Effects of vacuum oil quenching on distortion of 42CrMo Navy C-ring

Liu, Jing; Li, Jiadong; Tian, Yong; Li, Yong; Wang, Zhaodong

doi:10.1080/02670836.2022.2098622

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…In order to prevent die wear and enhance the strength of the die, heat treatment including heating to 850°C and cooling in water was done. 23 For experimental tests, a power supply, an ultrasonic transducer, a hydraulic press machine, and a load cell with 50 tons of capacity have been used. The die and related punch and horn have been built based on the numerical simulation results.…”

Section: Experimental Set-upmentioning

confidence: 99%

A new method to exploit ultrasonic vibrations in deep drawing process

Kishani,

Mazdak,

Sheykholeslami

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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In the deep drawing process of sheet metals, lack of formability and the defects generated as a consequence of friction are two main limiting factors. Using ultrasonic vibration is an impressive way to decrease these limitations. In this paper, the ultrasonic – aided deep drawing process with a novel way of applying radial ultrasonic vibration is presented. The novelty of the presented method is using the bending mode of vibration in the sheet metal and the die using radial ultrasonic vibration. The presented method, contrary to the other techniques of applying ultrasonic vibration, has shown much fewer resonance frequency variations by changing the sheet metal geometry during the process and likewise with a variation of the clearance between the blank holder and the die. For this purpose, the finite element method was used in designing the equipment for the deep drawing process. The experimental test was done on St12 in the presence and absence of ultrasonic vibration. The effect of ultrasonic vibration in the presented method on the wrinkling and thinning defects and likewise the forming forces were experimentally studied. The results indicated the high efficiency of the presenting method in decreasing both the forming forces and the wrinkling and thinning defects. About a 42.3% decrease in the forming forces and a 4.4% decrease in the thinning effect were achieved by applying ultrasonic vibration.

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Section: Experimental Set-upmentioning

confidence: 99%