Schunk boosts wheel handling

Haas Schleifmaschinen is expanding the range of possibilities of its Multigrind CA and CB grinding machines with a fully automated compact storage rack for up to 70 grinding wheels and 20 coolant protectors. A pre-finished linear axis system from Schunk is the key to flexible grinding wheel handling in minimum space.

Using the Schunk system, the shortest changeover time for an individual combination of wheel and protector within the storage rack (during processing time) is just 28 seconds, while the actual change on to the machine is carried out in a time of 10 seconds. Furthermore, milling cutters can be handled using the system, helping users to machine small contours or radii that cannot be reached with grinding wheels. As a safety door interface separates the machine from the storage rack (to protect it from oil mist), a shuttle table is used instead of the conventional machine tool changer.
The interfering contour-optimised axis system was designed by Schunk, and includes valve terminals, cable tracks and the connection to central lubrication. Two multi-tooth guided Schunk PGN-plus universal grippers take on the varied handling of the grinding wheels and coolant protectors. The gripping technology ensures that the tools are safely held in the event of a power failure.
With the aid of a Schunk swivel unit SRU-plus, the bottom gripper can be used both in combination with grinding wheel and coolant protector, and for removing and filling the individual grinding wheels and milling cutters.
In the Z-direction, a Schunk Delta 240C spindle axis is used, which is fitted with a rod lock, extendable spindle and shaft encoder.
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Blank preparation grinder introduced

Capable of achieving a surface finish better than 0.2 Ra with run out of less than 2 µm, the new four-axis Anca CPX Linear blank preparation grinder uses the pinch-peel method of grinding.

Simon Richardson, product manager at Anca, says: “We have taken the best aspects of our technology to build a fantastic machine. For example, our specially designed polymer concrete base provides the utmost stability in our grinding process, so we took that and used it in the CPX Linear model.
“We are known for our ongoing dedication to research, as well as our commitment to ensure that Anca technology surpasses customer needs,” he adds. “This is another major milestone in our approach, providing a complementary machine for the full grinding process. Our customers asked and we listened; designing our own blank preparation machine.”
Anca’s LinX linear motor technology for axis motion (X, Y and V axes), in conjunction with linear scales, is designed for a lifetime of operation in harsh grinding environments. LinX motors have a cylindrical magnetic field, which means there is no additional down force on the rails or machine base.
With no temperature variations (meaning no need for a separate chiller unit), and being sealed to IP67, there is minimal wear and tear so that machine accuracy is retained over the lifetime of the Anca CPX Linear.
With a peak power of 43 kW, the grinding spindle for roughing uses a 250 mm diameter wheel, ensuring high-volume stock removal in a short cycle time. The finishing spindle uses a 150 mm diameter wheel supplying a peak power of 9.7 kW.
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Top grades for hard-part turning

Sandvik Coromant is releasing two grades for interrupted hard-turning operations: CB7125 and CB7135. Available immediately, the grades complete the company’s offer for hard turning, complementing the existing CB7105 and CB7115 grades.

The latest Sandvik Coromant grades provide the ability to perform medium-to-heavy interrupted cuts and remove the hardened layer (depth of cut up to 2 mm) in case- and induction-hardened steel components, typically for the automotive industry. Here, CB7125 and CB7135 offer longer and more consistent tool life, good levels of surface finish and consistent dimensional tolerances, says the company.
CB7125 and CB7135 are optimised for turning steel materials with a hardness of 58-62 HRc. Designed for medium intermittent cutting, CB7125 features a newly developed PVD coating that provides improved wear and fracture resistance for extended tool life. This grade, which contains medium CBN content, is suitable for the turning of shaft splines and shafts with chamfered oil holes or pockets. Further applications include the facing of gears, the hard-to-soft turning of crown wheels, and the removal of hardened layers.
The CB7135 grade is pitched at the longitudinal turning of gears and shafts with un-chamfered keyways or pockets, as well as CV joint components such as the inner/outer race and cage. Featuring a high CBN content, the grade is said to offer high fracture resistance and predictable machining results.
Available for T-Max P, CoroTurn 107 and CoroTurn TR tooling systems, the grades come in both positive and negative basic shapes, with various edge preparations.
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Okuma opens plant in Taiwan

Okuma, which is represented in the UK by NCMT, says it has put an advanced manufacturing facility into operation in Taiwan.

Using experience from its smart factories Dream Site 1 and Dream Site 2 in Japan, Okuma has applied the same level of automation and IoT connectivity to its new Taiwanese plant.
To achieve a production capacity of 300 machine tools per month, the facility utilises Okuma’s Connect Plan smart manufacturing solution to link machines, monitor operations and progress, and provide accurate work instructions through the IoT. Real-time data analysis and advanced visualisation of everything from machine utilisation to assembly work help maximise productivity and evolve manufacturing on a daily basis.
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Growth matched with investment at LC Precision

Formed in 2013 when Lee Coles bought a one-man machining business, Weymouth-based LC Precision Engineering has achieved sales growth in excess of 600% over the past five years.

The company works across a variety of sectors, including defence, motorsport, nuclear and electronics, mainly focussing on work that could be produced on its three-, four- and five-axis vertical machining centres. To further develop its offer, the company has now invested in new turning capacity in the form of an XYZ SLX 1630 ProTurn lathe.
With five employees, including managing director Lee Coles, LC Precision Engineering may be a small business, but it has big ambitions. Over £175,000 has been spent on new equipment in the past two years.
The XYZ SLX 1630 ProTurn lathe is described by Coles as being “in a different league” when compared with his previous experience on manual lathes. While the SLX 1630 may be the entry point for ProTurn lathes, it comes with a cast bed and base, 400 mm swing over bed capacity, 760 mm distance between centres, and a 5.75 kW, 150-2500 rpm constant surface speed spindle.
The SLX ProtoTrak control was key in the decision by Coles to go with XYZ Machine Tools for his move into CNC turning: “The control system definitely sold the machine to us. We specialise in lower volume work with seven out of 10 jobs being one-offs. Therefore, the ability to easily programme complex forms and be confident that we will achieve a good part first time, every time – thanks to features like TRAKing and Do-One – makes a huge difference.”
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