What is Crimping Force Monitor

Crimping Force Monitor (CFM) is a device that monitors the quality stability of the manufacturing process by detecting the crimp force in the crimping process of the crimping machine .

The principle is : first collect a certain number of good product waveform and generate a reference waveform . Then compare the waveform of production with the reference waveform .If the difference exceeds the preset threshold , the alarm signal is output to suspend the manufacturing process . The specific comparison method is to extract the eigenvalue(such as the peak and area of the specified interval ) in a specified interval and compare with the reference waveform . For the alarm wave forms , a manual confirmation is needed for product quality control . After choosing good or bad manually , the alarm state will be reset automatically and the manufacturing process can be continued .

What Can CFM Actually Detect:
There is a general assumption within the industry that crimp force monitoring will provide reliable detection of all general crimping errors during processing, including:
  ● Wrong strip length
  ● Missing strands
  ● Wrong wire cross section
  ● Wrong terminal
  ● Inconsistent terminal material
  ● Insulation in wire crimp
  ● Wrong insertion depth
  ● Wrong crimp height

Wire Protrusion: 
Alarm pressure wave forms tend to decrease throughout the waveform . However , the waveform is not severely tilted . The same waveform appears when the wire is broken .

Insulation Protrusion:
The insulating material protrudes into the terminal crimping portion and is crimped with the core wire , causing the wire to break. It can be clearly observed that the pressure drops sharply before reaching the peak .

Offsetting:
The degree of offsetting is measured by the distance between the front end f the core and the bell mouth crimped by the terminal . In this case, the offsetting is about 1mm . Although the pressure wave forms are similar, the overall waveform is reduced . As a result , all factors are below neglectable tolerance limit .

Wire Broken:
The insulating material protrudes into the terminal crimping portion and is crimped with the core wire , causing the wire to break . It can be clearly observed that the pressure drops sharply before reaching the peak.