Schrode relies on Vollmer machines

Just 25 km lies between Ehingen-based tool manufacturer Schrode CNC-Werkzeugschleiftechnik and Biberach-based sharpening machine specialist Vollmer.

Both companies have had sharpening in their blood for generations: Vollmer develops grinding and erosion machines, while Schrode manufactures cutting tools for metals, composites or wood. Schrode’s list of customers includes companies from the automotive, tool manufacturing, mechanical engineering and medical technology sectors. To machine its carbide tools, the toolmaker uses two Vollmer VGrind 360 grinding machines with automation solutions, making true 24/7 unmanned production possible.
“At the core of our company today is a highly motivated team of 10 employees, combined with my father’s experience and my youthful enthusiasm,” says Christian Schrode, CEO at Schrode CNC-Werkzeugschleiftechnik. “Sharpening has been in our blood for five generations, and it has made us a reliable and flexible partner in the fiercely competitive tool-sharpening technology market.”
Schrode develops carbide-tipped tools such as milling cutters, drills, step drills and special tools with diameters of 0.2 to 100 mm. Batch sizes range from 1 to 5000-off.
“One of our strengths is the production of individual special tools that we develop in collaboration with our customers,” says Schrode. “We believe that it is important to cover the entire value-added chain when it comes to CNC tool grinding, from designing the tools and manufacturing, right through to aftersales services, such as regrinding.”
To manufacture its carbide cutters, two years ago Schrode opted to invest in two Vollmer VGrind 360 tool-grinding machines. With the HP 160 automation solution, Schrode can produce its tools around the clock in an unmanned operation. Thanks to the two vertically arranged spindles, the VGrind 360 enables efficient machining to be carried out on multiple levels, which can reduce non-productive times.
For further information

ActOn Finishing partners with Gpainnova

As part of its growth plans, ActOn Finishing is launching a new partnership with Spanish industrial company, Gpainnova. The partnership will enable ActOn to supply DLyte surface finishing technology to the manufacturing sector, including the healthcare, aerospace, automotive, 3D printing and motorsport industries.

The DLyte machine combines grinding and polishing in a one-step process to produce smooth and shiny finished parts. Applications include metal components which require high performance or superior finishes, made from materials such as steel and stainless-steel, cobalt chrome, titanium, nickel, and other common metal alloys.
DLyte technology is the first dry electropolishing system of its kind, and the collaboration is set to have a huge impact on the British manufacturing sector by reducing polishing times by around 75%. The new polishing concept will also improve the corrosion/oxidation resistance, lifespan and friction of a part.
Sid Gulati, operations director at ActOn Finishing, says the DLyte fits perfectly with the firm’s existing range of mass finishing products: “We presently manufacture all surface finishing machines in the UK, so distributing the DLyte will complement our current offering as we look to grow the business. We’re confident that through this collaboration we can offer an advanced process solution and help our customers overcome challenges in finishing their components. Already we have added the DLyte 100I to our test lab so our clients can try out the new technology.”
For further information

Grinding wheel for circular saws

Lach Diamant has produced a grinding wheel for the tooth-face grinding of circular saw blades that is said to be more cost-efficient while maintaining high precision. The novel carrier system with 3D geometry and extended grinding layer surface is said to allow for effortless grinding of even the smallest tooth gaps.

Until now, the grinding of rake surfaces on carbide-tipped saws frequently fell short of requirements, especially regarding stability and efficiency. According to Lach Diamant, the new DragonFly grinding wheel offers higher in-feeds and feed rates to reduce grinding times, while producing high-quality, even rake surfaces without any ‘buckling’. Indeed, the vibration-absorbing and stable base body presents another innovation.
The DragonFly grinding wheel provides steady and secure grinding of carbide-tipped saws, as one user confirms: “The DragonFly wheel grinds without any problems, is very precise and has a significantly higher lifetime than all previous wheels.”
The DragonFly wheel (for tooth-face grinding) is accompanied by the DragonFly Back Cruiser for back grinding as well as the DragonFly Flank Cruiser for side grinding (from left to right).
DragonFly wheels are based on diamond abrasive technology. For many years, diamonds – preferably polycrystalline synthetic diamonds (PCD) – have been proven superior to carbide in machining. PCD offers high levels of wear protection, allowing users to profit from its elevated hardness.
For further information

Virtual Timesavers showroom now open

Launched to coincide with the arrival of its latest deburring, edge rounding and finishing machine – the 22 series WRBW – the Timesavers online virtual showroom provides access to all the information customers may need, including video tours of each machine.

While face-to-face meetings have proved difficult, if not impossible during the COVID-19 pandemic, this online portal provides potential and existing customers with the information they need to move towards a solution for efficient sheet metal processing.
Although the complete Timesavers product range is available to view in the online showroom, the current focus is on its latest development, the 22 series 600 WRBW, which combines all of the technological and mechanical developments in the larger 32 and 42 series deburring machines, such as a uniform result, even wear of the tooling, high production capacity, and industry 4.0 functionalities in a 600 mm wide platform. The 22 series WRBW is now the company’s most compact rotary brushing machine, and is said to deliver premium Timesavers deburring, rounding and finishing results.
Suitable for customers with smaller production demands and associated budgets, the 22 series WRBW is constructed with a vacuum belt to transfer parts through the first abrasive belt to remove burrs. Then, processing by the four rotary brushes is performed to round external and internal edges (and remove laser oxide skin if specified), with a second belt providing the surface finish requirements to deliver fully deburred and rounded parts. The machine’s arrival marks the completion of the Timesavers RB range for premium deburring and rounding at every budget and capacity.
For further information

Are grinder guards over-designed?

Guards on grinding machines are particularly important for ensuring operator safety. Grinding wheels seldom burst, but when they do, there is a great risk of serious injury to the machine operator. Recent studies suggest, however, that the enclosures commonly used in gear grinding machines, for example, could be over-designed.

Investigations conducted by the VDW (German Machine Tool Builders’ Association) and the Institute of Machine Tools and Factory Management (IWF) at TU Berlin, reveal that it is possible to use safety guards which are up to 70% thinner, depending on the width of the grinding wheel. These findings are now leading to changes in ISO standardisation.
The minimum wall thicknesses for safety guards are specified in ISO 16089. For example, there is a directly proportionate link between the requirements concerning primary protective covers for gear grinding machines and those for the full enclosures located further away. The reason is that no specific safety precautions were initially specified for the safety guards of gear grinding machines as they were not explicitly included in the preceding standard, EN 13218. However, this proportionate scaling has been repeatedly questioned, including by the JMTBA, as it results in overdesigned polycarbonate safety guards and screens.
“Our burst and impact tests showed that the thickness of the enclosure wall can be reduced by up to 70%, depending on the width of the grinding wheel,” explains Simon Thom, group leader for machine tool technology at IWF (TU Berlin). “This is very good news for the machine tool manufacturers, who are keen to avoid excess weight in their machines. Reducing the thickness of a sheet steel housing by half a millimetre, for example, will save 4 kg/m2 in weight.”
For further information