The process allows to round leading edges from drillings or the burr removing from drilling intersections.
For the rounding process oil, mixed with swarf is pumped under high pressure through the components which are to be worked on. The edge rounding on the drilling which will maintain till the desired reference flow of the throttle has appeared, or the wanted rounding of the component is achieved results from the abrasive effect of this oil- swarf emulsion.
We are able to work with nozzles, control modules, valve plates and other flow pressurised components which have a flow rate from minimal 0.03 l / min to maximal 10 l / min with 100bar grinding pressure and with grinding oil on the basis of low viscous test oils to DIN 1404.
Work pieces with power density up to 25 l /min with 100bar can be worked on via highly viscous abrasive media (hydraulic oils with maximum range of viscosity 64). Just as well flow rates < 300ml/min can be adjusted using a special bubble accumulator.
A big advantage to this process is the very good cleanability after the conditioning of the work pieces from the swarf. The flow tolerances <1% can be achieved with the volume flow operated conditioning and the integrated flow measurement.
|
Machine specifications
|
| Grinding pressure: |
1…150
bar
|
| Grinding pressure stability: |
+/- 1 bar
|
| Temprature of the medium: |
298…323
K
|
| Temprature stability of the medium: |
+/- 2 K
|
| Time controlled conditioning: |
X
|
| Volume flow operated conditioning: |
0,3…10
l/min
|
| Conditioning with separate bubble accumulator: |
< 300
ml/min
|
Mass flow measuring (1) with active Bernoulli-
adjustment: |
1 - 65 kg/h
50 - 1000 kg/h
|
Max. hole diameter (2) of the components to be
worked on: |
0…2
mm
|
| Max. componet size (3) l*w*h |
ca. 150*150*200 mm
|
(1) Depending on the density of grinding medium
(2) Conditioning possibility depending on the component’s geometry
(3) Depending on the required device |
|
row of holes of a nozzle after HE-rounding (general view)
