Study on Additional Electrical Current on Machinability of Free-Machining Steels in Turning

2010 ◽  
Vol 34-35 ◽  
pp. 1775-1779
Author(s):  
Yong Chuan Lin ◽  
Yuan Ling Chen
Keyword(s):  
Cutting Force ◽  
Current Source ◽  
Cutting Speed ◽  
Electrical Current ◽  
Carbide Tool ◽  
Cutting Mechanism ◽  
High Cutting Speed ◽  
Aisi 1045 ◽  
Steel Aisi ◽  
Standard Steel

This paper deals with the mach inability of BN free-machining steel in turning with a supplied current of various values and different directions of electrical current. The tested work pieces were, standard steel AISI 1045 and BN added steel (AISI 1045-BN) based AISI 1045 which has good mach inability at high cutting speed. Turning tests were performed by carbide tool P30 and the power source for additional electrical current supply was a direct current source and the maximum electrical current in the circuit was 20milliamperes (mA). To investigate the influence of electrical conditions of closed circuit system on the cutting mechanism of AISI 1045-BN. The tool life, cutting force, and others were determined experimentally. The testing results show that when turning with carbide tool P30 the maximum crater depth in the tool was reduced drastically when the value of supplied current reached 5mA, regardless of its direction of flow, compared with depths at lower current values; the additional electrical current cutting showed smaller cutting force than those of conditions when turning AISI 1045-BN.

Performance Evaluation of PVD and CVD Coated Inserts during End Milling with DRY and MQL Condition

2017 ◽  
Vol 867 ◽  
pp. 165-170
Author(s):  
Isha Srivastava ◽  
Ajay Batish
Keyword(s):  
Tool Wear ◽  
Cutting Force ◽  
End Milling ◽  
Cutting Speed ◽  
Minimum Quantity Lubrication ◽  
Sem Analysis ◽  
Depth Of Cut ◽  
High Cutting Speed ◽  
Cutting Operation ◽  
En 31

The aim of this study were to evaluate the performance of PVD (TiAlN+TiN) and CVD (TiCN+Al2O3+TiN) coated inserts in end milling of EN–31 hardened die steel of 43±1 HRC during dry and MQL (Minimum quantity lubrication) machining. The experiments were conducted at a fixed feed rate, depth of cut and varying cutting speed to measure the effect of cutting speed on cutting force and tool wear of CVD and PVD-coated inserts. The performance of CVD and PVD-coated inserts under dry and MQL condition by measuring the tool wear and cutting force were compared. During cutting operation, it was noticed that PVD inserts provide less cutting force and tool wear as compared to the CVD inserts under both dry as well as the MQL condition because PVD inserts have a thin insert coating and CVD inserts have a thick insert coating, but PVD inserts experience catastrophic failure during cutting operation whereas CVD inserts have a capability for continuous machining under different machining. Tool wear has measured by SEM analysis. The result shows that MQL machining provides the optimum results as compared to the dry condition. MQL machining has the ability to work under high cutting speed. As the cutting speed increases the performance of dry machining was decreased, but in MQL machining, the performance of the inserts was increased with increases of cutting speed. MQL machining generates less cutting force on the cutting zone and reduces the tool wear which further increase the tool life.

scholarly journals Experimental Investigation on Surface Roughness and Tool Wear in Dry Machining of TiC Reinforced Aluminium LM6 Composite

2013 ◽  
Vol 773-774 ◽  
pp. 339-347 ◽  
Author(s):  
Muhammad Yusuf ◽  
M.K.A. Ariffin ◽  
N. Ismail ◽  
S. Sulaiman
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Feed Rate ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Depth Of Cut ◽  
Carbide Tool ◽  
Dry Machining ◽  
Workpiece Surface ◽  
High Cutting Speed

With increasing quantities of applications of Metal Matrix Composites (MMCs), the machinablity of these materials has become important for investigation. This paper presents an investigation of surface roughness and tool wear in dry machining of aluminium LM6-TiC composite using uncoated carbide tool. The experiments carried out consisted of different cutting models based on combination of cutting speed, feed rate and depth of cut as the parameters of cutting process. The cutting models designed based on the Design of Experiment Response Surface Methodology. The objective of this research is finding the optimum cutting parameters based on workpiece surface roughness and cutting tool wear. The results indicated that the optimum workpiece surface roughness was found at high cutting speed of 250 m min-1 with various feed rate within range of 0.05 to 0.2 mm rev-1, and depth of cut within range of 0.5 to 1.5 mm. Turning operation at high cutting speed of 250 m min-1 produced faster tool wear as compared to low cutting speed of 175 m min-1 and 100 m min-1. The wear minimum (VB = 42 μm ) was found at cutting speed of 100 m min-1, feet rate of 0.2 mm rev-1, and depth of cut of 1.0 mm until the length of cut reached 4050 mm. Based on the results of the workpiece surface roughness and the tool flank wear, recommended that turning of LM6 aluminium with 2 wt % TiC composite using uncoated carbide tool should be carried out at cutting speed higher than 175 m min-1 but at feed rate of less than 0.05 mm rev-1 and depth of cut less than 1.0 mm.

Study on Determination of Friction Model at the Tool-Chip Interface of Titanium Alloy Ti6Al4V Based on Orthogonal Cutting

2011 ◽  
Vol 117-119 ◽  
pp. 1788-1791
Author(s):  
Yue Feng Yuan ◽  
Wu Yi Chen
Keyword(s):  
Titanium Alloy ◽  
Cutting Force ◽  
Metal Cutting ◽  
Orthogonal Cutting ◽  
Cutting Speed ◽  
Friction Model ◽  
Carbide Tool ◽  
Orthogonal Turning ◽  
Titanium Alloy Ti6al4v

It is necessary for cutting simulation to determine the friction model at the tool-chip interface suitable for metal cutting process. Cutting force experiments in orthogonal turning titanium alloy TI6AL4V are carried out with cement carbide tool KW10. The Coulomb frictions at the tool-chip interface are calculated based on measured cutting force, and the friction model is regressed, where cutting speed and feed rate are presented.

Numerical Simulation on Vibration-Assisted Ultra-Precision Cutting of Steel AISI 1045 with PCD Tool

2012 ◽  
Vol 497 ◽  
pp. 324-328 ◽  
Author(s):  
Ahmed Al-Zahrani ◽  
Xiao Dan Xie ◽  
Yong Li
Keyword(s):  
Cutting Force ◽  
Polycrystalline Diamond ◽  
Finite Element Software ◽  
Pcd Tool ◽  
Optimum Selection ◽  
Aisi 1045 ◽  
Ultra Precision ◽  
Steel Aisi ◽  
Different Depths ◽  
Tool Cutting

Vibration-assisted cutting (VAC) with polycrystalline diamond (PCD) tool refers to the cutting with certain amplitude and high frequency tool vibration, which can definitely reduce the cutting force and tool wear compared with conventional cutting (CC). In this paper, a plane strain orthogonal model for PCD tool cutting steel AISI 1045 is established by using the finite element software ABAQUS/explicit. Then the cutting force of VAC compared with CC is explained. The value and distribution of cutting force at different depths of cutting is analyzed. It is also studied the effects of vibration frequency and amplitude on cutting force and thrust force during the ultra-precision cutting process. Afterwards, optimum selection of process parameters is presented for VAC processing of steel AISI 1045.

Radiation Thermometry at a High-Speed Turning Process

2004 ◽  
Vol 126 (3) ◽  
pp. 488-495 ◽  
Author(s):  
Bernhard Mu¨ller ◽  
Ulrich Renz ◽  
Stefan Hoppe ◽  
Fritz Klocke
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Radiation Thermometry ◽  
Cutting Speed ◽  
Turning Process ◽  
Time Resolved ◽  
Aisi 1045 ◽  
Steel Aisi ◽  
Aa 7075 ◽  
Titanium Alloy Ti6al4v

A fiber-optic two-color pyrometer with high spatial and temporal resolution has been applied to measure temperatures at an external turning process. Different measurement positions have been realized at the chip and the workpiece. The measurements have been performed at three different workpiece materials: carbon steel AISI 1045, aluminum alloy AA 7075, and titanium alloy Ti6Al4V. The influences of different parameters like cutting speed, feed, and position of the measurement spot on the temperatures have been investigated. The cutting speed has been increased from conventional values up to 100 m/s for AISI 1045, 117 m/s for AA 7075, and 10 m/s for Ti6Al4V. Additionally, a review of radiation thermometry techniques and applications regarding time resolved temperature measurements in metal cutting will be presented.

Study of the Relationship between Cutting Speed, Tool Wear and Machining Forces in Turning with Carbide Tool

2014 ◽  
Vol 902 ◽  
pp. 88-94
Author(s):  
Heraldo J. Amorim ◽  
Augusto O. Kunrath Neto
Keyword(s):  
Tool Wear ◽  
Cutting Force ◽  
Cutting Speed ◽  
Average Error ◽  
Machining Forces ◽  
Feed Force ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel ◽  
The Relationship

The understanding of machining processes comprises the study of phenomena such as: chip formation, cutting forces, tool wear mechanisms and the influence of the cutting parameters and machined materials on them. The aim of this work is to analyze the tool wear effects on machining forces during machining of AISI 1040 and 1045 carbon steels with carbide tool. Long-term machinability tests were performed, in which cutting force, feed force and tool wear were measured. Tool life results were analyzed, with best tool lives found for the AISI 1040 steel for all tested speeds. The other variables were analyzed as function of both time and tool wear. On the time domain, strong dependencies were found for both materials for tool wear, cutting force and feed force. The relationship between cutting force and tool wear showed good correlation for both materials, and the same was observed for feed force and tool wear relationship. Weak influence of cutting speed was observed on the relationship between tool wear and machining forces, which suggest that a single equation can describe them for all studied conditions with reasonable accuracy. The regression results are able to predict cutting forces as a function of tool wear with an average error of about 2.6 % during machining of AISI 1040 and 5.2 % for AISI 1045 steel. For the prediction of feed force as a function of tool wear, the average error is about 5.6 % for AISI 1040 and 7.0 % for the AISI 1045 steel, since a restricted domain is established. Data analysis showed a discontinuity in the behavior of feed force as a function of tool wear near the end of the life of the tools for most tests performed with AISI 1045 and some tests with AISI 1040 that suggest backwall wear, which was further evidenced by sudden change of chip form near the end of tool life in AISI 1040 steel.

Optimal Design for Cutting Mechanism of the Sugarcane Planting

2012 ◽  
Vol 271-272 ◽  
pp. 589-593
Author(s):  
Yan Zhou Li ◽  
Qing Zhou ◽  
Wei Wang ◽  
Wei He ◽  
Lin Jun Jiang
Keyword(s):  
Cutting Force ◽  
Sugar Cane ◽  
Cutting Speed ◽  
Production Costs ◽  
Cutting Mechanism ◽  
Wheel Drive ◽  
Blade Edge ◽  
Successful Design ◽  
Selection Of ◽  
Transfer Device

In this paper, mainly according to the selection of sugar cane seeds and the quality requirements for cutting, we design a cutting mechanism not only to cut off the sugar cane , but also can ensure the cutting sugarcane planting to achieve the agronomic requirements for sugar cane . The institution's overall ideas are as follows: first,measure different kinds of sugar cane planting in different cutting force and cutting speed in case of broken head.After preliminary analysis,gain cutting force,cutting speed ,the diameter of sugar cane ,the species of sugar cane ,cutting blade edge angle, cutting angle and cutting mode correlation.Then select the power transfer device and the working parts of the disk and blade according to the obtained data.Last design drive of belt wheel, drive shaft, bearing type, bearing cover through calculation and checking.The successful design and development of the institution of sugar cane cutting mechanism will be able to greatly reduce the labor intensity and production costs in the process of sugarcane planting.

scholarly journals Efecto de parámetros de mínima cantidad de lubricación en reducción de desgaste de herramienta

2019 ◽  
pp. 19-26
Author(s):  
Israel Martínez-Ramírez ◽  
Miguel Ernesto Gutiérrez-Rivera ◽  
Isaí Espinoza-Torres ◽  
Javier Rodríguez-Flores
Keyword(s):  
Tool Wear ◽  
Flank Wear ◽  
Cutting Speed ◽  
Minimum Quantity Lubrication ◽  
Vertical Angle ◽  
Low Level ◽  
High Cutting Speed ◽  
Designed Experiment ◽  
Aisi 1045 ◽  
High Level

The objective of this work is to determine the influence of Minimum Quantity Lubrication (MQL) parameters on flank wear during face milling. Furthermore, the values of each factor in which the MQL resulted to be effective were determined. A designed experiment with two level, three factor and two replicas was used to test tool wear on P45 grade inserts at relatively high cutting speed (~900 m/min) on steel AISI 1045. A commercial MQL system was used with vegetable base lubricant non soluble in water. Results show that amount of lubricant and vertical angle are key factors that affects the effectiveness of the process. A response surface equation was obtained in order to determine the zones in which the factors resulted in the lowest tool wear. A flank wear decrease of 7 times, respect to the maximum observed, was found by using low level of air flow, low level of vertical angle and high level of lubricant.

Experimental Investigation on Cutting Force and Tool Wear of Carbide Tools in Ti6Al4V Turning

2008 ◽  
Vol 375-376 ◽  
pp. 231-235
Author(s):  
Xiao Qin Wang ◽  
Xing Ai ◽  
Jun Zhao ◽  
Tian Tian Li
Keyword(s):  
Experimental Investigation ◽  
Tool Wear ◽  
Cutting Force ◽  
Cutting Speed ◽  
Carbide Tool ◽  
Edge Angle ◽  
Tungsten Carbide Tool ◽  
The Relationship ◽  
Turning Test ◽  
State Of Art

This paper introduced the machinability and the state-of-art of Ti6Al4V machining. Turning test with thee different tungsten carbide tool have be done at cutting speed 40, 80, 120, 160 m/min, the relationship between cutting force and cutting speed, cutting distance was analyzed, the influence of working cutting edge angle on the tool wear and cutting force was investigated as well. Finally, the tool wear and wear mechanics was analyzed.

Development of apparatus to evaluate cutting resistance of protective fabrics

2021 ◽  
pp. 004051752199467
Author(s):  
Magdi El Messiry ◽  
Elshiamaa Mohamed Eid
Keyword(s):  
Cutting Force ◽  
Cutting Speed ◽  
Cutting Mechanism ◽  
Textile Materials ◽  
Cutting Resistance ◽  
Normal Forces ◽  
New Apparatus ◽  
Materials Used ◽  
Protective Fabrics ◽  
Cutting Processes

In recent decades, attention has been focused on the design of protective soft fabrics against cutting. The anticipated textiles should shield the wearer's body from threats caused by pointed or sharp-edged objects, such as a knife, sharp blade, or spike. Therefore, as it is of great importance to design slash-resistant fabrics, it is also necessary to have an apparatus that gives the possibility to simulate the conditions of cutting processes of the protective fabric. The main objective of the present work is to develop a new apparatus to test the slash-proof materials used in soft protective armor or gloves. The apparatus can test the material with different cutting angles, different speeds, and various normal forces applied to the sample at the point of contact between the material and the cutting blade, with the capability to change all the parameters affecting the cutting force. This study aims to develop a cutting apparatus to study the cutting mechanism of textile materials with the capability to change all the parameters affecting the cutting force. The cutting angle and cutting speed have a significant effect on the maximum cutting force; however, the latter showed a high decrease of the maximum cutting force.

Sign in / Sign up

Export Citation Format

Share Document