CONTENTS
Description Page No.
1. Acknowledgement 4
2. Abstract 5
3. Why this project? 6
4. Introduction to CAD/CAM/CAE 7
4.1. Need for CAD/CAM/CAE 8
4.2. Advantages 8
4.3. Drawbacks 8
5. Introduction to CATIA 9
5.1. Some Common features used in CATIA Design 10
6. Introduction to Stop Valve 14
6.1. Different Part of Stop Valve 14
7 Conclusion 26
List of Figures
Description Page No.
1. Pad feature 10
2. Pocket feature 11
3. Shaft feature 11
4. Rib feature 12
5. Multi Section feature 13
6. Fillet feature 13
7. Stop Valve Body 14
8. Drafted View of Stop Valve Body 15
9. 3D & Drafted views of Spindle 16
10. 3D & Drafted views of Hand wheel 17
11. 3D & Drafted views of Valve Seat 18
12. 3D & Drafted views of Valve 19
13. 3D & Drafted views of Cover 20
14. 3D & Drafted views of Bridge 21
15. 3D & Drafted views of Nut 22
16. Stop Valve Assembled View 23
17. Sectioned view of Stop Valve body 24
1. ACKNOWLEDGEMENT
//////This is the golden and memorable day for me on which I am
presenting my project report
entitled “DESIGN OF STOP VALVE ASSEMBLY USING CATIA”, during
my under
graduate level of engineering studies.
It’s my pleasure and fortune that, I avail this opportunity to place my
profound gratitude to
Er. JITENDER ( Sr Engineer Training & project guide ), whose co-
operation and guide
helped me to traverse a long distance and finally complete this
pr////
2. ABSTRACT
Throughout the life cycle of engineering products, the uses of
computers are prominent and often have a central role. With the
help of Computer Aided Designing, Computer Aided
Manufacturing and the application of various computer software’s
in engineering we analyze the robustness and the performance of
the components, which encompasses simulations,
validations and optimization of products and manufacturing tools.
This assignment clearly demonstrates the significance of CAD and
CAM solutions.
Hence, we joined the CATIA course to enhance our knowledge
about design and
manufacturing.
Being a student of CATIA course, only gaining knowledge about
design software was not enough. So we realized it is also
important to implement our knowledge into a project with our
knowledge, what we have learn in this course and our innovative
ideas. Hence we came up with the idea of designing of a model of
STOP VALVE with the available resources in our work book. This
project on STOP VALVE provided us with an excellent opportunity
to brush our knowledge on designing.
3. WHY THIS PROJECT ?
From the very beginning of my engineering studies my dream is to envisage
myself as a design engineer round the globe. Being a engineering student I
have always keen interested towards drawing and designing various field of
mechanical engineering , my career objectives include performing extensive
research in mechanical engineering as a design engineer being part of an
organization which provide me ample opportunity to do so, while doing
summer training on CADD CENTRE, I feel that without a design project work
my knowledge over CATIA will remain incomplete, so I decided to do this
project work “DESIGN OF STOP VALVE ASSEMBLY USING CATIA”, with direct
supervision in inspiration of my project guide Mr. JITENDER. As well as
possible I try to explore my views and ideas Over the subject. I may not
certain about what new design I have done in this project but , but confirm
that what design I have done is a complete new experience for me and hope
the experience gain by me through this project work will help me to fulfill my
dream . as possible as every effort has been made by me to give a crystal clear
view over the subject on reader’s mind .
4. INTRODUCTION TO CAD/CAM/CAE
The Modern world of design, development, manufacturing so on, in which we
have stepped can’t be imagined with out interference of computer. The usage
of computer is such that, they have become an integral part of these fields. In
the world market now the competition in not only cost factor but also quality,
consistency, availability, packing, stocking, delivery etc. So are the
requirements forcing industries to adopt modern technique rather than local
forcing the industries to adapt better techniques like CAD / CAM / CAE, etc.
The Possible basic way to industries is to have high quality products at low
costs is by using the computer Aided Engineering (CAE), Computer Aided
Design (CAD) And Computer Aided Manufacturing (CAM) set up. Further
many tools is been introduced to simplify & serve the requirement CATIA,
PRO-E, UG are some among many.
This penetration of technique concern has helped the manufacturers to
a) Increase productivity
b) Shortening the lead-time
c) Minimizing the prototyping expenses
d) Improving Quality
e) Designing better products
Here in this Chapter we will be discussing on STOP VALVE.
Section 1: Description of STOP VALVE and Its working principle
Section 2: Modelling of each disassembled parts and assembling
CAD: Computer Aided Designing (Technology to create, Modify, Analyze or
Optimize the design
using computer.
CAE: Computer Aided Engineering (Technology to analyze, Simulate or Study
behavior of the cad model generated using computer.
CAM: Computer Aided Manufacturing (Technology to Plan, manage or control
the operation in manufacturing using computer.
4.1. NEED FOR CAD,CAM &CAE:The usage of CAD CAE & CAM have changed
the over
look of the industries and developed healthy & standard competition , as could
achieve target in lean time and ultimately the product reaches market in
estimated time with better quality and consistency. In general view, it has lead
to fast approach and creative thinking.
4.2 ADVANTAGES:
1. Cut off of the designing time
2. Cut off of the editing time
3. Cut off of the manufacturing time
4. High & controlled quality
5. Reduction of process cost
6. Consistency
4.3 DRAWBACKS:
1. Requires skilled operators
2. Initial setting & assumption consumes time
3. Setting cost is more
4. Over heads are high and
5. Applicable if production is high
5 INTRODUCTION TO CATIA
INTRODUCTION : CATIA is a robust application that enables you to create
rich and complex designs. The goals of the CATIA course are to teach you how
to build parts and assemblies in CATIA, and how to make simple drawings of
those parts and assemblies. This course focuses on the fundamental skills and
concepts that enable you to create a solid foundation for your designs.
WHAT IS CATIA??? CATIA is mechanical design software. It is a feature-
based, parametric solid modelling design tool that takes advantage of the
easy-to-learn Windows graphical user interface. You can create fully
associative 3-D solid models with or without constraints while utilizing
automatic or user-defined relations to capture design intent. To further clarify
this
definition, the italic terms above will be further defined:
FEATURE BASED
Like an assembly is made up of a number of individual parts, a CATIA
document is made up of individual elements. These elements are called
features. When creating a document, you can add features such as pads,
pockets, holes, ribs, fillets, chamfers, and drafts. As the features are created,
they are applied directly to the work piece.
•Sketched-based features are based on a 2D sketch. Generally, the sketch is
transformed into a 3D solid by pad , shaft , rib , multi sections.
•Dress-up features are features that are created directly on the solid model.
Fillets and chamfers are examples of this type of feature.
Parametric
The dimensions and relations used to create a feature are stored in the model.
This enables you to capture design intent, and to easily make changes to the
model through these parameters.
• Driving dimensions are the dimensions used when creating a feature. They
include the dimensions associated with the sketch geometry, as well as those
associated with the feature itself. Consider, for example, a cylindrical pad. The
diameter of the pad is controlled by the diameter of the sketched circle, and
the height of the pad is controlled by the depth to which the circle is extruded.
• Relations include information such as parallelism, tangency, and
concentricity. This type of information is typically communicated on drawings
using feature control symbols. By capturing this information in the sketch,
CATIA enables you to fully capture your design intent up front.
SOLID MODELING: A solid model is the most complete type of geometric
model used in
CAD systems. It contains all the wireframe and surface geometry necessary to
fully describe the edges and faces of the model. In addition to geometric
information, solid models also convey their “topology”, which relates the
geometry together. For example, topology might include identifying which
faces (surfaces) meet at which edges (curves). This intelligence makes adding
features easier.
For example, if a model requires a fillet, you simply select an edge and specify
a radius to create it.
Fully Associative: A CATIA model is fully associative with the drawings and
parts or assemblies that reference it. Changes to the model are automatically
reflected in the associated drawings, parts, and/or assemblies. Likewise,
changes in the context of the drawing or assembly are reflected back in the
model.
Constraints: Geometric constraints (such as parallel, perpendicular,
horizontal, vertical,
concentric, and coincident) establish relationships between features in your
model by fixing their positions with respect to one another. In addition,
equations can be used to establish mathematical relationships between
parameters. By using constraints and equatpions, you can guarantee that
design concepts such as through holes and equal radii are captured and
maintained.
5.1 SOME COMMON FEATURES USED IN CATIA PART DESIGN
PAD: Pad is used to add material to a model.
POCKET: Pocket is a sketch based feature that remove material from a model.
Pocket is also performed on an open profile.
SHAFT: A shaft is revolved sketch based feature that adds material to the
model
RIB: Rib is a positive (i.e. add material) solid that is generated by sweeping a
profile along a centre curve. It need two profiles in two different planes.
MULTI SECTION: Multi sections solid can be positive or negative solid that is
generated by
two or more planar profiles swept along a spline.
FILLET: Fillet is a curved face of a constant or variable radius that is tangent
to , and that joins two surfaces.
