hydroerosive grinding HE-grinding machine control orifice DI (rotary table)


The semi-automatic HE-grinding machine control orifice DI has been designed for flow calibration of diesel injection components to a defined target. Based on a rotary table concept the workpieces are processed in sequentially arranged stations of this module – HE-grinding, purging, measuring. The stations are integrated twice to work on different holes in one pass. During the grinding process an abrasive fluid is pumped through the orifices of the workpieces in order to radius bore hole intersections. The flow will be increased by 8% – 30% depending on the process. The grinding process is stopped as soon as the flow has reached the correlated target flow value. The loading and unloading of the module takes place manually. This procedure is also possible from two sides simultaneously. A moveable control panel with a comfortable user interface is installed. Running processes and results are displayed.
The parameters can be easily adjusted in case of changing requirements.


  • Quick changeable workpiece carriers
  • Separately selectable process steps
  • Modular design of the stations
  • Place saving concept of the rotary table
  • With a process capability of Cpk ≥ 1.33 the flow tolerances are reduced to ± 1,0 % after the HE-process
  • Easy data handling access via a local database (target values, results, etc.)
  • Illustrative visualization of running processes and outcomes
  • Control panel with touchscreen display and convenient user interface
  • Operation possible from two sides simultaneously
  • Ratio grinding possible (second hole is processed depending on the first hole results)

Technical data  

  • Plunger pump with 3 liters of volume for pre-pressure
  • Piston pump with 3 liters of volume for backpressure
  • Cycle time grinding process: depending on the degree of rounding
  • Grinding pre-pressure: max. 140 bar
  • Grinding back pressure: max. 75 bar
  • Grinding flow: max. 100 – 2500 ml/min
  • Washing hydraulics: max. 150 bar
  • Measuring hydraulics: max. 140 bar