Cutting angler and cutting linear velocity affected to cutting performances of pick-shaped cutter

In order to deeply study the cutting angle and cutting linear velocity affected to the cutting performances of the pick-shaped cutter, a PFC3 Ddiscrete ele ment sofware was applied to establish the pick-shaped cutter and coal wall model. A cutting depth was fixed as 10 mm and the cutting distance was 20 mm. A straight-I ine cutting simulation was conducted with the different cutting angle and cutting linear velocity. An analysis was conducted on the micro damage within the coal wall, cut ter load and the specific energy consumption of the cutting. The results showed the higher cutting linear velocity, the more obvious cutting damage would be to the coal seam and the cutting angle would be affected to the micro damage degree of the coal wall and the cracking expansion direction. With the cutting linear velocity increase d, the average value of the cutting resistance and the specific energy consumption of the cutting would be in a tendency with a reduction first and a increasing late. Wh en the cutting angle was 40, the average value of the cutting resistance would be high obviously, but the specific energy consumption of the cutting would be low and would be closed to 50°. When the cutting angle was 55°, the average value of the cutting resistance would be low, but the specific energy consumption of the cutting Wo uld be high obviously and the cutting efficiency would be low. In a comprehensive consideration, the cutting linear velocity should be 3 ~ 4 m/s and the cutting angle sh ould be 45° ~ 50° possibly.