kylmähiominen

Kylmähiominen, also known as cold grinding or dry grinding, is a machining process used to remove material from a workpiece using an abrasive wheel. The term "kylmähiominen" specifically refers to a method where no cooling lubricant is applied during the grinding process. This lack of coolant is a defining characteristic, distinguishing it from wet grinding.

The process relies on the friction and abrasive action of the grinding wheel against the material. High speeds and pressures are typically employed, which can generate significant heat. Without coolant, this heat is dissipated into the workpiece and the grinding wheel. This can lead to several outcomes. For some materials, such as certain steels, controlled dry grinding can be beneficial for achieving specific surface finishes or hardness levels without the risk of introducing hydrogen embrittlement, which can occur with wet grinding of some alloys.

However, kylmähiominen also presents challenges. The absence of coolant can lead to increased tool wear on the grinding wheel and potential thermal damage to the workpiece, such as surface hardening or microcracking, if not carefully controlled. Dust and debris generated during the process must also be effectively managed through dust collection systems to ensure operator safety and a clean working environment. Despite these considerations, kylmähiominen remains a practical and cost-effective method for certain applications where the benefits outweigh the drawbacks, particularly when dealing with materials or requirements that are sensitive to coolants.