Ion. mal bits were employed to measure drill vibrations for higher
Ion. mal bits were utilized to measure drill vibrations for higher effect pressure and misdirection.Figure two. carbide drill bits made use of for drilling: (a) normal bit, (b) chipped button bit (defective), (c) Figure two. Tungsten Tungsten carbide drill bits used for drilling: (a) standard bit, (b) chipped button bit (defec- worn-out tive), bit (abrasion). (c) worn-out bit (abrasion).three.2. 3.2. Data AcquisitionData AcquisitionAn accelerationAn acceleration sensor on the guide cell thethe rock drill thedetect vi- to detect vibrasensor was mounted was mounted on of guide cell of to rock drill tion signals within the longitudinal was mounted such that the preferred measbration signals in the longitudinal path. Itdirection. It was mounted such that the preferred measuring uring path path coincided with its main sensitivity axis. The sensor could detect the vibration coincided with its primary sensitivity axis. The sensor could detect the vibrabehavior bit, because the vibrations in the in the bit propagated through tion behavior of your drillof the drill bit, because the vibrations bit propagated by way of the drill the drill string to of body on the drill The outline and schematic diagram of your experistring for the physique thethe drill machine. machine. The outline and schematic diagram from the experiment are shown in Figure was performed on a granite a granite rock and drill ment are shown in Figure 3. Drilling3. Drilling was performed onrock and drill vibrationsvibrations had been had been measured.measured. The drilling circumstances are Table 1:in Table 1: normal, abrasion, abrasion, high The drilling conditions are shown in shown standard, defective, defective, impactand misdirection. 10 holes were holes wereeach condition, in total high influence pressure, stress, and misdirection. 10 drilled for drilled for every single situation, in total 50 holes The drilled. The length of 1 drill hole was roughly 1 m. The 50 holes have been drilled.were length of 1 drill hole was around 1 m. The amount of number of hits per minute wasfor all 3120 for all holes. Table two illustrates the data acquisition parameters hits per minute was set at 3120 set at holes. Table 2 illustrates the information acquisition paramused for the experiment. The effect stress for every hole 13.5-7 MPa. eters used for the experiment. The influence pressure for every hole was set at was set at 13.5-7 MPa. The striking the quantity number of revolutions, drilling speed speed had been The striking frequency,frequency, theof revolutions, and also the along with the drillingwere deter- Tasisulam Apoptosis determined by the striking stress, the rotating pressure, as well as the feed stress. The rotation stress mined by the striking stress, the rotating stress, and also the feed stress. The rotation was 4and the feed pressure was 4was four MPa. The sampling frequencyset set at 50 kHz. stress was 4 MPa MPa and also the feed stress MPa. The sampling AAPK-25 Apoptosis frequency was was The accelerometer (TEAC’s piezoelectric acceleration transducer 600 was at 50 kHz. The accelerometer (TEAC’s piezoelectric acceleration transducer 600 series)series) was a charge capacity form that measured time acceleration within the longitudinal path. a charge capacity type that measured time acceleration in the longitudinal path. The The maximum two acceleration applied by sensor was 0,000 m/s The acceleration sensor outmaximum acceleration applied by the the sensor was 0,000 m/s . The acceleration sensor output a voltage that was then transmitted for the information logger (GRAPHTEC Data Platform put a voltag.
