Press-fit monitoring

When it makes sense

A final check alone misses a bad joint

Many press and joining steps only check the final position. In-process monitoring earns its place when:

The press or joining step runs today with no in-process check of the stroke.
A missing part, a wrong orientation or an incomplete seat must be caught immediately.
Each joint needs a stored curve against its own serial number for traceability.

Hardware

What the station uses

The press or the joining tool stays in place on the line. Sensors, conditioning, acquisition and an industrial PC turn each stroke into a checked curve against the envelope.

The test

How the test works

Record the curves of known-good parts, and build the envelope from them.
Record the force and the displacement through the full stroke of each press cycle.
Compare the curve with the envelope, and find the seating point.
Store the curve and the result with the serial number of the part.

Software

The open-source software behind it

Your plantReceives the results

MES and quality databaseResults over OPC UA, MQTT or SQL

OpenEOLRuns the workflow

Task engine Open sourceRuns the press or joining cycle step by step

GUI framework Open sourceOperator screens with live data and the result

Reports and database Open sourceOne curve and result stored for each serial number

AnalysisChecks the curve

Filtering Open sourceOpenEOL signal functions remove noise from the force trace before the check

Stroke energy Open sourceOpenEOL signal functions integrate the curve to give the work done in each stroke

Envelope and seating-point checkPass or fail against a window built from known-good parts

DriversTalk to the hardware

OpenEOL IO drivers Open sourceNI DAQmx, Dewesoft or other OpenEOL drivers for the force and displacement sensors

PLC drivers Open sourceSiemens S7 over snap7, Beckhoff ADS or Modbus for the line handshake

Open-source OpenEOL signal functions for filtering and integration run inside the workflow, so your engineers can read and change every step. The program itself is built for each project on top of them.

Related use cases

Other assembly and joining checks

Rivet joint quality inspection

Squeeze force and joint geometry checked against limits, right after the rivet is set.

Leak test integration

A pressure decay or leak test added to the same station, right after assembly.

Component endurance test rig

Cycles counted, with force and displacement logged on every cycle.