ДСТУ EN ISO 16047:2022 Крепежные изделия. Испытание крутящего момента/усилие зажима (EN ISO 16047:2005, IDT; ISO 16047:2005, IDT)

ДСТУ EN ISO 16047:2022
(EN ISO 16047:2005, IDT; ISO 16047:2005, IDT)

Кріпильні вироби. Випробування крутного моменту/зусилля затискання

 
   
 
 
     
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

Foreword

1 Scope

2 Normative references

3 Terms and definitions

4 Symbols and their designations

5 Principle of test

5.1 General

5.2 Determination of coefficients of friction

5.3 Determination of torque coefficient K (K-factor)

5.4 Determination of ratio T/F

6 Apparatus

6.1 Testing machine

6.2 Test fixture

7 Test parts

7.1 General

7.2 Test-bearing plates or test washers

7.3 Test nuts for testing bolts, screws and studs

7.4 Test bolts or test screws for testing nuts

8 Testing under standard conditions

9 Testing under specific conditions

10 Evaluation of results

10.1 Determination of torque coefficient K

10.2 Determination of coefficient of total friction μ_tot

10.3 Determination of coefficient of friction between threads μ_th

10.4 Determination of coefficient of friction between bearing surfaces μ_b

10.5 Determination of yield clamp force F_y

10.6 Determination of yield tightening torque T_y

10.7 Determination of ultimate clamp force F_u

10.8 Determination of ultimate tightening torque T_u

11 Test report

11.1 General

11.2 Description of fasteners to be tested

11.3 Description of test parts

11.4 Testing machine

11.5 Test fixture

11.6 Environmental conditions

11.7 Specific conditions

11.8 Test results

Bibliography