How to achieve mirror grinding with grinding wheel
March 13, 2020
How to achieve mirror grinding with grinding wheel
Achieving mirror polishing effect is not difficult, mainly using high-precision resin bond diamond grinding wheel.
Requirement of machines for mirror polishing:
High precision, rigidity and vibration reduction measures; the rotation precision of the resin grinding wheel spindle is higher than 1mm;
The amplitude of the grinding wheel frame relative to the table is less than 1 mm; the lateral feeding mechanism can accurately finely move;
Case study:
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Mirror
Grinding parameters |
speed of the grinding wheel |
15 ~ 20m/s |
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Work piece speed |
≤50 ~ 100mm/min |
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Feed rate |
3 ~ 5mm |
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cooling |
Water and oil |
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Horizontal feed depth of 3 ~ 5mm, then make no feed grinding 20 ~ 30 times. |
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Dressing parameters |
Dressing tools |
Single crystal diamond point dress tools |
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Dressing speed |
6 ~ 10mm/min |
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horizontal feeding |
2 ~ 4 times |
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cutting depth |
2 ~ 3mm each time |
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Each time the depth of cut is 2 to 3 mm, and no feed light is repaired once. |
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When mirror polishing, first use the vitrified bond diamond grinding wheel with grit 60# or less, make the grinding grains on the surface of the grinding wheel form many semi-blunt micro edges of equal height, when grinding only cut off the micro chip and the surface roughness reaches Ra0.08 ~ 0.04mm.
Then use resin bond grinding wheel grit W14 ~ W5 after fine dressing, for mirror polishing under proper grinding pressure. After a certain time of friction polishing, finally reach surface roughness ≤Ra 0.01mm.