Tutorials

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Cross & Dot Product Validated in 3D CAD

Kelly Harward
in Theory
39 12 Beginner
Steps in Validating M = r X F and Maxis = U ●{​r X F}​ using 3D CAD (SolidWorks) Using problem 3-43 and 3-44 from Hibbeler Statics & Mechanics of Materials 5th Edition.
statics mechanics vector moments dot product cross

Gear Basics Part 2

lawrie
in Theory
29 2 Beginner
We will start off this second gear design tutorial by looking at a few design factors we need to consider when designing a serviceable gear train.

Mechanics Basics Part 1

lawrie
in Theory
23 2 Beginner
This tutorial is a look at some of the basic terms and what they represent in a basic mechanics context. Most of the basic mechanics, the starting point for good mechanical design grew out of the work of Sir Isaac Newton. Newton’s work introduced the fundamental terms and principles of mechanical design by application of the physical laws of the universe. From regularly looking at some of the questions posted here on GrabCad, even taking into consideration that for many here, English is not their main language exactly what the person asking a particular question actually wants to know, is sometimes quite hard to deduce. Some things should be universal in most languages especially when working with the ISO standard S. I. Units. As tutorials of this sort benefit from having a downloadable pdf version accompanying this online version, on Grabcad, and as the concept of providing a downloadable pdf version has not entered into GrabCad's concept of a useful feature for tutorials, I will also provide a pdf version for those that may want one. My tutorial Gear Basics Part 1 was entirely in pdf format with just a link to where you could get it from. The Grabcad management were not happy with this so they removed it. If anyone wants the pdf version just mesage me through Grabcad mail, leaving an email address to sent it to.

Designing a Hirth Spline

Tjerk de Graaff
in Theory
24 8 Beginner
Solidworks + Excel instruction on how to design a Hirth Spline. Background on Hirth Splines: https://en.wikipedia.org/wiki/Hirth_joint The basic idea of a Hirth spline / Hirth Joint is that the whole geometry is defined from a combination of a single reference point and a grinding/cutting geometry. Two Hirth splines with the same basic tooth geometry will match to form a secure joint that can transfer torque and allows for accurate alignment of parts. Hirth splines and joints are often used in turbomachinery to accurately align various shaft parts and transfer torque.
design excel solidworks transfer torque joint spine hirth

Fundamentals of the theory of industrial dust protection with bag filters

ALance
in Theory
24 0 Beginner
The oldest cleaning method for bag filters (still used in mobile filters these days) consists of motorised or manual jolting equipment. With automatic regeneration, a motor is started, either at certain intervals or when reaching a maximum filter resistance. This oscillates the filter element. During the resulting movement, the deposited dust cake detaches from the filter surface and drops down into a dust collector, which is usually cleaned via dust dischargers. Mechanical cleaning is performed after interruption of the filtration. The filter bags are stressed mechanically through shaking during the cleaning operation and therefore have relatively short service lives. The periodic reversal of the flow direction (backwashing filter) is a much gentler cleaning method. Here, the filter system features several separate chambers which are cleaned individually. A combination of both cleaning methods was also often realised. For the last decades, however, the jet pulse method has become the standard cleaning method. The filter media are regenerated through cyclic, intense blasts of compressed air. This briefly causes overpressure in the filter bag during cleaning. The filter bags are briefly inflated, the flow direction is reversed and the filter cake detached (fig. 1). A supporting cage gives the bag the required stability during the filtration phase. Among other things, the cleaning cycles depend on the filter load (volume flow per filter surface and unit of time), the gas density, the raw gas charge and the particle attributes. The regeneration can be controlled in time intervals or via defined differential filter pressures.
industrial dust filter bag

Involute profile in splines (1)

Carlos Soler
in Theory
23 0 Beginner
This is a short description of how involute profiles are used in splines like DIN 5480, DIN 5482, ISO 4256, and ANSI 92.1
4156 iso 5482 5480 din serration spline involute

Creativity in Engineering - Part 4 "CPDC results"

Marcelo Valderrey
in Theory
21 2 Beginner
Provisional publication of CPDC results whose deadline is Wednesday, April 24 at 11:59 p.m. A list of students and their models uploaded to GrabCAD is presented and will continue to be updated until the aforementioned deadline.
creativity generation and evaluation of ideas problem resolution

Area Moment of Inertia: Manual Calculation vs CAD

Kelly Harward
in Theory
8 9 Beginner
Area Moment of Inertia: Manual Calculations Validated in CAD (SolidWorks)

Mechanics Basics Part 2

lawrie
in Theory
8 3 Beginner
In this tutorial we will look at the concept of STRESS in an engineering concept. Stress is the mechanics relationship that defines the load we place on a part, and the ability of the material it is made from, to resist this load that has been applied to it. The actual strength of a material is a physical property of the material and as the mechanical parts that we design come in all shapes and sizes, we require value, that relates our load back to the physical properties of the material we want to make our part from As usual, due to the format of the GrabCad tutorial module the pdf version of this tutorial can't be easily attached to this tutorial. The pdf version can be downloaded from this token model I have placed on GrabCad, Mechanics Basics Part 2.pdf can be downloaded here : https://grabcad.com/library/basic-mechanics-tutorial-holding-model-1 Follow this link to download pdf versions of basic mechanics tutorials

Conceptual Design of Dovetail Joint

Marcelo Valderrey
in Theory
8 4 Beginner
Some solutions to the challenge posed by https://grabcad.com/steen.winther are presented: impossible dovetail joint? Each one starts their attempt from a particular situation, which can lead them to first find a solution (such as the rectilinear one) and later others (such as the circular ones). What this tutorial intends is to show the style of conceptual thinking that allows "discovering the rules behind particular cases" to conclude that all possible solutions actually derive from "the same idea". Note: this type of challenge is useful for those who do not know the solution or other similar cases. The idea is to force the process of generating and evaluating ideas. Once you know the case, the opportunity to discover solutions is lost!
resolucion de problemas generacion y evaluacion de ideas creatividad

Involute profile in splines (2)

Carlos Soler
in Theory
7 5 Beginner
This is a continuation of the previous tutorial https://grabcad.com/tutorials/involute-profile-in-splines-1
involute spline serration din 5480 5482 iso 4156

Involute profile in splines (3)

Carlos Soler
in Theory
7 0 Beginner
This is a continuation of the previous tutorial Involute profile in splines (2) https://grabcad.com/tutorials/involute-profile-in-splines-2
ansi b921 ansi seration involute spline

Draw a bended metal

Daniel Staikov
in Theory
5 0 Beginner
Bending a metal sheet
metal sheet bending

Sheet Metal Bend Allowance

lawrie
in Theory
5 0 Beginner
This tutorial is a look at how bend allowances are calculated for sheet metal parts. We will only look at bend allowances as they apply to the type of sheet metal parts that we produce using the common sheet metal tools. Calculating bend allowances for this type of part is a simple process. Calculating the blank size for parts that are produced by stamping flat blanks in complex dies is a much more complex process that is outside of the scope of this tutorial. I have produced a PDF version of this tutorial. If you want a copy of this PDF version you can send me a GrabCad message with an email address to send it to

Draw Third Angle Orthographic Projection

Muhammad Yunus
in Theory
5 0 Beginner
Shows how to make a third angle orthographic projection from isometric projection.
Other isometric angle third projection orthographic
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