Abstract The applications of hard and brittle materials, typically represented by advanced ceramics, for a number of high-performance components have recently generated high interest. To meet this increasing demand, high efficiency machining technologies are needed. In this keynote paper, the characteristic features of hard and brittle materials are outlined.
The grinding ratio calculated from the ratio of the groove depth to the amount of grinding has a very different trend for hard and brittle materials and metallic materials. In the machining of hard and brittle materials, the amount of machining increased rapidly as machining progressed, so the grinding ratio also increased, but in metallic ...
Ultrasonic vibration assisted face grinding (UAFG) has excellent performance in hard and brittle materials processing. In order to reveal the surface generating mechanism and improve the machining quality, this study was dealing with investigation on ultrasonic energy distribution and surface generating characteristics.
Machining trials were conducted on hard-brittle materials such as soda glass, quartz glass, silicon and quartz wafers using the newly developed machining device under the externally applied hydrostatic pressures of zero and 400 MPa. The machined traces were analyzed by laser microscope.
1. Introduction. Several machining technologies including laser beam machining, micro-cutting, micro-grinding,, and electrical discharge machining (EDM) are successfully used for processing microstructured surfaces on different materials. However, the efficient precision machining of microstructured surface on hard and brittle material components requires good surface quality and …
Ductile streaks in precision grinding of hard and brittle materials 917 rotation of the work piece, as well as relative to the apex P, of the paraboloid. The sequence is then repeated to form a neighbouring zone of the one indicated in figure 1a.
In this keynote paper, the characteristic features of hard and brittle materials are outlined. Considering these features, a fundamental principle for grinding those materials is discussed, followed by practical examples of advanced ceramic grinding. Remarks for attaining high-efficiency grinding of hard and brittle materials are presented.
Download Citation | Experimental study on ultrasonic grinding of hard and brittle materials | In order' to investigate the low efficiency problem in grinding hard-brittle materials, an ultrasonic ...
The microgrind-ing process with diamond microgrinding wheels enables a fast and high-quality fabrication of microstructures in various hard and brittle mate-rials [1, 2, 3]. CVD-coated tools for ...
Supplement Vo!. 12 No.2, 2004 Precision Grinding of Hard and Brittle Materials Fig. 2: High speed jig grinding of silicon and glass Two grinding wheel bond types, metal and resinoid, each with three different grit sizes, 10-30 mm, 40-60 mm and 50-70 mm were …
T1 - Combined Machining of Hard and Brittle Materials (Combination of Electric Discharge Machining and Grinding) AU - Aoyama, Hidehiko. AU - Inasaki, Ichiro. AU - Aoyama, Tojiro. AU - Sekiya, Shinji. PY - 1985. Y1 - 1985. N2 - Combination of two machining processes has possibility to …
Ductile streaks produced during diamond grinding of hard and brittle materials have aided the subsequent process of polishing. Two novel techniques were used to study the formation of ductile mode streaks during diamond grinding (primary process) of germanium, silicon, and glass. In the first technique, aspheric surfaces were generated on Ge and Si at conventional speeds (5000 rpm).
Pre-LAG uses a laser beam to preheat the workpiece and improve a material's machinability. The grinding wheel is used to remove the heated material subsequently, as shown in Fig. 5(b), achieving a lower grinding force and longer wheel life [170,177]. In this way, a hard and brittle workpiece with a large aperture can be machined more efficiently.
Ductile streaks produced during diamond grinding of hard and brittle materials have aided the subsequent process of polishing. Two novel techniques were used to study the formation of ductile mode ...
Two types of devices were developed for hard and brittle material back grinding. In the first case, the abrasive tool was subjected to ultrasonic excitation. In the second case, the workpiece was actuated instead. It was found that the brittle-ductile transition of the hard brittle materials was possible to achieve when the workpiece was affected by ultrasonic vibration at high frequencies ...
Micro-Grinding Performance of Hard-Brittle Chip Materials in Precision Micro-Grinding Microgroove ZHANG Long (), XIE Jin (), ZHU Limin (), LU Yanjun ()
Ultrasonic assisted grinding (UAG) is one of the most suitable methods for the processing of hard and brittle materials such as silicon carbide (SiC). During UAG of SiC, the machining quality is directly determined by the material removal mechanism. However, the research on the material removal mechanism for UAG of SiC is still not sufficiently developed. To achieve better comprehension of the ...
Ultrasonic vibration assisted grinding (UAG) is an effective processing method for hard and brittle materials. Compared with common grinding (CG), both of grinding force and workpiece surface quality is improved by UAG, but the principle of improvement is still unclear.
Microaspherical and freeform optics of hard and brittle materials have been more and more widely used in aerospace, optical system, and digital products with the rapid development of science and technology. The wheel normal grinding has an important practical significance for the manufacture of these microaspherical and freeform optical surfaces because not only the interference between ...
In grinding of brittle materials, because of the brittle and hard nature, the material will be removed in both ductile and brittle modes, which make the modeling of surface roughness difficult ...
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract. Ductile streaks produced during diamond grinding of hard and brittle materials have aided the subsequent process of polishing. Two novel techniques were used to study the formation of ductile mode streaks during diamond grinding (primary process) of germanium, silicon, and glass.
finishing of hard and brittle materials with nano-surface finish, high tolerance and accuracy. Grinding with superabrasive wheels is an excellent way to produce ultra-precision surface finish. However, superabrasive diamond grits need higher bond-ing strength while grinding, which metal-bonded grinding wheels can offer. Truing
The machining of thin and fragile material is very difficult for manufacturing industries and rapid demand of requirement could not be achieved. Electrical discharge machining is more acceptable machine tool for machining hard and brittle electrically conductive materials but its productivity is very slow. In past decade, researchers are focus on electrical discharge grinding (EDG) for ...
This application note discusses the Edge Grinding of hard, brittle materials that are common to semiconductor, MEMS, LEDs, and other applications. Edge grinding, also known as Edge Profiling, is a process that is common to the manufacture of nearly all semiconductor related
Grinding Brittle Materials As seen in Ceramic Industry By Aggressive Grinding Service, Inc. In the industrial world, brittle materials include the range of cemented tungsten carbide grades, the entire family of advanced ceramics—including silicon carbide, …
Cutting force is one of the most important factors in the ultrasonically assisted grinding (UAG) of hard and brittle materials. Many theoretical and experimental studies show that UAG can effectively reduce cutting forces. The existing models for UAG mostly assume an ideal grinding wheel with abrasives in both the end and lateral faces to accomplish material removal, whereas the important role ...
Ductile streaks produced during diamond grinding of hard and brittle materials have aided the subsequent process of polishing. Two novel techniques were used to study the formation of ductile mode ...
Precision Grinding of Hard and Brittle Materials Two cup-shapedidentical size diamond-grindingwheels with metallic (D20/30 MIC L50M-l/4) and resinoid (SD240-RIOOB69-6mm) bonding were used. The profile of the grinding edge is circular in this case, …
This paper presents an experimental and theoretical study of surface generation in the ultra-precision grinding of hard and brittle materials. The study takes into account the material properties, the relative vibration between the grinding wheel and the workpiece, the machining parameters and the phase shift of the grinding process. The Taguchi approach is employed to study the influence of ...
