Create Parting Sheets
The following types of parting sheets can be created:
Planar
Natural
Step
Ramp
Before you create parting sheets, perform the parting sheet setup to define the parameters for the parting sheet.
Parting Sheet Setup
Creating parting sheets requires some setup to define the product body, draw direction, and parting sheet boundary.
Perform the following steps for parting sheet setup:
Pick the Casting Process Assistant icon from the Mold Wizard toolbar.
Pick the Casting Body icon from the Casting Process Assistant toolbar. The Casting Body dialog is displayed, and you're prompted to select the product body or specify the draw direction.
The Casting Body dialog has two selection steps: select body and draw direction.
Select body. This is the body selection step. If there is only one body, it will be selected by default.
Draw direction. The draw direction is set to the +Z direction by default. Pick the Draw direction icon in the selection step to display the Vector Constructor dialog and set alternate draw directions.
You define the boundary of the planar parting surface in the Clearance section of the Casting Body dialog. Enter the values for each vector to specify the distance from the part to the planar parting sheet. This defines the planar parting sheet boundary.
Click OK. A rectangle representing the boundary is displayed.
The following figure shows the model before the parting sheet setup procedure.
The following figure shows the boundary rectangle produced by the parting sheet setup procedure.
Creating a Planar Parting Sheet
To create planar parting sheets:
Pick the Casting Process Assistant icon from the Mold Wizard toolbar.
Pick the Planar Parting Sheet icon from the Casting Process Assistant toolbar. The Datum Plane dialog is displayed, and you're prompted to select the object to create the datum plane.
This function creates a datum plane at the level that you want to create a planar parting sheet. A planar parting sheet is created that fits the boundary defined in the Parting Sheet Setup procedure (above).
The following figure shows the planar parting sheet fit to the boundary rectangle.
Create Natural Parting Sheet
The Natural Parting Sheet function helps create extruded, swept, and bounded plane parting surfaces. Any surface you create with the Natural Parting Sheet function is trimmed to the boundary as defined by the Parting Sheet Setup process (above).
The Natural Parting Sheet modeling process is very similar to the standard parting sheet process used in the Mold Wizard parting functions. The main difference is that the natural parting surfaces can be created at any time.
Natural parting sheets use curves or edges as the foundation geometry. Crossover faces must be split to create an edge foundation for the parting sheet.
The following figure shows an extruded natural parting sheet fit to the boundary rectangle produced by the planar Parting Sheet Setup procedure (above).
To create an extruded natural parting sheet:
The boundary is defined in the Parting Sheet Setup procedure (above).
Pick the Casting Process Assistant icon from the Mold Wizard toolbar.
Pick the Natural Parting Sheet icon from the Casting Process Assistant toolbar. The Start Traverse dialog is displayed and you're prompted to select a start edge/curve. In the example above, the Traverse by Face Color option is checked.
Select a parting line edge on the product model that will be the foundation of an extruded parting surface. The Curve/Edge selection dialog is displayed. If a single edge is used (as in this example), the Exit Loop button must be clicked to complete the selection of a single edge. The Natural Parting Sheet dialog is displayed.
Set the Parting Sheet Option type to Extruded.
Pick the First Direction icon. The Vector Constructor dialog is displayed to let you define the extrude direction (in this example, the +X direction). Complete the surface creation by clicking the Create Surface or OK button.
Swept and bounded plane parting sheets are created by a similar process. For swept sheets:
The section is defined by the parting edge selection.
The first and second direction vector options define the guides.
Create Step Parting Sheet
The Step Parting Sheet function helps model parting sheets where isolated areas are at a different level than the primary parting surface.
The Step Parting Sheet function requires the following input:
A planar parting sheet that defines the primary parting level
A datum plane that defines a second parting level
The following figure shows the primary and secondary parting levels.
To create a step parting sheet:
Pick the Casting Process Assistant icon from the Mold Wizard toolbar.
Pick the Step Parting Sheet icon from the Casting Process Assistant toolbar. The Step Parting Sheet dialog is displayed.
Click the Target Faces selection step and select the faces to be closed off by the stepped parting surface.
Click the Step Level selection step and select the datum plane at the stepped parting level.
Click the Main Parting Sheet selection step and select the primary parting sheet.
Enter the dimensional parameters in the Tool Land, Draft Angle, and Radius fields.
Set the Corner radius type to Constant or Conical.
Click Apply or OK.
The following figure shows the addition to the model using a step parting sheet.
Create Ramp Parting Sheet
The Ramp Parting Sheet function helps model parting sheets where there are at least two different parting levels.
The Ramp Parting Sheet function requires the following input:
A planar parting sheet that defines the primary parting level
A planar parting sheet that defines the second parting level
The ramp can be defined by either a boundary curve or a datum plane
The following figure shows the parting levels and datum plane.
To create a step parting sheet:
Pick the Casting Process Assistant icon from the Mold Wizard toolbar.
Pick the Ramp Parting Sheet icon from the Casting Process Assistant toolbar. The Ramp Parting Sheet dialog is displayed.
Click the First Sheet selection step and select one of the parting surfaces.
Click the Second Sheet selection step and select the other parting surface.
Click the Boundary curves or edges selection step and select the datum plane at the ramp position. Alternatively, you can use a curve to define the boundary.
Click Apply or OK.
The following figure shows the ramped parting sheet. |
发表于 2004-7-20 19:11:11
发表于 2004-7-23 08:15:48
