Motors & Drives Information

Chains were probably conceived as early as the 15th century, when Leonardo da Vinci produced a series of sketches illustrating the basic principle. Some of the drawings closely resemble the actual form of modern day roller chain. However, like so many of Leonardo's ideas that were ahead of their time, it wasn't until much later - the late 19th century when bicycles became popular - that chains really started to be used on a large scale.

The amalgamation of Reinecker, Karstens and Kopp combines thegrinding know-how of the Emag Group under a single roof. Each ofthe three companies can tap into many decades of in-depthexperience in the manufacture of grinding machines and theapplication of its technology. This collective experience hasleft its distinguishing mark on the new design platform, whichallows for a number of machine variants to be configured strictlyin accordance with individual customer requirements.

The machinesprovided by the Emag Grinding Group cover everything from thegrinding of prototypes to the production grinding of largebatches of small or large, long or short shaft-type componentsexternally (know-how Karstens), and from the internal andexternal grinding of high-precision chucked components (know-howReinecker) to the grinding of cams and camshafts (know-how Kopp).To a large extent, the basic machines - even for very differentmanufacturing tasks - are identical, with all the advantages thisbrings the user: standardised operation, programming andmaintenance, resulting in a shorter learning curve and lowermaintenance costs.

It makes the use of available personnel moreflexible and easier to plan, and allows for multiple-machineoperation.

The machineis based on the new design platform (Figs.

4061, 4054) forgrinding lengths of max.

3000mm and grinding wheel diameters ofmax.

610mm (standard version).

The type 204 F is designed for thegrinding of chucked components of max.

400mm dia.

Grinding asfinish machining process - today and tomorrow - qualityrequirements, for ground components in particular, are increasingsteadily.

At the same time, the integrity of the processcapability is becoming the main criterion in volume productiongrinding.

Values of Cpk 1.67 / Cpk 2.0 are a reality.

Otherimportant objectives of production planning today are short,flexible production sequences.

Short retooling times must beachieved, to ensure that component manufacturing costs do notrise despite a steadily increasing workpiece diversity and theshrinking of batch sizes.

In addition to that, different batchsizes and workpiece contours require different automationconcepts.

The machining result depends, to a large extent, onchoosing the correct grinding tool.

Modern machine designs haveto take into account the demands made by different grinding wheelabrasives.

This applies to coolants too, which are of equallyfundamental importance to the machining results.

Although, in thepast, machine manufacturers (and frequently also the machineuser) have paid little attention to these matters, it isimperative that all future machine designs thoroughly addressthem.

The new modular design for cylindrical grinding - in the HGseries of machines from Reinecker Karstens Kopp the newgeneration of horizontal grinding machines from the Emag GrindingGroup takes account of all the demands made on modern cylindricalgrinders.

The basic assemblies, such as spindles, measuringdevices and drives are manufactured in large numbers within theGroup and assembled into working entities of modular design.

# posted by Medical Information : 1:55 AM