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LEISTRITZ Produktionstechnik

Products
LWN 100
LWN 100
Screwing and threading machine
LEISTRITZ Produktionstechnik GmbH
Screwing and threading machines
LWN 100
LWN 100: Perfect for manufacturing EPS screws
At this year‘s EMO, Leistritz Produktionstechnik GmbH will present a machine
novelty from its successful LWN series, amongst others.
Hannover (June 21, 2017) – At the industry’s key event – the EMO 2017 in Hannover –
German‐based Leistritz Produktionstechnik GmbH will introduce the LWN 100, a new machine
specifically for whirling EPS screws. “With this machine we meet the high requirements
of the automotive industry,“ says Klaus Theusner, Managing Director at Leistritz
Produktionstechnik GmbH. “The degree of efficiency and quietness play a very important
role in steering technology. They can only be achieved through highest profile accuracy and
finish quality of EPS screws.“
LWN 100 advantages
The greatest asset of the new and compact LWN 100 is its ability to whirl ready‐to‐install
EPS screws. It achieves very high finish quality which optimally satisfies the latest steering
generation’s demands in terms of torque and noise characteristics. The whirling is a dry
machining process. Not only does it bring enormous cost savings for the purchase and disposal
of coolants and cutting fluids. Additionally, it is eco‐friendly and keeps the working
environment clean.
The combination of a new digital control unit, a dynamic drive and a compact machine design
results in shorter cycle times. Thus, work pieces can be manufactured even more costeffectively.
The new, high‐precision Leistritz whirling machine is therefore particularly adjusted
to the high demands of series production, which in addition to a very good quality
require flexibility and economic processing times.
“The LWN 100 even stands out when it comes to Industry 4.0 features“, says Theusner. “By
using so‐called Smart Software Tools, the machine can easily be operated and integrated.“
  • EPs Spindle
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LWN 120 IW - Internal Whirling
LWN 120 IW - Internal Whirling
Screwing and threading machine
LEISTRITZ Produktionstechnik GmbH
Screwing and threading machines
LWN 120 IW - Internal Whirling
Innovation at the EMO: complete machining of nuts

Designed for the production of complex recirculating ball nuts and other internal threads, Leistritz is presenting a new machine at the EMO which performs complete machining and surpasses standard methods such as hard turning or grinding when it comes to precision and productivity.
The combination of a CNC-controlled internal whirling process with an integrated hard turning method ensures considerably greater productivity during the complete machining of nuts with functional surfaces, as Leistritz will demonstrate at the EMO with the aid of challenging components which were produced on the new LWN 120 IW. This is made possible thanks to a precision-ground carbide plate which already contains the complete profile. As a result, a reproducible profile quality can be achieved, which would otherwise only be possible with a complex grinding process. The key advantage is that as the profile plate is only moved into the workpiece once per thread turn during internal whirling, productivity is also raised by a factor of 3 compared to turning or grinding.
To be specific, the whirling tool with the profile plate moves across the entire workpiece with a maximum length of 800 mm and a diameter of 12 to 200 mm. The high-precision profiling takes place from the workpiece to the oscillator. To generate the cutting speed, the workpiece rotates around the tool at up to 150 rpm. The spindle of the tool itself rotates at 5 to 2,400 rpm and in doing so, oscillates linearly in parallel, so that the profiled cutting plate is always perpendicular to the thread profile. The cutting depth is set via the CNC control system through the machine’s X-axis. In this way, the entire internal profile can be created in a single pass from back to front.
With a Z-axis travel path of 1,100 mm in the horizontal direction and an X-axis stroke of 182 mm, the majority of internal profiles can be created on the new internal whirling machine: in addition to all conceivable thread geometries, ball screw nuts with a lead of 40 mm and a diameter of 40 mm, or a lead of 80 mm with a 40 mm diameter, can be fully machined with the highest geometrical quality in a single production step. In order to completely machine the functional surfaces, the LWN 120 IW also facilitates turning including the machining of plane surfaces, i.e., the face ends of the nuts.
The unique geometry of the ground profile plate actually enables a 100% check to be performed, even if only random checks are made. The new machine for hard whirling of internal profiles also offers a further decisive advantage: it is highly flexible thanks to short set-up and tool changeover times. This also makes the LWN 120 IW a highly interesting option for small batch sizes. Thanks to the dry cutting, there are no costs for cooling lubricants and the short chips can be disposed of inexpensively. To meet customer-specific requirements, Leistritz also offers a modern modular system.


  • Ball screw work piece
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Quality Tools
Quality Tools
Plunge cutting tool
LEISTRITZ Produktionstechnik GmbH
Plunge cutting tools
Quality Tools
Quality Tools - Convincing precision
As a manufacturer of precision tools, we have many decades of experience in designing and producing special tools. We have adapted our delivery range concentrating on both the rotating processing of workpieces (end finishing, profile turning, recess turning, thread cutting and general lathing) and further processing of turning workpieces (work rest blades for centerless grinding).
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