CBN brief

Overview
Vitrified diamond grinding wheel with a good proportion of the vitrified bonded abrasive, the compacts, drying, roasting and dressing made with a lot of holes, with

the cutting of abrasive grit. Abrasive grains exposed on the surface portion of its corners as cutting edges. Divided into: ceramic grinding wheel (silicon carbide,

corundum, corundum, etc.) and ceramic superhard grinding wheel (vitrified diamond grinding wheels and vitrified CBN grinding wheel) two categories.
Advantages 1, grinding efficiency; 2, with high wear resistance (abrasion resistance wheel, abrasive consumption, particularly in the grinding of hard brittle

workpiece very obvious); 3, grinding force is small, low grinding temperature; 4, grinding of the workpiece, high precision, good surface quality of the workpiece to

maintain good shape. Therefore, vitrified diamond grinding wheel in diamonds, industrial ceramics, PDC, polycrystalline diamond, diamond tools, CBN, carbide high-

brittle materials and some special materials grinding, with more and more obvious advantages, the development of the diamond abrasive has a good prospect. Is

considered to be high-speed, high efficiency, high precision, low grinding cost, low environmental pollution, high-performance abrasive, with more and more widely

used, is the recent world competing tools for grinding hot research and development. Property mainly by the abrasive characteristics of the wheel, size, binders,

hardness, structure, and other factors determined shape and size. In superhard grinding wheel hardness and organizations are generally neglects to mention. Abrasive

grinding wheel is the main raw material manufacturing, cutting directly responsible work. . Diamond: common materials suitable for processing high wheel hard to

process hard brittle metal and nonmetal materials. Such as cemented carbide, optical glass, ceramics, stone, and other semiconductor materials. Particle size refers to

the size of the abrasive particles, the size of a particle numerals.
GB provides two kinds of abrasive powder particle size and number. Generally speaking, use coarse abrasive coarse (size number smaller), abrasive grinding to a smaller

(larger particle number); powder used for grinding and other precision machining and ultra-precision machining. Particle size range of ceramic diamond wheel generally

w1.5 ~ 80/100 The role of binding agent binding agent is bonded abrasive having a given strength and shape of the wheel. Wheel strength, impact resistance, heat

resistance and corrosion resistance, depending on the binding agent performance. The binding agents are used vitrified (V), the resin binding agent (B), the rubber

binding agent (R) and the metal binding agent (M) and so on. Vitrified bond: the most widely applicable to cylindrical, round, flat, centerless grinding and profile

grinding wheel, etc.; resin bond: for cutting and slotted sheet wheel and high-speed grinding wheel; rubber combined agent: guide wheel for centerless grinding,

polishing wheel; metal bond: for diamond grinding wheel. Shapes and sizes depending on the machine type and processing needs, the grinding wheel made from a variety of

standard shapes and sizes. Details can be found Abrasives Standard Development Status To address these issues, science and technology workers have been studied in many

ways, including low-temperature performance of vitrified ceramic adhesives that affect the quality and development of diamond wheel memory key factor. Therefore, the

study of high strength, low-temperature, low thermal expansion coefficient and excellent performance of low-temperature ceramic adhesive is home superhard materials

ceramic grinding research. Tanaka T, Esaki S, Nishida K, etc., by selectively to increase the wheel the number and size of pores, the hard material can be self-

sharpening wheel set times has been further improved. Jackson MJ, Barlow N, Mills B superhard materials ceramic grinding wheel by controlling the pore structure, so

that the production of grinding wheels with high bond strength, have a good time grinding grinding efficiency and cooling performance. By thermal mechanical analysis,

Raman spectroscopy and other means, Kuan-Hong Lin, Shih-Feng Peng, Shun-Tiab Lin on the sintering temperature, sintering atmosphere, sintering time on superhard

materials ceramic diamond grinding wheel firing shrinkage and burning of conduct studied, and studied the vitrified diamond grinding wheel sintering parameters and

characteristics. Russian scholars selected ceramic binder formulations superhard materials mainly chemical composition ratio, select borosilicate glass or boron lead

glass system as a theoretical study. Lead glass binder also conducted more in-depth study, but lead is a toxic substance, high temperatures break down easily. Back in

the 1990s, Japanese researchers studied vitrified diamond grinding wheel and efficient high-precision grinding, grinding wheel concentration, abrasive requirements

selection requirements. Of Na2O-B2O3-SiO2 as the principal component system borosilicate glass superhard material bonded grinding wheel grinding performance; ceramic

binder formulations mainly in chemical composition to the ratio, select lead borosilicate glass or boron glass system as the Theoretical study.
  The foreign study, vitrified Toughening began studies, such as binding agents for glass, ceramics processing phases, adding appropriate amount of a suitable binding

agent whiskers. They found that boric acid binding agent silicon whiskers, one can suppress the formation of cristobalite, cristobalite prevent the 100 ° C ~ 200 ° C

due to the rapid expansion of the volume leaving the grinding cracks; other aluminum borate whisker its effect can play a whisker reinforced, thereby enhancing the

tensile strength of the binder. Because vitrified bond diamond abrasive when combined with the difficulty coefficient is relatively large and other factors, vitrified

bond diamond wheel development and production has been hampered. Research vitrified diamond research in several ways [1], low temperature, high-strength, low thermal

expansion coefficient of vitrified research; [2] vitrified performance improvement research; [3] with diamond grit vitrified Wetting between research; [4] diamond

abrasive surface modification; [5] wheel structure to improve research; [6] wheel optimum process parameters studied; [7] the best way grinding process parameters and

grinding of research. Ceramic diamond grinding wheel widely used application on the wafer (semiconductor wafers and solar wafers), PDC, polycrystalline diamond,

diamond tools, cubic boron nitride , tungsten steel (alloy), new engineering structural ceramics, precious stones, crystal, rare earth materials (magnetic) contour

machining hard and brittle materials, and achieved good economic benefits. Vitrified diamond grinding wheel is mainly used for: PCD, CVD, PCBN, carbide, ceramic knives

and other cubic boron nitride milling cutters, drills, reamers and other cutting tools, grinding and grinding low damage quickly and efficiently.