scholarly journals Optimization of Grinding Parameters for Minimum Grinding Time When Grinding Tablet Punches by CBN Wheel on CNC Milling Machine

2019 ◽  
Vol 9 (5) ◽  
pp. 957 ◽  
Author(s):  
Ngoc-Pi Vu ◽  
Quoc-Tuan Nguyen ◽  
Thi-Hong Tran ◽  
Hong-Ky Le ◽  
Anh-Tuan Nguyen ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Feed Rate ◽  
Cubic Boron Nitride ◽  
Cutting Parameters ◽  
Wheel Speed ◽  
Milling Machine ◽  
Cnc Milling ◽  
Cutting Depth ◽  
Cnc Milling Machine ◽  
Grinding Time

Cutting regime parameters play an important role in determining the efficiency of the grinding process and the quality of the ground parts. In this study, the influences of the cutting parameters, including the cutting depth (ae), the feed rate (Fe) and the wheel speed (RPM) on the grinding time when grinding tablet shape punches by a cubic boron nitride (CBN) wheel on a CNC (Computerized Numerical Control) milling machine are investigated. The Taguchi technique based on orthogonal array and analysis of variance (ANOVA) was then applied to design the number of experiments and evaluate the influence of cutting depth, feed rate and wheel speed on the grinding time. The results show that among the three cutting parameters, the most influential parameter on the grinding time is the cutting depth. The second influential parameter on the grinding time is the feed rate. The least influential parameter on grinding time is the wheel speed. In addition, the optimal condition of cutting parameters obtained for grinding tablet shape punches by cubic boron nitride wheels on a CNC milling machine are a cutting depth of 0.03 mm, wheel speed of 5000 rpm and feed rate of 3500 mm/min. This optimum cutting parameters ensure the least grinding time.

scholarly journals Investigation on influence of cutting parameters on spindle vibration of CNC wood milling machine

2018 ◽  
Vol 213 ◽  
pp. 01007
Author(s):  
Tran Van Thuy ◽  
Huu Loc Nguyen
Keyword(s):  
Feed Rate ◽  
Vibration Amplitude ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Milling Machine ◽  
Cnc Milling ◽  
Cutting Depth ◽  
Comparison Results ◽  
Milling Machines ◽  
Spindle Vibration

In machining operation, the cutting parameters greatly influences on the spindle vibration of a CNC wood milling machine. The paper presents the effect of the cutting parameters such as feed rate, cutting speed, and cutting depth on the vibration amplitude of the spindle when machined on CNC milling machine using Box-Hunter method of experimentation. The lowest natural frequency of this machine is 250 Hz. Experimental results have established a second-order regression equation that demonstrates the effect of three parameters such as feed rate, cutting speed, and cutting depth on the vibration amplitude of the spindle. From that base, determine the most reasonable cutting parameters when machining on CNC wood milling machines so that the spindle vibration amplitudes is minimal. In addition, The comparison results show that the spindle head vibration amplitude of the machine using the bolt joint is larger than the spindle head vibration amplitude of the machine using the weld joint.

scholarly journals Sustainable Manufacturing and Parametric Analysis of Mild Steel Grade 60 by Deploying CNC Milling Machine and Taguchi Method

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1303
Author(s):  
Shakir Azim ◽  
Sahar Noor ◽  
Qazi Salman Khalid ◽  
Aqib Mashood Khan ◽  
Danil Yurievich Pimenov ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Mild Steel ◽  
Feed Rate ◽  
Sustainable Manufacturing ◽  
Steel Grade ◽  
Spindle Speed ◽  
Depth Of Cut ◽  
Milling Machine ◽  
Cnc Milling ◽  
Cnc Milling Machine

Design and manufacturing are the key steps in the sustainable manufacturing of any product to be produced. Within the perspective of injection molds production, increased competitiveness and repeated changes in the design require a complete optimized manufacturing process. Local and minor improvements in the milling process do not generally lead to an optimized manufacturing process. The goal of the new geometry and parametric analysis of the mould is to reduce the quality issues in mild steel grade 60. In this explicit research, the surface roughness (smoothness) of indigenously produced injection moulds in the local market in Pakistan is investigated. The CNC milling machine (five-axis) is used for the manufacturing of an injection mould, and the Taguchi method of the design of the experiment is applied for parameters optimization. Hence, the overall process is assisted in balancing the milling machine parameters to trim down the surface roughness issue in mild steel moulds and increase their sustainability. The spindle speed (rpm), the depth of cut (mm), and the feed rate (mm/rev) are considered as input variables for process optimization, and the experiments are performed on mild steel grade 60. It is deduced that the combination of a spindle speed of 800 rpm, feed rate of 10 mm/rev and depth of cut of 0.5 mm is the best case in case of minimum surface roughness, which leads to sustainable products. It is also deduced from ANOVA, that the spindle speed is a factor that affects the surface roughness of mild steel products, while the feed rate turns out to be insignificant.

scholarly journals Incremental Sheet Forming (ISF) of AISI 316 Stainless Steel Sheet Using CNC Milling Machine

2014 ◽  
Vol 939 ◽  
pp. 322-327 ◽  
Author(s):  
M. Moayedfar ◽  
Zulkiflle Leman ◽  
B.T. Hang Tuah bin Baharudin
Keyword(s):  
Stainless Steel ◽  
Sheet Metal ◽  
Feed Rate ◽  
Steel Sheet ◽  
Incremental Sheet Forming ◽  
Spindle Speed ◽  
Milling Machine ◽  
Cnc Milling ◽  
Stainless Steel Sheet ◽  
Cnc Milling Machine

Incremental sheet forming (ISF) is a method to form a sheet metal into desired shape and surface features in a batch production series. This method includes forming a clamped sheet metal in controlled conditions by a CNC milling machine, lathe machine or a robot. In this study, the effects of forming parameters on the amount of stretch in stainless steel sheet using a CNC milling machine have been investigated. A ball-point shaped tool made of a bronze alloy was fabricated and used throughout the experiments. The tool acted as the indenter that formed the stainless steel sheet into a small pyramid-like shape. The results showed that as the spindle speed and feed rate increased, the amount of sheet stretch also increased, up to a point where the sheet could not stretch anymore and the process changed from forming to shear thinning and chipping. In addition, the surface quality of the part was badly affected at higher spindle speed and feed rate settings. The temperature of the lubrication oil was also measured during the process and the maximum temperature recorded was 45°C which remained constant until the end of the process. In conclusion, to obtain a good quality part while increasing the productivity of ISF, the optimized values of the feed rate and spindle speed in this work were found to be at 500 mm/min and 1000 rpm respectively.

scholarly journals Experimental Studying of the Variations of Surface Roughness and Dimensional Accuracy in Dry Hard Turning Operation

2018 ◽  
Vol 12 (1) ◽  
pp. 175-191 ◽  
Author(s):  
S. Yousefi ◽  
M. Zohoor
Keyword(s):  
Surface Roughness ◽  
Boron Nitride ◽  
Tool Wear ◽  
Feed Rate ◽  
Hard Turning ◽  
Cubic Boron Nitride ◽  
Dimensional Accuracy ◽  
Spindle Speed ◽  
Cutting Depth ◽  
Nose Radius

Objective: Hard turning in dry condition using cubic boron nitride tools, as an alternative of traditional grinding operation, is an advanced machining operation in which hardened steel with the hardness greater than 46 HRc is machined without the use of any coolant. Method: In the hard turning process, due to its hard nature, usually the cutting depth is selected lower than or equal to the nose radius, and the cutting zone is mainly limited within the tool nose area. Thus, unlike the traditional turning, the effect of the nose radius on the surface finish and dimensional accuracy becomes more complicated. Therefore, in this paper, firstly, the effect of processing parameters such as nose radius on the surface roughness and dimensional accuracy is investigated. Then, the relationship between the surface finish and dimensional accuracy variations with vibration, cutting forces, and tool wear is studied experimentally. The results revealed that feed rate is the most important factor influencing the surface roughness, whereas spindle speed and cutting depth are insignificant factors. On the other hand, cutting depth and spindle speed have the greatest effect on the dimensional accuracy, while nose radius has no significant effect. The vibration and wear analysis revealed that compared with the vibration, the tool wear has no considerable effect on the dimensional accuracy. It was also observed that the spindle speed has a contradictory effect on the surface roughness and dimensional accuracy. The best dimensional accuracy is obtained at 500 rpm, while the best surface quality is achieved at 2000 rpm. Result: The obtained results also showed that increasing the feed rate from a particular value not only leads to no significant changes in the surface roughness value but in some cases can also decrease the surface roughness. Conclusion: According to the analysis results, the lowest cutting depth, the moderate feed rate, and the speed lower than 1100 rpm provide the best dimensional accuracy. Compared with carbides and ceramics, cubic boron nitride tools produce a better surface roughness at both higher cutting depth and speed. 0.202 µm is the best surface roughness that was obtained at rε = 1.2 mm, N = 2000 rpm, f = 0.08 mm/rev, d = 0.5 mm which is comparable with the surface quality obtained by the conventional grinding operation.

scholarly journals Toolpath strategies and management to optimize energy consumption on 3-axis CNC milling machine

2018 ◽  
Vol 67 ◽  
pp. 02054
Author(s):  
Gandjar Kiswanto ◽  
Poly Poly ◽  
Yolanda Rudy Johan
Keyword(s):  
Energy Consumption ◽  
Evaluation Process ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Milling Machine ◽  
Cnc Milling ◽  
Total Energy Consumption ◽  
Cutting Energy ◽  
Cnc Milling Machine ◽  
The Right

CNC milling machine is a production machine which widely used to manufacture many kinds of products. In the process of milling machining, the time needed to produce a component must be as minimum as possible to minimize the costs and its impacts on the environment. One of energy consumptions used in CNC milling machines is to supply electric motors for each axis of motions. Cutting energy consumption can be minimized by optimizing the cutting parameters, such as the cutting toolpath. Modelling and comparing the total energy consumption of the cutting process from different cutting toolpaths and strategies are important in selecting the right toolpath that has the smallest energy consumption. To achieve this goal, this study models the energy consumption during the cutting process. The model is then used to evaluate and compare different cutting toolpaths from different cutting strategies. Three prismatic and one sculptured part were used to examine the model of cutting energy consumption. A Graphical User Interface is also developed to simplify the comparison and evaluation process. Through this process it will be possible to predict energy consumption in the cutting toolpath and hence enable the selection of the right toolpath to reduce energy consumption in machining.

scholarly journals Effect of feed rate and depth of cut on face milling process on surface roughness of Al-Mg alloy using CNC milling machine 3 axis

2021 ◽  
Vol 3 (11) ◽  
pp. 11-18
Author(s):  
Rachmawati Achadiah ◽  
Putu Hadi Setyarini ◽  
Mas Ayu Pambayoen ◽  
Irfan H. Djunaidi ◽  
Dan Sti Azizah
Keyword(s):  
Surface Roughness ◽  
Control System ◽  
Feed Rate ◽  
Milling Process ◽  
Face Milling ◽  
Depth Of Cut ◽  
Rate Variation ◽  
Milling Machine ◽  
Cnc Milling ◽  
Cnc Milling Machine

The purpose of this study was to determine the effect of feed rate and depth of cut on the surface roughness of Al-Mg aluminum using a DIY CNC Milling Machine and Krisbow Universal Milling Machine as a comparison. The open-loop control system is a control system used in the design of DIY CNC Milling machines. A PC with Mach3 software is used as a PC Based Direct Digital Controller to control the system. In this study, the feed rate variation 24 mm/minute and 42 mm/minute and depth of cut 0.25 mm, 0.5 mm, and 0.75 mm were used. After the face milling process, the surface roughness test was carried out using the Mitoyo Surface Roughness Tester to determine the level of surface roughness of the machining results the DIY Milling Machine and Krisbow Universal Milling Machine as a comparison. The results showed that as the feed rate and depth of cut increased, the surface roughness values of both tools increased.

scholarly journals Experimental Investigation of Cutting Tool In VMM-A-200 CNC Milling Machine

2021 ◽  
pp. 7-15
Author(s):  
K. Sabarieasan ◽  
S. Ajay ◽  
S. Gopinath ◽  
A. Kirubakaran ◽  
M. K. Sakthi Mugesh
Keyword(s):  
Tool Life ◽  
Cutting Forces ◽  
Cutting Tools ◽  
Cutting Parameters ◽  
Vital Role ◽  
Milling Machine ◽  
Cnc Milling ◽  
Ansys Software ◽  
Cnc Milling Machine ◽  
Milling Tool

The project aims at effect of cutting forces on the drill & end mill cutter tools in modern manufacturing. For High-speed machining operation, accuracy of tool tip places a vital role in mass manufacturing. In order to get high precision, high-efficiency automated production the tool life should be longer enough to withstand various stresses acting on it. The main aim is to develop the combination of optimum cutting parameters by using taguchi method. In this project design of experiment has been employed with L9 (3^3) Orthogonal Array for three parameters namely Speed, Feed and Depth of cut. For each of these parameters three different levels have been identified and used to perform the cutting parameters for minimizing the stresses acting on various tool in SINEWAVE© VMM-A-200 CNC Milling Machine. The material selected for machining was Aluminium plate with drill & end drill cutter tools. Cutting forces are experimentally determined at a tip of cutting tools during machining by milling tool dynamometer. From the obtained cutting forces are applied on tip of cutting tools and results are evaluated using ANSYS software such as various stresses, strain and total deformation are found. Cutting Tools are modelled in CREO software and the model is then imported in ANSYS software for analysis. Also, from stress analysis of milling tool it is evident thrust force play a vital role in machining, whenever the stress is minimum then the tool life become maximum.

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