scholarly journals Analysis of the tool life of coated hob milling tools for gear cutting of cylindrical gear

2018 ◽  
Vol 184 ◽  
pp. 03011 ◽  
Author(s):  
Sandra Sovilj-Nikić ◽  
Bogdan Sovilj ◽  
Gyula Varga ◽  
Nicolae Ungureanu ◽  
Vladimir Blanuša
Keyword(s):  
Tool Life ◽  
Production Equipment ◽  
Cutting Process ◽  
Cylindrical Gear ◽  
Process Improvements ◽  
Cylindrical Gears ◽  
Gear Cutting ◽  
Milling Tool ◽  
Continuous Demand ◽  
Milling Tools

The improvement of the gear cutting process by hob milling is also significant for the producers of gears as well as for the producers of hob milling tools. Due to the complexity of the process, the high values of the gears, and in particular the hob milling tool, the research of the bases for optimizing the process of gear cutting by hob milling requires significant financial resources and significant efforts of the researchers. In the modern production of gears there is a continuous demand for increasing the economy. In the gear cutting process improvements of the production equipment and materials for the cutting elements of the hob milling tools are necessary. In this paper an analysis of the tool life of coated hob milling tools for gear cutting of cylindrical gears is given. The experimental results have shown that the hob milling tools with inserted combs coated with TiAlN outperform the hob milling tools with inserted combs coated with TiN. They have higher resistance of 60.6 %.

scholarly journals Study of the Wear of the Cutting Edge of Milling Heads

2014 ◽  
Vol 11 (2) ◽  
pp. 32-37
Author(s):  
Dana Stancekova ◽  
Jozef Pilc ◽  
Jozef Struharnansky ◽  
Miroslav Janota ◽  
Daniel Varga
Keyword(s):  
Tool Life ◽  
The State ◽  
Cutting Edge ◽  
Primary Contact ◽  
Milling Tool ◽  
Increase Tool Life ◽  
Milling Tools ◽  
Primary Interaction

Abstract The article deals with analysis of the charakter of the interaction of milling tools with cutting edges of the primary contact with the working materials. Based on the monitoring of wear is observed various charakter and intensity of wear of the cutting wedge, which is dependent on the position of the milling tool frame to the workpiece. Given the issue is analyzed in the state, according to the proposed method is the primary interaction of tool and workpiece milling tool, in order to increase tool life.

Rapid Selection of Milling Tools Based on the Initial Wear

2011 ◽  
Vol 188 ◽  
pp. 416-422
Author(s):  
H. Zhang ◽  
Wu Yi Chen
Keyword(s):  
Wear Rate ◽  
Tool Wear ◽  
Tool Life ◽  
Selection Method ◽  
Statistical Regularity ◽  
Life Tool ◽  
Milling Tool ◽  
Cutting Length ◽  
Milling Tools ◽  
Selection Of

In this paper, tool life, tool wear criteria, initial wear and cutting length at initial wear are picked out from 295 milling tool wear curves to calculate initial wear rate K0, final wear rate K1 and the ratio K between the two. By statistic analysis of K0, K1 and K, a statistical regularity between K0 and K1 is found, which indicates that the faster the initial wear, the shorter the tool life would be. Based on the statistical regularity, a milling tool rapid selection method is proposed, and an experiment on selecting the best tools for machining TC4 is carried out to verify the method. The results show that the method can reduce the consumption of material and time significantly, which confirm the efficiency of the method.

scholarly journals Analysis of Roughness Parameters of Lateral Back Surfaces of Model Hob Milling Tools During Cylindrical Gear Cutting

2018 ◽  
Vol 3 (2) ◽  
pp. 63-71 ◽  
Author(s):  
Ivan Sovilj-Nikić ◽  
Sandra Sovilj-Nikić ◽  
Bogdan Sovilj ◽  
Ivan Samardžić ◽  
Dražan Kozak ◽  
...  
Keyword(s):  
Roughness Parameters ◽  
Cylindrical Gear ◽  
Gear Cutting ◽  
Milling Tools

scholarly journals Tribological researches of triboelements topography of hob milling process of cylindrical gear serration

2019 ◽  
Vol 287 ◽  
pp. 05003
Author(s):  
Bogdan Sovilj ◽  
Sandra Sovilj-Nikic ◽  
Juliana Javorova
Keyword(s):  
Milling Process ◽  
Work Piece ◽  
Cylindrical Gear ◽  
Geometrical Accuracy ◽  
Gear Cutting ◽  
Milling Tool ◽  
Required Quality

Hob milling process is one of the most important links in the chain of machining because productivity, final geometrical accuracy and gear cutting are very dependent on it. The quality of the machining of gear serration is one of the conditions for achieving the required quality of the work-piece. In this paper the methodology for the identification of topography of tool teeth and gear serration produced by uncoated and coated model and real hob milling tool is presented.

Actually Geometry of Milling Tool Involved in Cutting Process

2012 ◽  
Vol 723 ◽  
pp. 394-400 ◽  
Author(s):  
Zhen Yu Shi ◽  
Zhan Qiang Liu ◽  
Bing Wang
Keyword(s):  
Cutting Force ◽  
Cutting Tool ◽  
Helix Angle ◽  
Cutting Process ◽  
Tool Geometry ◽  
Milling Tool ◽  
Sphere Radius ◽  
On Chip ◽  
Set Up ◽  
Milling Tools

The effect of cutting tool geometry has long been an issue in understanding mechanics of cutting process. Tool geometry has significant influence on chip formation, heat generation, tool wear, surface finish and surface integrity during cutting process. This paper presents the actually geometry of milling tool involved in cutting process based on mathematics analytical methods including matrix translation and rotation. Results show that according to the different helix angle and tool fluted, the geometry of cutting tool involved in cutting is different. For two or three-fluted mirco-milling tools, no mater helix angle is 30 or 45, the actually geometry involved in cutting is sphere. Different cutting tool corresponds to different sphere radius. Experiments were set up to validate the effect of cutting tool geometry on cutting forces. Results show that the smaller of the sphere radius of cutting tool, the lower of the cutting force; the larger of the sphere radius, the higher of the cutting force.

Development of an Intelligent CAD System for Involute Cylindrical Gear Cutting Tools

2014 ◽  
Vol 532 ◽  
pp. 249-252
Author(s):  
Ying Hua Liao ◽  
Gao Jun Liu ◽  
Xiang Guo Sun
Keyword(s):  
Expert Knowledge ◽  
Cutting Tools ◽  
3D Models ◽  
Tool Design ◽  
Cylindrical Gear ◽  
Intelligent Cad ◽  
Forward Reasoning ◽  
Cad System ◽  
Gear Cutting ◽  
2D And 3D

An intelligent CAD system for Involute cylindrical gear cutting tools is developed by VC++ and SQL server, and it includes four modules, such as user interface, instance query, intelligent gear tool design and database. The intelligent gear tool design is the key to the intelligent CAD system, and it is based on the forward reasoning production system, and as the Intelligent reasoning technology is used for gear tool design, a lots of expert knowledge could be made full use of. The design results by the developed intelligent CAD system are more reasonable than those by a traditional CAD system, and the efficiency and quality of the gear tool design also could be improved. The developed intelligent CAD system supports both 2D and 3D models, which can lay foundation for CAD/CAE/CAM integration of gear cutting tools.

Construction of conical axoids on the basis of congruent spherical ellipses

2022 ◽  
Vol 113 (1) ◽  
pp. 13-18
Author(s):  
T. Kresan ◽  
S. Pylypaka ◽  
Z. Ruzhylo ◽  
C. Rogovskii ◽  
O. Trokhaniak
Keyword(s):  
Design Methodology ◽  
Bevel Gear ◽  
Geometric Parameters ◽  
Cylindrical Gear ◽  
Bevel Gears ◽  
Cylindrical Gears ◽  
Practical Implications ◽  
Angle Of Rotation

Purpose: To carry out the transition from a cylindrical gear in which the centroids are congruent ellipses with centres of rotation in the foci, to a bevel gear on the basic of congruent spherical ellipses. Design/methodology/approach: Congruent ellipses with centres of rotation in the foci serve as centroids for the design of cylindrical gears with non-circular wheels. The article analytically shows that the analogues of ellipses on the plane - congruent spherical ellipses are the basis for the construction of the axoids of the corresponding bevel gears. An analogue of the centre-to-centre distance for ellipses in the plane is the angle between the axes of rotation of conical axoids. Findings: Based on the equality of the arcs of ellipses, the dependence of the angle of rotation of one axoid on the angle of rotation of another is found. Graphs of this dependence for separate cases are given. It is shown under what conditions the axes of axoids intersect at right angle. The parametric equations of spherical ellipses and corresponding axoids are given. They were used to construct spherical ellipses and corresponding conical axoids for different cases. For gears with right angle between the axes, separate positions of the axoids with different angles of their rotation around their axes are constructed. Practical implications: Spherical ellipses are directing curves for the construction of the corresponding conical axoids. Originality/value: The paper shows that congruent spherical ellipses act as centroids for the design of axoids of bevel gears. They roll one by one without sliding, rotating around axes that intersect in the centre of the sphere. To design such gears, it is important to know the interdependence between the geometric parameters, especially for common gears with a right angle between the axes.

scholarly journals Experimental study on the working performance of different milling tools for multistage fracturing ball seats

2020 ◽  
Vol 17 (6) ◽  
pp. 1699-1716
Author(s):  
Jia-Qi Che ◽  
Han-Xiang Wang ◽  
Yan-Wen Zhang ◽  
Ming-Chao Du ◽  
Shao-Hua Ma
Keyword(s):  
Wear Resistance ◽  
Large Diameter ◽  
Cutting Speed ◽  
Bottom Surface ◽  
Analysis Model ◽  
Abrasive Grain ◽  
Milling Tool ◽  
Working Performance ◽  
Milling Tools ◽  
Working Efficiency

AbstractTo achieve the secondary production in multistage fracturing wells of tight oil, milling tools are usually used to remove the multistage fracturing ball seats to achieve production with a large diameter in later. In this paper, first of all, the working mechanism of milling tools for multistage fracturing ball seats was studied and a mechanical analysis model of single abrasive grain was established. Then, an experimental system for milling tools was developed, and the experimental tests of the flat, the blade, and the slope milling tool were conducted in order. Besides, the morphology of chips and the surface morphology of the workpiece after the experiment were analyzed. Also, the working performance of milling tools was evaluated from the perspectives of working safety, working efficiency, and wear resistance of the milling tool. The results show that the torque of the milling tool increases nonlinearly with the increase in the cutting depth of the abrasive grain and increases linearly with the increase in the cutting width. Also, the chips are irregular particles and the size is mainly from 10 to 50 μm. So, the chips should be pumped up with a small pump pressure and a large displacement. Besides this, the cutting depths of the abrasive grains are from 216.20 to 635.47 μm and the bottom surface of the milling tool should be eccentric to avoid the zero point of cutting speed. Furthermore, the torque of the slope milling tool is 23.8% larger than that of the flat milling tool, which is also 30.4% smaller than that of the blade milling tool. Compared with the flat milling tool, the working efficiency of the blade milling tool improves by 79.9% and the slope milling tool improves by 111.1%. Also, the wear resistance of the blade milling tool decreases by 102.7%, while the slope milling tool declines by 32.6% when compared with the flat milling tool. Therefore, the slope milling tool has the characteristics of moderate torque, stable working conditions, the highest working efficiency, and fine wear resistance, which is preferably used to mill multistage fracturing ball seats. This study provides a theoretical basis and guidance for milling multistage fracturing ball seats on-site and realizing production with a large diameter in later stages of multistage fracturing wells.

The influence of the recycled wood proportion in particle boards to the tool life of milling tools

2020 ◽  
pp. 1-5
Author(s):  
Richard Patsch ◽  
Stephan Frömel-Frybort ◽  
Stefanie E. Stanzl-Tschegg
Keyword(s):  
Tool Life ◽  
Milling Tools

Study on Micro Milling Tool with Hot-Pressed Sintered Ti(C7N3)-Based Cermet

2016 ◽  
Vol 693 ◽  
pp. 906-913
Author(s):  
Kai Tao Xu ◽  
Bin Zou ◽  
Chuan Zhen Huang ◽  
Hui Jun Zhou ◽  
Han Lian Liu ◽  
...  
Keyword(s):  
Static Load ◽  
Electrical Discharge Machining ◽  
Negative Impact ◽  
Micro Milling ◽  
Stress And Strain ◽  
End Mill ◽  
Milling Performance ◽  
Milling Tool ◽  
Minimum Stress ◽  
Milling Tools

Micro milling is most flexible to create 3D features for application. However, how to design and fabrication of high precision micro milling tools are one of big challenges for mechanical micro milling. Commercially available micro milling tools are usually simply made from downsizing of macro milling tools, which have negative impact on milling performance. Therefore, in this paper, firstly, various structural of micro milling tools were optimized with abaqus that investigated stress and strain under certain static load on the cutting edges. Then, results showed the minimum stress and strain was a micro hexagonal end mill. Finally, a Ti (C7N3) cermet micro hexagonal end mill with a radius of 0.5mm was fabricated by wire electrical discharge machining, and the evaluation experiments for the hexagonal mill have been processed on a micro milling centre.

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