JJ Churchill halves machining operations

Aerospace engineering firm JJ Churchill has reduced its tooling costs by 5% with a 50% reduction in the number of machining operations on a specific critical part. This has been achieved with Blue Photon technology, which is marketed in the UK and Europe by NCMT.

The technology is being applied to an aerofoil blade component made from titanium aluminide, an extremely difficult material to fixture and machine. Blue Photon fixes the component to the tool with an adhesive, which cures under UV light, making it strong enough for rigorous machining techniques. The process is a replacement for encapsulation, providing reduced fixture complexity. Operation reduction is achieved by fixing on to a single face of the component, as opposed to potentially many faces.
Locating on a single face provides access to other faces, enabling several complex features to be machined at the same time. This capability delivers greater precision during machining, and ultimately reduces the amount of metal wasted/scrapped.
Once the blade root and tip have been machined (held using Blue Photon technology), the workpiece is transferred to a Starrag five-axis machining centre, in this case a 28 kW/18,000 rpm LX051. The workpiece is held in specifically-developed fixtures for the complete machining of the aerofoil from forged blanks that are, at most, 5 mm oversize.
The impact on JJ Churchill’s overall production is to increase capacity, which is essential as the company continues its growth trajectory, while also benefitting the environment. Using Blue Photon reduces the electricity required for the process.
For further information www.jjchurchill.com

Schunk Intec celebrates 20th anniversary

MACH 2018 was a huge success for Schunk Intec with the company announcing that lead generation was significantly higher than the 2016 event. From a stand more than 20% larger than in 2016, the gripping systems and clamping technology specialist received a high level of interest in a complete range of product lines.

Schunk used MACH as an opportunity to hold a special ceremony on its stand to celebrate the company’s 20th anniversary in the UK. At the show, established product lines won plaudits and generated a high level of enquiries, however, it was new technology like the Vero-S Aviation stationary clamping system that really sparked the interest of MACH visitors.
Making its MACH debut, the Vero-S Aviation is a pneumatically actuated, zero-point clamping system developed for the direct clamping of structural components in the aerospace industry.
Also making its MACH debut was the new Co-act (collaborative actuator). As part of Schunk’s gripping system programme for safe human-robot collaboration – said to be the world’s first intelligent gripping module of its type – the Co-act was certainly a focal point at the show. The system permits adjustments to the gripping process to be made in real-time using diverse sensor systems.
Further stand-out solutions on the stand were the Vero-S quick-change pallet system, the Tendo hydraulic tool holder, the PGN-plus gripper, Magnos magnetic clamping technology, Rota-S manual lathe chuck and more.
For further information www.gb.schunk.com

Clamping devices of the future

A choice of effective clamping devices for tool and workpiece avoids expensive changeover times and helps to utilise the machine tool’s potential more effectively. With this in mind, the Precision Tool Association in the VDMA (German Engineering Federation), under the aegis of the METAV exhibition last month, hosted the 3rd Clamping Technology Forum.

Intelligent holding and clamping systems are becoming progressively more important in manufacturing operations, particularly as companies are increasingly having to deal with thin-walled and very small workpieces, as well as lightweight components. Here, intelligent clamping systems offer a huge potential for optimisation, although they also have “advantages when machining medium and small batch sizes with automated parts handling, and wherever comprehensive process monitoring is required”, says Henrik Schunk, managing partner of workholding specialist Schunk GmbH.
At Metav, Schunk gave a presentation on the importance of the toolholder in the production process. The company introduced an app with which a user can receive operating states of angle heads as raw data on his mobile terminal, enabling him or her to take countermeasures against production errors conveniently over a smartphone.
Angle heads are “very cost-efficient and flexible components designed to significantly expand the functionality of machine tools. Nowadays they are essential in an innovative metalcutting strategy,” explains Konrad Keck from Benz GmbH. Advantages and possible applications of magnetic and vacuum-based clamping techniques were also showcased at Metav.
Overall, experts presented numerous solutions, which thanks to the optimised deployment of clamping devices, can render the production process more efficient and cost effective.
For further information www.metav.com

Flexible automation for the masses

From its biggest ever stand at MACH 2018, Thame Workholding (Hall 6, Stand 170) will display a number of products receiving their UK exhibition premiere. For instance, RoboTrex is the first Lang automation equipment based on the small QuickPoint 52 system.

Suitable for retrofitting to the front or side of a machine tool, the RoboTrex can work with individual components up to 12 kg. Customers can choose from up to four specially designed workpiece trolleys that serve as vice storage systems. Furthermore, two new RoboTrex vices, with a jaw width of 46 and 77 mm, can be mounted vertically for optimal use of space when being picked-up by the robot.
Another MACH debutant on the Thame stand will be the Inoflex VL range. This weight-reduced series of self-centring four-jaw chucks is suitable for vertical turning centres, offering part-clamping capacity from 420 to 1200 mm. Compensating features permit the clamping of round, cubic and geometrically irregular workpieces when milling or turning.
While conventional chucks operate with all jaws moving in the same direction, either towards or away from the centre of the chuck, the Inoflex chuck operates with the jaws moving together or apart on two parallel axes. In addition, weight-reduction characteristics improve clamping forces at higher machining speeds while simultaneously reducing the stress and forces placed on the spindle when machining large workpieces.
Thame will also introduce its latest series of multi-face fixture systems for five-axis machining. This three-faced fixture facilitates the clamping of three individual components on a single device. According to the company, the fixture provides greater clearance and access to five-axis parts, especially when compared with standard four-face tombstone systems.
For further information www.thame-eng.com

Safe clamping of heavy dies

At the forthcoming MACH 2018 exhibition, Roemheld (Hall 20, Stand 444) will introduce a range of wedge clamping elements with patented safety bolts designed to attach a die set to the table and ram of a power press securely, regardless of whether the tool edges are straight or angled. A positive locking action allows even a heavy upper die to remain in place during maintenance or if the clamping pressure drops. The clamps move automatically, making them easy to operate, while a position control feature verifies closure and release, and reports if no die has been placed or if the edge is incorrectly set.

The system consists of a hydraulic cylinder block and a bolt guided within a housing; the bolt having a contact surface angled at 20°. A projection on the bolt and a corresponding recess along the die edge ensure positive locking if the hydraulic pressure holding the upper die should fail.
Adapter plates for simple attachment to existing dies make the retrofitting process trouble-free. The wedge clamping elements, with single or dual action, exert a force from 25 to 1250 kN. They are available to suit straight and angled die edges, and are designed in a variety of styles, allowing customers to configure clamping arrangements using a range of options. Modular construction allows cost-effective production of the elements, high availability and short delivery times, says Roemheld.
Permanent lubrication gives the clamps virtually maintenance-free operation. Due to their robust design, they are able to withstand high temperatures and soiling, and offer long service life. On request, multi-layer coatings can be applied to the bolts and housings to reduce wear in challenging applications.
For further information www.roemheld.co.uk