Bore hole inspection and 3D metrology

Measuring System: BoreInspect
Keywords: bores, cylinders, valves, bore ID, aerospace, automotive, precision machining

When strict bore specifications are at play

Bore holes in high-precision sectors typically must adhere to strict specifications in some of the following:

  • Dimensional measurements (geometric dimensioning and tolerancing – GD&T) such as inside diameter (ID), circularity, cylindricity, runout, conical taper, perpendicularity, straightness – including axis straightness, and concentricity
  • Inner features such as steps, threads, cavities, chambers, cross-holes, grooves, or O-rings
  • Chatter (lobing, undulation) characteristics
  • Defect characterization
  • Roughness characteristics.

Bore measurements that are non-contact, high-precision and automated

Measuring surfaces in hard-to-reach spaces requires specialized instruments. Novacam BoreInspect, a non-contact 3D measurement system, has been designed with this challenge in mind.  The BoreInspect is a modular and fiber-based system that uses a small-diameter rotational probe to acquire bore hole topography directly and down to the micron.

The optical probe of the BoreInspect scans a bore ID as it rotates and moves into the bore.

The optical probe of the BoreInspect scans a bore ID as it rotates and moves into the bore.

Deviation map of 4 valve body cylinders acquired in one automated scanning sequence highlights out-of-spec measurements.

Multiple valve-body bores measured and analyzed for defects in one inspection sequence. Here, a deviation map of 4 valve body bores acquired in one automated scanning sequence highlights out-of-spec measurements.

Automated or in-lab inspection

With BoreInspect, surface acquisition and the subsequent analysis of dimensional parameters, roughness, chatter, or defects are easily automated and carried out right on the shop or manufacturing plant floor, bringing high-precision manufacturers significant savings.

  • Automation is supported by system capabilities such as datum alignment, automated pass/fail reporting, and exportable reports
  • Bore ID data may be compared to a reference CAD model or evaluated with respect to user-defined criteria (GD&T, inner feature specifications, roughness, and defect inspection).

For in-lab inspection, accompanying metrology software on a PC (e.g., PolyWorksTM) enables full viewing and analysis of the acquired point cloud as a 3D interactive map. Views such as deviation maps provide key insight into bore machining processes.

Technology that enables versatility

The BoreInspect system is based on low-coherence interferometry technology. It is also a modular and fiber-based optical system; its small-sized rotational scanner is connected to the signal-processing interferometer with an optical fiber. As such, the rotational scanner is easily integrated as either a robot arm end-effector or as a 3D vision component in automated or semi-automated systems on the plant floor.

Manufacturers in a range of industries, including Aerospace, Automotive, Glass & Plastics, Dies & Molds, Energy, Medical Equipment, and many others, use the BoreInspect  to automate and speed up the task of high-precision bore inspection.

Related links

Download application note “Measuring Bores” [4 pages, PDF, 0.9 MB] for more details on this application

 Contact us or request free sample analysis to see if BoreInspect is suitable for your application