|approach macro||Motion defined for approaching the operation start point.|
|APT Import activity||This is an entity created in the Manufacturing Program by importing NC data (APT source, Clfile or NC code). It references a tool path, like a machining operation, but it has no attribute specification. The tool path comprises tool motions and/or Post-Processor words.|
|APT Tool||This is a tool which is created from the CUTTER definition found in the APT source file or Clfile. The CUTTER definition includes 7 parameters which are tool radius, corner radius, horizontal and vertical distances from the center of the corner to the tool axis or bottom, bottom and flank angles, and finally the tool height. This definition is quite poor to define a Version 5 tool. An APT Tool is a resource which cannot be modified and used by Version 5 machining operations.|
|auxiliary command||A control function such as tool change or machine table rotation. These commands may be interpreted by a specific post-processor.|
|axial machining operation||Operation in which machining is done along a single axis and is mainly intended for hole making (drilling, counter boring, and so on).|
|back and forth||Machining in which motion is done alternately in one direction then the other. Compare with one way.|
|bottom plane||A planar geometric element that represents the bottom surface of an area to machine. It is normal to the tool axis.|
|check||A list of Knowledgeware
expressions that are used to constrain the validity of a machining process
or a machining operation.
In a single expression, operators such as and and or are available. In a list of expressions, an and operator is applied between check expressions. When a machining process is applied, the checks list is executed, a logical status is returned, and the operation is created if the status is true.
|clearance macro||Motion that involves retracting to a safety plane, a linear trajectory in that plane and then plunging from that plane.|
|climb milling||Milling in which the
advancing tool rotates down into the material. Chips of cut material tend
to be thrown behind the tool, which results to give good surface finish.
Compare with conventional milling.
|conventional milling||Milling in which the advancing tool rotates up into the material. Chips of cut material tend to be carried around with the tool, which often impairs good surface finish. Compare with climb milling.|
|DPM||Digital Process for Manufacturing.|
|extension type||Defines the end type of a hole as being through hole or blind.|
|Facing operation||A surfacing operation in which material is removed in one cut or several axial cuts of equal depth according to a pre-defined machining strategy. Boundaries of the planar area to be machined are soft.|
|Fault||Types of faults in material removal simulation are gouge, undercut, and tool clash.|
|feedrate||Rate at which a cutter
advances into a work piece.
Measured in linear or angular units (mm/min or mm/rev, for example).
|fixture||Elements used to secure or support the workpiece on a machine.|
|formula||A Knowlegeware expression containing feature attributes that is used to compute parameters (mainly parameters of a machining operation).|
|generic machine||A CATProduct machine representation that was created using the NC Machine Tool Builder product.|
|gouge||Area where the tool has removed too much material from the workpiece.|
|hard||A geometric element (such as a boundary or a bottom face) that the tool cannot pass beyond.|
|inward helical||Machining in which motion starts from a point inside the domain to machine and follows paths parallel to the domain boundary towards the center of the domain. Compare with outward helical.|
|linking motion||Motion that involves retracting to a safety plane, a linear trajectory in that plane and then plunging from that plane.|
|machine rotation||An auxiliary command in the program that corresponds to a rotation of the machine table.|
|machining axis system||
Reference axis system in which coordinates of points of the tool path are given.
A feature instance representing a volume of material to be removed, a machining axis, tolerances, and other technological attributes. These features may be hole type or milling type.
|machining operation||Contains all the necessary information for machining a part of the workpiece using a single tool.|
|machining process||An ordered list of machining
operations, PP instructions and, possibly, machine rotations. It can be used
in two ways:
The maximum allowed difference between the theoretical and computed tool path.
Defines the sequence of part operations necessary for the complete manufacture of a part.
Allows various views of the part operation:
|milling operation||Operation in which 2.5 to 5-axis capabilities are used for part machining (roughing, pocketing, surface machining, contouring, and so on).|
|multi-level operation||Milling operation (such as Pocketing or Profile Contouring) that is done in a series of axial cuts.|
|NC Setup Assembly||The assembly in the process that contains the design part and all other parts (such as fixtures, stock, and In Process Model) that are necessary to perform the process. All the components of the NC Setup Assembly are positioned.|
|offset||Specifies a virtual
displacement of a reference geometric element in an operation (such as the
offset on the bottom plane of a pocket, for example).
An offset value can be greater than, less than, or equal to zero. It is measured normal to the referenced geometry or in a specific direction such as axial or radial.
For example, a 5mm Offset on Contour means that a virtual displacement is applied normal to the contour geometry. A 5mm Axial Part Offset means that a virtual displacement is applied to the part geometry along the tool axis direction.
Compare with thickness.
|one way||Machining in which motion is always done in the same direction. Compare with zig zag or back and forth.|
|outer part||See pocket.|
|outward helical||Machining in which motion starts from a point inside the domain to machine and follows paths parallel to the domain boundary away from the center of the domain. Compare with inward helical.|
Links all the operations necessary for machining a part based on a unique part registration on a machine. The part operation links these operations with the associated fixture and set-up entities.
|An area to be machined
that is defined by an open or closed boundary and a bottom plane. The pocket
definition may also include a top plane and one or more islands.
Distinction between pocket and outer part
Let's consider the case below.
Case 1: the tool cannot go through the opening, so we have two tool paths:
Case 2: the tool can go through the opening, there is only one tool
path limited by both the part and stock. The whole blue area is an outer
In short, a pocket is limited by the part only, an outer part is limited by the stock or by both the stock and part.
|Pocketing operation||A machining operation in which material is removed from a pocket in one cut or several axial cuts of equal depth according to a pre-defined machining strategy.|
|Point to Point operation||A milling operation in which the tool moves in straight line segments between user-defined points.|
|PP instruction||Instructions that control certain functions that are auxiliary to the tool-part relationship. They may be interpreted by a specific post processor.|
|PPR||Process Product Resources.|
|Process Template||A CATProcess that is 'cleaned' from all linked files and all unnecessary information (except machining operations). For example, all links to external tool paths, IPM bodies or CATDrawings associated to the previous design are removed. This allows reusing a CATProcess structure to program the machining of a new design by keeping the sequence of operations and the parameter values that were used in the previous program.|
|Profile Contouring operation||A milling operation in which the tool follows a guide curve and possibly other guide elements while respecting user-defined geometric limitations and machining strategy parameters.|
|retract macro||Motion defined for retracting from the operation end point|
|return macro||Motion for linking between paths or between levels. It involves retracting to a safety plane, a linear trajectory in that plane and then plunging from that plane.|
|safety plane||A plane normal to the tool axis in which the tool tip can move or remain a clearance distance away from the workpiece, fixture or machine.|
|set up||Describes how the part, stock and fixture are positioned on the machine.|
|soft||A geometric element (such as a boundary or a bottom face) that the tool can pass beyond.|
|spindle speed||The angular speed of
the machine spindle.
Measured in linear or angular units (m/min or rev/min, for example).
|stock||Workpiece prior to machining by the operations of a part operation.|
|thickness||Specifies a thickness
of material to be removed by machining. A thickness value must be greater
than zero and is measured normal to the machined geometry. For
example, if a 5mm Finish Thickness is specified on an operation then 5mm of
material will be removed during the finish pass.
Compare with offset.
|top plane||A planar geometric element that represents the top surface of an area to machine. It is always normal to the associated tool's rotational axis.|
|tool axis||Center line of the cutter.|
|tool change||An auxiliary command in the program that corresponds to a change of tool.|
|tool clash||Area where the tool collided with the workpiece during a rapid move.|
|tool path||The path that the center of the tool tip follows during a machining operation.|
|tooling query||One or more Knowledgeware expressions that define criteria to find an appropriate tool for a given machining operation.|
|total depth||The total depth including breakthrough distance that is machined in a hole making operation.|
|undercut||Area where the tool has left material behind on the workpiece.|
|WPC file||This is the file format for data resulting from a material removal session. A typical ascii WPC file contains the number of faces/edges available in the solid and all the vertex information forming each of the triangles in the solid.|
|zig zag||Machining in which motion is done alternately in one direction then the other. Compare with one way.|