GB/T 12735-2014 English PDF

US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 12735-2014: Belt drives -- V-belts for the agricultural machinery -- Fatigue test
Status: Valid

GB/T 12735: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 12735-2014	189	Add to Cart	3 days	Belt drives -- V-belts for the agricultural machinery -- Fatigue test	Valid
GB/T 12735-1991	199	Add to Cart	2 days	Fatigue test method for agricultural V-belts	Obsolete

Similar standards

GB/T 13552   GB/T 12585   GB/T 10822   GB/T 12736   GB/T 12730   GB 12731   

Basic data

Standard ID: GB/T 12735-2014 (GB/T12735-2014)
Description (Translated English): Belt drives -- V-belts for the agricultural machinery -- Fatigue test
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G42
Classification of International Standard: 21.220.10
Word Count Estimation: 8,862
Date of Issue: 5/6/2014
Date of Implementation: 12/1/2014
Older Standard (superseded by this standard): GB/T 12735-1991
Quoted Standard: GB/T 10821
Regulation (derived from): National Standards Bulletin No. 9 2014
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 fatigue testing of agricultural machinery V-belt (hereinafter referred to as band) rapid test laboratory. This Standard applies to the determination of the fatigue life of the belt under specified conditions. This Standard appl

GB/T 12735-2014: Belt drives -- V-belts for the agricultural machinery -- Fatigue test

---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.
Belt drives - V-belts for the agricultural machinery - Fatigue test ICS 21.220.10 G42 National Standards of People's Republic of China Replace GB/T 12735-1991 V-belt for belt drive agricultural machinery stress test Released on.2014-05-06 2014-12-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Issued by China National Standardization Administration

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 12735-1991 "V-belt Fatigue Test Method for Agricultural Machinery", compared with GB/T 12735-1991, except The main technical changes besides editorial changes are as follows. ---Modified the test pulley size in Table 1, the outer diameter of HL type V belt 216.47mm was changed to 216.41mm; HA type V belt The distance of measuring ball or rod 90.36mm is modified to 90.63mm; the diameter of measuring ball or rod of HB type V belt is 14.228mm Modified to 14.288mm (see 4.1, 3.2.1 of the.1991 edition); ---Modified the test parameters in Table 2, the total belt tension of HD type V belt 1191N is changed to 1911N; the total belt tension of HK type V belt The tension is modified from 1156N to 1680N (see 6.2, 5.2 of the.1991 edition); ---Modified the test pulley requirements, the surface hardness of the rim part HRC45~48 is modified to (217~255)HBW, the table on both sides of the wheel groove The roughness Ra of the surface structure is less than 0.8μm and modified to not more than 3.2μm (see 4.2 and 4.3, 3.2.2 and 3.2.3 of the.1991 edition); ---Added table 1, table 2, table 3 table notes (see 4.1, 6.2 and 6.3). This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard is under the jurisdiction of the Friction Belt Transmission Subcommittee (SAC/TC428/SC3) of the National Belt Wheel and Belt Standardization Technical Committee. Drafting organizations of this standard. Maanshan Ruisheng Industry and Trade Co., Ltd., Wuxi Zhonghui Rubber Technology Co., Ltd., Jiamusihuier Co., Ltd. Company, Zhejiang Kaiou Transmission Belt Co., Ltd., Zhejiang Zijingang Belt Co., Ltd., Qingdao Product Quality Inspection Technology Research Institute. The main drafters of this standard. Zhu Liusheng, Liu Zhigang, Zhu Shusheng, Wang Honggang, Jie Deli, Pang Changzhi, Wu Guiqing, Wang Ping. The previous versions of the standard replaced by this standard are as follows. ---GB/T 12735-1991. V-belt for belt drive agricultural machinery stress test

1 Scope

This standard specifies the fatigue test method for rapid inspection of V-belts for agricultural machinery (hereinafter referred to as belts) in laboratories. This standard applies to the determination of the fatigue life of belts under specified conditions. This standard applies to ordinary V-belts for agricultural machinery, variable-speed V-belts for agricultural machinery, and hexagonal belts for agricultural machinery.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 10821 V-belt and V-ribbed belt size for agricultural machinery

3 devices

3.1 The fatigue testing machine (see Figure 1) is a two-wheel testing machine. Including motor, driving wheel, driven wheel and dynamometer driven by the tested belt, Tensioning device and necessary instruments. 3.2 If an internal combustion engine is used instead of an electric motor, a flywheel large enough to eliminate the impact should be installed. 3.3 The driving wheel or driven wheel of the testing machine is installed on the slide and can be moved horizontally to make the belt bear constant tension. 3.4 The size of all fittings should be accurate enough, and the rotating parts should be assembled in suitable bearings to minimize friction.

7 Test procedure

7.1 Install the belt on the pulley, apply the specified tension on the tension pulley, start the testing machine to reach the specified speed, and let the test device Run for 5min±15s under specified conditions (excluding start-up and braking time). 7.2 Turn off the testing machine. When the belt stops rotating, measure the center distance between the two pulleys, and this center distance is used as the initial center distance. Measure the outer circumference as The initial outer circumference. 7.3 Continue the start-up test under the specified conditions. 7.4 Stop the machine for inspection every 24h, and measure the center distance and outer circumference. 7.5 When the test is broken or terminated when the slip rate is greater than 10%, the center distance and outer circumference are measured at the same time. The sliding rate is calculated according to formula (1). 7.6 Record the time from the start of the test to the end of the test (except for downtime).

8 Calculation and evaluation of test results

8.1 Calculation 8.1.1 The effective elongation is calculated according to formula (2). 8.1.3 Calculate the difference between δa and δb. This value reflects the degree of side wear of the belt and the degree of belt sinking into the wheel groove. 8.2 Evaluation The fatigue life of the belt is expressed in terms of the operating time (hours) at the end.

9 Test report

The test report shall at least include the following. a) The section and specification of the sample; b) The temperature during the test; c) Test operation time; d) Effective elongation and outer circumference change rate; e) The reason for the termination of the test; f) Test evaluation; g) Tester, review and approval; h) Test unit; i) Test time; j) The testing unit or personnel and date. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 12735-2014_English be delivered?

Answer: Upon your order, we will start to translate GB/T 12735-2014_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 12735-2014_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 12735-2014_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 12735-2014?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 12735-2014 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.