Izvorni znanstveni članak

https://doi.org/https://doi.org/10.64486/m.66.1.8

Replacement of an Assembled Tamping Pick for an Integral Tamping Pick

Yue Cui ; Key Lab of Intelligent Equipment Digital Design and Process Simulation, Tangshan University, Tangshan 063000, China
Liyuan Wang ; Department of Intelligent Manufacturing, Tangshan Vocational College of Science and Technology, Tangshan 063001, China *
Huigang Wang ; Key Lab of Intelligent Equipment Digital Design and Process Simulation, Tangshan University, Tangshan 063000, China
Xiangbin Yang ; Key Lab of Intelligent Equipment Digital Design and Process Simulation, Tangshan University, Tangshan 063000, China
Shidong Shi ; Key Lab of Intelligent Equipment Digital Design and Process Simulation, Tangshan University, Tangshan 063000, China
Huijie Han ; Tangshan Metallurgical Saw Blade Co., Ltd., Tangshan 063020, China

* Dopisni autor.

Sažetak

Aimed at optimizing resource utilization, this study leverages finite element analysis (FEA) to compare integral and assembled tamping picks—both are pivotal components in railway ballast tamping machines prone to wear. Traditional integral picks, cast/forged with embedded wear-resistant alloys, suffer from material waste, as they compel full replacement upon head wear. The FEA involved static and modal analyses, where the former revealed that the assembled picks exhibited a maximum equivalent stress 27.5 MPa higher than the integral ones, free from any significant stress concentration. The integral picks concentrated stress on upper/lower surfaces, incurring the under-utilization of mid-section material. The modal analysis compared resonance in the first 10 vibration modes. For the integral picks, the 10th mode demonstrated a maximum amplitude (34.2 mm, 6815.5 Hz) localized at the head. The assembled picks possessed higher amplitudes in the 3rd (69.3 mm), 4th (69.4 mm), 8th (65.6 mm), and 9th (64.6 mm) modes—all on the pole. As manifested by the results, the integral picks’ material waste and stress inefficiency are curtailed by the assembled designs. Notwithstanding their slightly higher static stress, the assembled picks show dynamic behavior (higher amplitudes on the pole vs. head) that aligns better with wear patterns, so that the localized replacement is feasible. Consequently, the assembled tamping picks, supported by FEA results, present a preliminary numerical analysis for more economical solution for railway maintenance.

Ključne riječi

tamping pick, integral, assembled, finite element method, static analysis, modal analysis

Hrčak ID:

350080

URI

https://hrcak.srce.hr/350080

Datum izdavanja:

1.1.2027.

Posjeta: 0 *