What role do bubble alumina play in grinding wheels?
Bubble alumina are used to create holes in grinding wheels to actively and precisely introduce a controllable porosity structure inside the wheel, fundamentally improving its heat dissipation, chip removal, and grinding performance. This is particularly suitable for precision, heavy-duty grinding operations where high machining quality and efficiency are required.
Why is “pore formation” so important?
Grinding wheels are not solid structures; the appropriate amount of pores inside is crucial. They primarily serve the following functions:
Cooling and heat dissipation: During grinding, pores effectively carry coolant into the grinding zone, carrying away a significant amount of heat and preventing burns to the workpiece and grinding wheel.
Chip containment and removal:They provide storage space for the fine chips generated during grinding and help them escape, preventing wheel clogging and maintaining sharpness.
Improved self-sharpening: They help dull abrasive grains detach promptly, allowing new, sharp abrasive grains to engage in the work, maintaining stable grinding efficiency.
Vibration absorption:They help reduce vibration during the grinding process, improving the surface finish.
