Investigation on the effect of laser parameters and hatch patterns on the dimensional accuracy of micro-dimple and micro-channel texture geometries

Rajurkar, Avadhoot; Chinchanikar, Satish

doi:10.1007/s12008-023-01258-z

Cited by 2 publications

(2 citation statements)

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“…In practical applications, overrunning spring clutches may experience abnormal noise during the upward stroke, resulting in reduced efficiency and potential damage to the clutch. [17]. Additionally, in the production of overrunning spring clutches, the processing method of laser texturing involves the secondary processing of injection-molded parts, thereby causing the processing efficiency of laser texturing to be lower than that of onetime injection molding [18].…”

Section: Analysis Of Abnormal Noise Causesmentioning

confidence: 99%

“…Seid Ahmed et al [13] utilized a titanium sapphire laser to generate various geometric textures on austenitic stainless steel, and through experimental investigation, it was concluded that the surfaces treated with textures exhibited lower friction coefficients and better wear resistance compared to untreated surfaces. However, in practical engineering applications, the bases of overrunning spring clutches are often injection-molded components, and laser-based surface micro-texturing methods present certain issues, including thermal effects [14,15], the formation of debris [16], and the creation of dimples [17]. Additionally, in the production of overrunning spring clutches, the processing method of laser texturing involves the secondary processing of injection-molded parts, thereby causing the processing efficiency of laser texturing to be lower than that of one-time injection molding [18].…”

Section: Introductionmentioning

confidence: 99%

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Study on Dynamics of Overrunning Spring Clutches and Suppression Methods for Their Abnormal Noise

Zhou,

Qiu,

Zhang

et al. 2024

Actuators

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Overrunning spring clutches are widely used as essential transmission devices, and the occurrence of abnormal noise can lead to a decline in their performance. This study investigates the dynamic aspects of abnormal noise in engineering applications, including its causes, influencing factors, and suppression methods. Audio processing algorithms are employed to analyze the audio associated with abnormal noise, and the Fourier Motion Blur algorithm is applied to process video images of the springs. By combining the motion blur curve with the noise spectrum curve, the source of the abnormal noise is identified as friction-induced vibrations in the spring. Theoretical modeling and calculations are carried out from a dynamic perspective to validate that the phenomenon of abnormal noise in the clutch is a result of self-excited friction vibration caused by the stick–slip phenomenon. Based on theoretical analysis and practical engineering, surface texturing is added to the center shaft of the spring seat, optimizing the system as an overdamped system to suppress self-vibration. Utilizing CFD simulation analysis, the simulation results are used to improve the texturing parameters and further optimize the texturing shape, resulting in an optimal parallelogram surface texture structure. Experimental validation confirms that the improved overrunning spring clutch completely eliminates abnormal noise during overrunning operation. Therefore, this paper contributes to the understanding of the dynamic issues associated with abnormal noise in overrunning spring clutches, confirming that the mechanism for abnormal noise generation is friction-induced self-excitation vibration, and demonstrating that surface texture optimization methods effectively suppress the occurrence of abnormal noise.

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Section: Analysis Of Abnormal Noise Causesmentioning

confidence: 99%