Saturday, November 30, 2013
Kuroda Jena Tec are pleased to announce the launch of the BTA ballscrew end adaptor system which is a patented proprietary system for providing a standardised end locator for Kuroda ballscrew products. Designed to be a separate end locator and bearing journal, the unit allows the ballscrew shaft to be cut to length and then assembled with the standard BTA unit by manual assembly and clamping with no welding, press fitting or machining of the ballscrew required. Kuroda Jena Tec can offer BTA product, contact us on +44 (0)1623 726010 or by email at firstname.lastname@example.org
Kuroda Jena Tec’s innovative dual wheel grinding technology has been successfully sold to a specialist machine tool integrator for processing of ultra-hard synthetic material. The unique double wheel technology contained within a single spindle motor allows for roughing and finishing to be carried out by the same spindle with precise adjustment allowed by a closed loop servo control of the distance between both wheels. This allows the customer to achieve closely controlled finishing with minimal adjustment and much higher productivity as well as a reduced cost of a smaller machine footprint. Kuroda Jena Tec can enhance your grinding performance, contact us on +44 (0)1623 726010 or by email at email@example.com
Sunday, August 4, 2013
Minimum Quantity Lubrication Systems (MQL) – How to reduce energy and consumable costs without comprising machining performance.
MQL as an acronym (Minimum Quantity Lubrication) is becoming slowly more understood in the machine tool industry as its clear technical and cost benefits start to be delivered for users looking to reduce consumption costs and improve technical and environmental factors for their machining processes. Previously MQL had limited applications and was frequently associated with specialist processes such as turning or specialist mould and die finishing with ball end-mill applications. This article aims to explain the basic principles of the system and offers some recommendations on specific savings which may be achieved by users of MQL compared to conventional coolant systems. MQL utilises a soluble and/or bio-degradable cutting oil delivered in a fine mist to the machining area via either externally delivered nozzles or via integrated tooling to the work piece. It is used as an alternative to either dry machining where tool life is reduced or in place of high pressure flood coolant. Firstly, the disadvantages of flood coolant are numerous such as the high running cost of coolant pumps, maintenance of coolant systems, cleaning of the work area of the machine tool and particularly in summer or warm conditions the unpleasant odour sometimes emitted by poorly maintained coolant systems. It is probably a common viewpoint in the machining industry that a frequent observation of machine shops using flood coolant require a high level of maintenance not only in monitoring coolant condition but also clearing up spills from leaks and so on that present a health and safety hazard in the work place. While therefore it would be ideal to implement dry machining the effect on tool life, heat management and process performance means that this is not possible in most cases. Where dry machining is successfully employed, the process performance can be inhibited by the need to balance productivity against surface finish and tool life and maintenance costs. Therefore even where users have a defined dry cutting process, MQL can potentially assist with extending tool life and increase machining performance in terms of surface finish, cutting forces and process capability. To analyse the cost benefits of MQL, it is firstly worthwhile to study the typical categories of costs associated with the running of a conventional machine tool employing flood coolant in a production environment. When most people are asked about their opinion on which element contributes to the most electricity consumption of a typical CNC machine tool, most people may guess that it is either the main machine spindle (Either work holding or tool holding) or an axis servo motor. In reality these elements are much less, according to a study made by Kuroda shown in Figure 1, which identifies for mid-sized CNC machines that the main spindle only consumes about 12% of the total power consumption and around 7% for main axes feed from the servo motors. Comparatively however, the coolant system including chiller, pumps, and so on can contribute over 60% of the total machine power consumption costs. While this figure sounds relatively high, consider that in reality the machine axes are moving not all the time particularly if point to point positioning is being employed and modern servo motor technology actually produces very efficient motors from a power consumption perspective when not under load. Consider also that a spindle will not always be active either only during actual cutting operations ideally. Therefore a coolant pumping system with associated chillers needs to be ran fairly consistently despite the machine not actually cutting or machining and perhaps also off shift if coolant temperature needs to be maintained for optimum machining performance during actual shift hours to reduce idling time. Imagine thenn also larger users of CNC machine tool maybe also with centralised cooling system and you can start to visualise the potential cost implications of flood coolant systems in the overall consumption costs of machining operations.
Kuroda Jena Tec continues to provide innovation in its latest launch of a lightweight resin ballnut and screw assembly that combines the best in ballscrew technology with the lightweight attributes associated with leadscrews incorporating advanced materials technology. While non-metallic leadscrews have been in the market for some time, disadvantages include excessive heat generation and preferential wear and inaccuracy resulting in poor lifetime performance. Kuroda Jena Tec's exciting new product range comprises a specially selected injection moulded ballnut made of Poly-Phenylene Sulfide (PPS) and stainless steel balls and shaft. The new patent pending design therefore incorporates the advantages of low friction and low wear ballscrew technology with materials technology suitable for stringent medical, scientific or corrosive applications. Competitively priced between leadscrew and ballscrew technology, Resin Nut ballscrews offers a sizeable commercial and technical advantage. www.jena-tec.co.uk www.jena-tec.com www.jena-tec.de
Tuesday, July 16, 2013
Kuroda Jena Tec's most recent investment in hard turning technology has increased production capacity with the combined benefits of efficiency compared to conventional production methodology as well as the advantage of development of higher diameter to lead ratios than able to be produced by conventional production techniques in a single ballnut housing. The ability to hold precision ground tolerances with turning technology is due to the unique design and capability of a Mikroturn slantbed CNC machine from Hembrug Machine Tools.