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Automation in Construction
Published in Edward Y. Uechi, Business Automation and Its Effect on the Labor Force, 2023
The 20th century saw the development of new and improved construction machines and power tools. Combining the continuous track system described in Chapter 3, the internal combustion engine, and hydraulics, bulldozers, backhoes, excavators, and cranes were manufactured and used. Other machines included graders, loaders, and trenchers. The crane has advanced to include a telescopic boom that with hydraulics can extend the height of the crane by two, three, or more times. A stationary tower crane is also an advancement that facilitates the construction of tall buildings at great heights. Various hand tools were electrified with a motor, so that wood can be cut, carved, and smoothed at a faster rate, holes can be drilled at a faster rate, and screws can be turned and fastened at a faster rate. Examples included a circular saw, a table saw, an electric jigsaw, an automatic sander, and a power drill with interchangeable drill bits. The pneumatic nail gun is a particular innovation that allows a worker to drive several nails into wood or other material consistently, with ease, and at a faster rate.
Nonlinear dynamic modeling of pneumatic nailing devices
Published in Mathematical and Computer Modelling of Dynamical Systems, 2019
Z. Nili Ahmadabadi, Raynald Guilbault, Frédéric Laville
A series of experiments were conducted on a Bostitch N80 CB-Coil framing nailer to validate the developed model. The nail gun air pressure was set to 763.2 kPa. These tests measured the air pressures in chamber no.1 and in the return chamber from two piezoelectric pressure transducers integrated into the nail gun. The pressure transducers positions are shown in Figures 10 and 11. The transducer position and installation method were selected to avoid perturbing the flow rate and the external chamber volume. The maximum piston stroke is 121.25 mm; the chamber no.1 pressure transducer (PT-I) is placed at 50.51 mm from the stroke beginning. Figure 10 also shows the high speed camera integrated into the setup to capture the process motion (10,000 frames/sec). The measurements were repeated five times. Figure 12 presents the air pressure measurements (and ) for three of these experiments, indicating high level of repeatability.