A coal and rock cutting pick

Details A coal and rock cutting pick A coal and rock cutting pick

E - Fixed Constructions

21

C

E21C 35/18 (2006.01) E21C 35/19 (2006.01)

Patent

CA 2415198

The pick (1) includes a radially inner end (4) and a shank (3) to be fixed to the drum (10) to substantially prevent relative movement between the pick (1) and drum (10). The pick (1) further includes a cutting head (2) having leading (5) and trailing faces (6) intersecting to provide a cutting edge (8) to extend generally parallel to an axis. The leading face (5) in use is inclined by an acute rake angle R to a radius of the axis, with the trailing face 6 being inclined at an acute back clearance angle B to a plane passing through the edge (8) and normal to the radius. The leading face (5) and trailing face (6) being inclined by an acute angle and the shanks when fixed to the drum (10) extends at an acute angle to the radius.

Pic (1) possédant une extrémité intérieure radiale (4) et une tige (3) conçue pour être fixée à un tambour (10), de manière à empêcher un déplacement relatif entre le pic (1) et le tambour (10). Ce pic (1) comprend, de plus, une tête coupante (2) présentant des faces avant (5) et arrière (6) venant en intersection réciproque afin de constituer un bord coupant (8) s'étendant parallèlement à un axe. La face avant (5) est inclinée en utilisation selon un angle de coupe aigu R par rapport à un rayon de l'axe, la face arrière (6) selon un angle aigu B formant un jeu arrière par rapport à un plan traversant le bord (8) et perpendiculaire au rayon. La face avant (5) et la face arrière (6) sont inclinées selon un angle aigu et les tiges, quand elles sont fixées au tambour (10), s'étendent selon un angle aigu par rapport au rayon.

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