Surface Quality of the Fiberglass Composite Material after Milling

2014 ◽  
Vol 682 ◽  
pp. 183-187 ◽  
Author(s):  
A.S. Yuanyushkin ◽  
D.A. Rychkov ◽  
D.V. Lobanov
Keyword(s):  
Composite Material ◽  
Tool Wear ◽  
Surface Quality ◽  
Cutting Speed ◽  
High Strength ◽  
Cutting Conditions ◽  
Feed Speed ◽  
Composite Surface ◽  
Fiberglass Composite

One of the prevalent ways of machining is milling, however to obtain the high fiberglass composite surface quality is difficult because of its layered structure, high strength and low thermal conductivity characteristics. This leads to the need for milling technology which provides high-quality surface. Our experiments for milling of the fiberglass composite show that the surface roughness, as one of the quality criteria, to a large depends on cutting conditions, tool material and wear of the cutting edge determined by the bevel rear tool wear. To ensure of the surface quality of the composite material during milling recommended that the bevel rear tool wear does not exceed 0.35 mm, cutting conditions were the following limits: feed speed, 0.15 – 0.17 mm/cog, depth of the cut, 0.3 – 0.6 mm, cutting speed, 45 – 48 m/s and the cutting part of the tool is made of high strength tool materials such as hard metal VK3M.

Experimental Study on Reciprocating Electroplated Diamond Wire Saws Cutting SiC Wafer

2010 ◽  
Vol 450 ◽  
pp. 296-299 ◽  
Author(s):  
Xiao Ye Wang ◽  
Yan Li ◽  
Shu Juan Li
Keyword(s):  
Surface Quality ◽  
Tangential Force ◽  
Cutting Speed ◽  
Work Piece ◽  
Feed Speed ◽  
Diamond Wire ◽  
Wire Saw ◽  
Diamond Wire Saw ◽  
Sic Wafer

The experiment that WXD170-type reciprocating rotating diamond wire saw cuts SiC wafer was studied using orthogonal test method in this paper. The influence of cutting speed of diamond wire saw, work-piece feed speed and rotating speed of work-piece on cutting process were analyzed. The optimized cutting parameters which can improve surface quality of slices and reduce tangential force were obtained. The results show that: the surface quality of slices which was cloud-shaped can be improved significantly due to the increase of the work-piece rotation. The work-piece feed speed and the rotation speed have greater impact on the tangential force than the saw wire speed; the work-piece feed speed and the work-piece rotation speed have greater impact on surface roughness than the saw wire speed. An important way to be obtained the smaller tangential force and better surface quality of slices is considering of a reasonable match among cutting speed of diamond wire saw, work-piece feed speed and rotating speed of work-piece comprehensively.

Study on Identifying Surface Quality of Work Pieces Based on Texture Analysis

2012 ◽  
Vol 201-202 ◽  
pp. 594-597
Author(s):  
Wei Wei Wang ◽  
Dong Hu
Keyword(s):  
Surface Quality ◽  
Surface Texture ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Depth Of Cut ◽  
Feed Speed ◽  
Workpiece Surface ◽  
Quality Of Work ◽  
Short Time

In order to recognize the integrity of workpiece surface texture, this paper introduces the method of mended texture spectrum based on workpiece surface texture. The workpiece surface texture images can be described based on analyzing the influence of cutting parameters on the surface texture. The experimental results indicate that the cutting parameters have a great effect on the integrity of workpiece surface texture. In other words, the effect of cutting speed is evident, that of feed speed, depth of cut to a less extent. In addition, the integrity of texture changes greatly in short time with the increase of cutting parameters.

Research on Deep-hole Drilling Quality of High-strength Steel With Slender Gun Drill

2021 ◽  
Author(s):  
Jiabin Liang ◽  
Li Jiao ◽  
Pei Yan ◽  
Minghui Cheng ◽  
Tianyang Qiu ◽  
...  
Keyword(s):  
Cutting Force ◽  
High Strength Steel ◽  
Fluid Pressure ◽  
Cutting Speed ◽  
High Strength ◽  
Feed Speed ◽  
Machining Parameters ◽  
Deep Hole ◽  
Machining Quality ◽  
Gun Drill

Abstract There are a lot of problems exist in the processing of long and thin deep hole gun drilling of high strength steel, such as insufficient of the machining mechanism and characteristics of gun drilling, difficulty in selecting machining parameters, unknown influence mechanism of machining parameters on drilling force, drilling temperature and machining quality. In this paper, 42CrMo high strength steel is selected as the workpiece material. A numerical model of cutting force is established based on the mechanism of gun drill, and then the finite element simulation and processing test are carried out. The results show that the cutting force decreases with the increase of cutting speed, and increases with the increase of feed speed; the error between the theoretical and actual value is less than 10%. Cutting speed and feed speed have a great influence on machining quality, and the cutting fluid pressure mainly affects the surface roughness.

scholarly journals Research on the Influencing Factors of "Scale Veins" of Single Point Incremental Forming Workpieces Surface

2015 ◽  
Vol 9 (1) ◽  
pp. 1025-1032
Author(s):  
Shi Pengtao ◽  
Li Yan ◽  
Yang Mingshun ◽  
Yao Zimeng
Keyword(s):  
Surface Quality ◽  
Incremental Forming ◽  
Single Point ◽  
Spindle Speed ◽  
Experimental Results ◽  
Feed Speed ◽  
Single Point Incremental Forming ◽  
Machining Parameters ◽  
The Mathematical Model

To furthermore optimize the machining parameters and improve the surface quality of the workpieces manufactured by single point incremental forming method, the formation mechanism of the sacle veins on the metal incremental froming workpieces was studied through experiment method. The influence principle of the spindle speed, the feed speed and the material of tip of tools on the length of scale veins was obtained through analyzing the experimental results and building the mathematical model among the length of scale veins were feed speed and spindle speed through measuring the roughness of surfaces and observing the appearance of the forming workpieces. The experimental results showed that, the spindle speed, the feed speed and the material of tool tips have a significant effect on the scale veins formation on the surface of forming workpieces. Therefore, an appropriate group of spindle speed and feed speed can reduce the effect of scale veins on the roughness of single point incremental forming workpieces and furthermore improve the surface quality of forming workpieces.

scholarly journals Effect of High Speed Milling Process Parameters on the Milling Force and Surface Topography of AM50A Magnesium Alloy

2018 ◽  
Vol 36 (1) ◽  
pp. 124-131
Author(s):  
Hongji Zhang ◽  
Yuanyuan Ge ◽  
Hong Tang ◽  
Yaoyao Shi ◽  
Zengsheng Li
Keyword(s):  
Magnesium Alloy ◽  
Surface Quality ◽  
High Speed ◽  
Milling Process ◽  
Spindle Speed ◽  
Feed Speed ◽  
Milling Force ◽  
High Speed Milling ◽  
Milling Parameters

Within the scope of high speed milling process parameters, analyzed and discussed the effects of spindle speed, feed rate, milling depth and milling width on milling forces in the process of high speed milling of AM50A magnesium alloy. At the same time, the influence of milling parameters on the surface roughness of AM50A magnesium alloy has been revealed by means of the measurement of surface roughness and surface micro topography. High speed milling experiments of AM50A magnesium alloy were carried out by factorial design. Form the analysis of experimental results, The milling parameters, which have significant influence on milling force in high speed milling of AM50A magnesium alloy, are milling depth, milling width and feed speed, and the nonlinear characteristics of milling force and milling parameters. The milling force decreases with the increase of spindle in the given mill parameters. For the effects of milling parameters on surface quality of the performance, in the milling depth and feeding speed under certain conditions with the spindle speed increases the surface quality of AM50A magnesium alloy becomes better with the feed speed increases the surface quality becomes poor. When the spindle speed is greater than 12000r/min, the milling depth is less than 0.2mm, and the feed speed is less than 400mm/min, the milling surface quality can be obtained easily.

Experimental Study on Tool Wear when Machining Super Titanium Alloys: Ti6Al4V and Ti-555

2013 ◽  
Vol 763 ◽  
pp. 51-64
Author(s):  
Mohammed Nouari ◽  
Hamid Makich
Keyword(s):  
Tool Wear ◽  
Temperature Rise ◽  
Wear Behavior ◽  
Flow Direction ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Cutting Conditions ◽  
Wear Process ◽  
Texture Modification ◽  
Wear Modes

To understand the effect of the workpiece microstructure on the tool wear behavior, anexperimental investigation was conducted on machining two different microstructures of supertitanium alloys: Ti-6Al-4V and Ti-555. The analysis of tool-chip interface parameters such asfriction, heat flux and temperature rise and the evolution of the workpiece microstructure underdifferent cutting conditions have been discussed. As cutting speed and feed rate increase, the meancutting forces and temperature show different progressions depending on the consideredmicrostructure. Results show that wear modes for cutting tools used in machining the Ti-555 alloyshow contrast from those exhibited by tools used in machining the Ti6AI4V alloy. In fact, onlyabrasion wear was observed for cutting tools in the case of machining the near-β titanium Ti-555alloy. The last alloy is characterized by a fine-sized microstructure (order of 1 μm). For the usualTi6Al4V alloy, adhesion and diffusion modes followed by coating delamination process on the toolsubstrate have been clearly identified. Moreover, a deformed layer was observed under secondaryelectron microscope (SEM) from the sub-surface of the chip with β-grains orientation along thechip flow direction. The analysis of the microstructure confirms the intense deformation of themachined surface and shows a texture modification, without phase transformation. For the Ti-555β-alloy, β grains experiences more plastic deformation and increases the microhardness of theworkpiece inducing then an abrasion wear process for cemented carbide tools. For the Ti6Al4Vmicrostructure, the temperature rise induces a thermal softening process of the workpiece andgenerates adhesive wear modes for cutting tools. The observed worn tool surfaces confirm theeffect of the microstructure on tool wear under different cutting conditions for the two studiedtitanium alloys.

scholarly journals Investigation of Surface Quality of CoCrMo Alloy Used in the Tibial Component of the Knee Prosthesis According to the Methods of Turning and Turning-Grinding

2019 ◽  
Vol 26 (1) ◽  
pp. 41-48
Author(s):  
Erkan BAHÇE ◽  
M. Sami GÜLER ◽  
Ender EMİR
Keyword(s):  
Surface Quality ◽  
Tibial Component ◽  
Thermal Stresses ◽  
Knee Prosthesis ◽  
Cutting Speed ◽  
Tool Geometry ◽  
Depth Of Cut ◽  
Cocrmo Alloy ◽  
Grinding Method

CoCrMo alloys, which are well-known Co-based biomedical alloys, have many different types of surface integrity problems reported in literature. Residual stresses, white layer formation and work hardening layers are some those, matters which occur as a microstructural alteration during machining. Therefore, such problems should be solved and surface quality of end products should be improved. In this paper, the surface quality of CoCrMo alloy used in tibial component of the knee prosthesis produced by means of turning was investigated. An improvement was suggested and discussed for the improvement in their machinability with the developed turning-grinding method. Finite element analyses were also carried out to calculate temperature and thermal stresses distribution between the tool and the tibial component. The results showed that many parameters such as cutting speed, feed rate, depth of cut, tool geometry, and tool wear affect the surface quality of workpieces of CoCrMo alloy. In the turning-grinding method, the machining time is reduced by about six times compared to machining only method. The EDX analysis performed on the surface after machining showed that metal diffusion occurred from tool to the tibial component.

scholarly journals Prediction of Tool Lifetime and Surface Roughness for Nickel-Based Waspaloy

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Shao-Hsien Chen ◽  
Chung-An Yu
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
High Speed ◽  
Cutting Speed ◽  
High Strength ◽  
Cutting Parameters ◽  
Experimental Results ◽  
Predictive Values ◽  
Actual Surface ◽  
Wide Range

In recent years, most of nickel-based materials have been used in aircraft engines. Nickel-based materials applied in the aerospace industry are used in a wide range of applications because of their strength and rigidity at high temperature. However, the high temperatures and high strength caused by the nickel-based materials during cutting also reduce the tool lifetime. This research aims to investigate the tool wear and the surface roughness of Waspaloy during cutting with various cutting speeds, feed per tooth, cutting depth, and other cutting parameters. Then, it derives the formula for the tool lifetime based on the experimental results and explores the impacts of these cutting parameters on the cutting of Waspaloy. Since the impacts of cutting speed on the cutting of Waspaloy are most significant in accordance with the experimental results, the high-speed cutting is not recommended. In addition, the actual surface roughness of Waspaloy is worse than the theoretical surface roughness in case of more tool wear. Finally, a set of mathematical models can be established based on these results, in order to predict the surface roughness of Waspaloy cut with a worn tool. The errors between the predictive values and the actual values are 5.122%∼8.646%. If the surface roughness is within the tolerance, the model can be used to predict the residual tool lifetime before the tool is damaged completely. The errors between the predictive values and the actual values are 8.014%∼20.479%.

An intelligent prediction model of the tool wear based on machine learning in turning high strength steel

2020 ◽  
Vol 234 (13) ◽  
pp. 1580-1597
Author(s):  
Minghui Cheng ◽  
Li Jiao ◽  
Xuechun Shi ◽  
Xibin Wang ◽  
Pei Yan ◽  
...  
Keyword(s):  
Tool Wear ◽  
Prediction Model ◽  
Cutting Force ◽  
Surface Quality ◽  
Surface Texture ◽  
High Strength Steel ◽  
Prediction Models ◽  
High Strength ◽  
Support Vector ◽  
Time Frequency

In the process of high strength steel turning, tool wear will reduce the surface quality of the workpiece and increase cutting force and cutting temperature. To obtain the fine surface quality and avoid unnecessary loss, it is necessary to monitor the state of tool wear in the dry turning. In this article, the cutting force, vibration signal and surface texture of the machined surface were collected by tool condition monitoring system and signal processing techniques are being used for extracting the time-domain, frequency-domain and time-frequency features of cutting force and vibration. The gray level processing technique is used to extract the features of the gray co-occurrence matrix of the surface texture and found that these features changed simultaneously when the cutting tool broke. After this, an intelligent prediction model of tool wear was built using the support vector regression (SVR) whose kernel function parameters were optimized by the grid search algorithm (GS), the genetic algorithm (GA) and the particle swarm optimization algorithm respectively. The features extracted from the signals and surface texture are used to train the prediction model in MATLAB. It was found that after the surface texture features were fused using the intelligent prediction model on the basis of the features of cutting force and vibration, prediction accuracy of the proposed method is found as 97.32% and 96.72% respectively under the two prediction models of GA-SVR and GS-SVR. Moreover, the intelligent prediction model can not only predict the tool wear under different cutting conditions, but also the different wear stages in a single wear cycle and the absolute error between the predicted value and the actual value is less than 10 μm, the confidence coefficient of prediction curve is around 0.99.

scholarly journals The influence of brushing on the surface quality of aluminium

2018 ◽  
Vol 178 ◽  
pp. 01015 ◽  
Author(s):  
Uwe Teicher ◽  
Richard Schulze ◽  
Alexander Brosius ◽  
Andreas Nestler
Keyword(s):  
Surface Quality ◽  
Force Measurement ◽  
Experimental Studies ◽  
Cutting Speed ◽  
Technological Parameters ◽  
Milling Operation ◽  
Metal Machining ◽  
Modelling Methods ◽  
Main Influence

The extension of technical capabilities of machine centres for complete machining of components can improve their performance. In the field of sheet metal machining, the objective beside the classic milling operation was a generation of functional surfaces by face brushing. The experimental studies have probed the influence of tools and technological parameters on the surface quality. In addition to an analysis of the relevant roughness parameters the formation of the surface topography was analysed by several measurement methods. By the application of force measurement, the results of the surface quality can be interpreted additionally. It could be shown that the feed rate in contrast to the cutting speed has the main influence on the surface roughness. A peculiarity is given by the parameter-based width of cut that should be known for reliable process control. The acquired data can be applied in the form of process characteristic fields for further processing with simulation and modelling methods.

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