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CBN & Diamond Grinding Wheels

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CBN & Diamond Grinding Wheels 1 CBN & Diamond Grinding Wheels 2 3 Contents 4 6 24 About the CBN and Diamond For company Grinding Wheels users NAXOS-DISKUS Diamond and Application form Schleifmittelwerke GmbH Cubic Boron Nitride Technical information The DVS TECHNOLOGY GROUP Application-specific development at NAXOS-DISKUS Grinding wheel construction The key component: AUMENTO bonding Technical specification 4 5 About the company NAXOS-DISKUS NAXOS-DISKUS Schleifmittelwerke the extensive experience of the The The DVS TECHNOLOGY GROUP is With a unique combination of GmbH was founded as NAXOS- DVS mechanical engineering and made up of Germany-based compa- machining technologies, tooling Schleifmittelwerke UNION in Frankfurt in 1871, and production companies, a fact which DVS TECHNOLOGY nies focusing on the turning, gear innovation and production experi- cutting, grinding and gear honing ence for the machining of vehicle manufactures precision grinding GmbH is clearly refl ected in the quality GROUP technologies. Besides engineering powertrain components DVS is one tools for greatly differing applica- and design of the grinding wheels. and manufacturing machine tools as of the leading system suppliers in tions. The product range covers Special products such as mill well as grinding and honing tools, the industry. abrasive wheels for double face wheels, leather polishing rollers, DVS operates two production sites where automotive parts are The DVS TECHNOLOGY GROUP grinding, outer diameter grinding, nurit rollers and bulk abrasives machined in series production has more than 1,000 employees centerless grinding as well as gear supplement the extensive range of exclusively on DVS machines. This worldwide. On key markets like grinding and gear honing, from products. NAXOS-DISKUS is one adds a high degree of production China and the United States DVS the conventional abrasive grit to of the world’s leading grinding know-how to the experience of the supports its clients with their own extremely hard cutting materials tool manufacturers and produces DVS machine tool and tooling staff in service and sales. manufacturers. such as CBN and diamond. vitrifi ed and resin-bonded grinding As a member of the DVS TECHNOLOGY wheels with an outer diameter GROUP, NAXOS-DISKUS can draw on of up to 1,600 mm. 1871 1905 1978 Company founded Production of the fi rst Production of the fi rst vitrifi ed-bonded grinding wheel CBN grinding wheels for crankshaft grinding with vitrifi ed bonding Members of the DVS TECHNOLOGY GROUP 1987 NAXOS Schleifmittelwerke 1910 plant is built in Butzbach Production of the fi rst resin-bonded grinding wheels 2005 Integration in the DVS TECHNOLOGY GROUP 1900 1950 2009 Start of production Focus on diamond Takeover of the “Bonded” of grinding wheels made in research and sector of The Carbo Group GmbH of synthetic corundum development work 6 7 CBN and Diamond Grinding Wheels Diamond and Today’s demands in terms of speed known material after diamond, and precision in the manufacturing is suitable for the grinding of Cubic Boron process are a challenge for the these alloys. machining of highly wear-resistant Nitride (CBN) and low-abrasion materials. Diamond and CBN are superior NAXOS-DISKUS has a wide range to all other materials as far as cut - of tools with diamond and CBN ting edge consistency and wear- to grind amorphous materials or resist ance are concerned. Our CBN alloys containing carbide efficiently. and diamond grinding wheels are produced for performing highest As the hardest material discovered precision grinding operations with thus far, diamond is an ideal grind - exceptionally good reproducibility. ing agent for very hard materials. Specially coated CBN abrasive and However, its transformation back the newly developed vitrified and to carbon makes it unsuitable for resin bonding systems are the basis the grinding of ferrous materials. for the CBN and diamond grinding CBN, which is the second hardest wheels from NAXOS-DISKUS. Application-specific Machine planners are familiar Expert application technicians help with the problem: the use of you to choose the right grinding development standardised grinding wheels is agent for your application, so at NAXOS-DISKUS not always possible when modi- that the advantages of diamond fied, product- specific machines and CBN can be fully exploited. are used. Custom solutions for NAXOS-DISKUS guarantees individual machines are a must! optimisation of your processes CBN and diamond grinding wheels with maximum efficiency. from NAXOS-DISKUS are designed and manufactured exclusively for CBN grinding wheel for the customer-specific use in circular grinding of synchronizer cones on BUDERUS grinding machines. and face grinding applications. 8 9 Grinding Grit types wheel AREAS OF APPLICATION FOR DIAMOND AND CBN TOOLS construction METALS NON-METALS FERROUS NON-FERROUS ANORGANIC ORGANIC METALS METALS MATERIALS MATERIALS Soft Aluminium alloy Cermets Rubber (hard) Non-alloy Copper alloy Ferrites Rubber (soft) Low-alloy Magnesium alloy Glass Wood High-alloy Nickel-based alloy Semi-conductor mat. Plastics Body NAXOS-DISKUS grinding wheels With our vitrified and synthetic Titanium alloy Ceramics Food Hard Carbides Stone are available with a body made resin bonded CBN and diamond Low-alloy of steel, aluminium, aluminium abrasives, we can supply you a High-alloy wrought alloy, synthetic resin, tool to rely on. Chilled cast iron ceramic or carbon fibre laminate. CBN Diamond CBN body variants CBN AND DIAMOND GRIT TYPES DUCTILITY DIAMETER V MAX HEAT MATERIAL C DAMPING WEIGHT COSTS CODE TYPE GRIT SHAPE COLOUR SURFACE IN MM IN M / S EXPANSION (TI) TTI medium- Steel 80 – 750 200 985A CBN black rough blocky medium- Aluminium 50 – 350 63 979A CBN black smooth blocky Aluminium irregular 80 – 700 200 986A CBN to pointed orange wrought alloy rough medium- Synthetic resin 100 – 600 63 984A CBN dark brown very smooth blocky Ceramic 20 – 750 80 972A Diamond blocky black smooth CF laminate 100 – 500 200 973A Diamond cubic yellow rough low high low high 10 11 Grit sizes GRIT SIZE DEPENDS ON APPLICATION AND SURFACE QUALITY SPECIFICATIONS NAXOS CBN FEPA US-MESH SIZE IN µM MICRO GRIT 999A B126 V240 K 11 AUMENTO Concentration 181 80 / 100 180 / 150 600* 40 / 30 Grit type Grit size Hardness Structure Bonding in volume M 40 151 100 / 120 150 / 125 700* 36 / 22 in volume 46 µm 120 A 7 VNX1 126 120 / 140 125 / 106 800* 30 / 20 998A 54 µm 180 B 8 AUMENTO M 25 107 140 / 170 106 / 90 1100* 22 / 12 997A ... ... ... ... AUMENTO pro 91 170 / 200 90 / 75 M 16 1200* 20 / 10 ... 213 µm 420 U 26 76 200 / 230 75 / 63 M 10 1600* 12 / 8 710A 64 230 / 270 63 / 53 M 6,3 3000* 8 / 4 54 270 / 325 53 / 45 46 325 / 400 45 / 35 SPECIFICATIONS NAXOS DIAMOND * Approximately equivalent mesh size 999A D126 C100 K 11 VND1 Concentration Grit type Grit size Hardness Structure Bonding in volume CONCENTRATION IN VOLUME COATINGS 999A 46 µm 25 C 7 Ke 114 DIAMOND CBN 998A 54 µm 50 D 8 ... DENSITY 3.52 g / cm3 DENSITY 3.48 g / cm3 997A ... ... ... ... VND1 C (V %) in ct / cm3 V (V %) in Vol.-% ... 213 µm 200 Q 26 C 25 1,1 V 60 6,25 710A C 50 2,2 V 120 12,5 C 75 3,3 V 180 18,75 C 100 4,4 V 240 25 C 125 5,5 V 300 31,25 C 150 6,6 V 360 37,5 C 175 7,7 V 420 43,75 C 200 8,8 V 480 50 12 13 AUMENTO Pro – Thanks to the further optimised grinding coolant to the grinding stability of Aumento Pro, the contact zone, thus supporting the top performance CBN abrasive grit is bonded very removal of grinding sludge and the tightly into the matrix. This makes grinding temperature. The grinding it possible to reduce the bond forces required are also reduced, hare even further, yet at the thus lowering the grinding pressure same time increase the bonding used in the process. strength of the abrasive grit. In practice, this leads to an The test results clearly prove that additional increase in grinding the process parameters feed and wheel performance. Furthermore, infeed rate were increased by 20 % higher parameters for feed and when the advanced development infeed rates can be realised. Aumento Pro was used compared with Aumento. The resulting Reducing the bond share also reduction in operating time frees increases the pore space, which up more production resources and in turn increases the supply of reduces the costs per workpiece. The key component: Bondings AUMENTO bonding EXPLANATION OF THE NAXOS BONDINGS INTEGRATION TYPE OF BONDING STRENGTH APPLICATION ABILITY BONDING Vitrified Precision grinding, VNX1 Low Medium (vitreous) low to medium load Vitrified Precision grinding, high load AUMENTO High High (vitreous) (crankshaft, camshaft, peel grinding) AUMENTO AUMENTO is a vitrified bond. The AUMENTO PRO also has an even advantage here is that the bonding greater bonding strength. AUMENTO Vitrified Precision grinding, high load share can be reduced in the grinding Very high Very high pro (vitreous) (crankshaft, camshaft, peel grinding) wheel, thus increasing the share of COMPARISON OF DIFFERENT pore space. In turn leading to a TYPES OF BONDING Vitrified Bonding for diamond VND1 High High cooler grinding process. In addition, (vitreous) developed on the basis of AUMENTO tests on a Buderus CNC 235 have 6 shown that significantly higher 5 Synthetic resin bonding for external cylindrical grinding. BNX1 Medium Medium Synthetic resin feeding rates can be achieved for 4 Good damping properties. the plunge grinding of gear shafts 3 without any reduction in workpiece Synthetic resin bonding for face grinding and face finishing. 2 quality, generating cost savings B26 Medium Medium Synthetic resin Very good damping properties with good grit bonding. Precision grinding e.g. for piston rings or pump vanes.
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