Originally titled 'Multi-Mode Robotic Blast System Operates in Two Modes'
Guyson Corp.’s robotic pressure-blast machine can operate in two different modes—as a seven-axis rotary table surface-preparation system or as a horizontal roller blasting system for preparing inside and outside diameter surfaces of hollow shaft components. It eliminates the need for a separate roller blast machine, the company says .
The blast cabinet features a 12-ft. track extension with a powered transfer cart on which a servomotor-driven turntable of 1,000 kg weight capacity is mounted. The table is 84” in diameter and provided with T-slots and quick-change fixture locating hardware to enable processing of a variety of parts of different shapes and sizes. When the roller drive unit is needed for grit-blasting long cylindrical parts, it can be lowered into position by overhead crane and bolted to the table in less than 30 min.
For ID surface preparation in the roller blasting mode of operation, the component is rotated at controlled and adjustable speed, while a lance with an angled pressure-blast nozzle enters the bore of the part, advanced in programmed increments by a linear ballscrew/ball nut actuator. The OD of the component can be simultaneously grit-blasted by the robotically manipulated blast nozzle.
Two blast pots, each feeding two pressure-blast nozzles, allow the operator to choose between two different blast media specified for separate surface preparation processes. The media reclamation system separates the recirculating grit by means of two vibratory screen classifiers that deliver only media of the specified size to each pressure pot. Dual media capability further extends the versatility of the multi-mode robotic blast system.
In the rotary table mode of operation, with the rollers removed and one of the interchangeable part-holding fixtures locked in place to positively locate and orient the component, the turntable is controlled as a seventh axis of coordinated robotic motion as the six-axis articulated robot arm executes the nozzle motion program. The correct blasting angle, nozzle stand-off distance and surface speed are precisely and constantly maintained throughout the surface preparation process, even as the robotic nozzle manipulator traces the contours of complex-shaped components.