The Philosophy of grinding
oelheld offers grinding oils from low-end to high-end solutions on PAO-basis.
Why coolgrind?
- Production time reduced up to 55 %
- Life time of the grinding wheels increased up to 45 %
- Grinding wheel edge-radius retention improved up to 30 %
- Temperature of the work piece reduced up to 42 %
- Working temperature reduced up to 40 %
- Surface quality improved up to astonishing 30 %
- Cleaner machines
In our brochure you will find all information about coolgrind grinding wheels.
Shape | Diameter [mm] | Thickness | Rim height [mm] | Angle |
|---|---|---|---|---|
1A1 | 100 | 12 | 5 | |
1A1 | 100 | 15 | 5 | |
1A1 | 125 | 12 | 5 | |
1A1 | 125 | 15 | 5 | |
1A1 | 125 | 20 | 5 | |
1V1 | 100 | 12 | 5 | 10 |
1V1 | 100 | 15 | 5 | 10 |
1V1 | 100 | 12 | 5 | 30 |
1V1 | 100 | 15 | 5 | 30 |
1V1 | 100 | 12 | 5 | 45 |
1V1 | 100 | 15 | 5 | 45 |
1V1 | 125 | 12 | 5 | 10 |
1V1 | 125 | 15 | 5 | 10 |
1V1 | 125 | 12 | 5 | 30 |
1V1 | 125 | 15 | 5 | 30 |
1V1 | 125 | 12 | 5 | 45 |
1V1 | 125 | 15 | 5 | 45 |
11V9 | 100 | 10 | 2 | |
11V9 | 100 | 10 | 3 | |
11V9 | 125 | 10 | 2 | |
11V9 | 125 | 10 | 3 | |
11V9 | 150 | 10 | 2 | |
11V9 | 150 | 10 | 3 |
Other shapes, grit sizes, rims (e.g. for HSS) and bore diameters upon request.
The following characteristics are the same for all grinding wheels:
- Bore diameter is 20 mm
- The concentration (C) is 100
- The binder is metal-hybrid and the safety data is 50 M/ S
coolgrind philosophie:
- The right grinding fluid,
- the right amount
- in the right spot.
Modellreihen
1A1
1V1
11V9
The coolgrind System is composed, functionally and constructively of two parts:
- 1. The grinding-wheel
- 2. The grinding-wheel cover.
The grinding-wheel cover (2) is optional, but the best results will be obtained in conjunction with this part.
In order to attain the coolgrind effect – the right place and the correct amount of lubricating-cooling fluid must be applied; The grinding wheel itself is constructed of two parts:
- 1a. The abrasive layer
- 1b. The side-cover.
These two parts are functionally and constructively matched and are delivered as one unit.
System solution
Combined grinding system
Modified machine wheel-cover
Cover
Guilding-rail
Surface finish / work piece
When grinding with conventional grinding wheels higher thermal stress is caused and subsequently the abrasive layer can lead to unsatisfactory results at the flute and the cutting edge.
With coolgrind and its internal coolant supply the surface finish and the chipping of the cutting edge are improved substantially.
The best results were achieved in the combination of coolgrind grinding wheels together with the grinding fluid SintoGrind from oelheld.
Thermographic photograph of the grinding wheel
Conventional grinding wheels
coolgrind grinding wheel
Comparison of conventional grinding-wheel with coolgrind 1A1 wheel:
Temperature distribution in grinding-wheel (Thermo-photographs taken with Jena 3021 ST camera.)
Thermographic photograph of the grinding wheel
Conventional grinding wheels
coolgrind grinding wheel
Comparison of conventional grinding-wheel with coolgrind 1A1 wheel:
Temperature distribution in work-piece (Thermo-photographs taken with Jena 3021 ST camera.)
Application example
Production of a large diameter solid carbide end mill
3-flute, 30 °, right hand
Diameter: 20 mm (0.7878 inches)
Total length: 104 mm (4.0944 inches)
Cutting length: 38 mm (1.4960 inches)
Material: TSM 33 Ceratizit
Machine tool: Walter Helitronic Power Production, 24 KW spindle power
Grinding fluid: SintoGrind (oelheld)
Pump capacity: 120 l/ min @ 6 – 20 bar (32 US gal/ Min. at 90-290psi)
Operation | Type of wheel | Passes | Vc | Vf | ae | Q'w |
|---|---|---|---|---|---|---|
Flute grinding and back clearance |
|
|
|
|
|
|
2. relief angle diameter | 11V9 100-10-2-20 | 1 | 28 | 200 | - | - |
1. relief angle diameter | 11V9 100-10-2-20 | 1 | 30 | 200 | - | - |
End gashing | 1V1 125-15-V=45° | 1 | 18 | 100 | - | - |
2. relief angle | 11V9 100-10-2-20 | 1 | 28 | 200 | - | - |
1. relief angle | 11V9 100-10-2-20 | 1 | 30 | 200 | - | - |
1. end relief chamfering | 11V9 100-10-2-20 | 1 | 30 | 250 | - | - |
