Walter and Heller sign partnership agreement

Walter AG and Heller Maschinenfabrik GmbH have commenced a technology and development partnership that focuses on integrated customer solutions for the machining industry. The companies aim to test, optimise and market their products through the joint development of sustainable machining processes. Walter has held a strong partnership with Heller for many years, both as a customer and supplier. Several Heller machines are in use at Walter’s technology centres and production facilities.

Heller CEO Dr Thorsten Schmidt says: “Walter is an excellent technology partner with extensive tooling expertise and a wealth of experience in machining. Furthermore, Walter provides the tooling technology that can give our customers a direct productivity advantage in metal cutting. Together with the strengths that Heller brings to the table, we’re able to forge a strong partnership in the areas of development and technology.”
For further information www.heller.biz

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

Sheffield Forgemasters to regain accreditation

Sheffield Forgemasters is positioned to expand into nuclear fabrication after passing a highly testing audit to regain coveted ASME status as a key supplier of heavy forgings and castings to the civil nuclear power market. Ian Nicholls, group technical director, says: “Sheffield Forgemasters has passed the ASME audit to qualify as a Materials Organisation with NPT status. The accreditation is a huge development with enhanced requirements and disciplines embracing all our processes, employees and selected sub-suppliers. The ASME code is the world’s most comprehensive series of guidelines for civil nuclear manufacture.”
For further information www.sheffieldforgemasters.com

Adams slides into three-axis machining

Although a predominantly sliding-head turning machine shop, Adams Engineering (Ilkeston) Ltd has just purchased a Dugard 1000XP three-axis machining centre. Initially founded in the 1950s and run as a single-cam auto machine shop for decades, the business has more recently been taken over by Scott Burrow. Since the takeover, the company moved to new and larger premises three years ago and continued its machine acquisition trail.

Discussing why Adams Engineering has invested in three-axis machining, Burrow says: “Our first venture into milling was down to one of our customers. They kept pressing us to do milling work, so eventually we took the plunge. With the first machine we bought, we were initially just drilling and tapping prismatic parts and putting steps in plates.”

As word got around that the company was undertaking milling work, more enquiries flowed in.

“Due to rising enquiries we bought a larger machine, the Dugard 1000XP three-axis machining centre,” explains Burrow.

The ISO9001-accredited company wanted a machine with a sizeable capacity and a robust platform, which is exactly what the Dugard 1000XP delivers. As standard, the machine has X, Y and Z-axis travel of 1050 x 540 x 560mm to accommodate large parts. It also offers a 27kW BT40 spindle motor, a cartridge belt drive spindle and pre-tensioned twin-nut ballscrews.

“We just thought, why not go big.Today, we are doing work that takes up almost all the entire bed.”

The Dugard 1000XP has X, Y and Z-axis rapid feed rates of 44, 44 and 25m/min, with a cutting feed rate of 20m/min credit to the Mitsubishi CNC control system. Positional accuracy is 0.01mm, while repeatability is ±0.003 mm.
For further information www.dugard.com

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