scholarly journals Modeling and Simulation of Process-Machine Interaction in Grinding of Cemented Carbide Indexable Inserts

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Wei Feng ◽  
Bin Yao ◽  
BinQiang Chen ◽  
DongSheng Zhang ◽  
XiangLei Zhang ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Dynamic Instability ◽  
Process Models ◽  
Cemented Carbide ◽  
Machining Process ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Machine Model ◽  
Machine Interaction ◽  
Process Machine Interaction

Interaction of process and machine in grinding of hard and brittle materials such as cemented carbide may cause dynamic instability of the machining process resulting in machining errors and a decrease in productivity. Commonly, the process and machine tools were dealt with separately, which does not take into consideration the mutual interaction between the two subsystems and thus cannot represent the real cutting operations. This paper proposes a method of modeling and simulation to understand well the process-machine interaction in grinding process of cemented carbide indexable inserts. First, a virtual grinding wheel model is built by considering the random nature of abrasive grains and a kinematic-geometrical simulation is adopted to describe the grinding process. Then, a wheel-spindle model is simulated by means of the finite element method to represent the machine structure. The characteristic equation of the closed-loop dynamic grinding system is derived to provide a mathematic description of the process-machine interaction. Furthermore, a coupling simulation of grinding wheel-spindle deformations and grinding process force by combining both the process and machine model is developed to investigate the interaction between process and machine. This paper provides an integrated grinding model combining the machine and process models, which can be used to predict process-machine interactions in grinding process.

Prozess-Maschine-Interaktion des Verzahnungshonens/Process-machine-interaction for gear honing

2021 ◽  
Vol 111 (05) ◽  
pp. 336-342
Author(s):  
Christian Brecher ◽  
Thomas Bergs ◽  
Caroline Kiesewetter-Marko ◽  
Maximilian Schrank ◽  
Stephan Neus ◽  
...  
Keyword(s):  
Research Project ◽  
Machine Model ◽  
Machine Performance ◽  
Gear Honing ◽  
Process Forces ◽  
Coupled Process ◽  
Machine Interaction ◽  
Process Machine Interaction ◽  
A Current

Für die Endbearbeitung von Zahnrädern wird unter anderem das Verzahnungshonen eingesetzt. Die theoretisch erreichbare Maschinenleistung kann aufgrund auftretender Schwingungen eingeschränkt sein. In einem aktuellen Forschungsprojekt zur Abbildung der Prozess-Maschine-Interaktion beim Verzahnungshonen werden die Eigenschaften der Maschine und die Prozesskräfte berücksichtigt. In diesem Beitrag wird ein gekoppeltes Prozess-Maschine-Modell für das Verzahnungshonen vorgestellt.   One of the processes used for finishing gears is gear honing. The theoretically achievable machine performance can be limited due to occurring vibrations. A current research project for modelling the process-machine interaction in gear honing considers the characteristics of the machine and the process forces. This article presents a coupled process-machine model for gear honing.

Influence of Cup Wheel Grinding and Etching Pretreatment on Residual Stress and Surface Topography for Coated Cemented Carbide Tools

2012 ◽  
Vol 497 ◽  
pp. 10-14
Author(s):  
Tie Jun Song ◽  
Zhi Xiong Zhou ◽  
Wei Li ◽  
Ai Min Tang
Keyword(s):  
Residual Stress ◽  
Surface Topography ◽  
Cutting Tools ◽  
Wheel Speed ◽  
Cemented Carbide ◽  
Machining Process ◽  
Grinding Wheel ◽  
Near Surface ◽  
Cup Wheel ◽  
Coated Cemented Carbide

Cup wheel grinding and etching pretreatment are widely used in complex coated cemented carbide cutting tools machining process. The two processes determine different surface properties due to various mechanical and thermal loads in grinding and complex chemical reaction in etching pretreatment. In this paper, the effect of the grinding wheel speed, the grinding feed rate and the etching time with the Murakami and acid solution on the residual stress and surface topography of coated cemented carbide cutting tools are investigated. After each process, the samples are characterized by scanning electron microscopy and X-ray diffraction. It is found that the grinding wheel speed has a significant influence on residual stress measured in the WC phase. Etching by Murakami generated smooth surface, which partly removed the near-surface residual stress quickly but cannot eliminate.

Implementation of Multirate Estimation for the Cylindrical Grinding Process

2008 ◽  
Author(s):  
Cheol W. Lee
Keyword(s):  
Case Studies ◽  
Manufacturing Industry ◽  
State Parameter ◽  
Process Models ◽  
Machining Process ◽  
Grinding Process ◽  
Wheel Wear ◽  
Estimation Scheme ◽  
Inspection Data ◽  
Grinding Power

This paper presents implementation results of the multirate estimation scheme, proposed by Lee (Lee, C.W., 2007, “Multirate Estimation for the Machining Process under Multirate Noise,” Proceedings of the 2007 ASME IMECE, November 11–15, 2007, Seattle, WA), on the cylindrical plunge grinding process. The multirate scheme is an efficient tool for integrating real-time sensor signals with postprocess inspection data for estimating the immeasurable variables. In order to accomplish this goal, process models for grinding power, surface roughness and wheel wear are developed using experimental data. Case studies are performed on simultaneous state-parameter estimation for actual grinding batches after the multirate observers are built based on the process models. Results from case studies validate the applicability of the proposed scheme to challenging estimation tasks in the manufacturing industry that cannot be undertaken by traditional approaches.

scholarly journals The Effects of Structured Grinding Wheel Designed Parameters On The Geometries of Ground Structured Surfaces

2021 ◽  
Author(s):  
Amr Monier ◽  
Bing Guo ◽  
Qingliang Zhao ◽  
Zhenfei Guo ◽  
Tamer S. Mahmoud ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Geometrical Parameter ◽  
Simulation Models ◽  
Grinding Wheel ◽  
Geometrical Parameters ◽  
Grinding Process ◽  
Surface Geometry ◽  
Structured Surfaces ◽  
Simulation Results ◽  
Grinding Operations

Abstract This study investigates the effects of the structured wheels’ geometrical parameters on the geometries of structured surfaces machined by grinding operations. First, the geometrical parameters of the structured wheels were determined. The resultant geometrical parameters of structured surfaces were defined and related to the designed operating condition, including the structured wheel and grinding process by mathematical and simulation models. The results showed that each wheel’s geometrical parameter affects the structured surface geometry at different rates. Grinding experiments were then performed to explore experimentally how the geometrical parameters of the structured wheel affect the geometry of structured surfaces and verify the modeling and simulation results and explanations. The results showed a remarkable compatibility between the predicted and machined surfaces and reflected the accuracy of the presented method for machining the structured surfaces by grinding.

Kinematics Simulation of Grinding Process Based on Virtual Wheel Model and Micro-Cutting Analysis

2009 ◽  
Author(s):  
Xuekun Li ◽  
Yiming Kevin Rong
Keyword(s):  
Surface Condition ◽  
Machining Process ◽  
Iteration Step ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Wheel Surface ◽  
Grinding Processes ◽  
Kinematics Simulation ◽  
Wheel Model ◽  
Grinding Conditions

Grinding is a special machining process with large number of parameters influencing each other. Any grinding process involves six basic microscopic wheel-workpiece interaction modes in terms of grain cutting, plowing, and sliding, as well as bond-workpiece friction, chip-workpiece friction, and chipbond friction. And quantification of all the 6 modes immensely enhances understanding and managing of the grinding processes. In this paper, the kinematics simulation is presented to imitate the grinding wheel surface moving against the workpiece under specified grinding conditions. The grinding wheel surface is imported from the fabrication analysis based grinding wheel model of previous work. During each simulation iteration step, it provides the number of contacting grains, contact cross-section area for each grain, and resultant workpiece surface condition. Through retrieving the specific force value from the single grain cutting simulation, the cutting force and plowing force can be calculated. This model can also be potentially used in the time dependent behavior and thermal analysis of grinding processes.

Influence of Dielectric Jet Flushing during Electro Discharge Diamond Surface Grinding Process

2013 ◽  
Vol 652-654 ◽  
pp. 2187-2190
Author(s):  
Gopal Agarwal ◽  
Manoj Modi
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Electrical Discharge Machine ◽  
Surface Grinding ◽  
Machining Process ◽  
Diamond Surface ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Hybrid Machining Process

The influence of dielectric jet flushing during Electro Discharge Diamond Surface Grinding (EDDSG) on Ti-6A-4V has been reported in this paper. The metal bonded diamond grinding wheel is used as electrode in Electro Discharge Diamond Surface Grinding process. In this process mechanical grinding is coupled with electrical spark of electrical discharge machine to take up the advantages associated with hybrid machining process. The important input parameters in this investigation were “duty factor”, “wheel speed (rpm)”, “magnitude of current (ampere)” and its “duration (Ton, micro-second)”. The effects of these parameters on outcomes i.e. material removal rate (MRR) and surface roughness (Ra) are measured. The noticeable enhancements in material removal rate and surface finish have been seen during EDDSG of Ti-6Al-4V with effective jet flushing. The performance of EDDSG with jet flushing and without jet flushing has been compared.

scholarly journals Morphology of Near- and Semispherical Melted Chips after the Grinding Processes Using Sol-Gel Abrasives Based on SEM-Imaging and Analysis

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
W. Kapłonek ◽  
K. Nadolny ◽  
W. Habrat
Keyword(s):  
Sol Gel ◽  
Machining Process ◽  
Grinding Wheel ◽  
Geometrical Parameters ◽  
Grinding Process ◽  
Sintered Corundum ◽  
Internal Cylindrical Grinding ◽  
Sem Imaging ◽  
Titanium Grade ◽  
Process Observation

Selected issues related to SEM-imaging and image analysis of spherical melted chips formed during the grinding process are presented and discussed. The general characteristics of this specific group of machining products are given. Chip formation phenomena, as well as their overall morphology, are presented using selected examples of near- and semispherical melted chips occurring singly or concentrated in clusters on the grinding wheel surface after the machining process. Observation of the spherical melted chips and acquisition of their images were carried out for grinding wheel active surfaces with microcrystalline sintered corundum abrasive grains SG™after the internal cylindrical grinding process of a 100Cr6 steel and Titanium Grade 2® alloy by use of a scanning electron microscope, JEOL JSM-5500LV. Analysis of the obtained SEM micrographs was carried out by Image-Pro® Plus 5.0 software to determine the selected geometrical parameters describing the morphological features of the assessed chips.

Precision form Grinding of Ceramic Materials with Diamond Grinding Wheel

2007 ◽  
Vol 359-360 ◽  
pp. 90-93
Author(s):  
Zhong Ming Cui ◽  
Deng Jie Zhu ◽  
Lei Du
Keyword(s):  
High Efficiency ◽  
Ceramic Materials ◽  
Diamond Wheel ◽  
Machining Process ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Abrasive Wheel ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Form Grinding

Ceramic is difficult to cut with normal machining method in precision intricate profile. The grinding process with diamond abrasive wheel is an effective process to machining ceramic materials. In this paper, a precise form-grinding method of ceramic materials with diamond grinding wheel is introduced. The tolerance of intricate profiler precision degree by this grinding process is less than 0.005mm. The machining process contains many techniques as high efficiency of profiler dressing technique of diamond wheel and form grinding process of ceramic. It gives some references on the developing of ceramic precision intricate profile machining techniques forward.

Sign in / Sign up

Export Citation Format

Share Document