Question
Download Solution PDFWhy surface plates are used for marking?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- A surface plate is used to test the flatness of other surfaces or to provide a truly flat datum surface in marking off work for machining.
- The flat surface provides stability.
- It is also used for the inspection of gauges, jigs, and fixtures.
- Surface plates are generally made of good quality cast iron which is stress-relieved to prevent distortion.
- In order to retain its flatness, a surface pate must be treated with extreme care:
- Always clean a surface plate with a soft dry cloth before use and cover it after use.
- Slide heavy objects onto a surface plate rather than lowering them
- Never hammer anything on a surface plate.
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