Securing clamping process

In modern industrial machining production, securing the clamping process is a crucial point: the cycle must stop if one of the parameters to be monitored is no longer valid.

The equipment must ensure permanent monitoring of the cycle, if necessary, to fault and identify the problem.

In a typical application, on a machine equipped with a single hydraulic unit, the cycle is carried out hydraulically using components called sequence valve.

In this case, the quality of the part is directly linked to the proper functioning of a hydraulic component, without securing in the event of failure.

In the vast majority of machine equipment developed by CN-PROJECT, the cycle is performed using electro-hydraulic automation: each step is validated before moving on to the next.

Several critical points can be monitored:

  • The "part plating" check, thanks to an air leakage system using high performance "sensors", makes it possible to ensure that the part is correctly positioned on its references. This control directly impacts the quality of the machined parts.
  • Control of the clamping force, using wired or wireless pressure switches, ensures that the machining forces are under control.
  • Control of "part presence" thanks to "overstroke" sensors on the clamping cylinders: In the absence of any part, the cylinder clamps to the limit of travel and therefore feeds the information back to the PLC, thus signaling a possible problem in the supply chain

However, it is not enough to control only states, it is necessary to control a step sequence and in particular the sequence of the positioning / clamping cycle of the part on the assembly: A faulty step stops the cycle, the operator or the robot cannot continue their operation. work until the problem is solved: there are no bad parts produced.