Diamond D7 User Manual download pdf (Page 39)

General technical notes

Workpiece: Lens diameter 65 mm

R = 37.584 mm

Material SF57

Machine: LOH LP75

Tool: d

= 8 mm

Specification: D15A / BZ5017 / C35

Grinding layer area

= 1257 mm²

Parameter setting:

Head angle α =

7.5°-12.5°-17.5°

Oscillation angle β = +/- 5°

Main grinding force F

= 140 N

Test results

a) For precision milling of spherical surfaces

Fig. 1: Material removal rate Q

= f (workpiece speed n

, head angle α)

Fig. 2: Ave.peak-to-valley height R

= f (workpiece material and pellet specification)

Fig. 3: Ave.peak-to-valley height R

= f (pellet specification)

Shape constancy ∆ R:∆ V

= f (pellet specification)

Material removal rate Q

= f (pellet specification)

Machining time t

= f (pellet specification)

Fig. 4: Ave.peak-to-valley height R

= f (workpiece fracture behaviour, tool specification)

Fig. 5: Ave.peak-to-valley height R

= f (machining time t

, diamond grit size)

Fig. 6: Allowance z = f (machining time t

, tool specification)

Ave.peak-to-valley height R

= f (allowance z, tool specification)

Ave.peak-to-valley height R

= f (machining time t

,tool specification)

Fig. 7: Ave.peak-to-valley height R

= f (tool specification, initial surface finish R

)

Fig. 8: Shape constancy ∆ R:∆ V

= f (head angle α, workpiece speed n

)

b) For fine milling of flat surfaces

Fig. 9: Material removal rate Q

= f (process time t

)

Fig. 10: Surface finish R

= f (process time t

)

Fig. 1: Material removal rate Q

can be increased as a function of workpiece speed and head angle.

Workpiece speed n

[min

-1

]

Material removal rate Q

[mm³/s]

Test results for fine milling of optical glass with pellet

tools, acc. to IPT Fraunhofergesellschaft Aachen, Prof.

König

diamond tools

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