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EDM HEG Gas Needle

The automatic HE grinding module is used for the flow calibration of injection components. Based on a rotary table concept, the workpieces pass through various processes in successive stations: Pre-measuring – HE grinding- Blowout – Flushing – Final measuring – Blowout. During the HE grinding process, an abrasive fluid is pumped under high pressure through the workpiece bores to round off. Depending on the application, the flow rate is increased by 8 % - 30 %. The grinding process is stopped as soon as the correlated desired flow value has been reached.
The loading and unloading of the module is carried out automatically by a 4-axis robot which grips the workpieces from pallets and inserts them into the rotary table.
For safe pallet detection, the DMC code is read in on the pallets by means of a DMC camera and the dot code on the workpieces is also read in by means of a camera for part detection and for seamless data traceability. The module has a swiveling control panel with a comfortable user interface. Processes and their results are clearly visualized. In the case of modified processing and test requirements, a quick adjustment of the parameters is easily possible.


Rotary table for HE grinding of valve seat

The fully automated HE-grinding module is used for the flow calibration of fuel injection components. Based on a round table concept  the workpieces pass through the individual processes. At the HE-grinding process an abrasive fluid is pumped under high pressure through the workpiece holes to round them. The flow increases, depending on the application, from 10% to 35%.The grinding process is stopped as soon as the correlated target flow has been reached.

• DMC station: The robot takes the component above the camera to read the data matrix code of the component (serial number).
• Loading round table: Transfer point from robot to round table an vice versa.
• Pre-measuring station: Here, the flow quality of the preliminary process is checked (within the specified flow tolerance).
• Grinding station 1: Rounding process of the component (can be used for pregrinding but also for final grinding).
• Washing station 1: Cleaning process after grinding.
• Grinding station 2: Rounding process used as final grinding to the target flow.
• Washing station 2: Cleaning process after grinding.
• Measuring station 2: