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Method for calibrating Rockwell hardness tester

A technology of Rockwell hardness tester and pure copper, which is applied in the direction of testing material hardness, etc., can solve the problems of low accuracy and complicated calibration method of Rockwell hardness tester, and achieve the effect of high accuracy, accurate calibration and simple operation.

Inactive Publication Date: 2017-11-24
安吉元融仪器仪表检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under specified conditions, in order to determine the relationship between the quantity value indicated by the measuring instrument or measuring system, or the quantity value represented by the physical measuring instrument or reference material, and the corresponding quantity value reproduced by the standard, currently The calibration methods for Rockwell hardness testers are more complicated, and the accuracy is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for calibrating a Rockwell hardness tester, comprising the following steps: (1) selecting a cylindrical pure copper test block, and polishing the upper and lower surfaces of the pure copper until smooth and flat; (2) cleaning the top surface of the lead screw and the workbench (3) Place the workbench on the screw table; (4) Place the pure copper test block on the workbench horizontally, rotate the handwheel to make the workbench rise slowly and squeeze the indenter until the indicator in the plate Stop applying force to the handwheel after the small pointer points to the red dot; (5) Rotate the indicator shell so that the large pointer in the indicator plate coincides with the long engraved line between C and B; (6) Pull the loading handle to apply the main test Force, the large pointer of the indicator rotates counterclockwise. When the pointer stops, the unloading handle can be pushed back to remove the main test force; (7) Read from the corresponding scale on...

Embodiment 2

[0022] A method for calibrating a Rockwell hardness tester, comprising the following steps: (1) selecting a cylindrical pure copper test block, and polishing the upper and lower surfaces of the pure copper until smooth and flat; (2) cleaning the top surface of the lead screw and the workbench (3) Place the workbench on the screw table; (4) Place the pure copper test block on the workbench horizontally, rotate the handwheel to make the workbench rise slowly and squeeze the indenter until the indicator in the plate Stop applying force to the handwheel after the small pointer points to the red dot; (5) Rotate the indicator shell so that the large pointer in the indicator plate coincides with the long engraved line between C and B; (6) Pull the loading handle to apply the main test Force, the large pointer of the indicator rotates counterclockwise. When the pointer stops, the unloading handle can be pushed back to remove the main test force; (7) Read from the corresponding scale on...

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Abstract

The invention discloses a method for calibrating a Rockwell hardness tester. The method comprises the following steps: (1) taking a cylindrical pure copper test block, and grinding the upper and lower surfaces of pure copper to smoothness and flatness; (2) cleaning the top surface of a screw rod and the upper and lower end surfaces of a workbench; (3) putting the workbench on a screw rod table; (4) putting the pure copper test block horizontally on the workbench, rotating a hand wheel, so that the workbench slowly rises and extrudes a pressure head, and stopping applying force to the hand wheel when a small pointer in an indicator panel points at a red point. According to the method disclosed by the invention, the pure copper test block is prepared, the hardness values of multiple measurement points on the pure copper test block are measured by the Rockwell hardness tester, and the average value of the hardness values is calculated; the average value is compared with a standard hardness value of the pure copper to obtain an indication error; during calculating the average value, the measurement error is effectively avoided by removing the maximum value and the minimum value, thus the calibration is more accurate; the method disclosed by the invention is easy to operate and has high precision.

Description

technical field [0001] The invention belongs to the technical field of instrument calibration, in particular to a method for calibrating a Rockwell hardness tester. Background technique [0002] Calibration refers to checking machines, instruments, etc. to make them accurate. Under specified conditions, in order to determine the relationship between the quantity value indicated by the measuring instrument or measuring system, or the quantity value represented by the physical measuring instrument or reference material, and the corresponding quantity value reproduced by the standard, currently Calibration methods for Rockwell hardness testers are more complicated, and the accuracy is not high. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the invention provides a method for calibrating a Rockwell hardness tester with simple operation and high precision. [0004] In order to achieve the above object, the present invention adopts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/44
CPCG01N3/44
Inventor 张明
Owner 安吉元融仪器仪表检测有限公司
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