The Application of Cryogenic Pneumatic Mist Jet Impinging in High-Speed Milling of Ti-6Al-4V

2006 ◽  
Vol 315-316 ◽  
pp. 244-248 ◽  
Author(s):  
Qing Long An ◽  
Yu Can Fu ◽  
Jiu Hua Xu
Keyword(s):  
High Pressure ◽  
High Speed ◽  
High Efficiency ◽  
Air Cooling ◽  
High Speed Milling ◽  
Cold Air ◽  
Cutting Zone ◽  
Cooling Effects ◽  
Cooling Technology ◽  
Cooling Methods

To solve the problems caused by high temperature in the cutting zone during high-speed milling of Titanium alloys, some cooling methods are employed, such as cold air cooling, high pressure coolant jet impinging, MQL, etc. But all have their shortfalls, both in cooling efficiency and environmental pollution. Here a new high efficiency cooling technology-cryogenic pneumatic mist jet impinging (CPMJI) cooling technology is offered. In this technology, a little quantity of coolant is carried by high pressure cryogenic air (-20) and reaches the machining zone in the form of mist jet. This paper mainly focuses on the cooling effects of CPMJI in high-speed milling of Titanium alloy Ti-6Al-4V, as compared with dry, cold air cooling and MQL conditions. CPMJI greatly reduced the temperature in cutting zone and flank wear of tool.

The Cooling Effects of Cryogenic Pneumatic Mist Jet Impinging in Grinding of Titanium Alloy

2006 ◽  
Vol 304-305 ◽  
pp. 575-578 ◽  
Author(s):  
Qing Long An ◽  
Yu Can Fu ◽  
Jiu Hua Xu ◽  
Hong Jun Xu
Keyword(s):  
Heat Transfer ◽  
High Pressure ◽  
High Efficiency ◽  
Energy Requirements ◽  
Enhance Heat Transfer ◽  
Cooling Effects ◽  
Cooling Technology ◽  
High Specific Energy ◽  
Cooling Methods ◽  
Zone Temperature

Grinding is inherently characterized by high specific energy requirements, a high grinding zone temperature. Many methods have been employed in grinding high grinding zone temperature. But all have their shortfalls, both in cooling environmental pollution. Here a new high efficiency cooling technology—cryogenic mist jet impinging (CPMJI) cooling technology is offered. In this technology, coolant is carried by high-pressure cryogenic air (–20°C) and reaches the machining form of mist jet to enhance heat transfer in machining zone. This paper mainly cooling effects of CPMJI in surface grinding, compared with grinding with compressed flood cooling. CPMJI seems to have better effects than other cooling methods.

Experimental Research on the Cooling Effects of a New High Efficiency Green Cooling Method

2008 ◽  
Vol 53-54 ◽  
pp. 249-253
Author(s):  
Qing Long An ◽  
Yu Can Fu ◽  
Jiu Hua Xu
Keyword(s):  
Heat Transfer ◽  
High Speed ◽  
High Efficiency ◽  
Green Manufacturing ◽  
Grinding Temperature ◽  
Enhance Heat Transfer ◽  
Air Jet ◽  
Cooling Method ◽  
Cooling Effects ◽  
Cooling Technology

With more attention paying to the environment, green manufacturing (GM) has become inevitable trends in 21st century. Green cooling technology as one branch of GM always was one research hotspot in manufacturing. In this paper, a new high efficiency cooling technology based on GM is proposed, called as CPMJ. In this technology, a little quantity of 0 °C water is carried by high pressure cryogenic air (–20 °C) and reaches the grinding zone in the form of high speed mist jet to enhance heat transfer and gain the best cooling effect. Heat transfer experiments and grinding experiments were carried out to evaluate the cooling effects of CPMJ. Experimental results indicated that CPMJ can offer better cooling effects compared with cold air jet and flood cooling method. Grinding temperature was effectively reduced during grinding of titanium alloys with CPMJ.

The application of cold air and nano-MQL as cooling strategy in high speed milling of titanium alloy Ti-6Al-4V: A review

2019 ◽  
Author(s):  
Muhammad Firdaus Zakaria ◽  
Mohd Azlan Suhaimi ◽  
Safian Sharif ◽  
Gi-Dong Yang ◽  
Mohd Sallehuddin Shaharum ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
High Speed ◽  
High Speed Milling ◽  
Cold Air ◽  
Cooling Strategy

scholarly journals Quantitative 4D X-ray microtomography under extreme conditions: a case study on magma migration

2021 ◽  
Vol 28 (5) ◽  
Author(s):  
Elena Giovenco ◽  
Jean-Philippe Perrillat ◽  
Eglantine Boulard ◽  
Andrew King ◽  
Nicolas Guignot ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Pressure ◽  
High Temperature ◽  
High Speed ◽  
High Efficiency ◽  
Morphological Properties ◽  
Extreme Conditions ◽  
Temporal Dimension ◽  
Angular Aperture ◽  
X Ray

X-ray computed tomography (XCT) is a well known method for three-dimensional characterization of materials that is established as a powerful tool in high-pressure/high-temperature research. The optimization of synchrotron beamlines and the development of fast high-efficiency detectors now allow the addition of a temporal dimension to tomography studies under extreme conditions. Presented here is the experimental setup developed on the PSICHE beamline at SOLEIL to perform high-speed XCT in the Ultra-fast Tomography Paris–Edinburgh cell (UToPEc). The UToPEc is a compact panoramic (165° angular aperture) press optimized for fast tomography that can access 10 GPa and 1700°C. It is installed on a high-speed rotation stage (up to 360° s−1) and allows the acquisition of a full computed tomography (CT) image with micrometre spatial resolution within a second. This marks a major technical breakthrough for time-lapse XCT and the real-time visualization of evolving dynamic systems. In this paper, a practical step-by-step guide to the use of the technique is provided, from the collection of CT images and their reconstruction to performing quantitative analysis, while accounting for the constraints imposed by high-pressure and high-temperature experimentation. The tomographic series allows the tracking of key topological parameters such as phase fractions from 3D volumetric data, and also the evolution of morphological properties (e.g. volume, flatness, dip) of each selected entity. The potential of this 4D tomography is illustrated by percolation experiments of carbonate melts within solid silicates, relevant for magma transfers in the Earth's mantle.

Temperature Rise in the Cutting Zone during the High-Speed Milling of Heat-Resistant Alloys

2018 ◽  
Vol 38 (12) ◽  
pp. 1009-1011
Author(s):  
A. Yu. Albagachiev ◽  
E. V. Preobrazhenskaya ◽  
A. S. Krasko ◽  
E. S. Stramtsova
Keyword(s):  
Temperature Rise ◽  
High Speed ◽  
High Speed Milling ◽  
Heat Resistant ◽  
Cutting Zone

scholarly journals Development of High-Efficiency, High-Speed and High-Pressure Ambient Temperature Filling System Using Pulse Volume Measurement

2019 ◽  
Vol 9 (12) ◽  
pp. 2491
Author(s):  
SeBu Oh ◽  
SeHoon Oh ◽  
ByeongRo Min
Keyword(s):  
High Pressure ◽  
Flow Rate ◽  
High Speed ◽  
High Efficiency ◽  
Response Speed ◽  
Volume Measurement ◽  
Economic Feasibility ◽  
Industrial Sectors ◽  
Filling System ◽  
Filling Time

Adjusting the filling pressure is essential to fit the final gas volume when charging a carbonated beverage with high pressure. However, in the previous mechanical carbonated ambient filling system, it was difficult to control and monitor the charging conditions such as pressure, temperature and flow rate. In this study, we have developed a high efficiency carbonated ambient filling system capable of high speed and high pressure filling, by using a pulse type electronic flow-meter. The response speed characteristics of the M(BC) and F(MH) series valves were investigated. LMS Imagine.Lab Amesim (Siemens PLM Software) was used to calculate the charging and discharging time of the system under a high CO2 gas pressure condition. The quantitative and precise charging system was implemented with the change of filling time and monitoring/controlling/correction of flow rate. Moreover, a dual controller of the high-speed pulse output was established and a high-speed data processing/flow rate charging algorithm was applied in the system. The filling variation of the system was in the range of ±3 gram(gr) (standard deviation 0.57). The developed system could be applied to improve the quality of goods and economic feasibility at various industrial sectors.

Structural Levels Model of Performance Behavior and Collaborative Design of High Speed Milling Cutter

2010 ◽  
Vol 102-104 ◽  
pp. 700-704
Author(s):  
Bin Jiang ◽  
Min Li Zheng ◽  
Chang Xing Qi ◽  
Jia He
Keyword(s):  
Collaborative Design ◽  
High Speed ◽  
High Efficiency ◽  
Design Method ◽  
Small Sample ◽  
Functional Domain ◽  
Milling Cutter ◽  
High Speed Milling ◽  
Structural Levels ◽  
Performance Behavior

High speed milling cutter is a representative cutter for high efficiency cutting, there is the indeterminacy induced by small sample and lacking information in evaluating its performance. By the analysis of cutter characteristics, acquires the data of structure, material and cutting parameter affecting the performance of cutter, and constructs structural levels model of performance behavior in designing cutter. Using the theory of axiomatic design, investigates mapping approach among structural domain, material domain and functional domain, and propounds collaborative design method of multilevel high speed milling cutter. Results of performance analysis and high speed milling experiment show that the model indicates the interaction among structural levels of cutter, and the design method makes the performance of cutter satisfy the requirements of safety, stability and high efficiency cutting.

Design on Magnetic Damping Pneumatic Needle Free Syringe with Separate Cylinder and Valve

2013 ◽  
Vol 749 ◽  
pp. 550-553 ◽  
Author(s):  
Ming Di Wang ◽  
Kang Min Zhong ◽  
Wan Ping Sun
Keyword(s):  
High Pressure ◽  
Power Systems ◽  
Power System ◽  
High Speed ◽  
High Efficiency ◽  
Fast Response ◽  
Magnetic Damping ◽  
Compressed Gas ◽  
Micro Hole ◽  
Injection Force

Traditional syringe is using the stainless steel needles to inject the human body, this injection will not only cause pain, but will also cause bleeding in the skin, there is a potential risk of infection, in order to avoid the use of safe risk, needle free injection technology has been the international research hotspot in this field. The important technology of needle free injection is how to achieve drugs jet importing, which need strong drive-force and fast response power systems, so that pulse force will improve the piston of closed drug container to produce transient high pressure to force drugs extruded from micro hole, to form a high-speed jet micro fluidizer, that will penetrate rapidly the skin of the human or animal body to reach the drug absorption best parts. The existing power system is can be roughly divided into three types technically: compressed gas, fuel and hard spring. Traditional compressed gas law need to be equipped with a high-pressure gas storage and air compression device, which is bulky, expensive, energy-intensive and time-consuming, so it is very inconvenient to use. Similar with rocket technology, detonation fuel can provide enough thrust powerful to generate shock waves, but potentially dangerous and unstable factors are indeed worrying. Hard spring as power system is simpler than the above two kind of method, but it is a little difficult to operate. As a solution, adding the effect of permanent magnetic damping, a pneumatic needle free syringe successfully designed with high efficiency, low labor intensity, easy to operate, a slight noise, and adjustable injection force, which is facilitate to the use of clinical staff, and has a very good market prospects.

scholarly journals Modelling and optimization of magnesium alloy milling parameters

2021 ◽  
Vol 13 (3) ◽  
pp. 29-36
Author(s):  
Bogdan Chirita ◽  
◽  
Catalin Tampu ◽  
Eugen Herghelegiu ◽  
Cosmin Grigoras ◽  
...  
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Cryogenic Cooling ◽  
Machining Processes ◽  
Dry Cutting ◽  
Surface Method ◽  
High Feed ◽  
Lightweight Alloys ◽  
Cooling Methods ◽  
Modelling And Optimization

In the pursuit to lighter, less consuming products, manufacturers, especially in aviation and automotive industries, are turning more and more to using lightweight alloys such as the ones based on magnesium. Higher requirements for increased productivity have led to concepts like high-speed machining (HSM), high feed machining (HFM) or high-efficiency machining. Tighter regulations concerning requiring for more environmentally friendly industrial processes led to limitations in the use of cooling liquids and a search for cooling methods with less impact (dry cutting, cryogenic cooling, near dry machining and others). Better machining processes can only be achieved by modelling and optimization. This paper briefly presents the results obtained by our research team concerning the modelling and optimization attempts on face milling of magnesium alloys using different methods: design of experiments (e.g. factorial design, response surface method), fuzzy logic or neural networks.

The Simulation of Cutting Force and Temperature in High-Speed Milling of Ti-6Al-4V

2010 ◽  
Vol 139-141 ◽  
pp. 768-771
Author(s):  
Zhen Chao Yang ◽  
Ding Hua Zhang ◽  
Xin Chun Huang ◽  
Chang Feng Yao ◽  
Jun Xue Ren
Keyword(s):  
Cutting Force ◽  
Cutting Forces ◽  
High Speed ◽  
Cutting Temperature ◽  
General Purpose ◽  
Milling Process ◽  
Maximum Temperature ◽  
High Speed Milling ◽  
Milling Parameters ◽  
Cutting Zone

In order to provide theory basis for optimizing high-speed milling parameters, the high-speed milling process of titanium alloy Ti-6Al-4V was modeled using the commercial general purpose machining software package ADVANTEDGE. Effects of milling parameters like milling speed, feed per tooth, milling depth and milling width on cutting force and temperature were analyzed. The results show that cutting forces decrease with milling speed increasing, and increase with feed per tooth, milling depth and milling width, and the influences of feed per tooth, milling depth and milling width on cutting forces are significant. The maximum temperature in the cutting zone located on the rake face at a distance of about 0.02~0.03 mm from the tool tip. As milling speed and feed per tooth increase, the maximum temperature in the cutting area increases. The milling speed has significant impact on cutting temperature, but the milling depth has little impact.

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