Studying the Mechanics of Low-Plastic Materials Surface Layer Processed by Deforming Broaching

Nemyrovskyi, Yakiv; Shepelenko, Ihor; Solovykh, E.K.; Bevz, Oleh; Leshchenko, Serhii

doi:10.1007/978-3-031-05230-9_15

Cited by 2 publications

(4 citation statements)

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“…To calculate the plasticity resource according to dependence (7), it is necessary to know the value of the accumulated deformation max 0 e  for 1 processing cycle in the considered inner surface of the pin. In work [12] it was shown that when using a deforming element with an angle α = 5° for expansion, the value max 0 e  = 0.25, and with an angle α = 10°max 0 e  = 0.39.…”

Section: Resultsmentioning

confidence: 99%

“…Using expression (8), we obtain the value of the accumulated deformation on the pin inner surface max 0 e  = 0.16. This value was used to calculate the resource of used plasticity for one cycle of deformation, according to expression (7). Then in one cycle of deformation 0.16 0.024 3 2.34…”

Section: Resultsmentioning

confidence: 99%

“…When choosing the amount of circumferential deformation of the pin hole (tension), the conditions affecting the quality of the pin material should be taken into account. One of these factors, according to the work [7], is the resource of used plasticity.…”

Section: Methodsmentioning

confidence: 99%

“…The resource of used plasticity during two-cycle deformation of the pin on its outer surface, according to the data of work [7], is calculated by the formula: ( 2) 0.0065…”

Section: Methodsmentioning

confidence: 99%

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Development of a technological process for the restoration of piston pins using deforming broaching

Nemyrovskyi

Shepelenko

Chernovol

et al. 2022

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The article discusses the technological process of restoring the geometric dimensional accuracy of piston pins of internal combustion engines (ICE) due to the expansion of the internal hole by a deforming element. As part of conducting research taking into account the resource of the used plasticity of the processed material, the processing modes are determined, the deformation scheme is selected and the geometry of the deforming element is calculated. The selection of the necessary deformation of the part during processing of the piston pin was carried out under the condition of compensating for wear and ensuring an allowance for subsequent mechanical processing. This made it possible to ensure the necessary processing quality of the pin hole surface layer according to the resource parameter of the used plasticity. The deformation scheme was chosen from the condition of ensuring the geometric accuracy of the pin outer surface, which determines the size and uniformity of the allowance for subsequent processing. For these reasons, a scheme was chosen in which the deformation is carried out by two elements with a change of the support end after the first pass. The optimal geometry of the deforming tool was determined from the standpoint of minimizing errors and preserving the initial length of the pin. The results of the conducted experiments showed that using selected expansion schemes, tensions and geometry of the deforming tool, made it possible to ensure the necessary allowance for the next mechanical processing, as well as the invariance of the part length after processing.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The resource of used plasticity during two-cycle deformation of the pin on its outer surface, according to the data of work [7], is calculated by the formula: ( 2) 0.0065…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations