Micro-Grooving of Glass Using Small-Diameter Diamond Grindstone with Ultrasonic Vibration

2013 ◽  
Vol 797 ◽  
pp. 368-373 ◽  
Author(s):  
Shigeomi Koshimizu ◽  
Shigeru Aoki
Keyword(s):  
Process Control ◽  
Ultrasonic Vibration ◽  
Material Removal ◽  
High Efficiency ◽  
Small Diameter ◽  
Grinding Process ◽  
Glass Material ◽  
Glass Substrates ◽  
Micro Grooving ◽  
Average Size

The purpose of this study was to achieve grooving on glass substrates with high levels of efficiency and precision with the use of a diamond grindstone with a small diameter in the range of 1.0-1.8 mm. Mechanical material removal by grinding has high efficiency and enables process control for creating complicated forms, but has a drawback of generating chippings on the processed surface of the brittle glass material. The study gave ultrasonic vibration of 10 μm at 20 kHz in the thrust direction to the rotating small-diameter diamond grindstone in the grinding process, in order to attain high levels of efficiency and precision in micro-grooving of glass. The grooving approach with ultrasonic vibration did create some minor chippings, but succeeded in meeting the target of reducing the average size of chippings around the groove to 0.1 mm or less.

scholarly journals Research on Material Removal Mechanism of C/SiC Composites in Ultrasound Vibration-Assisted Grinding

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1918
Author(s):  
Dongpo Wang ◽  
Shouxiang Lu ◽  
Dong Xu ◽  
Yuanlin Zhang
Keyword(s):  
Ultrasonic Vibration ◽  
Material Removal ◽  
Failure Modes ◽  
High Efficiency ◽  
Abrasive Particle ◽  
Grinding Force ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Cutting Test ◽  
Sic Composites

C/SiC composites are the preferred materials for hot-end structures and other important components of aerospace vehicles. It is important to reveal the material removal mechanism of ultrasound vibration-assisted grinding for realizing low damage and high efficiency processing of C/SiC composites. In this paper, a single abrasive particle ultrasound vibration cutting test was carried out. The failure modes of SiC matrix and carbon fiber under ordinary cutting and ultrasound cutting conditions were observed and analyzed. With the help of ultrasonic energy, compared with ordinary cutting, under the conditions of ultrasonic vibration-assisted grinding, the grinding force is reduced to varying degrees, and the maximum reduction ratio reaches about 60%, which means that ultrasonic vibration is beneficial to reduce the grinding force. With the observation of cutting debris, it is found that the size of debris is not much affected by the a p with ultrasound vibration. Thus, the ultrasound vibration-assisted grinding method is an effective method to achieve low damage and high efficiency processing of C/SiC composites.

Ultrasonic Coring of Glass Disks Using Double Core Tool

2011 ◽  
Vol 325 ◽  
pp. 436-441 ◽  
Author(s):  
Shigeomi Koshimizu
Keyword(s):  
High Precision ◽  
Ultrasonic Vibration ◽  
High Efficiency ◽  
Thrust Force ◽  
Recording Media ◽  
High Quality ◽  
Magnetic Disk ◽  
Glass Substrates ◽  
Ultraviolet Curable ◽  
Produce Glass

Glass disks are used as substrates for the recording media in magnetic disk devices. To mass produce glass disks, a technology is required for machining glass (a material that is difficult to machine) with both high precision and high efficiency. Consequently, this study adopted a method that processes the inner- and outer-diameters simultaneously using a double core tool. In addition, the thrust force in coring process was also reduced using an ultrasonic spindle to apply ultrasonic vibration to the feed direction of the rotating tool. This resulted in high quality machining with less chipping. Furthermore, this study conducted experiments to compare the three methods of stabilizing the stack of glass substrates. As a result, it was found that the method using ultraviolet curable resin was able to limit the chipping to a smaller size.

Research on Surface Quality by Ultrasonic Vibration-Assisted Face Grinding of Cemented Carbide

2021 ◽  
Vol 324 ◽  
pp. 52-57
Author(s):  
Guang Jun Chen ◽  
Jin Kai Xu ◽  
Jia Qi Wang ◽  
Jing Dong Wang ◽  
Le Tong ◽  
...  
Keyword(s):  
Ultrasonic Vibration ◽  
Material Removal ◽  
High Efficiency ◽  
Cemented Carbide ◽  
Material Surface ◽  
Precision Manufacturing ◽  
Conventional Grinding ◽  
Face Grinding ◽  
Ultrasonic Vibration Assisted Grinding ◽  
Better Than

Cemented carbide has huge applications in industrial production, but its high mechanical properties also increase the difficulty of processing. In this work, ultrasonic vibration-assisted grinding technology is used for the precision manufacturing of cemented carbide. The influence of the dynamic trajectory of the grains on the material removal process is analyzed. The morphology and roughness of the processed surface are measured and studied. It was observed that in the conventional grinding, the blade pattern is obvious with some defects on the surface. While in the ultrasonic vibration-assisted grinding, the material surface is mainly distributed with pits and small protrusions, and there is no obvious blade pattern. According to the roughness test, the roughness of ultrasonic vibration-assisted grinding is better than that of conventional grinding, and the increase in amplitude has a significant effect on the improvement of roughness. When the amplitude increases from 3μm to 9μm, the surface roughness is improved about 38.1%. The research of ultrasonic vibration-assisted grinding should be of great importance for promote the high-efficiency and high-quality processing and special applications of cemented carbide.

Research on Ultrasonic-Assisted Fixed-Abrasive Lapping Technology for Engineering Ceramics Cylindrical Part

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Feng Jiao ◽  
Bo Zhao
Keyword(s):  
Ultrasonic Vibration ◽  
Material Removal ◽  
High Efficiency ◽  
Removal Rate ◽  
Tangential Force ◽  
Cylindrical Part ◽  
Engineering Ceramics ◽  
Machining Quality ◽  
Ultrasonic Assisted ◽  
Fixed Abrasive

Lapping is a key processing step for precision parts, which directly affects machining quality, precision, and efficiency. Due to some drawbacks of free-abrasive lapping such as deep scratches on the lapped surface, lower lapping efficiency for lower lapping speed, severe waste of abrasive, high-processing cost, and so on, conventional fixed-abrasive lapping (CFL) technology was proposed and developed recently. Meanwhile, considering the unique advantages of the ultrasonic-assisted machining during the processing of those hard and brittle materials and the effect of ultrasonic vibration on the self-sharpening characteristic of abrasive pellet, a novel ultrasonic-assisted fixed-abrasive lapping (UAFL) technology is put forward and corresponding lapping device for engineering ceramics cylindrical part is developed in this paper. Meanwhile, UAFL mechanism and characteristics were studied theoretically and experimentally. Research results show that superimposed ultrasonic vibration changes the lapping movement characteristics and material removal mechanism to a certain extent, helping to heighten material removal rate, smoothen the waveform of tangential force, reduce the average tangential force, and improve surface machining quality. UAFL can be regarded as a high efficiency and precision processing technology for engineering ceramics cylindrical part.

scholarly journals PROMISING DIRECTIONS TO INCREASE GRINDING EFFICIENCY IN MACHINE PARTS SURFACES

2016 ◽  
Vol 2016 (2) ◽  
pp. 112-120
Author(s):  
Алексей Данилович Кулинский ◽  
Aleksey Danilovich Kulinskiy ◽  
Лиана Гусакова ◽  
Liana Gusakova ◽  
Виктор Бутенко ◽  
...  
Keyword(s):  
Material Removal ◽  
High Efficiency ◽  
Grinding Process ◽  
Nickel Steel ◽  
Grinding Wheels ◽  
Promising Direction ◽  
Efficiency Increase ◽  
Machine Parts ◽  
Grinding Efficiency ◽  
Iron Chromium

The problem of grinding process increase for machine parts surfaces can be solved by means of abrasive disks design updating, their composition and impregnation technologies. The structures of multiple grinding wheels containing rods in a basic abrasive mass including conducting elements are offered. Such disks allow increasing quality in surfaces machined of parts made of tough hardtomachine steel and alloys on the basis of nonferrous metals on indices of roughness, technological residual stresses and burns. High efficiency show multi-sector abrasive disks of different grain allowing the increase considerably the intensity of material removal at machining parts made of chro-mium-nickel steel and alloys. The effective composi-tions of abrasive masses are developed for tool manufacturing including the introduction in them highstrength ferritic iron, chromium diiodide and wood resin. Polishing tools made of abrasive mass have 1.5 –twice higher durability between stropping operations and ensure the decrease of burn areas quantity on ma-chined surfaces of parts 2-2.5 times. The promising direction of the efficiency increase in parts surface grinding is the impregnation of abrasive disks by an aqueous solution of chromium diiodide which possesses high anticeptic properties and at the iodine emission forms iron iodides with a low constant of friction. As a result of this the temperature drops in the grinding area by more than 30%.

Modeling of High Efficiency Removal in the Grinding of Aluminal/ZrO2 Nanocomposites with the Aid of Two-Dimensional Ultrasonic Vibration

2007 ◽  
Vol 329 ◽  
pp. 451-458 ◽  
Author(s):  
Yan Wu ◽  
A.G. Sun ◽  
Bo Zhao ◽  
Xun Sheng Zhu
Keyword(s):  
Ultrasonic Vibration ◽  
Material Removal Rate ◽  
Material Removal ◽  
High Efficiency ◽  
Removal Rate ◽  
Abrasive Particle ◽  
Experimental Results ◽  
Two Dimensional ◽  
Conventional Grinding ◽  
Vibration Assistance

Based on the single abrasive particle motion locus of elliptical spiral in two-dimensional ultrasonic vibration grinding (WTDUVG), the theoretical model representing the material removal rate are deduced and verified, and the reason of high efficiency material removal by applying two-dimensional ultrasonic vibration is analyzed. Finally, experimental researches on material removal rate of ceramics were carried out using coarse grit diamond wheel both with and without workpiece two-dimensional ultrasonic vibration assistance grinding. Experimental results indicated that (1) Material removal rate (MRR) in vibration grinding process is about 1.5 times as large as that of in conventional grinding, the experimental results are in good agreement with the calculated ones. (2)The material removal rate increases along with increases of the grinding depth and workpiece velocity both in with and without vibration grinding. (3)The vibration grinding surface had no spur and build-up edge and its surface roughness was smaller than CG significantly. Surface quality of WTDUVG is superior to that of conventional grinding, it is easy for ultrasonic vibration grinding that material removal mechanism is ductile regime grinding.

Modeling of Material Removal in Workpiece Lateral Ultrasonic Vibration Grinding of Fine-Crystalline Zirconia Ceramics

2006 ◽  
Vol 315-316 ◽  
pp. 304-308 ◽  
Author(s):  
Yan Wu ◽  
Bo Zhao ◽  
Xun Sheng Zhu
Keyword(s):  
Surface Roughness ◽  
Ultrasonic Vibration ◽  
Material Removal ◽  
High Efficiency ◽  
Removal Rate ◽  
Average Diameter ◽  
Diamond Wheel ◽  
Movement Model ◽  
Ultrasonic Grinding ◽  
Conventional Grinding

Based on the grain movement model of ultrasonic grinding, models representing the grinding force of single abrasive and the material removal rate (MRR) are deduced and verified. Mechanism of high efficiency material removal in work lateral ultrasonic vibration grinding (WLUVG) was analyzed. The MRR of fine-crystalline ZrO2 ceramics in WLUVG and conventional grinding (CG) with diamond wheel were researched experimentally in this work. The effects on the MRR, the surface roughness and microstructure of the process parameters and the size of abrasive are measured. It has been concluded that: (1) the MRR in ultrasonic grinding process is two times as large as that of in CG. (2) any increase in the amount of energy imparted to the workpiece in terms of the average diameter of grains, grinding depth both in with and without ultrasonic grinding, will result in an increase in the MRR and the surfaces roughness. (3) the ultrasonic grinding surface had no spur and build-up edge and its surface roughness was smaller than CG significantly. Surface quality of vibration grinding is superior to that of CG, it is easy for ultrasonic vibration grinding that material removal mechanism is ductile mode grinding.

Development of an AC Electrical Field Tribochemical Polishing Technique to Promote High-Efficiency Polishing for Glass Substrates

2012 ◽  
Vol 78 (4) ◽  
pp. 316-320
Author(s):  
Hiroshi IKEDA ◽  
Yoichi AKAGAMI ◽  
Michio UNEDA ◽  
Osamu OHNISHI ◽  
Syuhei KUROKAWA ◽  
...  
Keyword(s):  
High Efficiency ◽  
Electrical Field ◽  
Glass Substrates

scholarly journals Tentative Investigations on Reducing the Edge Effects in Pre-Polishing the Optics

2020 ◽  
Vol 10 (15) ◽  
pp. 5286
Author(s):  
Xiaolong Ke ◽  
Lei Qiu ◽  
Chunjin Wang ◽  
Zhenzhong Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Edge Effect ◽  
Edge Effects ◽  
Material Removal ◽  
Processing Time ◽  
Grinding Process ◽  
Element Analysis ◽  
Edge Zone ◽  
The Finite Element Analysis

The material removal depth in the pre-polishing stage of the precision optics is usually tens of microns to remove the subsurface damage and grinding marks left by the previous grinding process. This processing of the upstand edge takes a large part of the time at this stage. The purpose of this paper is to develop a method that can reduce the edge effect and largely shorten the processing time of the pre-polishing stage adopting the semirigid (SR) bonnet. The generation of the edge effect is presented based on the finite element analysis of the contact pressure at the edge zone firstly. Then, some experimentations on the edge effect are conducted, and the results proved that the SR bonnet tool can overhang the workpiece edge in the pre-polishing stage to reduce the width and height of the upstand edge to largely shorten the subsequent processing time of it. In addition, there exists a perfect overhang ratio, which generates the upstand edge with the smallest width and height, with no damage to the bonnet tool in the meantime. In addition, one combination of the pre-polishing parameters is concluded according to this method, which can be safely adopted in practical process.

scholarly journals Study on the Effect of Grinding Pressure on Material Removal Behavior Performed on a Self-Designed Passive Grinding Simulator

2021 ◽  
Vol 11 (9) ◽  
pp. 4128
Author(s):  
Peng-Zhan Liu ◽  
Wen-Jun Zou ◽  
Jin Peng ◽  
Xu-Dong Song ◽  
Fu-Ren Xiao
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Service Life ◽  
Material Removal ◽  
Removal Rate ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Grinding Temperature ◽  
Grinding Efficiency

Passive grinding is a new rail grinding strategy. In this work, the influence of grinding pressure on the removal behaviors of rail material in passive grinding was investigated by using a self-designed passive grinding simulator. Meanwhile, the surface morphology of the rail and grinding wheel were observed, and the grinding force and temperature were measured during the experiment. Results show that the increase of grinding pressure leads to the rise of rail removal rate, i.e., grinding efficiency, surface roughness, residual stress, grinding force and grinding temperature. Inversely, the enhancement of grinding pressure and grinding force will reduce the grinding ratio, which indicates that service life of grinding wheel decreases. The debris presents dissimilar morphology under different grinding pressure, which reflects the distinction in grinding process. Therefore, for rail passive grinding, the appropriate grinding pressure should be selected to balance the grinding quality and the use of grinding wheel.

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