Patent ID: 6938702
Filing Date: 2005-09-06
Classification: E21B

Abstract:
1. A method for controlling the operation of a rock drilling apparatus, which rock drilling apparatus comprises a percussion device, a rotating device, a feeding device, a flushing device, a tool and a bit arranged in the tool, and in which rock drilling apparatus the percussion device is arranged to produce impact energy directed to the tool, the rotating device is arranged to rotate the tool in a drill hole, the feeding device is arranged to feed the tool in the drill hole and the flushing device is arranged to supply flushing agent through the tool and the bit for flushing detached drilling waste from the hole, the method comprising setting the highest allowed feed force of the feeding device and the lowest allowed feed force of the feeding device, setting the highest allowed percussion power of the percussion device and the lowest allowed percussion power of the percussion device, setting upper and lower limits for the relation between the feed force of the feeding device and the percussion power of the percussion device, which upper and lower limits serve as limits for a targeted operating area of the relation between the feed force of the feeding device and the percussion power of the percussion device, determining the feed force of the feeding device and the percussion power of the percussion device, determining the relation between the feed force of the feeding device and the percussion power of the percussion device on the basis of the feed force of the feeding device and the percussion power of the percussion device and adjusting the feed force of the feeding device and the percussion power of the percussion device such that the relation between the feed force of the feeding device and the percussion power of the percussion device is within the targeted operating area limited by said upper and lower limits.