Diskus Werke AG

DVS TECHNOLOGY GROUP from 18th to 23rd September 2017 at EMO in Hannover: DVS is exhibiting metal-cutting solutions for the drives of today and tomorrow

DVS TECHNOLOGY GROUP at EMO 2017

The EMO fair booth of DVS TECHNOLOGY GROUP in Hall 17, Booth C46, will be focusing on the high-precision machining of components for powertrains of today and tomorrow. The company group will be presenting a total of three new machine platforms, a new face grinding technology and numerous innovations from the machine and tool segment at this year's EMO in Hanover.

The DVS-Companies exhibit the following innovations at EMO:

BUDERUS Schleiftechnik BUDERUS BV 235 platform for hard machining and finishing celebrates its world première
BUDERUS Schleiftechnik is integrating borehole honing into its technology portfolio
BUDERUS Schleiftechnik is integrating borehole honing into its technology portfolio

BUDERUS Schleiftechnik GmbH will be presenting the trade public in Hanover with an innovation combining the best of two machine worlds in the form of the new machine platform BV 235. An enhanced modularity has resulted from the merging of the special design and technology features of the machine platforms CNC235 and DVS ModuLine. The increased demands made by customers on tool shapes and finishes can thus be implemented with combined machining processes, optimised in terms of cycle times and in reliable processes. This is also why BUDERUS Schleiftechnik has integrated the technology of borehole honing into the process chain at grinding and turning operations within the context of combined hard machining and finishing in one machine.

DISKUS WERKE Schleiftechnik New face grinding technology DISKUS DDG
Diskus Defined Grinding: A new face grinding technology for defined material removal on shouldered faces
Diskus Defined Grinding: A new face grinding technology for defined material removal on shouldered faces

DISKUS WERKE Schleiftechnik GmbH is introducing the face grinding technology DDG – Diskus Defined Grinding – at the world's leading trade fair. This new technology permits users to precisely define material removal on shouldered and non-shouldered faces. The technology is being used on the new machine platform DFine. This way, the interaction between machinery and technology opens up a host of new possibilities in terms of the perpendicularity of machined faces to reference diameters. In the same way, defined axial step dimensions of shouldered faces can be ground on one or two sides. An adjustment option on the workpiece carrier allows flat surfaces to be ground either concave or crowned. The micrograph can also be specifically influenced. With a footprint of only 3 m², the DFine is extremely compact and can be concatenated or automated easily and at low cost by means of a belt feeder.

PITTLER T&S New PITTLER skiving centre with automation cell
PITTLER T&S: Gear cutting using the highly productive power skiving method
PITTLER T&S: Gear cutting using the highly productive power skiving method

For the EMO, PITTLER T&S GmbH will be offering the first skiving centre of its kind including automation cell for the complete machining of larger components with a diameter of up to 400 mm. Based on the tried and trusted PITTLER vertical series, the new platform has been oriented towards the advanced PITTLER Power Skiving gearing technology, which can be used for both the internal and external gear cutting of components. Components such as the hollow wheels of the planetary gearbox which will be installed more and more often in drives in the future can either be machined completely with one clamping or be machined by upstream or downstream turning, milling or deburring processes in addition to gear cutting. The PITTLER skiving centre has also been optimised for fully automatic series production: The work chambers of up to two gear centres are automatically supplied with tools via an innovative automation cell, thus minimising space and investment requirements compared with robot loading. This allows manufacturers to react economically to varying batch sizes, which is not possible with sequential machining on several machines.

PRÄWEMA Antriebstechnik Hard Skiving and Internal Honing
PRÄWEMA internal honing: Pioneering development for the surface quality of hardened internal gearings
PRÄWEMA internal honing: Pioneering development for the surface quality of hardened internal gearings

All there is to know about the gear honing of transmission components will be demonstrated by PRÄWEMA Antriebstechnik GmbH at the DVS booth. Experts within the branch are predicting that the quality of gearing will have to be optimised even further in terms of load-bearing capacity and NVH-behaviour in view of the development of electric drives and the higher rotation speeds to be expected. PRÄWEMA offers complete gearing solutions from soft to hard machining and finishing both for internal and external gearing. For the gear cutting of hardened passenger car transmission components with an average quality requirement, PRÄWEMA is highlighting hard skiving for series production at the EMO. For internal gearing with significantly higher quality requirements, the Eschwege-based company has further developed the technology of internal honing. For the first time, hardened and thus more stable gearing in terms of pitch values and surface structure have been able to be significantly optimised as a result. For direct comparison and in order to illustrate the modularity of the SynchroSkiver machine series, PRÄWEMA is demonstrating both methods in one work chamber at the EMO. The global market leader for gear honing machines is also using the EMO to present new developments for outer gearing. VarioCrossHoning – a special oscillation method during honing – makes it possible to reduce surface roughness even further and thus further increase the surface quality of components with external gearing. The method can be marvelled at for the first time at the EMO together with the new, larger honing head with a diameter of 400 mm for components with a maximum diameter of 220 mm.

Werkzeugmaschinenbau Ziegenhain WMZ-Solution for complete soft machining of motor shafts of electric drives
WMZ is demonstrating its Power Skiving gearing technology on an E-drive shaft
WMZ is demonstrating its Power Skiving gearing technology on an E-drive shaft

Within the DVS TECHNOLOGY GROUP, one company is dedicated to the complete machining of shaft components – Werkzeugmaschinenbau Ziegenhain GmbH or WMZ for short. At the EMO, the focus of the WMZ exhibits will be on the machining of components for alternative drives: the motor shaft of an electric drive will be soft turned, milled, drilled and geared using the power skiving method on an H200 machine live at the fair. With this technology combination, WMZ is primarily addressing production companies with medium-sized series for the electric vehicle industry.

The DVS UGrind on show at the fair booth can carry out the hard machining and finishing of small to medium-sized series of identical components precisely and in a reliable process. Faces and plunge cuts are made using hard turning. Outer diameter, sealing and key surfaces are ground with high precision. Then a specially integrated honing unit finishes the bearing seat of the hollow shaft, achieving a surface roughness of Rz < 2.5 µm. The key feature of the machine is the flexible multi-functional head which has an activity radius of 270°. Through this head, all tools as well as a precise measuring sensor are used with short travel and a high efficiency factor.

NAXOS-DISKUS Schleifmittelwerke AIRMENTO: New CBN-bonding for double face grinding
CBN face grinding of an engine block
CBN face grinding of an engine block

NAXOS-DISKUS Schleifmittelwerke GmbH will also have several innovations on display at the booth. The company is presenting the new AIRMENTO bonding for cold-pressed CBN grinding discs for double-sided face grinding. The newly developed bonding stands out thanks to its optimised bonding strength, temperature resistance and enhanced damping behaviour during grinding. Correspondingly longer tool service lives, improved conditioning ability as well as higher supply and feed rates for optimised material removal rates are the result.

DVS TOOLING Pioneering tool solutions for PRÄWEMA gear honing
Diamond dressing gear wheels from DVS TOOLING
Diamond dressing gear wheels from DVS TOOLING

DVS TOOLING GmbH will be presenting a comprehensive spectrum of tools for PRÄWEMA gear honing for both internal and external gearing in Hanover. The dressing tool VSD SF is new in the range. In this case, the letters SF stand for "Superfinishing" and refer to the extremely good surface quality. To do justice to these requirements in series production as well, the tools used must be coordinated accordingly. With the VSD SF, DVS TOOLING has managed not only to offer tools with extremely tight production tolerances, but also surfaces of Rz < 1 µm for external gearing. A further DVS TOOLING highlight for the EMO will be the diamond dressing gear wheels which the company finishes using its own DVS LaserCut method at its base in Hemer near Dortmund. The diamond wheels from DVS TOOLING GmbH thus stand out with great cutting properties, excellent pitch quality and a long service life.

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