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Original Research

STUDY ON THERMAL PERFORMANCE OF GRANITE COMPOSITE FOR MACHINE TOOL STRUCTURES

HO-CHIAO CHUANG 1, and CHIH-RONG CHEN 2.

Vol 17, No 11 ( 2022 )   |  DOI: 10.5281/zenodo.7341617   |   Author Affiliation: Graduate Institute of Manufacturing Technology, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 10608 Taiwan 1,2.   |   Licensing: CC 4.0   |   Pg no: 1063-1073   |   To cite: HO-CHIAO CHUANG, and CHIH-RONG CHEN. (2022). STUDY ON THERMAL PERFORMANCE OF GRANITE COMPOSITE FOR MACHINE TOOL STRUCTURES. 17(11), 1063–1073. https://doi.org/10.5281/zenodo.7341617   |   Published on: 21-11-2022

Abstract

The structural support is a component that plays an extremely important role in the performance of the machine tool, as it must withstand the force and heat and suppress vibration to secure positioning without interfering with the function. The raw materials used in precision equipment must also have high rigidity, low density, high damping and high heat dissipation for maximum performance. Thus, in this study, Jinan black granite was used as aggregate, high-strength epoxy resin as adhesive and segmented carbon fiber as reinforcing material. The granites were crushed to a size less than 3.5mm to be used as the primary aggregate. High-strength epoxy resin would be used to glue the materials together. The entire compound was then reinforced by segmented carbon fibers. By mixing, stirring and casting, we obtained a test sample of size 100mm x100mm x 100mm. The test results showed that the maximum bending stress could reach 53Mpa. Its damping ratio was 6.5 times that of cast iron. The thermal conductivity coefficient was 1.2W/m.K and the thermal expansion coefficient was 1.4E-05 m/m.K, in which these physical properties have all demonstrated the material as a better choice than cast iron. The experimental results also showed that compared with cast iron, it could absorb vibration better and exhibited better properties in thermal conductivity and damping ratio, which showed it as a good reference for ultra-precision machining.


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