Numerical analysis of elastohydrodynamic lubrication characteristics of the spatial cam mechanism in the air splicer

Yang, Fan; Hu, Dexing; Han, Xu; Jiang, Jingwei

doi:10.1007/s12206-022-0635-3

Cited by 1 publication

(2 citation statements)

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“…2 The non-contact dust removal solution uses high-pressure airflow generated by tools such as air knives and pneumatic nozzles to remove impurities and dust adhering to PCBs, and collects the raised dust and other pollutants by setting up dust-absorbing devices using the principle of negative pressure, but the air knives used as dust-blowing tools are too large in size, have limitations in installation location, and the number of nozzle openings is too large causing large air loss, and the dust removal angle is mostly fixed and cannot meet the dust-blowing needs of complex structure spaces. [3][4][5] Scholars have carried out various studies on pneumatic nozzles. By conducting simulation experiments, Zhao 6 demonstrated that for a certain nozzle and workpiece configuration, there exists an optimal jet distance that maximizes the jet operation efficiency and minimizes the energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pneumatic rotary nozzle structure optimization design and airflow characteristics analysis

Wang,

Yang

2023

Advances in Mechanical Engineering

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In this paper, the impact jet field between the pneumatic nozzle and the workpiece surface is simulated by the computational fluid dynamics method, and the influence law of the nozzle structure parameters on the jet performance is obtained by combining the response surface method (RSM), so as to improve the dust removal effect of the pneumatic nozzle. Firstly, the nozzle impact jet field calculation model was established, and the experimental platform of wind speed and volume measurement was built to verify the accuracy of the numerical calculation model and to simulate and analyze the jet field distribution characteristics of the nozzle under rotating working conditions. Then combined with the Box-Behnken Design (BBD) method, a response surface regression model with nozzle inlet radius ( R1), cylindrical section length ( L), and cone angle ( A) as design variables and nozzle jet fixed point (20 mm) flow rate as the target variable was established to find the optimal combination of nozzle characteristics parameters. The results show that the optimized nozzle characteristics parameters using RSM can effectively improve the nozzle jet performance, the optimized jet flow rate increased by 8.38%, and can be more effective in dust removal; jet pressure on the workpiece surface decreases as the nozzle incidence angle increases; in the speed range of 400–1200 r/min, the pressure change caused by the jet on the wall surface is small, and the flow rate is relatively stable.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%