Portable Hardness Tester

Gutt, Sonia; Gutt, Gheorghe; Severin, Traian-Lucian; Mironeasa, Silvia; Oroian, Mircea

doi:10.2507/22nd.daaam.proceedings.342

Cited by 3 publications

(1 citation statement)

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“…Chutes' material and particle hardness were determined using a portable hardness tester [20]. First, the surfaces of each test piece were polished using the grinding polishing method to remove any oxide layer present and hence, ensure a flat surface.…”

Section: Hardness Of Materials and Particlesmentioning

confidence: 99%

Wear and flow rate problems on chutes in a rock crushing plant

Gopaul¹,

Venkannah²,

Dauhoo³

2022

tribomat

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Rock crushing plants cannot afford unforeseen breakdowns with the current boom in the construction sector. This paper discusses measures that can be used to predict wear on chutes in the plant so that predictive maintenance can be implemented. Some of the chutes used to transfer the materials are difficult to access. Failures of the chutes cause downtimes, which are untimely and costly. The objective of this research is to determine the wear rates of chutes. A chute system was designed, modelled and validated using the Solidworks® software and then imported into the EDEM® software to predict the failure of the chutes. Factors affecting the abrasion wear of the metal were determined and used as input parameters to perform a simulation on EDEM® to validate the wear recorded. The service life obtained for mild steel S275 was 731 hours and that of abrasion resistant steel Hardox® 400 was 1490 hours, and it was deduced that the difference in the value of hardness of the metals to that of the rocks they carry significantly affects the wear of the chutes. The software was also used to replicate the flow of boulders on chutes and an accelerated flow rate of 496 tons per hour (t/h) was achieved at an angle of elevation of 24.4°.

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Section: Hardness Of Materials and Particlesmentioning

confidence: 99%

Wear and flow rate problems on chutes in a rock crushing plant

Gopaul¹,

Venkannah²,

Dauhoo³

2022

tribomat

View full text Add to dashboard Cite

show abstract

Biocompatible anti-aging face mask prepared with curcumin and natural rubber with antioxidant properties

Silva

Orlandi

Fernandes

et al. 2023

International Journal of Biological Macromolecules

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Hardness determination by a semi-automatic testing system

Jain,

Shinde,

Panchikattil

et al. 2024

Innov. Emerg. Technol.

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The hardness testing is vital for metals for testing and production quality control. Hardness testing is a fine indicator to determine the mechanical characteristics of metals. The various types of hardness testing methods include Rockwell, Vicker, Brinell, and Knoop testing methods. The most prevalent manual method to determine hardness is indentation using dead weight technology. However, the said technology is quite ancient and it has its own limitations, like the kinetic effect applying excessive load at actual, man-to-man variations, variation over the period due to deterioration and friction effects of moving parts like lever, weight block hanger, etc. increases the uncertainty of this method and eventually demands for upgradation of the technology. Further, the methods currently in use are open-loop and manually operated testers. The main drawback of all these testers is that they provide zero feedback, and so the obtained result needs to be compared to the desired result. To overcome the above-stated problem, the paper presents some novel modifications for measuring hardness using existing methods of Rockwell, Vicker, and Brinell testing. Toward this objective, the paper proposes to modify existing testers and develop a semiautomatic hardness testing system. Firstly, for Rockwell testing, the work aims to design a closed-loop system for hardness testing. The proposed system comprises of Arduino as an open microcontroller, a load cell along with servo motor, and its driver to establish the desired closed loop. The need of obtaining a more accurate result, free from human interference gives rise to a closed-loop system for hardness testing. The key aspect of the closed-loop system lies in retaining the basic structure of the metal. Unlike traditional hardness tester, during testing, the weight increases gradually, due to which the basic structure of metal is not deformed. Secondly, the paper proposes a computational methodology that would estimate the Vickers and Brinell hardness value. The proposed system comprises of a camera for gathering hardness indentation images, thereby automating the system. Further, these images are analyzed based on image processing software, and the indentation depth is obtained. The proposed work thus replaces human intervention to calculate the hardness of the material. The results obtained based on the proposed systems provide a proof of concept to address the problems of traditional Rockwell, Vicker, and Brinell testing.

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Portable Hardness Tester

Cited by 3 publications

References 0 publications

Wear and flow rate problems on chutes in a rock crushing plant

Wear and flow rate problems on chutes in a rock crushing plant

Biocompatible anti-aging face mask prepared with curcumin and natural rubber with antioxidant properties

Hardness determination by a semi-automatic testing system

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