Related Glossary Terms
- computer numerical control ( CNC)
computer numerical control ( CNC)
Microprocessor-based controller dedicated to a machine tool that permits the creation or modification of parts. Programmed numerical control activates the machine’s servos and spindle drives and controls the various machining operations. See DNC, direct numerical control; NC, numerical control.
- cylindrical grinding
Grinding operation in which the workpiece is rotated around a fixed axis while the grinding wheel is fed into the outside surface in controlled relation to the axis of rotation. The workpiece is usually cylindrical, but it may be tapered or curvilinear in profile. See centerless grinding; grinding.
Machining operation in which material is removed from the workpiece by a powered abrasive wheel, stone, belt, paste, sheet, compound, slurry, etc. Takes various forms: surface grinding (creates flat and/or squared surfaces); cylindrical grinding (for external cylindrical and tapered shapes, fillets, undercuts, etc.); centerless grinding; chamfering; thread and form grinding; tool and cutter grinding; offhand grinding; lapping and polishing (grinding with extremely fine grits to create ultrasmooth surfaces); honing; and disc grinding.
- grinding machine
Powers a grinding wheel or other abrasive tool for the purpose of removing metal and finishing workpieces to close tolerances. Provides smooth, square, parallel and accurate workpiece surfaces. When ultrasmooth surfaces and finishes on the order of microns are required, lapping and honing machines (precision grinders that run abrasives with extremely fine, uniform grits) are used. In its “finishing” role, the grinder is perhaps the most widely used machine tool. Various styles are available: bench and pedestal grinders for sharpening lathe bits and drills; surface grinders for producing square, parallel, smooth and accurate parts; cylindrical and centerless grinders; center-hole grinders; form grinders; facemill and endmill grinders; gear-cutting grinders; jig grinders; abrasive belt (backstand, swing-frame, belt-roll) grinders; tool and cutter grinders for sharpening and resharpening cutting tools; carbide grinders; hand-held die grinders; and abrasive cutoff saws.
- modular design ( modular construction)
modular design ( modular construction)
Manufacturing of a product in subassemblies that permits fast and simple replacement of defective assemblies and tailoring of the product for different purposes. See interchangeable parts.
The Junker Group has extended its range of grinding machines: With its new Zema corundum line, the company offers efficient solutions for conventional grinding. Versatile, robust, durable – Junker corundum grinding machines fulfill the requirements of series production for a wide range of different workpieces. The CNC grinding machines grind elements such as flanges and journals on crankshafts, as well as gear, turbocharger and cardan shafts or spray nozzles. In total, the corundum line comprises three models, each of which has different focal points.
The Numerika is designed for the series production of a variety of different workpieces – up to a length of 3.50 meters in the biggest model. The cylindrical grinding machine Kargo takes ultraheavy workpieces, such as shafts for generators or electric motors with weights of up to 6 tons easily in its stride. Rounding off the range are the Flexa corundum grinding machines, which are capable of solving up to three grinding assignments. Whether internal or external grinding and even thread grinding: The modular design of the robust Flexa series makes it suitable for small and medium-sized production runs.
Whether precision parts for vehicle engines or heavy shafts and axles, the machines of the corundum line come with a robust machine bed, hydrostatic guides and grinding spindles mounted on rolling or hydrostatic bearings as standard. A user-friendly control system comes with all the necessary input masks for precision corundum grinding and excellent surface quality.
Designed for integration into production lines, the corundum grinding machines also come with a high level of automation. At the same time, they offer the flexibility needed for grinding workpiece families. Several types of a workpiece family can be stored in the control system, allowing a quick changeover from one workpiece to another in production. To ensure a trouble-free production sequence, the corundum grinding machines are also equipped with automatic loading and unloading systems.
Combining the different types in a single production line from one provider has a range of benefits to offer: Junker customers receive more than simply a grinding machine. The company’s performance promise includes installation of the machine as well as grinding processes ready adjusted to the customer's production requirements. Junker also offers a wide range of services before, during and after machine commissioning.