scholarly journals Research on Optimization Method of Tool Path in Five-Axis Process Singular Region

2020 ◽  
Author(s):  
Yujie Wang ◽  
Xin Shen ◽  
Yu Peng ◽  
Lixin Zhao
Keyword(s):  
Mathematical Model ◽  
Tool Path ◽  
Optimization Method ◽  
Rotating Shaft ◽  
Processing Efficiency ◽  
Machined Surface ◽  
Rapid Rotation ◽  
Singular Region ◽  
Axis Of Rotation ◽  
Five Axis

For the five-axis machine into the singular region in the process of parts processing, resulting in a discontinuous and rapid rotation of the axis of rotation of large angles. Based on the analysis of the cause of the obvious ripple on the machined surface and the influence on the machining precision, a mathematical model of the singular region is established, and an optimization method of the tool path in the singular region is proposed. The simulation and practical machining results show that the method can effectively overcome the problem of excessive movement of the rotating shaft in the Song singular region of 5-axis machine tool, and solve the surface corrugated defects caused by the problem, while improving the processing efficiency.

Synthesis of Cutting Tool Placement, Orientation and Motion Based on Surface Analysis

2000 ◽  
Author(s):  
C. G. Jensen ◽  
J. K. Hill ◽  
K. A. White
Keyword(s):  
Tool Path ◽  
Cutting Tool ◽  
A Priori ◽  
Cutting Tools ◽  
Detection Algorithm ◽  
Detection Methods ◽  
Machined Surface ◽  
Mathematical Basis ◽  
Five Axis ◽  
Verification Techniques

Abstract Engineers and designers use a wide variety of curve and surface formulations to describe products. The process of producing the physical shape of these products has remained essentially unchanged for many years. Traditionally, the process of finish surface machining has been error prone and inefficient due in large part to the mathematical basis used to control the positioning, orientation and movement of cutting tools in five-axis machining centers. This paper presents swept silhouette curvature matching algorithms for positioning and orienting a cutter such that tool and surface curvatures match. Formulations are given for both flat and filleted end mill cutters. The benefits of curvature matching are: reduction of local machining errors, reduction or elimination of grinding of the finished machined surface, and the improvement of machine tool efficiency. Examples are given that compare curvature matching to traditional machining methods. The paper concludes by discussing current research into a priori gouge detection methods based on intersection contact between the cutting tool and the design surface or the lower tolerance-bound offset surface to the design surface. An a priori gouge detection algorithm is necessary for the development of optimal tool motion and the reduction of time spent in tool path editing and verification. Techniques involving collinear normals, Bézier clipping, triangulation, normal intersection and swept volumes are suggested as techniques for examining the positional and translational tool gouge problem.

An Algorithm of Non-Iso Parameters Cutting Path Planning Using Toroid Cutter

2013 ◽  
Vol 373-375 ◽  
pp. 2088-2091
Author(s):  
Quan Liang ◽  
Dong Hai Su ◽  
Jie Wang ◽  
Ye Mu Wang
Keyword(s):  
Path Planning ◽  
Trajectory Planning ◽  
Tool Path ◽  
Search Algorithm ◽  
Free Form ◽  
Processing Efficiency ◽  
Planning Algorithm ◽  
Path Planning Algorithm ◽  
Five Axis ◽  
Cutting Path

For the problem of poor processing efficiency of iso-parameter tool path planning algorithm, this paper proposed a non iso-parameter trajectory planning algorithm. First established a mathematical model of five-axis machining toroid cutter, then analyzed the toroid cutter and machining surface partial differential geometric properties, proposed one kind of iso-scallop path search algorithm. Finally, using the above algorithm developed an application of trajectory planning for free-form surface and generated tool paths for such surface. The trajectories generated verified the algorithm is practicable.

The Impeller Five-Axis NC Machining Simulation Based on UG NX 7.5

2011 ◽  
Vol 188 ◽  
pp. 689-692
Author(s):  
J.C. Huang ◽  
Xian Li Liu ◽  
D.K. Jia ◽  
W.D. Li ◽  
K. Guo
Keyword(s):  
Tool Path ◽  
Tool Path Generation ◽  
Path Generation ◽  
Machining Simulation ◽  
Processing Efficiency ◽  
Simulation Based ◽  
Processing Module ◽  
Nc Machining Simulation ◽  
Object Of Study ◽  
Five Axis

To improve the processing efficiency and Surface qualityof impeller. Impeller processing difficulties as a major object of study were researched by this paper. Using UG7.5 impeller processing module, Based on the impeller feature division idea and to optimize the impeller machining path.Finally, Through it carried out the tool path generation and simulation and verify the feasibility of processing. To effectively enhance programming efficiency and processing quality.

Geometric Modeling for Five-Axis CNC Machining of Mold Surface with Flat-End Tool

2010 ◽  
Vol 135 ◽  
pp. 41-45
Author(s):  
Wei Qiang Gao ◽  
Bo Xie ◽  
Zou Ya Huang ◽  
Chao Ting Qing
Keyword(s):  
Differential Geometry ◽  
Geometric Modeling ◽  
Tool Path ◽  
Geometric Model ◽  
Cnc Machining ◽  
Mold Surface ◽  
Frenet Frame ◽  
Machined Surface ◽  
Conjugate Space ◽  
Five Axis

This paper taken the flat-end tool and machined surface as a pair of mutually conjugate space contact tooth envelope surface and used the Frenet frame of differential geometry to describe the NC machining tool path in five-axis CNC machining of mold surface with flat-end tool. Thus the geometric model in five-axis CNC machining of mold surface with flat-end tool was established.

scholarly journals Modeling of cutting forces in five-axis milling of sculptured surfaces directly from a CAM tool path

2021 ◽  
Author(s):  
Yacine Hamiche ◽  
Nasreddine Zeroudi ◽  
Rabah Lamara
Keyword(s):  
Analytical Methods ◽  
Cutting Forces ◽  
Tool Path ◽  
Information Source ◽  
Milling Process ◽  
Computer Assisted ◽  
Practical Case ◽  
Sculptured Surfaces ◽  
Machined Surface ◽  
Five Axis

Abstract The present work is motivated by the fact that for predicting cutting forces, which arise under various cutting conditions, workpiece-tool pairs and machining depths, the numerical methods are slower and less efficient than the analytical methods. In addition, recent developments in Computer Assisted Machining (CAM) techniques have enabled analytical methods to be applied even with a complex workpiece geometry. The present paper presents a practical and powerful analytical method which is based on the use of the toolpath file as the main information source for the machined surface. This method takes into account tool position and orientation in a five-axis milling process with tool ball-end modeled as a sphere called bull-nose. Also assumptions are made to get a good approximation in the calculation of global and local cutting forces, in the aim of developing an analytical model able to predict the cutting forces for five-axis milling process, easy to apply for any practical case.

Tool Inclination Angle Change Rate Control in Five-Axis Flat-End Milling

2012 ◽  
Vol 488-489 ◽  
pp. 819-825
Author(s):  
Gandjar Kiswanto ◽  
Vinsensius Ricko ◽  
S. Suntoro
Keyword(s):  
Inclination Angle ◽  
Tool Path ◽  
End Milling ◽  
Machined Surface ◽  
Good Surface ◽  
Angle Change ◽  
Wide Range ◽  
The One ◽  
Good Surface Roughness ◽  
Five Axis

Five-axis milling is used in the machining of complex shaped surfaces in a wide range of industries. In five-axis milling, one can adjust inclination angle to adapt such machining condition, e.g. to give high material removal and/or to avoid gouging. Choosing an appropriate inclination angle is difficult especially for complex parts with varying surface curvature. On the one hand, a small inclination angle is recommended to have good surface roughness and small scallop height. On the other hand, some regions may need much larger minimum inclination angle compared to the others to avoid gouging. The trade off for this is to have, in practice, a varying minimum (which is considered to be optimal) inclination angle along the tool path, so that while machining, the tool is dynamically adapted to be as close as possible to the surface without gouging. However, applying inclination angle change over some distances influences the quality of machined surface. This paper presented a method to control such inclination angle change to improve part accuracy. Some experimental were conducted to see the results and compared with the one when inclination angle change is not controled. The propose method effectively reduces the surface deviation thus improve part accuracy. More details about this study are presented in the paper.

Research on Five-Axis Dual-NURBS Adaptive Interpolation Algorithm for Flank Milling

2010 ◽  
Vol 443 ◽  
pp. 330-335 ◽  
Author(s):  
Yu Han Wang ◽  
Jing Chun Feng ◽  
Sun Chao ◽  
Ming Chen
Keyword(s):  
Tool Path ◽  
Flank Milling ◽  
Interpolation Algorithm ◽  
Machining Time ◽  
Surface Machining ◽  
Tool Axis ◽  
Scanning Area ◽  
Nurbs Interpolation ◽  
Milling Method ◽  
Five Axis

In order to exploit the advantages of five-axis flank milling method for space free surface machining to the full, a definition of non-equidistant dual-NURBS tool path is presented first. On this basis, the constraint of velocity of points on the tool axis and the constraint of scanning area of the tool axis are deduced. Considering both of these constraints, an adaptive feed five-axis dual-NURBS interpolation algorithm is proposed. The simulation results show that the feedrate with the proposed algorithm satisfies both of the constraints and the machining time is reduced by 38.3% in comparison with the constant feed interpolator algorithm.

Collision-Free Tool Path Generation for Five-Axis High Speed Machining

2011 ◽  
Vol 474-476 ◽  
pp. 961-966 ◽  
Author(s):  
Li Qiang Zhang ◽  
Min Yue
Keyword(s):  
Image Analysis ◽  
Collision Detection ◽  
High Speed ◽  
Tool Path ◽  
Geometric Model ◽  
High Speed Machining ◽  
Analysis Method ◽  
Geometric Information ◽  
Detection Approach ◽  
Five Axis

Collision detection is a critical problem in five-axis high speed machining. Using a combination of process simulation and collision detection based on image analysis, a rapid detection approach is developed. The geometric model provides the cut geometry for the collision detection and records a dynamic geometric information for in-process workpiece. For the precise collision detection, a strategy of image analysis method is developed in order to make the approach efficient and maintian a high detection precision. An example of five-axis machining propeller is studied to demonstrate the proposed approach. It has shown that the collision detection task can be achieved with a near real-time performance.

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