Some Characteristics of Compressible Air Impingement Jet Applied in Pneumatic Dimensional Control

Skoko, Dragiša; Crnojevic, C.; Lečić, Milan; Ristivojević, Mileta; Mitrović, Radivoje; Burazer, Jela M.

doi:10.1007/s40799-021-00460-6

Cited by 3 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental equipment we used in this research is schematically shown in Figure 2. This is the same experimental equipment that was used in the research pre-sented in [18]. A jet of compressed air flows through the measuring nozzle N 1 and hits the flat plate FP.…”

Section: Experimental Rigmentioning

confidence: 99%

“…Except in the case of the lowest supply pressure, the increase in slot width δ leads to an increase in the vacuum zone size Δr. One should be careful with greater δ values because there is a possibility of signal instability occurrence which leads to controlling error, (see Figure 5) [18][19][20][21].…”

Section: Experimental Rigmentioning

confidence: 99%

“…The other parameter, also important for pneumatic comparator functioning is its accuracy. It is expressed through the quantity named pneumatic sensitivity S [18]. The pneumatic sensitivity is defined in the axial distribution of pressure on the surface of the controlled workpiece.…”

Section: Quantities Influencing the Accuracy And Application Range Of...mentioning

confidence: 99%

See 2 more Smart Citations

On some important quantities influencing proper functioning of the differential pneumatic comparator

Burazer¹,

Skoko²,

Novković³

et al. 2022

FME Transactions

View full text Add to dashboard Cite

Back-pressure air gauging is an effective and practical way of controlling machine parts in large-scale production. It is a non-contact measuring technique based on the flapper-nozzle effect. The proper functioning of a differential pneumatic comparator depends on several geometric parameters as well as flow conditions inside the device. The main problems of this controlling technique are the fouling of the measuring nozzle head and changes in the accuracy of the comparator. This paper examines the influence of the supply pressure, the diameter of the orifice in the measuring branch, and the axial distance in the flapper-nozzle area on pneumatic comparator performance. In a way, we are trying to optimize the performance of a given pneumatic comparator with respect to the tolerance field for which it is intended. The size, strength, and position of the vacuum in the flapper-nozzle area depend on the supply pressure and the axial distance between the measuring nozzle outlet cross-section and the workpiece surface. For a certain combination of these two parameters, we can influence the vacuum quantities. A pneumatic sensitivity of a comparator can be increased by increasing the supply pressure. The greater accuracy of the back pressure air gauge, the smaller the application range, i.e. the tolerance field that we can control with a given device.

show abstract

Section: Experimental Rigmentioning

confidence: 99%

Section: Experimental Rigmentioning

confidence: 99%