Turn-mill mid-size parts in one hit

The G320 twin-spindle turn-mill centre from German lathe manufacturer Index, featuring two lower tool turrets and an upper B-axis milling spindle head, is a new addition to the company’s product range. Together with the new G300 that utilises a third turret in place of the tool spindle, the machines complete the German manufacturer’s range for the turning and milling of complex, medium-size components in one hit. The sole sales and service agent for the UK, Ireland and Gulf markets is Kingsbury.

Capable of machining components up to 1400 mm long, the G320 joins a larger G420 model, introduced in 2018, the success of which led to the swift addition of an even bigger, more powerful G520 variant and a smaller version, the G220. These other sizes of machine have equivalent options that deploy an upper turret rather than a B-axis spindle.

All four model sizes share the same design, based on generously dimensioned linear guideways in the X and Z axes, and a rigid, mechanically and thermally stable, mineral-cast monoblock machine bed with good vibration damping characteristics. Rapid traverse rates are up to 50 m/min.

Notably, the milling spindle of the G320, positioned above the centreline of the identical, twin-opposed main and counter spindles, has -25 to +205° of B-axis swivel and 250 mm of Y-axis movement in addition to X/Z linear travels of 620/1400 mm. Full five-axis machining at either work spindle is therefore possible in conjunction with the C axes.

The tool spindle rating is 16.6 kW/72 Nm/12,000 rpm (100% DC) or 16 kW/45 Nm/18,000 rpm (100% DC), while the tool magazine has space for up to 111 tools (HSK-T63 or Capto C6).

For further information
www.kingsburyuk.com

Automated and flexible turn-milling

Delden-based Bredel, a manufacturer of industrial hose pumps, has invested in a M65-G MillTurn centre from WFL, which is has UK representation from Kyal Machine Tools. In order to make the best use of the productivity and capabilities of the turn-mill centre, the WFL machine is equipped with a large tool magazine, an automation solution from Promot and a quick-change jaw system from Schunk. With the complete installation, Bredel can produce various parts for hose pumps unmanned and with short throughput times.

At peak, Bredel wishes to use the new machine for 120 hours per week, with staff required for just one day shift. In order to achieve this level of utilisation, Bredel has opted for an automated production process.

Bertus Groteboer, senior manufacturing engineer at Bredel, says: “The decision to opt for a new turn-mill centre was already on the cards. Although these types of machine are much more expensive, the ROI is significantly better because you can combine machining processes, which means two separate machines are no longer necessary. We can therefore fully machine pump parts with both turning and milling operations in one set-up.”

The new WFL M65 G has a nominal centre distance of 2000 mm. Both spindles have an output of 56 kW: the two spindles and milling spindle allow for the complete machining of workpieces.

Thanks to the new automated turn-mill centre that can machine small batches flexibly, Bredel has reduced the throughput time for a set of pump parts from three days to just one. In addition, the manufacturer can respond much more quickly to urgent orders. Bredel is aiming ultimately to achieve 5500 spindle hours per year with its new M65-G MillTurn.

For further information
www.kyalmachinetools.co.uk

Filtermist moves Kerstar production to Telford

A UK manufacturer of industrial vacuum cleaners has relocated production to Filtermist International’s headquarters in Telford. Kerstar, which sells its Type H and ATEX-rated models, was purchased by the oil mist and filtration specialist in 2019 and, following an extensive lean manufacturing project, has taken the decision to centralise operations in Shropshire in a bid to deliver increased customer efficiencies. The company has also appointed a dedicated product manager to help it maximise the brand refresh and make the most of opportunities with its network of approved resellers and distributors.

For further information www.kerstar.com

A turning point for MRN

In September 2020, Banbury-based precision subcontract specialist MRN Engineering, invested in a new Doosan DNM 5700 vertical machining centre from Mills CNC. Virtually 12 months later, the company acquired its second Doosan machine: a 6-inch chuck Lynx 2100LYA multi-tasking lathe equipped with a 15 kW/6000 rpm spindle, driven tooling capability (6000 rpm), integrated Y axis (±52.5mm), 12-station turret and programmable tailstock, and Fanuc 0iTP control with a 15-inch touchscreen.

“To ensure high-productivity, machining flexibility and overall competitiveness I decided to explore multi-tasking, multi-axis lathes rather than going for an entry-level two-axis machine,” explains managing director Matt North.

The fact that a Lynx 2100LYA lathe was in stock at Mills CNC’s campus facility in Leamington and ready for immediate delivery, made the decision to invest a relatively straightforward one.

Since installation, the Lynx 2100LY has significantly strengthened MRN Engineering’s machining capabilities. The company can quote machining work that involves both turning and milling operations more accurately, quickly and successfully. No longer having to outsource turning work to third parties has also resulted in MRN Engineering being more competitive, better able to achieve tight customer deadlines, and more in control of its machining operations and business performance.

Says North: “We’re now in a win-win position. Being able to handle milling and turning work in-house makes life easier for us and our customers.”

To help increase its turning capabilities further still, MRN Engineering has recently invested in a new Hydrafeed Multifeed 65 electro-pneumatic bar feeder, which is now integrated with the Lynx 2100LY.

“Automating the Lynx means that we can now machine larger batch sizes and run the machine unattended,” concludes North. “As a result, I’m able to improve operational efficiencies, and reduce job set-up times and component costs.”

For further information
www.millscnc.co.uk

The Saw Centre cuts path to productivity

As a company with roots dating back to 1889, The Saw Centre and its growth trajectory really took off when a father and son partnership acquired the business in the late 1960s. The company has grown exponentially since then and now employs more than 30 staff at a 20,000 sq ft purpose-built facility. Now in its third generation of family ownership and jointly managed by David Stevenson and Tony Galbraith, The Saw Centre has evolved, with significant growth of its saw blade sharpening business bolstered by diversification into the sales and service of machinery for the wood, metal and UPVC sectors.

To expand its portfolio of services, the acquisition of a tooling service and manufacturing company in 2006 provided staff with the skills and knowledge to service the needs of the precision engineering and panel processing industries. The purchase of the small tooling company enabled The Saw Centre to move work from traditional machines to a CNC grinding centre and, subsequently, become the only independent company in Scotland with this facility. However, the mainstay of the business remains as its name suggests, and it is here that grinding and sharpening machines from Vollmer have made a significant impact.

It was back in 2001 that the company made its first major investment in Vollmer technology, purchasing a Vollmer CHD250R2 TCT saw blade sharpening machine and a Vollmer Loroch HSS saw sharpening machine, both connected to a Vollmer ND automation centre. At the time, it was the first Vollmer automation station in the UK to simultaneously service both HSS and TCT saw blade sharpening machines. That investment provided The Saw Centre with the facility for 24/7 operation, ramping up productivity levels and capacity. Most impressive was that the automated cell eradicated the need for three HSS saw blade sharpening machines and an additional four TCT saw sharpening machines. The cell removed seven machines from the shop floor, reduced costs, as well as power and consumables consumption.

Despite working around the clock for 20 years, saw blade technology has evolved and this required a new solution.

Joint managing director Tony Galbraith says: “The evolution of saw blades for our primary industries of wood, metal cutting, construction and UPVC has moved on drastically in the past 20 years. To service the needs of our customers and streamline our productivity, we needed to upgrade our machinery. This upgrade was the Vollmer CHD270 with ND250 five-stack robot loading system that arrived in 2021.

“As manufacturers strive to improve productivity and prolong saw blade life, the required geometries have become ever more complex,” he continues. “Unfortunately, the software, kinematics and machine movement of the old Vollmer CHD250R2 meant that we either had to undertake two or three set-ups to complete complex saw blades, or we would subsequently subcontract the work out to another supplier. In some instances, we turned away the sharpening of certain blades. Now, we can regrind everything on the new CHD270 and, when it comes to TCT saw blade sharpening, I wouldn’t go to anyone but Vollmer.”

The Vollmer CHD270 is a fully automated machine for the complete machining of TCT circular saw blades with eight CNC-controlled axes and measuring equipment. With the CHD 270, the entire grinding unit mounts compactly and robustly on a central monoblock main structure. Furthermore, the patented twin grinding wheel concept provides complete machining without having to replace the wheel.

Factory manager Scott McQuillan, who has been with the company for 25 years, says: “In the past 20 years, saw blade geometries have evolved considerably in all sectors, as saw blade suppliers and their customers strive to improve performance and blade longevity. In the panel processing industries, the demand for hollow ground blades with concave tooth geometries has increased drastically. Used in wall saws and vertical panel saws, the blades require an excellent finish and, as we are selling more of the machines and blades, we had to find a more efficient way of grinding them. Previously the blades would require two processes on two machines to get the quality we were looking for.”

The transfer of blades between the two machines resulted in a sharpening time of approximately 40 minutes, depending on blade size and type. Furthermore, these saw blades had to be manually loaded, increasing the workload for staff as the volume of blades continually increased.
“With the new CHD270 we can process the saw blades in a single automated set-up in less than 20 minutes,” says McQuillan. “Not only has this slashed our cycle times by 50%, it has eliminated manual loading as we can just put the blades into the ND250 robotic cell and forget about them.

“Blade manufacturers are continually increasing the geometry range of their saws and this is particularly prevalent in the UPVC and aluminium industry,” he continues. “We have some saws with flat tooth geometry and side bevels that would previously require three operations. This is now a single operation on the CHD270. Likewise, some saws would alternate teeth between flat and bevelled teeth. The CHD270 takes all this in its stride as it has all the tooth forms and geometries we could ever need, future-proofing our business from next-generation saw geometries that may come along.”

The move from the ageing Vollmer CHD250R2 to the next-generation CHD270 has gone far beyond extending flexibility and capacity at The Saw Centre.

“The machine has a host of new features that highlight how Vollmer has evolved its technology over the past two decades,” states McQuillan. “For instance, the CHD270 software is more user friendly than ever before and we now have apprentices becoming very competent at setting the machine with minimal training.

“Likewise, the software for the ND250 robot loader has improved. Previously, if there was an issue with a saw blade in the middle of a stack, we would have to remove half of the stack and reload it. Now, the software allows us to remove individual blades from the processing cycle without re-stacking. Additionally, with the variety of portable plunge saws on the market, we now can stack blades that are under 180 mm. We spent 2-3 hours of each day manually loading the portable saw blades but now, with the facility of stacking up to 70 at a time, we are gaining more time each day. Processing time has gone from 9 minutes to 6 minutes.”

In conclusion, McQuillan says: “The software, flexibility, kinematics and performance are much improved from the previous machine, but there is far more; the machine is more robust and the build quality has improved too. Additonally, the probing and measuring system is second to none, which means it is near-impossible to make errors. Even the hydraulic oil system has been enhanced with a new pneumatic system that is cleaner and safer for our staff.”

For further information
www.vollmer-group.com