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How to Create an Engineering (Mechanical) Drawing from Scratch?

Gone are the days when a draftsman used pencil, paper, a drafting board, and several other sophisticated drafting tools for making an Engineering Drawing. In this era, almost everything can be accomplished effortlessly by means of CAD Software .  To generate a Drawing in CAD, the only other pre-requisite one needs is a 3D Model created in CAD Software. (Note: If you use different CAD software for 3D Modeling and Drafting, you need to export the CAD Model from one software to import it into another in universal file formats like STEP, IGES, or Parasolid).  Firstly, you need a Drawing Template to work with. A drawing template is something that comes with some user-defined settings with which you want to generate your drawing. Unless you’re starting a new company, the templates would have already been frozen and you may not get a chance to remake them until you revoke the current software. You can find more details on how to make a template here . During the making of the template, some
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All About Gear

To transmit motion between two shafts. or a shaft and a slide. Sliding motion between Gears tooth surfaces. Omega = Angular Velocity (rad/s) Omega1*Radius1 = Omega2*Radius2 Practical limit for Velocity Ratio... for Spur Gears = 6 for Helical Gears = 10 for higher ratios, two or more Gear Pairs are used. Parallel Shafts: Spur Gears - since Line Contact,      -  Sudden application of load,      -  high impact stresses,      -  excessive noise at high speeds. Helical Gears - starts with a point contact and extends along a diagonal line across the teeth - low impact stresses, reduction in noise.  Spur Rack (infinite diameter), Pinion, Gear External Gear, Internal Gear External Pinion, External Gear => One rotates in CW, One rotates in CCW External Pinion, Internal Gear => Both rotate in same direction
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It's Summer Here, How About Designing some Ice Cubes?

  By the way I'm a Mechanical  Design Engineer. And I was pretty poor at designing. And I feel this is pretty easy way to learn to design things.  My Mantra towards designing things is (if you're not a pro), start with pretty basic geometry and build from there. Since you'll be building things only virtually, you shouldn't be wasting any material or energy. So, for the first tutorial let's move on with designing an ice cube. My choice of CAD software for accomplishing this would be Autodesk Fusion 360. Being a simple person and also a math fanatic, I start with simple geometries.. something like below. The next step I will be doing is to taper all the sides with a draft of 15 deg. After the modification the design will be altered as below. Fusion allows us to do this by rotating the side faces about the top edges by means of a  Mystic Wheel .  Note: There is another way to achieve the above design, by Lofting the above and below face sketches. And the reason for not
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Design Speed - How Fast you can Design

Analogy.. How fast you can speak depends on how fast your thoughts are (flow of thoughts) and.. how long have been Fast/Articulated Speaking. How fast you can type depends on Muscle Memory and.. Speed and Dexterity of fingers. Similarly, how fast you can design depends on your ability to manipulate 3d thoughts in your head and.. Familiarity with CAD software interface. First one is mental ability and second one is skill (which comes with practice) The latter can be improved within short time. But the former..
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Limitations in Designing

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Writing vs Designing

Both Writing and Designing are Creative fields.  For (Creative) Writing to happen, one should Read extensively. Have their fair share everyday. Similarly, to create (Great) Designs, one should feed themselves with other Designs. It's not about reproducing the same content. But, mix and matching the intrinsic features to create a completely new creature.
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Under Mech77

Under the present situation and time limits, it seems very much important to know what comes under the purview of Mechanical Design.  There are plenty of resources for Industrial Design. So conceptualization , CAD , Renderings can be covered under Industrial Design . And there is Manufacturing knowledge which is an intersection between Mech and Industrial. So read Industrial material first and then Mech. Sketching need to be mastered!!! to present concepts. And 3D Modelling should be at lightning speeds. Creative Problem Solving comes in when solving real problem.
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