Posts Tagged ‘CNC Turning’

Latest CNC turning ups blow mould productivity

Thursday, June 11th, 2009

A long-bed lathe is helping a manufacturer of blow moulds to increase its productivity and maintain its competitive advantage by reducing set-up time for turning complex cavities.

Solent Mould Tool (SMT) – the UK’s largest independent blow mould manufacturer has recently invested in a Hardinge Talent 10/78L (long-bed) lathe.

The machine, installed at SMT’s Waterlooville facility in August 2006, is helping the company increase its productivity and maintain its competitive advantage by reducing time (and resources) spent on job set ups as well as reducing machine cycle times (both by as much as 50%) – when machining complex cavities in mould tools.

The net results for SMT through its investment in the Hardinge lathe are shorter lead times and improved part accuracy – which, in the world of complex mould tool manufacture, are very welcome.

* Comprehensive production capability – Solent Mould Tools was established in 1986 and today employs over 40 people.

The company designs and manufactures blow moulds (up to 2 tonnes) for a range of sectors and industries.

The company provides a total systems solution service to its mould tool customers.

This does not just include the manufacture of complex moulds but also involves working in close consultation with customers to develop and design mould tool concepts and prototypes prior to production sets being manufactured.

SMT also provides comprehensive mould tool repair and modification services to customers.

In addition to investing in the new Hardinge CNC lathe – SMT has also made significant investments (over recent months) in a number of 5-axis and high-speed machining centres used to mill slots, recesses and pockets, etc, in a single set-up.

The company has impressive CAD/CAM capability and, via DNC links, ensures fast data transfer between its design and production operations.

SMT’s moulds are used by customers in the UK and throughout Europe and increasingly within the USA – which demonstrates the truly global nature of this market.

The company’s moulds are made mainly from aluminium although in some instances steels and alloys – Alumex – are used.

SMT moulds are used in the volume manufacture of plastic bottles (PET, HDPE, PP, PVC etc.) for mineral water, soft drinks and fruit juices, carbonated beverages, cosmetics, toiletries etc – and in total the company manufactures in the region of two thousand mould tools every year.

The mould tool industry is highly competitive with price, quality and lead time reduction being of critical importance.

The decision by SMT to invest in the Hardinge Talent 10/78 lathe was in response to these market demands.

* Cycle times reduced by 50% – the Talent lathe is being used to machine the internal cavities in the mould and has been installed adjacent to an older Hardinge Cobra lathe that is used to machine external features on the mould tool.

Using high-density and diamond tip tooling – the Talent is able to perform heavy-duty cutting operations to high accuracy and repeatability.

Said Andy Thorpe, shop floor chargehand at SMT: “The Talent lathe has provided us with additional capacity and capability – and has helped us become more productive.

Typically machine cycle times have been reduced by some 50% and the fine surface finishes we are able to obtain, which includes the elimination of blend lines, also means less time spent on secondary polishing operations.” * Check-out the Talent CNC lathe – the new Hardinge Talent 10/78L is a long bed lathe (1050mm between centres) designed for heavy duty turning applications.

The machine is equipped with a 18.5kW, 3500 rev/min spindle (402Nm); 30m/min rapids on both X and Z-axes; a 12-station turret and the Fanuc 0i-TC control.

Boosting the productivity of a lathe operation by at least 50 percent is as

Tuesday, February 24th, 2009

Boosting the productivity of a lathe operation by at least 50 percent is as

easy as adding a barfeeder. Such productivity gains stem from the fact that barfeeders provide a constant supply of raw part material to lathes, allow for unattended operation and lend support for machining at fast speeds.

Without barfeeders, a shop has to cut raw stock into manageable slugs, move them to the turning machine and manually load and unload the machine. Those activities diminish machine throughput because they extend non-cut times between parts.

Barfeeders, on the other hand, automatically feed long lengths of barstock into lathes for hours of unattended operation, freeing machine operators for other duties such as secondary operations, part cleaning and packaging.

Lathes basically cost about the same no matter where they are purchased, but the cost of operating them varies when factoring in labor, or a manufacturing facility’s burden rate. Affordable automation, such as barfeeders, eliminates the manual burden rate and allows shops to compete globally with countries that have low labor rates. In addition, manufacturing facilities can continually improve throughput with such automation.

The goal is not necessarily to replace operators with barfeeders, but to set up machines with a constant source of raw materials that allows them to run unattended at night and on weekends. So shops can schedule and set up work during the day shift and run the jobs at a low cost per-hour while increasing their cutting times and getting a greater return from their investment in the machine tool.

With a $15,000 barfeeder, using it over a five-year period for 35 hours per week, 50 weeks of the year — for a total of 8,750 hours — the hourly cost of ownership is $1.71 per hour. However, that is a conservative estimate. With careful scheduling, their use can be extended to nights, weekends and holidays, and the hourly cost could drop as low as $0.34 per hour. No operators in the world work for such a low hourly rate.

The long and short of it
Two common styles of barfeeders are single-bar tube and magazine, and the magazine styles are available as long or short versions. Single-bar tube feeders typically work with Swiss-style sliding-headstock machines for loading wire-gage material and barstock measuring up to 1.750 in. in diameter. While these feeders require shops to load bars one at a time, the machines they feed are typically running small, short complex parts with long cycle times out of 12-ft.-long bars that provide one or two shifts of unattended operation.

Magazine-style barfeeders hold multiple pieces of barstock in different shapes and diameters and feed one bar after the other into a lathe. Changeovers from different bar sizes and shapes are quick, easy and automatic, taking as little as 15 seconds for some models. Loading magazines can be done while the barfeeder and lathe are working. Such fast changeovers mean barfeeders could be used on low and medium-volume jobs as well as the high-volume jobs they are usually associated with.

The long styles of magazine barfeeders handle 12-ft.-long barstock and can keep lathes running unattended for multiple shifts. Short-style magazine feeders provide up to 8 hours of unattended lathe operation feeding bar lengths typically 3 or 4 ft. long. The bar lengths are determined by the headstock lengths in the lathes that they feed because machine headstocks support bars when running a short-version feeder.

By not having to rely on the barfeeder for back-end bar support, shops can run lathe spindles to their maximum speeds. That is especially beneficial when using carbide, ceramic and Cermet cutting tools that excel at high speeds for producing precision surface finishes. Short-version magazine barfeeders also take up less floorspace.

Some styles of single-bar tube and long-version magazine barfeeders offer significant back-end bar support, so shops are not limited in the turning speeds they run when they use them. In some instances, shops can double spindle rpm to increase surface feeds and decrease part cycle times.

Barfeeders are equipped with either hydrodynamic or hydrostatic support systems. In ideal conditions, hydrodynamic systems offer stability at turning speeds up to 1,600 sfm, while hydrostatic ones handle speeds up to 3,000 sfm.

http://www.americanmachinist.com/304/Issue/Article/False/13668/Issue

CNC turning centres machine in one set-up

Sunday, February 1st, 2009

To provide simple and cost effective machining of more complex components CNC turning centres combine operations in one set-up, offering faster cycle times and automatic parts handling.

CNC turning centres will be among many machine tools to be shown at MACH 2008 by the 600 Group.

Its member companies will be demonstrating their ability to provide a solution to virtually any machining problem.

The Group will be manning five stands at the show – a triple stand in the machine tool area of Hall 5, a stand in the Tooling Village in Hall 4 and another in the Laser Marking area in Hall 4.

600 Group will have many new machines and equipment available to enhance a customer’s performance.

The 600 Group said it is well placed to offer manufacturing solutions from its extensive range of own- manufactured products as well as its principals, distributed through the 600 Centre in Hall 5.

The triple stand construction allows 600 Group to demonstrate its three product ranges (600 Solution products, Colchester- Harrison CNC products, and Dalian value products) in a single area of the exhibition.

Group Marketing director, Stephen Le Beau, said: “The intention is to assist customers achieve greater productivity, higher efficiencies and improved profitability by installing the correct machine, appropriately engineered, for specific applications.

I believe 600 Group is the only machine tool company to offer three distinct ranges of products across such a wide spectrum.

This means we can provide exactly the right solution for the customer, without compromise”.

He added: “Working in partnership with customers, using their knowledge of their requirements in conjunction with our profound understanding of machine tools, we will be illustrating how manufacturing companies can be successfully competitive at a commercially realistic cost at the show”.

* CNC turning and mill/turn centres – Colchester-Harrison said it focuses on driving technology forward to make the quantum leaps which keep the Colchester-Harrison lathes at the forefront of the world market for turning machines.

Demonstrated on the stand will be the new lathes and new VMCs.

The new machines are designed to provide simple and cost effective machining of more complex components by, for instance, allowing multiple operations in one set-up, faster cycle times, minimal tool change times, automatic loading and parts handling.

Standard machines can be readily customised to produce machines for specific applications, developing special workholding systems, alternative ejection systems, etc, to give the customer exactly what he wants in the shortest lead times possible.

Standard machines designed to accommodate the requirements of those customers who still need relatively simple CNC machines will also be demonstrated at the show.

Flanking the Group’s own Colchester-Harrison products in the ‘Solutions’ section, will be machines from Toyoda Mitsui-Seiki, Fanuc, Fuji and Okamoto.

In the ‘Value’ section of the stand, a comprehensive range of Dalian conventional and CNC lathes, mills and machining centres will be on show.

* Work holding – on the stand in Hall 5, West Yorkshire based Pratt Burnerd International and Crawford Collets will also be demonstrating their bespoke and modified workholding equipment designed and manufactured to provide customers with improved profitability.

Preferred suppliers of workholding systems for complex parts to the German automotive industry, the companies will be demonstrating ’second-to-none’ ability to resolve workholding problems.

In addition, new chucks and collets will be launched at MACH.

* Laser marking – more companies are concerned with traceability and are demanding products to be marked.

The ability to mark the machined components cost effectively and efficiently is becoming more critical.

Letchworth-based Electrox will be demonstrating the ways customers’ productivity is improved by the quantum leaps forward it has made in laser technology.

Designing and manufacturing standard and bespoke laser marking systems for a wide range of industries, it will be showing its new laser marking systems, including the ground-breaking and proprietary EF Technology and practical workstation designs.

“Through our extensive research, Electrox has been able to take applied laser marking technology into a completely different arena, providing customers with exceptionally easy to use and extremely reliable laser marking systems – for instance EF Technology comes with a four year warranty, the longest available on any laser marking system,” said Le Beau.

* Machine precision bearings – completing the demonstration of the 600 Group portfolio will be Gamet Bearing The company will be exhibiting its range of super high precision taper roller bearings.

Used in every industry where rotational accuracy is critical, the company will have a selection of its bearings on display at the show.

Le Beau concluded: “Eighteen months ago, we announced a forceful new business strategy, focussing our attention on a customer-orientated provider of manufacturing solutions.

CNC machining, CNC turning and saw cutting available from Kilner’s Engineering

Wednesday, August 13th, 2008

The efficiency in CNC machining provided by Kilner’s Engineering comprises of high torque 15 kilowatt or high speed 10000 RPM spindle, dividable work zones for maximum productivity, heavy duty 300ø 4th axis for multi face machining, rapid tool change times for multiple operations. The versatility in CNC machining consists of aluminium, engineering plastics, brass or copper, high tensile steels, quench & temper plate, mild steel, stainless steel. The capacity of CNC turning consists of Ø330 x 450 millimetre work envelope, batch quantities 1 – 5000+, up to Ø65 millimetre bar feed capacity.

The efficiency in CNC turning consists of high torque or high speed 5000 RPM spindles, large range of collets and soft jaws in stock, competitive repetition cycle times, automatic bar feed and part catching facilities. The versatility of CNC turning comprise of aluminium, engineering plastics, brass or copper, mild steel, high tensile steels, stainless steel. The saw cutting provided by Kilner’s Engineering encompasses efficiency such as digital control of part length and quantity, variable blade speed and feed control to optimise productivity, repetition part production with automatic feed, bundle cutting capacity for rapid part production. The versatility of saw cutting includes aluminium, engineering plastics, brass / copper, mild steel, high tensile steels, stainless steel.

http://www.ferret.com.au/c/Kilners-Enineering/

Vertical turning centres mill and drill

Wednesday, August 13th, 2008

Precision turning as well as milling/drilling operations on large components may be performed on vertical turning centres storing, as standard, up to 36 driven tools.

Precision turning as well as milling / drilling operations on large components may be performed using the latest Okuma and Howa ‘VTM’ vertical turning centres, marketed in the UK by sole agent, NCMT Two machines are available offering maximum turning diameters of 650mm and 1000mm respectively

Both can be supplied with storage for up to 36 tools, providing the flexibility needed for random machining of different components or families of parts.

Both the VTM-65 and the VTM-100 feature rigid structures developed to combine heavy rates of stock removal with high accuracy and excellent standards of finish.

Construction uses rigid, box-type castings for the base and column, while slideways are widely spaced for optimum rigidity of location.

The headstock / table assembly is designed to assist chip flow away from the work zone and a chip conveyor is available as an option.

Each machine uses 200mm diameter front bearings for the main spindle, which is powered by a 30kW AC motor to give stepless speed selection in the range 13 – 1,250 rpm.

The machines use a single tool location in combination with a multi-tool magazine.

The tool post facilitates both rigid turning and rotating tool operations using ISO 50 taper-mounted tooling; the motorised spindle on the toolpost is powered by a 7.5kW motor and is automatically locked by a Curvic coupling for turning operations.

Smooth and stable feeding of the tools is assisted by use of a deadweight counterbalance for the toolpost / saddle assembly.

Tools are accommodated in a separate magazine with up to 36 storage positions being available.

Work envelope is defined by axis travels of 500mm in X and 635mm in Z on the VTM-65, and 650mm in X and 840mm in Z on the VTM-100.

Rapid traverse rates on the VTM-650 are 18m/min in X and 20m/min in Z, while the VTM-100 offers 16m/min in both axes.

Control is by a Fanuc 18TC CNC system.

Various optional equipment is available including high pressure coolant, automatic tool setting and a twin pallet changer system, as well as a carousel-type APC with six pallets.

http://www.manufacturingtalk.com/news/ncm/ncm124.html