Door Arm Rest Week 8 Challenge
Door Arm Rest
Once the class A surface is received, the designer has to check whether the surface is closed. This can be checked by using the join or boundary option.
Creation of tooling axis
The tooling axis plays an important role in the manufacturing of plastic products. This axis decides in which direction the mould will work while production of the component.
The main focus while deciding on the tooling axis is clearing the component in the molding in the same axis with the minimum use of the side core for producing the component.
For particular components X, Y & Z can be the possible tooling axis.
In this component, the Z direction will be the axis where most of the parts are cleared. Therefore, we choose the Z direction for tooling.
The Center of Gravity is found using the inertia option available in Catia V5. Once the CG is found a line is drawn using the point-direction option. The CG is selected as the point and Z-axis is selected as the direction. This line will be considered a Dummy tooling axis.
Performing Main Draft analysis
Now, a trail Draft analysis is performed to find the main tooling direction. Here trail and error by compass method are used. The compass is placed in the dummy tooling axis and draft analysis is performed. If the component is cleared, then the dummy tooling will be considered as the Main tooling axis.
Creating the tooling axis for the side core
The same method used for creating the main tooling axis is used here. But, inside the core tooling axis, Y-axis is used as direction instead of the Z-axis. The component is cleared at the first trail itself. So, we can directly assume that line is the side core tooling axis.
CREATING CLASS B SURFACE
To make the B surface, the surfaces of class A are extracted and offset to a given thickness (2.5mm). Then, the surfaces are untrimmed individually. After this using the TRIM option, the surfaces are trimmed to get the required shape.
Once we get the desired surface, the edge fillet is applied.
CREATING CLASS C SURFACE
The bounday of Class A surface is extracted and using sweep with draft direction option the main tooling axis is selected and extacted boundary is selected as guide curve. For horizontal surfaces give the angle as 3 deg and for vertical surfaces give the angle as 87 deg. Ensure that the arrow is pointing in the outside direction.
For complex surfaces where the sweep is not working, we can use a Multi-Section surface. Select the two end surfaces as sections and the boundary of the surface to be created as a guide curve. Make sure that the two arrows are in the same direction, if not change the direction.
Make sure that there is no gap between the surfaces. If found any gaps, extrapolate the surfaces and trim the extra surfaces.
MAKING THE SURFACE INTO SOLID
Once the B surface and C surface are created, the Class A surface is trimmed with the Class C surface. The output obtained is again trimmed with a Class B surface to get the required surface.
Hence, the final required surface is created. Now, we can make this surface into a solid part. Change the workbench into the Part design and use the closed surface option to make the final output a solid part.
CREATING PUBLICATION
After the creation of the tooling axis, we can insert the publication from the insert tool, the publication saves your time while working on class A for the draft analysis as well as thickening of the component you can directly select your tooling axis and required class surfaces and when required during working on the class A surface.
DRAFT ANALYSIS USING THE MAIN TOOLING AXIS
The draft analysis is an important tool as it helps the user to analyze the draft on various surfaces, the draft analyzer in CATIA uses the color codes for the identification of the draft. Each color has its own meaning for the minimum draft negative draft and under draft.
The draft analysis toolbar provides two modes for analysis of the draft, first is the quick analysis which basically has three colors for analyzing GREEN BLUE, AND RED on the other hand other option is the full analysis mode which enables few more detailing into the draft and is used in the complex components like the instrument panel, etc. In this challenge, we will use the quick analysis mode for analyzing the draft here. Now, bring the compass and align it with the tooling axis and click the lock button in the dialog box and select the part.
Most of the surfaces are cleared using the main tooling axis except the side surface. That can be cleared using the side core tooling axis.
DRAFT ANALYSIS USING SIDE CORE TOOLING AXIS
The same procedure, followed in the Main tooling will be followed here. But in this case, the tooling axis will be the side core tooling axis.
Door Arm Rest Views
Tree Images
FILE REVIEWED BY NIRMAL