scholarly journals The CNC Machining Process Design and Programming of the Drive Shaft

2017 ◽  
Vol 10 (1) ◽  
pp. 347-354
Author(s):  
Zhu Xiurong ◽  
Zhang Xin ◽  
Liu Yang ◽  
Sun Zhijie
Keyword(s):  
Process Design ◽  
Drive Shaft ◽  
Cnc Machining ◽  
Machining Process

Modeling of Self-Induced Vibrations that Occur During the Machining Process of Casting Patterns with the Use of The Fuzzy-Neural Networks Method

2013 ◽  
Vol 58 (3) ◽  
pp. 871-875
Author(s):  
A. Herberg
Keyword(s):  
Neural Networks ◽  
Control System ◽  
Network Structure ◽  
Fuzzy Systems ◽  
Fuzzy Neural Networks ◽  
Cnc Machining ◽  
Machining Process ◽  
Modeling Process ◽  
Fuzzy Neural ◽  
Takagi Sugeno

Abstract This article outlines a methodology of modeling self-induced vibrations that occur in the course of machining of metal objects, i.e. when shaping casting patterns on CNC machining centers. The modeling process presented here is based on an algorithm that makes use of local model fuzzy-neural networks. The algorithm falls back on the advantages of fuzzy systems with Takagi-Sugeno-Kanga (TSK) consequences and neural networks with auxiliary modules that help optimize and shorten the time needed to identify the best possible network structure. The modeling of self-induced vibrations allows analyzing how the vibrations come into being. This in turn makes it possible to develop effective ways of eliminating these vibrations and, ultimately, designing a practical control system that would dispose of the vibrations altogether.

Chatter Prediction Based on NC Physical Simulation in Machining Ti6Al4V Thin-Walled Components

2013 ◽  
Vol 395-396 ◽  
pp. 1008-1014
Author(s):  
Yu Li ◽  
Chao Sun
Keyword(s):  
Tool Path ◽  
Physical Simulation ◽  
Prediction Method ◽  
Cutting Parameters ◽  
Simulation Software ◽  
Cnc Machining ◽  
Machining Process ◽  
Chatter Stability ◽  
Chatter Prediction ◽  
Thin Walled

Chatter has been a problem in CNC machining process especially during machining thin-walled components with low stiffness. For accurately predicting chatter stability in machining Ti6Al4V thin-walled components, this paper establishes a chatter prediction method considering of cutting parameters and tool path. The fast chatter prediction method for thin-walled components is based on physical simulation software. Cutting parameters and tool path is achieved through the chatter stability lobes test and finite element simulation. Machining process is simulated by the physical simulation software using generated NC code. This proposed method transforms the NC physical simulation toward the practical methodology for the stability prediction over the multi-pocket structure milling.

The Effect of Prior Cutting Conditions on the Shear Mechanics of Orthogonal Machining

1998 ◽  
Vol 120 (1) ◽  
pp. 13-20 ◽  
Author(s):  
R. Stevenson ◽  
D. A. Stephenson
Keyword(s):  
Material Properties ◽  
Metal Cutting ◽  
Orthogonal Cutting ◽  
Rake Angle ◽  
Cnc Machining ◽  
Machining Process ◽  
Depth Of Cut ◽  
Prior History ◽  
Machining Conditions ◽  
The Difference

It has been proposed several times in the metal-cutting literature that the machining process is non-unique and that the instantaneous machining conditions depend on the prior machining conditions (e.g. depth of cut, rake angle etc.). To evaluate the validity of this concept, a series of experiments was conducted using a highly accurate CNC machining center. For these experiments, the machining conditions were changed during the course of an orthogonal cutting experiment in a repeatable manner and the measured forces compared as a function of prior history. Tests were conducted on several tempers of 1100 aluminum and commercial purity zinc to evaluate the effect of material properties on the machining response. It was found that the change in measured cutting forces which could be ascribed to prior machining history was less than 3 percent and that material properties, particularly work hardening response, had no discernible effect on the magnitude of the difference.

Silicon Carbide Ceramic Turning Process Design and Parameter Analysis

2014 ◽  
Vol 800-801 ◽  
pp. 203-207
Author(s):  
Zhen Bo Wang ◽  
Liang Zhang ◽  
Shu Zhi Li
Keyword(s):  
Silicon Carbide ◽  
Process Design ◽  
Numerical Control ◽  
Parameter Analysis ◽  
Machining Process ◽  
Analysis Method ◽  
Single Factor ◽  
Turning Process ◽  
Silicon Carbide Ceramic ◽  
Single Factor Analysis

This article mainly aims at the problem of silicon carbide ceramic mechanical turning difficult processing,by adopting the method of the numerical control turning processing.Design a special fixtures and a NC machining process to accomplish the manufacture of silicon carbide plate.And through the single factor analysis method to process parameters were analyzed.

Incorporation of Manufacturing Process Design Into the Senior Capstone Design Course

2011 ◽  
Author(s):  
Douglas V. Gallagher ◽  
Ronald A. L. Rorrer
Keyword(s):  
Process Design ◽  
Manufacturing Process ◽  
Engineering Students ◽  
Cnc Machining ◽  
Senior Design ◽  
Solid Models ◽  
Hands On ◽  
Design Projects ◽  
The University ◽  
Capstone Design

At the University Colorado Denver, a manufacturing process design course was specifically created to raise the level of the as constructed senior design projects in the department. The manufacturing process design course creates a feed forward loop into the senior design course, while the senior design course generates a feedback loop into the process design course. Every student and student project has the opportunity to utilize CNC mills and lathes where appropriate. Specific emphasis is placed upon the interfaces from solid models to CAM models and subsequently the interface from CAM models to the machine tool. Often the construction of many senior design projects approaches the level of blacksmithing due to time constraints and lack of fabrication background. Obviously, most engineering students have neither the time nor the ability to become expert fabricators. However, the wide incorporation of CNC machining in the program allows, an opportunity to not only raise the quality of their prototypes, but also to immerse in the hands on experience of living with the ramifications of their own design decisions in manufacturing. Additionally, some of the art of fabrication is turned into the science of fabrication. The focus of this paper will be primarily on examining the effect of formal incorporation of the manufacturing process in the capstone design course.

Synchronous Adjustment of Milling Tool Path Based on the Relative Deviation

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
Xiao-Jin Wan ◽  
Cai-Hua Xiong ◽  
Lin Hua
Keyword(s):  
Tool Path ◽  
Cutting Tool ◽  
Cnc Machining ◽  
Numerical Control ◽  
Machining Process ◽  
Machining Accuracy ◽  
Source File ◽  
Modern Computer ◽  
Adjustment Strategy ◽  
Machining System

In machining process, machining accuracy of part mainly depends on the position and orientation of the cutting tool with respect to the workpiece which is influenced by errors of machine tools and cutter-workpiece-fixture system. A systematic modeling method is presented to integrate the two types of error sources into the deviation of the cutting tool relative to the workpiece which determines the accuracy of the machining system. For the purpose of minimizing the machining error, an adjustment strategy of tool path is proposed on the basis of the generation principle of the cutter location source file (CLSF) in modern computer aided manufacturing (CAM) system by means of the prediction deviation, namely, the deviation of the cutting tool relative to the workpiece in computer numerical control (CNC) machining operation. The resulting errors are introduced as adjustment values to adjust the nominal tool path points from cutter location source file from commercial CAM system prior to machining. Finally, this paper demonstrates the effectiveness of the prediction model and the adjustment technique by two study cases.

Research on Machining Simulation of Ultra High-Speed Grinding Machine Tool Based on Web

2010 ◽  
Vol 126-128 ◽  
pp. 77-81
Author(s):  
Wan Shan Wang ◽  
Peng Guan ◽  
Tian Biao Yu
Keyword(s):  
Machine Tool ◽  
Geometric Modeling ◽  
High Speed ◽  
Cnc Machining ◽  
Machining Process ◽  
Machining Simulation ◽  
Ultra High Speed ◽  
Cad Cam ◽  
High Speed Grinding ◽  
Grinding Machine

The future development of the manufacturing is using VR technology to make the machining simulation before the actual machining process made. The machining simulation of Ultra High-speed Grinding Machine Tool is researched in this paper. Firstly, using UG/NX software and VRML, the geometric modeling of machine tool is modeled. Secondly, through using Java and Javascript language, the operation and display of machining process of ultra high-speed grinding are realized. The main technologies include NC codes compiling, collision detection and material removal. Thirdly, the example of machining simulation using virtual ultra high-speed grinding machine tool can be obtained in the paper. Compared to other CNC machining simulation methods, the method in the paper has reality display, rich features, a good man-machine interaction, etc., and it does not rely on expensive CAD/CAM software. The system files generated by the machining simulation have the small size and can be transferred on the network easily.

Research on a New Model of MBD-Based Machining Process Design

2011 ◽  
Vol 121-126 ◽  
pp. 1058-1062
Author(s):  
Neng Wan ◽  
Yang Yang
Keyword(s):  
Process Design ◽  
Geometric Modeling ◽  
Process Model ◽  
Process Management ◽  
Field Application ◽  
Machining Process ◽  
Data Conversion ◽  
Data Link ◽  
Process Ontology ◽  
New Model

In order to change the incompleteness of data link, tediousness of data conversion and unclearness of process expression in the traditional two-dimensional machining process design, this paper researches on a new model of MBD-based one. The author proposes the 3Dprocess model as the carrier to manufacture information, and establishes closed loop architecture composed of 3D machining process design, 3D process management and feedback of field application of 3Dmachining process. The author then analyzes the composition elements of machining process model under the condition of MBD, proposes the establishment of machining process ontology and geometric modeling ontology, and achieves the conversion between these two. This paper researches on the composition of MBD machining process card, establishes the mapping relation between process expression elements and process card elements in the 3Dmachining process model, and ultimately realizes the machining process design in the 3Denvironment.

Application of Semi Automatic Model of Product Complexity Index Calculation by Identification and Recognition of Geometric Features Information

2014 ◽  
Vol 493 ◽  
pp. 576-582
Author(s):  
Hendri D.S. Budiono ◽  
Mochammad Sholeh ◽  
Gandjar Kiswanto ◽  
Tresna P. Soemardi
Keyword(s):  
Design Process ◽  
Process Design ◽  
Mechanical Design ◽  
Continuous Process ◽  
Machining Process ◽  
Product Complexity ◽  
Machining Processes ◽  
Industrial Facilities ◽  
Car Sales ◽  
The Government

It is a phenomenon that an experience mechanical/ design engineer with years of experience in mechanical parts design, still must to improve the knowledge about process design. This phenomenon will be different with other fields but common in process design because design is continuous process. The automotive industry is expected to be one of the driving factors for economic growth in Indonesia in 2025. It is shown by research firm (Frost & Sullivan) that estimates this year's car sales in Indonesia will rise moderately by 6.5% from a year earlier to 948,500 units and the real car sales in Indonesia rose to 43% in April 2012. Development should be increased because the government provides to industrial facilities that conduct research, development and innovation. Therefore the design process until production is expected to be rapid and immediate product can be enjoyed by society. To speed up the production process, the design process should be faster, and account how the next process that is the production. This research useds the form of the usual features carried with three machining processes are widely used in the world of mechanical component industries. The processes are turning (around 24.9% of machining process), milling (around 20.2% of machining process) and drilling (around 28.2% of machining process). The overall mean of the three processes around 73.3% of the portion of the machining process (survey conducted by PERA).

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