Indentation depth measuring device
A technology for measuring devices and indentation depths, which is applied in the direction of measuring devices, testing material hardness, instruments, etc., can solve problems such as inaccurate measurement results, and achieve the effect of improving accuracy and avoiding errors
Pending Publication Date: 2018-06-22
国能锅炉压力容器检验有限公司
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Problems solved by technology
[0005] Measuring the indentation depth h to calculate the Brinell hardness value can greatly improve the accuracy of the Brinell hardness value. The current indentation depth measurement device includes a measurement body and a base for the measurement body. However, the measurement body still uses the traditional Manual microscope reading mode, inaccurate measurement results caused by human eye recognition errors are prone to occur
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[0032] The core of the present invention is to provide an indentation depth measuring device, so as to accurately measure the depth of the indentation formed by the cemented carbide ball, thereby accurately obtaining the hardness value of the metal plate to be tested.
[0033] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0034] Please combine Figure 1 to Figure 3 , the indentation depth measuring device disclosed in the present invention includes a measuring body 1 and a base 2 for supporting the measuring body 1, and the measuring body 1 specifically includes an outer sleeve 8, a mandrel 6, a displacement sensor, a digital display component and a core Shaft drive member, one end of the mandrel 6 is equipped with a measuring ball 4, the diameter of the measuring ball 4 should be con...
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The invention relates to an indentation depth measuring device which comprises a measuring body and a base for supporting the measuring body. The measuring body comprises an outer sleeve, a core shaft, a displacement sensor, a digital display assembly and a core shaft driving component. One end of the core shaft is provided with a measuring bulb, and the other end of the core shaft is screwed in the first end of the outer sleeve. The displacement sensor is arranged in the outer sleeve and used for detecting the displacement of the core shaft in the axial direction of the outer sleeve. The digital display assembly is arranged on the outer side of the outer sleeve, connected with the displacement sensor and used for displaying the displacement of the core shaft in the axial direction of theouter sleeve. The core shaft driving component is sleeved with the second end of the outer sleeve so as to drive the core shaft to move in the axial direction of the outer sleeve. By means of the indentation depth measuring device, errors caused by artificial reading are effectively avoided, and the hardness measuring accuracy is effectively improved.
Description
technical field [0001] The invention relates to the technical field of metal hardness measurement, in particular to an indentation depth measurement device. Background technique [0002] Brinell hardness is a standard to express the hardness of materials, and it is widely used in metal detection. The Brinell hardness result is an arbitration value. According to the material standard, the material beyond the Brinell hardness range can be rejected directly. Therefore, the accuracy of the Brinell hardness result directly affects whether the material can continue to be used. [0003] The measurement of Brinell hardness is to press a cemented carbide ball of a certain diameter into the metal surface to be tested with a certain size of test load, keep it for a specified time, and then unload it. The Brinell hardness value is obtained by dividing the load by the indentation spherical surface area The quotient is represented by the formula: Among them, F is the load, D is the dia...
Claims
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IPC IPC(8): G01N3/42G01B21/18
CPCG01B21/18G01N3/42
Inventor 张广兴王强代小号郝晓军王志永杨新军郑相锋
Owner 国能锅炉压力容器检验有限公司