Industrial Gas Turbine (IGT) Bucket Inspection

High-Accuracy Inspection and Measurement of Industrial Gas Turbine (IGT) Buckets

The ever-increasing performance requirements of land-based gas turbines requires that they be manufactured to meet tighter and tighter requirements. Buckets represent some of the most critical parts in power generation systems and their fir tree root form is where some of the tightest-tolerance requirements are found.

The Super-Extended 500 Series VisionGauge® Digital Optical Comparators are designed to carry out very high-accuracy inspection and measurement of large parts and heavy loads and, as such, they are perfectly suited to the inspection and high-accuracy measurement of Industrial Gas Turbine (IGT) Buckets.

IGT Bucket Profile Inspection

VisionGauge® systems – with their patented CAD Auto-Align™ and CAD Auto-Pass/Fail™ tools – are the perfect solution to check the bucket’s root form profile as well as the profile’s location relative to the part’s datum set.

VisionGauge® is extremely fast, produces very high-accuracy operator-independent results, and can automatically produce complete inspection reports.

500 Series VisionGauge® Digital Optical Comparator - Super-Extended Travel Configuration
The super-extended travel configuration 500 Series VisionGauge® Digital Optical Comparator for inspection of large and heavy parts.
Super-Extended Travel 500 Series VisionGauge® Digital Optical Comparator inspecting fir tree / root forms on buckets
Fir Tree / Root Form Inspection with the Super-Extended Travel 500 Series VisionGauge® Digital Optical Comparator

The Super-Extended Travel Configuration of the 500 Series VisionGauge® Digital Optical Comparator accommodates up to 60″ of travel and supports heavy loads up to 300 pounds. These systems are very robust and ready to operate directly on the shop floor.

VisionGauge®’s patented inspection technology quickly and accurately computes and displays the deviation from nominal at a part’s control sections and compares the results to bi-directional tolerances. The result of each comparison can be collected in a report and an overall Pass/Fail or Go/No-Go result can be output for each part. You can check parts against their CAD data across the entire range of travel, beyond the optical field-of-view – completely automatically.

Contact us for more information about how our VisionGauge® Digital Optical Comparators can meet and surpass even the strictest of your Industrial Gas Turbine application requirements, including IGT bucket inspection and measurement.

Learn about other applications regularly being solved with VisionGauge® Digital Optical Comparators, including additional applications in the Power and Energy / Industrial Gas Turbine market.

Cooling Holes Inspection / Cooling Hole Measurement and Verification

 The 700-Series VisionGauge® Digital Optical Comparator is the Perfect Solution for EDM- and LASER-Drilled Holes and Slots Inspection and Measurement

The 700 Series VisionGauge® Digital Optical Comparator is widely used by manufacturers across a broad range of industries (including aerospace and power generation) to inspect and measure EDM- and LASER-drilled cooling holes and slots:

  • Automatically verify hole presence & accurately measure hole locationCooling Hole Inspection - Verifying Presence, Shape, and Location
  • Supports both round and shaped holes
  • 5 axes of motion (X, Y, Z, Rotary, Tilt) to properly view parts from all sides & angles
  • Quickly, easily, and accurately inspect 100% of the holes on your parts
  • Robust shop floor design
  • Can output the hole offsets which can be used to modify EDM drilling programs
  • Mounting system allows your parts to go directly from the EDM drilling machine to the inspection and measurement system without re-fixturing (quick & easy and also minimizes stack-up error, etc…)
  • The system can be supplied with the same working envelope as your EDM drill. If you can drill it, we can check it!
  • Holes can be checked either one at a time, looking straight down each hole’s nominal axis (ideal for coated parts, to minimize errors due to coating thickness variations) or multiple holes can be checked at once, viewing them at an angle (which is even faster and well suited for uncoated parts or parts with a uniform coating thickness)
  • The system has an extended depth of field, so that everything is perfectly in focus regardless of the part’s geometry (even in areas of very high curvature) as well as a very long working distance (so that there is lots of clearance between the part and the entire optical system to comfortably accommodate large and unusually-shaped parts)
  • Extremely powerful “adaptive” feature-detection software tools are able to accurately find and locate EDM-drilled holes on different surfaces, with different reflectivity, at different viewing angles, etc…
  • Specialized software tools are especially well suited to deal with burrs and splatter
  • Automatically create reports and collect measurements, statistics, images and other data for complete documentation
  • Fast and intuitive “operator review” mode allows the operator to quickly revisit out-of-tolerance areas, etc…
  • The ideal system for inspection and measurement of cooling holes on aircraft engine and IGT (Industrial Gas Turbine) components (blades, vanes, heat shields, shrouds, etc.). Parts can be either (ceramic) coated or uncoated.

EDM-drilled or Laser-drilled cooling hole measurement and inspection

Quickly, accurately, and easily carry out cooling holes inspection and measurement of round and shaped holes.

Automatically Verify Hole Presence and Location

measurement and inspection of EDM- and LASER-drilled drilled holes and slots

Supports Both Round & Shaped Holes, Anywhere on the Part!

An extended-travel machine with 24″ x 24″ x 24″ travel and a trunnion configuration for large and heavy parts is also available, along with other customizations.

Ring with cooling holes
Ring with cooling holes. For the larger rings, it is typical to use an extended-travel 700 series system to check the hole presence and measure the hole location and geometry.

The 700-series VisionGauge® Digital Optical Comparator is a very cost-effective, perfectly adapted solution for the measurement and inspection of EDM-drilled holes. It is rapidly becoming the new standard in the industry!

Download a .pdf version of this VisionGauge® Digital Optical Comparator Application Note here.