The information in this section will help you create and edit Ramp Rough Turning operations in your manufacturing program. This type of operation is suitable for machining hard materials using round ceramic inserts, thereby minimizing wear and cutting stress.
The Ramp Rough Turning operation allows you to specify:
The following topics are dealt with in the paragraphs below:
Tooling for Ramp Rough TurningThe following tooling may be used:
Note that the following attributes may influence machining (they are located on the Insert-holder's Technology tab):
These attributes take tooling accessibility into account and may reduce
the machined area. Note that the Insert-Holder Constraints setting does not influence the Entry Flank Angle defined in the operation editor. Geometry for Ramp Rough TurningPart and Stock profiles are required. They can be specified as follows:
The End Limit option allows you to specify a point, line, curve or face to relimit or extrapolate the selected part profile. If a face is specified, the end element is the intersection of the face and the working plane. The position of the end of machining is defined with respect to this element by one of the following settings: None / In / On / Out. Relimiting the area to machine by means of limit elements If you specify a point, it is projected onto the part profile. Orientation for Ramp Rough TurningThe following Orientations are proposed: Internal, External and Frontal (for Face Roughing only). The selected Orientation defines the type of geometric relimitation to be done between the stock and part geometry in order to determine the area to machine. Selected part and stock profiles do not need to be joined (see the following figures).
Frontal machining is proposed for face Ramp Rough Turning. In that case, the minimum and maximum diameters of the area to machine are determined by the stock profile dimensions. For example, in the following figure the area to machine is relimited by the spindle axis because the stock profile is also relimited by the spindle axis.
Part and Stock Offsets for Ramp Rough Turning
Offsets can be positive or negative with any absolute value. The global offset applied to the part profile is the resulting value of the normal, axial and radial offsets. Location and Limits for Ramp Rough TurningThe following machining Locations are proposed:
Orientation and Location settings determine the way the program closes the area to machine. The following options allow you to restrict the area to machine that is pre-defined by the stock and part. You may want to restrict this area due to the physical characteristics of the tool and the type of machining to be done. Maximum Machining Radius (for internal machining)
Axial Limit for Chuck Jaws (for external or frontal machining): Offset defined from the machining axis system. Machining Strategy Parameters for Ramp Rough TurningPath Definition for Ramp Rough Turning
Lead-in and Lift-off for Ramp Rough TurningThese options allow penetration into the workpiece at a reduced feedrate in order to prevent tool damage.
Feeds and Speeds for Ramp Rough Turning
then you can give a Machining Speed value.
Feedrates in units per minute are also
available for air cutting (for example, during macro motions and path
transitions). Dwell setting indicates whether the tool dwell at the end of each path is to be set in seconds or a number of spindle revolutions. Please note that decimal values can be used for the number of revolutions. For example, when machining big parts that have a large volume, it can be useful to specify a dwell using a value of less than one revolution (0.25, for example). Tool Compensation for Ramp Rough TurningYou can select a tool compensation number corresponding to the desired tool output point. Note that the usable compensation numbers are defined on the tool assembly linked to the machining operation. If you do not select a tool compensation number, the output point corresponding to type P9 will be used by default. Approach, Retract and Linking Macros for Ramp Rough TurningThe following Approach and Retract macro modes are proposed: Direct, Axial-radial, Radial-axial, and Build by user. The selected macro type (Approach or Retract) defines the tool motion before or after machining. Various feedrates are available for the approach and retract motions (RAPID, lead-in, lift-off, and so on). Linking macros, which comprise retract and approach motion can also be
used on Ramp Rough Turning operations. See Define Macros on a Turning Operation for more information. |