Keith Vince 2013-02-24 02:17:28
In today’s manufacturing environment high-precision non-contact optical shaft metrology is a rock-solid investment whether it’s an entry level SPC measuring station operated by the workers or a fully automatic system for 100% part inspection. Both hardware and software for these systems are optimized for production environments and provide gauging component capability focused on maximum reliability over the long term. These systems have been designed for continuous operation, reducing wear using a non-contact optical sensor that also eliminates the risk of collision. These systems are supported by intelligent and user-friendly man-machine interfaces, ideal for worker self-inspection. Tremendously high reliability and extreme precision make these types of systems particularly beneficial to the aerospace industry. Examples of existing applications are carrier shafts for aircraft engines and drive parts in helicopters, including a measuring system for rotary parts with a diameter up to 30mm and lengths up to 200mm. Other applications for shaft measuring systems have measuring capacities for diameter up to 480mm and lengths up to 2500mm. Nearly universal in application for shaft type workpieces, optical shaft metrology offers maximum flexibility as well as the potential to replace more conventional gauging components. Geometry elements (angles, radii, etc.), form (roundness & run-out) and dimensions such as lengths/distances can all be measured in a single pass. Using a simple measuring program to combine these evaluations, the operator can quickly and easily generate quality assurance information during the production process from a single measurement. This is a big advantage, for example, compared to more conventional measuring machines needing to be reset for each measurement and where large numbers of measurements exist. Additional flexibility comes from part holding devices using Morse tapers, enabling quick loading of new work pieces that eliminate lengthy setup times. These systems deliver long-term gauging capability with ìm (micron) accuracy in very short cycle times, with measurement results being available within just a few seconds. With conventional measurement system, complete measurement of a workpiece often lasts several minutes. Measuring principle Using the silhouette principle, each workpiece is automatically scanned along its entire programmed length. The complete workpiece contour can be quickly and precisely evaluated as a result of the high measuring resolution. The outside contour data of each workpiece is recorded during the rotational movement. Multiple standard measurement functions can be combined depending on the measuring program which then follow an optimized automatic measuring run. Simple to uSe Controlling these measuring systems is simple. Using pre-programmed standards measuring programs can be created with just a few mouse clicks. Creating programs, display screens, and other part processing results take place easily and intuitively by means of a Windows® based graphical user interface (GUI). Depending on the measurement task, standard measuring functions can be quickly combined into one automatically optimized measuring run. Creating new test programs can be completed in just a few simple steps. First the workpiece is loaded into the measuring system and clamped between centers. Second the part is completely scanned and saved into program memory (This only lasts a few seconds). Last but not least, new test characteristics are added by selecting them from the software options. This capability helps guarantee future value for a wide range of applications, and the high measuring speed ensures very high productivity. Automatic system monitoring maintains the calibration states of these measuring systems using integrated, high-precision step disks and temperature sensors, which are also utilized for intelligent temperature compensation. The integrated step disk replaces the normal setting master for daily use. Active temperature compensation automatically takes place during every measuring run, with the measuring system automatically monitoring itself for negative ambient influences. This offers a high degree of stability and quality assurance in production applications. These systems offer a wide variety of flexibility for automatic or manual self inspection, and have proven their reliability at various manufacturing sites around the world. Hommel-etamic America 1505 West Hamlin Rd. Rochester Hills, mi 48309 tel. 248-853-5888 www.hommel-etamic.com
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