Abstract
After successful implementation of two hardness standardizing machines at TSE (Turkish Standards Institution) in Rockwell and Brinell-Vickers hardness scales separately and deciding to combine them in one machine with a newer design and install it in Hardness Laboratory of UME (National Metrology Institute of Republic of Turkey) it was planned to design and develop a deadweight type Brinell Hardness standard machine at UME for high load scales within the scope of an internally funded project. In this paper the design of High Load Brinell Hardness Standard Machine with dead weight force application system realized by UME Hardness Laboratory is explained.
Highlights
With the demand of the Turkish Industry and in turn accredited calibration and testing laboratories, and after successful implementation of two hardness standardizing machines at TSE in Rockwell and Brinell-Vickers hardness scales separately, a high load Brinell hardness standard machine had been decided for first time to be designed and established at UME to provide traceability in the field of Brinell hardness measurements covering the range 187.5 kgf – 3000 kgf
An indentation measurement system will be needed for diameter length measurement for Brinell hardness
The machine body was designed to be rigid and sturdy to minimize side effects during force application and realization of indentation, and every component constituting Brinell Hardness is considered to be with the highest accuracy to attain the best outcome quantity hardness
Summary
With the demand of the Turkish Industry and in turn accredited calibration and testing laboratories, and after successful implementation of two hardness standardizing machines at TSE in Rockwell and Brinell-Vickers hardness scales separately, a high load Brinell hardness standard machine had been decided for first time to be designed and established at UME to provide traceability in the field of Brinell hardness measurements covering the range 187.5 kgf – 3000 kgf In this new design the force application system was considered to comprise mass stacks realizing force under the gravitational acceleration and a frame to transfer the realized force to the tip of the indenter, a very well known deadweight force application principle. The measured diameter is used to calculate the Brinell Hardness by making use of eqn 1
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