Hemburg Mikroturn series horizontal turning center

Hemburg Mikroturn series horizontal turning center Hembrug has developed and manufactured hydrostatic ultra precision turning machines for over 45 years. As turning specialists we are well known for product innovation and customized solutions in the field of hard turning. The strength of the organization lies in dedicated engineering, expertise in electronics, pneumatics and oil hydrostatics as well as the commitment of our employees. Hembrug designed and built the first ultra precision turning machine with hydrostatic bearings 45 years ago. The application was aluminium memory discs that needed a smooth surface finish. This machine for diamond turning had superior static and dynamic stiffness and thermal stability. As from the introduction of CBN cutting tools, Hembrug started the investigation of finish hard turning within sub micron tolerances on a Mikroturn machine. Our machine concept proved right and a new product/ market opportunity was created. Finish hard turning has evolved into a simple, reliable and innovative process and is increasingly gaining ground at the cost of grinding technology. With Hembrug finish hard turning technology many costly and time-consuming cylindrical grinding operations can be easily replaced, without losing part quality. In 1679 the Dutch government founded the Ordnance factory 1989 was the start of the development of finish hard turning Artillery Inrichtingen for the production of ammunition. within submicron tolerances on the Mikroturn series. This started producing machine tools which they required for their sulted in the development of the Mikroturn 100 designed to own production. started selling machine tools to 3rd parties machine medium-sized workpieces in 1994. The Mikroturn 100 under the Hembrug name. More than 10,000 machines have series is still being sold worldwide today. been supplied worldwide since then. The company started the development of a turning machine with In 1999 the first Vertical Mikroturn was introduced to machine hydrostatic bearings under the registered name Mikroturn . First ardened parts up to ø 1,000 mm. In 2004 we designed a application: computer memory disc that needed a very smooth 4-axis version allowing a cycle time reduction of up to 40 . surface finish. In 1982 Hembrug was privatized and decided to The horizontal Mikroturn Twin spindle, introduced in 2011, focus completely on the development, assembly and marketing allows cycle-time improvements of up to 30 and production of precision lathes. improvements up to 100 when compared to single spindle lathes. Mikroturn 500 XL large and heavy parts and Mikro- turn 200L long shafts have been successfully introduced to serve specific customer needs. Achieved tolerances in hardened steel 68 HRC and up to Ø 1,500 mm Surface finish tolerances Ra: - μm Shape accuracies: μm Dimensional accuracies: 2 μm Cost saving Narrow tolerances Multiple operations can be done in one set-up which Finish hard turning allows machining of parts in one set up eliminates the need for a multi-step grinding process that resulting in narrow tolerances especially for concentricity, historically would involve two or three separate operations. One squareness and roundness. turning machine performs all the operations. More flexibility Environmental friendly With a single point standard CBN tool and clamping set-up a Hard turning is a dry and environmental green process due to wide variety of parts with different contours and sizes can be the absence of grinding fluids and grinding sludge. machined. This provides more flexibility in production environ- ments and reduces changeover time. Higher productivity Finish hard turning ensures more material removal per machining cycle than grinding. This makes hard turning up to 3 to 4 times faster over cylindrical grinding. Diameter variation chart in Micron Finish hard turning of cylindrical rollers, 2 , E Size: 52 x 80 mm, Material: 100Cr6, Hardness: 60 HRC, Stock: mm. An acceptance test of 25 parts shows a diameter variation within mm Size min. 52,006 mm Size max. 52,009 mm Roundness error Flatness face Run-out face Surface finish Ra Faces Automotive parts Tools, molds Bearing Parts Hydraulic parts Roller bearings Ball screw Foto s: Schaeffler AG In order to safeguard the flawless functioning of the London Eye and Great Beijing Wheel first-class bearing components are implemented. The rollers have all been hard turned on hydrostatic Mikroturn finish hard turning machines.

Hydrostatics for the main spindle and guideways High accuracy of precision parts can only be achieved with Due to the absence of metal contact and thus wear the suitable machine concepts. Besides the tooling system and Hembrug main spindles have, in principle, an infinite life. The machine base, a superb static and dynamic stiffness of the main chart shows a run-out of the main spindle of micro at spindle and guideways is required. 3,200 rpm. This run-out accuracy was measured on a 17-year Hydrostatic system Hembrug Mikroturn series Super-Mikroturn. Hembrug main spindles specified superior conventional bearing system significant advantages. New continuous oil film entire length guideways bearing elements provides excellent damping properties high static dynamic stiffness. Absence metal contact wear ensures long reliable machine life low operational costs. Temperature controlled oil flow guarantees thermal stability. Absence stick-slip effect smallest incremental steps microns possible. Vertical-Mikroturn 1500 V4 Hydrostatic Z-slide μm repeatability Hydrostatic W-slide μm repeatability Automatic Tool Changer optional Natural granite machine base Hydrostatic rotary table run-out μm Natural granite machine base High resolution. Cutting hardened steel parts high process forces generated. Natural granite selected base material. Natural granite offers higher stiffness polymer concrete materials. Corrosion stress-free low thermal expansion coefficient superior thermal stability. Natural granite machine base isolated shop floor vibration dam linear circular interpolation. Thermal stability machine guaranteed constant oil flow temperature kept 20 degrees Celsius. Engineering focus today future demands. Hembrug engineers developed hundreds applications company possesses wealth knowledge part holding, programming, selection tools cutting process particular. Every day new applications added. Through customized training let become familiar machine walk step step hard turning process. Ensures machine installation always capable getting full potential machine advantages hard turning process offer. addition customized training courses Hembrug also offers basic training courses. All training courses organized Hembrug application centre Haarlem. Hembrug Sales Service Made close customer Netherlands. Offering full service package Hembrug aims support customer transport, commissioning, process development, operator, programmer, maintenance training long term supply spare parts sales service. Also inquire possibilities retrofit older machines. Hembrug Mikroturn Horizontal series Specifications Base Line 100 200 L 500 XL Twin Max. turning diameter Max. turning length Repeatability guideways Rapid traverse rate Max. feed rate CNC resolution Positioning accuracy  Hembrug Mikroturn Vertical series Specifications Max. turning diameter Max. turning length Max. workpiece weight incl. chuck Max. spindle speed Nominal torque Run-out main spindle / rotary table Z-Axis travel Repeatability guideways μm Represented by: Hembrug Machine Tools H. Figeeweg BJ Haarlem Box The hard turning company 2001 HA Haarlem HEMBRUG The Netherlands MACHINE TOOLS