Study on Grinding Machinability of Titanium Alloy Using SiC Abrasive

2011 ◽  
Vol 487 ◽  
pp. 34-38 ◽  
Author(s):  
Guo Giang Guo ◽  
X.H. Zheng ◽  
Z.Q. Liu ◽  
Qing Long An ◽  
Ming Chen
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Surface Topography ◽  
Specific Energy ◽  
Ground Surface ◽  
Grinding Force ◽  
Grinding Forces ◽  
Grinding Mechanism ◽  
Dry Conditions ◽  
Metallurgical Structure

Experimental results of Ti-6-2-4-2S, Ti-6-4 and Ti-5-5-5-1-1 are detailed in this paper with conventional surface grinding using SiC abrasive under dry conditions. Measurements of grinding forces, surface topography and metallurgical structure of ground surface were taken to investigate the grinding mechanism of these materials. The results showed grinding force ratios to these materials were between 1.35 to 2.25 at all material remove rates, but the specific energy to Ti-5-5-5-1-1 and Ti-6-2-4-2S were little higher than Ti-6-4. Evaluation of ground surface topography indicated they were visually free of crack and burn. At the same grinding parameters, Ti-5-5-5-1-1 had the maximum depth of heat-affected zone because of its poor high temperature properties.

Finite Element Simulation of Axial Creep-Feed Grinding Engineering Ceramics Based on ANSYS/LS-DYNA

2012 ◽  
Vol 472-475 ◽  
pp. 927-931
Author(s):  
Xin Li Tian ◽  
Fu Qiang Li ◽  
Ya Tao Mao ◽  
Bao Guo Zhang ◽  
Jian Quan Wang
Keyword(s):  
Grinding Force ◽  
Grinding Forces ◽  
Engineering Ceramics ◽  
Creep Feed Grinding ◽  
Creep Feed ◽  
Element Simulation ◽  
Grinding Conditions ◽  
Grinding Mechanism ◽  
Single Grain ◽  
Diamond Grain

Introducing the grinding mechanism of axial creep-feed grinding ceramics with a single diamond grain. Establishing the simulation model of a single grain grinding engineering ceramics by axial creep-feed grinding and analyzing the simulation results of the grinding force in the X,Y,Z axis. Finally, the impacts of the wheel speed, axial feed rate and workpiece speed upon grinding forces were discussed by simulating the single diamond abrasive grinding process under different grinding conditions.

Grinding Force in Creep Feed Grinding of Titanium Alloy with Monolayer Brazed CBN Wheels

2012 ◽  
Vol 565 ◽  
pp. 94-99 ◽  
Author(s):  
Chang Yong Yang ◽  
Jiu Hua Xu ◽  
Wen Feng Ding
Keyword(s):  
Titanium Alloy ◽  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Grinding Force ◽  
Grinding Forces ◽  
Specific Grinding Energy ◽  
Creep Feed Grinding ◽  
Creep Feed ◽  
Force Ratio ◽  
Composite Filler

In this paper, grinding forces of titanium alloy Ti-6Al-4V are measured during creep feed grinding with brazed cubic boron nitride (CBN) wheels. The effects of process parameters on grinding force, force ratio and specific grinding energy are investigated in detail. The grinding force is low and force ratio is about 1.5, and the specific grinding energy of titanium alloys Ti-6Al-4V is about 65J/mm3. Also, CBN wheels brazed with composite filler of Ag-Cu-Ti and 0.5wt.% lanthanum show better grinding performance than the counterpart brazed with Ag-Cu-Ti filler in this investigation.

Investigation of Abrasive Wear in the Dry Belt Grinding of Titanium Alloy

2011 ◽  
Vol 697-698 ◽  
pp. 121-124 ◽  
Author(s):  
Wen Guo Huo ◽  
Jiu Hua Xu ◽  
Yu Can Fu ◽  
Hou Jun Qi
Keyword(s):  
Titanium Alloy ◽  
Surface Morphology ◽  
Abrasive Wear ◽  
Surface Topography ◽  
Grinding Force ◽  
Milling Machine ◽  
Excellent Performance ◽  
Belt Grinding ◽  
Dry Grinding ◽  
Abrasive Surface

This paper was dedicated to elucidate an investigation of abrasive wear and surface topography of Titanium alloy TA15 on dry grinding with zirconia alumina belt. In the investigation, experiments were performed on milling machine XS5040 equipped with assembled belt grinding device. The wear abrasive, surface morphology of machined belt in different phase were analyzed using 3D viewer microscope. The results show that the wear of belt abrasive is mainly steady attritions wear since zirconia alumina belt was stable on dry grinding. At higher grinding force, the abrasive was found to undergo dislodging prior to being gradually worn. So zirconia alumina belt has excellent performance in the dry grinding titanium alloy.

Test and Analysis of Electric Arc Machining Characteristics of Titanium Alloy and High-Temperature Alloy

2015 ◽  
Vol 667 ◽  
pp. 123-129
Author(s):  
Hai Peng ◽  
Yang Zhai
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Processing Parameters ◽  
Electric Arc ◽  
High Temperature Alloy ◽  
Processing Efficiency ◽  
Good Surface ◽  
Machining System ◽  
Metallurgical Structure ◽  
Processing Properties

The short electric arc machining technique is a new type of strong current processing method, which has many advantages, especially for difficult-to-machine materials, such as no cutting force, small cutting chips, easy to chip removal, high processing efficiency and so on. In this paper, the electric arc processing cutting performance of two typical difficult-to-machine materials, titanium alloy and high-temperature alloy, was studied by electric machining cutting experiment to analyze the influence of arc processing on the properties of materials. Using the designed electric arc machining system, the effect of electrical processing parameters on processing properties was discussed. Furthermore, the surface layer hardness and materials metallurgical structure were detected to study the change of material internal organization and the effects on material properties change, which provide the corresponding theoretical analysis basis for arc machining of difficult-to-machine materials. Experimental results show that the titanium alloy and high-temperature alloy have small heat affected zone and hardening layer after electric arc processing, which could meet the requirement of subsequent machining to obtain a good surface quality.

In-process detection of grinding wheel truing and dressing conditions using a flapper nozzle arrangement

1997 ◽  
Vol 211 (5) ◽  
pp. 335-343 ◽  
Author(s):  
T M A Maksoud ◽  
A A Mokbel ◽  
J E Morgan
Keyword(s):  
Surface Topography ◽  
Ground Surface ◽  
Grinding Wheel ◽  
Grinding Forces ◽  
Accurate Identification ◽  
Wheel Topography ◽  
On Line ◽  
Sharp Edges ◽  
Process Detection ◽  
Grinding Operations

The spatial distribution of sharp cutting edges around the active periphery of a grinding wheel has an important effect on the surface finish of ground components. In addition, random protrusion of sharp edges can result in a random distribution of grinding forces acting on the ground surface. A uniformly dressed and accurately trued wheel is essential for successful grinding. Since these conditions will alter during use, monitoring of them during grinding must be a requirement for critical grinding operations. This paper describes a new system for achieving on-line detection of the grinding wheel condition. The system uses a small air flapper nozzle-transducer arrangement which detects in-process changes of the grinding wheel surface topography, where external triggering of the data-acquisition system ensures a highly accurate identification of the wheel's surface topography irrespective of wheel speed. The benefits of this system are illustrated by experimental results that correlate the measurement of wheel topography by two means: flapper nozzle and stylus.

Analysis of Influence Factors for the Contact Length between Wheel and Workpiece in Surface Grinding

2007 ◽  
Vol 359-360 ◽  
pp. 128-132 ◽  
Author(s):  
Cong Mao ◽  
Zhi Xiong Zhou ◽  
De Wang Zhou ◽  
Du Yi Gu
Keyword(s):  
Influence Factors ◽  
Contact Length ◽  
Grinding Force ◽  
Grinding Temperature ◽  
Grinding Forces ◽  
Contact State ◽  
Grinding Conditions ◽  
Grinding Mechanism ◽  
Thermocouple Method ◽  
Critical Contact

In order to understand the grinding mechanism and analyze the grinding operation, it is necessary to study the contact phenomena between wheel and workpiece during grinding operation. The contact length, the grinding temperature distribution within the contact zone, and the grinding forces are measured in-process by using Critical Contact State mode, thermocouple method, and 3-axis piezoelectric dynamometer, respectively. It is found that the grinding conditions and the properties of work material have effects on the contact length, moreover, the mechanism of which is discussed in this paper. The results show that the contact length significantly interacts with grinding force and grinding temperature in the grinding zone.

Experimental Study on Micro-Grinding Process of Titanium Alloy Using Electro-Hydro-Dynamic Spray With Nanofluid and Compressed Air

2015 ◽  
Author(s):  
Pil-Ho Lee ◽  
Jung Soo Nam ◽  
Jung Sub Kim ◽  
Sang Won Lee
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Titanium Alloy ◽  
Surface Quality ◽  
Ground Surface ◽  
Experimental Results ◽  
Compressed Air ◽  
Grinding Process ◽  
Grinding Forces ◽  
Micro Scale

In this paper, the micro-scale grinding processes of titanium alloy (Ti-6Al-4V) using electro-hydro-dynamic (EHD) spray with nanofluid and compressed air are experimentally investigated. In the experiments, specific micro-grinding forces and surface roughness of the ground workpiece are quantitatively analyzed as a function of nanofluid’s concentration and size of nanoparticles. In addition, the ground surface quality is qualitatively investigated by comparing the optical microscopic images. The experimental results show the effectiveness of EHD spraying with nanofluid and compressed air for reducing the specific micro-grinding forces and enhancing ground surface quality.

Grinding Force and Surface Integrity on Dry Belt Grinding of TA15 Titanium Alloys

2009 ◽  
Vol 416 ◽  
pp. 269-273 ◽  
Author(s):  
Wen Guo Huo ◽  
Jiu Hua Xu ◽  
Yu Can Fu
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
High Surface ◽  
Surface Hardness ◽  
Ground Surface ◽  
Grinding Force ◽  
Belt Grinding ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Dry Grinding

This paper was dedicated to elucidate an investigation of grinding force and workpiece surface of Titanium alloy TA15 in dry grinding by using zirconia alumina belts. The grinding forces were measured by KISTLER 9265B dynamometer. Machined surface morphology and the metallographic structure were observed using 3D viewer microscope. Surface roughness was measured using Mahr Perthometer M1 instrument. The surface microhardness for ground surface was detected by HVS-1000 instrument. The good results were obtained, as follows: low surface roughness, high surface hardness, no microstructural damage, in the form cracks or recrystallisation of the grinding surface, the stable grinding performance with zirconia alumina belts, the small plastic deformation depth of workpiece surface (≤5μm). Therefore belt grinding showed excellent performance during grinding titanium alloy.

Theoretical Model of Grinding Force in Quick-Point Grinding

2009 ◽  
Vol 626-627 ◽  
pp. 75-80 ◽  
Author(s):  
Jian Qiu ◽  
Ya Dong Gong ◽  
Yue Ming Liu ◽  
J. Cheng
Keyword(s):  
Material Removal ◽  
Tangential Velocity ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Equivalent Diameter ◽  
Grinding Forces ◽  
Cutting Depth ◽  
Force Ratio ◽  
Grinding Mechanism ◽  
Material Removal Mode

Separating the workpiece velocity on the plane of grinding wheel, it is helpful to analyze Quick-point grinding mechanism. There are some relations among wheel’s deflective angle, workpiece feed velocity and tangential velocity. In this research, the resultant workpiece speed, grinding contact zone and material removal mode is analyzed. And a model is established which is helpful to analyze the tendency of component grinding forces and force ratio. It is found the grinding force is influenced by the factors such as cutting depth, wheel velocity, grinding angle as well as equivalent diameter, respectively. Finally, a theoretical basis for actual processing is provided.

Grinding Force and Specific Energy in Plunge Grinding of 20CrMnTi with Monolayer Brazed CBN Wheel

2013 ◽  
Vol 770 ◽  
pp. 34-38 ◽  
Author(s):  
Shen Shen Gu ◽  
Chang Yong Yang ◽  
Yu Can Fu ◽  
Wen Feng Ding ◽  
Da Shun Huang
Keyword(s):  
Specific Energy ◽  
Cubic Boron Nitride ◽  
Chip Thickness ◽  
Grinding Force ◽  
Depth Of Cut ◽  
Grinding Forces ◽  
Wheel Surface ◽  
Plunge Grinding ◽  
Cbn Wheel ◽  
White Fused Alumina

In this paper, plunge grinding experiment was conducted on 20CrMnTi with monolayer brazed cubic boron nitride (CBN) wheel. Surface integrity was evaluated through morphology observing and roughness testing. It is found that surface roughness Ra is lower than 0.8μm. Grinding forces were measured and the effects of process parameters (i.e. workpiece speed and depth of cut) on grinding forces were studied. The changing regulation of specific grinding energy with the increase of equivalent chip thickness was revealed. The result shows that both grinding force and specific energy are lower comparing with white fused alumina (WA) wheels. In general, monolayer brazed CBN wheels perform better in grinding of 20CrMnTi than WA wheels.

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