GB/T 26740-2011 English PDF

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GB/T 26740-2011: Road vehicles -- Brake linings -- Disc brake pads -- Evaluation of surface and material flaws after testing
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 26740-2011	154	Add to Cart	3 days	Road vehicles -- Brake linings -- Disc brake pads -- Evaluation of surface and material flaws after testing	Valid

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Basic data

Standard ID: GB/T 26740-2011 (GB/T26740-2011)
Description (Translated English): Road vehicles -- Brake linings -- Disc brake pads -- Evaluation of surface and material flaws after testing
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q69
Classification of International Standard: 43.040.40
Word Count Estimation: 8,831
Date of Issue: 2011-07-20
Date of Implementation: 2012-03-01
Adopted Standard: ISO 7629-1987, IDT
Regulation (derived from): Announcement of Newly Approved National Standards No. 10 of 2011
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the disc brake pads to withstand vehicle test or laboratory test, its surface and material defect classification, measurement tools, measurement methods and results of the evaluation. This standard applies to road vehicles with disc brake pads.

GB/T 26740-2011: Road vehicles -- Brake linings -- Disc brake pads -- Evaluation of surface and material flaws after testing

---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.
Road vehicles. Brake linings. Disc brake pads. Evaluation of surface and material flaws after testing ICS 43.040.40 Q69 National Standards of People's Republic of China Road vehicles - Brake linings disc brake pads Evaluation of surface and material defects after the test (ISO 7629. 1987, IDT) Issued on. 2011-07-20 2012-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard uses the translation method identical with the international standard ISO 7629. 1987 "Road vehicles - Brake linings disc brake pad test Evaluation of the posterior surface and material defects. " The standard proposed by China Building Materials Federation. The standard and non-metallic mineral products by the National Standardization Technical Committee (SAC/TC406) centralized. This standard was drafted. non-metallic mineral Xianyang Research and Design Institute, Shandong Kun Auto Parts Co., Limited Rizhao-Auto Parts The company, Shenzhen Institute of Standards and Technology, Dongying Xinyi Automobile Parts Co., Ltd., Shandong Rong-bang Auto Parts Co., Ltd., Fujian crown good auto parts Industry Co., Ltd., Shaanxi Development Co., Ltd. soul. The main drafters of this standard. Shi Zhigang, Zhang Haisheng, in the military factory, Ding Deshun, source, Zhang Shishao, Bao-Qi, Zhou, Chen's show, Lee soul.

Introduction

In vehicles or in the laboratory test disc brake pads will be flawed. This standard gives a method for the evaluation of these defects. Road vehicles - Brake linings disc brake pads Evaluation of surface and material defects after the test

1 Scope

This standard specifies the rear disc brake pad is subjected to laboratory tests or test vehicle defects and surface material classification, measurement tools, Measurement methods and evaluation methods of measurement results. This standard applies to road vehicles with disc brake pads.

2 defect classification

With the naked eye to determine the occurrence of defects. Defects are divided into four categories. Class Ⅰ --- crack (see Figure 1); Ⅱ class --- lack of edge (see Figure 2); Ⅲ class --- blister and the pit (see Figure 3); Ⅳ class --- material or material from peeling back within hierarchical (see Fig. 4).

3 Measuring Tools

Paper covered with a transparent coordinate measuring defects in the entire area of \u200b\u200bthe pad (see Figure 5).

4 Measurement

4.1 Initial measurements 4.1.1 Before the test measured and recorded on a pad. a) symmetrical shape pads in the pad center line of the measured height H, the asymmetric shape of the pad, measuring the maximum height value, Expressed in millimeters (see Figure 1); b) friction surface area A0 pad in square millimeters. 4.1.2 determine the height H of the midpoint of the reference point A (see FIG. 5). Measuring 4.2 defects 4.2.1 Ⅰ type defects (see Figure 1) Measuring at each crack length l. Figure 5, the graph paper is placed at point A; The number of cracks in the statistics crack densest 10mm × 10mm range, in part through the cracks also within the area of \u200b\u200bstatistics. 4.2.2 Ⅱ Class and Class Ⅲ defect (see Figures 2 and 3) The coordinates of the paper placed in the working surface of the pad is measured at each defective area with the naked eye. Note. Where available to lack of edge defects represents a × b (see Figure 2). ......

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