GB/T 9138-2015Rebound test hammer (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

This standard replaces GB/T 9138-1988 "Hammer." The main technical differences between standard compared with GB/T 9138-1988 as follows.

--- Hammer modified terms and definitions;

--- Hammer modified classification;

--- Delete the original standard impact energy is 29.430J Hammer specifications and requirements (the original standard of Table 1 and 5.2.4);

--- Nominal increase energy 9.800J, 5.500J, 4.500J Hammer and 0.196J four kinds of specifications and requirements;

--- Increased digital Hammer requirements;

--- Increasing the quality hammer shells, shells hit extension spring stiffness requirements;

--- Remove the products and services promise (formerly standard 5.8);

--- Remove the product's three quality grades (original standard Table 2);

--- Hammer no longer on the mechanical requirements (the original standard 6.1 to 6.3) high temperature, low temperature and impact test;

--- Increase the informative appendix "Hammer impact energy test methods" (see Appendix A).

1 Scope

This standard specifies the terms and definitions Hammer, classification, symbols and marks, requirements, test methods, inspection rules, marking, packaging and Storage.

This standard applies to nominal energy 9.800J, 5.500J, 4.500J, 2.207J, 0.735J and 0.196J six hammer.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 1239.1 Cold coiled helical springs - Technical specifications - Part 1: Tension springs

GB/T 6587 General specification for electronic measuring instruments

3 Terms and Definitions

The following terms and definitions apply to this document.

3.7 With a rebound value scale digital display and memory function Hammer, and both data processing, printing, and data transfer from the instrument