Thrust measurement
Actual thrust relative to motor torque or hydraulic pressure is measured with a load cell.
If a significant drops in thrust is observed compared to when the machine was delivered, the linear rails, ball screws, hydraulic pumps, or hydraulic cylinders, etc. may need to be replaced.
Static accuracy measurement
A master workpiece is gripped by the chuck and clamp, and runout accuracy and off center accuracy are measured. If off center exceeds tolerance values, and there is also a problem with workpiece runout accuracy after pressure welding, the chuck and clamp devices, etc. may need to be replaced.
Obtaining waveforms during pressure welding
Thrust, upset length, and spindle speed during pressure welding are gathered as waveform data, and a check is carried out to ensure that there are no abnormalities in each control timing or behavior.
Pressure welding waveforms are used mainly for analyzing defects in pressure welded parts.
Pressure welding waveforms are affected by a variety of factors including mechanical part degradation, thrust abnormalities, and abnormal static accuracy, and if abnormalities are found, a more detailed investigation may be required at a later date.
Inspection based on check sheet
The major parts of Izumi’s friction welding machines are checked based on their appearance and by feel.
