The comparison method of sandblasting and shot peening roughness meter is a commonly used method in the workshop

Sandblasting and shot peening roughness testerThe measurement
1. The sandblasting and shot peening roughness meter interferometry method uses the principle of light wave interference to measure surface roughness.
2. Needle tracing is a method of measuring the Ra value of surface roughness by gently tracing a stylus directly over the surface being measured.
3. The comparison method of sandblasting and shot peening roughness meter is a commonly used method in the workshop. Compare the roughness sample of the tested surface with the naked eye or with the help of a magnifying glass or comparative microscope; You can also judge the roughness of the processed surface by touching it with your hands and feeling the movement of your nails. This method is generally used for approximate evaluation of roughness parameters with large values.
4Sandblasting and shot peening roughness testerThe light cutting method uses the 'light cutting principle' to measure surface roughness. When measuring the surface roughness of a workpiece, a sensor is placed on the surface to be measured, and the internal driving mechanism of the instrument drives the sensor to slide at a constant speed along the measured surface. The sensor senses the roughness of the measured surface through a sharp built-in stylus. At this time, the roughness of the measured surface of the workpiece causes displacement of the stylus, which changes the inductance of the sensor's inductance coil. As a result, an analog signal proportional to the roughness of the measured surface is generated at the output terminal of the phase sensitive rectifier. After amplification and level conversion, the signal enters the data acquisition system. The DSP chip performs digital filtering and parameter calculation on the collected data, and the measurement results are read out on the LCD display, output on the printer, and can also communicate with a PC.