Study on advanced machining conception on numerically controlled milling machines for aircraft complex component parts (original) (raw)
Related papers
The Analyses of Working Parameters for a 3D Complex Part Manufacturing by CNC Machine
Applied Mechanics and Materials, 2015
In this paper I want to presents the process for manufacturing one complex parts made by aluminum alloy. For manufacturing this complex part I used CAD/CAM software, CNC milling machine and same special tools. Starting from the 3D model made in SolidWorks was manufactured this complex part, using new strategies for CNC milling. To be made this chain of pieces it is necessary to use smart software for this process.
Journal of Applied Engineering Science
Karaganda state technical university, Kazakhstan The given article provides material on the development of the CADS applied for production processes of component part machining for single-piece production and repair conditions. The article describes technique used to organize a data fl ow and hose methods of machining which cannot be applied under these conditions of machining. This research uses graph theory. The article describes the developed algorithm for machining planning of details. A mathematical model of transitions in the technological process for the processing of parts has been obtained.The developed design CADS reduces the number of errors in the development of production processes. The article describes database for machining planning. In order to form input data, knowledge of production processes of analogous machine parts or products production is not required. Thus developed models of system determines of machine-part production stages. This system gives schemes of its basing, a set of bases and an order of their preparation and forming of schemes of technological dimensional chains. This system counts and recounts interoperational dimensions. Developed models and system allows to increase amount of output information to the level of operational fl ow charts. The designed system gives the chance of its use in modern multiproduct. This system is universal, multifunctional.
Computer Aided Design and Manufacturing
Journal of emerging technologies and innovative research, 2019
CAD/CAM is a 21st century technology that related to the computer involvement in design and manufacturing. CAD/CAM is a latest technology developed in recent years. The CAD has main advantages over traditional methods, it enables the designer to examine a large number of design solutions and CAM simulate the work task may be performed in order to obtain the values of various performance measures in real manufacturing world. This paper discusses the advantages obtained from CAD/CAM integration. The applications of CAD/CAM integration used in CNC milling machine and virtual manufacturing operations have demonstrated the effectiveness of discuss methodology. Keywords—CAD, CAM, Virtual manufacturing, traditional method
Laser-aided direct metal tooling of manufacturing aviation details on CNC machine
IOP Conference Series: Materials Science and Engineering
This paper discusses the effectiveness of the use of hybrid technology based on Laseraided Direct Metal Tooling with subsequent machining as an alternative to traditional methods for producing products of a complex profile for the aviation industry. The aspects of the application of Laser-aided Direct Metal Tooling in the production cycles of manufacturing products passing through the final assembly operations are considered. The paper proposes an alternative manufacturing technology through the use of Laser-aided Direct Metal Tooling at the stage of design and technological study of the manufacturing cycles of individual assembly units. The objective function of ensuring high requirements for the accuracy of the relative position of the part in the assembly, reducing the mass and dimensions of the product, which is important for modern aviation systems. A technological solution is proposed to provide technical indicators of the objective function based on combining the advantages of laser, hybrid, and additive technologies in the working area of technological equipment. Considered technical solutions for the implementation of the proposed hybrid technology in the manufacture of critical parts of the aviation industry. The aspects of the production of parts are considered from the point of view of reducing the error in the relative position of the actuating surfaces of the product, an analysis is made of the machining errors in the process of the proposed production technology, with respect to the errors arising from traditional production cycles of parts of this type.
Computer aided process planning in aircraft manufacturing
Computer-Aided Design and Applications, 2008
Aircraftstructuralpartsmakearound1%ofthetotalaircraftcomponents.Atpresent,theproduction cycleofseveralcomponentsfamiliesiswithintherangeoffewhours.Conversely,theproductionof structuralpartsismainlyahuman-madeoperationwithmanufacturingcomplexityincreasingwith thepart'smorphology.Thedelicatethinelementsandthepresenceofcomplexsurfaces-mainly ruledsurfaceswhichacquirestheexternalaircraftbodyshape-setstheproductiontimeof mechanicalstructuralpartsrangingfromfewhours(forbasicparts)uptoover20days(forcomplex parts).Themainlossoftimeisidentifiedintheprocessplanningfield.Thispaperpresentsatfirsta reviewoftheproductionnumericalchain,andthenoffersareviewofexistingComputerAided ProcessPlanning(CAPP)softwareandtheirpointsoffailures.Wefollowwiththepresentationof theUSIQUICKprojectandtheresultingCAPPsoftwarefunctionsandprototype.Weconcludethe paperwithareviewofthemainresultssettingthedomainofourcurrentandfutureresearch.
Formal design of structure process in machining parts
Applied Mathematical Sciences, 2017
In article the theoretical aspects connected with selection of complete sets of technological bases for orientation semi-finished product at processing of details are considered. Simulation is based on a comprehensive consideration of the complete set of dimensional relationships between the surfaces of parts for all degrees of freedom simultaneously. The conditions of a formal search of technological bases for preparation of orientation, as well as the sequence of processing the workpiece surfaces are described.
An Intelligent Approach to High Quantity Automated Machining
2011
Purpose: To investigate the possibility of application of knowledge-based expert systems to facilitate the task of techno-economical feasibility analysis of utilization of special purpose machines for high quantity production tasks. Also, to study the possibility of assisting special purpose machine designers in applying knowledge-based expert systems in the design task in order to reduce required machine design time, improve machine design efficiency, and eliminate possible human errors. Design/methodology/approach: Development of a knowledge-based expert system has been proposed to help decide where to utilize special purpose machines to accomplish the production task. The knowledge-based expert system consists of a rule-base which contains qualitative human knowledge and expertise in the form of if-then rules; and a database which contains qualitative information of machining operations, and characteristics of standardized special purpose machine components. Findings: A case study has been presented where an analysis has been made on the basis of techno-economical considerations for a typical part with three machining operations to be produced in large quantities. It has been concluded that for the given production task, special purpose machines would result in a significant 59% reduction of costs compared to CNC machines, and 95.5% compared to traditional machines. The proposed methodology also reduces the time and effort needed for decision making on utilization of special purpose machines and determination of machine layout. In addition, it minimizes the level of expertise required to perform these functions and eliminates possible human errors. Research limitations/implications: The current system focuses on drilling and drilling-related operations which cover about 60% of all machining operations. More work is needed to cover other machining operations including milling. Also the KBES developed currently works on a standalone basis. Work is in progress to integrate it with a 3D CAD modelling system. Upon completion the information could be directly extracted from the CAD system, eliminating the need for manual data input by the user. Originality/value: In spite of a large number of publications on machine tool design in the literature, publications on special purpose machines are very limited. The method of techno-economical analysis presented here for utilization of special purpose machines in comparison with other production alternatives is of great value to manufacturing engineers and specialists. Also the methodology presented for machine design and implementation is highly valued by machine tool designers and manufacturers.
The engineering design process is a series of steps that engineers follow to come up with a solution to a problem. Many times the solution involves designing a product (like a machine or computer code) that meets certain criteria and/or accomplishes a certain task. o This process is different from the Steps of the Scientific Method, which you may be more familiar with. If your project involves making observations and doing experiments, you should probably follow the Scientific Method. If your project involves designing, building, and testing something, you should probably follow the Engineering Design Process. If you still are not sure which process to follow, you should read Comparing the Engineering Design Process and the Scientific Method. The steps of the engineering design process are to: o Define the Problem o Do Background Research o Specify Requirements o Brainstorm Solutions o Choose the Best Solution o Do Development Work o Build a Prototype o Test and Redesign Engineers do not always follow the engineering design process steps in order, one after another. It is very common to design something, test it, find a problem, and then go back to an earlier step to make a modification or change to your design. This way of working is called iteration, and it is likely that your process will do the same!
Analyzing possibilities of improving machinning process planning and optimization
Main activities of the technological preparation of production refer to the process planning and optimization. Process plans as the most significant objects of optimization in production systems are characterized by variant solutions in all stages, from the selection of raw material and manufacturing technologies, types and sequences of processes and machining operations, types and characteristics of manufacturing resources, machining parameters and strategies, with machining time, cost, accuracy and surface quality as main objective functions of process planning optimization. Main goal of this paper is to analyze the possibilities of improving technological preparation of production, or precisely, to improve process planning and optimization of manufacturing process plans through the application of feature technologies and the considered simulation technique. The application of feature technologies will be analyzed from the aspect of possible integration of product design and process planning, while the application of the simulation technique within the CAD/CAM system will test the influence of variants of machining operations and machining strategies on the process planning optimization from the aspect of machining time. process planning, optimization, feature technologies, simulation technique Two basic activities within the product development are product design and product manufacturing which ought to be integrated and connected at the greatest possible extent. Technological preparation of production represents the main integr that should meet design requirements of product designers on one hand, and to adopt manufacturing possibilities of production on the other hand [1]. Main activity of the technological preparation refers to the manufacturing process planning and optimization. The imperative of modern global production is to generate rational and optimal process plans, in accordance with the basic optimization criteria such as productivity, cost-effectiveness, machining accuracy and surface quality [2]. Process planning represents the complex multi-dimensional problem that depends on the input data and set requirements according to the observed product/s, as well as the techno-economic conditions and subjective preferences of the product designer. The most important input data for process planning are product drawings which possess information about materials, dimensions, machining accuracy, surface quality, production volume and available manufacturing resources, such as raw materials, machines, tools, fixtures, measuring instruments etc. Accordingly, various process plans can be predicted for the same manufacturing conditions and which can be evaluated using various optimization criteria [3]. ng conditions, modern CAD programming systems based on feature technologies, or the application of features in modeling, are mainly used for product design and for defining technological documentation. However, the attention of product designers is focused on realizing functional characteristics of products and parts, whereby they use features in modeling which generally do not match the typical manufacturing features. By that, the process planning, as well as the integration of CAD, CAPP and CAM systems is more difficult to achieve [4]. According to above mentioned, the first task of this paper is related to the analysis of possibilities of modeling products by applying features that match with manufacturing features which are used in machining processes. In this way, it is intended to facilitate the manufacturing process planning, as well as the integration of activities of product design and process planning through direct application of features from CAD systems to machining process within CAM systems.
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2005
At present, airframes are mainly composed of monolithic components, instead of small parts joined using welding or riveting. Inside this category, ribs, stringers, spars and bulkheads can be mentioned. After milling they are assembled and joined to the aircraft skins, the latter being milled as well. The aim of these parts is to obtain a good strengthto-weight ratio, due to their homogeneity.