Design and Calculation of Explosion Rotary Cutting Deformation Test Device

2016 ◽  
Vol 693 ◽  
pp. 275-281
Author(s):  
Si Yuan Xie ◽  
Wei Hua Wei ◽  
Tong Ming Xue ◽  
De Lai Liu ◽  
Jing Wei Xu ◽  
...  
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Cutting Condition ◽  
Test Device ◽  
Physical Strength ◽  
High Speed Cutting ◽  
Calculation Results ◽  
New Type ◽  
Deformation Test ◽  
Cutting Deformation

In this paper, a new type of explosive rotary quick-off tools device is designed. This new type of explosion rotary quick-off tools test device is composed of foundation, explosion chamber, piston body, pressure plate, locking wedge and customized tools, which has many advantages such as simple structure, convenient operation and high rigidity. The calculation results of the acceleration of tool-falling, plate strength, physical strength of combustion show that the device is expected to obtain complete chip root samples at 150m/min speed conditions, which can meet the requirements of researching metal cutting deformation process at high-speed cutting condition.

Design of New Type High-Speed Cutting Deformation Test Device

2016 ◽  
Vol 693 ◽  
pp. 73-76
Author(s):  
Wei Hua Wei ◽  
Si Yuan Xie ◽  
Tong Ming Xue ◽  
De Lai Liu ◽  
Jing Wei Xu ◽  
...  
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Simple Structure ◽  
Explosion Chamber ◽  
Test Device ◽  
Pressure Plate ◽  
High Speed Cutting ◽  
New Type ◽  
Deformation Test ◽  
Cutting Deformation

To study the mechanism of metal cutting deformation, we invented a new type of explosion rotary quick-off tools test device which was based on absorbing advantages of existing cutting deformation test device. So that the tool can be separated from the workpiece with a larger acceleration and the complete chip root samples can be obtained. This new type of explosion rotary quick-off tools test device composed of foundation, explosion chamber, piston body, pressure plate, locking wedge and customized tools, which has many advantages such as simple structure, convenient operation and high rigidity.

An Integral Method to Determine Workpiece Flow Stress and Friction Characteristics in Metal Cutting

2015 ◽  
Vol 9 (6) ◽  
pp. 775-781
Author(s):  
Norfariza Wahab ◽  
◽  
Yumi Inatsugu ◽  
Satoshi Kubota ◽  
Soo-Young Kim ◽  
...  
Keyword(s):  
Flow Stress ◽  
Strain Rate ◽  
Cutting Forces ◽  
High Speed ◽  
Metal Cutting ◽  
Cutting Edge ◽  
Cutting Process ◽  
Machining Parameters ◽  
Friction Characteristics ◽  
High Speed Cutting

In recent times, numerical simulation techniques have been commonly used to estimate and predict machining parameters such as cutting forces, stresses, and temperature distribution. However, it is very difficult to estimate the flow stress of a workpiece and the friction characteristics at a tool/chip interface, particularly during a high-speed cutting process. The objective of this study is to improve the accuracy of the present method and simultaneously determine the characteristics of the flow stress of a workpiece and friction at the cutting edge under a high strain rate and temperature during the cutting process. In this study, the Johnson-Cook (JC) flow stress model is used as a function of strain, strain rate, and temperature. The friction characteristic was estimated by minimizing the difference between the predicted and measured results of principal force, thrust force, and shear angle. The shear friction equation was used to estimate the friction characteristics. Therefore, by comparing the measured values of the cutting forces with the predicted results from FEM simulations, an expression for workpiece flow stress and friction characteristics at the cutting edge during a high-speed cutting process was estimated.

Lattice Light Steel Frame System and Application

2011 ◽  
Vol 105-107 ◽  
pp. 1110-1113
Author(s):  
Bo Ding ◽  
Huan Qing Jiang ◽  
Hong Xia Wan ◽  
Feng Zhang
Keyword(s):  
High Speed ◽  
Design Method ◽  
Calculation Model ◽  
Steel Frame ◽  
Calculation Results ◽  
Frame System ◽  
Practical Engineering ◽  
Steel Consumption ◽  
New Type ◽  
New System

Lattice light steel frame is a new type of structural system, combining general steel framework which is composed of lattice column and lattice beam with lattice light steel keel of the partitions and floors, the system takes full advantages of both structural systems, with high speed construction, less steel consumption, good earthquake-resistance etc., and possesses good prospects. The paper describes the system construction approach and the characteristics of lattice light steel frame system, and provides a project example of a villa. The design method and calculation model of the project are presented. Calculation results meet the specifications’ requirements, proving the new system can be applied to practical engineering. The paper gives guidance for application and research of this new system.

Experiment Study of Serrated Chip and Surface Roughness of High Speed Cutting of Ti6Al4V

2014 ◽  
Vol 800-801 ◽  
pp. 571-575
Author(s):  
Guo He Li ◽  
Yu Jun Cai ◽  
Hou Jun Qi
Keyword(s):  
Surface Roughness ◽  
High Speed ◽  
Cutting Speed ◽  
Rake Angle ◽  
Adiabatic Shear ◽  
Cutting Condition ◽  
Experiment Study ◽  
Cutting Depth ◽  
Serrated Chip ◽  
High Speed Cutting

Under the condition of cutting speed 10-300m/min, rake angle -10°、0°、10°and cutting depths 0.05mm、0.1mm and 0.2mm, the experiment study of adiabatic shear serrated chip and surface roughness are carried out. The influence of cutting condition on serrated chip is analyzed through the metallographic observation of obtained chip. By the measurement of finished surface, the influenc of cutting condition and adiabatic shear on surface roughness is also investigated. The rusults show that the reason lead to serrated chip in high speed cutting of Ti6Al4V is adiabatic shear, not the periodic fracture.The adiabatic shear serrated chip is easier appear and the degree of segment is more large under the condition of higher cutting speed, larger cutting depth and smaller rake angle. The surface roughness is smaller when the cutting speed is higher, cutting depth is larger, and rake angle is smaller.

Transformation of Cutting Burr/Fracture in High-Speed Machining Al Alloy

2008 ◽  
Vol 53-54 ◽  
pp. 101-107 ◽  
Author(s):  
Qin Xi Shen ◽  
Gui Cheng Wang ◽  
Yun Ming Zhu ◽  
Hai Jun Qu
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Element Model ◽  
Scientific Basis ◽  
Burr Formation ◽  
Cutting Condition ◽  
Al Alloy ◽  
High Speed Machining ◽  
Fracture Formation ◽  
Transformation Condition

The metal cutting burr is one of the factors that influence the edge quality and performance of precision parts.A finite element model has been established to investigate the mechanism of burr formation and limit transformation in high-speed machining 2024Aluminum alloy .The burr/fracture formation process is simulated with elastic-plastic nonlinear element method based on ABAQUS.This paper has investigated the mechanism of burr /fracture formation and the limit transformation condition of cutting-direction burrs and fractures in high-speed machining and the limit transformation condition change with the cutting condition,which lay scientific basis of further research on cutting burrs formation and its minimization and deburring technology.

Oxidation Behavior and Cutting Performance between Ti0.75-Al0.25-N and Ti0.69-Al0.23-Si0.08-N Coated Tool through Measurement of Cutting Temperature

2008 ◽  
Vol 569 ◽  
pp. 141-144
Author(s):  
Suk Hoon Shin ◽  
Chul Kim ◽  
Dong Gyu Ahn ◽  
Kwang Ho Kim ◽  
Myung Chang Kang
Keyword(s):  
Oxidation Resistance ◽  
High Speed ◽  
Oxidation Behavior ◽  
Cutting Temperature ◽  
Cutting Condition ◽  
High Speed Cutting ◽  
Aisi D2 ◽  
End Mills ◽  
Cold Worked ◽  
Coated Carbide

Ti-Al-Si-N and Ti-Al-N coatings were deposited on WC-Co substrates by a DC magnetron sputtering method. The oxidation behavior of two kinds of Ti0.75Al0.25N and Ti0.69Al0.23Si0.08N coatings were comparatively investigated by XRD patterns and GDOES depth profiles. Si addition of 8 at.% into Ti-Al-N film modified its microstructure to a fine composite comprising, Ti-Al-N crystallites and amorphous Si3N4, and to a smoother surface morphology. While the solid solution Ti0.75Al0.25N film had superior oxidation resistance up to around 700°C, the composite Ti-Al-Si-N film showed further enhanced oxidation resistance. Both Al2O3 and SiO2 layers played roles as a barrier against oxygen diffusion for the quaternary Ti-Al-Si-N film, whereas only the Al2O3 oxide layer formed at surface did a role for the Ti-Al-N film. The cutting performances of two coated carbide ball-end mills were evaluated by cutting of AISI D2 cold-worked die steel (60 HRC) under high-speed cutting condition. The tool wear and cutting temperature are discussed along with coating characteristics.

The use of assembled cutting tool with damping elements to reduce mechanical vibrations

2021 ◽  
Author(s):  
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Cutting Tool ◽  
End Mill ◽  
Mechanical Vibrations ◽  
Machined Surface ◽  
High Speed Cutting ◽  
End Mills ◽  
Cutting Modes

Aspects of vibration reduction during machining on metal-cutting machines to improve the quality of machined surfaces at moderate and high-speed cutting modes are considered. End mills with damping elements made of different materials, which provide the control of tool rigidity, are developed. Keywords: vibrations, end mill, vibrations, machined surface, damping. [email protected]

Characters of Deformation and Surface Quality and Cutter Wearing at High-Speed Cutting

2020 ◽  
Vol 980 ◽  
pp. 136-143
Author(s):  
Hu Ping An ◽  
Zhi Yuan Rui ◽  
R. Iyer
Keyword(s):  
Surface Quality ◽  
High Speed ◽  
Cutting Speed ◽  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel ◽  
High Speed Cutting ◽  
Metal Ceramic ◽  
Cutting Deformation ◽  
The Impact

In this paper, the impact of cutting speed and feed amount on cutting deformation and surface quality and cutter wear have been studied by the test of high manganese steel cutting with metal ceramic tool at high speed. The results show that it is feasible by cutting high manganese steel with cermet tool at high-speed cutting (HSC). Chip changes into succession segment from band in macrostate. Sawteeth can be seen on the top surface of chip while high temperature feature in burning color and cold welding form appear on the bottom of the chip. The model of surface roughness built can be used to predict surface quality at HSC, and provided cutting optimized parameters scheme. Further research indicates that high-speed cutting has its special deformation mechanism and plastic chips exhibit hot brittleness which provides a favorable condition for solving the chip breaking problem in the cutting of high manganese steel.

Numerical Investigation of Microtexture Cutting Tool on Hydrodynamic Lubrication

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Zhengyang Kang ◽  
Yonghong Fu ◽  
Jinghu Ji ◽  
Liang Tian
Keyword(s):  
High Speed ◽  
Hydrodynamic Lubrication ◽  
Friction Pair ◽  
Slope Angle ◽  
Numerical Approach ◽  
Cutting Condition ◽  
Enhancement Effect ◽  
Rake Face ◽  
Textured Surfaces ◽  
High Speed Cutting

The aim of this technical brief is to provide a numerical approach to investigate the lubricity enhancement effect of microgrooves texture on tools' rake face. The key parameters related to cutting condition and grooves morphology were considered in the analytical model of tool–chip friction pair. The fully textured surfaces with the periodic microgrooves were systematically studied by solving the nondimensional Reynolds equation with the multigrid method. The results indicated that the microgrooves texture generates extra carrying capacity comparing to the flat tool and the optimum grooves direction is vertical to the chip sliding. Higher area density and optimum grooves width can further promote hydrodynamic lubrication. By modifying the tool rake face geometry to restrict the tool–chip slope angle, efficiency of surface texture could be greatly extended. In addition, the film's average pressure was nearly proportional to the chip velocity. Hence, the textured tool is more effective in high-speed cutting.

Chip Formation in High-Speed Cutting of Copper and Aluminum

1963 ◽  
Vol 85 (4) ◽  
pp. 365-372 ◽  
Author(s):  
K. J. Trigger ◽  
B. F. von Turkovich
Keyword(s):  
Plastic Deformation ◽  
Chip Formation ◽  
High Speed ◽  
Metal Cutting ◽  
Initial Temperature ◽  
High Speed Machining ◽  
High Speed Cutting ◽  
Work Material ◽  
On Chip ◽  
Cutting Behavior

This paper presents metal-cutting data for the high-speed machining of copper and aluminum, each at two levels of purity, and over a range of workpiece temperatures from −326 deg F (80 deg K) to 550 deg F (560 deg K). It has been found that cutting behavior is influenced by purity of work material, its initial temperature, and extent of tool-chip contact. The influence of plastic deformation on chip hardness has been found to be intimately associated with the purity of the work material.

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