Strojniski Vestnik-Journal of Mechanical Engineering最新文献_第7页

Rapid and Automatic Zero-Offset Calibration of a 2-DOF Parallel Robot Based on a New Measuring Mechanism 基于新型测量机构的二自由度并联机器人零偏移快速自动标定

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-11-30 DOI: 10.5545/SV-JME.2017.4529

J. Mei, Jiawei Zang, Yabin Ding, Shenglong Xie, Xu Zhang

引用次数: 5

A Novel Axial Modification and Simulation Analysis of Involute Spur Gear 渐开线直齿齿轮轴向修形及仿真分析

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-11-30 DOI: 10.5545/SV-JME.2017.4307

Ningning Wang, Xueyi Li, Kun Wang, Q. Zeng, X. Shen

{"title":"A Novel Axial Modification and Simulation Analysis of Involute Spur Gear","authors":"Ningning Wang, Xueyi Li, Kun Wang, Q. Zeng, X. Shen","doi":"10.5545/SV-JME.2017.4307","DOIUrl":"https://doi.org/10.5545/SV-JME.2017.4307","url":null,"abstract":"The transmission of spur gear mechanism may generate uneven load distribution because of machining error, assembly error, elastic deformation, and other factors, resulting in serious damage to the bearing capacity and service life of gears. To improve the contact condition of gear pairs and enhance the meshing performance and bearing capacity, this study proposed a novel axial modification method based on a composite modification curve with indefinite parameters and an evaluation method to evaluate modification effects. In addition to the surface equation of modified tooth was derived according to the composite modification curve, and the finite element model was built for gear pair. After conducting simulation analysis for the meshing process, the location and the shape of contact area as well as the other results can be acquired. In addition, the modification parameters can be optimized by performing orthogonal experiments for modified gear pairs; thus, the ideal modification effect is obtained at a specific operating condition. Moreover, comparison analysis was performed, and the results show that the phenomenon of uneven load distribution is dramatically improved when the gear pair was modified with optimized parameters, and the bearing capacity of the gear pair was increased. Finally, using the optimized parameters to trial-produce gears and conducting running-in tests, the effectiveness and the practicability of the method proposed in this study were verified.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2017-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80246509","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: 7

A Novel Excitation Approach to Ultrasonically-Assisted Cylindrical Grinding 超声辅助外圆磨削的一种新的激励方法

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-11-30 DOI: 10.5545/SV-JME.2016.4196

V. Ostaševičius, V. Jūrėnas, A. Vilkauskas, G. Balevicius, A. Senkus, E. Jotautienė

引用次数: 1

Hysteresis Modeling and Compensation of Pneumatic Artificial Muscles using the Generalized Prandtl-Ishlinskii Model 基于广义Prandtl-Ishlinskii模型的气动人工肌肉滞回建模与补偿

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-10-30 DOI: 10.5545/SV-JME.2017.4491

J. Mei, Shenglong Xie, Hai-tao Liu, Jiawei Zang

引用次数: 9

Chip Fragmentation in the Milling of AZ91HP Magnesium Alloy AZ91HP镁合金铣削过程中切屑破碎的研究

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-10-30 DOI: 10.5545/SV-JME.2017.4406

J. Kuczmaszewski, I. Zagórski, Olga Gziut, S. Legutko, G. Królczyk

{"title":"Chip Fragmentation in the Milling of AZ91HP Magnesium Alloy","authors":"J. Kuczmaszewski, I. Zagórski, Olga Gziut, S. Legutko, G. Królczyk","doi":"10.5545/SV-JME.2017.4406","DOIUrl":"https://doi.org/10.5545/SV-JME.2017.4406","url":null,"abstract":"This paper presents new approaches to safety assessment in the milling of magnesium alloy. The objective of the study is to determine the effect of milling parameters and end mill geometry on machining safety, defined as the minimum probability of chip self-ignition. The assessment of safety and effectiveness in the milling of magnesium must include analysis of chip fractions formed during the milling process. The paper presents the state of the art of magnesium alloy machinability in terms of chip formation (chip fragmentation). Furthermore, the paper investigates the correlation between the quantity of distinguished chip fractions and variations in the parameters vc and fz as well as in the rake angle γo. In addition, the results of the dimensions of individual chip fractions are reported. The study was conducted on AZ91HP magnesium cast alloy, and the milling process was performed using carbide tools with varying rake angles (γo = 5o and γo = 30o). It has been found that chip fragmentation increases by increasing the above parameters, i.e. the feed rate fz and the cutting speed vc. The observed chip fragmentation (the quantity of chip fractions) is lower at the tool rake angle γo = 30o. Finally, technological recommendations are formulated based on the quantity of chip fractions generated at particular settings. The results do not unequivocally demonstrate that chip dimensions increase or decrease by increasing the operational parameters of the milling process. In terms of their application, it is vital that machining processes be simultaneously effective and safe.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2017-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82319554","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: 13

The Effects of Milling Strategies on Forces, Material Removal Rate, Tool Deflection, and Surface Errors for Rough Machining of Complex Surfaces 铣削策略对复杂表面粗加工的力、材料去除率、刀具偏转和表面误差的影响

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-10-30 DOI: 10.5545/SV-JME.2017.4450

E. Bagci, Ercument Ugur Yuncuoglu

{"title":"The Effects of Milling Strategies on Forces, Material Removal Rate, Tool Deflection, and Surface Errors for Rough Machining of Complex Surfaces","authors":"E. Bagci, Ercument Ugur Yuncuoglu","doi":"10.5545/SV-JME.2017.4450","DOIUrl":"https://doi.org/10.5545/SV-JME.2017.4450","url":null,"abstract":"The high-performance machining of curved surfaces is a highly critical process that is crucial in modern engineering applications. Different methodologies and CAM tools have been developed by manufacturers to improve the efficiency of the sculptured surface milling. The determination of appropriate tool path strategies and milling conditions is crucial in ensuring a high productivity rate, meeting the bettersurface texture values, and lower cutting forces, tool deflection, and surface errors. The objective of this research is to analyse the effect oftool path strategies on dynamic tool deflection, cutting forces, machining time, effective cutter diameter (ECD), cutter/workpiece engagement (CWE) area, instantaneous material removal rate (IMRR), and machining errors in rough machining of a sculptured surface. The B-rep solid modeling-based simulation and the optimization system were developed and integrated with the commercial CAD/CAM software for 3-axis ball-end milling. The experimental results clearly show the influence of the cutter path strategies on machining times and their importance for reducing time needed and, consequently, costs. It was observed that the profiles of deflection, IMRR values, cutting forces, machining errors and ECD values match very well for cutting strategies. Machining strategies employed include various degrees of zig-zag, profiling, and spiral. The conclusion is that the 90° zig-zag strategy provokes the lowest cutting forces, tool deflection, and surface error values. The in-house NC simulation system performed well in determining values and the location of milling form errors on the surface.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2017-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74809509","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: 17

Analysis of Criteria for Determining a TNT Equivalent 确定TNT当量标准的分析

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-10-30 DOI: 10.5545/SV-JME.2016.4230

R. Panowicz, M. Konarzewski, Michał Trypolin

引用次数: 11

Bolted Connection of an End-Plate Cantilever Beam: The Distribution of Operating Force 端板悬臂梁的螺栓连接:作用力的分布

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-10-30 DOI: 10.5545/SV-JME.2017.4638

S. Oman, M. Nagode

{"title":"Bolted Connection of an End-Plate Cantilever Beam: The Distribution of Operating Force","authors":"S. Oman, M. Nagode","doi":"10.5545/SV-JME.2017.4638","DOIUrl":"https://doi.org/10.5545/SV-JME.2017.4638","url":null,"abstract":"This paper presents an alternative method for calculating the operating forces on bolts in the bolted connections of the end-plate cantilever beams. Since operating force reduces pressure between the joined surfaces the influence of the operating force needs to be considered when determining the clamping force. Therefore, correctly defined operational force on each bolt is a base for all further calculations. \u0000To evaluate proposed method, results of four existing analytical methods for calculating the operating forces in the bolted connections of the end-plate cantilever beams are compared with the results of the alternative method and the results gained by finite element analyses. Because finite element analysis take into account all influential parameters it is expected that the results obtained by finite element analyses are a good approximation to reality and can serve as a reference when comparing different analytical methods. It turns out that the results of the proposed method coincide with the results of finite element analyses the most. Only the proposed method correctly determines which bolts in the connection are subjected to the highest additional loads.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2017-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87597617","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: 9

Determining Focusing Nozzle Wear by Measuring AWJ Diameter 通过测量AWJ直径确定聚焦喷嘴磨损

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-10-10 DOI: 10.5545/SV-JME.2017.4424

Miha Prijatelj, Marko Jerman, H. Orbanić, I. Sabotin, J. Valentinčič, A. Lebar

{"title":"Determining Focusing Nozzle Wear by Measuring AWJ Diameter","authors":"Miha Prijatelj, Marko Jerman, H. Orbanić, I. Sabotin, J. Valentinčič, A. Lebar","doi":"10.5545/SV-JME.2017.4424","DOIUrl":"https://doi.org/10.5545/SV-JME.2017.4424","url":null,"abstract":"Abrasive water jet (AWJ) cutting is a versatile technology, but it is limited by relative poor accuracy. The main problem is the unknown diameter of the jet, as there is no device or instrument on the market that would enable a quick and easy measurement of it. With such an instrument the diameter could be regularly measured, nozzle wear monitored and noted offset adjusted. This would greatly improve the quality control of the process and the accuracy of the cut. This paper investigates the usage of a through-beam laser sensor for monitoring jet diameter and nozzle wear. Experiments were performed with five differently worn nozzles, with two different water pressures, with and without abrasive, at different standoff distances and with varying measuring times. Results show that the instrument is capable of monitoring the jet diameter and nozzle wear with an accuracy of ±0.03 mm, but it is very susceptible to the jet’s spray and abrasive sticking to the sensor’s screens. Jet diameter correlated better with the diameter of the focusing nozzle when taking measurements without the abrasive, at high water pressures and at a standoff distance of 1 mm.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87373513","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

Manufacturing Space Homogeneity in Additive Manufacturing – Electron Beam Melting Case 增材制造中的制造空间均匀性——电子束熔化案例

IF 1.7 4区工程技术

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2017-10-10 DOI: 10.5545/SV-JME.2017.4365

A. Piaget, M. Museau, H. Paris

引用次数: 3