News

Dec
2016
GLOBOIDAL CAMS

Globoidal cams are found in indexing gear boxes. These high-precision, purely mechanical components are the heart, or you might say the “brain”, of this type of gear unit. They are capable of “storing” the cycle frequency, movement, acceleration ramp and position dwell time. Indexing gear boxes are used not only for filling, portioning and packaging, but can also carry out highly precise assembly work. You would think that nowadays reduction gear units controlled by servomotors would be the first choice. However, this is not the case, as indexing gear boxes have their own advantages. By mechanically coupling multiple of these units together,even of different types, it is possible to implement a very complex process with only one drive motor, all with perfect coordination. They largely do away with the need for expensive electronic control components that are likely to be damaged. Obviously the cams must engage in the globoidal cams with no play. Since multiple cams are generally engaged at the same time, even the slightest deviation in the curves will cause the gear unit to jam. The globoidal cams are initially milled with an allowance. After the hardening process, they are ready for the grinding process. Traditionally an eccentric grinding device is used for this. If the aim is to achieve good surface quality, then this old process is very slow and also inflexible. Manual reworking is generally required. SCHNEEBERGER follows a different, flexible approach for this. It is based upon the machine data from the milling process. From this information, our grinding software QUINTO calculates both flanks of the cam separately. The two grinding paths can therefore be modified individually, e.g. in order to optimise the beginning of the curve. A dressing unit and a wheel probe are meaningful options when it comes to process optimisation. Depending on the size of the workpieces and the diameter of the cams, several SCHNEEBERGER machine types can be equipped for this application. normaNGC, geminiNGM and corvusGDS are already in service with manufacturers of indexing gear boxes.

Dec
2016
M.B.S NV – Mark Barberien

The story begins in 1994 in the village of Onze-Lieve-Vrouw-Waver, between Brussels and Antwerp. The owner started production of standard and special carbide tools in a garden spot with an area of just 35 m2. At the time, the means of production included one universal, one cylindrical and one drill bit grinding machine. Soon the young company had customers throughout Belgium and the surrounding countries. As the volume of orders increased, and due to the increasing quality requirements, Mark decided in 2005 to invest in a SCHNEEBERGER CNC machine. He chose a normaCFG. This universal tool grinding machine was the ideal match for his existing mix of products and opened up new possibilities. In particular, Mark points to the benefits of the QUINTO programming software, which allows him to produce the widest selection of tools flexibly and easily. He also liked the user-friendly integrated ISO programming right away. This makes it possible to incorporate cylindrical grinding operations on the tool grinding machine, or implement undercuts, whistle notch, slots for feeding the cooling channels and much more. The commissioning of the new CNC machine in 2006 resulted in increased productivity and led to further growth. Customers appreciated the consistency and quality with which their orders were completed and further expanded their partnership with M.B.S NV. The normaCFG also had to operate unmanned from this point on, and thanks to the modular construction of SCHNEEBERGER machines, there was no problem retrofitting the automatic handling system. Now it was possible to exploit the remaining nights and weekends too. M.B.S NV was still on a growth trajectory. In 2012, the decision was made to further expand production capacity. Things had become too tight in the garden spot and new premises were needed. It would take a while until the right property could be located. Then in 2015 construction could begin on the new factory building, which was only 3 km away from the old location. Mark Barberien was already planning for the future and created the new building with the necessary room to spare. In the meantime, he had also ordered one of the new normaNGC machines. Mark’s good experience with his first machine counted in this decision: the robustness and reliability of the machine, the high material removal rate, the auton-omous operation of the normaNGC, its compact design, and last but not least the reliable service he had received from SCHNEEBERGER. In 2016, at the same time the new factory space was completed, the new machine was also delivered to M.B.S NV. With the normaNGC, the company now has the latest CNC tool grinding technology. With its automatic loader and VARIO pallet, this machine is also designed for unmanned operation. Moreover, it can perform cylindrical grinding operations at up to 800 rpm. This allows stepped drill bits, reamers and stepped reamers to be produced all in one setting, in the best possible quality. The surface finish achieved can no longer even be distinguished from a centerless ground blank. With their CNC grinding machines, M.B.S can now produce standard and special tools for drilling machines, stepped drills, milling cutters, profile cutters and inserts with even more flexibility. The cornerstone for the future expansion of this successful firm has thus been laid.

Dec
2016
Multiple Step Drill – with Qg1

Creating standard and special step drills in the new Qg1 software is simple, while also offering a great deal of flexibility. On the one hand, it is possible to create practically any number of steps, so far the blank can accommodate it. To do so, additional steps are simply added and basic data such as diameter, length, step angle and the step type is specified. A choice of straight, S-shaped, convex, concave or profiled steps is available for advanced users. The input values for the step drill are visible immediately in 2D, and the full drill is shown in 3D. The currently edited shape part is highlighted in the cross-section view [Fig.1]. On the other hand, subland step drills are quite special. Each step section has its own rake angle and chip space. Now, these can be adapted individually for each step, if necessary. In addition, it’s been worked on clearance design. Now it is possible to equip the drill with multiple cylindrical margins and a middle clearance between them [Fig.3]. Of course it can be done on an individual basis for each step and with twist, if desired. There is also an option to insert a separate cutting face for the shaping step, which is called STEPGASH [Fig.4]. With the conventional method, the steps are simply implemented along the contour, which produces profile distortion in this area. With an additional cutting face along the step, the contour is strengthened, profile distortion is eliminated, and due to the additional rake angle the chip removing characteristics are also improved. The new step drill definition, model and process calculation are performed entirely in 3D, based on geoMod (solid model), and provide a great deal of flexibility in the design of stepped tools.

May
2016
GrindTec 2016 - A Look Back

Our first time was 18 years ago! In 2016, we attended GrindTec in Augsburg as an exhibitor for what is now our tenth time. In this, our anniversary year as a pioneer and innovator, we received the GrindTec marketing prize sponsored by AFAG and the Trade Association of German Precision Tool Grinders (FDPW) for exemplary and sustained trade fair marketing. We are grateful for the award. Time and again at fairs, we enjoy animated shop talk at our booth with our friends, customers and all other visitors. Downsizing is now reality in the development of state-of-the-art grinding machines. With the new ariesNGP, we were able to introduce another world first this year. But the new machine types siriusNGS and geminiNGM were also exhibited at a trade fair in Germany for the first time. There were a lot of new things to discover for the visitors to our booth. We were pleased with the tremendous interest and many visitors. Our sincere thanks to everyone once again.

May
2016
New talent for SCHNEEBERGER tool and cutter grinding machines

Another member of the new grinding machine range could now be introduced at GrindTec 2016: ariesNGP Downsizing was what the designers were after here. The “new talent” was to be small and inexpensive, but also combined with the “genes” of its “big brothers”. It might be a slim 99 cm wide, but it’s no lightweight. The new product’s 1700 kg weight gives it stability. With a total height of 1 m 76 cm, it has attractive proportions. With the ariesNGP, access to 5-axis CNC tool grinding is not a compromise. The machine has all the ingredients needed for an outstanding grinding result. Stability, high-resolution axes, the latest generation of control unit, an efficient coolant circuit, high concentricity of the workpiece holders, a high-performance grinding spindle and grinding software that calculates the grinding paths very precisely to 13 decimal places. The stability is achieved thanks to the robust spheroidal cast iron monoblock design. This gives the machine kinematics the necessary internal strength. All axes can be equipped with ultra-precise measurement systems. The longitudinal and vertical axes along with the cross slide have a resolution of 50 nm, while the resolution of the workholder is 0.0001º. The modern CNC control unit from the FANUC 3 x series guarantees the most precise and fastest operation of machine axes. What is more, it manages without an external keypad in keeping with the modern age. As with a pad, this is displayed on the 15-inch touch screen. The USB 2.0 interface ensures straightforward communication with the outside world. The ariesNGP is also breaking the mould in coolant supply. The coolant filter with 200-litre tank is integrated into the machine design, which saves space. The robust HSK 80 workpiece holder ensures a precise fit of the workpieces and high concentricity. With 5 kW of power, the SCHNEEBERGER grinding spindle has enough reserves for even a large removal rate. Operation of the machine with the new CAD/CAM grinding software Qg1 is intuitive and it makes programming even complex grinding tasks child’s play. But the new grinding machine’s extremely compact design is not at the expense of axis travel distances. With strokes of 420 mm in X direction, 360 mm in Y direction and 270 mm in Z direction, considerable dimensions can be processed. It is thus possible to grind tools with a length or diameter of 250 mm. With the integrated loader and a 200 x 200 mm pallet, the machine even runs automatically.

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