INTERNATIONAL NEWS

In-cycle FSW on CNC machining centres

Horizontal machining centre manufacturer Heller has introduced the capability to friction stir weld (FSW) non-ferrous components on itsfour- and five-axis CNC machines. It is possible to combine the FSW process with milling, drilling, turning and other metal-cutting operations in the same cycle, saving time by eliminating a separate operation on other equipment – and the expense of buying it.

The integration of FSW into a Heller machining centre requires an inexpensive tool in the spindle, activation of a Heller technology cycle and the adaptive control function in the Siemens Sinumerik 840D sl CNC. The machine operator can easily program the weld path at the control, or else transfer the data from a CADCAM system.

Before welding starts, it is necessary to ascertain two key parameters: axial tool pressure and feed rate along the joint. They depend, among other things, on material composition and the required type and depth of the weld seam. Determining these values can pose a challenge, but Heller’s applications support team are on hand to assist. Pilot projects have shown that customers’ machine operators are quickly able to master the process.

To weld, the tool plunges into the gap between the two parts that require joining with high axial force until it contacts the surfaces.The friction created by rotating the tool heats and eventually plasticises the component material, mixing it to form a bond in the joint gap as the tool, under constant pressure, continues creating a high-quality weld seam along the programmed path. Once the process starts, the Siemens CNC logs the entire workflow.
For further information www.heller.biz

Five-axis machining centre is automation-ready

A new, horizontal-spindlefive-axis machining centre is now available from DMG Mori that the company says can maximise productivity when machining complex workpieces weighing up to 1 tonne. The robust INH 63 has a working volume of 1070 mm diameter x 1000 mm high and a maximum pallet size of 630 x 630 mm. Due to its compact dimensions, it offers easy integration into automated production systems.

Dies, moulds, battery boxes for electric vehicles and aerospace valve bodies are typical components that the machine might produce. Its stable design with a symmetrical structure optimised by FEM and twin ballscrews in all orthogonal axes, promotes precise and dynamic milling. Magnescale linear encoders result in high positioning accuracy, while reliable cooling of the ballscrews and other sources of heat suppresses thermal displacement and changes in the machine structure.

Compared with the previous model, the INH 63 offers 65% more cutting capacity. For five-axis machining, the INH 63 swivels the rotary table from + 45 to -195°, with direct-drive motors providing speeds of 90 and 30 rpm respectively. The PowerMaster spindle delivers 12,000 rpm, 808 Nm and 85 kW, while a version with up to 16,000 rpm or 1414 Nm at 8000 rpm is optional for heavy-duty cutting. For Master spindles, DMG Mori provides a warranty of 36 months with no run-time limit.

The wheel magazine, which offers 63 tool positions as standard, is expandable to six wheels, providing space for 363 tools up to 320 mm in diameter by 700 mm long and weighing 35 kg (optionally 50 kg). The high capacity allows long periods of autonomous operation if integrating a large pallet storage solution.
For further information www.dmgmori.com

Recycling initiative supports circular economy

Metal cutting expert Sandvik Coromant, together with the wider Sandvik Group, is launching an upgraded tool recycling scheme. Building on the success of its existing buy-back programme, the new scheme will make the process of repurposing worn carbide tools easier for customers, while also boosting material circularity across the supply chain.With the scheme, customers can sell their worn-out tools to Sandvik Coromant, which then extracts and reuses the materials in the production of new cutting tools. It is possible to recycle up to 95% of a used carbide insert. Rollout to all customers will take place by 2025.
For further information www.sandvik.coromant.com

Walter introduces WL17 indexable inserts

Cutting tool specialist Walter has expanded its WL copy-turning system with the introduction of WL17 indexable inserts for Swiss-type automatic lathes and small diameter machining. Used on the W1011-S-P external turning toolholder, which is also a new arrival (along with W1210/W1211 boring bars), they bring the benefits of the existing WL25 inserts to smaller dimensions.

The W1011-S-P toolholder has a square shank that is available in the most common shank sizes of 12 x 12 mm and 16 x 16mm. They are for use on automatic lathes and multi-spindle turning centres. Walter says it is the only manufacturer to offer a turning system for automatic lathes with positive engagement and three-edge turning inserts.

As with the WL25 turning inserts and toolholders, the smaller indexable inserts facilitate equally high cost efficiencies, thanks to the three cutting edges, high stability and 50% improved indexing accuracy in comparison with ISO inserts. The targeted Walter precision cooling on the rake and flank faces also increases tool edge life.

When it comes to internal turning, the inner diameter (Dmin) of the workpiece is often a limiting factor. ISO turning inserts, such as the VBMT11, only have two cutting edges and are applicable at a 93° approach angle from a Dmin of 22mm. By contrast, the new Walter boring bars W1210 and W1211 with WL17 inserts are suitable for internal turning from Dmin 18 mm, while also sportingone more cutting edge.

Furthermore, the operator can use the indexable inserts for both forward and reverse turning. Just like all WL inserts, WL17 inserts can be used in a neutral, right-hand and left-hand configuration, and feature the latest cutting tool coatings, such as Tiger•tec Gold.
For further information www.walter-tools.com

Guhring mould and die range hits the spot

Guhring is releasing a range of tools especially for companies working in the mould and die industry. Among the stand-out performers is the G-Mold milling line, which allows manufacturers to benefit from longtool life and optimal component surfaces.

According to Guhring, the G-Mold milling series maximises tool life when machining materials up to 65HRc. With the new Guhring Signum and Perrox coating technologies, alongside an ultra-hard carbide substrate, G-Mold demonstrates extended tool life and high levels of machining performance. Indeed,further gains are available thanks to the Guhrojet peripheral cooling system that delivers through-tool coolant or compressed air to remove swarf.

G-Mold milling cutters are available in ball-nose, torus, finishing, radius finishing, universal and high-feed variants, all of which incorporate micron-precision radius accuracy. Three prominent arrivals among the range include the new 55 and 65 G-Mold Series ball-nose tools, and the high-feed range.

The new G-Mold 65B series of high-precision two- and four-flute ball-nose cutters for machining materials up to 65HRc incorporate a radius contour tolerance of ±0.005mm to ensure component contour accuracy and repeatability. The cuttersfeature centre-cutting geometry, and 25° flute and neck clearance for extended reach applications.

Alongside the G-Mold 65B, is the new G-Mold 55B series. More of an all-rounder, the G-Mold 55B is suitable for machining steel, stainless steel, cast iron, super alloys and hard materials up to 55HRc.

For mould tool companies that demand the epitome of high-performance cutting, the G-Mold 65 HF series is for high-feed roughing with low depths of cut and maximum feed rates to optimise metal removal rate. The G-Mold 65 HF high-feed series incorporates Guhring’s Guhrojet peripheral cooling from 1 to 3mm diameter with central through-coolant for 4mm diameter and above.
For further information www.guhring.co.uk