Morphology of the Chip Formation at Orthogonal High Speed Milling of AISI H13

2016 ◽  
Vol 686 ◽  
pp. 45-50 ◽  
Author(s):  
Jan Řehoř ◽  
Jaroslava Fulemová ◽  
Katarína Monková ◽  
Peter Monka
Keyword(s):  
Chip Formation ◽  
High Speed ◽  
Cutting Temperature ◽  
Evaluation Process ◽  
Machining Process ◽  
High Speed Cutting ◽  
Analysis And Evaluation ◽  
Measurement Results ◽  
Aisi H13

High-speed cutting (HSC) or high-speed machining (HSM) is an issue that the scientists deals with in long-term. To demonstrate the explicitness, that a full HSC machining process is considered, it is necessary to monitor the series of factors. In particular, the process of chip formation, cutting forces, cutting temperature, vibration, tool life and surface finish quality in relation to the method of machining, machined material and its properties. The article deals with the detailed analysis and evaluation of the chip formation in order to determine the hard area, transition area and veritable HSC machining. The evaluation process is based on the proposed experimental model, which is confronted with the measurement results.

Research on Dynamic Physical Simulation of HSC Comprehensive Characteristics

2008 ◽  
Vol 375-376 ◽  
pp. 454-458
Author(s):  
Dao Chun Xu ◽  
Ping Fa Feng ◽  
Jing Feng Zhi ◽  
Ding Wen Yu ◽  
Zhi Jun Wu
Keyword(s):  
High Speed ◽  
Physical Simulation ◽  
Three Dimensional ◽  
Cutting Temperature ◽  
Simulation Models ◽  
Technical Difficulty ◽  
Machining Process ◽  
Processing Efficiency ◽  
High Speed Cutting ◽  
Physics Simulation

The physical simulation of high-speed cutting (HSC) is a hot research in cutting field. Dynamic physical simulation is the key technical difficulty of physical simulation. It can afford the machining process parameters quickly and efficiently, such as cutting stress, cutting temperature, tool wear etc., which have important academic and practical value. The cutting theoretical mathematical model based on the elastic-plastic mechanics and tribology was built up. The two-dimensional / three-dimensional (2D/3D) HSC dynamic physics simulation models were built up by the finite element method. The stress, thermal distribution and tool load etc. during the high speed machining (HSM) was obtained. These parameters provided key technical basis for the establishment and optimization of HSM parameters. They can save much machining experiments cost and improve the processing efficiency.

Microstructure Evolution of Ti-6Al-4V Alloy during High Speed Cutting: An Investigation Using Finite Element Simulation

2013 ◽  
Vol 421 ◽  
pp. 193-200 ◽  
Author(s):  
Tao Cui ◽  
Hong Wei Zhao ◽  
Chuang Liu ◽  
Ye Tian
Keyword(s):  
Grain Size ◽  
Dynamic Recrystallization ◽  
Microstructure Evolution ◽  
Chip Formation ◽  
High Speed ◽  
Shear Bands ◽  
Cutting Temperature ◽  
Serrated Chip ◽  
High Speed Cutting ◽  
Serrated Chip Formation

In this paper, a novel model combining the microstructure prediction model and a modified constitutive model of the Johnson-Cook (JC) model was developed and embedded into FEM software via the user subroutine. The chip formation and microstructure evolution in high speed cutting of Ti-6Al-4V alloy were simulated based on the presented model. The results indicated that dynamic recrystallization mainly happened in ASBs, where the grain size had a big decline. According to the variation of cutting temperature and grain size of microstructure, the mechanism of the adiabatic shear bands (ASBs) formation was investigated deeply and concluded that dynamic recrystallization was the root cause of the serrated chip formation.

Control of Machining Process for Titanium Alloy Based on Green Cooling and Lubricating Technology

2012 ◽  
Vol 580 ◽  
pp. 7-11
Author(s):  
Yue Zhang ◽  
Li Han ◽  
You Jun Zhang ◽  
Xi Chuan Zhang
Keyword(s):  
Titanium Alloy ◽  
Water Vapor ◽  
High Speed ◽  
Cutting Temperature ◽  
Small Diameter ◽  
Machining Process ◽  
Machined Surface ◽  
Cutting Zone ◽  
Cutting Experiments ◽  
Special Control

The machining process of titanium alloys always need special control by using coolant and lubricant as it is one of the difficult-to-cut materials. The cutting experiments are carried out based on green cooling and lubricating technology. To achieve green cutting of titanium alloy Ti-6Al-4V with water vapor cooling and lubricating, a minitype generator is developed. Compared to dry and wet cutting, the using of water vapor decreases the cutting force and the cutting temperature respectively; enhances the machined surface. And it can help to chip forming and breaking. Water vapor application also improves Ti-6Al-4V machinability. The excellent cooling and lubricating action of water vapor could be summarized that water molecule has polarity, small diameter and high speed, can be easily and rapidly to proceed adsorption in the cutting zone. The results indicate that the using of water vapor has the potential to attain the green cutting of titanium alloy.

Vibrations in High Speed Boring Process of Bioengineering Polymers

2016 ◽  
Vol 856 ◽  
pp. 125-128
Author(s):  
Athanasios G. Mamalis ◽  
G. Tokhtar ◽  
Sergiy Lavrynenko
Keyword(s):  
High Speed ◽  
Cutting Process ◽  
Machining Process ◽  
Effective Alternative ◽  
High Quality ◽  
High Speed Cutting ◽  
Operation Control

At the present time the polymers are reliable and effective alternative to more traditional materials for many applications especially for bioengineering. Achievement of high quality biopolymeric components demands particular conditions for the machining process and its control. This report is devoted to method for operation control of the high speed cutting process by measurement of vibrating acceleration.

Finite Element Simulation on High Speed Cutting of Hardened 45 Steel Based on ABAQUS

2013 ◽  
Vol 579-580 ◽  
pp. 202-207
Author(s):  
Guo He Li ◽  
Hou Jun Qi ◽  
Bing Yan
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
Finite Element Simulation ◽  
High Speed ◽  
Cutting Temperature ◽  
Cutting Parameters ◽  
Cutting Process ◽  
High Speed Cutting ◽  
Geometry Model ◽  
Element Simulation

For the high speed cutting process of hardened 45 steel (45HRC), a finite element simulation of cutting deformation, cutting force and cutting temperature is finished with the large general finite element software ABAQUS. Through the building of geometry model, material model and heat conduction model, also the determination of boundary conditions, separation rule and friction condition, a thermal mechanical coupling finite element model of high speed cutting for hardened 45 steel is built. The serrated chip, cutting force and cutting temperature can be predicted. The comparison of experiment and simulation shows the validity of the model. The influence of cutting parameters on cutting process is investigated by the simulation under different cutting depthes and rake angles. The results show that as the increase of rake angle, the segment degree, cutting force and cutting temperature decrease. But the segment degree, also the cutting force and cutting temperature increase with the increase of cutting depth. This study is useful for the selection of cutting parameters of hardened steel.

Development of Super-Hard Cutter Material

2013 ◽  
Vol 341-342 ◽  
pp. 3-7
Author(s):  
Hui Ying Feng ◽  
Xiao Jing Li
Keyword(s):  
High Speed ◽  
Cubic Boron Nitride ◽  
Tool Material ◽  
Polycrystalline Diamond ◽  
Machining Process ◽  
Main Research ◽  
High Speed Cutting ◽  
Finished Surface ◽  
Materials Used ◽  
Surface Precision

Super-hard tool material is a main research point of mechanical engineering because of excellent performance. The development of technology for high-speed cutting process could enhance the machining quality and surface precision. It is a difficulty thing to get higher finished surface for traditional machining process. However, the super-hard cutter material could enhance the finished performance of tool material. For example, the wearing resistance, high stability of PCD (polycrystalline diamond) and PCBN (poly cubic boron nitride) can get more information for obtaining higher finished surface quality. The author introduces super-hard cutters materials (PCD and PCBN) development, and discusses several material properties. The features of materials used in different cutting fields are discussed.

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