11.5 Chapter Conclusion
Tim A. Bacon
Summary
Precision grinding is a specialized manufacturing process that produces parts with both a high degree of accuracy and surface finish. In precision grinding, the objective is to achieve the desired shape, size, and finish of the part by removing material with an abrasive wheel.
The basic principle of precision graining is the interaction between the grinding wheel, and the workpiece. The grinding wheel is made of abrasive particles bonded together. It has a high Revolutions Per Minute (RPM) when in use. The work is held securely on a table below the wheel and oscillates back and forth to provide full surface coverage of the work area.
A benefit of precision grinding is being able to achieve extremely high tolerances. This process allows manufacturers to attain precise dimensions that are critical for the fit and function of the assemblies. Precision grinding is typically the only means of achieving accuracy at this level.
Review Questions
- What type of grinder would be used to grind a 123 block?
- Horizontal grinders are typically used to finish what types of parts?
- Vertical grinders are typically used to finish what types of parts?
- Cylindrical grinders are typically used to finish what types of parts?
- What are three basic shapes of surface grinder wheels?
- Explain why it is important to know the material used to make a grinding wheel.
- What is the general term for the material?
- Describe two ways to hold parts on a surface grinder.
- What is the purpose of performing a ring test on a grinding wheel?
- What can happen if a wheel is not dressed?
- Why should you always approach the grinding wheel with the workpiece from the outgoing nip side when starting to grind?