Rockwell hardness testers often encounter curved workpieces in field operations. Different curvatures can affect the hardness test results. Under correct operation, the impact on the test piece's surface is instantaneously at the same position as that on a flat surface, thus a universal support ring is sufficient. However, when the curvature is small enough, the significant difference in the elastic state of deformation under plane conditions can cause the rebound speed of the impact body to be lower, resulting in a lower Rockwell hardness reading. Therefore, for the test pieces, it is recommended to use a smaller support ring during measurement.

Requirements for Equipment Testing Curved Workpieces:

1. General requirements for the tested pieces: The surface of the specimens should be clean, free of dust, oil stains, and oxidation scales.

2. Temperature Requirements for Sample Surface: The surface temperature of the sample must not exceed, with a requirement for temperatures below 120°C. The optimal testing temperature range is between 4°C and 38°C.

3. The Rockwell hardness tester's requirements for the surface roughness of the specimen: The surface roughness of the specimen should meet the requirements listed in the table below. The surface roughness of the specimen not only affects the accuracy of the test but also impacts the service life of the impact ball head.

Equipment Advantages:

1. The system allows for pre-set upper and lower hardness limits, with automatic alerts for values outside the range, facilitating batch testing for users.

2. Streamlined housing, compact, portable, and highly reliable, suitable for harsh operating environments with resistance to vibration, shock, and electromagnetic interference.

3. The thermosensitive printer integrates with instruments, offering quiet operation, rapid printing speed, and the capability to print test reports on-site.

4. Equipped with a high-capacity lithium-ion rechargeable battery and charging control circuit; capable of continuous operation for no less than 100 hours; features power-saving functions such as automatic sleep mode and automatic shutdown.

5. The LCD features an icon indicating remaining battery power, which displays the battery's remaining charge in real-time; it also includes a charging process indicator, allowing the operator to keep track of the charging progress at any time.

6. Features a software calibration function for indication.

7. Rationalized support structure design for ease of on-site operation and printing.

The hardness gauge can be tested before measurement using a random standard Rockwell hardness block, and its indication error and repeatability should not exceed the specifications in Table 5. Note: The values of the random hardness blocks are determined by a calibrated Rockwell hardness gauge, measuring vertically downward five times, and taking the arithmetic mean as the hardness value of the random hardness block. If this value exceeds the standard, the user calibration function can be used for calibration.