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ENGINEERING DRAWING

ENGINEERING DRAWING. What is Engineering Drawing..? It communicates an idea, design, schematic or model. It comes in many forms- Electrical -Civil - Mechanical. What is the need…..?. That’s why Drawing is the L anguage of Mechanical Engineers….!!. What is Projection…?.

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ENGINEERING DRAWING

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  1. ENGINEERING DRAWING • What is Engineering Drawing..? • It communicates an idea, design, schematic or model. • It comes in many forms- Electrical -Civil -Mechanical

  2. What is the need…..?

  3. That’s why Drawing is the Language of Mechanical Engineers….!!

  4. What is Projection…? ISOMETRIC PROJECTION ORTHOGRAPHIC PROJECTION

  5. METHODS OF PROJECTIONS: • FIRST ANGLE METHOD OF PROJECTION: • THIRD ANGLE METHOD OF PROJECTION:

  6. What about 2nd Angle & 4th Angle Method ……??

  7. How to identify the Method of Projection…?

  8. MACHINE DRAWING • It contains: • Drawing of machine components, machine assemblies and subassemblies. • Conventional representation of different materials, sections and machine components. • Representations of limits, fits & tolerances etc. • Modeling softwares.

  9. ASSEMBLY & DETAILS

  10. ASSEMBLY DRAWING: • Assembly is combination of various links & parts grouped together to perform some function. • It’s the drawing which shows various parts of machine in their working position. • One can find the way & sequence in which these parts are assembled together.

  11. ASSEMBLY DRAWING (contd…) • Assembly drawing should satisfy: • Manufacturing requirements, • Operational requirements, • Maintenance requirements.

  12. ASSEMBLY OF CENTRIFUGAL PUMP WITH MOTOR :

  13. DETAIL DRAWING: • Describes a single part, or several parts individually with all detail specifications. • For manufacturing individual parts we need detailed drawing of each part. • It should furnish complete information & standard conventions. • These are made from the assembly drawings.

  14. DETAIL DRAWING (contd…) • It should carry : • Size & shape description with min. possible no. of orthographic views. • Special sections/auxiliary/pictorial views. • Thorough dimensions. • Material, surface finish grade, No. of parts required, etc.

  15. DETAILS OF SCREW JACK:

  16. Identification • Ballooning: - A part is located and identified, in an assembly drawing, by using a circle containing the part number and a leader line that points to the corresponding part.

  17. Leader lines point to the corresponding part. Balloons containing part numbers.

  18. Balloons are placed in orderly horizontal or vertical rows.

  19. The leader lines; • should not cross, • be as parallel as possible.

  20. Parts List / Bill of Material • The parts list is an itemized list of the parts that make up the assembled machine.

  21. Parts List / Bill of Material • Parts lists contains: • Part number, part name, the number required and the material of the part. • Parts are listed in order of their part. • Parts are usually assigned based on the size or importance of the part.

  22. The parts list may be placed in the upper right corner of the drawing. - Part# 1 is at the top.

  23. The parts list may be placed in the lower right corner of the drawing. - Part# 1 is at the bottom.

  24. NEED OF SOFTWARES : • Increases accuracy & productivity of designer. • Allows design alterations. • Transfer of drawing is faster & cheaper. • Easy to store & retrieve. • Better drawing visualization through colours. • Improves the quality of drawing.

  25. SOFTWARES • AUTO CAD (Computer Aided Drafting) • CATIA • PRO-E • SOLIDWORKS

  26. AUTO CAD:

  27. CATIA:

  28. PRO-E:

  29. SOLIDWORKS:

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