Portable Leeb hardness tester Advantages: Portable, convenient, can quickly find the workpiece with a hardness tester, can achieve a variety of hardness Brinell (HB) Rockwell (HRC HRB) Vickers (HV) Shore (HS ) Richter (HL) fast measurement. There is no need to say more about the advantages! But it is not a versatile hardness tester. Because the soldiers can not use a weapon on the battlefield to eliminate the vitality of all the other equipment. This is why some laboratories have a range of hardness testers to solve the problem.
Let's take a look: overcome it to improve measurement accuracy!
Disadvantages of the portable hardness tester: (The cause of the error - the reason for the dynamic measurement: the ratio of the impact velocity has rebounded by multiplied by 1000 is the Leeb hardness, converted to other hardness values ​​by the hardness comparison table, this and static indentation measurement Different)
1 is affected by the surface roughness is relatively large; the smoother and more accurate, overcome the method: rough workpiece to be polished. See the manual impact parameters. D type head average RA1.6um
Roughness: Magnification ∫ Crest - Trough
This is because the probe will change the speed when it hits the slope;
2 is affected by the weight of the workpiece;
The heavier and more accurate the test piece is: D type head is more than 5 kg can be directly measured, 2-5 kg ​​stable support, 0.05-2 kg is coupled with butter to large Rich hardness block, which is why the Richter hardness block, It is heavier than the Rockwell block and has more materials. When the material is small, the measurement will shake and the impact speed will be attenuated. Inaccurately, if the Rockwell value, the Brinell value, and the Leeb hardness tester are measured with the Richter standard block, the Riecher block and the Brookfield machine can be used to measure the Rockwell and Brinell values. . Conversely, if a standard Rockwell block and a Brinell block are used, the error is large. If you are closely coupled to the Richter block, you can improve the accuracy, but there may be errors. See the manual impact parameters.
3 The influence of the thickness of the workpiece is relatively large; the D-type head is less than 5mm and should be densely coupled to the large workpiece. If the workpiece is too thin, the elastic deformation will change when the measurement is made. The rebound coefficient will change, and the probe impact speed is like knocking the cowhide drum, so too Thin workpieces are not measured. See the manual impact parameters.
Therefore, when we measure the workpiece, we consider the measurement accuracy of the workpiece. We must consider the above three reasons, and use the existing measurement tools flexibly to improve the accuracy. It can be measured by the desktop static indentation method. For the workpiece that is inconvenient to move on the desktop, heavy, thick, smooth and inconvenient to move, combined with the above processing method, measured with a portable Leeb hardness tester.
For some castings and thin and light workpieces, if you have ample money to purchase the accessory G-type head, the accuracy of the C-type first-class accessories is even better! You can refer to the configuration parameters of the probe on the instruction manual!
In short: the greatest advantage of the Leeb hardness tester is the large-scale heat-treated workpiece, the installed mechanical or permanent assembly parts, the mold cavity and other small test space, the rapid inspection of multiple measurement parts in a large range of large workpieces, pressure vessels , automobile generator and other equipment failure analysis, bearing and other parts production lines, material classification of large metal material warehouse. The Leeb hardness tester is a rough, fast measuring gauge for specific workpiece materials. This is the generality of the various manufacturers' Leeb hardness testers. If he is omnipotent, there will be no other types of hardness testers.
Note: Soft calibration function: The hardness tester can be turned on by pressing and holding the confirmation button in the off state, measuring 5 times on the Richter standard block, modifying the nominal value, confirming
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