INTERNATIONAL NEWS

Major progress in external reaming of turned parts

The mass production of precise turned workpieces on multi-spindle automated lathes is subject to its own rules. In a hotly contested market, it is necessary to take every tiny opportunity for cost reduction, as Oberrindal-based WE Schultz, a customer of cutting tool specialist Mapal, can testify.

“As a true mass producer of comparably simple parts, we have to be able to compete in terms of price and quality with competitors from Asia here in Switzerland,” says Alexander Jaksch, deputy head of the turning shop.

A key lever in this ideology is the support of external partners such as cutting tool suppliers.
“Ultimately, the tools for a machine tool are as important as the tyres on a car,” states Jaksch.

The potential available here has been demonstrated to decision-makers at WE Schultz by a custom tool developed and subsequently optimised by Mapal.

“This project was about a part that seemed rather simple on the surface, a sleeve turned from solid with a diameter of almost 15 mm and a length of 10 mm,” says Emil Hugentobler, machine fitter at the Oberrindal plant. However, there are two crucial sticking points: a narrow diameter tolerance of 14.7 mm +12/-2 µm, and exceptionally low surface roughness of only Rz = 6 µm.

“In this situation we became aware of Mapal’s external reamers, particularly a custom tool for external reaming,” recalls Alexander Hildt,head of manufacturing. This external reamer is equipped with three guide pads and an adjustable indexable insert. The key advantage of the solution is that the outer dimensions of the workpiece are represented by the inner dimensions of the tool. Therefore, machine-related influencing factors such as increased play in the machine kinematics or the bearing of the spindle or chuckbecome practically irrelevant.
For further information www.mapal.com

New grades facilitate high feeds on tough metals

Horn has introduced two carbide grades for inserts used in its DAH82 and DAH84 high-feed milling systems, enabling their use for a wider range of materials. The expansion gives customers the ability to choose grades best adapted to their applications.

The new SC6A grade is suitable for machining materials in the ISO M group (stainless steels), as well as ISO S materials (superalloys) as a secondary application. The new IG6B grade is for machining ISO P materials (steels), while it is also suitable as a multi-purpose grade for other material categories, as is the pre-existing SA4B substrate.

With eight usable cutting edges, the sintered inserts offer a competitive price per cutting edge and hence economical machining. The positive geometry ensures a soft, quiet cut as well as good chip flow. Notably, the large radius of the insert’s main cutting edge also promotes a soft cut and,alongside an even distribution of cutting forces, ensuring long tool life.

In terms of machining parameters, the maximum cutting depth is 1 mm (DAH82) and 1.5 mm (DAH84). The DAH82 variant is available as an end mill and as a screw-in milling cutter in the following diameters: 20 (z = 2), 25 (z = 3), 32 (z = 4), 35 (z = 4) and 40 mm (z = 5), where z denotes the number of inserts. As a shell mill, it is available in diameters of 40 (z = 5), 42 (z = 5) and 50 mm (z = 6).

For diameters of 50 mm and more, the larger DAH84 system is first choice. The variants are available only as shell mills in the following diameters: 50 (z = 4), 52 (z = 4), 63 (z = 5), 66 (z = 5), 80 (z = 6), 85 (z = 6), 100 (z = 7) and 125 mm (z = 8).
For further information www.phorn.co.uk

Sustainability in DNA at GFMS

Machine tool manufacturerGF Machining Solutions aims to become a sustainability leader and, to achieve this ambition, has created three inter-connected pillars within its new business strategy.These pillars cover:product sustainability;climate andresource planning; and looking after the wellbeing of its employees. The first pillar requires constant innovation to ensure products and services have sustainable lifecycles, whilethe second pillar translates into decoupling resource consumption from growth. The third pillarhas a focus on creating diverse, engaging and safe workplaces.
For further information www.gfms.com

Ball valve specialist installs IMET bandsaw

Dafram SPA, a specialist in the production of ball valves for the oil industry, chose the IMET XT4 automatic bandsaw to help boost its workflow and production requirements. IMET says it was extremely happy to provide a reliable and efficient working tool to such an important partner in a market (valve construction) where precision is crucial. IMET machines are available in the UK from Addison Saws.

XT series automatic double-column bandsaws offer full material cuts up to 560mm. All the machines of the XT series are equipped with an integrated feeder and 10” touchscreen display that includes automatic cutting parameters and a materials library, allowing users to start a cutting cycle in just few minutes.

Regarding the XT4 model, clamping vices move at the same time to ensure optimum clamping of the material. Furthermore, bars which are not completely straight can advance through the system without issue.All vice pressures are adjustable, while the system also allows the vices to ‘back off’, thus avoiding the blade rubbing on the cut surface during the ascent of the saw frame for the next cut.

TCT bandsaw blades are suitable for this machine and it features hydraulically pressured TCT blade guides for maximum precision and squareness of cut. A further feature are adjustable lateral roller bearings that take the blade twist load prior to entry into the guides. The moving guides position automatically close to the cutting area, again for maximum precision. As a point of note, the machine software controls a hydraulic cylinder to tension the sawblade accordingly, while an automatic trim cut option is also available.

Finally, if the material has an acceptable pre-sawn face, it will locate accurately and automatically relative to the blade ‘zero’ position.
For further information www.addisonsaws.co.uk

Family succession at Behringer

Last month, Rolf Behringer (68) handed over his executive duties at saw manufacturer Behringer GmbH to his son Andreas Behringer (31), who will subsequently manage the company as second managing director together with Christian Behringer (54).

Following 44 years of commitment to the family business, Rolf took over the management from his father Willy Behringer in 1988. He was mainly responsible for the company’s purchasing and commercial operations. During this time, the business also made the transition from a workshop to a steadily growing and internationally active industrial company. Since 2000, he managed the company together with his cousin Christian, who is responsible for technology, sales and marketing. Rolf will continue to be available as a shareholder in an advisory role.

Andreas is the fourth generation to join the management team. After graduating from high school and spending a year abroad, he studied international management in Mannheim until 2015. Andreas started his professional career as a project manager at a service and consulting company near Frankfurt. Over a period of four years, he gained insights into a wide variety of industries and corporations across Germany. In 2020, he joined the family business. Over the coming years, Andreas will focus primarily on HR and sustainability issues in the company.

“My goal is to lead our company into a successful and, at the same time, sustainable future,” he says. “By focusing on people and necessary investments, we can ensure that our family business will continue to prosper for many years to come, offering attractive activities and jobs for future generations.”
For further information www.behringer.net