Electrical Discharge Machining - EDM

Stephole drilling of GDI valve seats for the automotive industry

The main challenge of stephole micro-machining of GDI valve seats in the automotive industry is achieving precise, accurate and complex small holes while ensuring durability under high-pressure combustion conditions.

Stephole of GDI valve seat drilling application overview

Our expert team navigates these challenges, ensuring optimal performance in every micro-machining application we deliver.

Step- and sprayhole drilling results and achievements

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Precision we can achieve

The precision of micromachining operations allows your GDI valve seat step and sprayholes with diameters from 80 μm to 1.6 mm. Specialization in drilling tapered holes or reverse tapers up to 100 μm/mm, while keeping an aspect-ratio up to12. Advanced techniques deliver burr-free results, free from material deposits and micro-cracks, and achieve ultra-smooth roughness standards: Ra < 0.3 μm; Rz < 1 μm. Precision in micromachining operations remains paramount.

You currently have a GDI valve seat step- or sprayhole milling project and you would like to know more about what we could achieve together?

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Electrical Discharge Machining - EDM technology to perform these results

The process is based on the electro-erosion principle. Material is removed from the workpiece by a series of rapidly recurring current discharges between electrode and anode, separated by a dielectric liquid and subject to an electric voltage. One of the electrodes is called the tool-electrode, or simply the “electrode”, while the other is called the anode, or “workpiece.”

In order to machine high quality micro holes the Posalux EDM machines have a tilting head with deformation by pressure that allows to control the diameter and the shape of the hole, resulting in a run-out of the electrode. The electrode turns on a decentered axis, giving two different gaps, one where sparks erode the material and another, bigger one, allowing a better flushing of eroded materials. In combination with CNC driven axis and a high-speed interface to communicate with the micro EDM generator, perfect micro holes are the result.

Make it possible with the EDM HP machine

The EDM machine range micromachines parts made of conductive materials with short cycle times and high productivity.

Other applications that might be interesting for you

Electrical Discharge Machining - EDM

Drilling of GDI shim plate for the automotive industry

The complexity of designs, uniquely tailored to each engine, adds difficulty in maintaining consistency and quality throughout the shim plate milling process.
Electrical Discharge Machining - EDM

Spray hole drilling in diesel injection nozzle for the automotive industry

Advanced micromachining equipment and techniques ensure the accuracy and quality of the holes, as even small deviations in size or shape can significantly impact the performance and efficiency of the engine.

Let’s discuss your micro-machining operations

If you are looking for a high-tech production system as well as a partner to process state-of-the-art micro-machining, you are in the right place.