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| | | Piezoelectric Force Measurement in Practical Applications | | |
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| | | Steering column bearings are safety components. Conventionally, the steering column bearings are pressed onto a shaft to form a frictional connection. The quality control of these press-fit processes is mostly conducted by means of force-displacement monitoring. Special quartz force links calibrated for tensile and compressive forces can be integrated easily into the push rod of the press. These force links are ideal for measuring the press-fit forces, which can be very high in parts. Together with an additional displacement sensor and a control monitor, the recorded force-displacement curve provides relevant information on the quality of the press-fit connection. | | |
| | | Car steering columns must meet maximum security requirements. Therefore, assembly of these components and particularly the assembly of the bearing must be monitored and documented. Monitoring the force-displacement allows a clear separa tion of good and bad parts as well as the documentation of every single joining sequence in compliance with manufacturing guidelines for safety components. | | |
| | | Process Monitoring Different evaluation strategies featuring thresholds, boxes, gradients and stop positions can be used for monitoring the assembly of the steering column's ball bearing with control monitors such as CoMo View and CoMo Net. | | |
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| | | Monitoring of the press-fit force and the bearing position: box 2 monitors Histogram of the entry and exit of evaluation element 4 with relevant the interference fit, while box 3, 4 and the gradient 7 monitors the press-fit statistical values force and box 5 monitors the end position | | |
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