each part to detect any small thread damage that may only be on a small portion of the shaft.” The GI-360 measures a number of critical fastener fea-


tures such as head and shaft diameter, lengths, straightness, concentricity, thread angle and diam- eter, including major, minor and pitch diameter. It also detects any damaged threads, along with cracks on the bolt head and flange.


“When you have a hexagonal bolt, you have critical dimensions from a flat to the opposite flat on each of the six sides,” said Alexander. “It is also crucial to measure across corner dimensions as well.”


“Brugola Italy and Brugola USA worked with General Inspection to advance the capabilities of the laser gaging inspection equipment,” said Oc- chionero. “The equipment is looking at lots of things at one time. We look at all the dimensions you can think of on the screw, all the dimensions required by the customer for a critical fastener.” When the fastener inspection sys- tem manufacturer worked to improve the accuracy of dimensional measure- ments, the result was a redesigned ver- sion of the device, the GI-360T, which includes a tilt-and-lift feature for the laser head. This ensures the lasers are perpendicular to the part and corrects for the cosine error of headed parts, providing improved measurement readings for diameter (0.005 mm) and length (0.01 mm), total error. With Brugola’s dedication to zero- defect manufacturing of its critical en- gine fasteners, the company sought to further enhance the fastener inspection system. As an option on its high-speed fastener inspection system, Brugola selected an axial viewer lens system for 360° head crack detection. In support of the Brugola’s goals, General Inspection improved crack


detection in order to detect cracks, scratches, or missing features on the side flange of bolts. This specialty lens “sees” around the head of the part.


Continued on P82


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January 2017 | AdvancedManufacturing.org 47


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