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How to achieve mirror grinding with grinding wheel

March 13, 2020
How to achieve mirror grinding with grinding wheel
 
diamond 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;
 
diamond grinding wheel
Case study:
 

 

 

Mirror

Grinding parameters

speed of the grinding wheel

15 ~ 20m/s

Work piece speed

50 ~ 100mm/min

Feed rate

3 ~ 5mm

cooling

Water and oil

Horizontal feed depth of 3 ~ 5mm, then make no feed grinding 20 ~ 30 times.

Dressing parameters

Dressing tools

Single crystal diamond point dress tools

Dressing speed

6 ~ 10mm/min

horizontal feeding

2 ~ 4 times

cutting depth

2 ~ 3mm each time

Each time the depth of cut is 2 to 3 mm, and no feed light is repaired once.

 
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.
 
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