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A Ugust Nell © August Nell jr. August Machines for Strip Grinding and Polishing August Nell jr.© Heinz Berger Maschinenfabrik GmbH & Co. KG Kohlfurther Brücke 69 42349 Wuppertal Deutschland Tel.: +49 202 24742-0 Fax: +49 202 24742-42 [email protected] www.nell.de Table of The plant page 4–5 Contents The Nell system page 6 The modular system page 7 BSM3000-CNC/D and /E page 8–11 Straight finish grinding, scalloped and serrated edge grinding BSM3000-CNC/C page 12 Straight, scalloped edge grinding BSM3000/Sp page 13 Brushing and deburring BSM3000-CNC/P page 14–15 Polishing and deburring BGM1500-CNC/E and /D page 16–17 Straight finish grinding, scalloped and serrated edge grinding BSM1500-CNC/TT and /TTGB page 18–19 Straight micro grinding and gothic arch DEB1500-CNC page 20–21 Grinding and polishing of double-sided razor blades BSM1000-CNC/E page 22 Scalloped and serrated edge grinding BWSL1000-CNC/E page 23 Straight finish grinding, scalloped and serrated edge grinding BSM500-CNC/HK page 24 Plunge grinding and polishing Dressing Systems page 25 Breakers page 26–27 Spooling Systems page 28 Magazine Systems page 29 Camera / Laser Measuring page 30 Accessories page 31 • 2 • Workpieces • Blades for the food industry • Household knives • Razor blades • Saw blades • Scalpels • Steel rules • Surgical blades • Technical blades Industries • Food industry • Household goods • Printing and paper industry • Razor blade industry • Saw blade industry • Surgical industry • Tooling industry • 3 • August Nell jr. GmbH • 4 • The Plant Single work stations and system components are configured into a complete system. The Nell modular system offers solutions which have been tailor-made to each customer’s requirements. Retooling to add additional system components and/or work stations is possible. • 5 • The Nell System Founded in Solingen in 1920, the company specializes in precision grinding machines for micro grinding coil material, which is guided on edge through the work stations. The stock is machined either coil-to-coil or coil-to- breaker unit. The coil material is machined from split stock or edge trimmed stock, previously machined on Julius machines. The machines are configured as 1- or 2-sided grinding stations with tooling, e.g. grinding wheels, positioned at an angle similar to a butterfly’s wings. The angle spread between the stations can be adjusted by mo- tor from 0 to 35°, depending upon application and configuration. The stock is fed into the machine so that the cutting angle remains constant. Grinding wheel wear is com- pensated for by feeding the wheel slide unit over pre- cision guideways via ballscrew and AC servomotor. The feed values can be calculated using camera or laser measuring technology. The use of various tools enable coil grinding, honing, and polishing. In close consultation with the customer and by im- plementing the latest technology, Nell provides state-of-the-art solutions which are tailor-made for each customer's application. • 6 • The Modular System Thanks to Nell’s well-thought-out modular system, complex coil grinding and polishing tasks can be quickly and cost-effectively accomplished with stan- dard modules. After delivery, system components can also be expanded or provided by the customer. The individual modules are described below: Series BSM Series BGM Series DEB Series BWSL The belt grinding and polishing lines can be equipped with different dressing systems, breaking machines, spooling systems, magazine systems, camera and laser measuring systems and other accessories. BSM3000-CNC/E and /D Straight Finish Grinding, Scalloped and Serrated Edge Grinding Grinding machines from the BSM3000-CNC series are either configured as 1-sided (BSM3000-CNC/E) or 2-sided stations (BSM3000-CNC/D). • Main motor: 15 kW or 2 x 15 kW • Frequency converter: 18.5 kW for programmable, con- stant peripheral velocity • Peripheral velocity: 30–50 m/sec • Motorized angle adjustment: 0–35° with butterfly wings • Grinding wheel diameter: max. 300 mm (11.81") • Wheel / grinding width: max. 300 mm (11.81") • 2-sided precision spindle bearing • Cutting speed: max. 50 m/sec (1968.51"/s) • Central lubrication • Configured for wet machining with grinding emulsion • Guideways are solid carbide or with carbide inserts • Various dressing systems available for grinding wheel profiles • 8 • BSM3000-CNC/E and /D BSM3000-CNC/E One-Sided The one-sided grinding station is used to grind pencil Machining sharpener blades, abrasor strips and machine blades. • Grinding wheels with 300 mm diameter mounted on precision spindles with two-sided bearings • Grinding wheel width max. 300 mm (11.81") • Employed e. g. for pre-grinding coils where large amounts of material have to be removed from one side BSM3000-CNC/E – straight finish grinding of blades for the production of abrasors BSM3000-CNC/E – serrated grinding BSM3000-CNC/E – scalloped grinding BSM3000-CNC/E – straight finish BSM3000-CNC/E – straight finish for the production of doctor blades by for the production of machine knives grinding of blades for the production grinding of blades for the production using a CBN grinding wheel by means of a profiled grinding wheel of industrial blades of pencil sharpener blades • 10 • BSM3000-CNC/E BSM3000-CNC/D The double-sided grinding station machines techni- cal blades, doctor blades, surgical blades and similar workpieces. Double-Sided • Two grinding wheels configured on opposite sides Machining • Each spindle can be equipped with 6 grinding wheels, having widths of 20 mm (0.79") each, which are offset for plunging. • This results in a grinding width of 120 mm per side, for a total width of 240 mm (9.45"). • Employed for finish grinding pre-ground or edge trimmed coils (grit 150–320) BSM3000-CNC/D – Straight blade grinding for the production of industrial blades BSM3000-CNC/D – Straight blade grinding for the production of doctor blades BSM3000-CNC/D – Straight blade grinding for the production of scalpel baldes BSM3000-CNC/D • 11 • BSM3000-CNC/C Straight, Scalloped Grinding The BSM3000-CNC/C work station is designed for grinding of kitchen knives and similar workpieces. • Main motor: 22 kW • Frequency converter: 30 kW for pro- grammable peripheral velocity • Motorized angle adjustment: 0°– 35° • Designed for one-sided removal of large • Grinding wheel diameter: 350–450 mm amounts of material from coils (13.78"–17,72") • Use of cup wheels, 350–450 mm (13.78"–17.72") in diameter • Wheel width: 10–100 mm (0.39"–3.94") • Pre-embossed coils can also be scallop ground • Cutting speed: max. 50 m/s (1968.52"/s • Grinding wheel wear compensation with camera • Central lubrication or ultrasonic technology • Configured for wet machining with grinding emulsion • Guideways are solid carbide or with carbide inserts • 12 • BSM3000-CNC/C BSM3000/Sp Brushing and Deburring The brushing and deburring station BSM3000/Sp machines hair clipper blades, doctor blades, serrated machine cutting tools for food industry and similar workpieces. It is designed as a spiral brushing station with two spindle bearings installed at a radial arm each. • Main motors: 1,1 kW with tooth belt gear • Frequency converter for continuously adjustable regulation of spindle revolution • Pneumatic synchronized lifting of the brushes and releasing of strip clamping for indexing strip feed • Angle correction by mechanical adjustment of the height • Compensation of the brush wear by mechanical adjustment of the impact • Configured for wet machining BSM3000-CNC/ FPV BSM3000-CNC/P Polishing and Deburring The polishing station BSM3000-CNC/P is designed for polishing and deburring of microgrinded blades such as doctor blades, scalpels, technical blades, pencil sharpener blades and similar workpieces. • Configured as a double-sided polishing station for polishing tools up to 250 mm diameter • The polishing result can be influenced by feeding liquid paste through high-pressure nozzles • A consistent polishing result is achieved by means of an intelligent pressure control for the polishing tools and constant motor power • 14 • BSM3000-CNC/P • Main motor: 1 kW • Frequency converter: 1,5 kW for programmable, constant peripheral velocity with decreasing wheel diameter, • Peripheral velocity: 6–14 m/s (236.22"–5315"/s) • Motorized angle adjustment: 2°–35° with butterfly wings • Max. strip height: 50 mm (1.97"), alternatively: 100 mm (3.94") • Polishing wheel diameter: 175 mm (6.89") • Scallop configuration, e.g. with 12 polishing wheels, each 5 mm (0.2") in diameter, i.e. total of up to 24 polishing wheels per station • Two-sided spindle bearing • Dressing of the polishing wheels by means of an indexing grinding belt BGM1500-CNC/E and /D Straight Blade Grinding, Scalloped Grinding, The grinding machines of the series BGM1500- Serrated Grinding CNC are designed to grind doctor blades, knives for the food industry and similar workpieces. • Grinding machines of the series BGM are de- signed as one-sided (E) or double-sided (D) strip grinding stations • Strip height: more than 50 mm (1.97") possible • Grinding wheel diameter: 400 mm (15.75") • Width of the grinding wheel: 150 mm (5.91") • Stations applicable for continuous grinding as well as plunge grinding for scallopped and serrated grinding • Dressing system (p. 25) and accessories (p. 31) • Main motor: 15 kW • Frequency converter: 18,5 kW • Motor angle adjustment: 4°–25° • Grinding wheel diameter: 400 mm (15.75") • Grinding wheel width/grinding width: max. 150 mm (5.91") • Double-sided precision spindle bearing • Cutting speed: max. 40 m/s (1574.82"/s) • Central lubrication •
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