scholarly journals Quality of cylindrical surfaces at processing in driver machine-tool adaptations

2018 ◽  
Vol 4 (1) ◽  
pp. 9-13
Author(s):  
V.V. Erokhin ◽  
Keyword(s):  
Machine Tool

Vibration Analysis of Radial Drilling Machine Structure Using Finite Element Method

2012 ◽  
Vol 472-475 ◽  
pp. 2717-2721 ◽  
Author(s):  
Rajiv Kumar ◽  
Mohinder Pal Garg ◽  
Rakesh C. Sharma
Keyword(s):  
Machine Tool ◽  
Natural Frequency ◽  
Mode Shapes ◽  
Drilling Machine ◽  
Element Analysis ◽  
Stiffness Matrices ◽  
Machine Tool Structure ◽  
Radial Drilling ◽  
Machine Structure

Manufacturing industries now a days have stringent expectation from the machine tools in terms of productivity as well as quality of products.Vibration plays an important role in determining the quality of product.If the pattern of vibration prevailing in the machine tool during cutting is known,then machine tool structure can be designed in such a way so that natural frequency of machine tool structure can be isolated from the forced frequency.So, this study is focused on finding the natural frequency and mode shapes of radial drilling machine structure.Finite element analysis has been done to find out the natural frequencies and mode shapes of radial drilling machine structure.Assembled mass and stiffness matrices are obtained for each element and solved by using inverse iteration technique.

Fuzzy Synthesized Evaluation of Product Quality of Machine Tool Based on Harmonious Design Method

2009 ◽  
Vol 16-19 ◽  
pp. 1382-1386
Author(s):  
Chun Shi Liu ◽  
Xiao Peng Li ◽  
Wei Sun ◽  
Yi Min Zhang
Keyword(s):  
Machine Tool ◽  
Product Quality ◽  
Evaluation Method ◽  
Design Method ◽  
Price Ratio ◽  
Design Quality ◽  
Product Function ◽  
Working Capability ◽  
One Machine

In this work, it is presented and studied that the harmonious of product function with capability, harmonious of product with product, harmonious of product with people, with technology, with society environment, with entironment from the view of entironment, society, economy, science, politics, culture and legal point in the design process. And the quality verification and evaluation methods are studied to enhance the design quality more effectively. And that, all the studied contents is named harmonious design method. One machine tool is used as an example to explain the method with design quality evaluated by fuzzy synthesized evaluation method from function, structure capability, working capability and craftwork capability factors. The grade and disparity of design quality are obtained through the evaluation results, then design project could be modified based on it, and it is very useful to improve product quality and to enhance performance-price ratio and market competitive ability.

Machine Integrated Measurement of Ultra Precision Machined Specular Non-Rotational Symmetrical Surfaces

2014 ◽  
Vol 907 ◽  
pp. 277-289 ◽  
Author(s):  
Eckart Uhlmann ◽  
Gerhard Häusler ◽  
Christian Röttinger ◽  
Evelyn Olesch ◽  
Christian Faber ◽  
...  
Keyword(s):  
Machine Tool ◽  
Optical Measurement ◽  
Installation Space ◽  
Precision Machining ◽  
Test Surface ◽  
Full Field ◽  
Rotationally Symmetric ◽  
Ultra Precision ◽  
Height Data

In this paper, current results of a research project combining ultra precision machining and optical measurement are presented. The goal is to improve the quality of specular freeform surfaces manufactured by ultra precision slow slide servo turning by running appropriate correction cycles on the basis of machine integrated measurements. These measurements are conducted using the principle of Phase Measuring Deflectometry (PMD) in order to optically acquire full-field 3D-height data. For this purpose, a special setup the so called Mini PMD that can be operated within the limited installation space of an ultra precision machine tool has been designed and implemented. Results of machine integrated measurements of a specular non-rotational symmetrical surface are presented. Furthermore, using Mini PMD and a rotationally symmetric test surface, a complete correction cycle is demonstrated without the necessity of taking the workpiece off the machine for measurement.

The Single-Abrasive Coupled Flutter Model in Power Ultrasonic Honing

2015 ◽  
Vol 775 ◽  
pp. 19-22
Author(s):  
Xiao Qiang Zhang ◽  
Xi Jing Zhu ◽  
Hai Zhen Geng ◽  
Jian Qing Wang ◽  
Quan Cheng ◽  
...  
Keyword(s):  
Nonlinear System ◽  
Machine Tool ◽  
Differential Expression ◽  
Theoretical Basis ◽  
Degrees Of Freedom ◽  
Processing Quality ◽  
Excited Vibration ◽  
Power Ultrasonic ◽  
Research Objects

Flutter, a dynamic and severe self-excited vibration, easily produced in power ultrasonic honing, is one of the important factors, which affects the processing quality of the workpiece, the efficiency of the machine tool. Based on the study of power ultrasonic honing mechanism, choosing single abrasive and workpiece as research objects, respectively establishe the physical and mathematical coupled flutter model of power ultrasonic honing nonlinear system, with two degrees of freedom, determine the differential expression of the model, and simulate the boundry of flutter condition. It is proved flutter is produced in ultrasonic vibration honing, then the way is proposed to restrain. The study provide a theoretical basis for deeply seeking the strategy to repress and eliminate the flutter.

Automatische HiLS-Generierung für komplexe Maschinen*/Automated creation of HiLS of complex machine tools

2016 ◽  
Vol 106 (07-08) ◽  
pp. 501-505
Author(s):  
S. Scheifele ◽  
A. Prof. Verl
Keyword(s):  
Machine Tool ◽  
Control Systems ◽  
Software Quality ◽  
Machine Tools ◽  
Hardware In The Loop ◽  
Automated Generation ◽  
Quality Of Control

Die Hardware-in-the-Loop-Simulation (HiLS) von Maschinen und Anlagen wird eingesetzt, um die Zeiten zur Herstellung einer Maschine zu verkürzen und die Softwarequalität der Steuerung zu erhöhen. Inzwischen spielt sie auch bei der Projektierung und der Konzeptüberprüfung eine immer größere Rolle. Der Fachbeitrag zeigt auf, mit welchen Methoden der Modellierung wiederverwendbare Modelle geschaffen und so automatisch HiLS generiert werden können.   The hardware-in-the-loop simulation (HiLS) of machinery and equipment is used to reduce the time needed for producing a machine tool and to enhance the software quality of control systems. Today HiLS also plays an important role for commissioning machine tools and for the concept verification. This paper points out which methods can be used for the modeling of reusable models and, thus, how an automated generation of a HiLS can be realized.

scholarly journals Decomposition of milling operation

2018 ◽  
Vol 224 ◽  
pp. 01136
Author(s):  
Yurij Novoselov ◽  
Mariya Piankovskaya ◽  
Vladimir Bogutsky
Keyword(s):  
Machine Tool ◽  
Contact Zone ◽  
Block Diagram ◽  
Quality Parameters ◽  
Machining Process ◽  
Milling Operation ◽  
The Stability ◽  
Main Components ◽  
The Relationship

The article deals with the problem of improving the stability of quality parameters in the milling of molds, which provides for minimizing deviations from the set values that meet the requirements of the product drawing. For this purpose, a block diagram of the milling operation was developed and decomposition was carried out, which allowed to identify such subsystems, “workpiece”, “machine — tool”, “tool”, “contact zone”. The factors that lead to a decrease in the parameters of the quality of the surfaces of the workpiece are determined. The developed block diagram allowed to establish the relationship between the main components of the technological system and the characteristics of the machining process.

Track Smoothness of Moving Axis Considering Kinematical Characteristics of Machine Tool

2013 ◽  
Vol 819 ◽  
pp. 120-124
Author(s):  
Yong Lin Cai ◽  
Zhi Min Yang ◽  
Jian Yong Li ◽  
Chao Huang
Keyword(s):  
Machine Tool ◽  
Integration Method ◽  
Numerical Control ◽  
Displacement Curve ◽  
Numerical Control Machining ◽  
Machining Quality ◽  
Complex Part ◽  
Part Surface ◽  
High Feed

In multi-axis NC (Numerical Control) machining for a complex part, high feed rate may bring shock to moving axes and influence the machining quality of the part. Firstly, velocity, acceleration and jerk kinematical characteristics are worked out according to the displacement curve of a moving axis. Secondly, the acceleration curve segments which need to be smoothed are found out according to the value of jerk, and these segments are smoothed with B-spline method. Then the smoothed velocity and displacement can be calculated through numerical integration method to get the new displacement curve of the moving axis. Finally, a test example is given to demonstrate the promising use of the proposed solution. The method presented by this paper can effectively decrease the acceleration shock of machine tool and improve the machining quality of part surface.

scholarly journals Spindle Error Movements and Their Measurement

2021 ◽  
Vol 11 (10) ◽  
pp. 4571
Author(s):  
Jarosław Chrzanowski ◽  
Tadeusz Sałaciński ◽  
Paweł Skiba
Keyword(s):  
Machine Tool ◽  
Research Methods ◽  
Machine Tools ◽  
Research Work ◽  
Current State ◽  
Cutting Machine ◽  
The Impact

The spindle of a machine tool is an important component of the machine. Its condition affects not only operation of the machine tool but also, above all, the quality of the workpiece. This paper explains the terminology and describes the research methods used to measure the spindle error movements of cutting machine tools. This article explains the impact of spindle motion inaccuracies on the quality of workpieces, quotes the requirements of European and American standards, and describes the current state and directions of development of the presented methods. Our own research work in this field is also presented.

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