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After attending this course, participants will be able to . .
.
· Choose
the most appropriate three-dimensional geometric characteristic symbology for
sheet metal and other flexible products based on part functionality, ease of
manufacture and inspectability.
·
Choose and apply the most
appropriate datums to stabilize sheet metal and other flexible parts both for
in-process manufacture and final part function.
·
Determine the most effective blend
of geometric symbology and plus and minus tolerancing and still be in compliance
with the ASME Y14.5M-1994 standard.
·
Determine the full effects of the
use of the MMC, LMC and RFS material condition concepts and their impact on
function, manufacturing, inspection and cost.
·
Use Concurrent Engineering
methodology to apply geometrics to improve quality, interdepartmental
communication and cooperation, manufacturability and product assembly.
·
Apply the problem-solving
techniques specifically applicable to flexible parts and parts prone to
free
state
variation.
·
Know the relationship between datum
usage, MMC, RFS and LMC on part fixturing, assembly and gaging.
| Who Should Attend?
This course is directed to anyone
who works with engineering drawings in the sheet metal and other flexible
parts industries. Prerequisite:
attendees should have a basic working knowledge of ASME Y14.5M-1994 and
be able to accurately interpret fundamental principles and concepts of
Geometric Dimensioning and Tolerancing.
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What Will This Course Cover?
Course participants will be trained
on how to apply geometric tolerancing (per ASME Y14.5) to sheet metal and
plastic molded parts and prints. In
addition to reviewing basic Geometric Dimensioning and Tolerancing concepts and
principles, the course will focus on the application and interpretation of
geometric tolerancing applied to sheet metal and plastic molded parts.
Different and unique problems in tolerancing, designing, manufacturing
and inspecting these types of parts will be addressed.
The use of a sample drawing package (of your product
drawings) is a key element of this course as a guide to the tailoring of
information covered. We
wish to optimize time spent in this course; therefore, a packet of engineering
drawings representative of your products’ geometric shapes is requested
prior to the workshop—for the instructor to study/incorporate into his lesson
plan. Additionally, any sample parts
and mating parts brought to the classroom would be extremely effective for
training.
Course Length:
For
an on-site program tailored to your specific needs that will include your
engineering drawings, we recommend a course length of 4 days.
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General
Course Outline by James D. Meadows for:
Geometric
Tolerancing for Sheet Metal and/or
Flexible
Parts [per
ASME Y14.5M-1994]
|
Geometric Principles
as Applied to Sheet Metal and Flexible/Plastic Molded Parts
·
Plus and minus tolerances; Legal and useful advantages vs. illegal use
and disadvantages
·
Size
·
Creating a datum reference frame for flexible parts
·
Creating a datum reference frame
for parts with draft angle
·
Tolerancing sheet metal parts to
mate with other sheet metal parts vs. a variety of other materials
·
MMC vs. LMC vs.
RFS; Advantages of
each for castings, molded parts, sheet metal, breakout/wall thickness problems,
mating features, fixturing, cost and tolerance stack-up analysis software
packages currently available
·
Virtual condition vs. resultant
condition
·
Form and orientation; When to use
geometric symbology and when it is not necessary or advantageous
·
Profile and position for sheet
metal and plastic molded parts
·
Restrained vs.
free
state
controls on flexible parts
·
Datum targets; Points, lines and
areas to stabilize difficult part configurations
·
Use of chain lines
· Compound
datums
·
Pattern datums
·
Compound-pattern datums on
irregular shaped sheet metal parts; Functionally toleranced, a guide to
manufacture and how to inspect
·
Combining plane surfaces, features
of size and datum targets to establish a datum reference frame
·
Tolerancing for in-process
considerations and final functional requirements
·
Simultaneous vs. separate gaging
requirements
·
Composite vs. two single-segment
controls of profile and position
·
Direct vs. indirect tolerance
relationships
Manufacturing
and Verification
·
Check fixtures and holding fixtures; Expanding vs. fixed size pins
· CMM’s; How to
get the best, most repeatable results
· Surface plate
equipment and how to best use it
· Functional
gaging;
During manufacture, in presses vs. after the fact for holding a close Cpk and
for attribute data collection
· Soft functional
gaging for profiles and position for variable data collection
Case Studies
·
Large panels
· Assemblies
·
Light gage
·
Heavy gage
·
Plastic parts
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