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A hardness-checking machine is a crucial tool in engineering studies, especially in mechanical and manufacturing processes. It is usually used to measure, calibrate, and standardize the quality of products. This study is based on the field problem in Akebono Brake Astra, Indonesia, where more manual tools are used to meet product demands. In consideration of this issue, a modified hardness checking tool with automatic operation has been developed. Using automatic operation is beneficial in terms of time and cost efficiency in comparison with other manual tools. Automatic tools apply the 3-axis system mechanism, using a Festo linear actuator with a servo motor. The testing capacity of automatic devices is equal to more manual devices. The frame of the auto checking hardness machine is assessed in this study by applying load variations. Drawing on other similar work on auto checking hardness machines, this paper provides a comparison of various aluminum frame types based on different tensile strengths and cross-sectional area values. The baseplate for hardness testing is also calculated. There are 9 testing points for calculating the use of linear guides for the baseplate. The results show excellent tensile strength values, as well as a good displacement and maximum stress.

Design development and technical analysis of an auto checking hardness machine: A study case of the hardness tester HR-522 series