Computer Aided Manufacturing of Marine Propellers by Parallel Kinematics Machine

Materials ◽  
2003 ◽  
Author(s):  
Hui Chen ◽  
Zhixing Wang
Keyword(s):  
Tool Path ◽  
Parallel Kinematics ◽  
Dimensional Model ◽  
Computer Aided Manufacturing ◽  
3 Dimensional ◽  
Marine Propellers ◽  
Tool Paths ◽  
Nc Program ◽  
Computer Aided ◽  
Cad Cam

Techniques of manufacturing integral marine propellers by Parallel Kinematics Machine (PKM) are discussed in this paper, and complete CAD/CAM steps for manufacturing propellers using UG CAD/CAM system are presented. The designed propeller model is defined by a series of aerofoil sections data, so UG/CAD module are used to create the 3-dimensional model of propeller, and tool paths are generated in UG/CAM module. Vericut is adopted to simulate the tool paths generated by UG/CAM and to check interferences. NC postprocessor for PKM is developed on the basis of UG/Post. It is invoked in UG/CAM and converts tool path data into NC program to drive PKM. Finally, machining experiments based on all the techniques discussed in this paper are made. Not only does it puts forward a new scheme and machine to manufacture marine propellers, but also can push the industrialization and practicality of PKM.

Virtual facial simulation of prosthetic outcome for static computer-aided implant surgery and CAD-CAM prostheses

2021 ◽  
Author(s):  
Bryan T Harris ◽  
Chao-Chieh Yang ◽  
Dean Morton ◽  
Wei-Shao Lin
Keyword(s):  
Computer Aided Design ◽  
Virtual Patient ◽  
Clinical Report ◽  
Computer Aided Manufacturing ◽  
Implant Surgery ◽  
3 Dimensional ◽  
Computer Aided ◽  
Cad Cam ◽  
Pre Treatment ◽  
Aided Design

This clinical report describes a digital process of using a 3-dimensional (3D) virtual patient at an exaggerated smile view for the pre-treatment simulation of the prosthetic outcome. In addition, the virtual patient can be used to assist with the formulation of a prosthetically - driven surgical plan for static computer-aided implant surgery (s-CAIS) and the design of the computer-aided design and computer-aided manufacturing (CAD-CAM) prostheses.

Morphological Offset Computing for Contour Pocketing

2006 ◽  
Vol 129 (2) ◽  
pp. 400-406 ◽  
Author(s):  
R. Molina-Carmona ◽  
A. Jimeno ◽  
R. Rizo-Aldeguer
Keyword(s):  
Computer Aided Design ◽  
Tool Path ◽  
Free Form ◽  
Computer Aided Manufacturing ◽  
Theoretical Formulation ◽  
Topological System ◽  
Computer Aided ◽  
Cad Cam ◽  
Tool Shape ◽  
Aided Design

Background. Tool path generation problem is one of the most complexes in computer aided manufacturing. Although some efficient algorithms have been developed to solve it, their technological dependency makes them efficient in only a limited number of cases. Method of Approach. Our aim is to propose a model that will set apart the geometrical issues involved in the manufacturing process from the purely technology-dependent physical issues by means of a topological system. This system applies methods and concepts used in mathematical morphology paradigms. Thus, we will obtain a geometrical abstraction which will not only provide solutions to typically complex problems but also the possibility of applying these solutions to any machining environment regardless of the technology. Presented in the paper is a method for offsetting any kind of curve. Specifically, we use parametric cubic curves, which is one of the most general and popular models in computer aided design (CAD)/computer aided manufacturing (CAM) applications. Results. The resulting method avoids any constraint in object or tool shape and obtains valid and optimal trajectories, with a low temporal cost of O(n∙m), which is corroborated by the experiments. It also avoids some precision errors that are present in the most popular commercial CAD/CAM libraries. Conclusions. The use of morphology as the base of the formulation avoids self-intersections and discontinuities and allows the system to machine free-form shapes using any tool without constraints. Most numerical and geometrical problems are also avoided. Obtaining a practical algorithm from the theoretical formulation is straightforward. The resulting procedure is simple and efficient.

scholarly journals Computer-aided design/computer-aided manufacturing skull base drill

2017 ◽  
Vol 42 (5) ◽  
pp. E6 ◽  
Author(s):  
William T. Couldwell ◽  
Joel D. MacDonald ◽  
Charles L. Thomas ◽  
Bradley C. Hansen ◽  
Aniruddha Lapalikar ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Tool Path ◽  
Cutting Tool ◽  
Computer Aided Manufacturing ◽  
Machining Time ◽  
Computer Aided ◽  
Cad Cam ◽  
Machining System ◽  
Rapid Removal ◽  
Aided Design

The authors have developed a simple device for computer-aided design/computer-aided manufacturing (CAD-CAM) that uses an image-guided system to define a cutting tool path that is shared with a surgical machining system for drilling bone. Information from 2D images (obtained via CT and MRI) is transmitted to a processor that produces a 3D image. The processor generates code defining an optimized cutting tool path, which is sent to a surgical machining system that can drill the desired portion of bone. This tool has applications for bone removal in both cranial and spine neurosurgical approaches. Such applications have the potential to reduce surgical time and associated complications such as infection or blood loss. The device enables rapid removal of bone within 1 mm of vital structures. The validity of such a machining tool is exemplified in the rapid (< 3 minutes machining time) and accurate removal of bone for transtemporal (for example, translabyrinthine) approaches.

A Dedicated CAD/CAM System for 5-Axis Machining of Marine Propeller

2001 ◽  
Author(s):  
Jae-Woong Youn ◽  
Yongtae Jun ◽  
Sehyung Park
Keyword(s):  
Lead Time ◽  
Tool Path ◽  
General Purpose ◽  
Tool Path Generation ◽  
Path Generation ◽  
Marine Propeller ◽  
Marine Propellers ◽  
Tool Paths ◽  
System Validation ◽  
Cad Cam

Abstract The manufacture of a marine propeller typically requires long lead-time to generate 5-axis tool paths. It usually takes several days to manufacture a satisfactory propeller with a general purpose CAD/CAM system. This paper proposes a novel methodology for tool path generation of 5-axis machining of marine propellers. Using the geometric characteristics of propellers, the system first computes check vectors and then generates interference-free tool paths. An iterative NURBS modeling technique is used to improve the accuracy of the models and to increase the productivity. The system has been implemented with C++ and OpenGL graphic library on the Windows system. The system validation and sample results are also given and discussed.

User’s Perspective of CAD/CAM Software

1988 ◽  
Vol 4 (04) ◽  
pp. 280-285
Author(s):  
R. V. Shields
Keyword(s):  
Significant Role ◽  
Computer Aided Design ◽  
Great Emphasis ◽  
End User ◽  
Computer Aided Manufacturing ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
Cam Software

Great emphasis has been attached to the achievement of productivity and producibility benefits through the application of computer-aided design and computer-aided manufacturing (CAD/CAM) technologies. To ensure the achievement of these benefits, it is important that the end user have appropriate software and be able to use it to his advantage. The proper procurement, customization, installation, training, and implementation of software can play a significant role in the effectiveness of CAD/CAM.

scholarly journals Awareness Among Dental Undergraduate Students Regarding CAD/CAM Technology—A Survey Report

2019 ◽  
Vol 09 (02) ◽  
pp. 57-63
Author(s):  
Sushmita V. Palanisamy ◽  
Chethan Hegde
Keyword(s):  
Undergraduate Students ◽  
Computer Aided Design ◽  
Sample Selection ◽  
Computer Aided Manufacturing ◽  
The Third ◽  
Survey Report ◽  
Computer Aided ◽  
Cad Cam ◽  
Materials Used ◽  
Aided Design

Abstract Background Contemporary dentistry is advancing toward computer-aided design/ computer-aided manufacturing (CAD/CAM) technology. But the budding dentists are unaware about the advancement. This survey aims at detecting the level of awareness among the undergraduate students and then correlating those results to modify the future curriculum. Objective The study aims (1) to assess the awareness among the dental undergraduate students and (2) to correlate the level of awareness among the third years, final years, and interns. Sample Selection Study sample consist of 300 students (third year students, final year students, and interns) of A. B. Shetty Memorial Institute of Dental Sciences, Mangalore, Karnataka, India. The information of the survey was collected with the help of a questionnaire. Results More than 70% of the students were aware about the basic functioning of CAD/CAM unit and approximately 74% of the students were unaware about the materials used to fabricate the prosthesis using CAD/CAM technology.

A Method of Machining Region Planning for Tyre Tread Mold Machining

2011 ◽  
Vol 201-203 ◽  
pp. 40-43
Author(s):  
Jian Sheng Liu ◽  
Hai Ning Tu ◽  
Fang Chen Xia ◽  
Jun Xing Xiong
Keyword(s):  
Path Planning ◽  
Tool Path ◽  
Tool Path Planning ◽  
Recognition Method ◽  
Outer Contour ◽  
Computer Aided Manufacturing ◽  
The Core ◽  
Core Technology ◽  
Computer Aided ◽  
Definition Of

To satisfy the manufacturing requirement of tyre tread pattern mold, the problem of machining region planning in the computer aided manufacturing of tyre mold is introduced. And it is analyzed that the core technology is the definition of inner and outer contours for machining region planning and tool-path planning. According to the defect of traditional constructed way of machining region, an auto recognition method of inner and outer contour is studied based on the inclusive test method.The detail step of the method is illustrated.Thinking about the special condition of the method, corresponding strategy is given. This method is applied in the computer aided manufactuing of tyre tread mold, by which machining region planning can be solved effectively.

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