石英预制棒深孔加工测力夹具设计及实验研究

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Design and experimental study of force measuring fixture for deep hole machining of quartz prefabricated rods

SUN Xiaohuan，WANG Feng，CHI Guangwei，GONG Hu* （College of Precision Instrument and Optoelectronic Engineering， Tianjin University， Tianjin ，China） * Corresponding author，E-mail： gonghu@tju. edu. cn

Abstract： An online measurement system for the deep hole machining force of quartz prefabricated rods has been designed and implemented，addressing the unique characteristics of the rods' mounting structure and the critical relationship between cutting force and tool wear. Leveraging the driling processdominated by axial force，a double-guide design was employed to isolate thetilting moment and other directional forces，enabling low-cost，real-time cuting force measurement through a unidirectional piezoelectric force sensor. To validate the system's efectiveness，multiple experiments were conducted on quartz prefabricated rods using tools exhibiting varying degrees of wear，and the correlation between cutting force and tool wear progression was analyzed.Experimental results on Panda bias-preserving fiber prefabricated rods indicate that the core is susceptible to fracture when machined with a 12.8mm diameter tool at cutting forces approaching 150N Key words： deep hole processing；quartz prefabricated rod; cutting force； online measurement

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