The invention provides a method for preparing a ultrahard small
grinding head. The method comprises the following steps that prefabricating forming is carried out, specifically, a ultrahard
grinding material, a
ceramic bond, a pore-forming agent, a
whisker,
polyvinyl alcohol and
water area mixed and stirred into a gel
sizing agent firstly, and then the gel
sizing agent is poured to a
gypsum mold for standing so as to obtain a small
grinding head prefabricated
green body; high-temperature
sintering is carried out, and specifically,
sintering treatment is carried out on the small grinding head prefabricated
green body at 100-700 DEG C and under normal pressure so as to prepare and obtain a small grinding head sintered
green body; and a finished product is
cut, specifically, the small grinding head sintered green body is
cut into the small grinding head semi-finished product with a predetermined size by using a
laser, and a small grinding head
handle connecting hole is
cut on the small grinding head semi-finished product. The ultrahard small grinding head is manufactured through the above method, and therefore, according to the method for preparing the ultrahard small grinding head, the ultrahard small grinding head manufactured through the above method has the advantages that the grinding
material distribution is uniform, the size is controllable, the operation is simple, and theultrahard small grinding head is suitable for precise trimming of an ultrahard tool in the manufacturing process.