Student's project modelling of internal combustion engines using pro engineer

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Modeling of I.c.engine components with pro/engineer Nirma university (IDS)

1. PROJECT OBJECTIVES

To learn about I.C.Engine and component.

Modeling and assembly of crank shaft, piston, connection rod, connection rod bearing and gudgeon pin.

Importance of this part in I.C.Engine.

To Learn about pro/engineer software.

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2. INTRODUCTION:-

2.1 INTRODUCTION OF I.C. ENGINE

► Internal combustion engines are those engines in which the combustion of fuel takes place inside the engine cylinder.

► Due to the compression of air very high temperature produced and after this spark is generating and it’s produced hot burnt gases and force produced on piston.

► An I. C. Engines have efficiency about 35-40 percent.

► It can be started instantaneously.

► An I. C. Engine does not require a boiler or other components. Thus, it is light and compact.

► The working pressure and temperature inside the cylinder is very high.

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2.2 FUNCTION OF I.C.ENGINE PARTS:-

PISTON:-

It is considered as the heart of an I.C. engine, it’s main function is to transmit the force exerted by the burning of charge to the connecting rod. Pistons are generally made of aluminium alloys which are light in weight.

CONNECTING ROD:-

It is a link between the piston and crankshaft, whose main function is to transmit force from the piston to the crankshaft.

CRANKSHAFT:-

It is considered as the backbone of an I.C. engine whose function is to convert the reciprocating motion of the piston into the rotary motion with the help of connecting rod.

CRANK CASE:-

It is a cast iron case, which holds the cylinder and crankshaft of an I.C. engine. it also serves as a sump for the lubricating oil

CYLINDER:-

It is one of the most important parts of the engine, in which the piston moves to and from in order to develop power. Generally, the engine cylinder has to withstand a high pressure and temperature. Thus the materials for an engine cylinder should be such that it can retain sufficient strength at such a high pressure and temperature.

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2.3 INTRODUCTION OF PRO/ENGINEER SOFTWARE:-

2.3.1 DEFINITION OF PRO/ENGINEERING:-

► Pro/ENGINEER wildfire 3.0 is a powerful program used to create complex designs with great precision.

► Pro/engineer is a very powerful tool.

► You can harness this power to capture the design intent of your models by acquiring and understanding of the fundamental concepts.

► Pro/engineer is a solid modeler it develops model as solids allowing you to work in three dimensional environments.

2.3.2 BASIC DIAGRAM OF FEATURES OF PRO/ENGINEER

SOFTWARE IN PART MODULE:

Pro/engineer

Software

Sweep

Extrude

Revolve

Blind

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2.4 Design process consists of the following steps:-

1. Sketching using the basic sketch entities.

2. Converting the sketch into features and parts.

3. Assembling different parts and analyzing them.

4. Documenting parts and the assembly in terms of drawing views.

5. Manufacturing the final parts and assembly.

2.5 DATUM PLANE :- A datum plane is an infinite, two dimensional, flat references. It does not have

any mass or volume. You use datum planes as a reference in your model where one does

not already exist. In pro/engineer, a datum plane has two sides; a yellow side and a red

side. The system displays a datum plane with a border (red, yellow or both, depending on

the orientation from which the plane in viewed.)And a text name DIM1, DIM2, and

DIM3.

To select a datum plane, you can do any of the following: Pick the datum border. Pick the datum plane text.

WE CAN USE DATUM PLANES FOR THE FOLLOWING PURPOSES:

A sketching plane. As reference planes for sketching. To assembly reference. To dimension references. To create cross-section. As a reference for mirroring features. As a reference for missing features. As orientation reference.

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2.6 SYSTEM REQUIREMENTS FOR Pro/ENGINEER:-

1. Operating system: Windows NT 4.0 sp5, windows 2000, windows XP home edition,

XP professional edition, UNIX.

2. Processor 233 MHz or higher:

3. Memory: 128 MB RAM minimum requirements.

4. Hard disk space:1.12GB.

5. Microsoft approved three button mouse.

6. Microsoft approved three button mouse.

7. Microsoft internet explorer 6.0

8. An Ethernet adapter interface card or network Card.

9. Swap memory: 256MB minimum

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GETTING STARTED WITH PRO/ENGINEER

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2.7 INTRODUCTION OF SOLID MODELING:-

• Pro/engineering wildfire 3.0 allows you to easily 3D solid models, enabling you to visualize parts and assemblies with a realistic appearance. Based on material properties such as density, these models have mass, volume, surface area and other physical properties such as a center of gravity.

• The following are advantages of solid modeling: • If the model changes (such as increasing the number of cooling fins), all of the mass

properties would automatically update. • Solid models also allow you to check tolerances and clearance/interference between

components in an assembly

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3. SOLID MODELING Solid Modeling' is a method used to design parts by combining various 'solid objects' into a single three-dimensional (3D) part design. Originally, solid modelers were based on solid objects being formed by primitive shapes such as a cone, torus, cylinder, sphere, and so on. This evolved into solid objects being created and formed from swept, lofted, rotated, and extruded 2D wireframe or sketch geometry.

Because of their limited use, some solid modelers have abandoned the primitive shapes altogether in favor of predefined library solid objects. 'Stock' library objects provide the designer with a similar shape to begin the design with, eliminating some of the initial tedious design work..

3.1 TECHNIQUES FOR CONTRUCTING SOLID MODELS: CSG AND B-REP

Two solid modeling representational techniques have dominated the 3-D CAD modeling field:

(1) constructive solid geometry

(2) boundary representation.

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(1) constructive solid geometry :

Constructive solid geometry is characterized by defining solids in terms of Boolean combination of solids primitives. To facilitate the construction of solids with the CSG technique, designers use a diagram called a CSG tree.

The CSG tree serves to divide the shape into similar predefined shapes or primitives, thus providing a plan for constructing an object with solid primitives & Boolean operators. This approach is called the divide and conquers strategy, because it attracts complex problems by decomposing them into smaller, simpler problems whose solutions can be combined to obtain a solution for geometric problem.

CSG trees and the divided conquer strategy are particularly useful for modeling complex prismatic shapes.

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(2) Boundary representation

The other popular representational technique describes the faces, edges & verticals of a solid that from the boundaries of solid object. This representational technique is called boundary representational (B-Rep).

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4. MODELING OF DIFERENT PARTS

4.1 PISTON:-

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4.2 CONNECTING ROD BEARING:

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4.3 CONNECTING ROD:-

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4.4 CRANK SHAFT (PART-1):-

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CRANK SHAFT (PART-2):-

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4.5 BOLT:-

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4.6 NUT:-

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4.7 WASHER:-

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5. ASSEMBLY OF DIFFERENT PART:-

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WIREFRAME:-

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6. TOOLBARS:-

1. Datum display toolbar

2. Model display toolbar

3. File toolbar

4. Creating a protrusion

5. View toolbar

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7. GENERAL STEPS FOR EXTRUDE

1. Set the working directory.

2. Start a new object file.

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3. Choose the Extrude Tool button or go to Insert and then Extrude Tool

4. Select the sketching plane by selecting Placement and then Define

5. Draw the sketch, using the sketching tools.

6. Apply constraints and dimensions to the sketch.

7. Modify the Dimensions.

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8. Extrude the sketch to the given distance in the direction pointed by the arrow.

9. After viewing the default view of the model, save the model and close the window.

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7.1 MEANING OF SOME IMPORTANT ICONS

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8. GENERAL STEP FOR REVOLVE

1. Click on revolve tool bar. 2. Go to placement>Define and select the sketching plane. 3. Draw the area to be revolved.

4. Click on after completing sketch. 5. Select the appropriate option for revolution angle or whichever is

required.

6. Click on after completing the feature.

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REFERENCES

1. WEB REFERENCE:-

1. www.pro/engineer.com 2. BOOK REFERENCES:-

1. Thermal engineering By R.S.Khurmi.

2. Pro/engineer wildfire 3.0 for engineers and designer By Sham Tickoo.

http://www.pro/engineer.com

Student's project modelling of internal combustion engines using pro engineer

Engineering

Transcript of Student's project modelling of internal combustion engines using pro engineer