Patent Number: 6,253,860

Title: Method and arrangement for controlling rock drilling

Abstract: A method and an arrangement for controlling rock drilling on the basis of a pressure acting in a pressure conduit of a rotation motor of a drill rod. In the method, the pressure acting in the pressure fluid conduit of the rotation motor is measured during the rotation when the drill bit does not touch the rock to be drilled, and the control is carried out thereafter on the basis of the difference between the pressure value measured during the drilling and the idle pressure value. In the arrangement, the rock drilling machine comprises a control unit that measures the pressure acting in the pressure fluid conduit of the rotation motor when the drill rod is rotated so that it does not touch the rock to be drilled and stores it in the memory and controls the rock drilling machine during the drilling on the basis of the difference between the pressure value measured during the drilling and the idle pressure.

Inventors: Poysti; Tapani (Tampere, FI), Huhdanmaki; Tapani (Tampere, FI)

Assignee: Sandvik Tamrock Oy

International Classification: E21B 44/00 (20060101); E21B 44/06 (20060101); B23Q 005/20 (); E21C 005/16 ()

Expiration Date: 07/03/2018