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http://dx.doi.org/10.7839/ksfc.2017.14.4.001

Analysis of the Influence of the Design Factors and Modeling for the 8inch Class Down-the-Hole Hammer  

Lee, Chung No (Construction Mechinery Engineering, Kunsan University)
Hong, Ki Chang (Construction Mechinery Engineering, Kunsan University)
Jeong, Heon Sul (Construction Mechinery Engineering, Kunsan University)
Publication Information
Journal of Drive and Control / v.14, no.4, 2017 , pp. 1-8 More about this Journal
Abstract
The Down-the-Hole hammer is one of the pneumatic drill equipment used for grinding, drilling, and mining. One the advantages of which is that a reduction work efficiency at deep site are relatively small compared to other drilling methods. Due to the large vibration in the underground area, it is difficult to measure the performance of the hammer, and hammer testing requires substantial production cost and operating expenses so research on the development of the hammer is insufficient. Therefore, this study has developed a dynamic simulation model that apprehends the operating principles of an 8-inch DTH hammer and calculates performance data such as performance impact force, piston speed, and BPM. By using the simulation model, design factors related to strike force and BPM were selected, and the influence of each design factors on performance was analyzed through ANOVA analysis. As a result, be the most important for BPM and the strike force are position of upper port that push the piston in the direction of the bit and in BPM, the size of the empty space between the bits and the piston is the second most important design factor.
Keywords
Down-the-Hole hammer; Pneumatic hammer; Rock Drill; BPM; Strike force; ANalysis Of VAriance;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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