Experimental study on rotary ultrasonic vibration assisted drilling rock |
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| Authors: | Xiaogan Peng Liang Li Yinfei Yang Guolong Zhao Ting Zeng |
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| Institution: | 1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Beijing Spacecrafts. Beijing 100094, China |
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| Abstract: | Traditional rotary ultrasonic vibration drilling rock (fz < 2A) is an effective drilling rock method, but its feed rate is limited by the ultrasonic vibration amplitude, resulting in lower drilling efficiency. In this paper, based on the requirements of drilling efficiency in the asteroid sampling mission, the process method of rotary ultrasonic vibration assisted drilling rock (fz > 2A) was proposed. The mechanism of ultrasonic vibration assisted drilling rock was analyzed, and the propagation of ultrasonic energy in the process of ultrasonic vibration assisted drilling rock was analyzed. Using the small diameter cemented carbide triangular bit as the drilling tool, the comparative test of ultrasonic vibration assisted drilling and traditional drilling of sandstone, marble, and basalt was carried out. The experimental results showed that there was a specific feed rate range for each type of rock, so that the weight on bit required for ultrasonic vibration assisted drilling was less than that of traditional drilling. With the increase of firmness coefficient of sandstone, marble, and basalt, the ratio of weight on bit to feed rate was increased, and the effective feed rate range of ultrasonic vibration assisted drilling was reduced. The ultrasonic vibration assisted drilling rock (fz > 2A) was one of the alternative methods for drilling rock on the asteroid surface. |
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| Keywords: | Ultrasonic vibration assisted drilling Cemented carbide triangular bit Ultrasonic vibration energy Basalt Marble Sandstone |
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