Rockwell hardness
Principle: Use the principle of lever to make the indenter press the material or product to be tested, and determine the corresponding hardness according to the distance of the indenter. According to the maximum test force, Rockwell hardness tester can be divided into 150 series, 45 series and plastic Rockwell hardness tester. Because the test force of the 45 series is relatively small, it is also called the surface Rockwell hardness tester. The Rockwell hardness tester has a large test force, so it is usually used to detect the hardness of hardened steel, non-ferrous and ferrous metals, and relatively hard metals.
150 series Rockwell hardness testers have manual pointer hardness tester (MC010-HR-150A) electric pointer hardness tester (MC010-HR-150DT) digital display Rockwell hardness tester (MC010-HRS-150A) digital display Rockwell Surface Rockwell hardness tester (MC010-HRSS-150A). The force application device of the ordinary Rockwell hardness tester is 3 very heavy weights, which are hung in the rear case of the instrument and used as the force application weight when selecting different test hardness. The available test forces are 50Kg, 100Kg, 150Kg.
Introduction of main accessories:
Can measure HRA, HRB, HRC hardness. The standard configuration is 2 indenter diamond indenters and steel ball indenters. Diamond indenters are used when measuring HRA and HRC hardness, and steel ball indenters are used when measuring HRB hardness. The test force of the Rockwell hardness tester is relatively large, so it is suitable for measuring workpieces with high hardness.
2 working tables are attached. Standard flat table and a V-shaped table. The flat table can detect parts with regular shapes, and the V-type table can detect parts with irregular shapes.
Surface Rockwell hardness tester is divided into surface Rockwell hardness tester (MC010-HRM-45), electric surface Rockwell hardness tester (MC010-HRM-45DT), digital display surface Rockwell hardness tester (MC010-HRMS-45) 3 Models. The available test forces are HRT-15 / 30 / 45Kg and HRN-15 / 30 / 45Kg. The HRN series test force test requires the use of a steel ball indenter. The HRT series test force test requires a diamond indenter.
The accessories are basically the same as the 150 series accessories.
Note: After changing the indenter, any hardness tester should be hit once with the maximum test force, and the data will not be recorded. The purpose is to ride in equipment.
Brinell hardness tester:
The HB series currently in circulation on the market are ordinary Brinell, electronic Brinell, digital Brinell, and portal Brinell hardness testers. The maximum test force of the Brinell hardness tester can reach 3000Kg, which is suitable for workpieces with high hardness materials such as cast iron.
Brinell hardness tester accessories are relatively simple, 3 ball indenters of different diameters.
Hammer-type Brinell hardness tester. This is the simplest and most original Brinell hardness tester. Various alloys of cast iron and copper can be measured. Measuring principle: With a steel ball of a certain diameter, it sinks into the surface of the standard hardness bar and the measured workpiece after being subjected to a momentary impact load, and then obtains the indentation.
Main accessories: standard hardness rod, 15 times reading microscope, hardness comparison table, impact head device.
Vickers hardness tester:
The test force of the Vickers hardness tester is relatively large, and the test range is also very wide. Vickers hardness tester can theoretically detect other materials or workpieces that can be measured by the hardness tester. The reason is "theoretically" because he has certain requirements for measuring the roughness of the workpiece surface.
Detection principle: The Vickers hardness tester presses the surface of the workpiece through a stepping motor, and then the length of the diagonal of the indentation is measured by the reading microscope. Then use a conversion relationship between diagonal and test force to measure Vickers hardness. (If you are interested in the conversion relationship, please contact me at MSN whcyr04hotmail.com or log in to our company website http: //)
Features of the instrument itself:
The instrument itself belongs to a machine that integrates optical, electrical and mechanical functions. The non-pure mechanical measurement fully guarantees the measurement accuracy. Our company's Vickers hardness tester is a level-free equipment, which provides great convenience for actual production.
Related to the field of view of the Vickers hardness tester. That is, when measuring the length of the diagonal, some manufacturers use a 600-fold field of view. The accuracy of the measurement will be higher in theory, but in fact 400 times is more accurate than 600 times. Because the larger the magnification, the clearer the indentation, but the more glitches around, so that the inspector will have an illusion when evaluating, resulting in inaccurate results. Another point, the same object field of view, the same light source, the higher the magnification, resulting in insufficient light distribution, which also affects the measurement results.
Barcol hardness tester:
Can measure hard plastic, glass steel, aluminum alloy, etc. It belongs to pointer measuring equipment. The test results of the domestically produced MC010-HBa-1 Barcol hardness tester and the 934-1 Barbados hardness tester imported from the United States are within the allowable range of error, the difference is as much as 2 times, there is no need for a long lead time, and after-sale The service is convenient, so I recommend that you buy a domestic hardness tester.
Webster Hardness Tester:
The pliers type hardness tester, the value indicated by the pointer when the workpiece is clamped is the hardness value. Mainly measure the hardness of aluminum alloy and aluminum products. Disadvantages, can not be measured for workpieces greater than 14mm, you need to use a Barcol hardness tester.
Leeb hardness tester:
Principle: The device is very simple, a portable host, an impact head, using the momentum theorem to assess the corresponding hardness according to the return speed of the impact head after impacting the workpiece. All calculation procedures are completed by the host. Easy to carry and quick to measure. Advantages: It can detect large products that cannot be detected by the desktop computer. The hardness value can be converted to other hardnesses such as Brinell, Rockwell, Vickers, etc. by means of the software carried by itself. Disadvantages: The measurement of hollow equipment is not accurate enough.
Shore Hardness Tester:
I do n’t dare to introduce because I do n’t know much.
Shore Hardness Tester:
Also called rubber hardness tester. Divided into 3 models, the most used are MC010-LX-A and MC010-LX-D hardness testers. Differentiate and test the hardness of soft rubber and hard rubber. MC010-LX-C plastic hardness tester. The pointer type hardness tester detects the hardness of the rubber according to the depth to which the pointer is pressed. For ease of use, the hardness tester bracket is generally assembled.
For the corresponding transformation of hardness: Rockwell, Babbitt, Vickers, Leeb, Babbitt. For the specific conversion table, please visit the website forum of Shanghai Yanrun Optical Machinery Technology Co., Ltd.-Special Edition of Hardness Tester
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