Alloy single section pneumatic measuring platform

Alloy single section pneumatic measuring platformThe single section gas internal measuring platform is a specialized detection equipment based on pneumatic principles, which only performs non-contact high-precision inner diameter measurement on a single section of the workpiece hole. The core is to convert the aperture through the change of gas flow pressure in a single section nozzle. The structure is simple, the response is fast, and it is suitable for batch rapid detection.

Alloy single section pneumatic measuring platform1、 Core Definition and Principles

• single cross-sectionThe probe is only used inSame circular cross-sectionArrange one set (usually 2-4) of symmetrical nozzles, measure only the average inner diameter of the section, and do not reflect the taper, roundness, or cylindricity of the hole.

• Principles of Pneumatic MeasurementConstant pressure clean compressed air is sprayed from the nozzle of the measuring head, forming a small air gap between the nozzle and the hole wall; Aperture change → Air gap change → Air flow back pressure change → Pneumatic instrument converts pressure signal into inner diameter value to achieveNon contact, wear-resistant, micrometer level measurement.

2、 Basic structure (typical desktop)

1. Base and workbench

• Heavy duty marble/cast iron platform, ensuring rigidity and stability; Levelness ≤ 0.02mm/m.

• Workpiece positioning/clamping mechanism (V-block, centering fixture), ensuring the probe and holeStrictly coaxial.

2. Probe component (core)

• Single section measuring headCylindrical plug gauge type, with a central ring of nozzles (through holes) or a bottom ring (blind holes); The aperture covers a diameter of 3 to 200mm and can be customized.

• Lift/feed mechanism: manual/pneumatic, achieving rapid insertion/withdrawal of the probe.

3. pneumatic system

• Gas source: 0.3-0.5MPa, throughThree stage filtration (removing water/oil/dust)+precision voltage stabilization.

• Pipeline: Copper/stainless steel pipe, short and straight with few bends; Probe hose ≤ 1m.

4. Display and Control

• Equipped with float type/electronic column type/digital display gas momentum meter, resolution0.1–1μmThe repeatability accuracy is ≤ 0.5 μ m.

• Tolerance alarm and data output can be set.

3、 Key Performance and Characteristics

• measurement range: diameter 3- diameter 200mm (can be customized to be larger).

• precisionIndication error ≤ ± 1 μ m, repeatability accuracy ≤ 0.5 μ m.

• speedSingle piece measurement ≤ 2 seconds, suitable for online/batch testing.

• advantageNon contact, wear-resistant, resistant to oil and dust, simple and reliable structure, low cost, easy to operate.

• limitation: Only testedSingle section average diameterUnable to evaluate the shape error of the hole (taper, ellipticity); Long holes require multiple movements of the measuring head to measure different cross-sections.

4、 Key points for installation and use

• environmentConstant temperature (20 ± 1 ℃), anti vibration (independent foundation ≥ 300mm, air flotation isolation), dust-free.

• gas sourceClean, dry, and stable pressure; Purge the pipeline with nitrogen before installation.

• calibrationUsing standard rings to define standards; Measure again when the workpiece and probe are at the same temperature for at least 2 hours.

• operationLight probe insertion, coaxial, no eccentricity; Avoid colliding with the nozzle.

5、 Typical applications

• Bearing inner ring, shaft sleeve, hydraulic valve hole, engine cylinder hole, mold guide sleeve, etcPrecision inner hole single section size detection.

• Suitable for rapid sampling/full inspection in workshops and production lines.