ZKMD-3584 Superhard Abrasive Bulk Density Tester

Model of Superhard Material Bulk Density Tester: ZKMD-3584 Standard: JB/T3584-1999 "Determination Method for Bulk Density of Superhard Abrasives" American National Standard ANSIB74.17-1976 "Inspection Method for Bulk Density of Diamond Abrasives"

Superhard material bulk density tester

Model: ZKMD-3584

standard

JB/T3584-1999 "Determination Method for Bulk Density of Superhard Abrasives"

American National Standard ANSI B74.17-1976 "Test Method for Bulk Density of Diamond Abrasive Grains".

Purpose:

Suitable for measuring the bulk density of artificial diamond and cubic boron nitride with superhard abrasives ranging from 16/20 to 325/400. It is also suitable for detecting the bulk density of other similar granular materials. This standard specifies the measuring instruments and methods for determining the bulk density of superhard abrasives.

Working Principle:

Load the superhard material abrasive particles to be tested into a funnel, quickly open the rubber ball, and the abrasive particles naturally fall into the measuring cylinder along the lower end of the funnel. Scrape the abrasive particles that flow into the measuring cylinder flat, weigh the mass of abrasive particles in the measuring cylinder after scraping on a balance, and divide it by the volume of the measuring cylinder to measure the bulk density of the abrasive particles to be tested.

Main technical parameters:

Funnel material: brass

Inner diameter of funnel top: 57.1mm ± 0.01mm

Conical height: 41.3mm

Funnel angle: 63 °± 10 ° Inner diameter: 6.4mm ± 0.03mm Length: 6.4mm ± 0.03mm

Funnel locking device: Use a rubber ball with a diameter of 19mm and fix it at the outlet of the funnel neck with two springs

Measuring cylinder: made of brass with an inner diameter of 19.3mm ± 0.01mm. Capacity meter: 10ml ± 0.2cm3

install

1. The instrument should be installed on a stable workbench.

2. A 5mm thick rubber sheet should be laid on the workbench.

3. Adjust the three horizontal adjustment screws on the chassis to make it level.

4. Avoid severe vibration after instrument installation.

Calibration of measuring cylinder volume:

1. The calibration method shall be carried out in accordance with the provisions of JB/T3584-1999.

2. The calibration cycle should generally not exceed 1 year.

3. Requirements for measurement environmental conditions: relative humidity: 45%~55%, ambient temperature: 20~240C

Test steps:

1. Take the sample to be tested according to the standard method, reduce it to 25 ± 0.1g, and place it in a nickel crucible with a volume of about 30cm3. Dry it in an oven at 110 ± 50C for 1 hour.

2. Remove the test sample from the oven and cool it to room temperature in a dryer. Store it for at least 4 hours to adapt to the laboratory atmosphere and eliminate static electricity.

test process

1. Carefully clean the funnel of the instrument, close the rubber ball valve at the discharge port, clean the measuring cylinder and aggregate tray, and place them on the positioning pin.

2. Pour the prepared sample into a glass feeder. When adding materials, first follow the wall of the funnel, then move to the center, and slowly flow into the funnel without leaving the material pile, so that it spreads evenly from the center to the surroundings and naturally accumulates into a cone shape.

3. Quickly open the rubber valve to allow the sample to fall freely and fill the measuring cylinder. Gently hold the measuring cylinder with your left hand, and immediately use the edge of the scraper plate with your right hand to tightly adhere to the edge of the measuring cylinder mouth, scraping off excess samples at an angle of 5-100. When scraping materials, the operation should be careful from beginning to end, avoiding vibration, impact, or other interfering factors. Then gently tap the measuring cylinder wall to reduce the sample volume, and use a "brush" to remove scattered particles on the outside and bottom of the measuring cylinder.

4. Weigh the mass M1 of the sample in the measuring cylinder on a balance, accurate to 0.001g.

5. Repeat the operation process specified in sections 5.3.1 to 5.3.4 twice to obtain measurement results M2 and M3.

6. Calculate the arithmetic mean M of the three measurement results.

7. The bulk density of the tested sample is calculated according to the following formula: D=M/V

In the formula: D - the bulk density of the tested sample, unit: g/cm3;

M - arithmetic mean of the mass of the sample in the measuring cylinder, unit: g;

V - measuring cylinder volume, unit: cm3.

Allowable deviation: For samples with particle sizes ranging from 16/20 to 325/400, the difference between the three measured bulk density values and the minimum value should not exceed 0.015g/cm3.