QB/T 2919-2018Case and bag - Test method for resistance to fatigue of pull rod (English PDF)
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Issued by
Ministry of Industry and Information Technology of PRC
Level / Type
National · Recommended
Issue date
May 8, 2018
Implementation date
September 1, 2018
Scope
QB/T 2919-2018 (Case and bag - Test method for resistance to fatigue of pull rod) is available as an English-translated PDF.
QB/T 2919-2018 — This standard specifies the principle, device, test method, test report of testing the resistance to fatigue of pull rod of case and bag. This standard applies to all kinds of pull rods used by case and bag.
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Document preview — QB/T 2919-2018
National Standard of the People's Republic of China
- ICS
- 59.140.35
Issued by: Ministry of Industry and Information Technology of PRC
Contents
- Foreword...3
- 1 Scope...4
- 2 Principles...4
- 3 Devices...4
- 4 Preparation of specimen...5
- 5 Test methods...5
- 6 Representation of results...6
- 7 Test report...7
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is a revision of QB/T 2919-2007 "Case and bag - Test method for
resistance to fatigue of pull rod".
As compared with QB/T 2919-2007, in addition to the editorial changes, the
main technical changes in this standard are as follows.
- DETAIL the "Switching device of pull rod's lock";
- ADD the requirement for the fixed position of "force value sensor";
- CHANGE the "steel ruler or steel tape measure" into "displacement control
and recording device";
- MODIFY the "test conditions";
- MODIFY the "pull-in rate";
- DETAIL the "representation of results".
This standard was proposed by the China National Light Industry Council.
This standard shall be under the jurisdiction of the National Leather Industry
Standardization Technical Committee (SAC/TC 252).
Main drafting organizations of this standard. Dongguan Hengyu Instrument Co.,
Ltd., National Leather Products Quality Supervision and Inspection Center
(Guangzhou), Yangyi Testing Technology Co., Ltd., Guangdong Xiangcheng
Box Technology Co., Ltd., Fujian Baolande Luggage & Leather Co., Ltd.
Guangzhou Institute of Quality Supervision and Inspection, China Leather and
Footwear Industry Research Institute.
1 Scope
This standard specifies the principle, device, test method, test report of testing
the resistance to fatigue of pull rod of case and bag.
This standard applies to all kinds of pull rods used by case and bag.
2 Principles
At a certain pull-out and press-fitting frequency, through continuous on/off of the
pull rod's lock as well as the reciprocating pull-out and press-fitting of the pull
rod of the case and bag, to check the reciprocating fatigue performance,
structural fastness, switch durability.
3 Devices
3.1 Reciprocating fatigue testing machine for pull rod
The reciprocating fatigue testing machine for pull rod (see Figure 1 for a
schematic diagram) shall include the components as specified in 3.1.1 ~ 3.1.8.
3.1.1 Specimen fixing device (lower clamp), which fixes the bottom of the
specimen, whose size is adjustable.
3.1.2 Pull rod's holder (upper clamp).
3.1.3 Pull rod's movement device, which can reciprocate, whose movement
frequency and stroke can be adjusted.
3.1.8 Control device, there is automatic stop function when the pull rod is stuck
or fault occurs during the test, meanwhile it has the function of setting and
automatically recording the number of pulls.
4 Preparation of specimen
The specimen shall be placed in an environment at a temperature of 16 °C ~
30 °C for not less than 2 h. The specimen shall not be loaded during the period
of storage. The specimen shall be tested at this ambient temperature.
5 Test methods
5.1 Fix the specimen on the fixing device of the reciprocating fatigue testing
machine for pull rod. If it is a finished pull rod, fix the lower part of the pull rod
directly to the fixing device of the testing machine.
5.2 After pulling the pull rod to the end, use the displacement recording device
to measure the maximum pull-out length of the pull rod, record and set the
stroke.
5.5 Select the following number of pull-in (one pull-out plus one press-fitting
forms one pull-in) to perform test. 1000 times, 2000 times, 3000 times, 5000
times, 10000 times, 20000 times, etc., or perform test according to the specified
number of pull-in. Take an interval of 5 min for each 1000 times of test.
5.6 At the end of the test, record the number of pull-in as well as the maximum
force value of pull-out and press-fitting.
5.7 Check whether the pull rod is deformed, whether the joint is loosened,
whether the switch of pull rod's lock is normal.
6 Representation of results
The results are expressed by the number of pull-in of pull rod as well as the
quality of product after the test.
7 Test report
The test report shall include the following.
QB/T 2919-2018
QB
LIGHT INDUSTRY STANDARD
ICS 59.140.35
Classification number. Y 48
Registration number. 63695-2018
Replacing QB/T 2919-2007
Case and bag - Test method for
resistance to fatigue of pull rod
Issued on. MAY 08, 2018
Implemented on. SEPTEMBER 01, 2018
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 3
1 Scope... 4
2 Principles... 4
3 Devices... 4
4 Preparation of specimen... 5
5 Test methods... 5
6 Representation of results... 6
7 Test report... 7
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is a revision of QB/T 2919-2007 "Case and bag - Test method for
resistance to fatigue of pull rod".
As compared with QB/T 2919-2007, in addition to the editorial changes, the
main technical changes in this standard are as follows.
- DETAIL the "Switching device of pull rod's lock";
- ADD the requirement for the fixed position of "force value sensor";
- CHANGE the "steel ruler or steel tape measure" into "displacement control
and recording device";
- MODIFY the "test conditions";
- MODIFY the "pull-in rate";
- DETAIL the "representation of results".
This standard was proposed by the China National Light Industry Council.
This standard shall be under the jurisdiction of the National Leather Industry
Standardization Technical Committee (SAC/TC 252).
Main drafting organizations of this standard. Dongguan Hengyu Instrument Co.,
Ltd., National Leather Products Quality Supervision and Inspection Center
(Guangzhou), Yangyi Testing Technology Co., Ltd., Guangdong Xiangcheng
Box Technology Co., Ltd., Fujian Baolande Luggage & Leather Co., Ltd.
Guangzhou Institute of Quality Supervision and Inspection, China Leather and
Footwear Industry Research Institute.
1 Scope
This standard specifies the principle, device, test method, test report of testing
the resistance to fatigue of pull rod of case and bag.
This standard applies to all kinds of pull rods used by case and bag.
2 Principles
At a certain pull-out and press-fitting frequency, through continuous on/off of the
pull rod's lock as well as the reciprocating pull-out and press-fitting of the pull
rod of the case and bag, to check the reciprocating fatigue performance,
structural fastness, switch durability.
3 Devices
3.1 Reciprocating fatigue testing machine for pull rod
The reciprocating fatigue testing machine for pull rod (see Figure 1 for a
schematic diagram) shall include the components as specified in 3.1.1 ~ 3.1.8.
3.1.1 Specimen fixing device (lower clamp), which fixes the bottom of the
specimen, whose size is adjustable.
3.1.2 Pull rod's holder (upper clamp).
3.1.3 Pull rod's movement device, which can reciprocate, whose movement
frequency and stroke can be adjusted.
3.1.8 Control device, there is automatic stop function when the pull rod is stuck
or fault occurs during the test, meanwhile it has the function of setting and
automatically recording the number of pulls.
4 Preparation of specimen
The specimen shall be placed in an environment at a temperature of 16 °C ~
30 °C for not less than 2 h. The specimen shall not be loaded during the period
of storage. The specimen shall be tested at this ambient temperature.
5 Test methods
5.1 Fix the specimen on the fixing device of the reciprocating fatigue testing
machine for pull rod. If it is a finished pull rod, fix the lower part of the pull rod
directly to the fixing device of the testing machine.
5.2 After pulling the pull rod to the end, use the displacement recording device
to measure the maximum pull-out length of the pull rod, record and set the
stroke.
5.5 Select the following number of pull-in (one pull-out plus one press-fitting
forms one pull-in) to perform test. 1000 times, 2000 times, 3000 times, 5000
times, 10000 times, 20000 times, etc., or perform test according to the specified
number of pull-in. Take an interval of 5 min for each 1000 times of test.
5.6 At the end of the test, record the number of pull-in as well as the maximum
force value of pull-out and press-fitting.
5.7 Check whether the pull rod is deformed, whether the joint is loosened,
whether the switch of pull rod's lock is normal.
6 Representation of results
The results are expressed by the number of pull-in of pull rod as well as the
quality of product after the test.
7 Test report
The test report shall include the following.
......
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.
Referenced standards
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