Sandvik Mining and Construction Oy

Jarno Viitaniemi

Martti Leskinen

Timo Kela

Vesa Peltonen

Ilkka Lahdelma

Mikko Hamalainen

Tommi Kiviniemi

Miika Huikkola

Pertti Parkkinen

Markus Saarela

Juho Seppälä

Mikko Hämäläinen

Ville Kohola

Perttu Koivumaki

Juho SEPPÄLÄ

Juho Seppaelae

Perttu KOIVUMÄKI

An arrangement and method for heating an impact device of a rock treating machine (Rtm) in low-temperature operating conditions is provided. The arrangement includes a warm-up mode (WM) for feeding pre-heated hydraulic fluid through a feed channel to a hydraulic circuit of the impact device. One or more hydraulic accumulators are provided in the hydraulic circuit. The feed channel is provided with a control element for limiting the feeding of the pre-heated hydraulic fluid during the warm-up mode. The control element limits the feeding of the pre-heated hydraulic fluid in the feed channel so that separating elements of the pressure accumulators do not move.

Arrangement and method for heating hydraulic impact device

An apparatus, rock drilling rig and method for rock drilling includes a turning device for moving a drilling tool around longitudinal axis of the tool. The turning movement is controlled by an alternating turning system so that direction of turning movement is continuously reversed to first and second turning directions. The turning angle of the tool is restricted and a safety system (is configured to monitor the operation and to ensure that a predetermined turning angle is not exceeded.

Apparatus, rock drilling rig and method for rock drilling

Method and apparatus for controlling rock drilling with a percussion device belonging to a rock drill to deliver stress waves to rock through a tool by pushing the tool against the rock by means of a feed motor and rotating simultaneously the tool by means of a rotation motor, whereby the maximum feed force is determined, pressure medium is supplied to the feed motor and to the rotation motor and the feed force is controlled according to the drilling conditions. The feed force is controlled on the basis of the feed speed and the rotation torque. The apparatus has a load control valve which controls the feed.

Method and apparatus for controlling rock drilling

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Tampere, Finland

Jarno Viitaniemi