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International Journal of Machining and Machinability of Materials最新文献

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Some investigations on surface quality indicators for OHNS die steel machined with suspended powder EDM process 悬浮粉末电火花加工OHNS模具钢表面质量指标的研究
International Journal of Machining and Machinability of Materials Pub Date : 2020-04-13 DOI: 10.1504/ijmmm.2020.10028420
N. Khedkar, A. Bongale, Satish Kumar, V. Khedkar, D. Kumar
{"title":"Some investigations on surface quality indicators for OHNS die steel machined with suspended powder EDM process","authors":"N. Khedkar, A. Bongale, Satish Kumar, V. Khedkar, D. Kumar","doi":"10.1504/ijmmm.2020.10028420","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10028420","url":null,"abstract":"The study focuses on the evaluation of surface quality characteristics of oil hardened non shrinking die steel surface machined with suspended powder electrical discharge machining process. Pure copper metal is used as an electrode material, and tungsten powder is used as suspended medium for the purpose. Machining experiments were carried out by varying one parameter at a time. After each test, the machined surface is analysed for evaluating its surface roughness and microhardness values. It is found that combination of 4 A gap current, 12 μs pulse on span and 7 μs pulse off span will result in optimum surface quality indicators for the SPEDM process. Also, dry sliding wear experiments were carried out on the machined surface to evaluate the frictional force and coefficient of friction. Spectroscopic analysis and energy dispersive X-ray diffraction analysis on the machined surface indicate a considerable rise in carbon and tungsten content on the recast white layer of the machined surface. Scanning electron microscopic analysis of the machined surface revealed the presence of compounds of tungsten on the recast white layer. Also, micro-cracks were observed on the machined surface which is due to higher gap current setting during EDM process.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48468422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Hybrid Taguchi-GRA-PCA approach for multi-response optimisation of turning process parameters under HPC condition HPC条件下车削工艺参数多响应优化的Taguchi-GRA-PCA混合方法
International Journal of Machining and Machinability of Materials Pub Date : 2020-04-10 DOI: 10.1504/ijmmm.2020.10028424
Prianka B. Zaman, S. Saha, N. R. Dhar
{"title":"Hybrid Taguchi-GRA-PCA approach for multi-response optimisation of turning process parameters under HPC condition","authors":"Prianka B. Zaman, S. Saha, N. R. Dhar","doi":"10.1504/ijmmm.2020.10028424","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10028424","url":null,"abstract":"Process parameter optimisation is important in manufacturing. An effective and efficient manufacturing process offers low temperature, low force and high material removal rate without compromising the product quality. An experimental investigation designed by Taguchi's orthogonal array for turning AISI 1060 steel by uncoated carbide insert under high-pressure coolant (HPC) condition. Since all these aforementioned responses are mutually conflicting, simultaneous multi-response optimisation is required to acquire a trade-off among the responses. Standalone Taguchi method is not sufficient for multi-response optimisation. Grey relational analysis (GRA) can be coupled with Taguchi method to overcome this complexity, where overall process performance index grey relational grade (GRG) is calculated and used for the optimisation of the process by using Taguchi's S/N ratio. Principal component analysis (PCA) can be utilised to determine the individual importance of each response, which facilitate accurate computation of overall GRG. The effect of process parameters on GRG was analysed using analysis of variance (ANOVA). Validation by confirmation test was also performed.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42307599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Fabrication of cascade micropattern by maskless electrochemical micromachining 无掩模电化学微加工制备级联微图案
International Journal of Machining and Machinability of Materials Pub Date : 2020-04-10 DOI: 10.1504/ijmmm.2020.10028413
S. Kunar, B. Bhattacharyya
{"title":"Fabrication of cascade micropattern by maskless electrochemical micromachining","authors":"S. Kunar, B. Bhattacharyya","doi":"10.1504/ijmmm.2020.10028413","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10028413","url":null,"abstract":"Cascade micropattern is the basic complex textured surface, which is generated on different microdevices for various advanced micromanufacturing applications. This paper highlights the experimental analysis into generation of cascade micropatterns on stainless steel (SS 304) by maskless electrochemical micromachining (EMM). The experimental setup consisting of electrode fixtures, EMM cell, power supply unit and electrolyte flow system is indigenously developed for fabrication of cascade micropatterns inexpensively without fabrication of one by one complex microfeature of cascade profile by a single microtool. One textured tool with SU-8 2150 mask can fabricate more than 25 cascade micropatterns. Influences of EMM parameters such as electrolyte concentration, electrolyte flow rate, pulse frequency and inter electrode gap on depth, width overcut and surface roughness (Ra) are studied during generation of cascade micropattern. An attempt has also been done to analysis the micrographs of generated cascade micropattern for investigating the suitable parameter setting. This investigation will be needful and fruitful for machining of need-based cascade micropatterns on microdevices like micromixers, microactuators, microcoolers, etc.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46069218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An approach to residual stress measurement in ball-end milling process on Ti-6Al-4V ELI titanium alloy Ti-6Al-4V ELI钛合金球头铣削残余应力的测量方法
International Journal of Machining and Machinability of Materials Pub Date : 2020-04-10 DOI: 10.1504/ijmmm.2020.107048
J. García-Barbosa, Ernesto Córdoba-Nieto
{"title":"An approach to residual stress measurement in ball-end milling process on Ti-6Al-4V ELI titanium alloy","authors":"J. García-Barbosa, Ernesto Córdoba-Nieto","doi":"10.1504/ijmmm.2020.107048","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.107048","url":null,"abstract":"Evaluation of the residual stress state in a surface, obtained by means of the ball-end milling process, is important to ensure the reliability of the machined product during its life cycle. X-ray diffraction is one of the techniques most commonly used for evaluating residual stresses. A review of the specialised bibliography shows the shortage of a methodology for this type of studies on materials with more than one crystalline phase. In this experimental research for evaluating the state of residual stress in a series of samples machined with a ball-end mill on the Ti-6Al-4V ELI titanium alloy, it was found that they were subject to compressive residual stress. An electropolished surface of the same material was taken as a reference pattern. The X-ray diffraction analyses were carried out on the crystallographic planes {1012} and {1013} of the alpha phase of the alloy.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/ijmmm.2020.107048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44450000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamical analysis for the motorised spindles of machine tools 机床电主轴的动力学分析
International Journal of Machining and Machinability of Materials Pub Date : 2020-04-10 DOI: 10.1504/ijmmm.2020.10028414
Nguyen Ngoc Nam, Sang Do Lee, S. You, P. D. Tung
{"title":"Dynamical analysis for the motorised spindles of machine tools","authors":"Nguyen Ngoc Nam, Sang Do Lee, S. You, P. D. Tung","doi":"10.1504/ijmmm.2020.10028414","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10028414","url":null,"abstract":"The spindle dynamics directly affect the cutting forces, and typically the topography of machined surface of workpieces. In this study, the dynamical behaviours of spindle system are considered in details for accuracy monitoring of CNC machines. Firstly, the rotational model has been established for the spindle with the servo motor. Secondly, the phase portraits of the dynamical models are provided by vector field analysis, depicting rotational behaviours for the spindle operations. In addition, the bifurcation analysis shows that the machining process can be dynamically stable and unstable by changing control parameters. Spindle rotational behaviours are described by the cutting forces which have significant influence on overall machining performance. Finally, it is noted that stability analysis of spindle speed is essential to characterise tool behaviours and machining accuracy while avoiding chattering.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42426763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Increasing productivity in hard turning of steels using CVD-coated carbide 利用cvd涂层硬质合金提高钢的硬车削生产率
International Journal of Machining and Machinability of Materials Pub Date : 2020-04-10 DOI: 10.1504/ijmmm.2020.10028429
A. Ginting, M. Nouari, I. Bencheikh
{"title":"Increasing productivity in hard turning of steels using CVD-coated carbide","authors":"A. Ginting, M. Nouari, I. Bencheikh","doi":"10.1504/ijmmm.2020.10028429","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10028429","url":null,"abstract":"Productivity is the essence of hard machining concept. Many aspects studied in hard machining but still were not dealing directly with productivity. In this study, the strategy dealing with an effort to increase productivity in cutting of hardened steel by utilising a triple-layer TiN/Al2O3/TiCN CVD-coated carbide tool has been developed. The selection of cutting condition, tool life criteria, cutting tool performance, and the quality of surface finish are considered in order to define the productivity parameters material removal rate (MRR) and volume of material removal (VMR). The study shows that the highest VMR of 1,050 cm3 when cutting AISI 1045 (42±1 HRC) and 433.88 cm3 for AISI 4340 (48±1 HRC) are achieved at flank wear (VB) 0.2 mm and surface finish (Ra) at smooth quality (N7-N8). The study also concludes that better tribological behaviour of coating layer(s) provides longer tool life, better surface quality, and higher productivity.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42942604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Forming and finishing surface by sequential electrochemical-electrodischarge machining of precision magnetic optics parts 精密磁光学零件的顺序电化学放电加工成形与精加工
International Journal of Machining and Machinability of Materials Pub Date : 2020-04-10 DOI: 10.1504/ijmmm.2020.10026856
O. Plakhotnyi, V. Osypenko
{"title":"Forming and finishing surface by sequential electrochemical-electrodischarge machining of precision magnetic optics parts","authors":"O. Plakhotnyi, V. Osypenko","doi":"10.1504/ijmmm.2020.10026856","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10026856","url":null,"abstract":"A method for calculating the formation of a hyperbolic ruled surface with wire electrical discharge machining is proposed, considering errors caused by the deflection of wire electrode. The given approach of calculation of technological parameters for further electrochemical dimensional processing with a wire electrode is presented in order to increase reproduction accuracy and improve surface quality. The obtained accuracy and qualitative parameters of manufactured parts satisfy rigorous requirements for magnet pole tips of quadrupole lenses of nuclear microprobes. The latest combined technology of sequential electrodischarge and electrochemical processing with wire electrode in the production of precision parts of magnetic optics, which is given in the article, will be useful to specialists working with processing technologies and precision engineering.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48875737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Optimisation of turning parameters for minimising specific cutting energy with use of different cooling/lubricating techniques 优化车削参数，使用不同的冷却/润滑技术，以最大限度地减少特定的切削能量
International Journal of Machining and Machinability of Materials Pub Date : 2020-02-27 DOI: 10.1504/ijmmm.2020.10027193
D. Cica, B. Sredanović, Saša Tešić, D. Kramar
{"title":"Optimisation of turning parameters for minimising specific cutting energy with use of different cooling/lubricating techniques","authors":"D. Cica, B. Sredanović, Saša Tešić, D. Kramar","doi":"10.1504/ijmmm.2020.10027193","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10027193","url":null,"abstract":"The objective of this paper is optimisation of the machining parameters using the Taguchi method to obtain minimum specific cutting energy. Considering the machining parameters such as speed, depth of cut and feed rate, a series of turning experiments were conducted to measure the main cutting force required to calculate specific cutting energy. The experiments were performed on C45E steel bars using coated carbide inserts under different cooling/lubrication conditions, namely, flooded cooling, minimal quantity lubrication and high pressure cooling. The concept of signal-to-noise ratio was employed to find the optimal levels of the process parameters so as to get the lowest value of specific cutting energy. Analysis of variance was applied to estimate the significance of control factors affecting specific cutting energy. Finally, the results of confirmation experiments with optimal process parameters settings showed that the Taguchi method can be successfully applied in the optimisation of process parameters for minimum specific cutting energy.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42013828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Machining of titanium and titanium alloys by electric discharge machining process: a review 钛及钛合金放电加工工艺综述
International Journal of Machining and Machinability of Materials Pub Date : 2020-02-27 DOI: 10.1504/ijmmm.2020.10027192
Vivudh Gupta, B. Singh, R. Mishra
{"title":"Machining of titanium and titanium alloys by electric discharge machining process: a review","authors":"Vivudh Gupta, B. Singh, R. Mishra","doi":"10.1504/ijmmm.2020.10027192","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10027192","url":null,"abstract":"Electric discharge machining (EDM) process is a non-traditional thermal based machining process which is widely used for the machining of hard materials such as ceramics and super alloys. Titanium (Ti), whose hardness ranges from HRB 70–74, is one such hard material which can be machined by EDM process to create intricate shapes and contours. This review paper presents the contribution of different researchers in machining of titanium and its alloys by EDM process. Problems encountered during machining of Ti and its alloys are also discussed. New research avenues like introduction of abrasives and powder in dielectric fluid, use of hybrid techniques, introduction of cryogenic treatment, etc. to improve the machinability of Ti and its alloys by EDM process are highlighted. Use of modelling and optimisation techniques like Taguchi method, response surface methodology, artificial neural network, grey relational analysis, etc. to predict the behaviour of complex process during electric discharge machining of Ti and its alloys is also shown.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43160851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Influence of vibration on mechanical polishing micro-structured surface using discrete element method 离散元法研究振动对机械抛光微结构表面的影响
International Journal of Machining and Machinability of Materials Pub Date : 2020-01-01 DOI: 10.1504/ijmmm.2020.10025675
G. Wang, Bingrui Lv, Li Liu, B. Liu, Haibo Zhou
{"title":"Influence of vibration on mechanical polishing micro-structured surface using discrete element method","authors":"G. Wang, Bingrui Lv, Li Liu, B. Liu, Haibo Zhou","doi":"10.1504/ijmmm.2020.10025675","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10025675","url":null,"abstract":"A model using discrete element method (DEM) was conducted to simulate vibration assisted mechanical polishing micro-structured surface process by particle flow code in three dimensions (PFC3D). The effect laws of vibration frequency and amplitude on abrasive grains and polishing force were researched in detail according to the simulation results. The effects of vibration on the particles average motion velocity in one fluid cell were researched, and the simulation results show that average velocity increases with increase of vibration frequency and amplitude on the whole. The effects of vibration on the unbalanced force acting on the workpiece surface were quantified at first. The changes of average unbalanced force obviously increase for low feed rate with increase of frequency and increase approximately linearly with increase of amplitude. It is concluded that vibration with high frequency and great amplitude can significantly increase machining efficiency and improve surface quality in micro-structured surface polishing.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66738598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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