Rollomatic, a leading machine tool manufacturer based in Le Landeron, Switzerland, mainatins its global leadership position by highlightin the new GrindSmart® model 630XW machine with new and innovative capabilities relating to the production grinding of solid carbide boring bars and other stationary cutting tools. Boring bar grinding on the Rollomatic 6-axis tool grinding machines offers exceptional flexibility in comparison to conventional single-puropose grinders. With its 6 fully interpolating CNC axes and 6-station wheel/nozzle changer, the machine can easily be adapted for individual boring bar designs, both for short and long runs. The compact and versatile design allows full interchangeability between boring bars, inserts and round tools.
The following operations can be perfomed on the GrindSmart® series in one operation including flipping the tool:
- Profile grinding
- Grinding of rake face
- Grinding of coolant flat
- Grinding of neck
- Other brand-dependent features
While the machine is able to grind any large-size boring bar, its capabilities extend to miniature turning tools, boring, threading, grooving and facing tools. Both right hand/left hand and ahead/behind center can be produced with equal ease. Rake angles can be ground in 2 planes. Additionally, quick-change features also can be added to the grinding operations.
Compared to dedicated insert grinders, the GrindSmart® 6-axis series together with the wheel.nozzle changer offer the highest available flexibility for grinding a variety of boring bars and other stationary cutting tools, while maintaining the ability to switch over to round-shank tools within minutes.
- Radius contour accuracty deut to mechanical and software features as low as .0001" (2 microns).
- Pick-and-place robot, so that the tools do not get damaged after drinding.
- Wheel and nozzle changers with 6 positions or 16 positions. Each wheel pack can accomodate up to 4 wheels.
- In-process rotary dressing, or automatic sticking device available.
- Linear motion control on CNC axes.
- Desktop tool design software with 3D tool simulation and 3D machine animation with collision warning. High level of functionality, speed, freedom in tool design and user-friendliness.
Related Glossary Terms
Enlarging a hole that already has been drilled or cored. Generally, it is an operation of truing the previously drilled hole with a single-point, lathe-type tool. Boring is essentially internal turning, in that usually a single-point cutting tool forms the internal shape. Some tools are available with two cutting edges to balance cutting forces.
- boring bar
Essentially a cantilever beam that holds one or more cutting tools in position during a boring operation. Can be held stationary and moved axially while the workpiece revolves around it, or revolved and moved axially while the workpiece is held stationary, or a combination of these actions. Installed on milling, drilling and boring machines, as well as lathes and machining centers.
- computer numerical control ( CNC)
computer numerical control ( CNC)
Microprocessor-based controller dedicated to a machine tool that permits the creation or modification of parts. Programmed numerical control activates the machine’s servos and spindle drives and controls the various machining operations. See DNC, direct numerical control; NC, numerical control.
Fluid that reduces temperature buildup at the tool/workpiece interface during machining. Normally takes the form of a liquid such as soluble or chemical mixtures (semisynthetic, synthetic) but can be pressurized air or other gas. Because of water’s ability to absorb great quantities of heat, it is widely used as a coolant and vehicle for various cutting compounds, with the water-to-compound ratio varying with the machining task. See cutting fluid; semisynthetic cutting fluid; soluble-oil cutting fluid; synthetic cutting fluid.
Removal of undesirable materials from “loaded” grinding wheels using a single- or multi-point diamond or other tool. The process also exposes unused, sharp abrasive points. See loading; truing.
- flat ( screw flat)
flat ( screw flat)
Flat surface machined into the shank of a cutting tool for enhanced holding of the tool.
Machining operation in which material is removed from the workpiece by a powered abrasive wheel, stone, belt, paste, sheet, compound, slurry, etc. Takes various forms: surface grinding (creates flat and/or squared surfaces); cylindrical grinding (for external cylindrical and tapered shapes, fillets, undercuts, etc.); centerless grinding; chamfering; thread and form grinding; tool and cutter grinding; offhand grinding; lapping and polishing (grinding with extremely fine grits to create ultrasmooth surfaces); honing; and disc grinding.
Machining grooves and shallow channels. Example: grooving ball-bearing raceways. Typically performed by tools that are capable of light cuts at high feed rates. Imparts high-quality finish.
- pick-and-place robot
Simple robot or piece of hard automation that is capable of the simple actions of picking an object from a fixed point and placing the object at another fixed point.
Angle of inclination between the face of the cutting tool and the workpiece. If the face of the tool lies in a plane through the axis of the workpiece, the tool is said to have a neutral, or zero, rake. If the inclination of the tool face makes the cutting edge more acute than when the rake angle is zero, the rake is positive. If the inclination of the tool face makes the cutting edge less acute or more blunt than when the rake angle is zero, the rake is negative.
Process of both external (e.g., thread milling) and internal (e.g., tapping, thread milling) cutting, turning and rolling of threads into particular material. Standardized specifications are available to determine the desired results of the threading process. Numerous thread-series designations are written for specific applications. Threading often is performed on a lathe. Specifications such as thread height are critical in determining the strength of the threads. The material used is taken into consideration in determining the expected results of any particular application for that threaded piece. In external threading, a calculated depth is required as well as a particular angle to the cut. To perform internal threading, the exact diameter to bore the hole is critical before threading. The threads are distinguished from one another by the amount of tolerance and/or allowance that is specified. See turning.
Workpiece is held in a chuck, mounted on a face plate or secured between centers and rotated while a cutting tool, normally a single-point tool, is fed into it along its periphery or across its end or face. Takes the form of straight turning (cutting along the periphery of the workpiece); taper turning (creating a taper); step turning (turning different-size diameters on the same work); chamfering (beveling an edge or shoulder); facing (cutting on an end); turning threads (usually external but can be internal); roughing (high-volume metal removal); and finishing (final light cuts). Performed on lathes, turning centers, chucking machines, automatic screw machines and similar machines.