Strojniski Vestnik-Journal of Mechanical Engineering最新文献_第2页

An Investigation on Laser Welding Parameters on the Strength of TRIP Steel 激光焊接参数对TRIP钢强度影响的研究

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2021-02-24 DOI: 10.5545/SV-JME.2020.6912

S. Rahul, T. V. Rao, N. HarshaD, H. Girish, T. Ishigaki, P. Madhusudan

引用次数: 4

Dynamic Analysis of Hydraulic Support with Single Clearance 单间隙液压支架动力学分析

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2021-02-24 DOI: 10.5545/SV-JME.2020.6998

Q. Zeng, Yang Li, Yang Yang

{"title":"Dynamic Analysis of Hydraulic Support with Single Clearance","authors":"Q. Zeng, Yang Li, Yang Yang","doi":"10.5545/SV-JME.2020.6998","DOIUrl":"https://doi.org/10.5545/SV-JME.2020.6998","url":null,"abstract":"Hydraulic support is a complex parallel mechanism composed of multiple kinematic pairs. In the work of hydraulic support, clearances between kinematic pairs are inevitable, which lead to the deterioration of the support’s working performance, and may even affect support’s normal work in serious cases. To study the influence of clearances on hydraulic support and simultaneously avoid the mutual interference between different clearances, the normal and tangential force models of kinematic pairs with clearance are established, based on the Lankarani-Nikravesh contact force model and the Coulomb friction model. Furthermore, the dynamic model of the hydraulic support with single clearance is established by adding a clearance between the rear link and base and, according to the dynamic model of the hydraulic support, the research about the influence of clearance on the movement and force of hydraulic support is carried out, which proves the need to study the clearance of hydraulic support. Moreover, the influence of clearance, clearance size, and different oil inlet drive modes of front and rear columns on the stability of hydraulic support are analysed, and then the change of hydraulic support posture caused by clearance and clearance size is considered. The results show that clearance causes the movement and force of the rear link to fluctuate, which affects the stability of the hydraulic support. The clearance size affects the fluctuation degree of the movement and force, which is an important factor in the instability of hydraulic support. Also, the hydraulic support posture is changed by the clearance and clearance size. Different column oil inlet drive modes have different impacts on the clearance and have different effects on the stability of hydraulic support.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74736522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Temperature and Heat Partition Testing in the Cutting Zone for Turning AISI 321 Steel AISI 321钢车削区温度和热分区试验

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-11-15 DOI: 10.5545/sv-jme.2020.6840

M. Bartoszuk

引用次数: 0

Research on the Performance of a New External Occlusion Device for Pressure Vessel Leakage 新型压力容器泄漏外闭塞装置的性能研究

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-11-15 DOI: 10.5545/sv-jme.2020.6810

Yan Hongwei, Yang Xiong, Hou Xiangrong, Wang Lu, Liang Pengcheng

引用次数: 1

Research on the Lubrication Characteristics of Harmonic Gear Transmission Meshing Areas 谐波齿轮传动啮合区润滑特性研究

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-09-15 DOI: 10.5545/sv-jme.2020.6667

X. Xu, Xupeng Fan, P. Wei, Bao Yang

{"title":"Research on the Lubrication Characteristics of Harmonic Gear Transmission Meshing Areas","authors":"X. Xu, Xupeng Fan, P. Wei, Bao Yang","doi":"10.5545/sv-jme.2020.6667","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6667","url":null,"abstract":"To analyse the lubrication characteristics of harmonic gears and lay the foundation for the study of its gear tooth failure performance and dynamic characteristics, based on the tooth contact geometry of harmonic gear, the integrated curvature radius, tooth load, and entrainment velocity at the meshing point of the gear teeth in the harmonic gear transmission are analysed. A finite-length line contact elastohydrodynamic lubrication (EHL) model for harmonic gears is established. The numerical calculation method is used to solve the oil film thickness and pressure distribution in the lubricating area, and the effects of rotational speed and temperature on the contacting load ratio and film thickness ratio of the meshing area are studied, as well as the change of oil film stiffness under different working conditions. The results show that along the meshing direction, the pressure is small at the end and reaches a peak at the centre, and the film thickness is the largest in the entrance area and is evenly distributed in the centre contact area. As the speed increases, the gear tooth contact load ratio decreases, the oil film thickness ratio increases, the stiffness of the oil film decreases significantly, and the lubrication effect is improved; but the temperature has the opposite effect. Proper increase of rotation speed and decrease of oil temperature can effectively improve the lubrication characteristics of the system.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88248119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Microstructure and Property Modification of Cold Sprayed Coatings Using Different Grain Sizes of Cr3C2-25(Ni20Cr) Composite Powder 不同晶粒尺寸Cr3C2-25(Ni20Cr)复合粉末冷喷涂涂层的组织与性能改性

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-09-15 DOI: 10.5545/sv-jme.2020.6688

A. Trelka, W. Żórawski, A. Góral

引用次数: 4

3D FE Modelling of Machining Forces during AISI 4140 Hard Turning AISI 4140硬车削加工力的三维有限元建模

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-07-31 DOI: 10.5545/sv-jme.2020.6784

A. Tzotzis, C. García-Hernández, José-Luis Huertas-Talón, P. Kyratsis

引用次数: 9

Comparative Analysis of Static and Dynamic Performance of Nonpneumatic Tire with Flexible Spoke Structure 柔性辐条结构非充气轮胎静、动态性能对比分析

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-07-31 DOI: 10.5545/sv-jme.2020.6676

Zhang Zifeng, Fu Hongxun, Liang Xuemeng, Chen Xiaoxia, Tan Di

引用次数: 20

A New Design Solution for Aircraft Wheels that Reduces Overpressure in the Tire while Retaining its Absorption Power and its Dimensions 一种新的飞机车轮设计解决方案，在保持其吸收力和尺寸的同时减少轮胎的超压

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-07-15 DOI: 10.5545/sv-jme.2020.6593

D. Petrović, Marjan Dodić, Nenad Kapor

{"title":"A New Design Solution for Aircraft Wheels that Reduces Overpressure in the Tire while Retaining its Absorption Power and its Dimensions","authors":"D. Petrović, Marjan Dodić, Nenad Kapor","doi":"10.5545/sv-jme.2020.6593","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6593","url":null,"abstract":"It is well-known that high working overpressure in a tire adversely affects its service life, while a lower overpressure requires larger tire dimensions and weight. The goal of this research is to find the way to decrease the overpressure in a standard tire in order to increase its durability, while preserving or increasing its load-capacity and retaining the same geometric characteristics. This paper presents a new construction solution that consists of a standard (outer) tire and a smaller (inner) tire inserted in the standard one. This set of tires creates a unique kinetic energy absorption system that occurs when the aircraft lands in direct contact with the runway. During the aircraft hard landing, a large deformation of the tire occurs, i.e., the tire surface is drawn inward both in the cross-section and in the longitudinal section. In this case, the whole weight of the airplane is directed on the tire-shoulder, meaning that the actual contact surface is small. In the new solution, the inner tire prevents the standard tire from drawing inward and keeps it in contact with the runway during tire deflection. A comparative analysis of the change in deflection, track width, and stress distribution of a standard tire and a set of tires in the new solution is performed. It was shown that the new construction solution increases the tire track width by about 8 % and, therefore, the greater contact area between the tires and the runway. In addition, tire stress is decreased by about 40 %; therefore, it has higher tire durability, as well as the ability to absorb more kinetic energy by 56 % compared to a standard tire.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80024748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study for the Nanofinishing of an EN-31 Workpiece with Pulse DC Power Supply Using Ball-End Magnetorheological Finishing 脉冲直流电源对EN-31工件进行球端磁流变纳米加工的研究

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2020-07-15 DOI: 10.5545/sv-jme.2020.6681

Himmat Singh, M. Niranjan, Reeta Wattal

{"title":"A Study for the Nanofinishing of an EN-31 Workpiece with Pulse DC Power Supply Using Ball-End Magnetorheological Finishing","authors":"Himmat Singh, M. Niranjan, Reeta Wattal","doi":"10.5545/sv-jme.2020.6681","DOIUrl":"https://doi.org/10.5545/sv-jme.2020.6681","url":null,"abstract":"Ball-end magnetorheological finishing (BEMRF) is a high-level nanofinishing process used in finishing different kinds of surfaces including flat, 2and 3-dimensional, and curved surfaces. In the present study, a pulse DC power supply is used to energize the electromagnet of magnetorheological (MR) finishing tool. The experiments have been conducted on EN-31 flat workpiece surface with and without pulse DC power supply using a magnetizing current (MC) 2.5 A, a working gap (WG) of 1.5 mm and a rotational speed of the tool (RST) of 500 rpm with a feed rate of workpiece of 50 mm/min. The study has been carried out to analyse the effect of the duty cycle on the response percentage reduction in surface roughness. It has been observed that an improved response percentage reduction in surface roughness has been found with pulsating DC power supply as compared to the response percentage reduction in surface roughness obtained with DC power supply without pulse at the same process parameters. After conducting the preliminary experiments, the statistical analysis was done to analyse the effect of various process parameters on the response percentage reduction in surface roughness using response surface methodology (RSM) at 0.16 duty cycle.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2020-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78245311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2