Home Forums Quality Inspection What is the best dimensional inspection tool?

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    The dimensional inspection ensures that the engine’s component parts and clearances comply with the manufacturer’s requirements. These specifications are provided in a table of limits, which includes serviceable limits as well as the manufacturer’s maximum and minimum dimensions for new parts. The engine’s dimensional inspection is done with a variety of measurement equipment. There is a bulk of dimensional inspection tools available in the market such as Calipers & Caliper Gages, Micrometers, Coordinate Measuring Machine Tools, etc, but which one is the best or the most accurate?

    Jake Able

    The type of dimensional inspection device that is utilized for a given application is determined by several criteria, including:

      The desired level of precision
      Is it possible to touch the thing during the measurement process?
      The object’s physical and surface qualities
      The object’s transparency or opaqueness
    Mike James

    CMMs are considered to be the best dimensional inspection tools now, are most often used to test a part or assembly to determine whether or not it meets the original design intent. CMMs are integrated into quality assurance or quality control workflows to verify the dimensions of manufactured components to prevent or resolve quality issues.
    The advantages of using CMMs over manual inspections or checks performed with conventional metrology instruments, such as micrometers and height gauges, are: accuracy, speed, and reduced human error.

    Mike James

    Manufacturers today are under increased pressure to increase throughput, deliver just-in-time delivery schedules, and get them to market faster, all while dramatically minimizing costs. When bottlenecks occur on the CMM, inspection procedures extend cycle times and ultimately increase non-value added quality costs. The speed and efficiency of CMM are therefore essential.

    As already mentioned, bottlenecks on CMM are often due to the huge volume of work that has to be done by a limited number of qualified metrologists. CMM programming times also lengthen inspections considerably, because the CMM must be configured for each type of component or subassembly to be evaluated.

    Conventional CMMs with probes are slow and not suitable for effectively measuring complex shapes. Other CMMs, with sensors, tend to speed up inspection processes; however, they still need to be used by experts.

    Manufacturers are therefore increasingly looking for inspection technologies, such as innovative optical CMMs, that can keep up with the fast pace demanded by demanding production environments and stringent quality assurance and quality control standards.

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