A New Method for Determination of Wheel Location in Machining Helical Flute of End Mill

2016 ◽  
Vol 138 (11) ◽  
Author(s):  
Van-Hien Nguyen ◽  
Sung-Lim Ko
Keyword(s):  
Computer Aided Design ◽  
Search Algorithm ◽  
Rake Angle ◽  
Design Parameters ◽  
End Mill ◽  
Axis Orientation ◽  
Computer Aided ◽  
End Mills ◽  
Helical Flute ◽  
Setting Parameters

This paper presents a mathematical model to find the wheel location in grinding a given helical flute of an end mill. Two new setting parameters are introduced to define the relative wheel location in workpiece coordinates. This model allows the wheel-axis orientation be expressed explicitly as a function of the design factors and machine setting parameters. By utilizing this explicit form of the wheel orientation and analyzing the influence of setting parameters on design parameters, a new efficient search algorithm is proposed, and the performance shows that the required wheel location is found within 1.5 s to machine a given flute profile. Moreover, the rake angle can be produced more precisely compared with the conventional methods, which have been used with approximations. A comprehensive development of the software for designing and grinding the helical flute of the end mill is presented, which provides a technology and good foundation for the development of a computer-aided design and computer-aided manufacturing (CAD/CAM) system for manufacturing end mills. The results of the experiment, simulation, and design are compared in order to verify of the proposed method.

An Automated and Accurate CNC Programming Approach to Five-Axis Flute Grinding of Cylindrical End-Mills Using the Direct Method

2013 ◽  
Vol 135 (1) ◽  
Author(s):  
Mahmoud M. Rababah ◽  
Zezhong C. Chen
Keyword(s):  
Direct Method ◽  
Rake Angle ◽  
Programming Approach ◽  
Rake Face ◽  
Core Radius ◽  
End Mill ◽  
The Core ◽  
Computer Aided ◽  
Cnc Programming ◽  
End Mills

In solid carbide end-mills, the flutes significantly affect the tool's cutting performance and life, and the core radius mainly affects the tool's rigidity. The current CNC programming techniques can correctly determine the orientation of the wheel so that it grinds the rake face with the specified rake angle; however, it cannot accurately determine the wheel location for the direct method and, consequently, the desired core radius is not guaranteed. To address this problem, a new CNC programming approach is proposed to accurately calculate the wheel orientation and location (WOL) in 5-axis grinding of the cylindrical end-mill flutes. In this work, a new concept of 5-axis CNC grinding—effective grinding edge (EGE)—is first proposed to represent the instantaneous grinding edge of the wheel, and the parametric equations of the effective grinding edge are formulated. The wheel orientation and location in 5-axis flute grinding are calculated automatically and accurately so that the rake angle of the rake face and the core radius are ensured. The new approach is verified with several examples in this work. Therefore, it can improve the end-mill quality and lays a good foundation for the computer-aided design/computer-aided engineering/computer-aided manufacturing (CAD/CAE/CAM) of end-mills.

Computer Aided Automotive Interior Design for Kansei Engineering

2011 ◽  
Vol 130-134 ◽  
pp. 504-507 ◽  
Author(s):  
Li Hong Zhu ◽  
Han Zhao ◽  
Xiao Chen Yin ◽  
Li Jun Zhu ◽  
Liang Zhang
Keyword(s):  
Interior Design ◽  
Automotive Industry ◽  
Computer Aided Design ◽  
Design Parameters ◽  
Kansei Engineering ◽  
Computer Aided ◽  
Quantitative Analysis Method ◽  
Aided Design ◽  
Industry Trends ◽  
Automotive Interior

Nowadays, the development of automotive industry trends more personalized and profuse product alternatives. Kansei Engineering has been applied to interior design for customer satisfaction based on ergonomic technology in the paper. The computer aided design automotive interior system includes two subsystems: one is Computer-aided Sensation Survey Subsystem and the other is Computer-aided Automobile Interior Design Subsystem. Mathematical statistics and quantitative analysis method are adopted to establish quantified relationship between product perceptual image and design parameters.

An Analysis of Drill Geometry for Optimum Drill Design by Computer. Part II—Computer-Aided Design

1970 ◽  
Vol 92 (3) ◽  
pp. 657-666 ◽  
Author(s):  
S. Fujii ◽  
M. F. DeVries ◽  
S. M. Wu
Keyword(s):  
Computer Program ◽  
Computer Aided Design ◽  
Cutting Planes ◽  
Orthogonal Cutting ◽  
Design Parameters ◽  
Twist Drill ◽  
Grinding Parameters ◽  
Computer Aided ◽  
Aided Design ◽  
Drill Design

In Part II, a computer program that aids in the design of a twist drill is described, based on the analysis presented in Part I. A true drill and a “computer-designed” drill having identical design and grinding parameters are compared in orthogonal cutting planes. The effects of the design parameters on drill geometry are investigated utilizing the computer program.

A Generalized and Efficient Approach for Accurate Five-Axis Flute Grinding of Cylindrical End-Mills

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Lei Ren ◽  
Shilong Wang ◽  
Lili Yi
Keyword(s):  
Singular Points ◽  
Grinding Process ◽  
Core Radius ◽  
End Mill ◽  
New Approach ◽  
Original Algorithm ◽  
Efficient Approach ◽  
Computer Aided ◽  
End Mills ◽  
Five Axis

Wheel position (including wheel location and orientation) in the flute grinding process of an end-mill determines the ground flute's geometric parameters, i.e., rake angle, core radius, and flute width. Current technologies for calculating the wheel position to guarantee the three parameters' accuracy are either time-consuming or only applicable to the grinding wheels with singular points. In order to cope with this problem, this paper presents a generalized and efficient approach for determining the wheel position accurately in five-axis flute grinding of cylindrical end-mills. A new analytic expression of the wheel location is derived and an original algorithm is developed to search for the required wheel position. This approach can apply not only to the wheels with fillets but also to the wheels with singular points. Simulation examples are provided to validate the new approach and compared with the results from other literature. Besides the ability to determine the wheel position, the new approach can evaluate extrema of the core radius and flute width that a specified wheel can generate. Owing to the evaluated extrema, automatic 1V1 wheel customization according to the designed flute is realized in this paper. This work can improve the efficiency and automation degree of the flute grinding process and lay a good foundation for the development of a comprehensive computer-aided design and computer-aided manufacturing system for end-mill manufacturing.

Computer-Aided Tissue Engineering in Whole Bone Replacement Treatment

2005 ◽  
Author(s):  
M. Wettergreen ◽  
B. Bucklen ◽  
W. Sun ◽  
M. A. K. Liebschner
Keyword(s):  
Tissue Engineering ◽  
Vertebral Body ◽  
Computer Aided Design ◽  
Building Blocks ◽  
The Body ◽  
Artificial Substrates ◽  
Design Parameters ◽  
Patient Specific ◽  
Cellular Interactions ◽  
Computer Aided

Tissue engineering is developing into a less speculative field involving the careful interplay of numerous design parameters and multi-disciplinary professionals. Problem solving abilities and state of the art research tools are required to develop solutions for a wide variety of clinical issues. One area of particular interest is orthopaedic biomechanics, a field that is responsible for the treatment of over 700,000 vertebral fractures in the U.S alone last year. Engineers are currently lacking the technology and knowledge required to govern the subsistence of cells in vivo, let alone the knowledge to create a functional tissue replacement for a whole organ. Despite this, advances in Computer Aided Tissue Engineering (CATE) are continually growing. Using a combinatory approach to scaffold design, patient-specific implants may be constructed. Computer aided design (CAD), optimization of geometry using voxel finite element models or other optimization routines, creation of a library of architectures with specific material properties, rapid prototyping, and determination of a defect site using imaging modalities highlight the current availability of design resources. Our study represents a patient specific approach for constructing a complete vertebral body via building blocks. Though some of the methods described cannot be realized with current technology, namely complete construction of the vertebral body via FDM, the necessary advances are not far off. Computing power and CAD programs need to improve slightly to allow the rapid generation of complex models that would ease the fabrication of an appropriate number of building blocks. The main bottleneck of the process described in this study is the general lack of knowledge of human mechanobiology and the role of cellular interactions on artificial substrates including immune responses, and foreign body reactions. Assuming these biological parameters can be identified, a scaffold may be designed with a proper pore size and interconnectivity, microstructure, degradation rate, and surface chemistry. The advantage of the outlined process lies in adjustment of the vertebral compliance first, to ensure adequate load transfer, an important property for vertebral replacement. Subsequently, net biological properties can be fine tuned by simply scaling the final construct. Mixing and matching of geometries may be utilized to design asymmetric scaffolds, or scaffolds that exhibit a discontinuous microstructural stiffness with the goal of accentuating fluid flow. Finally, while these techniques lend themselves to the formulation of bone constructs, they can be used for other parts of the body as well that do not require load-bearing support.

Optimization of tool design parameters for thread tapping process of Ti-6Al-4V

2020 ◽  
pp. 095440892097499
Author(s):  
Ahmet Dogrusadik ◽  
Candas Aycicek ◽  
Aykut Kentli
Keyword(s):  
Elastic Modulus ◽  
Titanium Alloys ◽  
Rake Angle ◽  
Tool Design ◽  
Design Parameters ◽  
Machining Processes ◽  
Tool Coating ◽  
Ticn Coating ◽  
Helical Flute ◽  
Usual Process

Thread tapping is one of the most important machining processes. Although thread tapping is a usual process and has been used for decades, the process still needs improvement for promising materials such as titanium alloys to increase the performance of the process. Titanium alloys are known as difficult-to-cut materials due to their low heat conductivity and elastic modulus. The aim of the work presented in this paper is to optimize the tapping tool primary design parameters for Ti-6Al-4V. The most influential tool design parameters on the process were selected as the rake angle, helical flute angle, chamfer angle, and tool coating. Optimization of the tool design parameters was made by considering the results of the experimental work. Two levels of each parameter were chosen. Taguchi L8 orthogonal array was used as the design of experiment. Tapping tool temperature and tapping torque were determined as the process outputs. According to the results, the optimized tool design parameters were found as 6° rake angle, 12° helical flute angle, 14° chamfer angle, and TiCN coating.

scholarly journals Retention Force of Removable Partial Dentures with CAD-CAM-Fabricated Telescopic Crowns

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3228 ◽  
Author(s):  
Christin Arnold ◽  
Ramona Schweyen ◽  
Arne Boeckler ◽  
Jeremias Hey
Keyword(s):  
Computer Aided Design ◽  
Precious Metal ◽  
Artificial Aging ◽  
Clinical Decision Making ◽  
Clinical Decision ◽  
Design Parameters ◽  
Retention Force ◽  
Computer Aided ◽  
Cad Cam ◽  
Metal Group

The aim of this study was to compare the retention forces after artificial aging of telescopic crowns fabricated either by a conventional lost-wax technique or by computer-aided design/computer-aided manufacturing (CAD-CAM) technology. Two types of telescopic crowns (0°) were fabricated conventionally using high-noble (group A) and non-precious metal (group B). CAD-CAM fabricated telescopic crowns (0°) were made of non-precious metal (group C). Retention forces were assessed before and after artificial aging and after axial and non-axial loading. Initially [I.] and after artificial aging [IV.], specimens of group C (I. 16.2 N; IV. 13.6 N) exhibited the highest retention forces. The retention forces in groups B (I. 12.5 N; IV. 4.6 N) and A (I. 9.6 N; IV. 2.9 N) were found to be lower than those of group C. The retention force differences between the groups were statistically significant (p < 0.001) at all measurement times [I. vs. IV.]. Different fabricated telescopic crowns with approximately identical designs and materials exhibited different retention forces and different long-term retentive behavior. An optimized CAD-CAM process with individually defined design parameters ensured telescopic crowns with a better fit. These findings might influence prospective clinical decision-making.

Computer-Aided Design of X-Ray Microtomographic Scanners

2014 ◽  
Vol 1033-1034 ◽  
pp. 1327-1330 ◽  
Author(s):  
V.I. Syryamkin ◽  
E.N. Bogomolov ◽  
M.S. Kutsov
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Design Parameters ◽  
Optical Elements ◽  
X Ray ◽  
X Ray Imaging ◽  
Functional Scheme ◽  
Computer Aided ◽  
Neural Network System ◽  
Aided Design

The article is to study the development of computer-aided design of X-ray microtomography - the device for investigating the structure and construction three-dimensional images of organic and inorganic objects on the basis of shadow projections. This article provides basic information regarding CAD of X-ray microtomography and a scheme consisting of three levels. The article also shows basic relations of X-ray computed tomography, the generalized scheme of a X-ray microtomographic scanner. The methods of X-ray imaging of the spatial microstructure and morphometry of materials are described. The main characteristics of an X-ray microtomographic scanner, the X-ray source, X-ray optical elements and mechanical components of the positioning system are shown. The block scheme and software functional scheme for intelligent neural network system of analysis of the internal microstructure of objects are presented. The method of choice of design parameters of CADof X-raymicrotomography is aimed at improving the quality of design and reduce of costs of it. It is supposed to reduce the design time and eliminate the growing number of engineers involved in development and construction of X-ray microtomographic scanners.

Computer-Aided Design of Compact Helical Gear Sets

1989 ◽  
Vol 111 (2) ◽  
pp. 285-289 ◽  
Author(s):  
C. S. Jog ◽  
S. S. Pande
Keyword(s):  
Computer Aided Design ◽  
Design Strategy ◽  
Helix Angle ◽  
Helical Gear ◽  
Optimization Techniques ◽  
Design Parameters ◽  
Gear Design ◽  
Computer Aided ◽  
Bending Stresses ◽  
Aided Design

This paper presents the design strategy for the Computer-Aided Design (CAD) of compact helical gear sets. Using optimization techniques, fundamental gear design parameters such as the number of teeth on the pinion, helix angle, and diametral pitch (or module) are selected subject to constraints on bending stresses, contact stresses, and involute interference limits for both standard and nonstandard gearing. The CAD procedure is illustrated with the help of a design example.

Design of a CAM System for End Mills Based on Solid Modeling

2011 ◽  
Vol 201-203 ◽  
pp. 841-845
Author(s):  
Zhan Hua You ◽  
Fei Tang ◽  
Shu Zhe Li ◽  
Xiao Feng Yue ◽  
Xiao Hao Wang
Keyword(s):  
Solid Modeling ◽  
Numerical Control ◽  
Design Parameters ◽  
End Mill ◽  
Nc Code ◽  
Inner Radius ◽  
End Mills ◽  
Grinding Machine ◽  
Five Axis ◽  
Mill Machining

To facilitate the manufacturing of an end mill, this paper presents a manufacturing model of a flat-end mill using a five-axis computer numerical control (CNC) grinding machine. Using input data of end mill geometry, wheels geometry, wheel setting and machine setting, the NC code for machining will be generated directly from a solid modeling then used as input to simulate the end mill machining in 3 Dimension before machining. The 3D simulation system of the end mill grinding is generated by VBA and AutoCAD2008. Machining simulation consists of a sequence of Boolean operations on difference between the tool and the grinding wheels through NC code. Then the major design parameters of a cutter, such as relief angle and inner radius, can be verified by interrogating the section profile of its solid model. The manufacturing model presented in this paper provides a practical and efficient method for developing CAM software for the manufacture of an end mill.

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