Principle of hardness sorting:

 Due to the different effects of hardness value, material variety, depth of hardening layer, heat treatment state, and defects in components (such as cracks, pores, inclusions, etc.) of magnetic materials on the magnetic field, there exists a certain corresponding relationship. When the tested workpiece is in contact with a uniformly distributed probe magnetic field, the magnetic field inside the probe changes, and an excitation current is generated in the probe coil, which is transmitted to the instrument through a wire. After being analyzed and processed by the central circuit of the instrument, the quality status of the tested workpiece can be automatically judged and displayed on the display screen through computer software processing. It is precisely through the changes in electromagnetic effects caused by the magnetic flux of the tested workpiece that electrical signals are generated. After amplification and conversion, they are processed by computer software to achieve the detection of defects such as material composition, hardness, surface hardening depth, cracks, and mixing.

Technical parameters:

Hardness testing sensitivity: Rockwell: ± 2HRC; Vickers: ± 40Hv. Error range: Effective sorting of different materials

2、 Next is the non-metallic material machinery manufacturing industry

With the development and trend of high-tech imported eddy current flaw detectors, more and more new materials are being used in production processes, such as porcelain, plastic, and polyethylene. Nowadays, some rolling bearings are produced and processed using unique structural ceramics, while valve accessories are also produced and processed using polyethylene raw materials. This type of raw material is hard and sturdy, and some applications can replace metal composite materials to make product workpieces. Its surface roughness must also be inspected during the production and manufacturing process.

3、 Other industries

With the strong strengthening and improvement of the technical and functional aspects of roughness meters, as well as their deep marketing promotion and application, more and more fields have been found to require roughness inspection. In addition to mechanical processing and manufacturing, the production and processing of aluminum tube eddy current flaw detectors in power engineering, communication, electronic devices, such as network switches, integrated circuit chips, and semiconductor materials also require roughness identification, Even stationery, kitchenware, and human teeth used in daily life must undergo surface roughness testing.