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GB/T 25361.1-2022: Internal combustion engines - Piston pins - Part 1: General specifications
Status: Valid GB/T 25361.1: Evolution and historical versions
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| GB/T 25361.1-2022 | English | 604 |
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Internal combustion engines - Piston pins - Part 1: General specifications
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GB/T 25361.1-2022
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| GB/T 25361.1-2010 | English | 794 |
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Internal combustion engines -- Piston pins -- Part 1: General specifications
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GB/T 25361.1-2010
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PDF similar to GB/T 25361.1-2022
Basic data | Standard ID | GB/T 25361.1-2022 (GB/T25361.1-2022) | | Description (Translated English) | Internal combustion engines - Piston pins - Part 1: General specifications | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J92 | | Classification of International Standard | 27.020 | | Word Count Estimation | 33,334 | | Date of Issue | 2022-10-12 | | Date of Implementation | 2023-02-01 | | Older Standard (superseded by this standard) | GB/T 25361.1-2010 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 25361.1-2022: Internal combustion engines - Piston pins - Part 1: General specifications---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Internal combustion engines - Piston pins - Part 1.General specifications
ICS 27.020
CCSJ92
National Standards of People's Republic of China
Replace GB/T 25361.1-2010
Piston pins for internal combustion engines - Part 1.Technical requirements
(ISO 18669-1.2021, IDT)
Released on 2022-10-12
2023-02-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface V
Introduction VI
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
3.1 General 1
3.2 Piston pin geometry and manufacturing features 1
3.2.1 Pin Hole Type 1
3.2.2 Outer edge structure 2
3.2.3 Other features 2
4 symbols 2
5 proper nouns 3
5.1 External, internal and end features 3
5.2 Outer edge and inner chamfer structure 5
5.2.1 Chamfered outer edge structure 6
5.2.2 Double chamfer outer edge structure 6
5.2.3 Rounded outer edge structure 7
5.2.4 Chamfer positioning type outer edge structure 7
5.3 Outer edge transition zone structure 8
6 code 9
7 Piston pin code marked 9
7.1 Labeling elements and order 9
7.1.1 Mandatory elements 9
7.1.2 Additional elements 10
7.2 Annotation example 10
8 Piston pin types, dimensions and tolerances 10
8.1 Manufacturing type 10
8.2 Dimensions and tolerances 11
8.2.1 Outer diameter and geometric tolerances 11
8.2.2 Inner diameter tolerance 12
8.2.3 Length (l1) and gauge length (l5) tolerances 12
8.2.4 Outer edge profile 13
8.2.5 Internal edge profile 14
8.2.6 Taper hole size 15
8.2.7 Central skin size 17
9 Materials and heat treatment 18
9.1 Material type 18
9.2 Core hardness/core strength 19
9.3 Depth of carburizing and nitriding hardening layer 19
9.4 Surface hardness 20
9.5 Volume change 20
10 General features 21
10.1 Surface roughness 21
10.1.1 Machined surface roughness 21
10.1.2 Coating surface roughness 21
10.1.3 Surface roughness of inner hole of cold extruded and seamless cold drawn piston pin 22
10.2 Piston pin marking 22
10.3 Others 22
10.3.1 Cleanliness 22
10.3.2 Antirust 22
10.3.3 Remanence 22
10.3.4 Packaging 22
11 Quality requirements 22
11.1 Material characteristics 22
11.1.1 Decarbonization 22
11.1.2 Network cementite 22
11.1.3 Nitride layer 22
11.1.4 Grinding burns 23
11.2 Material defects 23
11.2.1 Cracks 23
11.2.2 Cold extrusion forming stripes 23
11.3 Surface defects 23
Reference 25
Figure 1 Cylindrical piston pin 4
Figure 2 Figure 1 partial view W 4
Fig. 3 Cold extrusion forming central continuous skin type piston pin 5
Fig. 4 Cold-extruded end skin-type piston pin 5
Figure 5 Tapered hole piston pin 5
Figure 6 Outer edge structure (partial view X. chamfer; partial view Y. rounded corner) 6
Figure 7 Chamfered outer edge structure (partial view X in Figure 6) 6
Fig. 8 Double-chamfered outer rib structure (partial view X in Fig. 6) 6
Figure 9 Rounded outer edge structure (Partial view Y in Figure 6) 7
Figure 10 Chamfer-positioned outer edge 7 for circular snap rings
Figure 11 Figure 10 Partial View Z 8
Figure 12 Outer edge transition zone structure 1 (partial views X and Y in Figure 6) 8
Figure 13 Structure 2 of the outer edge transition zone (partial views X and Y in Figure 6) 11
Figure 14 Outer rib structure 13
Figure 15 Inner chamfer structure 15
Figure 16 Tapered hole structure 16
Figure 17 Central skin size 17
Table 1 Symbol 3
Table 2 code and description 9
Table 3 Piston pin manufacturing type 10
Table 4 Outer diameter (d1) and geometric tolerance 11
Table 5 Waviness 12
Table 6 Inner diameter tolerance and concentricity when wall thickness is a12
Table 7 Length Tolerance and End Runout 12
Table 8 End face groove and end face step of code LB piston pin 13
Table 9 Dimensions of rounded outer edges 14
Table 10 Dimensions of chamfered outer edge 14
Table 11 Inner chamfer size 15
Table 12 Taper hole angle (α) and diameter (d3) tolerance 16
Table 13 Taper hole runout tolerance (e) and taper hole inscribed table (k) 17
Table 14 Chemical composition, mechanical and physical properties 18
Table 15 Core Hardness 19
Table 16 Depth of Hardened Layer 19
Table 17 Surface hardness 20
Table 18 Change of outer diameter Δd1 20 after thermal stability test
Table 19 Machining Surface Roughness 21
Table 20 Coating Surface Roughness 21
Table 21 Material Defects 23
Table 22 Surface Defects 24
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"
drafting.
This document is Part 1 of GB/T 25361 "Piston Pins of Internal Combustion Engines". GB/T 25361 has issued the following parts.
--- Part 1.Technical requirements;
--- Part 2.Inspection rules.
This document replaces GB/T 25361.1-2010 "Piston Pins of Internal Combustion Engines Part 1.Technical Requirements", and GB/T 25361.1-
Compared with.2010, except for structural adjustment and editorial changes, the main technical changes are as follows.
--- Changed the scope (see Chapter 1, Chapter 1 of the.2010 edition);
--- Added the terms and definitions of the leading angle of the end face of the outer edge (see 3.2.2.3);
---Changed the symbols such as end face diameter d6, end face groove depth h1, end face step height/depth h2, taper hole inscribed table k, etc. (see Table 1,
Table 1 of the.2010 edition);
--- Increased the partial view W of the end face groove and end face step of the cylindrical piston pin (see Figure 2);
---Changed the outer edge and inner chamfer structure (see 5.2, 4.2 of the.2010 edition);
---Changed the code and description (see Table 2, Table 2 of the.2010 edition);
--- Increased the allowable waviness requirements of the outer circular surface (see Table 5);
--- Changed the inner diameter tolerance and the concentricity requirements when the wall thickness is a (see Table 6, Table 5 of the.2010 edition);
--- Changed the length tolerance and runout requirements (see Table 7, Table 6 of the.2010 edition);
--- Added the end face groove and end face step of the code LB piston pin (see Table 8);
--- Changed the size of the rounded outer edge (see Table 9, Table 7 of the.2010 edition);
--- Changed the view of the tapered hole structure (see Figure 16, Figure 13 of the.2010 edition);
--- Changed the machining surface roughness requirements (see 10.1.1, 9.1.1 of the.2010 edition);
--- Added coating surface roughness requirements (see 10.1.2);
--- Changed the requirements for material defects (see 11.2, 10.2 of the.2010 edition);
--- Changed the requirements for surface defects (see 11.3, 10.3 of the.2010 edition).
This document is equivalent to ISO 18669-1.2021 "Piston pins for internal combustion engines - Part 1.Technical requirements".
The following editorial changes were made to this document.
--- In Chapter 4, the table identification (Table 1), the title and the mention of the table are supplemented, and the order of the serial numbers of the original Table 1 to Table 21 is adjusted to
Table 2~Table 22.
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Machinery Industry Federation.
This document is under the jurisdiction of the National Internal Combustion Engine Standardization Technical Committee (SAC/TC177).
This document was drafted by. Kunming Yunnei Power Co., Ltd., Zhuzhou Xianghuohu Machinery Manufacturing Co., Ltd., Anqing Yade Dibo
Piston Co., Ltd., Shandong Yunnei Power Co., Ltd., Shanghai Internal Combustion Engine Research Institute Co., Ltd., Shanghai Motor Vehicle Testing and Certification Technology Co., Ltd.
Technology Research Center Co., Ltd., Commercial Vehicle Technology Center of SAIC Motor Corporation Limited, Shijiazhuang King Kong Kaiyuan Power Technology Co., Ltd.
Division, Anhui Jinqinglong Machinery Manufacturing Co., Ltd., Yangzhou Guanghui Auto Parts Co., Ltd., Binzhou Bohai Piston Co., Ltd., Zhejiang Huiyu Auto
Auto Parts Co., Ltd.
The main drafters of this document. Zhang Haifeng, Chen Liqiong, Li Huihai, Hu Xiande, Wang Hailiang, Qiao Liangliang, Wang Jianrui, Wang Ruihua, Huang Weilou,
Yao Guocheng, Xu Wei, Xu Liyu, Ji Weibin, Zhang Yufeng, Zuo Yanshang, Du Xuekun, Liu Shiying, Wang Yankai, Li Yuhui.
This document was first published in.2010, and this is the first revision.
Introduction
GB/T 25361 aims to establish the basic and general technical specifications for piston pins of internal combustion engines and the corresponding inspection rules.
Consists of two parts.
--- Part 1.Technical requirements. The purpose is to establish general techniques such as terms and definitions, classifications, and structural features applicable to piston pins
Require.
--- Part 2.Inspection rules. The purpose is to establish the measurement conditions and characteristic measurement rules applicable to piston pins.
Piston pins for internal combustion engines - Part 1.Technical requirements
1 Scope
This document specifies the basic dimensions of piston pins with a nominal outer diameter of 8 mm to 100 mm for road vehicles and other reciprocating internal combustion engines
inch features. In some applications other than road vehicles, this document may be used with appropriate modifications upon agreement between the manufacturer and the customer.
In addition, this document establishes nomenclature, classification of piston pin types and material descriptions in terms of mechanical properties, common characteristics and quality requirements.
Application of this document may require a mutually agreed data agreement between the manufacturer and customer.
2 Normative references
This document has no normative references.
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 General
3.1.1
Piston pin piston pin
A precision cylindrical part with a smooth, hard outer surface for connecting pistons and connecting rods.
3.2 Piston pin geometry and manufacturing features
3.2.1 Pin hole type
3.2.1.1
Cylindrical bore
A pin with a straight cylindrical bore.
3.2.1.2
Central skin type centreweb
Central skin type pin hole
There are symmetrical cold-extruded inner holes at both ends of the pin, and a continuous skin is left in the center of the pin.
NOTE. The split skin is subsequently removed, leaving a step, see Figure 3.
3.2.1.3
Tapered hole type taperedbore
Both ends of the pin have conical inner holes to reduce the weight of the piston pin.
3.2.1.4
Machined machinedbore
The inner hole of the pin is manufactured separately by machining.
3.2.1.5
Seamless cold drawn steel tube type seamlessdrawntube
Hollow steel products that do not contain any technical seams.
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