MANUFACTURING TECHNOLOGY
National Machinery extends machine warranty
National Machinery LLC’s world-wide operations has announced that is has increased the warranty period on its FORMAX®
warranty. The new warranty programme, which is effective now, applies to FORMAX® including the newest members LeanFX and PumaFX.
is already the highest quality standard in the industry” says Tom Hay, executive vice president engineering technology, quality and new products. The FORMAX®
N I product line includes machines
that can form a wide range of specialty parts and fasteners at net shape while running at exceptional forming speeds. National enforces a global quality policy that includes material
testing, a machine design created for performance and longevity, expert technical personnel, safety analysis, and a thorough final machine run-off test period.
ational specialises in the design, development, and manufacture of cold forming machinery and applications to produce metal parts and fasteners. “The increased warranty programme supports what
machine product to a two year machine warranty with a five year drivetrain machines
Tom Hay adds: “The extended warranty is a bold step punctuating our confidence with the performance and reliability of these machines and National’s continuous improvement processes. We want to make sure customers know that no matter what type of FORMAX®
, from our Large FX and Plus
models all the way through to our new LeanFX and PumaFX models, we ensure the same calibre of quality.” National’s current products focus on advanced cold forming machinery, process and tooling technology, aftermarket parts and service, and used machinery. The company is headquartered in Tiffin, Ohio, with service centres in Germany, Japan, China and sales offices all over the world.
The best of both worlds – servo drives for flat-die thread rolling machines
EWMenn GmbH focuses on an innovative and energy efficient drive concept.
t is no coincidence that servo drives have increasingly become the first choice for manufacturers of industrial production machines. Simply speaking, they combine the advantage of a conventional AC motor with the positive features of a hi-torque motor without adopting their weaknesses. Servomotors are as maintenance free as AC motors and do not require external, often expensive, cooling. They also offer high torque, efficiency and precise positioning capability.
Incorporating a servomotor into a machine’s design allows the machine builder to utilise the positive characteristics of an AC
motor drive by, for example, allowing the use of a flywheel for energy storage where the flywheel serves to store kinetic energy. EWMenn high-speed thread rollers use this energy to handle load peaks typical to the thread rolling process by using energy from the flywheel instead of the main motor.
Clear efficiency advantages Unlike a hi-torque motor a servo drive combined with a flywheel system offers very
high forming power while using comparatively little motor power. Hi-torque motors alone usually do not achieve significant increases in forming power since they are often missing the flywheel for energy storage. This results in the need for much higher main motor ratings (up to 100%) than required for a servomotor in combination with a flywheel system. Therefore, the later allows much more energy efficient production.
Precise and energy efficient drives with a concept Servo drives are not only convincing through their precise positioning capabilities but also through their energy efficiency. EWMenn uses this technology in the company’s concept for building thread-rolling machines with high energy efficiency. This concept focuses on creating controlled drives designed to specific purpose that are then combined with electronic management for main and auxiliary drives to make the most intelligent use of energy. On a parallel basis only highly efficient motor and transmission components are utilised. This concept includes a flywheel system for energy storage. The stored kinetic energy is used to cover load peaks. For high forming loads the EWMenn concept is very advantageous since it offers high torque and forming power without requiring external cooling. “Besides energy savings this drive concept also offers easy operation and comfortable setup using an electronic handwheel,” states Ernst W. Menn, president of EWMenn. Servo drives are available for all EWMenn thread rolling machines.
84 Fastener + Fixing Magazine • Issue 72 November 2011
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