Sandvik Mining and Construction Oy

Sandvik Tamrock Oy

Roger Noël

A method for controlling rock drilling and a rock drilling arrangement having at least one feed channel of a feed actuator provided with a restrictor, which causes a pressure drop if the penetration rate increases and, consequently, a flow through the restrictor increases. A pressure difference and an increase in the penetration rate can be detected by sensing the pressure before the restrictor and after the restrictor. When the feed rate increases, a hydraulic system is arranged to decrease percussion pressure.

Arrangement for controlling rock drilling

The invention relates to a method for controlling at least two hydraulic actuators, to a monitoring valve and a rock drilling apparatus. The monitoring valve () is connected to the input channel of a first actuator through a sensing channel () and controls a load-sense circuit (') of a second actuator. The pressure of the load-sense circuit (&#x2032;) is set by a force of a spring element () and biased by a control element () of the monitoring valve with differential pressure sensing.

Monitoring valve, rock drilling apparatus and a method for controlling at least two hydraulic actuators to such a monitoring valve and rock drilling apparatus

Growing community of inventors

Bron, France

Roger Noël