scholarly journals A Thermal and Biological Analysis of Bone Drilling

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
Maziar Aghvami ◽  
John B. Brunski ◽  
U. Serdar Tulu ◽  
Chih-Hao Chen ◽  
Jill A. Helms
Keyword(s):  
High Speed ◽  
Thermal Damage ◽  
Cutting Tools ◽  
Biological Assessment ◽  
Patient Specific ◽  
Osteotomy Site ◽  
High Speed Cutting ◽  
Clinical Control ◽  
Drill Diameter ◽  
Osteocyte Death

With the introduction of high-speed cutting tools, clinicians have recognized the potential for thermal damage to the material being cut. Here, we developed a mathematical model of heat transfer caused by drilling bones of different densities and validated it with respect to experimentally measured temperatures in bone. We then coupled these computational results with a biological assessment of cell death following osteotomy site preparation. Parameters under clinical control, e.g., drill diameter, rotational speed, and irrigation, along with patient-specific variables such as bone density were evaluated in order to understand their contributions to thermal damage. Predictions from our models provide insights into temperatures and thresholds that cause osteocyte death and that can ultimately compromise stability of an implant.

The Application of FEA in High-Speed Cutting

2011 ◽  
Vol 287-290 ◽  
pp. 104-107
Author(s):  
Lian Qing Ji ◽  
Kun Liu
Keyword(s):  
High Speed ◽  
Feeding Rate ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Material Model ◽  
Friction Model ◽  
Cutting Depth ◽  
High Speed Cutting ◽  
Key Technologies

The history and application of the FEA are briefly presented in this paper. Several key technologies such as the building of material model, the establishment of the chip - tool friction model as well as meshing are described. Taking the high-speed cutting of titanium alloy (Ti - 10V - 2Fe - 3Al) as an example , reasonable cutting tools and cutting parameters are determinted by simulating the influences of cutting speed, cutting depth and feeding rate on the cutting parameters using FEA.

The Application of FEA in High-Speed Cutting Tool

2011 ◽  
Vol 314-316 ◽  
pp. 1258-1261
Author(s):  
Lian Qing Ji ◽  
Kun Liu
Keyword(s):  
Titanium Alloy ◽  
Cutting Force ◽  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Cutting Temperature ◽  
Material Model ◽  
Friction Model ◽  
High Speed Cutting ◽  
Key Technologies

The history and application of the FEA are briefly presented in this paper. Several key technologies such as the building of material model, the establishment of the chip - tool friction model as well as meshing are described. Taking the high-speed cutting of titanium alloy (Ti - 10V - 2Fe - 3Al) as an example , reasonable cutting tools parameters are determined by simulating the influences of cutting temperature, cutting force on the tools parameters using FEA.

Wear mechanisms of cutting tools in high-speed cutting processes

Wear ◽  
2001 ◽  
Vol 250 (1-12) ◽  
pp. 349-356 ◽  
Author(s):  
Slavko Dolinšek ◽  
Borivoj Šuštaršič ◽  
Janez Kopač
Keyword(s):  
Wear Mechanisms ◽  
High Speed ◽  
Cutting Tools ◽  
High Speed Cutting ◽  
Cutting Processes

scholarly journals Infrared thermography of neurosurgical bone grinding: Determination of high-speed cutting range in order to obtain the minimum thermal damage

2021 ◽  
Author(s):  
Ehsan Shakouri ◽  
Pezhman Ghorbani
Keyword(s):  
Infrared Thermography ◽  
Temperature Rise ◽  
Feed Rate ◽  
Minimum Temperature ◽  
High Speed ◽  
Thermal Damage ◽  
Cutting Speed ◽  
Skull Base Tumor ◽  
Temperature Changes ◽  
High Speed Cutting

Abstract One of the main challenges in skull base tumor removal is the thermal damages that occur in response to grinding the skull bone. During this process, temperature rise occurs at the site of bone grinding, and may cause irreversible thermal damage to the bone, nerves, and arteries. The aim of the present research is to study temperature changes during high-speed grinding of bone via infrared thermography to determine the threshold of high-speed cutting range (HSC-range) in order to achieve the minimum temperature rise and minimize the resulting thermal damages. Experimental tests have been performed in 75 states using the parameters of cutting speed (25 states) and feed rate (3 states) on bovine femur samples. The temperature changes of bone have been measured through infrared thermography. The results indicated that temperature rise had a direct relationship with the tool feed rate. Further, the cutting speed of 250 m.min− 1 at different feed rates was the HSC-range threshold, after which a descending trend of temperature rise emerged; each led to the minimum temperature rise and beyond HSC-range, the temperature rise found an ascending trend. Thus, in order to reduce the thermal damage in neurosurgical bone grinding, the following parameters are suggested as follows: cutting speed 350–425 m.min− 1 for the feed rate 20 mm.min− 1 (ΔT = 4.8–8.5°C ); cutting speed 500–550 m.min− 1 for the feed rate 30 mm.min− 1 (ΔT = 7.2–9.3°C), and cutting speed 650–675 m.min− 1 for the feed rate 40 mm.min− 1 (ΔT = 10-12.5°C).

Main Features of High Speed Machining Chucks and their Selection

2019 ◽  
Vol 814 ◽  
pp. 217-223
Author(s):  
Gui Cheng Wang ◽  
Tao Pang ◽  
Guo Yong Xu ◽  
Ding Jiang
Keyword(s):  
Theoretical Basis ◽  
High Speed ◽  
Cutting Tools ◽  
High Speed Machining ◽  
Rational Selection ◽  
High Speed Cutting ◽  
Main Application ◽  
Technical Requirements ◽  
Comprehensive Performance ◽  
Selection Of

With the development of high-speed machining technology, new technical requirements have been put forward for the clamping of high-speed cutting tools. The traditional clamping methods can not meet the needs of high-speed machining. In this paper, the comprehensive performance of high-speed chucks is systematically compared and analyzed, and the characteristics and main application areas of various high-speed chucks are sorted out, which provides a theoretical basis for scientific and rational selection of chucks.

I.—The Genesis of Tungsten Ores

1918 ◽  
Vol 5 (5) ◽  
pp. 193-203
Author(s):  
R. H. Rastall
Keyword(s):  
High Speed ◽  
Large Scale ◽  
Sodium Tungstate ◽  
Close Association ◽  
Cutting Tools ◽  
Industrial Applications ◽  
Remarkable Effect ◽  
High Speed Cutting ◽  
Textile Fabrics ◽  
Tungstic Oxide

The exploitation of tungsten ores on a large scale is of comparatively recent development. Till lately the industrial applications of this metal and its compounds were very limited, and they were regarded rather in the light of chemical and mineralogical curiosities. In fact, the tungsten minerals were considered a nuisance by miners, owing to the difficulty of separating them from other valuable and equally heavy ores occurring in close association with them. Sodium tungstate was manufactured to a certain extent and used as a mordant in dyeing and for rendering textile fabrics fireproof, and tungstic oxide was sometimes employed in the making of yellow glass. About the year 1905 a demand arose for the metal for electric lamp filaments, but at the present time by far the most important application is in the metallurgy of steel. The addition of a small quantity of tungsten, not more than 7 or 8 per cent, together with about 5 per cent of chromium, has a remarkable effect on steel, rendering it both hard and tough and suitable for high-speed cutting tools. Since the beginning of the War the demand for the ores for this purpose has enormously increased, as also has the price; new sources are being sought for and opened up in many localities; in Colorado and California there was a few months ago a tungsten boom recalling the gold rushes of the early days.

Efficiency Comparison of Cutting Strategies for End Milling Processes Under Feedrate Scheduling

2008 ◽  
Vol 2 (5) ◽  
pp. 377-383 ◽  
Author(s):  
Soichi Ibaraki ◽  
◽  
Atsushi Matsubara ◽  
Masanori Murozumi ◽  
Keyword(s):  
High Speed ◽  
Job Shop ◽  
End Milling ◽  
Cutting Tools ◽  
Depth Of Cut ◽  
High Speed Cutting ◽  
Machining Conditions ◽  
Feedrate Scheduling ◽  
Major Player ◽  
Manufacturing Applications

Technical advances in high-speed machining centers and cutting tools have made high-speed cutting a major player in manufacturing applications, but high-speed cutting provides higher machining efficiency only when machining conditions are appropriately set. In contrast, expert job shop operators often choose a heavy cutting strategy subject to higher depth of cut and a lower feedrate. Feedrate scheduling schemes are widely recognized as practically feasible for optimizing machining conditions in high-speed cutting. We compared the productivity of high-speed milling and heavy milling, assuming that using feedrate scheduling optimizes machining conditions. Possible cutting strategies are interpreted as constraints on cutting conditions or cutting performance, then machining conditions are scheduled optimally to maximize the productivity. A case study illustrates these points.

Analysis of the Complex Parts NC Cutting Parameter Selection and Optimization

2013 ◽  
Vol 443 ◽  
pp. 290-293
Author(s):  
Bo Tang
Keyword(s):  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Parameter Selection ◽  
Numerical Control ◽  
High Speed Cutting ◽  
Cutting Parameter ◽  
Cutting Parameter Optimization ◽  
Set Up ◽  
Complex Parts

In the study of high speed cutting technology of complex parts, cutting methods and techniques must be closely combined with the selection of geometric parameters of cutting tool materials and cutting tool integrated. Numerical control machine tools and cutting tools without good guidance technology, cannot give full play to the advantages of NC machining. Based on this, this article mainly aimed at the complex parts NC cutting parameter selection, therefore cutting parameter optimization mathematical model is set up, and optimize it.

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