Technological assurance of the accuracy of cycloidal helical surfaces when processing them with a non-profiled tool on CNC machines

2020 ◽  
pp. 56-61
Author(s):  
A. A. Goncharov ◽  
Keyword(s):  
Tool Path ◽  
Mining Industry ◽  
Control Program ◽  
Automated System ◽  
Shape Accuracy ◽  
Cnc Machines ◽  
Additional Equipment ◽  
Screw Surface ◽  
Working Bodies ◽  
Machining Strategies

Modern designs of volumetric machines have parts containing complex-profile cycloidal screw surfaces as working bodies. The shaping of some types of this surfaces, such as the rotor surface of a conical singlescrew compressor, is possible only through the use of non-profiled tools and using specialized machining strategies. In view of the high prospects of using such structures in astronautics, robotics, medicine in the mining industry and metallurgy, there is an urgent problem of cycloidal helical surfaces accuracy during their processing on CNC machines. This work is devoted to the study of this problem. In the course of the study, a technological approach was chosen that provides control of the shape accuracy parameters when processing these surfaces, which consists in programmed feed control during processing. An analytical formalized algorithm for calculating the amount of feed change was integrated into an automated system for calculating the tool path, which made it possible to carry out experimental processing of a series of samples. The results of a metrological study of the accuracy of the shape of samples processed using a software-implemented technique for increasing the accuracy of the cross-section of cycloidal helical surfaces are presented. The efficiency of application of the proposed technique in the processing of miniature cycloidal helical surfaces is shown. Therefore, for the singlescrew micro-dispenser selected as a characteristic part of the rotor, it was possible to reduce the deviation from the circularity of the crosssectional profile of the cycloidal screw surface by more than three times. This demonstrates the possibility of increasing the accuracy of processing a complex-shaped surface by modifying the code of the control program without using additional equipment or more advance tools.

scholarly journals AUTOMATED SYSTEM OF PREVENTION OF EMERGENCY SITUATIONS IN A SLIDING SUPPORT OF A GAS PUMPING UNIT

2021 ◽  
pp. 67-69
Author(s):  
M. P. Kukhtik ◽  
A. I. Repnikov ◽  
Yu. P. Serdobintsev ◽  
M. A. Khaustov
Keyword(s):  
Block Diagram ◽  
Control Program ◽  
Automated System ◽  
Control Panel ◽  
Emergency Situations ◽  
Pumping Unit ◽  
Gas Pumping ◽  
Gas Pumping Unit ◽  
Operator Control

Block diagram and operation principle for automated system of prevention of emergency situations in a sliding support of a gas pumping unit have been developed. Control program has been written and HMI-interface of operator control panel has been developed.

scholarly journals Optimization of control program for CNC machines with regarding dynamic stability of cutting process and optimum modes of treatment in conditions of digital production

2018 ◽  
Vol 226 ◽  
pp. 04016
Author(s):  
Yuri G. Kabaldin ◽  
Dmitrii A. Shatagin ◽  
Pavel V. Kolchin
Keyword(s):  
Neural Network ◽  
Artificial Intelligence ◽  
Neural Networks ◽  
Dynamic Stability ◽  
Control Program ◽  
Cutting Process ◽  
Cnc Machines ◽  
Control Programs ◽  
Digital Production ◽  
Optimizing Control

The method for optimizing control programs for CNC machines based on artificial intelligence approaches, in particular, the apparatus of artificial neural networks, is outlined. A neural network model of the dynamic stability of the cutting process is proposed, which makes it possible to simulate the dynamics of the cutting process using the CAM system.

Numerical Control Programming System for Mill-Turn Machining

2015 ◽  
Vol 799-800 ◽  
pp. 1154-1157
Author(s):  
Chen Hua She ◽  
Jian Yu Lin ◽  
Shen Yung Lin
Keyword(s):  
Computer Aided Design ◽  
Tool Path ◽  
Geometric Model ◽  
Control Program ◽  
Simulation Software ◽  
Numerical Control ◽  
Programming System ◽  
Nc Program ◽  
Machining System ◽  
The Cost

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.

Tool Path Generation for 5-Axis Rough Cutting Using Haptic Device

2020 ◽  
Vol 14 (5) ◽  
pp. 808-815
Author(s):  
Koichi Morishige ◽  
Satoshi Mori ◽  
◽  
Keyword(s):  
Tool Path ◽  
Cutting Tool ◽  
Control Program ◽  
Target Object ◽  
Tool Path Generation ◽  
Haptic Device ◽  
Numerical Control ◽  
Path Generation ◽  
Haptic Devices ◽  
Tool Paths

CAM software is generally used to generate tool paths for 5-axis controlled machining. However, adjusting its several parameters and settings is difficult. We propose a system for tool path generation to be applied to 5-axis controlled machining. The system allows machining movements to be established by manipulating haptic devices in a virtual environment. Therefore, the cutter location for 5-axis machining can be easily controlled by operating a virtual cutting tool. The contact between the cutting tool and the target shape is reflected to the user through the haptic device. The generated path can be converted into a numerical control program for the actual machining of the target object. We detail the implementation of the proposed interface using two haptic devices and a method of tool path generation that improves rough cutting by smoothing the generated cutting points and simplifying the tool postures. The effectiveness of the developed system is confirmed through machining simulations.

Geometric Model for Generation of Contour- Parallel Lines’ Family for Cutting Tool’s Path Automated Computation

2019 ◽  
Vol 7 (1) ◽  
pp. 3-13 ◽  
Author(s):  
К. Панчук ◽  
K. Panchuk ◽  
Т. Мясоедова ◽  
T. Myasoedova ◽  
И. Крысова ◽  
...  
Keyword(s):  
Analytical Solution ◽  
Computer Aided Design ◽  
Tool Path ◽  
Geometric Model ◽  
Cutting Tools ◽  
Algebraic Models ◽  
Cnc Machines ◽  
Multiply Connected ◽  
Parallel Lines ◽  
Polygonal Region

In this paper has been proposed a geometric model for forming problem of contour-parallel lines (equidistant lines) for a flat contour with an island, and has been obtained the problem’s analytical solution, which is relevant for computer-aided design of cutting tools processing pocket surfaces on CNC machines. The proposed geometric model is based on cyclograph mapping of space on a plane. Beyond the analytical solution the geometric model differs from the known algebraic models and their solutions for considered forming problem also by the fact that it allows obtain a more complete and evident representation on the relationship and interaction for all its geometric components at the stages of 3D computer visualization. A 3D geometric model based on a cyclograph mapping of space has been proposed for obtaining the families of equidistant lines for connected and multiply connected regions with closed contours taken as a basis for pocket surfaces modeling. An algorithm for the analytical solution of the problem related to equidistant families generation is getting from the geometric model. All stages of the analytical solution are accompanied by a figurative representation of geometric objects and their relations in the geometric model’s virtual electronic space. The proposed in this paper algorithm for the case of a doubly connected polygonal region can be used as a basis for generation of equidistant families for multiply connected polygonal regions. The presence of the analytical solution for the problem related to equidistant families generation simplifies greatly the automated calculation of the tool path and preparation of control programs for pocket surfaces manufacturing on CNC machines. Have been presented an example and algorithm providing support for working capacity of the proposed geometric model for considered forming problem.

Influence of Machining Strategies on Surface Roughness in Ball End Milling of Inclined Surfaces

2012 ◽  
Vol 488-489 ◽  
pp. 836-840 ◽  
Author(s):  
S. Shajari ◽  
M.H. Sadeghi ◽  
H. Hassanpour ◽  
B. Jabbaripour
Keyword(s):  
Surface Roughness ◽  
Tool Path ◽  
End Milling ◽  
Cutting Speed ◽  
Machining Parameters ◽  
Scallop Height ◽  
Inclined Surfaces ◽  
Milling Operation ◽  
Variable Surface ◽  
Machining Strategies

Inclined surfaces are commonly used in the aerospace and die/mold industries. For machining this kind of surfaces, many aspects have to be considered as machinability considerations including milling strategies, machining parameters and etc. In machining, achieving better quality is challenging task. Various tool-path strategies during milling operation leads to variable surface roughness on machined samples. The objective of this study is to analyze different machining strategies in 3-axis milling of a typical curved geometry part. The machining parameters used in this study, are cutting speed, feedrate and stepover. This paper also presents an approach to develop a mathematical model for measuring Scallop height size and distribution for different machining strategies to show that Scallop height size has direct relation with Surface roughness measurements in each strategy. Finally the optimized strategy based on the results was determined.

scholarly journals RESULTS OF THE PRODUCTION INSPECTION OF THE AUTOMATIC MILK WASHING LINE OF MILKING INSTALLATIONS

2021 ◽  
pp. 78-87
Author(s):  
Ihor Babyn
Keyword(s):  
Energy Consumption ◽  
Automated System ◽  
Christmas Tree ◽  
Technological Support ◽  
Anaerobic Microorganisms ◽  
Additional Equipment ◽  
Automatic Milking ◽  
Quality Of Milk ◽  
Definition Of ◽  
Production Inspection

Creation of automated technical and technological support of the system of washing milking installations, which intensifies the process without additional costs, becomes of paramount importance in solving the problem of improving the quality of milk. The purpose of the research is to conduct a production inspection of the developed automated system for flushing milk lines of milking parlors. On the basis of the received mathematical models of process of work of washing of milking installations with air and hydro-injectors, and also the photodetector of definition of pollution of the milk line of the milking parlor the automatic system of its washing is developed. energy consumption. As a result of industrial inspection of automatic milking line washing systems, it was found that the lowest value of microbiological contamination of milk (number of mesophilic aerobic and facultative-anaerobic microorganisms) is observed for the variant with adaptive washing duration and adaptive mode of air injectors. For UDE-16 the Christmas tree makes 82 thousand CFU/cm3 (extra grade of milk), and for UDM-100 "Bratslavchanka" – 248 thousand CFU/cm3 (the highest grade of milk). As a result of production inspection of the automatic milking line washing system of milking installations, it was found that the lowest values of water consumption are observed for the variant with the shortest washing duration (5 min/10 min/ 5 min) For UDE-16 the Christmas tree makes 185 l, and for UDM-100 "Bratslavchanka" – 268 l. The lowest value of energy consumption is observed for the basic version of the flushing system (without additional equipment). For UDE-16 the Christmas tree makes 13,5 kWh, and for UDM-100 "Bratslavchanka" – 21,4 kWh.

scholarly journals Shape Accuracy Improvement Obtained by μ-SPIF by Tool Path Compensation

2020 ◽  
Vol 47 ◽  
pp. 1399-1402
Author(s):  
Bonnardot Cédric ◽  
Malécot Pierrick ◽  
Thibaud Sébastien
Keyword(s):  
Tool Path ◽  
Accuracy Improvement ◽  
Shape Accuracy

Virtual Manufacturing of Straight Bevel Gear Based on Pro/E Wildfire

2014 ◽  
Vol 1044-1045 ◽  
pp. 902-905
Author(s):  
Ji Shun Lin
Keyword(s):  
Tool Path ◽  
Control Program ◽  
Virtual Manufacturing ◽  
Numerical Control ◽  
Milling Machine ◽  
Post Processing ◽  
Milling Cutter ◽  
Straight Bevel Gear ◽  
Nc Milling ◽  
Finishing Machining

Making use of function of NC programme provided by Pro/NC, aiming at general NC milling machine and using general milling cutter, this thesis attempts to establish the tool path of straight bevel gear’s finishing machining and then put forward the idea of processing piece by piece. In this way, “over cutting” and “short cutting” can be avoided and the precision of process can be improved. Finally, the accuracy of product designing and manufacture can be tested by post-processing of numerical control program of straight bevel gear’s finishing processing with the VERICUT’s simulating.

Sign in / Sign up

Export Citation Format

Share Document