Arrangement for controlling percussive rock drilling

Details Arrangement for controlling percussive rock drilling Arrangement for controlling percussive rock drilling

2005-09-22

2009-10-20

Nash, Brian D (Department: 3721)

Tool driving or impacting

Processes

C173S091000, C173S104000, C173S112000

Reexamination Certificate

active

07604070

ABSTRACT:
A method and a storage device including a software product for controlling percussive rock drilling, and further a rock drilling rig to which the method is applied. The rotation resistance is monitored, the aim being to keep it below a desired reference value. To adjust the rotation resistance, successive control actions may be carried out, such as decreasing the feed force, decreasing the percussion power and stopping the feed. Control actions are started once a limit set for the control has been exceeded. At least one limit is a time limit determining the time difference between two successive control functions.

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Supplementary European Search Report dated May 21, 2008 issued in European Application No. 05789980.9.

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