Material cutting and grinding device

A material cutting and grinding device, comprising:

• a shaft;
• a rotor assembly disposed on an end of the shaft and including:
• a housing including a holding groove;
• a rotor accommodated in the holding groove and sleeved outside the shaft;
• an air intake opening and an air outtake opening respectively disposed at different positions of the housing, and respectively connected to the holding groove;
• a plurality of accommodating grooves penetrating along a radial direction of the rotor;
• a plurality of blades respectively penetrating in the accommodating grooves, and one end of each of the blades protruding outside the rotor;
• a cutting grinding sheet connected to the other end of the shaft;
• a fixture sleeved on the shaft and used for clamping the cutting grinding sheet;
• and
• a channel set including a shaft channel and at least one gas channel, wherein the shaft channel penetrates through the shaft, the at least one gas channel is provided on the fixture, and the at least one gas channel is connected to the shaft channel;
• wherein, a gas enters the holding groove from the air intake opening and pushes the blades to drive the rotor and the shaft to rotate, thereby driving the cutting grinding sheet and the fixture to rotate, and the gas flows from the shaft channel to the at least one gas channel and then flows to the surface of the cutting grinding sheet.