NUM CORP. introduced a new software it said provides manufacturers of CNC cylindrical grinding machines with an effective way to incorporate non-circular grinding functions to their products without significant development time and cost.
Non-circular grinding is used in a variety of automated manufacturing applications, such as the production of camshafts, crankshafts, cams, and eccentric shafts. However, it is an extremely complex task, because the non-circular contour leads to constantly changing engagement and movement conditions between the grinding wheel and the workpiece.
NUM has added non-circular grinding functionality to its NUMgrind cylindrical grinding software, which forms an application-specific element of its Flexium+ CNC platform. It is fully compatible with other Flexium software, from release 4.1.20.00 onwards.
NUMgrind simplifies the creation of G-code programs for CNC grinding machines using an intuitive graphical human machine interface (HMI), conversational-style ‘fill in the blanks’ type dialogues, or a combination of the two.
The operator determines the sequence of the grinding process via the HMI and enters the necessary data for the grinding operations, grinding wheels, and dressing operations in the dialogue pages. Programming is simplified because the HMI is supported by a comprehensive library of predefined shapes, which includes eccentric circles, hexagons, pentagons, polygons, Reuleaux triangles, and rhombi. Then, the CNC program is created completely automatically and stored in an executable form.
The closed shape of the workpiece is defined in the XY plane. However, grinding is performed by interpolating or synchronizing the X axis with the C axis (workpiece spindle.) Axial movement in the Z axis also can be accommodated, by means of oscillation or ‘multi-plunge’. The Flexium+ CNC system’s NCK transforms the contour from the XY plane into an XC plane, and calculates the corresponding compensation and in-feed movements, taking the grinding wheel diameter into account. The speed profile is also transformed, so that the speed and acceleration are automatically adapted to suit the physical attributes of the machine.
Learn more at www.num.com
