Method for adjusting drilling of drilling machine and rock...

Details Method for adjusting drilling of drilling machine and rock... Method for adjusting drilling of drilling machine and rock...

B - Operations, Transporting

25

D

B25D 9/26 (2006.01) B25D 9/14 (2006.01)

Patent

CA 2234448

A method for adjusting percussion pressure and a drilling machine. In the method the percussion power of a drilling machine is adjusted by moving a shank (2) in the longitudinal direction of the drilling machine forwards when a smaller percussion power is to be transferred from the percussion piston to the shank (2). The drilling machine comprises at least two groups of pistons (4a, 4b) moving in the axial direction of the drilling machine the pistons being connected to act on the shank (2) by means of a pressure medium acting behind the pistons towards the front end of the drilling machine. The drilling machine comprises at least two separate groups of pistons (4a, 4b) whose travel with respect to one another is different and where pressure medium channels (7a, 7b) separate from one another lead to the cylinder spaces of both piston groups.

L'invention se rapporte au réglage de la pression de percussion et d'une machine de forage. Selon ce procédé, la puissance de percussion d'une machine de forage se règle par le déplacement vers l'avant d'une tige (2) dans le sens longitudinal de la machine de forage lorsqu'une puissance de percussion plus faible doit être transférée du piston à percussion à la tige (2). La machine de forage comprend au moins deux groupes de pistons (4a, 4b) se déplaçant dans le sens axial de la machine de forage, les pistons étant raccordés de manière à agir sur la tige (2) à l'aide d'un milieu de pression agissant derrière les pistons en direction de l'extrémité avant de la machine de forage. La machine de forage comprend au moins deux groupes séparés de pistons (4a, 4b) dont le déplacement des uns par rapport aux autres est différent et où les canaux (7a, 7b) du milieu de pression se séparent l'un de l'autre pour aboutir aux espaces cylindriques des deux groupes de pistons.

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