B - Operations – Transporting – 25 – D
Patent
B - Operations, Transporting
25
D
B25D 9/26 (2006.01) E21B 1/00 (2006.01)
Patent
CA 2571658
The invention relates to a method and software product for controlling a percussion device belonging to a rock-drilling machine, and to a percussion device. The impact frequency of the percussion device (7) is set so that the percussion device (7) forms a new compression stress wave (p) to the tool (8) always when reflected waves (h) from the previous compression stress waves reach a first end (8a) of the tool. This requires that the impact frequency be set proportional to the propagation time of the stress wave, whereby the length of the used tool (8) and the propagation velocity of the stress wave in the tool material are to be noted.
L'invention concerne un procédé et un produit logiciel de commande d'un dispositif de percussion appartenant à une perforatrice de roches, et un dispositif de percussion. La fréquence des impacts du dispositif de percussion (7) est déterminée de manière que le dispositif de percussion (7) forme une nouvelle onde de contrainte de compression (p) sur l'outil (8) lorsque les ondes réfléchies (h) par les ondes de contrainte de compression atteignent une première extrémité (8a) de l'outil. Pour ce faire, la fréquence des impacts doit être proportionnelle au temps de propagation de l'onde de contrainte, la longueur de l'outil (8) utilisé et la vitesse de propagation de celle-ci dans le matériau formant l'outil devant être notées.
Ahola Erkki
Esko Mauri
Helin Aimo
Keskiniva Markku
Maeki Jorma
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Sandvik Mining And Construction Oy
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