Automated blasting for e-transmission parts

For the expansion of its transmission production facility for electric vehicles (EVs), a German automotive supplier has purchased a new continuous-feed blast machine from Rösler that includes fully automatic workpiece handling. The customer chose the Rösler equipment, because it offered high productivity, is easy to maintain and has a long service life.

The workpieces in question consist of various toothed EV transmission components that are deburred using the Rösler continuous feed-wire mesh belt-blast machine. At the start of the deburring operation the workpieces are placed manually on two storage units, which are part of the component transport system. After an integrated camera system has confirmed the correct transport position, the parts are positioned precisely on the wire mesh belt in lots of three and continuously transported through the shot-blast machine. Upon completion of the shot-blast process, a powerful blow-off system completely removes any residual blast media from the workpieces.

In the next step, the now deburred components are transferred to a buffering station consisting of a conveyor belt. Here, the workpieces are precisely repositioned so that a robot can pick up four parts at a time and place them in layers into suitably staged workpiece bins. Whenever a layer is complete, the robot picks up an intermediate cardboard sheet and places it in the bin. Completely filled or, in case of a workpiece change, partially filled bins are automatically removed from the robot working area. This allows the operator to safely remove them from the manufacturing cell with a lift cart.

The shot-blasting machine was designed for three-shift operation allowing cycle times of less than eight seconds per workpiece.
For further information www.rosler.com

AFTERMARKET CYCLE PART MANUFACTURER PREDICTS RAPID GROWTH

Set up as recently as 2016 by ex-professional cyclist Andrew Cooper, Unite has already established itself as an up-and-coming manufacturer of aftermarket cycle products. Having started out with two second-hand, three-axis machining centres in a factory unit in Newtown, Powys, the company recently doubled the number of machines on the shop floor with the purchase of two new production centres. The machine are a Brother five-axis machining centre and a Biglia CNC bar-fed lathe, both supplied by Whitehouse Machine Tools.

Funds for repayments on the machines are being generated not only by the sale of cycle parts, but also by providing a subcontract machining service, a side of the business that has recently risen from 5 to 60% of throughput.

The first machine from Whitehouse, a Japanese-built Brother M200X3 five-axis machining centre, arrived in November 2021 to enable the manufacture in one hit of complex prismatic parts for cycles, such as pedals and stems. It is possible to produce them on the three-axis machines, but expensive fixtures would be needed and, in any case, the quality would be inferior, which is the last thing Unite wants while expanding its range of premium products.

Brother machines have a 30-taper spindle rather than a 40-taper tool interface, but that was of no concern to Cooper as he mainly cuts aluminium. Factors important to him when buying a new machine tool are productivity and purchase price. A couple of 40-taper machining centres were also considered, but he opted for the Whitehouse offering despite it being the first time he had dealt with this supplier.

During machine installation, Whitehouse integrated a Universal Robot cobot (collaborative robot) that had previously been purchased through WMH Robotics together with a workpiece stocker table. The equipment enables components requiring two operations, such as pedals, to emerge from the production cell completely machined after having been inverted following op 1 and placed back in the fixture. Initially, blanks are picked up individually from one side of the table in front of the machine and finish-machined parts are returned to the other side.

The cell operates largely autonomously for about 20 hours per day, producing parts in batches of from 10 to 1000-off to a general tolerance of 0.05 mm, although some features are tighter. Rapid set-up times in the Brother cell of around 5 to 10 minutes, without the need for tool exchange (as all of the cutters needed are resident in the magazine), make machining smaller volumes economical. This is fortuitous, as the current high price of material means that producing smaller volumes is highly desirable in order to reduce the cost of work-in-progress.

Brother’s M200X3 has a 200 rpm C-axis torque table that facilitates not only milling and drilling, but also rotational machining of components with a turning tool in the spindle. While some users find this mill-turn capability in one clamping invaluable, Cooper does not plan to exploit it for machining his products, as few of them would benefit. Some subcontract components might well be machined more economically using such cycles, however.

Instead, turned cycle components up to 70 mm diameter requiring some milling content are being produced in one hit from bar in a new Biglia 620YS turning centre equipped with a sub-spindle for synchronous part pick-up and reverse-end machining. The lathe also benefits from a turret with a Y axis and 15 live stations powered by a 13 kW motor. Y-axis CNC movement is essential, as a number of cycle components, such as headsets, require a slotting operation that would be impossible to perform in-cycle using just the X and Z travels, so would necessitate a second operation on a mill.

The lathe arrived in Newtown in February 2022, prior to which production of about 20 rotational parts was subcontracted out locally and pedal axles were bought in from overseas. A couple of other potential lathe suppliers were considered before the decision was made to purchase the Biglia. However, the specification of the Italian lathe, with its 30 kW/15 kW main/counter spindles and box ways in X and Z (with a linear guideway in Z for speed) clinched the deal.

Tolerance is easily held on the 620YS. It is generally 0.05 mm, but can be as tight as H7 (0.02 mm) on the bearing diameters of the now in-house-produced pedal axles, which are machined from 17/4 stainless steel of the top hardness grade (11050).

The production of around 30 new aftermarket cycle products that are predominantly turned is planned for the lathe, which will soon be working a five-hour ghost shift at the end of each day thanks to automatic feeding of bar stock from a Hydrafeed Multifeed 80 short bar magazine.

“The purchase of highly capable, multi-axis production centres such as the Brother and Biglia are the way forward for us and will underpin what I hope will be rapid growth,” says Cooper. “I predict we will treble our staff from three to nine people by the end of our next financial year in March 2023.

“As to my decision to opt for these machines from Whitehouse, it was partly down to the high-quality build and suitability for the intended applications,” he continues. “However, the support provided by the supplier was also a contributing factor. It included recommending a finance company, early help with establishing some machining processes and writing programs, and the ongoing offer of unlimited training.”

Cooper adds that other new equipment arrivals in the next few months will be a plastic 3D printer for producing components such as chain guides, and a sand-blast booth together with environmentally friendly ceramic-coating equipment to avoid the colour variability previously experienced when putting cycle parts out for anodising.
For further information www.wmtcnc.com

DISPLAY OF FORCE BY DURMA LASER

Impulse Point of Purchase, a designer and manufacturer of award-winning POP displays across a number of industries, has invested in a new Durma HD-FL 3015 fibre laser cutter with automated loader from Axe & Status. The machine is delivering a 30% increase in speed on thinner-gauge materials, and around 10% on average across all thicknesses, providing a notable impact on bottom-line profitability.

Based in Sandy, Bedfordshire, Impulse POP draws upon many decades of experience in the provision of end-to-end engineering, manufacturing and installation services to retail segments that include sport, music, fashion and jewellery, food and drink, health and beauty, and DIY and gardening. Each solution provides brands with highly effective merchandising opportunities.

Mark McKeown, a man with over 30 years of experience in the POP sector, established the business in 2005. After just three years, the company moved into its current 10,000 sq ft facility and has since grown into a £1.5m turnover business.

“We’re still smaller than some of our competitors but we offer a first-class tailored service,” he says. “We provide an intimacy with our customers that is often missing with many of the larger market players. Our customers use us because they know we can solve their problems.”

The in-house production capabilities of Impulse POP are a major advantage when it comes to winning new contracts, which is why the company insists on regular investment to keep pace with the latest manufacturing technologies. “We had a CO2 laser cutter from another supplier and, although there was nothing wrong with the machine, we knew that investing in a fibre-based solution would bring a number of important advantages,” says McKeown. “I see a laser cutter as a workhorse and, although we scrutinised many machines, we couldn’t see sense in spending top dollar unless we could really monetise that value. We have Durma press brakes, as well as a corner notcher and a guillotine, so it was a proven brand for us. The Durma HD-FL 3015 fibre laser cutter soon became the clear favourite. We also wanted a loader/unloader so we could work unmanned during the day and lights-out overnight.” Installed in October 2021, such is the confidence in the new automated Durma fibre laser cutter that Impulse POP dispensed with its previous CO2 machine.

“We had a couple of teething issues, which is normal, but Axe & Status, including the team from Durma in Turkey, reacted very quickly,” states McKeown. “I’m very happy with the support we received and I really like the machine; it was absolutely a good decision from our perspective.”

The majority of the material that Impulse POP processes is mild steel (for its display customers), but the company also runs aluminium and stainless steel. In addition, the introduction of the Durma fibre laser means Impulse can run copper and brass if needed.

Typically, the company works with material thicknesses from 1 to 12 mm. Impulse selected the 4 kW Durma HD-FL 3015, which can process mild steel up to 20 mm thick, stainless steel up to 10 mm, and aluminium up to 12 mm. However, versions up to 20 kW are available if companies want to cut even thicker materials. The HD-FL 3015 offers 3060 x 1530 x 160 mm in the X, Y and Z axis respectively, although models up to the HD-F 16030 are available from Axe & Status with travels that extend to 16200 x 3100 x 185 mm. Control is via Sinumerik 840D SL with 19” touchscreen.

“We design everything in SolidWorks and use Lantek as our programming software, from where the Durma laser pulls jobs as required over the network – we simply press the start button,” explains McKeown. “Once cut, we bend, weld and finish the parts accordingly.”

A good example of the work that Impulse POP handles is a display completed recently for Candy King, a leading supplier of pick and mix sweets, which wanted 950 units for the UK’s entire portfolio of One Stop convenience stores. This attractive POP solution featured a 1.2 mm mild steel body produced on the Durma laser, with the full assembly undergoing welding, powder coating and the application of branded transfers.

“It was amazing to watch this job on the laser,” states McKeown. “It took just 90 seconds to cut a full sheet of three display bodies, which was very fast. Within 10 hours we had completed the entire 950. Running the job on our new fibre laser with automated loader/unloader was quicker than using our previous CO2 machine, so it gave economies of scale. The Durma is at least 10% faster on average. However, for thinner work, such as the 1.2 mm mild steel display for Candy King, it’s more like 30% quicker.”

The Durma HD-FL 3015 fibre laser cutter features a linear motor motion system that delivers very high acceleration (synchronised 35 m/s2), speed (synchronised 226 m/min) and positioning/repeatability (±0.03 mm). The savings that Impulse POP accrues from the additional speed are supplemented by its use of compressed air as the assist gas.

“This strategy works really well on thinner materials,” says McKeown. “As long as the air is clean, it’s effectively free because we’re running our compressor anyway. We ran compressed air for the Candy King job, which probably saved around £150 of nitrogen. I also like the zero warm-up time with fibre technology. We would previously wait around 20 minutes for our CO2 laser to be ready.”

Being a full service provider with fast manufacturing technologies is key to success at Impulse, which is capable of supplying quickly and efficiently across a wide range of materials, including metal, wood and acrylic. Temporary and permanent retail displays, as well as in-store, pop-up, event and exhibition display stands, are all within the team’s in-house capabilities.

Notably, the Durma laser not only delivers short cycle times, but outstanding quality and flexibility in manufacturing, all of which bodes well for a bright future. “Of course, certain challenges remain, not least the fact that metal prices have doubled since the onset of the pandemic,” concludes McKeown. “What’s more, energy prices are rising almost constantly and transport companies are hitting us with surcharges to cover their growing fuel bills. All of this makes costing tricky. However, we are renowned for our problem-solving and we’ll find a way, particularly with the help of our new Durma laser cutter. Investment remains key to our ongoing success.”

For further information
www.axestatus.com

SUBCONTRACTOR PROGRESSES FROM MANUAL TO CNC MACHINING

Founded in 1992, P&T Precision Engineering has an established reputation as a subcontract manufacturer that specialises in the production of jigs, fixtures and machined components for the food, medical and pharmaceutical sector. Historically a manual machine shop, the County Kildare based company has made the transition from manual to CNC machining with the support of the Engineering Technology Group (ETG) Ireland.

Discussing the transition from manual machine shop to CNC facility, Darragh Walsh, managing director of P&T Precision Engineering, says: “We were a small family company with six employees and we decided to invest in CNC machines from ETG. We ended up buying quite a lot of new equipment. This helped us to grow in certain sectors and helped our customers to get more products in shorter lead times. In a short period, we have gone from six staff to 22, but we have also grown our number of machines – and we hope to grow that into the future as well.”

Jamie Fletchmore, managing director at ETG Ireland, adds: “P&T was an up and coming family-run business that was transitioning from manual machines into the CNC world. They approached us and we sat down and spoke about the first machining centre, introducing them to the Quaser MV184. From there, we migrated on every two years and they were buying more technology, which included the Nakamura AS200L turning centre. Two years later they purchased another Quaser MV184.”

The Quaser MV184 vertical machining centre from ETG is a model that provides X, Y and Z-axis travels of 1020 x 610 x 610 mm. This spacious work envelope covers a 1200 x 600 mm bed upon which users can load parts weighing up to 500 kg. The BT40 taper spindle machine provides a maximum spindle speed of 12,000 rpm, supported by a 30-position ATC.

“This type of machine is a big step up from where they were, machining parts on manual machines in multiple operations,” says Fletchmore. “With the Quaser MV184, P&T were able to take those manually machined parts from drawing and CAD model straight into the machine with a finished part coming off. As a result, they were able to get the parts through the shop floor much faster, and that also reduces the downtime involved with going from one operation to another as part of the manual process. Investing in our machines and technology has enabled P&T to move through different types of components and different kinds of materials, especially harder materials. This has allowed them to enter new markets.”

He continues: “It opened doors and opportunities that led the company to then look at the Nakamura AS200L turning centre. The AS200L introduced P&T to a new range of machine tools. They were making parts in multiple operations on a lathe, but by using the Nakamura AS200L turning centre they can finish those parts complete in one operation. P&T are now able to do all of the milling, drilling, tapping – and transfer parts to the second spindle – in one complete operation.”

The Nakamura AS200L twin-spindle turning centre from ETG is a 65 mm diameter bar capacity machine with an 8-inch chuck that offers a turning capacity up to 340 mm diameter with a maximum turning length of 570 mm – providing sufficient capacity for the requirements of P&T. With an 11/15 kW, 4500 rpm main spindle motor and a sub-spindle unit offering 5.5/7.5 kW and 6000 rpm, the Nakamura AS200L is suitable for the productive turning of all material types with its blend of power, torque and spindle speed. A driven tooling unit has a capacity for up to 15 tools with a maximum spindle speed of 6000 rpm and 3.7/5.5 kW spindle power.

“P&T is a very creative company and they do a lot of design work for their customers,” says Fletchmore. “They came to us with particular types of work and asked if they could do it on our machines. We sat down with them and supported and guided them through the different ways that we could approach jobs – in a way that was different to what they were doing in the past. That has enabled P&T to create much better components, much quicker, while retaining and improving upon the precision and the tolerances of parts.”

Says Walsh: “We went to ETG because they provide great support and service, as well as fantastic quality machines with great repeatability and durability. We have never had any issues with any machine that ETG hasn’t been able to fix within a couple of hours. The Nakamura AS200L turning centre has enabled us to machine components in a much faster time because there are fewer set-ups. So, instead of taking jobs from the lathe to the mill, we can now do it all in one shot. This has decreased our machining times, reduced our delivery times and means we can get more parts through the machine shop.”

ETG Ireland provided all of the training, as the Heidenhain CNC control was new to P&T. This included full operator training where ETG Ireland went in and set P&T parts up with the shop floor machinists and went through the full machining aspect. In short, ETG Ireland has taken P&T from manual machining to full CNC.

Looking to the future, Walsh concludes: “The future for P&T will hopefully see us expand to 2000 sq ft and grow our workforce to help increase capacity. This will certainly result in more machine tools from ETG Ireland.”

For further information
www.millscnc.co.uk

AN ENGINEERING COMPANY WORTHY OF HIGH REGARD

Strategic and prudent investment in advanced Doosan machine tools is helping contract manufacturing specialist, Oxford Engineering Ltd (part of the Oxford Engineering Group), achieve significant organic growth, secure new business wins and deliver high-quality manufacturing solutions congruent with its aspirational and motivational vision statement.

Mills CNC, the exclusive distributor of Doosan machine tools in the UK and Ireland, has recently supplied the company with three new multi-tasking machines. The machines, all DNC-linked and equipped with the latest FANUC controls, comprise a DNM 6700 vertical machining centre, a 10/12” chuck SMX 2600S turn-mill machine, and a 21” chuck (large-capacity) Puma 5100MB lathe.

The machines were delivered and installed at the company’s well-resourced machine shop facility over a six-month period (October 2021 – April 2022) and have taken their place alongside the company’s (but not the group’s) first Doosan machine tool investment – a DNM 750L II vertical machining centre acquired in June 2019.

Says Karim Sekkat, CEO, Oxford Engineering Group: “Doosan machine tools, supplied and supported by Mills CNC, are technically excellent machines. They are flexible and reliable, deliver outstanding accuracy and repeatability, and help us keep our quality, delivery and cost promises to our customers.”

He adds: “We now have four Doosan machines installed at Oxford Engineering Ltd’s facility in Abingdon but, across the whole group, the number is considerably higher, with our two Hutton Engineering facilities, in Bicester and Abingdon, having a total of over 20 Doosan machines between them.”

However, it is not just the technical capacity and capabilities of Doosan machine tools that have made, and continue to make, them so attractive to Oxford Engineering: it is the service and support provided by Mills CNC that adds to their appeal.

“Doosan machines are reliable but, if and when, any issues arise that affect their performance or cause downtime, we know that Mills’ after-sales and support services will help keep any disruption to our and our customers’ production schedules to a minimum,” says Sekkat.

Oxford Engineering Ltd, is a vertically integrated contract manufacturing specialist that provides a range of high integrity services and solutions, which include technical consultancy, precision machining, welding, fabrication, assembly and testing, to a growing number of global customers operating in the medical, nuclear, semiconductor, aerospace, defence and scientific instrumentation sectors.

Like all other companies in the group (such as Hutton Precision Engineering and Oxford Engineering Estonia), Oxford Engineering Ltd is characterised by its data-driven approach, where the company acts and makes decisions based on facts and manufacturing KPIs, as opposed to ones based on guesses, anecdotal evidence or ‘gut’ reactions.

As such, this strategy, focused on the collection, processing and interpretation of real-time data (gained from a variety of sources that include the company’s shop floor equipment and MRP/ERP systems), enables senior managers to continuously monitor and benchmark performance against KPIs, identify issues and factors that affect/impact upon productivity, spot emerging trends and opportunities, and make strategic and timely interventions to ensure process optimisation.

“We operate in highly-regulated markets where there is an emphasis on continuous improvement, innovation, traceability, process reliability and cost reduction,” states Sekkat. “To ensure we are able to provide our customers with the best possible service and solutions, we adopt a holistic approach that covers all aspects of production, including supply chain management and logistics issues, lean manufacturing methods and imperatives.

“In this way we are able to build and customise our manufacturing operations and processes around individual customer requirements,” he continues. “As such, our customers have come to expect, and now rely on us, to have advanced manufacturing technologies and optimised processes in place to help them outperform their competitors and delight their customers.”

To ensure that this can occur, Oxford Engineering has implemented a company-wide continuous improvement programme and, as such, makes regular investment in its people, plant and equipment, as well as its processes and systems. For example, in addition to the recent investment made in the three new Doosan machine tools, the company has significantly strengthened its metrology/inspection credentials with the acquisition of a laser-driven Global S Chrome coordinate measuring machine (CMM).

“It’s all about being the best we can possibly be,” says Sekkat.

The three new Doosan machines acquired by Oxford Engineering comprise an advanced vertical machining centre with a 4th-axis unit, a multi-axis turn-mill machine featuring an integrated bar feeder and a large-capacity turning centre with large bore capabilities and driven tooling. Mills CNC says these machines provide Oxford Engineering with reliable cutting performance and flexibility and, irrespective of the materials machined or the part accuracies and/or surface finishes required, are more than up to the task.

The latest machine tool investments also highlight and encapsulate Oxford Engineering’s technology preferences and imperatives, namely to invest in FANUC-controlled Doosan multi-axis and multi-tasking machines with integrated automation.

Says Sekkat: “We know from our group experience that multi-tasking Doosan machines from Mills CNC supplied with integrated automation are proven performers and help us reduce job set up and part cycle times, avoid production bottlenecks, ensure improved asset utilisation and meet ever-stringent customer delivery deadlines.

“We work in partnership with customers to create strong, mutually-profitable and long-term strategic alliances,” he concludes. “Our investment in Doosan machines tools from Mills CNC is an important cornerstone in establishing and maintaining these relationships.”

For further information
www.millscnc.co.uk