1 Scope
This standard specifies the testing apparatus and method of bulk density of superabrasive.
This standard is applicable to the testing of bulk density of synthetic diamond and cubic boron nitride with a grain size of 16/18~325/400.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documents (including any amendments) applies.
GB/T 6406 Super abrasive - Grain sizes of diamond or cubic boron nitride
JB/T 3914 Superabrasive - Sampling method
3 Test conditions
3.1 Test environment
The test shall be carried out under the following atmospheric conditions:
——relative humidity: 45%~55%;
——temperature: 20~25℃.
3.2 Workbench
The workbench shall be firm and vibration-proof, and its surface shall be smooth and covered with a 5mm-thick rubber board or soft plastic board.
Foreword i
1 Scope
2 Normative references
3 Test conditions
3.1 Test environment
3.2 Workbench
4 Apparatus
4.1 Apparatus structure
4.2 Funnel
4.3 Funnel locking device
4.4 Distance from the lower end of funnel neck to the upper end of measuring cylinder
4.5 Measuring cylinder
4.6 Scraper
4.7 Balance
5 Volume calibration of measuring cylinder
5.1 Calibration period
5.2 Calibration steps
5.3 Calculation
6 Testing method
7 Data processing
7.1 Calculation
7.2 Permissible deviation
Figure 1 Schematic diagram for bulk density tester
Figure 2 Schematic diagram for scraper
Figure 3 Schematic diagram for scraping direction
