期刊文献+
共找到1,629篇文章
< 1 2 82 >
每页显示 20 50 100
CUTTING TEMPERATURE MEASUREMENT IN HIGH-SPEED END MILLING 被引量:8
1
作者 全燕鸣 林金萍 王成勇 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2005年第1期47-51,共5页
A computer aided measurement system is used to measure the cutting temperature directly in high-speed machining by natural thermocouples and standard thermocouples. In this system the tool/workpiece interface temperat... A computer aided measurement system is used to measure the cutting temperature directly in high-speed machining by natural thermocouples and standard thermocouples. In this system the tool/workpiece interface temperature is measured by the tool/workpiece natural thermocouple, while the temperature distribution on the workpiece surface and that of interior are measured by some standard thermocouples prearranged at proper positions. The system can be used to measure cutting temperature in the machining with the rotary cutting tools, such as vertical drill and end milling cutter. It is practically used for the research on high-speed milling with hardened steel. 展开更多
关键词 high-speed milling end milling cutter cutting temperature THERMOCOUPLE
下载PDF
New Cutting Force Modeling Approach for Flat End Mill 被引量:9
2
作者 WAN Min ZHANG Wei-hong TAN Gang QIN Guo-hua 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2007年第3期282-288,共7页
A new mechanistic cutting force model for flat end milling using the instantaneous cutting force coefficients is proposed. An in-depth analysis shows that the total cutting forces can be separated into two terms: a no... A new mechanistic cutting force model for flat end milling using the instantaneous cutting force coefficients is proposed. An in-depth analysis shows that the total cutting forces can be separated into two terms: a nominal component independent of the runout and a perturbation component induced by the runout. The instantaneous value of the nominal component is used to calibrate the cutting force coefficients. With the help of the perturbation component and the cutting force coefficients obtained above, the cutter runout is identified. Based on simulation and experimental results, the validity of the identification approach is demonstrated. The advantage of the proposed method lies in that the calibration performed with data of one cutting test under a specific regime can be applied for a great range of cutting conditions. 展开更多
关键词 RUNOUT cutting force flat end mill CALIBRATION cutting force coefficient
下载PDF
Theoretical modeling of cutting temperature in high-speed end milling process for die/mold machining 被引量:4
3
作者 YingTang 《Journal of University of Science and Technology Beijing》 CSCD 2005年第1期90-95,共6页
A parametric model of cutting temperature generated in end milling process is developed according to the thermal mechanism of end milling as an intermittent operation, which periodically repeats the cycle of heating u... A parametric model of cutting temperature generated in end milling process is developed according to the thermal mechanism of end milling as an intermittent operation, which periodically repeats the cycle of heating under cutting and cooling under non-cutting. It shows that cutting speed and the tool-workpiece engagement condition are determinative for tool temperature in the operation. The suggested model was investigated by tests of AlTiN coated endmill machining hardened die steel JIS SKD61, where cutting temperature on the flank face of tool was measured with an optical fiber type radiation thermometer. Experimental results show that the tendency of cutting temperature to increase with cutting speed and engagement angle is intensified with the progressing tool wear. 展开更多
关键词 end milling cutting temperature intermittent cutting die/mold machining
下载PDF
New Mathematical Method for the Determination of Cutter Runout Parameters in Flat-end Milling 被引量:2
4
作者 GUO Qiang SUN Yuwen +1 位作者 GUO Dongming ZHANG Chuantai 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2012年第5期947-952,共6页
The cutting force prediction is essential to optimize the process parameters of machining such as feed rate optimization, etc. Due to the significant influences of the runout effect on cutting force variation in milli... The cutting force prediction is essential to optimize the process parameters of machining such as feed rate optimization, etc. Due to the significant influences of the runout effect on cutting force variation in milling process, it is necessary to incorporate the cutter runout parameters into the prediction model of cutting forces. However, the determination of cutter runout parameters is still a challenge task until now. In this paper, cutting process geometry models, such as uncut chip thickness and pitch angle, are established based on the true trajectory of the cutting edge considering the cutter runout effect. A new algorithm is then presented to compute the cutter runout parameters for flat-end mill utilizing the sampled data of cutting forces and derived process geometry parameters. Further, three-axis and five-axis milling experiments were conducted on a machining centre, and resulting cutting forces were sampled by a three-component dynamometer. After computing the corresponding cutter runout parameters, cutter forces are simulated embracing the cutter runout parameters obtained from the proposed algorithm. The predicted cutting forces show good agreements with the sampled data both in magnitude and shape, which validates the feasibility and effectivity of the proposed new algorithm of determining cutter runout parameters and the new way to accurately predict cutting forces. The proposed method for computing the cutter runout parameters provides the significant references for the cutting force prediction in the cutting process. 展开更多
关键词 flat end milling cutter runout cutting force five-axis machining
下载PDF
Prediction and optimization of end milling process parameters of cast aluminium based MMC 被引量:3
5
作者 R.AROKIADASS K.PALANIRADJA N.ALAGUMOORTHI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第7期1568-1574,共7页
The machining characteristics of LM25 Al/SiCp composite using end milling was investigated.A comprehensive mathematical model was developed for correlating the interactive and higher order influences of various proces... The machining characteristics of LM25 Al/SiCp composite using end milling was investigated.A comprehensive mathematical model was developed for correlating the interactive and higher order influences of various process parameters on the dominant machining criteria,i.e.the tool flank wear phenomena,through response surface methodology,utilizing relevant experimental data obtained through experimentation.Experimental plan was performed by a standard response surface methodology design called a central composite design(CCD).The results of analysis of variance(ANOVA)indicate that the proposed mathematical model can adequately describe the performance within the limits of the studied factors.Optimal combination of these parameters can be used to achieve the minimum tool flank wear. 展开更多
关键词 end milling metal matrix composite(MMC) response surface methodology OPTIMIZATION
下载PDF
Efficient and Stable Optimization of Multi‑pass End Milling Using a Cloud Drop‑Enabled Particle Swarm Optimization Algorithm 被引量:1
6
作者 CAI Xulin YANG Wenan HUANG Chao 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2021年第3期462-473,共12页
Optimization of machining parameters is of great importance for multi-pass end milling because machining parameters adversely or positively affect the time and quality of production.This paper develops a second-order ... Optimization of machining parameters is of great importance for multi-pass end milling because machining parameters adversely or positively affect the time and quality of production.This paper develops a second-order fulldiscretization method(2ndFDM)-based 3-D stability prediction model for simultaneous optimization of spindle speed,axial cutting depth and radial cutting depth.The optimal machining parameters in each pass are obtained to achieve the minimum production time comprehensive considering constraints of 3-D stability,machine tool performance,tool life and machining requirements.A cloud drop-enabled particle swarm optimization(CDPSO)algorithm is proposed to solve the developed machining parameter optimization,and 13 benchmark problems are used to evaluate CDPSO algorithm.Numerical results show that CDPSO algorithm has a certain advantage in computational cost as well as comparable search quality and robustness.A demonstrative example is provided. 展开更多
关键词 machining parameter multi-pass end milling chatter stability particle swarm optimization(PSO) cloud model
下载PDF
Study on End Milling Generation Surface Model and Simulation in View of Main Axle's Tolerance
7
作者 LI Shi-jie, LIU Riu-su, ZHANG Ai-jun (Department of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期39-,共1页
In accordance with the relative movement between end-milling cutter and workpiece surface, a theoretical generation model for milled surface was established with the movement error of principal axle considered. Then t... In accordance with the relative movement between end-milling cutter and workpiece surface, a theoretical generation model for milled surface was established with the movement error of principal axle considered. Then the milled surfaces under various cutting condition were simulated, the results of which showed that end milled surfaces were of "vaulted profile", heights of surface irregularty at various points to be different with maximum value in the middle and smaller at both sides, the difference were determined by diameter of milling cutter, feeding speed, ratio between the diameter of milling cutter and teeth point curve radius and width of workpiece. The study results can be applied to quality prediction of milled surfaces for precision and/or super precision milling operation. 展开更多
关键词 end milling milled surface generation model SIMULATION vaulted profile
下载PDF
The Extraction Method of Cutting Engagement in Ball-end Milling Simulation
8
作者 LIU Yin, ZHENG Li, LI Zhi-zhong (The Dept. of Industrial Engineering, Tsinghua University, Beijing 100 084, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期87-88,共2页
Ball-end mill is widely used in workpiece processi ng with free-form surfaces. Such models that can predict processing character istics precisely are very necessary to the aim of cost reducing, quality improvi ng and ... Ball-end mill is widely used in workpiece processi ng with free-form surfaces. Such models that can predict processing character istics precisely are very necessary to the aim of cost reducing, quality improvi ng and productivity progressing, the cutting force prediction is the most import ant among these models. To explore the physical essence of metal cutting, model researchers commonly simplify the geometric conditions in cutting process, and a ssume that the geometric parameters that are needed to solve the physical models have already been predefined, so it results in the separation between model res earch and practical application. In this paper, for the representative cutting f orce models of ball end milling, a new extraction method of geometric parameters is suggested, which makes it possible for physical model to actually serve for the practical manufacturing, and take in the inspection of real production. 展开更多
关键词 milling simulation ball-end milling cutting en gagement solid model
下载PDF
Heat regulating strategy in numerical control end milling for hard metal machining
9
作者 YingTang YoshiakiKakino 《Journal of University of Science and Technology Beijing》 CSCD 2005年第2期187-191,共5页
The trend in die/mold manufacturing at present is towards the hard machining at high speed to replace the electron dis- charge machining. Failure forms of the AlTiN-coated micro-grain carbide endmill when used for th... The trend in die/mold manufacturing at present is towards the hard machining at high speed to replace the electron dis- charge machining. Failure forms of the AlTiN-coated micro-grain carbide endmill when used for the machining of JIS SKD61 (HRC 53), a widely used material in die/mold manufacturing, are investigated. The endmill shows a characteristic that tool life decreases greatly due to the chipping when overload occurs or the rapid increase of wear when over-heat accumulation in cutting edges. As a consequence of the investigation, a strategy to regulate heat generation in the end milling process is proposed. This is accomplished by controlling the cutting arc length, i.e. the length of each flute engaging workpiece in a cutting cycle. Case studies on the slot end milling and comer rounding are conducted. The results show that the proposed strategy suggests the optimal tool path as well as the optimal pitch between successive tool paths under the cutting time criterion. 展开更多
关键词 heat generation: end milling hard metal machining numerical control
下载PDF
Analysis of Cutting Force by End Milling Using Artificial ntelligence
10
《Journal of Mechanics Engineering and Automation》 2013年第8期517-521,共5页
The cutting forces during end milling process by using Genetic Algorithm are investigated in this paper. However, automated CNC (computer numerical control) programming by milling machine is intended to use for spec... The cutting forces during end milling process by using Genetic Algorithm are investigated in this paper. However, automated CNC (computer numerical control) programming by milling machine is intended to use for special required conditions of programming of tool path length, and analysis of cutting force and optimization of main parameters are presented. Some effective simplification of automated programming is done for cutting force. The cutting force is modelled and analyzed into mathematical simulations in order to optimize the main cutting parameters, also in this case tool path length, it is get as free trajectory. Optimization is carried out by using the Matlab/Genetic Algorithm method that excessively reduce the time and to optimize the main cutting parameters of machining. The number of experiments, measurements and results of cutting force (F~), are presented in 3D as well as in tables. In order to verify the accuracy of the 3 D simulation with optimization method, the results are compared in experimental and theoretical way. In other word, these results indicate directly that the optimized parameters are capable of machining the workpiece. Achieved results that are presented in this paper may in general help the new researcher as well as manufacturing industries of metal cutting. 展开更多
关键词 Cutting force CNC machine end milling Genetic Algorithm.
下载PDF
Investigation of Cutting Force by End Milling Operation
11
《Journal of Mechanics Engineering and Automation》 2014年第1期91-95,共5页
In this work, the cutting forces by end milling operation are analyzed. Therefore, the main parameters of cutting force as cutting speed, feed rate and depth of cut also are investigated in our case. The cutting force... In this work, the cutting forces by end milling operation are analyzed. Therefore, the main parameters of cutting force as cutting speed, feed rate and depth of cut also are investigated in our case. The cutting force is modelled and analyzed into mathematical Wolfram simulations in order to compare the results and in the same time achieve the best solutions. Theoretical results are carried out by using the regression method that required fulfilling the critter by Fisher. The number of experiment, measurements and results of cutting force are presented in 2D as well as 3D. In order to verify the accuracy of the 2D diagram, the results for our case is used both two way such as experimental and theoretical method as well as results are compared. In other hands, these results indicate directly that the optimized parameters are capable of machining the workpiece. The obtained measurement results are compared with theoretical methods in Wolfram software. 展开更多
关键词 Cutting force CNC (computer numerical control) machine tools end milling.
下载PDF
Analysis and correction of the machining errors of small plastic helical gears by ball-end milling
12
作者 Gao Sande Huang Loulin and Han Baoling 《Computer Aided Drafting,Design and Manufacturing》 2012年第1期61-65,共5页
Many small-size precise plastic helical involutes gears are used in electrical appliances to transmit rotary movements con- tinuously and smoothly. Ball-end milling is an effective method for trial manufacture or smal... Many small-size precise plastic helical involutes gears are used in electrical appliances to transmit rotary movements con- tinuously and smoothly. Ball-end milling is an effective method for trial manufacture or small batch production of this type of gear, but the precision of the gear is usually low. In this research, the main sources of the errors of the gear, machining errors of the tooth profile and trace of the gear obtained were analyzed. The correction amounts for these errors are then determined by using a CNC gear tester. They are used to generate a new 3D-CAD model for gear machining with better nrecision. 展开更多
关键词 small plastic helical gear CAD/CAM ball-end milling machining error CNC gear tester error correction
下载PDF
Online tool-wear measurement of small-diameter end mills based on machine vision 被引量:1
13
作者 袁巍 张之敬 +1 位作者 金鑫 刘冰冰 《Journal of Beijing Institute of Technology》 EI CAS 2011年第2期216-220,共5页
The objective of this study was to develop an online tool-wear-measurement scheme for small diameter end-mills based on machine vision to increase tool life and the production efficiency. The geometrical features of w... The objective of this study was to develop an online tool-wear-measurement scheme for small diameter end-mills based on machine vision to increase tool life and the production efficiency. The geometrical features of wear zone of each end mill were analyzed, and three tool wear criterions of small-diameter end mills were defined. With the uEye camera, macro lens and 3-axis micro milling machine, it was proved the feasibility of measuring flank wear with the milling tests on a 45# steel workpiece. The design of experiment (DOE) showed that Vc was the most remarkable effect factor for the flank wear of small-diameter end mill. The wear curve of the experiments of milling was very similar to the Taylor curve. 展开更多
关键词 tool wear end-mills machine vision small diameter flank wear
下载PDF
Experimental Investigation in Micro Bali-End Milling of Hardened Steel 被引量:1
14
作者 Berenger Escolle Michael Fontaine Alexandre Gilbin Sebastien Thibaud Philippe Picart 《材料科学与工程(中英文A版)》 2015年第9期319-330,共12页
关键词 加工试验 淬硬钢 端铣 涂层硬质合金 固化条件 表面完整性 动力学行为 工具钢
下载PDF
A simplified method for local tool interference detection and tool position modification during five-axis ball-end milling process
15
作者 ZHANG Song 张松 LI Bin-xun 《Journal of Chongqing University》 CAS 2018年第4期155-161,共7页
Five-axis ball-end milling is commonly used to machine the complex surfaces. Local tool interference phenomenon which often occurs in five-axis milling should be urgently solved. In this paper, a simplified method to ... Five-axis ball-end milling is commonly used to machine the complex surfaces. Local tool interference phenomenon which often occurs in five-axis milling should be urgently solved. In this paper, a simplified method to detect the occurrence of local tool interference and modify tool position is proposed. First, the detection matrix is established to detect local tool interference at all the cutter location points on tool path simultaneously in five-axis ball-end milling of complex surfaces. The algorithm of detection matrix based on point arithmetic is simple. Secondly, the new coordinates of the modified interfering-free points are obtained precisely by using the genetic algorithm. The feasibility of the method is validated by simulation in Matlab. This research is benefit to simplify the calculation of local tool interference detection and tool position modification. 展开更多
关键词 LOCAL TOOL interference DETECTION TOOL position modification ball-end millING CUTTER
下载PDF
Study on High-Performance Computing for Simulation of End Milling Force
16
作者 ZHANG Zhi-hai, ZHENG Li, LI Zhi-zhong, LIU Da-cheng, ZHAN G Bo-peng (Department of Industry Engineering, Tsinghua University, Beijing 1000 84, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期183-184,共2页
Milling Process Simulation is one of the important re search areas in manufacturing science. For the purpose of improving the prec ision of simulation and extending its usability, numerical algorithm is more and more ... Milling Process Simulation is one of the important re search areas in manufacturing science. For the purpose of improving the prec ision of simulation and extending its usability, numerical algorithm is more and more used in the milling modeling areas. But simulative efficiency is decreasin g with increase of its complexity. As a result, application of the method is lim ited. Aimed at above question, high-efficient algorithm for milling process sim ulation is studied. It is important for milling process simulation’s applicatio n. Parallel computing is widely used to solve the large-scale computation question s. Its advantages include system flexibility, robust, high-efficient computing capability and high ratio of performance to price. With the development of compu ter network, utilizing the computing resource in the Internet, a virtual computi ng environment with powerful computing capability can be consisted by microc omputers, and the difficulty of building hardware environment which is used to s upport parallel computing is reduced. How to use network technology and parallel algorithm to improve simulative effic iency for milling forces simulation is investigated in the paper. In order to pr edict milling forces, a simplified local milling forces model is used in the pap er. End milling cutter is assumed to be divided by r number of differential elem ents along the axial direction of the cutter. For a given time, the total cuttin g forces can be obtained by summarizing the resultant cutting force produced by each differential cutter disc. Divide the whole simulative time into some segmen ts, send these program’s segments to microcomputers in the Internet and obtain the result of the program’s segments, all of the result of program’s segments a re composed the final result. For implementing the algorithm, a distributed Parallel computing framework is de signed in the paper. In the framework, web server plays a role of controller. Us ing Java RMI(remote method interface), the computing processes in computing serv er are called by web server. There are lots of control processes in web server a nd control the computing servers. The codes of simulative algorithm can be dynam ic sent to the computing servers, and milling forces at the different time are c omputed through utilizing the local computer’s resource. The results that are ca lculated by every computing servers are sent to the web server, and composed the final result. The framework can be used by different simulative algorithm. Comp ared with the algorithm running single machine, the efficiency of provided algor ithm is higher than that of single machine. 展开更多
关键词 end-milling force model SIMULATION high-perfo rmance computing parallel algorithm Java RMI
下载PDF
Cutting force signal pattern recognition using hybrid neural network in end milling
17
作者 Song-Tae SEONG Ko-Tae JO Young-Moon LEE 《中国有色金属学会会刊:英文版》 CSCD 2009年第B09期209-214,共6页
Under certain cutting conditions in end milling, the signs of cutting forces change from positive to negative during a revolution of the tool. The change of force direction causes the cutting dynamics to be unstable w... Under certain cutting conditions in end milling, the signs of cutting forces change from positive to negative during a revolution of the tool. The change of force direction causes the cutting dynamics to be unstable which results in chatter vibration. Therefore, cutting force signal monitoring and classification are needed to determine the optimal cutting conditions and to improve the efficiency of cut. Artificial neural networks are powerful tools for solving highly complex and nonlinear problems. It can be divided into supervised and unsupervised learning machines based on the availability of a teacher. Hybrid neural network was introduced with both of functions of multilayer perceptron (MLP) trained with the back-propagation algorithm for monitoring and detecting abnormal state, and self organizing feature map (SOFM) for treating huge datum such as image processing and pattern recognition, for predicting and classifying cutting force signal patterns simultaneously. The validity of the results is verified with cutting experiments and simulation tests. 展开更多
关键词 切削力信号 混合神经网络 模式识别 铣床 人工神经网络 切削条件 信号监测 监督学习
下载PDF
Heat Resistant Properties of Some Elements-Incorporated Diamond-Like Carbon Films and Their Trial Applications for Micro End Mill Coatings
18
作者 Chavin Jongwannasiri Nutthanun Moolsradoo Shuichi Watanabe 《Materials Sciences and Applications》 2015年第1期9-15,共7页
In this article, the results obtained from a study carried out on the some elements-incorporated diamond-like carbon (DLC) films are reported. All the films were deposited using plasma-based ion implantation (PBII) te... In this article, the results obtained from a study carried out on the some elements-incorporated diamond-like carbon (DLC) films are reported. All the films were deposited using plasma-based ion implantation (PBII) technique. The deposited films were annealed at 400℃, 650℃ and 900℃ in an air atmosphere for 1 hour. The effects of adding hydrogen, silicon/oxygen and silicon/nitrogen into the DLC film on chemical composition, friction coefficient and corrosion resistance were investigated. The films coated micro end mills performance was also assessed. The results indicate that all the films showed almost constant atomic contents of C, Si, O and N until annealing at 400℃. However, the films were completely destroyed at 650℃ with the increased Si and O contents, while the C content decreased. The incorporation of silicon/oxygen and silicon/nitrogen into the DLC exhibited lower values of friction coefficients than the hydrogenated DLC (DLC and H-DLC) before and after annealing at 400℃, whereas all the films presented the same values of friction coefficients after annealing at 650℃ due to the completely destroy of the films. Furthermore, the incorporation of silicon/nitrogen into the DLC also exhibited better corrosion resistance and unbroken micro end mills performance on their surfaces. Thus, the incorporation of silicon/nitrogen into the DLC film can be considered beneficial in improving the micro end mills performance. 展开更多
关键词 CUTTING Tools DIAMOND-LIKE Carbon Micro end millS
下载PDF
Tool feed rate optimization for smoothening of cutting force in end milling
19
作者 Yuji NINOMIYA Hisataka TANAKA +2 位作者 Masahiko SATO Susumu OKAMURA Kazuma TERASHIMA 《材料与冶金学报》 CAS 2010年第4期296-299,共4页
下载PDF
A novel approach to minimizing material loss for computer numerical control flank-regrinding of worn end mills
20
作者 Liming WANG Yang FANG +1 位作者 Jianping YANG Jianfeng LI 《Frontiers of Mechanical Engineering》 SCIE CSCD 2023年第3期219-231,共13页
Flanks of end mills are prone to wear in a long machining process.Regrinding is widely used in workshops to restore the flank to an original-like state.However,the traditional method involves material waste by trial a... Flanks of end mills are prone to wear in a long machining process.Regrinding is widely used in workshops to restore the flank to an original-like state.However,the traditional method involves material waste by trial and error and dramatically decreases the potential regrinding.Moreover,over-cut would happen to the flutes of worn cutters in the regrinding processes because of improper wheel path.This study presented a new approach to planning the wheel path for regrinding worn end mills to minimize material loss and recover the over-cut.In planning,a scaling method was developed to determine the maximum size of the new cutter according to the similarity of cutter shapes before and after regrinding.Then,the wheel path is first generated by envelope theory to regrind the worn area with a four-axis computer numerical control grinder according to the new size of cutters.Moreover,a second regrinding strategy is applied to recover the flute shape over-cut in the first grinding.Finally,the proposed method is verified by an experiment.Results showed that the proposed approach could save 25%of cutter material compared with the traditional method and ensure at least three regrinding times.This work effectively provides a general regrinding solution for the worn flank with maximum material-saving and regrinding period. 展开更多
关键词 flank-regrinding worn end mill wheel position and orientation material loss over-cut
原文传递
上一页 1 2 82 下一页 到第
使用帮助 返回顶部