OEM Installs its Second Tru3D Piston Pin Circlip Inspection Solution

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A local OEM transforms its assembly verification process for piston pin circlips with the advanced non-contact Tru3D technology - aiming to continue its zero escape rate and detecting any missing or improperly installed circlips.

Missing Circlip 3D Image

Missing Circlip 3D Image

For the last year the OEM has successfully run its first Tru3D inspection line with a zero escape rate while detecting numerous instances of missing or improperly installed circlips.

Coherix kicks off 2014 by further satisfying the market demand for piston pin circlip inspection systems. A local Original Equipment Manufacturer (OEM) purchased and installed its second Tru3D piston pin circlip solution, now covering all piston pin circlip assemblies at their facility. For the last year, the OEM has successfully run its first Tru3D inspection line with a zero escape rate while detecting numerous instances of missing or improperly installed circlips.

The second Tru3D system will augment the OEM’s original manual piston pin circlip inspection process. Now all of the pistons that are made with circlips are inspected with the robust Tru3D non-contact technology. The OEM expects that the success rate of this advanced inspection process will continue to be widespread.

With the flexibility of the software and the configuration of the sensors, the installation process is minimized, allowing it to be completed in one weekend. This assembly verification system inspects both sides of two pistons at a time - enabling the system to detect multiple causes of incomplete or incorrect assemblies, as well as verifying the right parts were used. This solution doubles the original system’s capacity and throughput. With a cycle time of 25 seconds, a piston assembly is being inspected roughly every six seconds.

Tru3D for circlips is the first full 3D in-line assembly verification system with no moving parts. The system checks for clip presence, full seating, gap position, double clips, flipped piston as well verifying piston style and that the correct wrist pin is installed. The 3D data has led to an error proofing solution that is more robust, simpler to use, and lower cost to own than conventional methods.

With the Tru3D system, an entire 3D surface map of an assembly is being created and inspected. This eliminates the lighting and part placement variation issues that are experienced with the 2D non-contact systems. The surface map is constructed by creating and locating high contrast light patterns on the assembly’s surface. This technique does not rely on precise light positioning, intensity, or color and is vastly more tolerant of production noise. As long as the structured patterns are visible on the assembly’s surface, an accurate 3D map is created regardless of surface finish, placement, or color. Tru3D combines the benefits of no moving parts and non-contact acquisition, with the analysis of thousands of 3D surface points.

Coherix is a privately held, global supplier of high-speed, high-definition 3D visualization and inspection solutions designed to improve the management of manufacturing processes. Headquartered in Ann Arbor, the company has technical centers in Europe and the Asia Pacific region. Coherix products are being utilized around the world at companies such as Intel, Amkor, BorgWarner, Ford, Honda, Allison Transmission, Chrysler, General Motors, Micron, Infineon, John Deere, Volvo Technology Transfer and Aisin among others.

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Amanda Washburn
Coherix, Inc.

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