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Journal articles on the topic 'NC program'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

BUT, Adrian. "OPTIMIZATION OF THE NC PROGRAM USING NC BRAIN SOFTWARE." International Conference on Applied Mechanics and Mechanical Engineering 18, no. 18 (April 1, 2018): 1. http://dx.doi.org/10.21608/amme.2018.35002.

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2

Davis, Mary V., Christine A. Bevc, and Anna P. Schenck. "Effects of Performance Improvement Programs on Preparedness Capacities." Public Health Reports 129, no. 6_suppl4 (November 2014): 19–27. http://dx.doi.org/10.1177/00333549141296s404.

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Objective. In response to public health systems and services research priorities, we examined the extent to which participation in accreditation and performance improvement programs can be expected to enhance preparedness capacities. Methods. Using data collected by the Local Health Department Preparedness Capacities Assessment Survey, we applied a series of weighted least-squares models to examine the effect of program participation on each of the eight preparedness domain scores. Participation was differentiated across four groups: North Carolina (NC) accredited local health departments (LHDs), NC non-accredited LHDs, national comparison LHDs that participated in performance or preparedness programs, and national comparison LHDs that did not participate in any program. Results. Domain scores varied among the four groups. Statistically significant positive participation effects were observed on six of eight preparedness domains for NC accreditation programs, on seven domains for national comparison group LHDs that participated in performance programs, and on four domains for NC non-accredited LHDs. Conclusions. Overall, accreditation and other performance improvement programs have a significant and positive effect on preparedness capacities. While we found no differences among accredited and non-accredited NC LHDs, this lack of significant difference in preparedness scores among NC LHDs is attributed to NC's robust statewide preparedness program, as well as a likely exposure effect among non-accredited NC LHDs to the accreditation program.

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3

Fatriyana, Maya. "CNC PROGRAM AND PROGRAMMING OF CNC MACHINE." Journal of Mechanical Science and Engineering 7, no. 1 (October 7, 2020): 019–23. http://dx.doi.org/10.36706/jmse.v7i1.37.

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A programming to make parts are CNC Programming (Computer Numerical Control Programming) for machines. An NC program consists of a sequence of instructions that control the motion and automatic sequences of an NC Machine to perform a particular processing task. In a general sense, the term NC programming refers to the creation of control data for machining workpieces on NC and CNC machines. NC programming has a decisive influence on the cost-effectiveness and profitability of NC manufacturing. The selection of a programming system is mostly guided by the need for software that is suitable for the application at hand, readily available, and as universally applicable as possible.

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4

Cai, Hui Lin, Zong Gang Li, and En En Ren. "A Scheduling Algorithms of DNC Systems Based on CAN and Program Expending Rate." Applied Mechanics and Materials 37-38 (November 2010): 46–49. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.46.

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In order to avoid communication conflicts in DNC systems, the scheduling tactics adopting a modified guaranteed EDF algorithm to DNC systems’ numerical control (NC) programs transmission was proposed. A condition was given to guarantee all NC machines in DNC systems work continuously. A mathematic model based on the actual expending rate of NC program was established to decide the priority of NC program transformation of all NC machines. A constraint condition for two machines with neighbored priority was proposed to avoid the conflict in the scheduling times. A dynamic scheduling scheme was presented for DNC systems. The validity of the presented method is verified by the practical tests.

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5

Poore, M. H., A. D. Shaeffer, and B. Blinson. "025 NC Cattle Industry Assessment Program." Journal of Animal Science 94, suppl_1 (February 1, 2016): 12–13. http://dx.doi.org/10.2527/ssasas2015-025.

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6

Liu, Ri Liang, Xian Zhi Zhang, and Cheng Rui Zhang. "Design and Implementation of a Data Processing and Visualization System for STEP-NC Programs." Applied Mechanics and Materials 16-19 (October 2009): 1015–19. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.1015.

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Over the last decade a new data interface for CAM/CNC integration has been established to replace ISO 6983. The new standard, ISO 14649 (STEP-NC), provides a comprehensive data model that describes both geometrical and technological information in an object-oriented way. In order to bridge the gap between such rich-information programs and the legacy CNC systems, this paper presents a framework for manipulating the manufacturing data in STEP-NC part programs. The proposed system provides a basic platform for STEP-NC program interpretation, geometry visualization, micro-process planning and program re-generation. Major issues relating to the realization of manufacturing information extraction and shop-floor-level process planning are addressed in particular, and a prototype for STEP-NC turning process is implemented to demonstrate the feasibility of the approach.

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7

Chen, Xiu Sheng, Cheng Rui Zhang, Qiang Wang, and Ri Liang Liu. "Study on the Simulation System Based on STEP-NC." Advanced Materials Research 129-131 (August 2010): 748–52. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.748.

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This paper presents a simulation system based on STEP-NC that can verify STEP-NC program and demonstrate the running of STEP-NC system (CNC system based on STEP-NC). NC Programs used in the STEP-NC system are in XML format. The overall architecture of the system which consists of feature extraction module, graphical modeling module, movement modeling module, feature library, simulation drive module and user interface is established. Some key technologies to implement simulation system are discussed in details. The simulation system shows great potential to the development and popularization of STEP-NC system.

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8

Bukhari, Bukhari. "Otomatisi pembangkit program nc berdasarkan gambar input autocad 2d untuk machining centre mc-520." Jurnal POLIMESIN 1, no. 1 (September 16, 2019): 10. http://dx.doi.org/10.30811/jop.v1i1.1391.

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Part program NC merupakan prosedur yang menentukan urutan proses dan posisi pahat relatif terhadap benda kerja yang harus di ikuti oleh mesin untuk membuat suatu komponen produk tertentu. Pembuatan part program NC membutuhkan seorang programmer yang mampu membaca gambar teknik dengan baik, mengenal proses permesinan, dan mampu mengubah informasi gambar tersebut secara benar. Dalam makalah ini dipresentasikan sebuah program pembaca file gambar AutoCAD yang berformat *DWG (Drawing) terlebih dahulu dirubah kedalam format *DXF (Drawing Interchange Format). Semua isi file yang di inputkan dibaca dari awal sampai akhir, yang kemudian disimpan dalam sebuah buffer data. Pada tahap selanjutnya buffer data tersebut akan diekstraksi guna pendefinisian jenis feature, origin feature, dan dimensi feature. Berdasarkan tiga informasi data tersebut maka program pembaca file gambar akan membangkitkan sebuah part program NC dalam format Bahasa manual (G-Code) untuk penerapan pada mesin MC-520. Penggunaan program pembangkit program NC ini dalam suatu proses akan dapat menekan anggka kesalahan input data pada saat pembuatan program NC, mereduksi waktu pembuatan program NC yang secara keseluruhan juga akan mengurangi waktu produksi.

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9

Liu, Ri Liang, and Cheng Rui Zhang. "Solutions for Interpreting STEP-NC Based Part Program." Materials Science Forum 471-472 (December 2004): 344–47. http://dx.doi.org/10.4028/www.scientific.net/msf.471-472.344.

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STEP-NC is a new CNC data interface proposed to replace ISO 6983, and has been partly formed into the draft international standard (ISO 14649). In this paper, the STEP-NC-based part program is analyzed, and the general methodology and tools for STEP-compliant application development are introduced. Then a framework for STEP-NC interpreter is proposed based on the SDAI method and the implementation solutions are presented. The EXPRESS compiler is used to convert the milling schema into C++ classes, and the information is extracted from the file in aid of data access tools. The said interpreter, which is fundamental to STEP-NC based machining, is also implemented with supporting tools in the ST-Developer environments. It is used to read the STEP-NC file into ROSE working form, and then extract and organize the manufacturing information in an object-oriented way.

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10

Lu, Yong, Jian Guang Li, Dong Gao, and Feng Zhou. "Reconstructing NC Program-Based Geometrical Error Compensation for Heavy-Duty NC Machine Tool." Advanced Materials Research 314-316 (August 2011): 2082–86. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.2082.

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Heavy-duty NC machine tool is difficult and costly to evidently improve their precision via manufacturing technology only. It is proved being an effective approach to improve machine tool manufacturing precision based on software error compensation. In this paper, an error compensation algorithm based on reconstructing NC program is discussed. Following comprehensive discussion on basic algorithm of positioning error compensation in detail, linear interpolation and circular interpolation movement error compensation algorithm are further sketched in brief. To decrease the machining error, NC program is reconstructed before actual machining. The experiment results show that error compensation methods based on reconstructing NC program can improve profile accuracy of heavy-duty NC machine tools obviously.

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11

Yan, X., K. Shirase, M. Hirao, and T. Yasui. "NC program evaluator for higher machining productivity." International Journal of Machine Tools and Manufacture 39, no. 10 (October 1999): 1563–73. http://dx.doi.org/10.1016/s0890-6955(99)00014-0.

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12

Jing, H. J., Ying Xue Yao, S. D. Chen, and X. P. Wang. "Machining Accuracy Enhancement by Modifying NC Program." Key Engineering Materials 315-316 (July 2006): 71–75. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.71.

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13

Han, Zhen Yu, Po Hu, De Dong Han, and Hong Ya Fu. "A Framework of STEP-NC Manufacturing System Integrating CAD, CAPP, CAM and CNC." Applied Mechanics and Materials 233 (November 2012): 365–68. http://dx.doi.org/10.4028/www.scientific.net/amm.233.365.

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This paper outlines a conceptual framework of STEP-NC manufacturing system, which integrates the entire manufacturing process including CAD, CAPP, CAM and CNC, to make full use of the advantages of the new generation of data model. The STEP-NC manufacturing system consists of five parts and the STEP-NC standard is used to transport the complete product information. The intelligent CNC in this system can parse STEP-NC program directly so that no translation is needed and the part programs are reusable. Networked manufacturing can be realized by implementing this new framework of STEP-NC manufacturing system.

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14

Cheng, Hsin Yu, and Yung Chou Kao. "Five-Axis NC Program Conversion for Inclined Plane Machining." Applied Mechanics and Materials 479-480 (December 2013): 333–37. http://dx.doi.org/10.4028/www.scientific.net/amm.479-480.333.

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Machining processes on an inclined plane include mostly hole making, profiling, and pocketing. It comprises of 80% - 90% cutting process in five-axis machining and is therefore very important in multi-axis machining work. However, five-axis machining processes are normally difficult to introduce and to use because five-axis CAD/CAM and post-processor are normally demanded to generate five-axis NC program even though it is for the 2D contour machining on a plane with inclined angle. Therefore, this paper studies the inclined plane machining methods and extends traditional three-axis milling machining processes and methods so as to directly convert 2-1/2 and three-axis NC program into five-axis machining program to ease the application of five-axis machining processes. This study integrates the developed three-axis NC program interpreter, inclined plane coordinates transformation, and post-processor to simply the inclined plane NC programming. Two-dimensional NC program on a plane can be converted into five-axis NC program on the inclined-plane by the proposed methodology. Case study has been utilized to verify the utilization and correctness of the proposed methodology

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15

Zhang, Cheng Rui, and Ri Liang Liu. "On CNC Machining and Part Program Preprocessing Based on STEP-NC." Materials Science Forum 471-472 (December 2004): 326–29. http://dx.doi.org/10.4028/www.scientific.net/msf.471-472.326.

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STEP-NC is a new CAM/CNC interface and an extension of STEP into numerical control machining. It has been partly formed into draft international standard (ISO 14649) and is expected to replace ISO 6983 in the near future. In the first section of this paper, the STEP-NC data model is analyzed and those parts that are relevant to NC milling process are abstracted. Then issues involved in NC part machining based on STEP-NC paradigm are discussed including NC programming and the machine control. Based on the analysis, a prototype system is outlined and partly developed with libraries and software tools in ST-Developer environment to interpret the part program into internal data format and to assist the shop floor level planning. Finally the user interface of this system is introduced.

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16

Yuan, Guo Qiang, Cheng Rui Zhang, Yuan Cai Zhang, and Ri Liang Liu. "Information Extraction Method for a STEP-Compliant NC Program." Advanced Materials Research 139-141 (October 2010): 1169–73. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1169.

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STEP-NC provides a way for intelligent NC manufacturing and seamless connection of the computer systems in design and manufacturing industries. It also makes it a must for a new breed of CNC machines to interface directly with the new part programs in STEP format (ISO 10303-21). In this paper, the data model and structure of part programs based on STEP-NC (STEP AP 238) are overviewed. Available tools are discussed and a method of extracting the manufacturing information from STEP-NC physical files is presented, and corresponding software module are developed in ST-DeveloperTM environment. With the aid of the STIXTM and ROSETM C++ library, the general information, feature information, technological information are extracted from the STEP-NC file and organized in a tree structure according to the hierarchy of the data model, which is essential to further usage of the manufacturing data, such as process planning, tool-path generating etc.

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17

Chen, Zuo Yue, Xiao E. Wang, and Mei Yang. "Complex Parts Design Based on Macro Programming." Applied Mechanics and Materials 635-637 (September 2014): 1386–89. http://dx.doi.org/10.4028/www.scientific.net/amm.635-637.1386.

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CNC programming is from the part drawings to get the whole process of NC program, the core of the work is to generate tool paths, and then dispersed into the knife sites generated by the NC post-processing program. As one of the key technologies of CNC machining, the preparation of the efficiency and quality of its programs largely determine the processing accuracy and production efficiency. Engineering approach of this research complex part features macro programming design.

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18

Liu, T., Zhen Yu Han, Yong Zhang Wang, and Hong Ya Fu. "Code Translator of STEP-NC Based on ISO14649." Applied Mechanics and Materials 10-12 (December 2007): 498–502. http://dx.doi.org/10.4028/www.scientific.net/amm.10-12.498.

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For the application of STEP-NC in NC system, an STEP-NC code translator is exploited. Firstly, summarizes the limitation of conventional standard ISO6983 and the superiority of STEP-NC. After an analysis on two different generating methods of STEP-NC program, introduces the exploited STEP-NC code translator based on ISO14649. According to inner logical relation, the code translator is composed by six functional modules, an operating principle chart is presented, function and realizing method of every module is disserted on. At last, exampled with a program which includes planar face, pocket, slot, Bezier surface and replicate feature of round hole, planning the whole toolpath of the program using extracted information about workingstep, feature and operation by the exploited STEP-NC code translator. A cutting simulation is made to the toolpath and the workpiece model. The result proves the feasibility of the STEP-NC code translator.

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19

Monkova, Katarina, and Peter Monka. "Group Technology Utilization inside New Software Application." Applied Mechanics and Materials 229-231 (November 2012): 2765–69. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.2765.

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The article deals with the utilization of group technology inside new software. This software aids the multivariant manufacturing process plans creation and consequently it supported the processing of information in several versions. It can be used for optimization according to the selected criteria, for the generation of technological documentation and NC programs on the basis of hybrid approach. NC program, as one of process plans form, can be for individual parts generated automatically on the basis of group representative that is created as 3D model in CAD/CAM system. The output of CAM module – CL data – is imported into new software application as the basis of NC program. System was called Individual Application system – IAS.

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20

Nakamoto, K., K. Shirase, Akifumi Morishita, E. Arai, and T. Moriwaki. "A New Architecture of Tool Path Generation for Five-Axis Control Machining." Key Engineering Materials 291-292 (August 2005): 501–6. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.501.

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NC machine tools, which are widely employed in manufacturing systems, are basically driven by NC programs. However, it requires extensive amount of time and efforts to generate high quality tool paths before a machining operation. An NC program for five-axis control machining is more difficult to generate because the motion of machine tool is more complicated. In this paper, a new architecture is proposed to autonomously control the machine tool without an NC program for more rapid and flexible machining. A technique called digital copy milling is developed to generate the tool paths in real time based on the principle of copy milling. It means that the cutting parameters can be adaptively controlled in order to maintain stable cutting process and to avoid the cutting troubles. In the experimental verification, the improved digital copy milling system for five-axis control milling successfully detected and avoided tool collision in real-time.

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21

Gao, Dong, Ying Xue Yao, Wing Bun Lee, and Chi Fai Cheung. "A Framework of a NC Program Translator for Virtual Machining." Applied Mechanics and Materials 10-12 (December 2007): 782–85. http://dx.doi.org/10.4028/www.scientific.net/amm.10-12.782.

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Virtual manufacturing (VM) is an emerging technology that provides a digital tool for the optimization of the production efficiency through simulations prior to the start of actual production. A NC program translator is one of the crucial components for virtual machining which allows the simulation and verification of NC tool path before actual machining. In this paper, a framework of a NC program translator for diamond turning of precision optics is presented.

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22

SHIRASE, Keiichi, Masatoshi HIRAO, Takeshi YASUI, Hiroshi KAWABATA, and Yoshio FUJIMURA. "Improving Productivity in NC Lathe Turning Based on NC Program Diagnosis System (1st Report)." Journal of the Japan Society for Precision Engineering 60, no. 2 (1994): 235–39. http://dx.doi.org/10.2493/jjspe.60.235.

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23

KAWABATA, Hiroshi, Keiichi SIIIRASE, Kouichi SASAYAMA, Yoshio FUJIMURA, and Takeshi YASUI. "Improving Productivity in NC Lathe Turning Based on NC Program Diagnosis System (2nd Report)." Journal of the Japan Society for Precision Engineering 60, no. 4 (1994): 576–80. http://dx.doi.org/10.2493/jjspe.60.576.

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24

Yang, Lin, Rui Nan Wu, and Jin Yuan Wang. "The Study on the STEP-NC Program Generation for Milling Operations." Applied Mechanics and Materials 197 (September 2012): 362–66. http://dx.doi.org/10.4028/www.scientific.net/amm.197.362.

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STEP-NC is a new data model for data exchange between CAD / CAM and CNC, which provides rich information for CNC machine tools and tells CNC “what to do”rather than “how to do”, overcomes many shortcomings of the traditional G&M codes and has become a hot research issue now. How to efficiently and cost-effectively generate the STEP-NC program is a very crucial problem. Although some domestic scholars have done some research about STEP-NC program generation, most of them do second development base on ST-Developer software. The paper developed a STEP-NC program generation module by using the VC++6.0 and CAD / CAM software. The module can read AP203 file generated by CAD system, identify manufacturing features according to its geometry information and conduct process planning to generate STEP-NC file according to ISO14649 standard. This module has been proved effectively by an instance.

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25

Cao, Zhong Liang, Xu Tang Zhang, Ya Xin Yan, and Xiao Feng Chen. "Automatic Generation of NC Programs for Cylinder-Type Parts." Applied Mechanics and Materials 26-28 (June 2010): 1195–99. http://dx.doi.org/10.4028/www.scientific.net/amm.26-28.1195.

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A new machining feature model for cylinder-type parts is proposed. Through the use of the model in process planning, the NC program can be generated by modular approach. NC machining feature classification based process design method is a good solution to the integration of the traditional and NC processes. With the machining feature as unit, parametric programming technique is applied to the NC code generation which can improve the efficiency and quality of the NC program design. The proposed method has been practically demonstrated in the enterprise information system.

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26

Liu, Ri Liang, Yi Ran Wang, Cheng Rui Zhang, and Yuan Fan Xu. "A STEP-Compliant Approach to NC Programming of Freeform Surfaces." Advanced Materials Research 102-104 (March 2010): 479–83. http://dx.doi.org/10.4028/www.scientific.net/amr.102-104.479.

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In order to realize STEP compliant NC manufacturing, STEP-NC (ISO 14649) has been developed over last decade by the International Standard Organization as a new data model for CNC programming. This paper proposes a framework for STEP compliant NC programming of the freeform surfaces. The system is supposed to read the CAD model produced by commercial CAD/CAM software and represented in STEP format, prepare the process information, and finally generate the STEP-NC compliant program. Major issues relating to CAD data extraction, toolpath calculation and NC program generation are presented.

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27

NOMOTO, Kohei, Kozo SHIMA, Masaharu WAKAMATSU, and Yutaka SHIMIZU. "Attention Allocation in Program Check for NC Manufacturing." Journal of Japan Society for Fuzzy Theory and Intelligent Informatics 16, no. 5 (2004): 452–62. http://dx.doi.org/10.3156/jsoft.16.452.

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28

Makoto, Haga. "Machining program execution method for an NC device." Computer Integrated Manufacturing Systems 10, no. 2 (May 1997): 168. http://dx.doi.org/10.1016/s0951-5240(97)84307-8.

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29

Masaki, Seki, Matsumura Teruyuki, and Shinozaki Satoru. "Method of animation plotting of NC machining program." Computer Integrated Manufacturing Systems 10, no. 2 (May 1997): 178. http://dx.doi.org/10.1016/s0951-5240(97)84351-0.

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30

Dobson, L. Allen. "Controlling Pharmacy Costs in the NC Medicaid Program." North Carolina Medical Journal 64, no. 6 (November 2003): 280–82. http://dx.doi.org/10.18043/ncm.64.6.280.

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31

Mou, Wen Ping, Ying Guang Li, Wei Ming Shen, and Li Min Tang. "A Postprocessor for Generating Multi-Axis Polynomial Interpolation NC Machining Program." Advanced Materials Research 548 (July 2012): 479–83. http://dx.doi.org/10.4028/www.scientific.net/amr.548.479.

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Multi-axis CNC machining shows great advantages in manufacturing parts with geometries being defined by complex surfaces. NURBS (Non-Uniform Rational B-Spline) interpolation and polynomial interpolation are two new types of interpolation to improve productivity. Compared to the NURBS interpolation, the polynomial interpolation can gain higher productivity. However, no commercial software tool is available to generate polynomial interpolation CNC programs. This paper proposes a postprocessor to generate polynomial interpolation multi-axis CNC program. A case study with simulations demonstrated that the polynomial interpolation program generated by the proposed postprocessor has higher machining efficiency than liner interpolation and NURBS interpolation program.

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32

Sakurai, Shintaro, Hideki Aoyama, and Noriaki Sano. "Generation of NC Program for Realizing High Speed Feed Rate of Cutting Tool." Key Engineering Materials 523-524 (November 2012): 398–403. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.398.

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As the feed rate of cutting tools is influenced by the quality of NC programs, this causes two problems when cutting freeform surfaces using NC machine tools, one is the feed rate does not reach the specified value, and the other is the quality of the machined surface decreases due to the large acceleration and deceleration of the control axes. One reason for these problems is that the method to generate cutter location data does not take into consideration the sampling time of the NC controller. To improve these problems, the approximation of offset curves with a series of circular arcs has generally been proposed. But conventionally, circular arc interpolation algorithms are complicated and not rational. So, in this study, we proposed two simple NC program generation methods. (1) Approximate the offset form with circular arcs based on the location of the center of curvature. (2) Make the distance between the cutter location points of the NC data an integral multiple of the “feed rate command F × sampling time T”. We also confirm the effectiveness of the proposed methods by simulations and experiments.

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33

Kaldashev, Tsvetan. "DEVELOPMENT OF A POSTPROCESSOR FOR TURNING CENTER AND MULTI-TASK MACHINE WITH MULTI-CHANNEL CNC SYSTEMS." Proceedings of CBU in Natural Sciences and ICT 1 (November 16, 2020): 28–32. http://dx.doi.org/10.12955/pns.v1.117.

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This article discusses the possibility of developing a postprocessor for turning center with 2 turrets and a multi-channel CNC system with NC program format characteristic of machine Mazak Integrex I series. Typical for these CNCs is the usage of two support programs - one for each turret. The CAD / CAM system PTC Creo is used to solve the problem, where tool transitions are developed for machining the workpieces. The postprocessor is software that translates the CL Data file i.e. turns it into a NC program with preparatory, technological, and supplementary commands to control the machine. G-POST, which is integrated into the PTC Creo CAD / CAM system, is used to develop the post-processor. To solve the problem, a specialized programming language FIL (Factory Interface Language) is used which, with its features and capabilities to work with files in ASCII code, achieves the ultimate goal - NC program in format characteristics suitable for machines Mazak Integrex I series.

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Аверченков, Андрей, Andrey Averchenkov, Инна Колошкина, Inna Koloshkina, Сергей Шептунов, and Sergey Sheptunov. "Science intensive technology of blank machining on NC machines and programming in CAM-system." Science intensive technologies in mechanical engineering 2019, no. 4 (April 23, 2019): 31–39. http://dx.doi.org/10.30987/article_5c90a597ca8537.11895973.

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The paper reports the consideration of the procedure for the development of executive programs and documentation for NC equipment in ADEM CAD/CAM/CAPP integrated design-technological computer system. The possibilities for the automation of executive program preparation for NC equipment using design elements of the 3D model, and also complex solutions with the aid of CAM Expert system are described.

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35

Li, Xian Yi, Jian Zhong Fu, and Ji Qiang Li. "Key Technologies Research for Impellers Machining Based on NX." Applied Mechanics and Materials 101-102 (September 2011): 1031–34. http://dx.doi.org/10.4028/www.scientific.net/amm.101-102.1031.

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Tool path generation, post-processing and verification and simulation of NC program are key technologies which are investigated in this research for manufacturing impellers. Generation of tool path aims at producing the cutting tool path. Post-processing transforms the cutter location file (CLSF file) of the tool path to the NC code which NC machine can recognize. Verification and simulation of NC program aims at proving the accuracy of program, thus the interference and collision can be avoided. When tool path is planned, increasing the machining efficiency during the rough and semi-finish milling process is the main consideration. Increasing machining accuracy is an important consideration for final finish milling.

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36

Yuan, Feng. "Numerical Simulation of Whole Impeller for 5-Axis Machining Based on UG." Applied Mechanics and Materials 16-19 (October 2009): 124–29. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.124.

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The manufacturing template of whole impeller 5-axis machining based on UG was re-developed with NURBS interpolation principle and UG/knowledge fusion technology, and 5-axis NC machine and part model were established, each parts of machine were simulated in 3D motion with reading NC code. Human-computer interaction was processed fast with the template and guiding of digitized manufacturing, the cutting tracks of half-finishing machining and finishing machining for whole impeller were produced fast. The template involves 3-D modeling, craft flow programming of NC machining, program of NC machining and etc. and is tested on 5-axis NC machine, it is indicated that the scheme and program of NC machining for whole impeller is feasible.

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Xie, Fan, Ying Liu, Zhan Dong Liu, and Mgambo Sharifa. "UG-CAM Point Processing with NC Machining Simulation Software of Integrated Application." Applied Mechanics and Materials 268-270 (December 2012): 906–9. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.906.

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As the world-famous, powerful and the most representative CAM software technology, UG has the most abundant processing strategy of the NC processing, design, programming software. Taking a general hole CNC processing technology as an example, UG programming operation skills and programming operation process are discussed, processing function of the point-to-point operation is used to complete general hole processing. Through UG – CAM, NC machining program is generated into simulation system for processing simulation, and eventually NC simulation processing and NC program are generated.

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She, Chen Hua, Jian Yu Lin, and Shen Yung Lin. "Numerical Control Programming System for Mill-Turn Machining." Applied Mechanics and Materials 799-800 (October 2015): 1154–57. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.1154.

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To develop the numerical control program of mill-turn machine, the traditional method is to apply the computer-aided design and manufacture software to construct the geometric model, then to generate tool path and convert the path to NC program. For complex numerical control program of mill-turn machine, such as the multiple turret synchronized motion machining, because of the need to control time sequence, the NC program is highly required on using of dedicated software system. The objective of this paper is to establish a mill-turn machining system with window interface of via the language of Borland C++ Builder. The developed system can plan the machining path of simple mill-turn features, including turning shape, axial slot milling, and radial packet milling, and generate the corresponding NC program. For the milling functions, after the offset coordinates are calculated along the polygonal angle vector in the center point of cutters, the NC program is generated. For the turning functions, through importing the 2D DXF (Drawing Exchange Format) file and inputting related configurations, the entity coordinates can be retrieved and the corresponding NC program is then converted. By means of the solid cutting simulation software and practical cutting experiment for the generated numerical control program, the accuracy of the tool path generation algorithm is confirmed. Hence, the cost of purchasing commercial software can be saved and the time of generating program can also be decreased so that the working efficiency can be enhanced.

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Dodok, Tomáš, and Nadežda Čuboňová. "Optimization and efficiency of toolpath generation in CAD/CAM system." MATEC Web of Conferences 299 (2019): 03001. http://dx.doi.org/10.1051/matecconf/201929903001.

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The optimization has an important role in machining processes preparation of NC programs. The article deals with the possibilities of the optimization using at utilization of the NC tool paths in CAD/CAM systems. The experiments deal with the possibility of optimization option in concrete CAD/CAM system. Particularly were compared optimized toolpaths from CAD / CAM system Creo with toolpaths optimized in an optimization program Optimizer based on genetic algorithms.

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Ye, Xuan Lin. "Based on Rub a Drum of Four Axis Programming and Virtual Machining Optimization Research." Applied Mechanics and Materials 727-728 (January 2015): 794–98. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.794.

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Analysis of the features of Mastercam, Solidworks and Vericut software and their respective advantages, Proposed by Solidworks, MastercamX and VERICUT three software are combined as the optimization platform to build the NC machining program integrated modeling, assembly, processing, simulation and Optimization in one. Author take rub a drum processing for an example, in the Solidworks modeling, assembly, in the Mastercam X programming and generate the NC program, through VERICUT for the simulation and optimization of NC program, Examples show the rationality of optimization, avoiding the collision, the production and processing of the interference, the over cut phenomenon, Three software effectively combined, play a very high efficiency, improve the using efficiency of NC machine tool, has the certain reference significance to the actual production.

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Liu, Ri Liang, Cheng Rui Zhang, A. Nassehi, and S. T. Newman. "A STEP-NC Programming System for Prismatic Parts." Materials Science Forum 532-533 (December 2006): 1108–11. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.1108.

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To comply with STEP-NC (ISO 14649), a new paradigm for NC programming, many computer systems involved in NC manufacture are required to reshape in both functionality and structure. This paper reports a feature-based NC programming system for prismatic parts to be machined using STEP-NC machine tools. The proposed system consists of three functional modules, i.e. a feature-based modeler, a process planner and a part program generator. The modeler provides a graphical environment for the part model, which is created by adding manufacturing features on a 2.5 D sweep primitive shape. The process planner determines which operations are to be performed for the features, generates workingsteps and then produces a reasonable workplan. Finally both the geometrical and the process information are passed to the part program generator to form a complete ISO 14649-compliant file. The proposed system is demonstrated through the generation of the STEP-NC part program for an example part, and major issues such as the feature-operation mapping and the workingstep sequencing etc are also addressed in this paper.

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Armasoiu, Giorgiana Elena. "Accurate NC Program Generation Based on New Model Editing Process." Applied Mechanics and Materials 809-810 (November 2015): 805–10. http://dx.doi.org/10.4028/www.scientific.net/amm.809-810.805.

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This paper emphasizes the benefits of part-model editing process that does not depend on hystory-based modelling system. The use of synchronous technology in mechanical engineering applications allows the NC programmer to efficiently generate the NC program regardless the source of 3D model. The programming and machining process can be more efficient if the intuitive geometric changes on 3D model are allowed. Synchronous technology makes possible NC programmer’s intervention over 3D model geometry, without breaking the rules defined in CAD. Synchronous technology works with both, native and non-native models and it is available in NX and Solid Edge. With synchronous technology, the changes are performed with or without regard to the history of the model.

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Liu, Ri Liang, Yuan Fan Xu, Yi Ran Wang, and Cheng Rui Zhang. "Process Planning and Program Generation for STEP-Compliant NC Manufacture of Complex Surface Components." Key Engineering Materials 419-420 (October 2009): 441–44. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.441.

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A framework for process planning and NC programming based on STEP and STEP-NC data model is proposed in this paper. The STEP standard and its data structure for CAD models, especially the NURBS based representation of complex surfaces is analyzed. Then the general strategy for process planning using the STEP-NC data structure is presented, and the calculation of cutter contact points and cutter location data for producing complex surfaces based on the geometrical information is addressed. Finally a prototype system is developed for demonstration of the proposed STEP-compliant NC programming approach for complex surface components.

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Nishida, Isamu, Ryo Tsuyama, Ryuta Sato, and Keiichi Shirase. "Customized End Milling Operation of Dental Artificial Crown Without CAM Operation." International Journal of Automation Technology 12, no. 6 (November 5, 2018): 947–54. http://dx.doi.org/10.20965/ijat.2018.p0947.

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A new methodology to generate instruction commands for real-time machine control instead of preparing NC programs is developed under the CAM-CNC integration concept. A machine tool based on this methodology can eliminate NC program preparation, achieve cutting process control, reduce production lead time, and realize an autonomous distributed factory. The special feature of this methodology is the generation of instruction commands in real time for the prompt machine control instead of NC programs. Digital Copy Milling (DCM), which digitalizes copy milling, is realized by referring only to the CAD model of the product. Another special feature of this methodology is the control of the tool motion according to the information predicted by a cutting force simulator. This feature achieves both the improvement in the machining efficiency and the avoidance of machining trouble. In this study, the customized end milling operation of a dental artificial crown is realized as an application using the new methodology mentioned above. In this application, the CAM operation can be eliminated for the NC program generation, and tool breakage can be avoided based on the tool feed speed control from the predicted cutting force. The result shows that the new methodology has good potential to achieve customized manufacturing, and can realize both high productivity and reliable machining operation.

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AOYAGI, Daisuke, Katsuji OOGANE, Shinichi NAKAJIMA, and Yasushi UMINO. "607 A Study on Structurized Processing NC Programs and an Automatic Program Creation." Proceedings of Conference of Hokuriku-Shinetsu Branch 2001.38 (2001): 179–80. http://dx.doi.org/10.1299/jsmehs.2001.38.179.

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Miao, Zhi Yi, De Qing Yang, and Hui Yu. "NC Milling of Profiled Screw." Advanced Materials Research 102-104 (March 2010): 767–70. http://dx.doi.org/10.4028/www.scientific.net/amr.102-104.767.

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Machining of the variable pitch screw is difficult in mechanical manufacturing and that of variable pitch and depth screw is more difficult.This paper argues about applying macro program to machine profiled screw in NC milling machine tool and the result is of satisfaction.This provides another method for the machining of profiled screws.

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Wang, Yu, Jia Xin Guo, Bao Tao Wang, and Yuan Sheng Zhai. "NC Machining Program Simulation and Experiments for Pelton Runner." Materials Science Forum 836-837 (January 2016): 417–24. http://dx.doi.org/10.4028/www.scientific.net/msf.836-837.417.

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With pelton turbines and other complex three-dimensional structure cavities that contains various shaped surfaces and all kinds of larger curvature, the three-axis CNC machine with a tool rotary to achieve the four coordinate overall Pelton CNC machining. According to processing characteristics of pelton runner, the paper determines the selection of materials and the overall structure of the tool. And the appropriate way of milling and milling parameters are made. The overall processing program and processing parameters of pelton runner are designed on this basis. The feasibility of the process and cutting route are verified by the simulation of cutting route and experiments.

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Wang, Weixin, and Kai Zhou. "An extensible NC program interpreter for open CNC systems." International Journal of Advanced Manufacturing Technology 94, no. 1-4 (August 22, 2017): 911–23. http://dx.doi.org/10.1007/s00170-017-0974-x.

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Zhou, Liang, Yan Hai Ren, Gang Cao, and Zhi Rong Liao. "Research on USB Communication in the Compiled-Typed NC System." Advanced Materials Research 500 (April 2012): 501–5. http://dx.doi.org/10.4028/www.scientific.net/amr.500.501.

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The compiled-typed NC system compiles NC program into object codes and sends them to slave computers. The object codes generated is a large amount of data. To ensure the data transmission fast and real-time, USB communication is adopted and researched in this paper. The design of USB driver program and communication program in the upper computer and slave computers is mainly introduced.

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Petreça, Daniel Rogério, Enaiane Cristina Menezes, Paula Fabricio Sandreschi, Felipe Fank, and Giovana Zarpellon Mazo. "Neck circumference as a discriminator of obesity in older women enrolled in a physical activity program." Brazilian Journal of Kinanthropometry and Human Performance 19, no. 6 (December 29, 2017): 710–19. http://dx.doi.org/10.5007/1980-0037.2017v19n6p710.

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The aim of this study was to evaluate neck circumference (NC) as a discriminator of overweight and obesity and to establish cut-off points for physically active older women. The sample consisted of 170 older women (69.5 ± 6.8 years) practicing physical activity. Anthropometric measures (body weight, height, waist circumference – WC, and NC) were obtained and the body mass index (BMI) was calculated. Correlation analysis was performed and ROC curves were constructed. NC was significantly correlated with BMI (rho = 0.656; p<0.0001) and WC (r = 0.561; p<0.0001). Correlating BMI with NC, areas under the ROC curve of 0.819 (p=0.0001) for overweight and of 0.902 (p=0.0001) for obesity were obtained, with suggested cut-off points of 33.07 and 34.05 cm, respectively. Correlating WC with NC, areas under the ROC curve of 0.711 (p=0.0014) for moderate risk (WC) and of 0.864 (p=0.0001) for high risk were obtained, with suggested cut-off points of 32.15 and 34.15 cm, respectively. NC was associated with BMI and WC. An NC ≥ 34 cm was a risk factor for obesity and abnormal body fat distribution in the older women studied. This anthropometric parameter is an alternative to discriminate overweight and obesity in physically active older women.

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