Integrated Machine Tool Simulation & Verification Workshop Machine Tool Resources April 9-10, 2002 Cypress, California

Machine Tool Builder (MTB)  MTB is a new UG application  Creation of the Kinematics Model  Based on the Assembly Model  Definition of the Kinematics Components in a tree structure  Definition of Machine NC Axes, linear and rotary  Definition of Junctions for tool, device change and for NC axis definition  All kinematics components, axes and junctions can be accessed by the machine tool driver.

Machine Tool Model  The Assembly Model is created with the standard UG Modeling and Assembly applications.  The Kinematics Model is created with the new Machine Tool Builder application.  The Machine Model is represented by a UG partfile. Kinematics Model Machine Tool Model Assembly Model

 Machine Tool Model – A tree structure of K- Components that define the machine tool geometric and kinematics models.  K-Component – A group of 0 or more assembly components that has kinematics or machining significance.  Junction – A classified coordinate system used for mounting, NC axis definition and reference from MTD driver.  NC Axis - The linear or rotational degree of freedom defined i.r.t one of the predefine junctions. Objects in Machine Tool Model

Setting Up Machine Tool Resources  Build machine tool model  Add new machine tool to library.  Define cutting tools assembly (optional)  Add cutting tools to library (optional)  Add User Defined Events if required.  Define machine tool driver.

Build Machine Tool Model – Step by Step  Prepare an assembly model of the machine tool. Define controlled geometry objects as assembly components.  Create new part and add machine tool assembly to it.  Create machine base component as a root of a K-Components tree. Classify K-Components if needed.  Define Machine Zero junction (MTCS).  Define junctions for mounting, NC axis and MTD references.  Define NC axes.  Define empty Workpiece component(s) and classify as such.

Library Managed Machine Model  The machine model partfile is managed by the external machine tool library (ASCII, GENIUS, IMAN).  The actual partfile name must be identical to.prt.  For ASCII and GENIUS the environment variable UGII_CAM_LIBRARY_MACHINE_GRAPHICS_PATH points to the location of the machine model partfile.  The default setting for ASCII is $UGII_BASE_DIR\mach\resource\library\machine\graphics  A subdirectory under...\graphics must exist for every machine and contain the machine model and all the component partfiles

Library Managed Cutting Tools  Cutting tools can be managed in external library  A partfile with the geometric model of the tool can be added to the file management of the tool library.  The actual partfile name must be identical to  For ASCII and GENIUS the environment variable UGII_CAM_LIBRARY_TOOL_GRAPHICS_PATH points to the location of the tool partfile.  The default setting for ASCII is $UGII_BASE_DIR\mach\resource\library\tool\graphics

Tool Mounting and Tool Tip Information  By default the tool mounting junction is identical to the absolute CSYS of the tool assembly part  Use part attributes to specify adapter axis and noraml axis to define a mounting junction ADAPTER_AXIS=(1,0,0) NORMAL_AXIS=(0,0,1)  Use part attributes to specify gage offsets CAM_TOOL_ATT_X(1)=-60 CAM_TOOL_ATT_Y(1)=-80 CAM_TOOL_ATT_Z(1)=0

Tool Mounting (cont.)  During simulation the system automatically creates a Tool Tip Junction and a Mounting Junction based on Part attributes.  Name of the junctions is SIM_TOOL_TIP, SIM_TOOL_MOUNT  The user can also create those junctions in the tool partfile by means of MTB. Then part attributes will not be evaluated.  The X-Axis of the tool tip junction defines the rotation axis for milling/drilling tools.