Method for preparing diamond thin wall trepanning and punching drill bit integral drill teeth through non-pressure sintering method

The invention discloses a method for preparing diamond thin wall trepanning and punching drill bit integral drill teeth through a non-pressure sintering method. The integral drill teeth are of an annular structure and comprise work teeth connected with a base body of a drill bit and water gap blocks. The work teeth are evenly distributed along the circumference on the base body, and the water gapblocks are arranged between every two adjacent work teeth. The work teeth comprise a work layer, a transition layer and a welding layer from top to bottom in the height direction of the work teeth. The specific preparing method comprises the steps that firstly, work materials, transition materials, welding materials and water gap materials are designed and prepared; secondly, water gap block formed blanks are prepared through cold press, then the water gap block formed blanks are evenly placed in an annular cold press forming die, and the part between every two adjacent water gap formed blocksis sequentially filled wi