How to Eliminate Machining Marks on the Surface of Impeller Blades by CimatronE CAM

2014 ◽  
Vol 628 ◽  
pp. 205-208
Author(s):  
Gui Jie Fan
Keyword(s):  
Comparative Analysis ◽  
Three Dimensional ◽  
Numerical Control ◽  
Surface Structures ◽  
Curved Surface ◽  
Finish Machining ◽  
Cad Cam ◽  
Machining Strategies ◽  
Cam Software ◽  
Control Tool

The impeller blades are hard to machine for its complex and curved surface structures. It is almost impossible to manufacture the blades by manual programming on Numerical Control Tool. Now, the program almost is completed by the three-dimensional CAD/ CAM software, such as UG, Pro/Engineer, CimatronE which have a lot of machining strategies suitable for a wide variety of parts. However, the result is not perfect if you choose improper strategies. Even more, machining marks will be left on the parts’ surface. This paper takes the impeller for an example and gives the solutions for eliminating machining marks left on the impeller blades’ surface through a comparative analysis on the 3-axis finish machining strategies in CimatronE.

Numerical Control Machining of Scroll with Variable Thickness

2014 ◽  
Vol 490-491 ◽  
pp. 288-293
Author(s):  
Tao Liu ◽  
Xia Qin Wang ◽  
Jun Wu ◽  
Yong Wei Wang
Keyword(s):  
Variable Thickness ◽  
Processing Method ◽  
Numerical Control ◽  
Scroll Compressor ◽  
Numerical Control Machining ◽  
Cad Cam ◽  
Programming Process ◽  
Center Track ◽  
Fitting Error ◽  
Cam Software

With the development of scroll technology, the requirements of more efficient and more accurate processing method for scroll compressor parts become more urgent. This paper proposes a method to improve the machining effect of scroll compressor. The approach is based on 3-point arc approximation method which divides combined profile of scroll wrap into subparagraph arcs that can be interpolated on CNC System. This approach simplifies the programming process and improves the curve fitting effect. The results indicate that the fitting error is in the predetermined range, and the interpolation points of cutter center track are significantly less than those based on CAD/CAM software. The method presented in this paper is of significance to the NC machining of novel precise scroll profile.

A New Approach to Determining Optimum Tool Size for Finish Milling of NURBS Profiles

2006 ◽  
Author(s):  
Hongda Zhang ◽  
Zezhong C. Chen
Keyword(s):  
Manufacturing Industry ◽  
Cutting Tool ◽  
Software Systems ◽  
New Approach ◽  
Mechanical Parts ◽  
Finish Machining ◽  
Cad Cam ◽  
Complicated Geometries ◽  
Global And Local ◽  
Cam Software

A curve model of non-uniform rational B-spline (NURBS) has been widely adopted in mainstream CAD/CAM software systems to design complicated geometries of mechanical parts, for example, the curved profiles of pockets, sides, and islands. To accurately produce these geometries in finish milling, the size of the cutting tool should be optimized in order to attain high machining efficiency. Although this has been a research focus for a decade, optimal tool size determination still remains as a technical challenge. This work proposes a new approach to addressing this challenge so that the cutting tool of the largest allowable size is selected for finish machining without global and local gouge on the part. In this approach, a global optimization problem is formulated for the optimum tool size, and particle swarm optimization (PSO) method is employed to solve this problem. As a result, this approach can efficiently optimize the tool size for finish machining of the NURBS profiles; on the other hand, it can be more accurately and efficiently to detect global and local gouge on the profiles. Since it is easy to implement, this approach can be directly used in the manufacturing industry.

Numerical Control of Surrounding and Columniform Cam

2014 ◽  
Vol 926-930 ◽  
pp. 1383-1386
Author(s):  
Ying Wang ◽  
Yang Yang Xu
Keyword(s):  
Three Dimensional ◽  
Numerical Control ◽  
Basic Method ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Cam Software

It describes basic method of columniform on process and basic method of three-dimensional modeling and cam by the compositive use of PRO/E software and Master CAM software.

Research on the Processing Simulation of Whorl Milling Based on LISP

2014 ◽  
Vol 998-999 ◽  
pp. 466-469
Author(s):  
Ying Zhang ◽  
Xin Shi
Keyword(s):  
Real Time ◽  
Three Dimensional ◽  
Simulation Software ◽  
Numerical Control ◽  
Disc Cutter ◽  
Boolean Operation ◽  
Milling Simulation ◽  
Cad Cam ◽  
Time Observation ◽  
Real Time Observation

According to the development requirements of CAD/CAM numerical control processing simulation software, now take the simulation of milling whorl processing as an example. Based on AutoCAD application platform, and the theory of whorl milling processing, LISP is used for programming, and the simplified ball three-dimensional entity model of the disc cutter is shown. Through object boolean operation, the milling simulation program is called, finally realizing the dynamic 3D simulation of whorl milling processing, providing technical support for the real-time observation of numerical control milling.

scholarly journals Maxillary Ridge Augmentation with Custom-Made CAD/CAM Scaffolds. A 1-Year Prospective Study on 10 Patients

2014 ◽  
Vol 40 (5) ◽  
pp. 561-569 ◽  
Author(s):  
Francesco Mangano ◽  
Aldo Macchi ◽  
Jamil Awad Shibli ◽  
Giuseppe Luongo ◽  
Giovanna Iezzi ◽  
...  
Keyword(s):  
3D Reconstruction ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Numerical Control ◽  
Porous Hydroxyapatite ◽  
Ridge Augmentation ◽  
Custom Made ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

Several procedures have been proposed to achieve maxillary ridge augmentation. These require bone replacement materials to be manually cut, shaped, and formed at the time of implantation, resulting in an expensive and time-consuming process. In the present study, we describe a technique for the design and fabrication of custom-made scaffolds for maxillary ridge augmentation, using three-dimensional computerized tomography (3D CT) and computer-aided design/computer-aided manufacturing (CAD/CAM). CT images of the atrophic maxillary ridge of 10 patients were acquired and modified into 3D reconstruction models. These models were transferred as stereolithographic files to a CAD program, where a virtual 3D reconstruction of the alveolar ridge was generated, producing anatomically shaped, custom-made scaffolds. CAM software generated a set of tool-paths for manufacture by a computer-numerical-control milling machine into the exact shape of the reconstruction, starting from porous hydroxyapatite blocks. The custom-made scaffolds were of satisfactory size, shape, and appearance; they matched the defect area, suited the surgeon's requirements, and were easily implanted during surgery. This helped reduce the time for surgery and contributed to the good healing of the defects.

Square Head Adjustable Die Device Research on Ship 3D CNC Forming Machine

2013 ◽  
Vol 395-396 ◽  
pp. 920-924
Author(s):  
Shao Juan Su ◽  
Yong Hu ◽  
Cheng Fang Wang ◽  
Bo Liu
Keyword(s):  
Three Dimensional ◽  
Numerical Control ◽  
Curved Surface ◽  
Effective Control ◽  
Forming Process ◽  
Device Structure ◽  
Cold Bending ◽  
Ship Hull Plate ◽  
Difficult Part ◽  
Heating Technology

Research device structure upon suppressing impress and wrinkling about three-dimensional numerical control bending machine.3D ship curved-surface outside plate automatic forming process is always the difficult part in the field of domestic and international shipbuilding. Analyzing the problems in existing processing methods ,for example, line heating technology has the defects of poor production conditions, large labor intensity, not environmental friendly and cold bending forming method may result in indentation, wrinkling or rebound phenomenon.Presents the forming process of a ship hull plate based on square head adjustable die curved surface forming device. By setting the non pressure and a plurality of planar head to replace the traditional integral die method, the paper will illustrate the composition and working principles of the process at the same time try to implement effective control of indentation and wrinkle phenomenon followed by verification through experiments.

Virtual Processing Research on Auto Control Valve Cylinder Mold

2011 ◽  
Vol 201-203 ◽  
pp. 180-184
Author(s):  
Ping Xu ◽  
Kun Peng Ma ◽  
Shao Feng Wang
Keyword(s):  
Machine Tool ◽  
Virtual Machine ◽  
Control Valve ◽  
Simulation Software ◽  
Numerical Control ◽  
Control Machine Tool ◽  
Control Programs ◽  
Virtual Machine Technology ◽  
Cad Cam ◽  
Cam Software

Especially from the perspective of geometric simulation, through the combination of CAD/CAM software Pro/e with professional numerical control machine tool simulation software Vericut, achieve the virtual processing of cylinder mold. Numerical control programs will be transferred to the virtual machine tool, producing products meet the requirements. Proving the combination of Pro/e and Vericut for the research of virtual machine technology is a possible method.

Application of Reverse Engineering for Redesigning and Manufacturing of a Printer Spare Part

2013 ◽  
Vol 690-693 ◽  
pp. 2708-2712 ◽  
Author(s):  
Ivan Buranský ◽  
Ladislav Morovič ◽  
Jozef Peterka
Keyword(s):  
Reverse Engineering ◽  
Three Dimensional ◽  
Spare Part ◽  
Numerical Control ◽  
Cnc Machine Tools ◽  
Cnc Milling ◽  
Cnc Machine ◽  
Computer Aided ◽  
3D Digitization ◽  
Cam Software

The paper deals with the application of Reverse Engineering (RE) in the process of redesigning and manufacturing of a printer spare part. The paper presents the devices for transfer of a damaged printer part into a digital model by non-contact three-dimensional (3D) digitization. The paper discusses the 3D computer-aided designing (CAD) of a model with CAD software based on a digitized real part. The paper presents two proposals for spare part manufacturing: a) manufacturing by computer numerical control (CNC) milling, which is projected and programmed in computer-aided manufacturing (CAM) software with regard to production potential of selected CNC machine tools; b) manufacturing by Rapid Prototyping (RP) technology. The article concludes with a comparison of the proposed methods of manufacturing of printer spare part in term of production time.

Scanning and Transmission Microscopy of Nematocyst Batteries in Epitheliomuscular Cells of Hydra

1971 ◽  
Vol 29 ◽  
pp. 410-411 ◽  
Author(s):  
Jane A. Westfall ◽  
S. Yamataka ◽  
Paul D. Enos
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Osmium Tetroxide ◽  
External Surface ◽  
Three Dimensional ◽  
Surface Structures ◽  
Transmission Microscopy ◽  
Transmission Electron ◽  
Freeze Dried ◽  
Scanning Electron

Scanning electron microscopy (SEM) provides three dimensional details of external surface structures and supplements ultrastructural information provided by transmission electron microscopy (TEM). Animals composed of watery jellylike tissues such as hydras and other coelenterates have not been considered suitable for SEM studies because of the difficulty in preserving such organisms in a normal state. This study demonstrates 1) the successful use of SEM on such tissue, and 2) the unique arrangement of batteries of nematocysts within large epitheliomuscular cells on tentacles of Hydra littoralis.Whole specimens of Hydra were prepared for SEM (Figs. 1 and 2) by the fix, freeze-dry, coat technique of Small and Màrszalek. The specimens were fixed in osmium tetroxide and mercuric chloride, freeze-dried in vacuo on a prechilled 1 Kg brass block, and coated with gold-palladium. Tissues for TEM (Figs. 3 and 4) were fixed in glutaraldehyde followed by osmium tetroxide. Scanning micrographs were taken on a Cambridge Stereoscan Mark II A microscope at 10 KV and transmission micrographs were taken on an RCA EMU 3G microscope (Fig. 3) or on a Hitachi HU 11B microscope (Fig. 4).

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