of not greater than 700mm.
2 Normative references
The following standard contains provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 8541 Terminology of forging and stamping
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 8541 as well as the following apply.
3.1
hot-rolled ring
ring forging through hot rolling by the ring rolling machine specially for ring rolling
3.2
excess metal
metal added between some steps or transitions of hot-rolled ring to meet the needs of hot-rolled ring rolling process and simplify the sectional shape of hot-rolled ring, as shown in Figure 1
Contents of JB/T 10478-2004
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Shape classification of hot-rolled rings
4.2 Material factor
4.3 Wall thickness factor
4.4 Shape complexity factor
4.5 Allowance and tolerance
4.6 Geometric tolerance
5 Allowance and tolerance
Annex A (Informative) Use of machining allowance & tolerance
