The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The machine tool accuracy is comprehensively affected by geometric, thermal, and cutting force-induced errors. A key step in accuracy design and error compensation is error origins analysis. The object of this study is a MCH63 Precision Horizontal Machining Center. Based on the volumetric error model and using the measurement of error origins, the effects of geometric, thermal, and cutting force-induced...
5-axis CNC machining is one kind not only may realize the ordinary machining, but may also complete from the rough cutting to the post processing entire flow new cutting way. This article develops special software to plan cutting path for ruled surface impellers. By fitting sampling data points of an impeller blade into a curve, a model of ruled surface blade of an impeller is built up. Furthermore,...
A new high-speed milling scheme for machining complex revolutionary spiral curved surfaces by using the whirlwind milling technique is presented. The fundamental relationship equations of this milling technique are discussed based on 5-axis CNC specialized rotary-table horizontal milling machines. And the main parameters in generating tool paths are analyzed carefully. With this new method, a wider...
Pipe Cutting machine has been widely used in ocean engineering, pipeline engineering, etc. According to the application of pipe cutting machine in the construction of offshore platform, a novel open architecture CNC system based on Industrial Personal Computer (IPC) and Digital motion controller (DMC) applied in a 6-axis flame Pipe Cutting machine is designed. Software system with multifunction and...
Soccer robot control system is a closed-loop control system which consists of four components: visual subsystem, decision-making subsystem, wireless communication subsystem and robot vehicle subsystem. The system real-timely monitor the position and movement of the robost as well as the dynamic change of the environment, then make decision and set out instructions to drive the robots running to the...
With the development of science and technology, people pay more attention on the using of resource. As wood is a not inexhaustible resource, many researchers want to find advanced methods which can reduce the waste materials and enhance timber utilization rate. This paper studied the intelligent numerical control machine for wood processing. Firstly, the requirements of wood processing machine were...
Cutter radius compensation is the key technology in CNC system and is the data sources and basis of contour interpolation. It is the necessary premise to guarantee the part contour according to programming track and cutter radius to plan the tool center path, especially the coordinates of the joint points. The concept of orientation vector is introduced and a technology of 3D cutter radius compensation...
In this paper, the technology of the artificial neural network (ANN) is applied in the study on cutting force prediction of supercritical material milling. Base on the orthogonal milling experiments, three signals of the cutting force have been collected. The basis of this approach is to train and test the cutting force model. The inputs to the model consist of cutting velocity vc, feed rate fz and...
In order to improve the current precision of machining, a hydraulic micro-feed actuator for precision turning used in lathe or conventional CNC turning centers is introduced and the design formulas of important structure are given. The characteristics of the actuator such as displacement, natural frequency, cutting are researched by using the finite element analysis and experimental methods. The results...
In this paper a measure system for cutting force is described detail and used to measure cutting force on diamond mill when milling granite. The cutting forces in granite process is influenced significantly by cutting parameters such as rotational speed of spindle, feed rate, depth of cut. The cutting forces rise slowly after mill begins to contact granite then it will reach to a constant value. Cutting...
A simple method to create the toolpaths from bitmap picture of the workpiece for NC machine is described in this article. Halftone process is used to reproduce a continuous tone picture to binary tone picture for making a prototype picture. The obtained two dimensions picture with halftone process is employed to create the toolpaths of the sample workpiece. The workpiece dimension can be scaled to...
Arming at the characteristic of shrapnel multi-type and variable batch, developing tools Visual C++ 6.0 and Pro/Toolkit are used, the CNC system based on SmarTeam Data Model is put forward. Effective management and utilization are carried out which are in the fields of the processing parameter inquiring, experience inquiring and G code of numerical control cutting, milling, drilling, boring and so...
Generally, free-form surfaces are machined using the following procedures: by a CAM postprocessor a free-form surface is approximated into a number of smaller straight lines or curves to send a CNC system in the form of G/M code, which focuses on the constant speed of cutter location point instead of the constant speed of cutter contact point. These methods lead to low machining efficiency and accuracy...
In the machining, process parameters need to be monitored and adjusted automatically, which can improve production quality and reduce machining time. At present, it is mainly concentrated on the study of some algorithms about tool wearing and tool breakage, or theory modeling of interrelated models in the processing machining. The monitoring systems independent of CNC are also investigated to realize...
To improve production rates and the economic benefits, process parameters need to be monitored and adjusted automatically in the machining. At present, it is mainly concentrated on the study of the algorithms about tool wearing and tool breakage, and theory modeling of interrelated models in the processing machining. The monitoring systems independent of CNC are also investigated to realize the status...
A new machining method of line contact is proposed for raising the efficiency in processing surface. Through selecting and assigning to degree of freedom, a new motion mechanism is proposed, which makes that peripheral edges of a cutter are in line contact with the theoretical profile of a work-piece. It will be able to machine surface efficiently in line contact. The mechanism motion is analyzed...
A parametric surface directly interpolation method with a flat-end cutter has been presented in this paper. Distance between two adjacent CC paths has been calculated to facilitate the calculation of the increment of parameter. A CC path is interpolated to get a CC point, which is then transferred to CL data. Through adding post-process to the CNC system, the CL data is transformed into the control...
Wire communication network combining wireless communication, a hybrid network communication system applied in NC system is proposed. Operation mode of the upper computer combining the lower computer is adopted in NC system to create wire communication network. Many functions, including CAD, CAM, Graph automatic programming, cutter location calculating, NC code generation and so on, are achieved in...
This paper proposes a CAD/CAM/CNC architecture to automate saw blade stone cutting machines (disc stone cutting machines). The architecture is designed to give the controller the capacity of decision making as well as control of the machine tool, with the objective of being able to react to changes in the machining conditions, which is common in this kind technology. Adopting a similar paradigm as...
Five-axis complex surface machining on a computer numerically controlled (CNC) machine needs CAD/CAM system for the cutter location and orientation data. Since these data are defined with respect to the coordinate system of work-piece, they need to be converted to the machinepsilas control commands in machine coordinate system, through processing so called a CNC post-processing. In this work, a kinematic...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.