GDT Section 4 Datum and Datum Reference Frames (DRF)
Test your GD&T knowledge of ASME Y14.5 Datum and DRF
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What You Will Learn!
- Test your knowledge of ASME Y14.5 GDT chapter 4
- DATUM REFERENCING (DRF)
- Establishing datums from datum features
- Application of GDT Principles
Description
GDTP stands for Geometric Dimensioning and Tolerancing Professional. It is a certification program offered by the American Society of Mechanical Engineers (ASME) that verifies an individual's competence in understanding and applying the principles of Geometric Dimensioning and Tolerancing (GD&T). GD&T is an essential language used for clear communication in manufacturing, ensuring that designs are manufactured as intended. ASME's Y14.5 Standard serves as the authoritative guideline for GD&T, and GDTP certification is based on either the 1994 or 2009 revisions of this standard, including its appendices and the application of its principles and practices. The certification program offers two levels of certification: Technologist and Senior. This section is based on Chapter 4 of ASME STD. In this section, topics covered DATUM REFERENCING including
(a) definitions
(1) datum simulator
(2) datum reference frame
(b) immobilization of part
(1) purpose — measurable relationships
(2) true geometric counterparts
(3) application
(4) datum reference frame
(c) datum feature identification
(d) datum feature controls
(e) datum feature order of precedence
(f) establishing datums from datum features
(1) datum features not subject to size variations
(2) datum features subject to size variations
(3) multiple datum features
(4) pattern of features
(5) screw threads, gears, and splines
(6) partial surface as datum features
(7) mathematically defined surface
(8) multiple datum reference frames
(9) simultaneous versus separate requirements
(10) simultaneous requirements and composite
feature control
(g) datum targets
(1) purpose/applications
(2) datum target symbol
(3) datum target points
(4) datum target lines
(5) datum target areas
(6) datum target dimensions
(7) datum planes established by datum targets
(8) methods of establishing a primary datum axis
(9) equalizing datums
(10) datums established from complex or irregular
surfaces
Who Should Attend!
- (a) design engineer (b) production or manufacturing engineer (c) process engineer (d) quality engineer (e) tool or gage engineer (f) engineering manager (g) user or programmer of CAD, CAM, CAE, or other software (h) drafter (i) checker (j) engineering consultant (k) educator (l) inspector (m) contract engineer (n) project engineer (o) technical specialist