An industry first! Introducing an in-flight measurement device capable of visually measuring the bottom surface shape of discharge surfaces while in flight!!

➀Purpose

・We want to measure the bottom surface with high precision after EDM machining.

・We want to inspect the condition of the machined surface on the machine.

②Key Points for Implementation

[The “NK-3000” on-machine measuring machine from Kumamoto Seiken Kogyo, featuring a newly developed imaging unit based on the phase shift method]

・Enables on-machine inspection of bottom surface profiles with height variations, which previously could only be measured off-machine

・Capable of measuring height variations, irregularities, and steps on machined surfaces

③Examples

Measuring microscopic steps created by electrical discharge machining

④Results

1) High-precision measurement of height differences (in the Z-axis direction)—which was not possible with conventional image-based in-flight measurement—is now achievable.

2) The camera unit was capable of in-flight measurement of height differences ranging from 0 to 500 μm within a 6 × 4 mm field of view, with a resolution of 2.5 μm.

3) In addition to verifying the overall shape, it was possible to inspect surface irregularities in-flight.

We will be exhibiting a working model of this product at the Machine Element Technology Exhibition,to be held at Tokyo Big Sight from June 21 to 23, 2023.