PRODUCTS TECHNOLOGY FILE SPINDLE BEARINGS FEATURE SENSOR TECHNOLOGY
With the majority of machine tool downtime being traced back to defective spindles, Schaeffler has launched a range of sensors for main spindle monitoring that are integrated into the spindle bearings themselves. The sensor system measures the displacement of
the spindle shaft under load in high resolution and in five spatial directions – three translational and two rotary. This, combined with the matching expertise in rolling bearings, makes the kinematic conditions in the bearing and thus the operation-related parameters such as pressure, spin/roll ratio and cage pocket clearance, to be clearly calculated. The sensor
RECIRCULATING BALL GUIDES FOR AUTOMATION USE
In response to market demand, HepcoMotion has increased stock levels of its HLG recirculating ball guides. Offering such features as smooth low friction movement, high rigidity and an excellent load capacity, this versatile range – which is available in sizes from 15mm to 55mm – is said to be suitable for most automation requirements. The HLG range benefits from ex-stock
availability, as does the company’s Miniature Linear Guide (MLG) range of linear ball guides (5-20mm).
Hepco
www.hepcomotion.com
ring transmits an electrical warning signal to the machine’s control system if the deflections measured on the rolling elements exceed a specific threshold. Of additional benefit, the required algorithms are integrated into the sensor technology meaning the system requires no further components. It is locally functional and transmits an individual warning signal to the machine’s control system, making it suitable for applications such as detecting a crash (collision). The sensor technology is capable of signalling an overload at a digital output within two milliseconds, allowing serious subsequent damage to be minimised or even prevented through fast deactivation of the drive. The displacement measurement using the sensor
ring and the integrated load monitoring has reached the pilot production stage and the first size is now available for customers to test in practical applications.
Schaeffler
www.schaeffler.co.uk
LINEAR SLIDE RANGE OFFERS PRECISE MOVEMENT
If precise, versatile movement in one, two or three dimensions is needed, LG Motion’s UniSlide linear slide is available. This can be used as a manual or motorised unit. With its
rigid dovetail design manufactured in lightweight, high-strength aluminium alloy, the modular UniSlide is corrosion resistant, can withstand impact loads and is non-magnetic. It is suitable for use in vacuum, 10-6
torr. Low friction polymer bearings are fitted to
the slider to ensure maintenance-free life. An application example is turbo fan engine maintenance. For
maximum efficiency of the engine, the gap between the tip of the fan blades and the engine inner surface must be an optimum. However, the blades can come into contact with the inner surface, making the gap excessively large or irregular, so the inner surface of the engine has to be machined out, refitted and reground by hand. To improve this, assemblies have been created which contain customised linear slides from LG Motion. The equipment can be deployed in engines while still mounted on the aircraft, following removal of the blades; and the new inner surface can be machined using the engine rotor while turned manually.
LG Motion
www.lg-motion.co.uk TERMINALS AND SPLICES FOR STEPPER MOTORS
A broad range of terminals and splices for stepper motors are available from TE Connectivity (TE). These, the company explains, can be used in applications such as robotics, machine tools and pick-and-place machines. Three families of closed-barrel products
are available. SOLISTRAND uninsulated terminals and splices use TE’s ‘W’ crimp. Designed for wire sizes from 26 AWG to 600 MCM, these have a voltage rating designed for the recommended wire and are engineered to ensure reliable and long-lasting performance in the most punishing environments.
34 DECEMBER/JANUARY 2018 | DESIGN SOLUTIONS
PLASTI-GRIP insulated terminals and splices use TE’s ‘C’ crimp. These are for wires in the 22 to 2/0 AWG range, have a 600V rating, and are said to answer the need for inexpensive insulated electrical terminations. Also available are the PIDG
types.These are
also insulated and use the ‘C’ crimp, but include metallic sleeves for additional wire insulation support. Designed for complete and uniform reliability in high vibration environments, these are intended for wires in the 26 to 10 AWG range and have a voltage rating of 300V.
TE Connectivity
www.te.com
igus has expanded its range of semi-finished engineering plastic products, enabling the ordering of industrial profiles designed to individual specifications made from the proven iglidur materials. Profile geometry examples include U-shaped or square profiles, half-shells or tubes made of iglidur. They are used as sliding rails, guide rails or wear profiles in a wide range of industries – from machine and plant engineering, through the beverage and food industry, to the textile industry. According to the company, all iglidur
semi-finished products – whether round bars, plate material or profiles – are optimised for low friction and wear. They are self-lubricating and therefore maintenance-free. On request, special parts made
of semi-finished products can be obtained via the ‘speedicut’ service. Simply submit a 3D model or a drawing via the speedicut online tool
www.igus.co.uk/speedicut for a quotation, and upon receipt of the order the components are machined and dispatched within a few days.
igus
www.igus.co.uk
/ DESIGNSOLUTIONS
VALVE ISLAND PLATFORM EXPANDS
The ASCO Numatics G3 Series electronic valve island platform, available from Emerson, has been expanded so that it can control up to 128 solenoid valves on a single valve island assembly. This allows more valves to be controlled from a single node. According to the company, customers will benefit when they control a high density of valves or pneumatic equipment in a packaging plant or on a skid. Designers will be able to minimise cabinet space and have fewer nodes dedicated to pneumatic valve islands. The valve platforms can support up to 128 11mm solenoid valves and up to 80 18mm and 26mm valves. To increase the capacity, mid-station blocks were added with valve drivers and auxiliary power connectors. A wide variety of communication protocols are supported including Ethernet/IPTM DLR, Profibus DP, and Valve Sub-bus for distribution.
Emerson
www.emerson.com
ENGINEERING PLASTIC PROFILES
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