Turning using HEIZ milling machines

Contents: Turning using HEIZ milling machines. Inputs for the special function Turning. Results of the milling path calculation. Cutter Offset calculation for spherical tools.

Turning using HEIZ milling machines. This special function creates from a section running in the horizontal direction the movements for a turning facility. The section describes a section through the workpiece to be turned. CAD drawing The section in the X/Y level is input into the CAD. For milling, the axes are converted into suitable machine movements. Graphic X > machine X Graphic Y > machine Z
| The direction of turning must be set in the X-direction on the machine. Milling is done with the machine X and Z axes. In the CAD the section to be worked should be input in the range +X and -Y. The highest point of the working should lie at Y = 0. No part of the cutting line may lie above Y = 0! The cutting line must consist of one coherent section. For working off the milling paths are calculated and directly saved in a file using the DIN/ISO export filter for PCNC lathes. This turning equipment can be used only with WinPC-NC.
| The cutting line must consist of one coherent section. Several individual elements are joined by a horizontal line (red) in the Y = 0 level.
Input of the special turning function. After the cutting line has been input completely and correctly, the milling path calculation can be started using the function CAM . PCNC-Lathe.
Tool | Selection of the milling tool from the library. A click on the tool graphic opens the tool input. The milling takes place using this tool. Only technology data from tool are used. An offset calculation to correct the cutter geometry is not included.
Position of cut | Employment and position correction of the cutting line.
Relative | The cutting line is always so offset in Y that the highest point lies at Y = 0.
ABSOLUTE | The cutting line is not offset. Thus more material can be removed even for a smaller turning diameter.
Clearance procedure | Before milling, the cutting line material is removed in layers using the clearance process.
None | There is no exposure of the cutting line.
Row exposure. | The cutting line is exposed by horizontal milling.
Scaled | The cutting line is exposed through scaled lines.
Clearance separation [mm] | Separation of the clearance lines in (graphic) Y - direction.
Following confirmation of the input the milling paths are calculated and saved directly in a file using the DIN/ISO export filter for PCNC lathes. This turning direction can be used only with WinPC-NC. Results of the milling path calculation. hatched clearance movements with cutting line in the X- / Y level. The cutting line lies below Y = 0. Settings: ABSOLUTE + row exposure. Scaled clearance movements with cutting line in the X- / Y level. The highest point of the cutting line lies at Y = 0. Settings: Relative + scaled. Cutter Offset calculation for spherical tools.
Spherical tools. | The milling data creation for woodturning contains no offset calculation. Because the tool works from above (not as a normal mill processing laterally from the side to the contour) a correction for many tool shapes is not possible. Woodturning normally works with a spiky tool (chisel). For a spherical tool you can calculate/design a corrected offset line. The automatic offset calculation in the program needs a closed contour. Therefore the woodturning - line first must completed to a contour, the offset calculation made and at last the supplement lines must removed again. Processing steps for offset calculation (see picture). 1) The woodturning line before a tool offset. 2) The line is completed with an auxiliary construction (3 vectors) to a contour without overlaps. 3) With sphere radius calculated offset contour. 4) The corrected woodturning line after remove the auxiliary construction.
Finished!