scholarly journals Complex surface finishing control on NC milling machines

2018 ◽  
Vol 2018 (4) ◽  
pp. 29-37
Author(s):  
Александр Козлов ◽  
Aleksandr Kozlov ◽  
Геннадий Малютин ◽  
Genadyi Malyutin
Keyword(s):  
Contact Area ◽  
Cutting Forces ◽  
Ball Mill ◽  
Complex Surface ◽  
Surface Finishing ◽  
Technological Parameters ◽  
Milling Machines ◽  
Nc Milling

On the basis of the analysis of cutting forces operating in the contact area of a ball mill with the surface under machining there are offered dependences for the technological parameters definition. The use of the dependences obtained allows increasing productivity of volumetric milling areas left unprocessed after semifinish milling without use of additional adaptive devices

Methodic of Rational Cutting Conditions Determination for 3-D Shaped Detail Milling Based on the Process Numerical Simulation

2014 ◽  
Author(s):  
Igor Kiselev ◽  
Sergey Voronov
Keyword(s):  
Cutting Forces ◽  
Complex Geometry ◽  
Chip Thickness ◽  
Cutting Conditions ◽  
Dynamical Model ◽  
Processing Route ◽  
Technological Parameters ◽  
Machined Surface ◽  
Geometry Modeling ◽  
Milling Dynamics

The paper is devoted for the analysis of the dynamics effect on the 5-axis milling process of flexible details. The integrated model of milling dynamics composed by block principle in the paper is presented. The model consist of: 1) dynamical model of tool; 2) dynamical model of machined detail based on Finite Element Method (FEM); 3) phenomenological model of cutting forces and 4) algorithm of geometry modeling for instant machined chip thickness calculation. Regeneration mechanism of cutting and calculation of the machined surface are into this algorithm embedded. The elaborated model is adapted for 5-axis processing of the profiled details with 3-D complex geometry. Alteration of workpiece dynamic characteristics while the allowance removal is considered by the special algorithm of FEM grid changing based on the results of cutting geometry modeling. The results of modeling give us opportunity determine cutting forces, estimate the machined surface quality, calculate the magnitude and the character of tool and detail vibrations under the specified cutting conditions. The conception of increasing the process quality and the machinability for 3-D shaped details machining is offered in the paper. Applying the specified efficient conditions the undesired dynamical effects can be excluded on the base of the results of multi-variant simulation for milling dynamics varying the technological parameters at the different region of the processing route.

Ultrasonic Welding by Pressing into Constant and Variable Gaps in Rigid Plastic Products

2019 ◽  
pp. 46-53
Author(s):  
S.S. Volkov ◽  
V.M. Nerovnyy ◽  
G.A. Bigus
Keyword(s):  
Contact Area ◽  
Welded Joints ◽  
Ultrasonic Welding ◽  
Technological Parameters ◽  
Rigid Plastic ◽  
Welded Seam ◽  
Edge Preparation ◽  
Plastic Products

A technique and a tool for ultrasonic welding by pressing a connecting element into a constant gap is proposed. The welded joints of plates arranged parallel to each other prove to be consistent in terms of strength and transparency. It is established that the coefficient of concentration of energy released per unit of volume of the parts being welded greatly depends on the contact area between them. When designing a welded seam, it is necessary to ensure edge preparation to reduce the contact area between the welded parts. In the case of a V-shaped protrusion in the design, the angle at its top should be approaching 90. The optimal technological parameters for ultrasonic welding by pressing into a constant gap are determined.

Goodness Indicator and Technological Optimization of Honing

2013 ◽  
Vol 581 ◽  
pp. 261-265 ◽  
Author(s):  
Ottó Szabó
Keyword(s):  
Material Removal ◽  
Removal Rate ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Complex Surface ◽  
Technology Planning ◽  
Technological Parameters ◽  
Machining Processes ◽  
Important Field ◽  
Abrasive Cutting

Optimisation of technological processes is an important field of research of machining processes. Honing process, its aim and results are affected more factors. Effectiveness is expressed by the following parameters: accuracy, surface roughness, complex surface quality (integrity),material removal rate, costs and productivity of the process. Developed method helps the technology planning and with the introduced new goodness indicator, investigates and corrects it. Optimization and minimization of costs can be ensured at given technological circumstances and technological parameters. With adjustment of the pressure (p) and the cutting speed (vc) economy of the process can be increased in the factory. Developed method can be applied for machining by other abrasive cutting tools. The paper summarizes new results of this theoretical and experimental research.

Research of the Technological Parameters Influencing on the Surface Quality of Micro Complex Surface

2005 ◽  
Vol 291-292 ◽  
pp. 513-518 ◽  
Author(s):  
Ming Jun Chen ◽  
Ying Chun Liang ◽  
Ya Zhou Sun ◽  
W.X. Guo ◽  
Wen Jun Zong
Keyword(s):  
Machine Tool ◽  
Three Dimensional ◽  
Complex Surface ◽  
Cutting Parameters ◽  
Numerical Control ◽  
Tool Geometry ◽  
Machining Accuracy ◽  
Technological Parameters ◽  
Machined Surface ◽  
Machining Errors

In order to machine complex free surface parts, a micro NC (numerical control) three-dimensional machine tool is developed, integrated the PMAC control. Based on this NC machine tool, the influencing of the technological and tool’s parameters on machining accuracy of micro complex surface parts are analyzed, and the cause to lead to the machining errors is explained. Therefore, the cutting parameters and tool geometry parameters to machine micro complex surface, such as the human’s face, can be selected optimally. Finally, the micro complex human’s face is machined on this developed micro machine tool under optimal parameters. The experimental results show that the machined surface is smooth and continuous. The machined quality is satisfied.

scholarly journals Cutting Force Modeling and Optimization in 3D Plane Surface Machining

1999 ◽  
Author(s):  
Hsi-Yung (Steve) Feng ◽  
Ning Su
Keyword(s):  
Cutting Force ◽  
Cutting Forces ◽  
End Milling ◽  
Plane Surface ◽  
Mechanistic Modeling ◽  
Surface Finishing ◽  
Force Model ◽  
Cutting Force Model ◽  
Ball End Milling ◽  
Finishing Machining

Abstract The prediction and optimization of cutting forces in the finishing machining of 3D plane surfaces using ball-end milling are presented in this paper. The cutting force model is developed based on the mechanistic modeling approach. This improved model is able to accurately predict the cutting forces for non-horizontal and cross-feed cutter movements typical in 3D finishing ball-end milling. Optimization of the cutting forces is used to determine both the tool path and the maximum feed rate in 3D plane surface finishing machining. The objective is to achieve highest machining efficiency and to ensure product quality. Experimental results have shown that the cutting force model gives excellent predictions of cutting forces in 3D finishing ball-end milling. The feasibility of the integrated process planning method has been demonstrated through the establishment of optimized process plans for the finishing machining of 3D plane surfaces.

Strategy and Application of Modeling and NC Machining for Rotary Parts of Complex Curved Surface

2012 ◽  
Vol 184-185 ◽  
pp. 477-481
Author(s):  
Wei Hong Liu ◽  
Hai Bo Liu
Keyword(s):  
Ball Mill ◽  
Nc Machining ◽  
Curved Surface ◽  
Production Cycle ◽  
Milling Machine ◽  
End Mill ◽  
Rough Machining ◽  
Operation Rate ◽  
Nc Milling ◽  
Rotary Parts

Aimed at the difficulty of rotary parts of complex curved surface in modeling and NC machining, making full use of advanced modern molding technology of Solidworks and powerful NC machining skill of Mastercam, the paper introduced a strategy , segmented milling that a true part was step to step machined by end mill not ball mill on 3 Axes NC milling machine but 4 Axes during rough machining. According to the method, it can raise the operation rate and shorten production cycle.

Effect of surface finishing on the elastic contact area evaluation of austempered ductile iron

2012 ◽  
Vol 25 (2) ◽  
pp. 101-109 ◽  
Author(s):  
Giuseppe Pintaude ◽  
Cristiano Brunetti ◽  
Mario V. Leite ◽  
Luis F. Montanez-Calao
Keyword(s):  
Contact Area ◽  
Ductile Iron ◽  
Austempered Ductile Iron ◽  
Surface Finishing ◽  
Elastic Contact ◽  
Effect Of Surface
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