Geometric Dimensioning & Tolerancing
The Language of Engineering
Training professionals to be competent in geometric dimensioning & tolerancing to communicate and collaborate effectively.
Make GD&T Your First Language
The lack of understanding & interpretation of GD&T among engineers are very common in the industries. This had led to non-standardised approaches and collaboration in designing, manufacturing and quality controls in precision parts and assembly realisation.
Ignorance in the engineering language can be the root cause of manufacturing cost implication contributed from design, manufacturing to quality resulting in delivery commitment failure as parts and assemblies failed the quality requirements.
Misinterpretation of GD&T in engineering drawings will lead to errors in critical dimensions and its application can cause catastrophic events.
As engineering organizations with manufacturing operations become more globalised and decentralised the skills and knowledge in GD&T to collaborate and standardised communication specifically on the product design intent to the manufacturing and Quality is more important.
The Fundamentals of GD&T
Engineers need to know. The symbols and the modifying symbols, rules, definitions and conventions that can be sed to describe the size, form, orientation and location tolerances of part features.
GD&T Standardisation From Design Intent To Manufacturing To Quality and Assembly Realization
Design Intent Definitions - Design of mechanical part presented in an engineering drawing shown in figure 1, is described by specification of ASME Y14.5 standard defining the part features geometrical shapes, dimensions and tolerances based on form, fit and function of the assembly based on the design intent.
Manufacturing Requirements - Manufacturing processes produce parts with dimensional variations must be within the design acceptable tolerances limits defined in an engineering drawing (Figure 1) of all considered features to fulfil the design intent.
Quality Inspections - Quality requirements of all considered features in the part in accordance to the GD&T are defined in the engineering drawing. Inspecting the composite dimensional tolerances and modifiers application ensuring functional components at sub-assemblies or final assembly level must be within quality requirements before delivery as a single piece part or low to high volume mass production.
Quality Assurance - Applications & Gauge Design for virtual simulation in quality inspection for parts and assemblies. Example on the use of inspection gauge design (Taylor Principles) verifying the geometrical dimensional and tolerance requirements. Purpose is to quality inspect by simulating the assembly condition virtually, ensuring the dimensions of the components are within the design intent of the assembly functional requirements achieving product and assembly realisation.
