Application guidelines
Tool and cutter grinding is a very wide field with a large spectrum of different machine tools that vary greatly in spindle power output and overall system rigidity. Broadly speaking, one can distinguish between two major processes: reciprocating grinding for resharpening and creepfeed grinding for producing cutting tools from solid blanks. Creepfeed processes demand, among other things, very rigid machine tools and a high level of spindle drive power. Particularly in mass production processes of cutting tools, creepfeed has become the dominant process for the grinding of flutes (chip grooves). The basics of creepfeed grinding are discussed on pages 28 to 32 in the chapter on surface and creepfeed grinding.
The following recommendations are to be taken as a guideline only.
|
Resharpening (reciprocating grinding)
| Grit size FEPA (mm) |
Grit size mesh |
Table speed vw |
Depth of cut ae per strokein mm |
| 126 - 151 |
125/106 - 150/125 |
0.5 to 3 m/min |
0.01 to 0.03 mm |
| 76 to 91 |
200/230 - 170/200 |
0.5 to 3 m/min |
0.008 to 0.02 mm |
| 46 to 64 |
325/400 - 270/325 |
0.5 to 2 m/min |
0.005 to 0.008 mm | |
Creepfeed grinding
| Grit size FEPA (mm) |
Grit size mesh |
Table speed vw |
Depth of cut ae per strokein mm |
| 126 - 151 |
125/106 - 150/125 |
50 to 300 mm/min |
0.5 to 3 mm |
| 76 to 91 |
200/230 - 170/200 |
50 to 200 mm/min |
0.5 to 2 mm | |
Surface speed Vc
|
Choice of superabrasives |
Reciprocating grinding |
Creepfeed grinding |
|
CBN wheels for high speed
& tool steel (HSS)
Diamond wheels for
tungsten carbide |
35 to 40 (63) m/s
7,000 to 8,000 (13,000) sfpm
20 to 28 m/s
4,000 to 5,600 sfpm |
20 to 28 m/s
4,000 to 5,600 sfpm
18 to 24 m/s
3,600 to 4,800 sfpm | | |
