Operating Instructions for the Digital Brinell Hardness Tester-Shanghai Shangcai Testing Machine Co., Ltd.

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Operating Instructions for the Digital Brinell Hardness Tester

Release Date:

2023-03-06 13:10

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　　Digital Brinell Hardness Tester The test involves pressing a carbide ball of specified diameter into the surface of the material under a prescribed test force, maintaining that force for a set duration, then removing the load. The diameter of the resulting indentation on the specimen’s surface is measured to calculate the Brinell hardness.

　　The digital Brinell hardness tester is a benchtop, digitally displayed instrument designed to measure the Brinell hardness of annealed and normalized workpieces, castings, nonferrous metals, and various relatively soft components, as well as unhardened steel parts. It is suitable for use in metrology, metallurgy, the chemical industry, mechanical manufacturing, and research institutions at industrial enterprises and colleges and universities.

　　The Brinell hardness measurement range is: 8–650 HBW, using a hard-alloy ball—suitable for measuring workpieces with hardness up to 650 HBW.

　　Unique performance: The digital Brinell hardness tester employs a high-precision sensor and uses a microcontroller to automatically apply and remove the load via a stepper motor.

　　Basic configuration and structure; optional accessories include: carbide balls, various worktables, hardness blocks of different types, internal components for this instrument, a reading microscope, and assorted indenters.

　　Composition: The digital Brinell hardness tester consists of several components, including the main body, lead screw, worktable, lever, sensor, step‑motor loading/unloading mechanism, and microcomputer control system.

　　Installation: 1. Open the accessory box and insert the micrometer eyepiece into the eyepiece tube on the top of the digital Brinell hardness tester, ensuring it is fully seated. Then, connect the cable with a plug from the micrometer eyepiece to the round socket located at the upper right side of the digital Brinell hardness tester, paying attention to the correct insertion direction.

　　2. Remove the test stand (5) from the accessory box, wipe off the anti-rust oil on its surface, and then insert it into the hole of the lifting screw rod.

　　Note: The start button is only available on fully automatic models.

　　3. According to the prompts displayed on the digital Brinell hardness tester, install the φ10 mm spherical indenter: Insert the indenter into the spindle bore, ensuring it is tightly against the support surface; align the flat notch on the indenter shank with the indenter screw, and slightly tighten the screw.

　　4. On the digital Brinell hardness tester, turn the handle to position the indenter at the front. Ensure precise alignment; any misalignment along the main axis when applying force may damage the instrument. If this occurs, immediately power off the device and retract the test table; the instrument will automatically recalibrate.

　　5. Place the hardness block or test specimen on the stage of the digital Brinell hardness tester. Rotate the handwheel (3) to raise the lifting screw; when the indenter contacts the specimen, slowly continue raising the stage. At this point, the value displayed in the “Initial Force” field will change. Once the initial force reaches 90 kgf (or 20 kgf for specimens with a maximum load below 250 kgf), stop raising the stage. The instrument will emit a “beep,” and it will automatically begin applying the test force, with the display showing the applied force. When the test force reaches 1000 kgf, the dwell time starts and counts down from 10 to 0 seconds. Then, release the test force; upon completion of unloading, the instrument will sound another “beep” to indicate that the loading is finished. Finally, rotate the handwheel (3) to lower the lifting screw and remove the initial force.

A detailed explanation of the advantages of digital display Brinell hardness testers?

Low-load digital Brinell hardness tester for cast iron and steel