Express Tools of GstarCAD 2012 Extended Version

GstarCAD2012 Extended provides an Arrange Tool to solve the arrangement problems perfectly.
Beijing, China, March 04, 2013 --(PR.com)-- In the CAD design, designers always need to arrange the locations of objects. Occasionally, they have to locate the objects manually. Although it is an easy way, when designers need to arrange huge amount objects, it will be complicated and easy lead to errors. For this purpose, GstarCAD2012 Extended provides an Arrange Tool to solve the arrangement problems perfectly.

This tool can arrange multiple objects according to specific row spacing or/and column spacing. There are many patterns of arrangement; they not only can choose a set of arrangement references, but also can easily specify the region of the arrangement. Besides, it is much convenient for users to preview the result of the arrangement in real-time. By this tool, many kinds of arrangement will be realized according to different arrangement references and regions.

First, users have to select Arrange Tool in the tool bar of Edit; the dialog box of Arrange Tool will pop up.

The Arrange Tool has 3 functional areas: Horizontal, Vertical and Region. The usage of these functions is as below:

1. Horizontal

This tool provides 4 options for users, they are: Left horizontal arrangement, Middle horizontal arrangement, Nearest side horizontal arrangement and Right horizontal arrangement.

This arranges the selected objects horizontally, taking the leftmost object as arrangement reference. This option can be combined with others such as region and vertical options to get different arrangement effects. Also you can specify spacing between objects inputting a desire value to place the objects at exact locations.

Middle horizontal arrangement: This arranges the selected objects horizontally in two ways (top or bottom left object).

If there are three objects enclosed by a boundary, select first: specify spacing option and then select: middle horizontal arrangement. Then the selected objects will be moved horizontally according to the middle of the leftmost object as reference.

2. Vertical

The difference between Horizontal and Vertical is the different directions. The Horizontal arranges the objects along the X; the Vertical arranges the objects along the Y.

3. Region

(1) Specify Spacing

Also when you combine these two options, you can specify spacing between objects inputting a desire value. First select specify spacing option, then check nearest side horizontal arrangement option and input a value non-zero besides column and you will see how the objects will be spaced.

(2) Specify Region

This option can be combined with any horizontal and vertical options by specifying the start and end points of the new region. After this, the objects selected will be arranged according to the new region.

(3) Specify Boundary

After selecting objects, the arrange tool dialog box pop up, this option is selected by default, so just we need to select any horizontal or vertical arrangement option. And the objects selected will be arranged horizontally or vertically and equidistant each other according to the boundary.

Download GstarCAD2012 Extended Version at: http://www.gstarcad.net/cad_143_96.html

 

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Application of CAD/CAM technology in Diecasting

1. Scanning of product to be die cast
Reverse engineering is one of the important methods to register the shape of a
product by scanning in die casting field. Hybrid products can be easily created out of
many products by scanning, modeling and super-imposing on each other. Features
can be selected from one part and can be married together to get hybrid product.
Model can also be created out of damaged part by scanning, surfacing and modeling.
This is the cheapest and fastest method of product development.
2. CAD/CAM (Computer added design and manufacturing)
CAD/CAM methodology means associated 3D modeling system to handle all the tool
design, manufacturing and analysis related activities with ease of use.
3. CAPP (computer added process planning)
In case of dies, 3D model of core, cavity and other die parts are further processed for
step-to-step working. All the features are divided in various steps to make easy
working for the operator on CNC/ conventional machines. Operators need not to
bother for many operations and their sequences. He has to perform only the operation
no. allotted to him. This way the inspection at each stage is easier, also operator will
not have a feeling of complicated machining. Complicated machining can be easily
achieved by using CNC and conventional machines, so CAPP is an important aspect
from cost, quality and time point of view of a die.
4. CAI (computer added inspection)
Computer added inspection (CAI) could be done with the help of scanned point cloud
data. It can be used for Comparison between CAD model and scanned model of the
product, produced by a die, can be done by superimposing to illustrate the warpage,
shrinkage and dimensional behavior. This method can be used for inspection and data
storage for large dies where manual work can also be registered as CAD data for
future.
5. 2D drawing To 3D modeling
Normally 2D drawings are being provided by customers, so 3D model can be made
with the help of 2D drawing supplied by the customer. Some time it is felt that few
dimensions are not correct, in that case modeling can be continued with assumed
dimensions. Model can be changes at any time after confirming the assumed
dimensions. This is an important aspect of concurrent engineering. In fact in
CAD/CAM creation of 3D model is only time consuming rest of the activities are just
pressing the button technology.
6. 3D model to 2D drawing
For normal shop floor working 2D drawing plays an important role. Creation of 2D
drawing out of 3D model is very easy with any no. of sections required to clarify the
details of the product. Software is capable enough to give any desired dimensions with
linear and geometrical tolerances.
7. Black-box designing (conceptual base designing)
CAD/CAM technology is very important tool for creating the new shape and design of
the product. Aesthetics of the product can be visualised from all aspects, which saves
lot of development time of a product. Earlier, finalisation of new shape was very
laborious job. Wooden patterns were being manufactured by pattern maker, which
takes lot of time. Latest black-box designing (styling) method is described as below:
Free hand sketching  Rendering  selection of styling part 
 make 3D model of selected style 
 (a) Make rapid prototype sample or
(b) CNC machining of wooden /acrylic prototype
8. Analysis & Simulation (stress, Strain, thermal analysis etc.)
Simulation is a computational algorithm, which has been developed to reduce the time
involved for the designing. Finite element analysis has been carried out for calculation
of different working conditions to optimise the material and design at the initial stage.
9. Analysis of Gate, runner, ejector pins and cooling line etc.
9a. Benefits of diecasting analysis:
 Shorter Design Lead time
 Reduced die trials
 Automatic Gating Feature creation
 Optimises runner and gate weight, resulting in improved yield
 Automatic Runner and Overflows creation
 Reduction in rejection rates due to better filling of casting
 Automatic calculation, systematic editing & built- in intelligence
 Shorter lead times - Die development
9b. DIECASTING PART WITH GATE AND RUNNER
10. NC data generation
CNC milling of core, cavity and other die parts to the final size can be done with help
of carbide cutters available in various shapes and sizes. Some time CNC machining is
required to be done on assembly of core / cavity, sliders, core inserts etc. to get better
matching. CAD/CAM software can Generate associated machining data for any CNC
machine. NC data should be made for core and cavities block of H13 / H11 material as
per following setup:
Roughing program - keeping 0.5 ~1.0 millimeter material
Semi finish program – keeping 0.2 ~0.3 millimeter material
Local area program (semi finish) - keeping 0.2 ~0.3 millimeter material
Finishing program - keeping 0.02 ~0.05 millimeter material for polishing if required
We must take care of sharp corners and keep provision for electrodes. Electrode can
be used in a single stage or multi stage as per requirement.
Die components with regular shapes can be made by conventional method, up to final
shape and size and can be fitted directly to the die.
11. Rapid prototyping
Rapid prototyping is a very strong tool in product development. CAD model can be
directly transferred in to a physical model in plastic, paper and copper etc.. this
physical model can be used as a part of the mechanism and various tests can be
performed to check the efficiency of the mechanism. In case some changes are
required to be done, CAD model is modified and cycle is repeated till the desired
efficiency is achieved. This is the cheapest method for any new development.
12. Concurrent engineering
CAD/CAM/CAE/CAI/CAPP and many other activities can go simultaneously after
preparation of 3D model. This saves lot of time in various activities.
References
1. DIECASTING PRODUCT DESIGN, DIE CASTING EDUCATIONAL PROGRAMME, THE
DIECASTING SOCIETY OF INDIA, NEW DELHI.
2. S.Sekar, system manager, graphics information systems, advanced technologies for design and
manufacture – by psg collage of technology, Coimbatore.
3. NEW TECHNOLOGY for die casting zinc;INTERNATIONAL LEAD ZINC RESEARCH
ORGANIZATION INC. NEW YORK, USA. DISTRIBUTED BY THE DIE CASTING SOCIETY OF
INDIA.
4. Jharna Majumdar, scientist, centre for artificial intelligence and robotics, banglore, advanced
technologies for design and manufacture – by psg collage of technology, coimbatore.
5. Forging and Casting, 8th edition, vol.5, American Society for Metals.
6. UMESH R KULKARNI, DIE DRESSING FOR GRAVITY & PRESSRE DIE CASTING,
REFRESHER COURSE ON PRESSURE DIE CASTING DIES, ORGANIZED BY THE DIE
CASTING SOCIETY OF INDIA.

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