TOPIC 3: FOOD PACKAGING TECHNIQUES

MODULE 1: DIMENSIONS AND TOLERANCES TOPIC 1.1: CLASSIFICATION OF DIMENSIONS, IS SPECIFIED TOLERANCES.

LEARNING OUTCOME OF THE TOPIC. Understanding of Dimensioning Importance of Tolerance Types and Role of Dimensions Features in Engineering Drawings Role of Tolerances in Engineering Drawings Introduction to IS Tolerances and ISO System Illustration and Explanation of Examples Tolerance Grades and Number Symbols.

Definition of Dimensioning: Dimensioning is the process of defining and specifying the size, shape, and geometric characteristics of engineering components on a drawing. Importance of Tolerance: Tolerance is the permissible limit or limits of variation in a physical dimension, a measured value, or a material property. Dimensioning Overview: The language of technical drawings, where dimensions convey size, shape, and positional information. Purpose: To guide the manufacturing process and ensure the produced part matches the designer's intent. Elements: Includes numerical values, units, and symbols indicating the size, location, and orientation of features..

Tolerance in Engineering Drawings: Tolerance specifies the allowable deviation from the nominal or desired dimension. Objective: To ensure functionality, interchangeability, and ease of assembly. Types: Geometric tolerances, Bilateral tolerances, Unilateral tolerances, etc. Importance in Engineering Drawings: Engineering drawings act as a bridge between design and manufacturing teams. Proper dimensioning and tolerance communicate design intent clearly, reducing errors and misinterpretations. Precision and Accuracy: Critical for precise and accurate manufacturing, enabling reproducibility within specified tolerances. Interchangeability: Tolerance enables seamless integration of interchangeable components from different manufacturers in assemblies..