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Quality control of rubber seals on the basis of height measurements

30 May 2017

The measurement of object height is an important aspect in quality control applications. With its PosCon HM light-section sensor, Baumer can offer a compact measuring device for such tasks.

The smart, pre-configured profile sensor offers five measurement modes for different measurement tasks.

An exact positioning of the measured objects is not required. The PosCon HM is said to provide reliable measurements even on shiny and very dark surfaces. In conjunction with its measuring accuracy of up to 2 µm, the sensor is suitable for a number of applications in at-line, off-line and in-line control.

One example is the inspection of black rubber seals for side windows in the automotive industry. Random samples are tested off-line on a special test bench and the seals are fitted into special mounts on a measuring setup. The forms and the curves of the seal may vary, but they must not exceed special limit values. The challenge for the sensors is not only the form, or, to be more precise, the curves, but also the black, light-absorbing material.

PosCon HM uses algorithms to analyze up to 600 items of height information per measurement and determine the maximum height of the object, irrespective of its position. 

The PosCon HM also offers a suitable measuring tool for the inspection of metallic, glossy preformed parts, for example the inspection of car doors. The sensors can check the correct form of the car door, for example, by performing measurements at numerous test points. The sensors can also be mounted close beside each other without influencing each other. The PosCon HM provides the measured values directly in mm, thus allowing an immediate OK/Not OK check for each test point. 

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