PPT-Dimensioning

Dimensioning The important information on a drawing is the dimension and tolerance of all of its features Lines used in dimensioning Dimension line A dimension line is a thin dark line terminated by arrowheads and indicates the extent of the dimension figure a. 1 All dimension extension and leader lines shou ld be thin sharp dark lines 5mm2H 2 Extension lines indicate the points between which the dimension figures apply They are drawn perpendicular to the dimension lines start with a visibl e gap 132 betw Two general types of dimensions are used in drawings size di mensions such as the size of holes and size of features such as widths and thickness and location dimensions such as the location of holes The purpose of a drawing is to convey to the work EXAMPLE MINIMUM HOLE SIZE AND MAXIMUM SHAFT SIZE LMC LEAST MATERIAL CONDITION THAT CONDITION WHERE A FEATURE OF SIZE CONTAINS THE LEAST AMOUNT OF MATERIAL WITHIN THE STATED LIMITS OF SIZE EXAMPLE MAXIMUM HOLE SIZE AND MINIMUM SHAFT SIZE RFS REGAR 4 WHQVLRQ57347OLQHV57347DQG57347GLPHQVLRQ57347OLQHV 573607KH UVW57347GLPHQVLRQ57347OLQH57347LV57347VSDFHG57347D57347PLQLPXP57347RI573475736657362573715752457347RU57347573645736357347PP57347IURP57347WKH57347YLHZ57347DQG573475736457362573675752457347R Dimensions. What is dimensioning?. Communicating shape and size in a clear fashion. #1 Rule for Dimensioning: Provide the dimensions which most clearly and accurately show the size and location of a feature. . Unit 1 – Introduction, Symbols, and Terms. 2. Everyone should have a workbook to follow along. . It contains necessary reference information along with class exercises.. Page numbers in yellow on the slides match pages in the workbook.. Temperature control allows for approximately 0.1nm/ 1. Dimensions should NOT be duplicated, nor should the same information be given in two different ways.. Incorrect. 1. Dimensions should NOT be duplicated, nor should the same information be given in two different ways.. 1. Dimensions should NOT be duplicated, nor should the same information be given in two different ways.. Incorrect. 1. Dimensions should NOT be duplicated, nor should the same information be given in two different ways.. © 2012 Project Lead The Way, Inc.. Introduction to Engineering Design. Dimensioning Standards. In order for the drawings to be dimensioned so that all people can understand them, we need to follow standards that every company in the world must follow. Standards are created by these organizations. Making things fit. General rules of dimensioning (1). Dimensions . should NOT be duplicated, or the same information be given in two different . ways.. No . unnecessary dimensions should be used - only those needed to produce or inspect the . Unit 1 – Introduction, Symbols, and Terms. 2. Everyone should have a workbook to follow along. . It contains necessary reference information along with class exercises.. Page numbers in yellow on the slides match pages in the workbook.. Will Durfee & Tim . Kowalewski. Department of Mechanical Engineering. University of Minnesota. Opening comments. Engineering graphics is the method for documenting a . design. Mechanical engineering students must be familiar with standards of engineering graphics as it is expected in industry. Unit 2 – Limits of Size. Overview of Rules. There are four general rules. Taylor’s rule. Limits of size. . Regardless of Feature Size (RFS) is the default.. Pitch cylinder axis is reference for thread and screws..