| 摘要 |
FIELD: measurement equipment.SUBSTANCE: device to measure resistance to drilling, comprising an electric motor for a rotation drive of a boring bit; a carriage installed on guides and driven by an electric motor of a feed drive, for instance, DC via a screw gear; limiters of displacement of the boring bit in the transverse direction. At the same time adjustment of speed of boring bit feed is carried out automatically by measurement of the current value and/or power supply voltage, and/or frequency of rotation of an electric motor shaft in a rotation drive of the boring bit, analysis and conversion of measured data, for instance, with the help of an electronic computer, development of a control signal and variation of rotation frequency of the electric motor shaft in the feed drive, for instance, with the help of a thyristor switch during impulse adjustment of supply voltage of the electric motor of the feed drive.EFFECT: higher accuracy of measurements of resistance to drilling of investigated materials with drilling, reduced wear of a cutting part of a boring bit and higher reliability of a drive, units and device design in general.4 cl, 2 dwg |
