Application of walnut shell pore-forming material in pore grinding wheel with ceramic bond

In the past, to adjust the size of the pores and the amount of pores formed in the ceramic bond grinding wheel, wood powder or naphthalene grains were added to the grinding wheel to achieve the purpose of forming pores.

  Wood powder can only be added in a small amount in the grinding wheel, which plays the role of micro-pores, and can do nothing for large pores and high porosity. And the amount of wood powder added is large, there will be a large elastic deformation of the blank during molding, that is, the size measured when pressure is applied is inconsistent with the size of each part after pressure relief and demolding, so the hardness and strength of the product are greatly affected, and different The hardness reproducibility of batches of grinding wheels is poor and it is not easy to control.

  Naphthalene grains have a long history as a pore-forming material for ceramic bond grinding wheels. Adding naphthalene grains to ceramic grinding wheels has a porosity and pore size that can meet the requirements of formula design, which is already a mature technology. However, naphthalene particles are highly toxic. If workers operate in the environment of naphthalene particles for a long time, it will directly affect their health. Therefore, the state has explicitly banned the production, sale and use. However, due to the use of ceramic grinding wheels, especially for deep-cut slow-feed grinding and grinding with large metal removal, large pore grinding wheels must be used to meet the grinding requirements. Therefore, a new suitable for ceramic bond grinding wheels should be researched as soon as possible. The pore-forming material is imminent.

  A walnut shell pore-forming material that can replace naphthalene grains as the pore-forming material of the ceramic bond grinding wheel. The walnut shell pore-forming material has the characteristics of a new type of environmental protection, non-toxic and harmless, and easy to use and promote.