GB/T 23340-2018Internal combustion engines—Connecting-rods—Specification (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 23340-2009 "internal combustion engine connecting rod technical conditions." This standard compared with GB/T 23340-2009, the main technical changes are as follows.

--- Modified internal combustion engine forged steel link range description (see Chapter 1, 2009 Edition Chapter 1);

--- Increasing the normative references (see Chapter 2);

--- Modify the connecting rod bolts, bushings and other components described (see 3.1, 2009 edition 3.1);

--- Increasing the link rod and connecting rod cover the material used (see 3.2);

--- Modify the link rod and connecting rod cover heat treatment methods and the hardness range (see 3.3, 2009 edition 3.3);

--- Modify 40Cr material performance requirements (see 3.4, 2009 edition 3.4);

--- Increasing the performance requirements of materials such as 50Mn (see 3.4);

--- Modify the representation of the metal macro organization (see 3.5, 2009 version 3.5);

--- Modify the forged steel connecting rod metallographic rules (see 3.6.1 and 3.6.2, 2009 version 3.6);

--- Modify the main parts of the connecting rod and the provisions of the surface roughness (see 3.7, 2009 version 3.7);

--- Modify the surface quality requirements rod (see 3.10.1, 2009 version 3.10.1);

--- Modify the detection of connecting rod hardness provisions (see 4.1.1, 2009 edition 4.1.1);

--- Modify the provisions of the connecting rod mechanical properties of the sample (see 4.2.1.1, 2009 edition 4.2.1.1);

--- Increasing the surface roughness detection equipment (see 4.5);

--- Modify the detection of size tolerance parts and connecting rod head hole center distance detection requirements (see 4.6.1.4.6.2, 2009 edition 4.6.1, 4.6.2);

--- Modify the description of each connecting rod (see 5.1, 2009 version 5.1);

--- Modify the equivalent form of auxiliaries (see 5.2, 2009 edition 5.2);

--- Modify the title of the modifier, delete the contents of the pairing logo (see 6.1.1, 2009 edition 6.1.1);

--- Amend the merger of the box and the box should be marked on the outside of the provisions (see 6.1.2, 2009 version 6.1.2, 6.1.3);

--- Revised the provisions of the total mass of crates (see 6.2.5, 2009 version 6.2.5);

--- Modify the product rust regulations (see 6.4, 2009 version 6.4).

1 Scope

This standard specifies the internal combustion engine forged steel connecting rod (including connecting rod body, connecting rod cover, connecting rod bolt, connecting rod nut and connecting rod bushings) technical requirements, Test methods, inspection rules and signs, packaging, transportation, storage.

This standard applies to reciprocating piston internal combustion engine forged steel connecting rod (hereinafter referred to as "connecting rod") with cylinder diameter not more than 200mm.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

Tensile testing of metallic materials - Part 1. Test methods at room temperature

GB/T 229 Charpy pendulum impact test method for metallic materials

GB/T 230.1 Metallic materials Rockwell hardness test - Part 1. Test methods (A, B, C, D, E, F, G, H, K, N, T standard ruler)

GB/T 231.1 Brinell hardness test of metallic materials - Part 1. Test methods

GB/T 699 high-quality carbon structural steel

GB/T 1184-1996 Tolerances on shape and position tolerances

GB/T 1958 Geometrical product specifications (GPS) shape and position tolerance testing requirements

GB/T 2828.1 Sampling procedures for inspection - Part 1. Batch inspection sampling plan by acceptance quality limit (AQL)

GB/T 3077 alloy structural steel

GB/T 3821 small and medium power internal combustion engine cleanliness limits and methods of measurement

Tolerances and machining allowances for steel forgings GB/T 12362-2003

Metallographic structure of steel die forgings grading charts and evaluation methods

JB/T 6721.2 Internal combustion engine connecting rods - Part 2. Magnetic particle inspection

JB/T 7292.1 Internal combustion engine bushings connecting rod sleeve technical conditions

Internal combustion engines - Bolts and nuts - Part 2. Technical specifications for connecting rod bolts

JB/T 9764 internal combustion engine winding rod bushing technology

Quality inspection methods for shot peening of steel parts

Explosion linkages for internal combustion engines - Technical specifications

JB/T 12661 Internal Combustion Engine Connecting Rod Fatigue Test Method

3 Technical requirements