The new test bench boasts the latest hydraulic and electronic control technology. Atlas Copco is now able to perform manual and full sequence testing on its complete range of rock drills from a recipe driven database. A certificate to verify the quality of the rebuild is then issued automatically.
“We supplied the power pack using two hydraulic pumps on the test bench, one for percussion and one for rotation. Constant pressure control eliminates pressure shocks to a great extent, and the close-loop speed and torque control allows brake energy to be recouped to drive the test unit, which translates into a power saving,” explains Maurice Bloemendal, technical manager, Hytec. It also allows for a stepless control of impact resistance, simulating real load, precise speed control that mimics real working conditions and compares the output to see if the rock drill performs to all specifications. The power pack has monitoring equipment ensuring that the cleanliness, temperatures, pressures and flows of the oil are maintained.
All sensors, flow meters, pressure transducers, temperature and speed sensors, as well as impact and frequency sensing, were supplied by Hytec and Tectra Automation. The Bosch Rexroth operator interface is a VSP40.3 15” colour touch screen with embedded Windows and four VCP02.2 auxiliary displays, while the master PLC is a L20.1 with ProfiBus which controls a remote panel for the hydraulics.
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